CN109710005B - A monitoring system and its realization method - Google Patents

Abstract

The invention discloses a monitoring system and a realization method thereof, wherein the system comprises: the system comprises a granary management information system, each granary information transceiving control terminal, a granary temperature and humidity monitoring unit, an excitation/charging source module and corresponding cooling, dehumidifying and ventilating equipment; the information receiving and transmitting control terminal of each granary is connected with a granary management information system through a communication network, connected with cooling, dehumidifying and ventilating equipment through control signals, connected with a granary temperature and humidity monitoring unit in the same granary in a high-frequency wireless mode, and connected with an excitation/charging source module in the same granary in a wireless or wired mode; the excitation/charging source module is connected with a granary temperature and humidity monitoring unit in the same cabin in a low-frequency wireless mode. The method is characterized in that when the time period is the turning time period, the turning quality is judged according to the proportion of the sum of the quantity of output information sent out from the time period setting to the current of the granary temperature and humidity monitoring units put into the granary to the total quantity of the granary temperature and humidity monitoring units set in the granary.

Description

A monitoring system and its realization method

technical field

The invention belongs to the technical field of granary safety, and in particular relates to a monitoring system for a granary and a realization method thereof.

Background technique

As we all know, in the process of grain storage, it is easy to be affected by temperature, humidity and other factors, and problems such as fever, mildew, and insect breeding may occur. In order to reduce the loss in the process of grain storage and ensure the quality and quality of the grain, the granary monitoring and management system takes corresponding measures according to the specific conditions of the temperature and humidity of the grain in the granary that are monitored and uploaded by the sensor device of the end node, and conducts cooling, dehumidification, or restocking. At present, the granary monitoring and management system: according to the specific conditions of the temperature and humidity uploaded by the sensor device of the end node, it can be done automatically when cooling and/or dehumidification is required, but manual participation is required when the warehouse needs to be turned over. There is no automatic detection method to supervise the quality of warehouse turnover, unless there are managers on site to supervise the quality of warehouse turnover.

As we all know, the sensor device nodes used for anti-theft at the end of the granary monitoring and management system are generally human infrared sensors and/or cameras. Once others break through the defense line of human infrared sensors and cameras, it is possible to steal the grain. And it is well known that most of the grain storage adopts the accumulation type, and the reduction of the grain accumulation and/or the collapse of the accumulated grain will cause the pressure change in the granary. When stealing, the amount of grain accumulated will be reduced, and even the accumulated grain will collapse. At present: during the anti-theft period, there is no terminal node of the granary monitoring and management system to assist the anti-theft for the sensing device of the pressure change in the stacked granary.

As we all know, the temperature and humidity sensing device nodes set at the end of the granary monitoring and management system in the stacked granary are required to be distributed in the grain pile, and the temperature and humidity sensing device nodes in the grain pile should be arranged horizontally. The distance between the directions is not more than 3 meters. The temperature and humidity sensing device nodes are divided into wireless (such as Zigbee technology-based temperature and humidity sensing device nodes) and wired (such as plug-in temperature and humidity sensing device nodes). . The wired temperature and humidity sensing device node is convenient to supply power, but it is inconvenient to set it in the grain pile; while the wireless temperature and humidity sensing device node is convenient to be buried in the grain pile, but the power supply must be wireless and/or battery powered, and Without battery power supply, if the temperature and humidity cannot be monitored in real time, it cannot be uploaded to the granary monitoring and management system. The wired temperature and humidity sensing device can not only facilitate the regular inspection of the granary monitoring and management system, but also facilitate the real-time upload of the temperature and humidity exceeding the limit to the granary monitoring and management system during the inspection period. The power supply of the sensing device is convenient, so the wired temperature and humidity sensing device can be in a live working state all the time, but the wired temperature and humidity sensing device node is not convenient to be installed in the stacked granary; The sensor node can facilitate the regular inspection of the granary monitoring and management system, and the wireless temperature and humidity sensor node is more convenient than the wired temperature and humidity sensor node, but the granary monitoring and management system is not on patrol. During the inspection, if the temperature and humidity exceeds the limit, it needs to be uploaded to the granary monitoring and management system in real time. The wireless temperature and humidity sensing device node must have its own power supply battery. Because the battery power is limited, it must be considered in the state of energy saving. When the management system is not in the inspection period, if the temperature and humidity exceed the limit, it will be uploaded to the granary monitoring and management system in real time, and the problem of convenient replenishment of the battery should be considered at the same time. After investigation, there is still no good solution to solve the energy-saving problem of the temperature and humidity sensing device with the wireless way of uploading the temperature and humidity exceeding the limit to the granary monitoring and management system in real time, and to solve the battery power replenishment problem, because once the wireless way The temperature and humidity sensing device is embedded in the stacked granary, which is inconvenient to take out.

It is well known that the higher the temperature, the lower the moisture content of grain safety. It has been investigated that the moisture content of grain safety storage decreases by 1% for every 5°C increase in the temperature of the grain pile. Therefore, when the temperature rises, the original moisture is maintained, which will accelerate the deterioration of the food. Therefore, when the temperature rises to the limit, the real-time prompt is particularly important.

The current granary monitoring and management system is still unable to evaluate the quality of the warehouse turnover and alarm theft in real time.

SUMMARY OF THE INVENTION

The purpose of the present invention and the technical problem to be solved are aimed at the existing defects of the above prior art, and propose a monitoring system and its realization method, which realizes: 1. having patrol inspection and over-temperature real-time alarm; 2. collecting warehouse turnover and theft. Timely prompts and alarms; ③ It has quality evaluation of warehouse turnover and graded alarms according to the amount of theft.

In order to achieve the above-mentioned purpose, the technical scheme of the present invention is:

A monitoring system includes a granary management information system set in a monitoring center, an information sending and receiving control terminal set in each granary, a granary temperature and humidity monitoring unit, an excitation/charging source module and corresponding cooling, dehumidification and ventilation equipment; each The information sending and receiving control terminal of each granary is connected with the granary management information system through the communication network, the information sending and receiving control terminal is connected with the cooling, dehumidification and ventilation equipment through the control signal, and the temperature and humidity monitoring unit of the granary communicates with the information in the same cabin through high-frequency wireless means. The transceiver control terminal is connected, the excitation/charging source module is connected with the information transceiver control terminal in the same cabin through wireless or wired, and the excitation/charging source module is connected with the granary temperature and humidity monitoring unit in the same cabin through a low-frequency wireless method; The excitation/charging source module includes an excitation signal program module and a charging signal program module sent under the control of the information transceiver control terminal; the information transceiver control terminal includes a restocking quality evaluation program module and a grading alarm program module according to the amount of theft;

