CN107734791A - LED light group control method, device, LED advisement lamp case and control system - Google Patents

Abstract

The invention discloses a method for controlling an LED lamp group. The method comprises the following steps: receiving the current ambient light intensity value sent by a photosensitive sensor; reading the current ambient light intensity set value from a second controller; setting the current ambient light intensity The fixed value is read by the second controller from the touch screen; when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity set value is greater than the preset threshold value, the PWM modulation technology is used to adjust the output duty cycle of the drive power supply Control the light intensity of the LED lamp group. By applying the technical solutions provided by the embodiments of the present invention, the PWM modulation technology can be used to adjust the output duty ratio of the driving power supply to control the light intensity of the LED lamp group according to the current ambient light intensity value. The waste of power resources is reduced, and the comfort of people watching the light box is improved. The invention also discloses an LED light group control device, an LED advertising light box and a control system, which have corresponding technical effects.

Description

LED light group control method, device, LED advertising light box and control system

technical field

The invention relates to the technical field of LED lighting, in particular to an LED lamp group control method and device, an LED advertising light box and a control system.

Background technique

With the development of LED lighting technology and the in-depth implementation of my country's energy-saving and emission-reduction policies, LED, as a new light source in the 21st century with high efficiency, energy saving, safety, durability, and low-carbon environmental protection, relies on its unique advantages. places are widely used. Among them, the LED advertising light box with media communication characteristics has been widely used because of its pleasing advertising content, which can beautify the environment, decorate the city night scene well, and has good media communication characteristics, and has become a beautiful landscape of the city. .

However, the LED advertising light boxes in the prior art have some unsatisfactory aspects in terms of control. Existing LED advertising light boxes usually adopt the method of loop power off to simply control the overall circuit. This control method has some disadvantages. The light intensity of the LED light set is certain. When the ambient light is strong during the day, it is not necessary for the light intensity of the LED light set to be very strong, and people can clearly see what the advertising media wants. The content of the advertisement to be promoted, and the light-sensing comfort of the human eye will change with the light intensity of the luminous object, thus causing unnecessary waste of power resources and discomfort for people watching the light box.

Contents of the invention

In order to solve the above technical problems, the present invention provides the following technical solutions:

A method for controlling an LED lamp group, the method comprising:

The first controller receives the current ambient light intensity value sent by the photosensitive sensor;

Reading the current ambient light intensity setting value from the second controller; wherein, the current ambient light intensity setting value is read by the second controller from the touch screen;

judging whether the difference between the current ambient light intensity value and the current ambient light intensity set value is greater than a preset threshold;

If so, the PWM modulation technology is used to adjust the output duty cycle of the driving power supply to control the light intensity of the LED lamp group.

In a specific embodiment of the present invention, it also includes:

Receiving the power parameter of the LED light group sent by the data collector;

Analyzing the electrical parameter to obtain an analysis result;

Send the analysis result to the host computer through the second controller;

receiving the processing instruction selected by the management personnel sent by the touch screen according to the analysis result displayed by the host computer;

According to the processing instruction, it is judged whether to activate the standby LED lamp group.

A control device for an LED lamp group, the device comprising:

The ambient light intensity value receiving module is used to receive the current ambient light intensity value sent by the photosensitive sensor;

A set value reading module, configured to read from the second controller the current ambient light intensity set value read by the second controller from the touch screen;

The light intensity control module of the LED lamp group is used to judge whether the difference between the current ambient light intensity value and the current ambient light intensity set value is greater than a preset threshold, and if so, use PWM modulation technology to adjust the output of the driving power supply The duty ratio controls the light intensity of the LED lamp group.

An LED advertising light box, comprising:

A first power supply, a first controller, a driving power supply and a photosensitive sensor respectively connected to the first controller, and an LED lamp group connected to the driving power supply;

The photosensitive sensor collects the current ambient light intensity value; sends the current ambient light intensity value to the first controller;

The first controller receives the current ambient light intensity value; reads the current environmental setting value read by the second controller from the touch screen from the second controller of the total control cabinet; judges the Whether the difference between the current ambient light intensity value and the current ambient setting value is greater than the preset threshold value, if so, use PWM modulation technology to adjust the output duty cycle of the driving power supply to adjust the light intensity of the LED lamp group control;

The first power supply provides electric energy for the LED advertising light box.