The granary temperature and humidity monitoring unit includes: a rectifier module, a demodulation decoding control module, a battery charging module, a temperature and humidity acquisition module, a temperature sensor switch, a pressure switch module, a low-frequency antenna, a battery, a first field effect tube, a second field effect tube Effect tube, third field effect tube, fourth field effect tube, fifth field effect tube, sixth field effect tube, seventh field effect tube, resistor R3; the low frequency antenna wirelessly communicates with the excitation/charging source module in the granary connected to receive the excitation/charging source signal sent by the excitation/charging source module; the low-frequency antenna is respectively connected with the input of the rectification module and the demodulation decoding control module; the output of the rectification module is respectively connected with the power input of the demodulation decoding control module and the first The sources of the three field effect transistors are connected to each other, the drain of the third field effect transistor is connected to the input of the battery charging module, the gate of the third field effect transistor is connected to the drain of the second field effect transistor, and the second field effect transistor is connected to the drain of the second field effect transistor. The grid of the effect tube is connected to an output of the demodulation and decoding control module, the source of the second field effect tube is connected to the negative pole of the battery; the charging output of the battery charging module is connected in parallel with the input of the pressure switch module and then connected The positive pole of the battery; a signal output of the battery charging module is connected to the input of the temperature and humidity acquisition module, and another signal output of the battery charging module is connected to the input of the demodulation decoding control module; the grid of the first FET is connected to the The other output of the modulation and decoding control module is connected, the source of the first FET is connected to the negative electrode of the battery; the output of the pressure switch module is respectively connected with the grid of the seventh FET and the A/D of the temperature and humidity acquisition module The input is connected; the gate of the fifth FET is connected in parallel with the drain of the seventh FET and one end of the resistor R3, the other end of the resistor R3 is connected with the negative electrode of the battery, and the source of the fifth FET It is connected to the negative electrode of the battery; the grid of the fourth field effect tube is connected to the output of the temperature and humidity acquisition module, the source electrode of the fourth field effect tube is connected to the negative electrode of the battery; the source electrode of the sixth field effect tube is connected to the The source of the seventh FET and one end of the temperature-sensing switch are connected in parallel with each other and then connected to the positive electrode of the battery. The drain of the sixth FET is connected in parallel with the other end of the temperature-sensing switch and then connected to the temperature and humidity acquisition. The power input of the module, the gate of the sixth FET is connected in parallel with the drain of the first FET, the drain of the fourth FET and the drain of the fifth FET; the temperature and humidity acquisition module is connected by wireless The method is connected to the information sending and receiving control terminal; the negative pole of the power supply of the rectifier module, the negative pole of the power supply of the battery charging module, the negative pole of the power supply of the temperature and humidity acquisition module and the negative pole of the power supply of the pressure switch module are connected to the negative pole of the battery.

The pressure switch module described above includes: resistor R1, resistor R2, a force button, and a capacitor; one end of the resistor R2 is connected to the positive electrode of the battery, and the other end of the resistor R2 is connected in series with the normally closed contact of the force button and the capacitor. The positive pole is connected, the positive pole of the capacitor is connected to the normally open contact of the force button in series, and the negative pole of the capacitor is connected to the resistance R1, and the negative pole of the capacitor is connected to the negative pole of the battery; the connection from the normally closed contact of the force button to the resistance R2 The wires are respectively connected to the grid of the seventh field effect transistor and the A/D input of the temperature and humidity acquisition module.

The first field effect transistor, the second field effect transistor, the fourth field effect transistor and the fifth field effect transistor mentioned above are all N-channel enhancement type MOS transistors; the third field effect transistor, the sixth field effect transistor The transistor and the seventh field effect transistor are both P-channel enhancement type MOS transistors.

The temperature and humidity acquisition module described above includes a temperature and humidity detection and processing control unit, a wireless transceiver unit, a temperature sensor, a humidity sensor, a high-frequency antenna, an indicator light, and a vibration sensor; the temperature and humidity detection and processing control unit is serially connected to the wireless transceiver unit in sequence. , after the high-frequency antenna, wirelessly establishes a connection with the information transceiver control terminal; the input of the temperature and humidity detection processing control unit is connected to a temperature sensor, a humidity sensor, a vibration sensor, a pressure switch module and a battery charging module; the output of the temperature and humidity detection processing control unit The grid and indicator light of the fourth field effect transistor are connected; the vibration sensor is connected with the interruption input of the temperature and humidity detection processing control unit; the pressure switch module is connected with the A/D input of the temperature and humidity detection processing control unit. connect.

The capacitor C mentioned above is a leakage tantalum capacitor or a niobium capacitor.

The above monitoring system is characterized in that the force button is a two-way contact switch, one is normally open and the other is normally closed.

In order to achieve the above-mentioned purpose, another technical scheme of the present invention is:

A method for implementing a monitoring system, comprising the following steps:

(1) When the information transceiver control terminal outputs the inspection control information to the excitation/charging source module, an excitation signal is sent to activate the temperature and humidity acquisition module in the temperature and humidity monitoring unit of the granary to work;

(2) When the information transceiver control terminal outputs the charging control information to the excitation/charging source module, it sends a charging signal to wirelessly charge the battery in the temperature and humidity monitoring unit of the granary;

(3) Set the temperature and humidity acquisition module in the temperature and humidity monitoring unit of the granary. When the output of the pressure switch module is monitored through the A/D port to be less than or equal to one-third of the battery terminal voltage, it is determined that the warehouse is currently being turned over or the grain has been released or the grain has been stolen, and the pressure is uploaded. The switch module has output information to the information sending and receiving control terminal:

①When the time period is set as the time period for grain release or warehouse turnover, the identification code of warehouse turnover/grain release is sent back to the corresponding granary temperature and humidity monitoring unit, and when the time period is set as the warehouse turnover time period, the quality of warehouse turnover is judged : Set the proportion of the total number of granary temperature and humidity monitoring units set in the grain pile according to the sum of the number of output information sent from the time period setting to the current granary temperature and humidity monitoring unit placed in the grain pile, To judge the quality of the turnover, the higher the proportion of output information, the better the quality of the turnover, and vice versa.

②When the time period is set as the anti-theft time period, the anti-theft identification code will be sent back to the corresponding granary temperature and humidity monitoring unit, and theft alarm will be prompted. The alarm level is set from the sum of the number of output information sent from the beginning to the present. The greater the sum of the number, the more the number of alarms.

Beneficial effects:

A monitoring system of the present invention and its implementation method include: ① having patrol inspection and over-temperature real-time alarm; ② having prompt and alarm when warehouse turnover or theft occurs; , over-temperature, the battery will supply power after any event that the pressure switch module generates the excitation signal, which is conducive to battery energy saving; ④ The excitation signal generated by the pressure switch module in the temperature and humidity monitoring unit of the terminal granary can be used as the behavior of turning over the warehouse. The signal can also be used as a signal of theft, so as to monitor the behavior of turning over and theft in real time; ⑤After the temperature and humidity monitoring unit of the terminal granary is turned over and put into grain, the indicator light is lit to facilitate the process of overturning and putting grain. Find the temperature and humidity monitoring unit of the granary in the middle, and reset the temperature and humidity monitoring unit of the granary.

Description of drawings

FIG. 1 is a schematic diagram of the connection of a monitoring system according to the present invention;

Fig. 2 is the principle block diagram of the temperature and humidity monitoring unit of the granary in the present invention;

In the picture: 100. rectifier module, 200. demodulation and decoding control module, 300. battery charging module, 400. temperature and humidity acquisition module, 500. temperature sensor switch, 700. pressure switch module, 600. low frequency antenna, E. battery, Q1, Q2, Q3, Q4, Q5, Q6, Q7. First to seventh field effect transistors, 410. Temperature and humidity detection and processing control unit, 420. Wireless transceiver unit, 430. Temperature sensor, 440. Humidity sensor, 450. High-frequency antenna, 460. indicator light, 470. vibration sensor, AN. force button, C. capacitor, R1, R2, R3. resistance, A1, A2, An. granary temperature and humidity monitoring unit, n. is set on a The number of granary temperature and humidity monitoring units in the granary grain pile.

Detailed ways

As shown in Figures 1 and 2, a monitoring system includes a granary management information system located in the monitoring center, an information sending and receiving control terminal located in each granary, a granary temperature and humidity monitoring unit, an excitation/charging source module and corresponding Cooling, dehumidification and ventilation equipment; the information sending and receiving control terminal of each granary is connected with the granary management information system through the communication network, the information sending and receiving control terminal is connected with the cooling, dehumidification and ventilation equipment through the control signal, and the temperature and humidity monitoring unit of the granary is connected by The high-frequency wireless method is connected to the information transceiver control terminal in the same cabin, the excitation/charging source module is connected to the information transceiver control terminal in the same cabin by wireless or wired, and the excitation/charging source module is connected to the same cabin through the low-frequency wireless method. The temperature and humidity monitoring unit of the granary is connected; the excitation/charging source module includes an excitation signal program module and a charging signal program module sent under the control of the information transceiver control terminal; the information transceiver control terminal includes a warehouse turnover quality evaluation program module and The alarm program module is graded according to the amount of theft.

The granary temperature and humidity monitoring unit includes: rectification module 100, demodulation decoding control module 200, battery charging module 300, temperature and humidity acquisition module 400, temperature sensor switch 500, pressure switch module 700, low frequency antenna 600, battery E, Field effect transistor Q1, second field effect transistor Q2, third field effect transistor Q3, fourth field effect transistor Q4, fifth field effect transistor Q5, sixth field effect transistor Q6, seventh field effect transistor Q7, resistor R3 The low frequency antenna 600 is wirelessly connected with the excitation/charging source module in the granary, and receives the excitation/charging source signal sent by the excitation/charging source module; The output of the rectifier module 100 is respectively connected to the power input of the demodulation and decoding control module 200 and the source of the third field effect transistor Q3, and the drain of the third field effect transistor Q3 is connected to the input of the battery charging module 300. , the gate of the third field effect transistor Q3 is connected to the drain of the second field effect transistor Q2, the gate of the second field effect transistor Q2 is connected to an output of the demodulation decoding control module 200, the second field effect transistor The source of Q2 is connected to the negative electrode of the battery E; the charging output of the battery charging module 300 is connected in parallel with the input of the pressure switch module 700 and then connected to the positive electrode of the battery E; a signal output of the battery charging module 300 is connected to the temperature and humidity acquisition module 400 is connected to the input, another signal output of the battery charging module 300 is connected to the input of the demodulation and decoding control module 200; the gate of the first FET Q1 is connected to another output of the demodulation and decoding control module 200, The source of the first field effect transistor Q1 is connected to the negative electrode of the battery E; the output of the pressure switch module 700 is connected to the gate of the seventh field effect transistor Q7 and the A/D input of the temperature and humidity acquisition module 400 respectively; the fifth The gate of the field effect transistor Q5 is connected in parallel with the drain of the seventh field effect transistor Q7 and one end of the resistor R3, the other end of the resistor R3 is connected to the negative electrode of the battery E, and the source of the fifth field effect transistor Q5 is connected to the battery. The negative electrode of E is connected; the grid of the fourth field effect transistor Q4 is connected with the output of the temperature and humidity acquisition module 400; the source electrode of the fourth field effect transistor Q4 is connected with the negative electrode of the battery E; the sixth field effect transistor Q6 The source of the seventh FET Q7 and one end of the temperature-sensing switch 500 are connected in parallel with each other and then connected to the positive electrode of the battery E, and the drain of the sixth FET Q6 is connected to the other end of the temperature-sensing switch 500 After being connected in parallel, it is connected to the power input of the temperature and humidity acquisition module 400, the gate of the sixth field effect transistor Q6 and the drain of the first field effect transistor Q1, the drain of the fourth field effect transistor Q4 and the fifth field effect transistor The drains of Q5 are connected in parallel with each other; the temperature and humidity collection module 400 is wirelessly connected to the information transceiver control terminal; The negative pole of the power supply of the module 700 is connected to the negative pole of the battery E.

The above-mentioned first field effect transistor Q1, second field effect transistor Q2, fourth field effect transistor Q4 and fifth field effect transistor Q5 are all N-channel enhancement type MOS transistors; the above-mentioned third field effect transistor Q3, the sixth field effect transistor Q6 and the seventh field effect transistor Q7 are all P-channel enhancement type MOS transistors.

The pressure switch module 700 described above includes: a resistor R1, a resistor R2, a force button AN, and a capacitor C; one end of the resistor R2 is connected to the positive electrode of the battery E, and the other end of the resistor R2 is connected in series with the normally closed contact of the force button AN. After the point is connected to the positive pole of the capacitor C, the positive pole of the capacitor C is connected to the normally open contact of the force button AN in series, and the resistor R1 is connected to the negative pole of the capacitor C, and the negative pole of the capacitor C is connected to the negative pole of the battery E; The normally closed contact of the button AN and the connection line of the resistor R2 are respectively connected to the grid of the seventh field effect transistor Q7 and the A/D input of the temperature and humidity acquisition module 400 .