In a specific embodiment of the present invention, it also includes a data collector and an LED standby lamp group;

The data collector collects the power parameter of the LED lamp group; sends the power parameter to the first controller;

The first controller is also used to receive the power parameter; analyze the power parameter to obtain an analysis result; send the analysis result to the host computer through the second controller; receive the touch screen The processing instruction selected by the management personnel according to the analysis result displayed by the host computer; according to the processing instruction, it is judged whether to start the standby LED lamp group.

In a specific embodiment of the present invention, it also includes:

The first communication component connected to the first controller is used for communication between the first controller and the second controller.

In a specific implementation manner of the present invention, the first communication component is a ZigBee wireless data transmission communication component.

A LED advertising light box control system, said system comprising:

As mentioned above, the LED advertising light box, the general control cabinet connected to the LED advertising light box, and the touch screen connected to the general control cabinet; the general control cabinet includes a second controller and a second power supply;

The touch screen is used for managers to preset the current ambient light intensity setting value on the touch screen;

The second controller reads the set value of the current ambient light intensity in the touch screen;

The second power supply provides power for the general control cabinet.

In a specific embodiment of the present invention, it also includes a host computer connected to the general control cabinet;

The upper computer receives and displays the analysis result obtained after analyzing the power parameters of the LED lamp group sent by the first controller through the second controller;

The touch screen is also used for the manager to select a processing instruction according to the analysis result; and send the processing instruction to the corresponding first controller through the second controller.

In a specific embodiment of the present invention, the general control cabinet also includes:

The second communication component connected with the second controller is used for the second controller to communicate with the first controller, the host computer and the touch screen.

Applying the technical solution provided by the embodiment of the present invention, the first controller receives the current ambient light intensity value sent by the photosensitive sensor, reads the current ambient light intensity setting value from the second controller, and judges the difference between the current ambient light intensity value and the current ambient light intensity value. Whether the difference of the ambient light intensity setting value is greater than the preset threshold value, if yes, the PWM modulation technology is used to adjust the output duty cycle of the driving power supply to control the light intensity of the LED lamp group. The first controller receives the current ambient light intensity value sent by the photosensitive sensor, and when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity setting value is greater than the preset threshold value, the PWM modulation technology is used to adjust the output ratio of the drive power supply. The space ratio controls the light intensity of the LED lamp group. The light intensity of the LED lamp group can be controlled according to the current ambient light intensity, which reduces the waste of power resources and improves the comfort of people watching the light box.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is an implementation flow chart of a method for controlling an LED lamp group in an embodiment of the present invention;

2 is a coordinate diagram of the relationship between the output duty ratio of a driving power supply and the light intensity of the LED lamp group in an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of an LED lamp group control device in an embodiment of the present invention;

4 is a schematic structural view of an LED advertising light box in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of an LED advertising light box control system in an embodiment of the present invention.

detailed description

In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1, it is an implementation flowchart of a method for controlling an LED lamp group in an embodiment of the present invention, and the method may include the following steps:

S101: The first controller receives the current ambient light intensity value sent by the photosensitive sensor.

A photosensitive sensor can be installed in the external environment where the LED lamp group is located. The photosensitive sensor collects the current ambient light intensity value of the external environment where the LED lamp group is located, and sends the collected current ambient light intensity value of the external environment to the first A controller, the first controller receives the current ambient light intensity value.

The photoresistor in the photosensitive sensor can sense the light and dark changes of light and output a weak electrical signal. Through simple electronic circuit amplification processing, the optical signal can be converted into a standard electrical signal, such as generally 4-20mA/1-5VDC.

The first controller is the core control part of the LED light group, which is composed of a hardware circuit part and a software driver control part. Specifically, it can be a 32-bit microprocessor controller. This embodiment of the present invention does not limit it, and the specific one can be based on actual conditions. situation to choose.