The above-mentioned force button AN is a two-way contact switch, one is normally open and the other is normally closed, and the force on the force surface of the force button AN is set as follows: when the force is greater than or equal to 5 kgf, the normally open The one-way contact of the normally closed is closed, and the normally-closed one-way contact is disconnected; when the force is less than 5 kgf, the normally-open one-way contact is disconnected (keep normally open), and the normally-closed one-way contact is closed (keep normally closed). That is, when the force of the force-bearing surface of the force-bearing button AN is greater than or equal to 5 kg force, the normally open one-way contact is closed, and the normally-closed one-way contact is disconnected, when the force of the force-bearing surface of the force-bearing button AN is less than 5 kg. When the force is applied, the normally open one-way contact returns to open, and the normally closed one-way contact returns to on (closed). In the monitoring system of the present invention, the granary temperature and humidity monitoring unit is installed in the carrying box, and the force-bearing surface of the force-bearing button AN is concavely arranged on the panel of the bearing box of the granary temperature and humidity monitoring unit, that is, the receiving force of the force-bearing button AN The force surface is recessed into the panel of the carrying box, which is beneficial to not easily affected by external pressure during the transportation and backup storage of the granary temperature and humidity monitoring unit to trigger the power supply circuit of the battery E to energize, thereby improving the service life of the battery E.

For the capacitor C mentioned above, select capacitors with less leakage, such as tantalum capacitors, niobium capacitors, and the like.

In the pressure switch module 700, the charging circuit formed by the resistor R2, the normally closed contact of the force button AN and the capacitor C is formed by the battery E. The disconnection and connection of the charging circuit are controlled by the normally closed contact of the force button AN. The normally closed contact of the force button AN is disconnected, the charging circuit formed by the series connection of the resistor R2 and the capacitor C is disconnected, the normally open contact of the force button AN is connected, and the capacitor C is discharged through the resistor R1. In the case of ensuring safety, the resistance R1 should be as small as possible to ensure that when the force of the force-bearing surface of the force-bearing button AN is greater than or equal to 5 kg force, that is, after the normally open contact of the force-bearing button AN is turned on, the capacitor C will have a shorter value. Time to discharge power. The voltage on the connection terminal of the resistor R2 and the normally closed contact of the force button AN is used as the output signal, which is led to the gate of the seventh field effect transistor Q7 and the A/D input of the temperature and humidity acquisition module 400 . During the charging process of the battery E through the charging circuit formed by the resistor R2, the normally closed contact of the force button AN and the capacitor C, the voltage on the connection end of the resistor R2 and the normally closed contact of the force button AN increases with the increase of the capacitor C. When charging, gradually increase the terminal voltage close to the battery E from zero electricity. When the capacitor C is fully charged or the normally closed contact of the force button AN is disconnected, the voltage on the connection end of the resistor R2 and the normally closed contact of the force button AN is the terminal voltage of battery E. Therefore, the normally closed contact of the force button AN is turned on, and the seventh field effect transistor Q7 is turned on. With the charging of the capacitor C or the normally closed contact of the force button AN, the seventh field effect transistor Q7 is turned on. becomes cut off again. The requirements for the size selection of the capacitor C and the resistor R2 are: during the charging process, the control voltage obtained from both ends of the resistor R2 is greater than or equal to the turn-on voltage of the seventh field effect transistor Q7 ∣U _GS(th) ∣, and must be maintained until the temperature and humidity collection. After the module 400 is energized to control the fourth FET Q4 from off to on, and the output of the pressure switch module 700 is detected by A/D, it can be identified that it is less than one third of the battery E.

The above-mentioned excitation/charging source module is used to generate excitation and charging signals for the temperature and humidity monitoring unit of the granary, and includes an excitation signal program module and a charging signal program module that are controlled and sent by the information transceiver control terminal. The excitation/charging source module is wirelessly connected to the low-frequency antenna 600 in the temperature and humidity monitoring unit of the granary. The excitation/charging source module is connected with the information transceiver control terminal, and the signal sent by the excitation/charging source module is controlled by the information transceiver control terminal. When the information transceiver control terminal outputs the inspection control information to the excitation/charging source module, the excitation/charging source module receives the inspection control information, executes the excitation signal program module, and sends out the excitation signal. The transmitted excitation signal contains the excitation code, and Set the same excitation code in the granary temperature and humidity monitoring unit in the same granary; when the information transceiver control terminal outputs the stop inspection control information to the excitation/charging source module, the excitation/charging source module receives the stop inspection control information and stops executing the excitation signal The program module, the excitation/charge source module terminates the transmission of the excitation signal. When the information transceiver control terminal outputs the charging control information to the excitation/charging source module, the excitation/charging source module receives the charging control information, executes the charging signal program module, and sends out the charging signal. The charging codes in the granary temperature and humidity monitoring unit in a granary are consistent; when the information transceiver control terminal outputs stop charging control information to the excitation/charging source module, the excitation/charging source module receives the stop charging control information, stops executing the charging signal program module, and activates the /The charging source module terminates the charging signal.

The information sending and receiving control terminal is an intermediate node, which is used for specific inspection and real-time reception of the temperature and humidity monitoring unit of the granary in the granary, and control of the output signal of the excitation/charging source module. The temperature and humidity acquisition module 400 in the humidity monitoring unit is connected, and the information transceiver control terminal is connected to the granary management information system of the monitoring center through the network, and is connected to the excitation/charging source module by wire or wireless, and outputs the corresponding control signal to the control center according to the requirements. Excitation/charging source module; and the information transceiver control terminal is also connected with control signals to temperature regulation, moisture removal, and ventilation equipment, as well as with infrared and camera anti-theft terminal devices.

When the information sending and receiving control terminal requests to inspect the temperature and humidity monitoring unit of the granary, and outputs the inspection control information to the excitation/charging source module, the information sending and receiving control terminal waits until the communication connection is established with more than three granary temperature and humidity monitoring units in the granary. Output the stop inspection control information to the excitation/charging source module, and transmit the inspection information mark to all granary temperature and humidity monitoring units in the grain pile.

When the information transceiver control terminal requests to replenish the battery E in the granary temperature and humidity monitoring unit, and outputs the charging control information to the excitation/charging source module, the information transceiver control terminal will receive a battery full signal from all the granary temperature and humidity monitoring units in the granary where it is located. , and output stop charging control information to the excitation/charging source module.

When inspection is required during the charging process, the information transceiver control terminal immediately outputs stop charging control information to the excitation/charging source module, and then outputs the inspection control information to the excitation/charging source module.

The low-frequency antenna 600 receives the signal sent by the excitation/charging source module, and sends it to the power input end of the rectification module 100 and the signal input end of the demodulation and decoding control module 200. The rectifier module 100 rectifies the signal connected to the low-frequency antenna 600. The regulated output working voltage is sent to the power input terminal of the demodulation and decoding control module 200 and the source of the third field effect transistor Q3.

The demodulation and decoding control module 200 demodulates and decodes the signal connected to the low-frequency antenna 600. The demodulation and decoding control module 200 also stores the excitation code and the charging code. The demodulation and decoding control module 200 combines the decoded code with the stored excitation code. Comparison of coding and charging coding: when coding is activated, output a high potential (greater than or equal to the turn-on voltage U _GS(th) of the first FET Q1) to the gate of the first FET Q1, and output a low potential (less than the second MOSFET Q1). The turn-on voltage U _GS(th) ) of the field effect transistor Q2 reaches the gate of the second field effect transistor Q2, the first field effect transistor Q1 is turned on, and the second field effect transistor Q2 is turned off; when it is charging and coding, it outputs a low potential ( is smaller than the turn-on voltage U _GS(th) of the first field effect transistor Q1 to the gate of the first field effect transistor Q1, and outputs a high potential (greater than or equal to the turn-on voltage U _GS(th) of the second field effect transistor Q2) to the gate of the first field effect transistor Q1. The gates of the two field effect transistors Q2, the first field effect transistor Q1 is turned off, and the second field effect transistor Q2 is turned on. The demodulation decoding control module 200 does not receive its excitation coding and charging coding signals, and outputs a low potential to the gates of the first field effect transistor Q1 and the second field effect transistor Q2, the first field effect transistor Q1 and the second field effect transistor Q2 all expire.

During the period when the demodulation decoding control module 200 controls the third field effect transistor Q3 to be turned on through the second field effect transistor Q2, and the output of the rectifier module 100 is sent to the battery charging module 300 to charge the battery E through the third field effect transistor Q3, the demodulation is performed. The decoding control module 200 responds to the battery fullness signal input by the battery charging module 300, the demodulation decoding control module 200 receives the battery fullness signal input by the battery charging module 300, and the demodulation decoding control module 200 outputs a high potential to the first field effect transistor The gate of Q1 outputs a low potential to the gate of the second field effect transistor Q2, the first field effect transistor Q1 is turned on, the second field effect transistor Q2 is turned off, the demodulation decoding control module 200 suspends the corresponding charging signal, and the delay is 3 Second, output a low potential to the gate of the first field effect transistor Q1, so that the first field effect transistor Q1 is turned off, or does not delay, until the demodulation decoding control module 200 has no working power supply, that is, after the battery E is fully charged, the demodulation After receiving the charging signal, the decoding control module 200 still keeps outputting a low potential to the gate of the second field effect transistor Q2, and keeps the control voltage output to the gate of the first field effect transistor Q1 unchanged.

The control module 200 to be demodulated and decoded has no power supply, the voltage output to the gates of the first field effect transistor Q1 and the second field effect transistor Q2 is zero, the first field effect transistor Q1 and the second field effect transistor Q2 are turned off, and the pause function is automatic. disappear.

During the period when the demodulation and decoding control module 200 suspends the corresponding charging signal, the demodulation and decoding control module 200 does not lose the working power. In this case, after receiving the excitation code, the charging suspension function is released, that is, after receiving the excitation code, the demodulation and decoding control The module 200 responds to the charging signal next time.

The second field effect transistor Q2 is turned off, and the third field effect transistor Q3 is turned off; the second field effect transistor Q2 is turned on, and the third field effect transistor Q3 is turned on.

The third field effect transistor Q3 is turned off, and the output of the rectifier module 100 cannot charge the battery E through the battery charging module 300 through the third field effect transistor Q3, that is, the third field effect transistor Q3 is turned off, and the output voltage of the rectifier module 100 stops passing through the third field effect transistor Q3. The FET Q3 charges the battery E through the battery charging module 300 . The third field effect transistor Q3 is turned on, and the voltage output by the rectifier module 100 charges the battery E through the battery charging module 300 through the third field effect transistor Q3.

The battery charging module 300 includes a battery E charging circuit and a battery E capacity monitoring circuit. The charging output of the battery charging module 300 is connected to the positive pole of the battery E, and the output of the battery E capacity monitoring circuit is connected to the input of the demodulation decoding control module 200 and the input of the temperature and humidity acquisition module 400 .

When any one of the first field effect transistor Q1, the fourth field effect transistor Q4 and the fifth field effect transistor Q5 is turned on, the gate-source control voltage U _GS applied to the sixth field effect transistor Q6 is less than or equal to its When the voltage U _GS(th) is turned on, the sixth field effect transistor Q6 is turned on.

When the first field effect transistor Q1, the fourth field effect transistor Q4 and the fifth field effect transistor Q5 are all turned off, the gate-source control voltage U _GS applied to the sixth field effect transistor Q6 is greater than its turn-on voltage U _GS(th) , The sixth field effect transistor Q6 is turned off.

The on-off of the fifth field effect transistor Q5 is controlled by the seventh field effect transistor Q7: the seventh field effect transistor Q7 is turned on, the fifth field effect transistor Q5 is turned on; the seventh field effect transistor Q7 is turned off, and the fifth field effect transistor Q5 is turned off .

The sixth field effect transistor Q6 and the switch of the temperature sensing switch 500 are connected in parallel to control the power input path from the battery E to the temperature and humidity acquisition module 400 .

The temperature-sensing switch 500 is used to turn on the power supply of the battery E when the temperature is over-temperature, so as to realize the real-time alarm of over-temperature.

The temperature-sensing switch 500 is a passive physical contact switch, and its contacts are normally open, that is, when the temperature-sensing switch 500 is set to sense that the temperature is lower than its set temperature, the contact of the temperature-sensing switch 500 is disconnected, Normal working state; when the temperature switch 500 senses that the temperature is greater than or equal to its set temperature, the contact of the temperature switch 500 is turned on (closed). The contact of the sense switch 500 is restored to the normal working state, that is, disconnected.

Generally, the temperature in the grain pile of the granary is required to be kept below 30°C all the year round, so the present invention adopts the set temperature of the temperature switch 500 as: 30°C plus 5°C, that is, when the temperature switch 500 senses a temperature greater than or equal to 35°C, The battery E is connected to the temperature and humidity acquisition module 400 through the temperature sensor switch 500, and the temperature and humidity acquisition module 400 is powered on to work.