The first power supply can also be deployed to provide power support for each part. The first power supply can provide a direct current of 0-250V, which is not limited in the present invention, and can be adjusted according to actual conditions.

S102: Read the current set value of ambient light intensity from the second controller.

The current ambient light intensity setting value is read by the second controller from the touch screen.

Due to the existence of various uncertain interference factors in the environment, the ambient light intensity setting values for different time periods of the day under different circumstances can be set according to repeated debugging experiments. For example, the ambient light may be relatively weak in rainy days. Set an ambient light intensity setting value for different time periods in a rainy day, and the ambient light may be stronger in sunny weather, you can set a setting value for the ambient light intensity in different time periods in a sunny day. Managers can pre-set the corresponding ambient light intensity setting values for different time periods on the touch screen HMI of the monitoring center through the touch screen according to the interference factors existing in the environment.

The central position close to each LED light group can be equipped with a general control cabinet, and a second controller is deployed in the general control cabinet. The second controller reads the ambient light intensity settings for different time periods set by the manager through the touch screen Value. The first controller reads the set values of ambient light intensity in different time periods in the second controller.

S103: Determine whether the difference between the current ambient light intensity value and the current ambient light intensity set value is greater than a preset threshold, and if yes, execute step S104.

The threshold value of the difference between the ambient light intensity value and the ambient light intensity set value at the same time can be preset, and when the first controller receives the current ambient light intensity value sent by the photosensitive sensor, it can judge the difference between the current ambient light intensity value and the ambient light intensity value. Whether the difference between the current ambient light intensity setting value is greater than the preset threshold value, if yes, it means that the light intensity of the LED lamp group does not match the current ambient light intensity, and you can continue to step S104, if not, it means that the LED lamp group The light intensity matches the current ambient light intensity value without any adjustment.

S104: Using the PWM modulation technology to adjust the output duty ratio of the driving power supply to control the light intensity of the LED lamp group.

As shown in Figure 2, when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity setting value is greater than the preset value, the PWM modulation technology can be used to adjust the output duty ratio D of the driving power supply to the light intensity of the LED lamp group. Strong I for control. The cycle of the driving power supply is T, and t _on is the duration of the high level of the driving power supply in one cycle. In the four cycles of the driving power supply in Figure 2, the high level time accounts for 55%, 40%, and 30% of the entire cycle respectively. and 15%. t _off is the duration of the low level of the driving power supply in one cycle. I _max is the preset maximum light intensity of the LED lamp group.

The LED lamp group can be composed of many low-power LEDs packaged and molded, and integrated into a circuit board, which is directly controlled by the driving power supply.

A relay protection circuit can be connected between the output circuit of the driving power supply and the LED lamp group to eliminate the arc that may be generated when the contacts operate, thereby protecting the stability of the output circuit of the driving power supply and prolonging its service life.

When the current ambient light intensity value is greater than the current ambient light intensity setting value and the difference between the current ambient light intensity setting value and the current ambient light intensity setting value is greater than the preset threshold, the PWM modulation technology is used to lower the output duty cycle of the driving power supply of the LED lamp group The amount is preset, so that the frequency and magnitude of the power supply current of the driving power supply to the LED lamp group are both reduced, and the light intensity of the LED lamp group is reduced. The use of PWM pulse modulation technology makes the maintenance and management of LED lamps develop in a more intelligent direction.

And the time interval between the preset threshold value and the actual difference value for judging the difference between the ambient light intensity value and the ambient light intensity set value at the same time can be preset in advance. When the preset time interval is reached, the actual ambient light intensity value will be Update, get the updated ambient light intensity value, the ambient light intensity set value will also be updated, get the updated ambient light intensity set value, you can judge whether the updated ambient light intensity value is greater than the updated ambient light intensity set value and is consistent with After the update, the difference of the set value of the ambient light intensity is greater than the preset threshold. If it is, then use the PWM modulation technology to reduce the output duty cycle of the driving power supply of the LED lamp group to a preset amount. If after multiple updates Comparing the ambient light intensity value with the updated ambient light intensity set value, the updated ambient light intensity value is greater than the updated ambient light intensity set value and the difference with the updated ambient light intensity set value is greater than the preset threshold value, In this case, the duty cycle of the driving power supply of the LED lamp group is lowered by a preset amount several times, so as to achieve the effect of precise dimming of the LED lamp group. The minimum light intensity value I _min of the LED lamp group can be preset, and when the light intensity of the LED lamp group reaches the preset minimum light intensity value, even if the ambient light intensity value is greater than the updated ambient light intensity setting value after the update and If the difference between the updated ambient light intensity setting value is greater than the preset threshold value, the output duty cycle of the driving power supply of the LED lamp group is no longer adjusted down.

When the ambient light intensity value is less than the current ambient light intensity setting value of the system and the difference between the current ambient light intensity setting value and the current ambient light intensity setting value is greater than the preset threshold, the PWM modulation technology is used to adjust the output duty cycle of the driving power supply of the LED lamp group. The high preset amount increases both the frequency and magnitude of the power supply current of the driving power supply to the LED lamp, and the light intensity of the LED lamp group increases.

When the preset time interval is reached, it is judged whether the updated ambient light intensity value is less than the updated ambient light intensity set value and the difference with the updated ambient light intensity set value is greater than the preset threshold, and if so, then use PWM The modulation technology then increases the output duty cycle of the driving power supply of the LED lamp group to a preset amount. If the updated ambient light intensity value is compared with the updated ambient light intensity set value after many times, the updated ambient light intensity value are less than the updated ambient light intensity set value and the difference with the updated ambient light intensity set value is greater than the preset threshold, then in this case, the duty cycle of the driving power supply of the LED light group will be adjusted multiple times. High preset quota, you can preset the maximum light intensity I _max of the LED light group, when the light intensity of the LED light group reaches the preset maximum light intensity, even if the ambient light intensity value is smaller than the updated ambient light after another update If the set value is stronger and the difference between the updated ambient light intensity set value is greater than the preset threshold, the output duty cycle of the driving power supply of the LED lamp group is no longer adjusted up, so as to ensure the service life of the LED lamp group.

It should be noted that the maximum light intensity of the LED lamp group can be set and adjusted according to the actual situation, which is not limited in the embodiment of the present invention. For example, it can be set to 0.9 times the maximum light intensity that the LED lamp group can achieve, with Guarantee the service life of the LED lamp group.

It should be noted that the time interval may be set and adjusted according to actual conditions, which is not limited in this embodiment of the present invention.

Applying the method provided by the embodiment of the present invention, the first controller receives the current ambient light intensity value sent by the photosensitive sensor, reads the current ambient light intensity setting value from the second controller, and judges the current ambient light intensity value and the current environment Whether the difference of the light intensity setting value is greater than the preset threshold value, if yes, then use the PWM modulation technology to adjust the output duty cycle of the driving power supply to control the light intensity of the LED lamp group. The first controller receives the current ambient light intensity value sent by the photosensitive sensor, and when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity setting value is greater than the preset threshold value, the PWM modulation technology is used to adjust the output ratio of the drive power supply. The space ratio controls the light intensity of the LED lamp group. The light intensity of the LED lamp group can be controlled according to the current ambient light intensity, which reduces the waste of power resources and improves the comfort of people watching the light box.

In a specific embodiment of the present invention, the method may also include the following steps:

Step 1: Receive the power parameters of the LED light group sent by the data collector;

Step 2: Analyze the power parameters and obtain the analysis results;

Step 3: Send the analysis result to the host computer through the second controller;

Step 4: Receive the processing instruction selected by the management personnel sent by the touch screen according to the analysis results displayed on the host computer;

Step 5: According to the processing instruction, judge whether to activate the standby LED light group.

For convenience of description, the above five steps may be combined for description.