The temperature and humidity acquisition module 400 is used to collect and read specific temperature and humidity, anti-theft, warehouse turning, grain release, battery E power, etc., and upload it to the information transceiver control terminal for corresponding control, and includes a temperature and humidity detection and processing control unit 410, wireless transceiver unit 420, temperature sensor 430, humidity sensor 440, high-frequency antenna 450, indicator light 460, vibration sensor 470; the temperature and humidity detection processing control unit 410 is serially connected to the wireless transceiver unit 420 and the high-frequency antenna 450 Establish a connection with the information sending and receiving control terminal in a wireless manner; the temperature and humidity detection processing control unit 410 is connected to a temperature sensor 430, a humidity sensor 440, a vibration sensor 470, a pressure switch module 700 and a battery charging module 300; the temperature and humidity detection processing control unit 410 The output is connected to the gate of the fourth field effect transistor Q4 and the indicator light 460; the vibration sensor 470 is connected to the temperature and humidity detection processing control unit 410 to interrupt the input; the pressure switch module 700 is connected to the temperature and humidity detection processing control unit The A/D input of the 410 is connected. The temperature and humidity detection processing control unit 410 is an information processing control unit that collects, processes and uploads the corresponding input signals, and outputs corresponding control according to the processing results. The temperature and humidity detection processing control unit 410 includes: a central processing unit, a The input/output interface and EEPROM memory suitable for the input/output circuit are provided with the corresponding ID code, and the corresponding detection and identification control program module and the program module for communicating with the information sending and receiving control terminal are embedded, and the vibration interrupt service program is also embedded. module; also contains the voltage monitoring circuit of battery E.

When the output of the pressure switch module 700 is less than the terminal voltage of the battery E, it means that the normally closed contact of the force-bearing button AN is on, that is to say, the force-bearing surface of the force-bearing button AN bears less than 5 kilograms of force, and the normally closed contact The point at the on-time is less than the time required for the capacitor C to be fully charged, and it can also be said that the time for the normally closed contact to remain on is less than the time required for the capacitor C to be fully charged. When the output voltage of the pressure switch module 700 is closer to zero voltage, it means that the normally closed contact has just happened. long. When the output of the pressure switch module 700 is equal to the terminal voltage of the battery E, it means that the normally closed contact of the stressed button AN is disconnected or the normally closed contact is connected and maintained until the current time is greater than the time required for the capacitor C to be fully charged, That is, when the pressure switch module 700 outputs the terminal voltage of the battery E, it means that the force on the force-bearing surface of the force-bearing button AN is greater than or equal to 5 kgf or indicates that the normally closed contact is connected and maintained for a long time.

Since the temperature and humidity monitoring unit of the granary in the grain pile is usually in a static state, and the time in the static state is much longer than the time required for the capacitor C to be fully charged, the temperature and humidity monitoring unit of the granary in the grain pile is usually in a static state. No matter what the force is on the force-bearing surface of the force-bearing button AN, the output of the pressure switch module 700 is equal to zero voltage.

Therefore, when the granary temperature and humidity monitoring unit is installed in the grain pile in the present invention, the upper layer must ensure that the force of the force-bearing surface of the force-bearing button AN is greater than or equal to 5 kgf.

Since warehouse turnover, grain release and anti-theft should capture the current behavior in real time, in the vibration interruption service program module of the present invention and in the process of detecting the output of the pressure switch module 700 through the A/D port at the beginning of power-on, set: the pressure switch is detected and recognized. When the output voltage of the module 700 is less than or equal to one-third of the battery E, it is determined that the warehouse is currently being turned over or grain is being released or the grain has been stolen, and takes over the control of the fourth field effect transistor Q4 being turned off; the output voltage of the pressure switch module 700 is detected and recognized When it is greater than one-third of the battery E, it is determined that the warehouse is not being turned over and grain is put out, and the grain has not been stolen.

After the temperature and humidity detection processing control unit 410 in the temperature and humidity acquisition module 400 is powered on and initialized, it immediately outputs a high level to the gate of the fourth field effect transistor Q4 and detects the output of the pressure switch module 700 through the A/D port; High level to the gate of the fourth field effect transistor Q4, the fourth field effect transistor Q4 is turned on, so that the sixth field effect transistor Q6 is turned on/maintained; the pressure switch module 700 is identified through the A/D port detection The output is less than or equal to one-third of the terminal voltage of battery E, and it is determined that the pressure switch module 700 has output information, indicating that the warehouse is currently being turned over or grain is being put out or the grain has been stolen, shield the vibration sensor 470 to interrupt the application, and take over the control of the fourth field effect transistor Q4 Turn off the control, and upload the output information of the pressure switch module 700 to the information transceiver control terminal; if the A/D port detects and identifies that the output of the pressure switch module 700 is greater than one-third of the terminal voltage of the battery E, it is determined that the pressure switch module 700 has no output. Output information, do not shield the vibration sensor 470 to interrupt the application, and do not transmit the non-output information of the pressure switch module 700 to the information sending and receiving control terminal.

During the power-on operation of the temperature and humidity acquisition module 400, the vibration sensor 470 is interrupted during the unshielded period, the vibration sensor 470 vibrates, and the temperature and humidity detection processing control unit 410 responds to the interruption request sent by the vibration sensor 470, and detects and recognizes the pressure through the A/D port. The output of the switch module 700 is less than or equal to one third of the terminal voltage of the battery E, and it is determined that the pressure switch module 700 has output information, indicating that the warehouse is currently being turned over or grain is being released or the grain has been stolen, and the vibration sensor 470 is shielded. The effect transistor Q4 is turned off and controlled, and the output information of the pressure switch module 700 is uploaded to the information transceiver control terminal; if the output of the pressure switch module 700 is detected and recognized through the A/D port is greater than one third of the terminal voltage of the battery E, the pressure switch is identified as The module 700 has no output information, the vibration is identified as interference this time, the vibration sensor 470 is not shielded to interrupt the application, and the no output information of the pressure switch module 700 is not transmitted to the information transceiver control terminal.

The temperature and humidity detection processing control unit 41 detects and recognizes that the output of the pressure switch module 700 is less than or equal to one-third of the terminal voltage of the battery E through the A/D port, and shields the temperature and humidity detection and battery full identification until the temperature and humidity acquisition module 400 loses power .

The indicator light 460 is used to identify that the silo is being turned over or grain is put in during the silo turning and grain feeding, and flashes on, so as to facilitate the finding of the corresponding granary temperature and humidity monitoring unit during the turning and grain feeding process.

The information sending and receiving control terminal is embedded with a quality evaluation program module for warehouse turnover and a grading alarm program module according to the amount of theft. When the time period is set as warehouse turnover, the quality evaluation program module for warehouse turnover is executed, and when the time period is set as anti-theft, the grading alarm program module according to the amount of theft is executed.

After the temperature and humidity detection processing control unit 410 uploads the output information of the pressure switch module 700 to the information transmission and reception control terminal, the temperature and humidity detection processing control unit 410 waits for the response information of the information transmission and reception control terminal to the output information, when the time period is set to Turn over or put grain, whether it is turning over or putting grain, unified feedback of the identification code of turning over/grain to the temperature and humidity detection and processing control unit 410 in the corresponding granary temperature and humidity monitoring unit, if it is the time period for turning over the store Quality judgment; when the time period is set as anti-theft, the anti-theft identification code is fed back to the temperature and humidity detection processing control unit 410 in the corresponding granary temperature and humidity monitoring unit, and a theft alarm prompt is given; if it is a grain release time period, no evaluation is made. .

The temperature and humidity detection and processing control unit 410 recognizes that the feedback is the warehouse turning/graining identification code, and the temperature and humidity detection and processing control unit 410 lights the indicator light 460 . After the temperature and humidity detection processing control unit 410 lights the indicator light 460, the temperature and humidity detection processing control unit 410 detects the output of the pressure switch module 700, and sets the output of the pressure switch module 700 to be detected and recognized for 3 consecutive times from equal to the voltage of the battery E terminal. The temperature and humidity detection processing control unit 410 turns off the lit indicator light 460, otherwise, keep the indicator light 460 on; the extinguishing point After the indicator light 460 is on, the temperature and humidity detection and processing control unit 410 outputs a low level to the gate of the fourth field effect transistor Q4, and enters a sleep state until the temperature and humidity acquisition module 400 is powered off.

The temperature and humidity detection processing control unit 410 recognizes that the feedback is an anti-theft identification code, and the temperature and humidity detection processing control unit 410 outputs a low level to the gate of the fourth field effect transistor Q4, and enters a sleep state until the temperature and humidity acquisition module 400 fails. Electricity.

When the information sending and receiving control terminal is in the silo-turning time period set by it, it will judge the silo-turning quality: accumulate the temperature and humidity monitoring units of the granary that have output information uploaded in the grain pile during this time period, and calculate the proportion of the granary in the grain pile. The ratio of the total amount of temperature and humidity monitoring units in the granary is set, and the ratio is set as: the total proportion of output information, and the total proportion of output information is set as the evaluation index for the quality of warehouse turnover. The higher the total proportion of output information, the better the quality of the turnover is determined, and vice versa. The present invention sets that: when the total proportion of output information is greater than or equal to 95%, the quality of warehouse turnover is determined to be excellent; the total proportion of output information is greater than or equal to 85%, and less than 95%, and the quality of warehouse turnover is determined to be qualified; If the total proportion of output information is less than 85%, it is determined that the quality of the warehouse turnover is unqualified.

When the information transceiver control terminal is in the anti-theft time period set by it, it will make an alarm classification judgment: also from the time period setting to the present, the temperature and humidity monitoring units of the grain silo that have output information uploaded in the grain pile are accumulated, and Calculate its ratio to the total number of temperature and humidity monitoring units in the grain silo, and set the ratio as: the total ratio of output information, but the total ratio of output information is set as the alarm classification The higher the total proportion of output information, the more the number of thefts is determined, the higher the number of alarms is set to increase the number of alarms and the higher the top level of alarming layer by layer, and vice versa. For example: Assume: the lowest level is the specific management level, the middle level is the local government and the citizens of the region, and the highest level is the State Grain Bureau; the present invention sets: the total proportion of output information is less than 10% (and greater than 0%) ), only alarm the lowest-level management, and twice a day until the anti-theft is lifted; if the total proportion of output information is greater than or equal to 10% and less than 50%, then alarm to the lowest-level management, and at the same time to the middle-level The number of local governments and citizens in the region alarmed, and the number of alarms increased to 4 times a day until the anti-theft was lifted; the total proportion of output information reached greater than or equal to 50%, except for the lowest-level management and intermediate-level local governments and the region In addition to citizens, the highest level of the State Grain Bureau was also reported to the police, and the number of alarms was increased to 6 times a day until the anti-theft was lifted. Alarms can be presented through terminals such as mobile phones, TVs, and the Internet.

After the temperature and humidity acquisition module 400 in the granary temperature and humidity monitoring unit is energized to control the fourth FET Q4 to be turned on, when it is determined that the pressure switch module 700 has output information, it will take over the control of the fourth FET Q4 to turn off, which is controlled by the information It is determined by the warehousing/graining identification code and anti-theft identification code returned by the sending and receiving control terminal, otherwise, it is determined by the original function. The decision of the original function is: after completing the temperature, humidity and battery E full mark detection and identification and uploading tasks, output a low level to the gate of the fourth FET Q4; output a low level to the fourth FET Q4 After the gate, if the temperature and humidity collection module 400 does not lose power, the temperature and humidity detection and uploading are continued until the temperature and humidity collection module 400 loses power.

The information transceiver control terminal processes according to the received temperature and humidity information and performs corresponding cooling and dehumidification control according to the results.

The process of placing the granary temperature and humidity monitoring unit into the grain pile is as follows: during the grain accumulation process, the granary temperature and humidity monitoring unit is placed in a vertical layer thickness of 1.5 meters from the bottom to the top, and is placed on each layer at a distance of less than 5 meters, and Enter the corresponding ID number of the temperature and humidity monitoring unit of the granary into the granary management system.

Claims (6)

1. A monitoring system comprises a granary management information system arranged in a monitoring center, an information transceiving control terminal arranged in each granary, a granary temperature and humidity monitoring unit, an excitation/charging source module and corresponding cooling, dehumidifying and ventilating equipment; the system comprises an information transceiving control terminal of each granary, an information transceiving control terminal, an excitation/charging source module, a control unit, a communication network and a ventilation device, wherein the information transceiving control terminal of each granary is connected with a granary management information system through the communication network, the information transceiving control terminal is connected with a cooling device, a dehumidifying device and a ventilation device through control signals, the granary temperature and humidity monitoring unit is connected with the information transceiving control terminal of the same granary in a high-frequency wireless mode, the excitation/charging source module is connected with the information transceiving control terminal of the same granary in a wireless or wired mode, and the excitation/charging source module is; the excitation/charging source module comprises an excitation signal program module and a charging signal program module which are controlled and transmitted by the information transceiving control terminal; the information receiving and transmitting control terminal comprises a cabin turning quality evaluation program module and a grading alarm program module according to the stealing amount;