A data collector may be deployed in the LED advertising light box to collect power parameters of the LED light group, and send the collected power parameters to the first controller. The first controller receives the power parameter of the LED light group sent by the data collector, analyzes the power parameter, obtains the analysis result, and sends the analysis result to the second controller. After the second controller receives the analysis results, it sends the analysis results to the upper computer in the monitoring center, so that the management personnel can monitor the operation of the LED light group according to the analysis results displayed on the upper computer, and select the corresponding button on the touch screen of the monitoring center. processing instructions.

In the LED advertising light box, LED spare light sets can be deployed. The composition of the spare light sets is the same as that of the LED light sets. The spare light sets can include multiple LED light sets and are directly controlled by the driving power supply. When the LED light set is working normally, the spare light set is in the stop operation state. When the LED light set is damaged or fails to work normally, the spare light set will be started to provide lighting for the LED advertising light box.

A fault alarm mechanism circuit can be set in the data collector. Once the power parameters of the LED lamp group and the standby lamp group are abnormal, the LED lamp group is damaged, and the backup lamp group fails to start normally, a system failure occurs. The fault alarm mechanism circuit is detected When a fault signal is received, the fault signal is sent to the first controller, and the first controller sends the fault signal to the general control cabinet. After the second controller in the general control cabinet judges the fault alarm type and fault alarm address, it can send The fault signal is sent to the monitoring center. At this time, the alarm signal of the monitoring center sounds. At the same time, the host computer will display the type of the fault alarm signal and the specific address of the fault in detail. The management personnel can make corresponding processing according to the specific situation. .

When the upper computer shows that there is a fault in the LED light group, the management personnel can start the spare LED light group when it is confirmed that the LED light group is faulty by checking. It solves the problem that LED light sets are placed in large quantities in various cities, and the range is large and the distribution is extremely random. If any LED light sets are damaged, they cannot be repaired in time, and at the same time, it is inconvenient for maintenance and management for advertising media operators.

The data collector may be a highly integrated circuit chip capable of collecting high-precision power parameters, wherein the power parameters may include voltage, current, power factor, and the like.

Corresponding to the above method embodiment, the embodiment of the present invention also provides an LED lamp group control device, and the LED lamp group control device described below and the LED lamp group control method described above can be referred to in correspondence.

Referring to Figure 3, the device may include:

The ambient light intensity value receiving module 301 is used to receive the current ambient light intensity value sent by the photosensitive sensor;

The set value reading module 302 is used to read from the second controller the current ambient light intensity set value read by the second controller from the touch screen;

The LED lamp group light intensity control module 303 is used to judge whether the difference between the current ambient light intensity value and the current ambient light intensity set value is greater than a preset threshold value, and if so, use PWM modulation technology to adjust the output duty cycle of the driving power supply Control the light intensity of the LED lamp group.

Applying the device provided by the embodiment of the present invention, the first controller receives the current ambient light intensity value sent by the photosensitive sensor, reads the current ambient light intensity setting value from the second controller, and judges the current ambient light intensity value and the current environment Whether the difference of the light intensity setting value is greater than the preset threshold value, if yes, then use the PWM modulation technology to adjust the output duty cycle of the driving power supply to control the light intensity of the LED lamp group. The first controller receives the current ambient light intensity value sent by the photosensitive sensor, and when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity setting value is greater than the preset threshold value, the PWM modulation technology is used to adjust the output ratio of the drive power supply. The space ratio controls the light intensity of the LED lamp group. The light intensity of the LED lamp group can be controlled according to the current ambient light intensity, which reduces the waste of power resources and improves the comfort of people watching the light box.

In a specific embodiment of the present invention, the device may also include the following modules:

The parameter receiving module is used to receive the power parameter of the LED light group sent by the data collector;

The result obtaining module is used to analyze the power parameters and obtain the analysis results;

The result sending module is used to send the analysis result to the host computer through the second controller;

The instruction receiving module is used to receive the processing instruction selected by the management personnel sent by the touch screen according to the analysis result displayed by the host computer;

The lamp group startup judging module is used to judge whether to start the standby LED lamp group according to the processing instruction.

Corresponding to the above method embodiment, the embodiment of the present invention also provides an LED advertising light box. The LED advertising light box described below and the LED light group control method described above can be referred to in correspondence.