the granary temperature and humidity monitoring unit comprises: the device comprises a rectification module, a demodulation and decoding control module, a battery charging module, a temperature and humidity acquisition module, a temperature-sensitive switch, a pressure switch module, a low-frequency antenna, a battery, a first field-effect tube, a second field-effect tube, a third field-effect tube, a fourth field-effect tube, a fifth field-effect tube, a sixth field-effect tube, a seventh field-effect tube and a resistor R3; the low-frequency antenna is connected with an excitation/charging source module in the granary in a wireless mode and receives an excitation/charging source signal sent by the excitation/charging source module; the low-frequency antenna is respectively connected with the input of the rectifying module and the input of the demodulation and decoding control module; the output of the rectification module is respectively connected with the power input of the demodulation decoding control module and the source electrode of the third field effect transistor, the drain electrode of the third field effect transistor is connected with the input of the battery charging module, the gate electrode of the third field effect transistor is connected with the drain electrode of the second field effect transistor, the gate electrode of the second field effect transistor is connected with one output of the demodulation decoding control module, and the source electrode of the second field effect transistor is connected with the cathode of the battery; the charging output of the battery charging module is connected with the input of the pressure switch module in parallel and then is connected to the positive electrode of the battery; one signal output of the battery charging module is connected with the input of the temperature and humidity acquisition module, and the other signal output of the battery charging module is connected with the input of the demodulation and decoding control module; the grid electrode of the first field effect tube is connected with the other output of the demodulation decoding control module, and the source electrode of the first field effect tube is connected with the cathode of the battery; the output of the pressure switch module is respectively connected with a gate of the seventh field effect transistor and the A/D input of the temperature and humidity acquisition module; the grid electrode of the fifth field effect transistor is connected with the drain electrode of the seventh field effect transistor and one end of the resistor R3 in parallel, the other end of the resistor R3 is connected with the negative electrode of the battery, and the source electrode of the fifth field effect transistor is connected with the negative electrode of the battery; the grid electrode of the fourth field effect transistor is connected with the output of the temperature and humidity acquisition module, and the source electrode of the fourth field effect transistor is connected with the negative electrode of the battery; a source electrode of the sixth field effect tube is connected with a source electrode of the seventh field effect tube and one end of the temperature-sensitive switch in parallel and then connected to the anode of the battery, a drain electrode of the sixth field effect tube is connected with the other end of the temperature-sensitive switch in parallel and then connected to a power supply input of the temperature-humidity acquisition module, and a grid electrode of the sixth field effect tube is connected with a drain electrode of the first field effect tube, a drain electrode of the fourth field effect tube and a drain electrode of the fifth field effect tube in parallel; the temperature and humidity acquisition module is connected with the information receiving and transmitting control terminal in a wireless mode; the negative electrode of the power supply of the rectifying module, the negative electrode of the power supply of the battery charging module, the negative electrode of the power supply of the temperature and humidity acquisition module and the negative electrode of the power supply of the pressure switch module are connected with the negative electrode of the battery; the first field effect transistor, the second field effect transistor, the fourth field effect transistor and the fifth field effect transistor are all N-channel enhanced MOS transistors; the third field effect transistor, the sixth field effect transistor and the seventh field effect transistor are all P-channel enhanced MOS transistors.

2. A monitoring system according to claim 1, wherein the pressure switch module comprises: a resistor R1, a resistor R2, a stress button and a capacitor; one end of the resistor R2 is connected with the anode of the battery, the other end of the resistor R2 is connected with the anode of the capacitor after being connected with the normally closed contact of the stress button in series, the anode of the capacitor is connected with the normally open contact of the stress button and the resistor R1 in series and then is connected with the cathode of the capacitor, and the cathode of the capacitor is connected with the cathode of the battery; and a gate of a seventh field effect transistor and the A/D input of the temperature and humidity acquisition module are respectively connected to connecting wires of a normally closed contact of the stressed button and the resistor R2 through leads.

3. The monitoring system according to claim 1, wherein the temperature and humidity acquisition module comprises a temperature and humidity detection processing control unit, a wireless transceiver unit, a temperature sensor, a humidity sensor, a high-frequency antenna, an indicator light and a vibration sensor; the temperature and humidity detection processing control unit is sequentially connected with the wireless transceiving unit and the high-frequency antenna in series and then is connected with the information transceiving control terminal in a wireless mode; the temperature and humidity detection processing control unit is connected with a temperature sensor, a humidity sensor, a vibration sensor, a pressure switch module and a battery charging module in an input mode; the output of the temperature and humidity detection processing control unit is connected with a grid and an indicator light of a fourth field effect tube; the vibration sensor is connected with the input interruption of the temperature and humidity detection processing control unit; the pressure switch module is connected with the A/D input of the temperature and humidity detection processing control unit.

4. A monitoring system according to claim 2, wherein the capacitor is a tantalum capacitor or a niobium capacitor.

5. A monitoring system according to claim 2, wherein the force button is a two-way contact switch, one of which is normally open and the other of which is normally closed.

6. A method for implementing a monitoring system according to any one of claims 1 to 4, characterized in that it comprises the following steps:

the method comprises the steps that when an information receiving and transmitting control terminal outputs routing inspection control information to an excitation/charging source module, an excitation signal is sent out, and an electric work of a temperature and humidity acquisition module in a granary temperature and humidity monitoring unit is excited;

secondly, when the information transceiving control terminal outputs charging control information to the excitation/charging source module, a charging signal is sent out, and batteries in the granary temperature and humidity monitoring unit are charged wirelessly;

thirdly, when the temperature and humidity acquisition module in the granary temperature and humidity monitoring unit monitors that the output of the pressure switch module is less than or equal to one third of the voltage of the battery terminal through the A/D port, the granary is judged to be turned over or grain is put or grain is stolen, and the uploading pressure switch module outputs information to the information transceiving control terminal:

when the time period is set as a grain discharging time period or a grain turning time period, returning a grain turning/discharging identification code to a corresponding granary temperature and humidity monitoring unit, and when the time period is set as the grain turning time period, performing grain turning quality judgment: the quality of the turned grain is judged according to the sum of the quantity of output information sent by the grain temperature and humidity monitoring units which are put into the grain stack from the time period setting to the current time and the proportion of the sum of the quantity of the output information in the total quantity of the grain temperature and humidity monitoring units which are arranged in the grain stack, the higher the proportion of the output information is, the better the quality of the turned grain is judged, otherwise,

when the time period is set as an anti-theft time period, the anti-theft identification code is transmitted back to the corresponding granary temperature and humidity monitoring unit, the theft alarm prompt is carried out, and the alarm level is set according to the sum of the quantity of output information sent by the granary temperature and humidity monitoring unit placed in the grain stack from the time period setting to the current time period, wherein the larger the sum of the quantity is, the more the alarm times are, the higher the management level of the upward alarm layer by layer is, and the reverse is true.

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