Referring to Figure 4, the LED advertising light box can include:

A first power supply 401, a first controller 402, a driving power supply 403 and a photosensitive sensor 404 connected to the first controller 402, and an LED lamp group 405 connected to the driving power supply 403;

The photosensitive sensor 404 collects the current ambient light intensity value; sends the current ambient light intensity value to the first controller 402;

The first controller 402 receives the current ambient light intensity value; reads the current environment setting value that the second controller reads from the touch screen from the second controller of the total control cabinet; judges the current ambient light intensity value and the current Whether the difference of the environment setting value is greater than the preset threshold value, if so, then use the PWM modulation technology to adjust the output duty ratio of the driving power supply 403 to control the light intensity of the LED lamp group 405;

The first power supply 401 provides electric energy for the LED advertising light box.

The LED light group 405 is the light source part of the LED advertising light box.

Applying the LED advertising light box provided by the embodiment of the present invention, the first controller receives the current ambient light intensity value sent by the photosensitive sensor, reads the current ambient light intensity set value from the second controller, and judges the current ambient light intensity value and Whether the difference of the current ambient light intensity setting value is greater than the preset threshold value, if yes, the PWM modulation technology is used to adjust the output duty ratio of the driving power supply to control the light intensity of the LED lamp group. The first controller receives the current ambient light intensity value sent by the photosensitive sensor, and when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity setting value is greater than the preset threshold value, the PWM modulation technology is used to adjust the output ratio of the drive power supply. The space ratio controls the light intensity of the LED lamp group. The light intensity of the LED lamp group can be controlled according to the current ambient light intensity, which reduces the waste of power resources and improves the comfort of people watching the light box.

In a specific embodiment of the present invention, the LED advertising light box may also include a data collector and an LED spare light group;

The data collector collects the power parameter of the LED lamp group 405; sends the power parameter to the first controller 402;

The first controller 402 is also used to receive power parameters; analyze the power parameters to obtain analysis results; send the analysis results to the host computer through the second controller; the management personnel who receive the touch screen to select according to the analysis results displayed on the host computer processing instructions; according to the processing instructions, it is judged whether to activate the standby LED light group.

In a specific embodiment of the present invention, the LED advertising light box may also include:

The first communication component connected to the first controller 402 is used for communication between the first controller 402 and the second controller.

In a specific implementation manner of the present invention, the first communication component is a ZigBee wireless data transmission communication component.

Since each LED advertising light box is relatively close to the general control cabinet, a ZigBee wireless data transmission communication component can be selected for the first controller 402 in the LED advertising light box to communicate with the second controller in the general control cabinet.

The networking of ZigBee wireless data transmission communication components is simple. When the second controller sends the data collection command, the ZigBee network can quickly transmit the command to the first controller 402, and the first controller 402 can quickly collect the data in time. The data can be uploaded to the second controller, which overcomes the shortcoming of poor real-time data collection in the past. ZigBee wireless data transmission communication components can use micro-power wireless data transmission communication terminal JY-RF4100, which is embedded with SimpliciTI software protocol stack, 4 analog inputs, RS232/RS485 dual serial ports, supports Modbus and custom protocols, and adopts industrial frequency 433MHz Advanced low-frequency band design, internal and external expansion power amplifier, low-frequency anti-interference and strong penetration performance make the ZigBee wireless data transmission communication components the longest transmission distance up to 4-6KM, thus ensuring the short-distance wireless communication of the LED advertising light box control system.

It should be noted that the embodiment of the present invention does not limit the selection of ZigBee wireless data transmission communication components, and other models other than the above models can also be used, as long as the purpose of the embodiment of the present invention can be achieved.

In a specific embodiment of the present invention, the LED advertising light box may also include:

The data collector connected to the first controller 402, the LED lamp group 405 and the spare LED lamp group respectively collects the power parameter of the LED lamp group 405 and the spare LED lamp group.

Corresponding to the above method embodiments, the embodiment of the present invention also provides an LED advertising light box control system, and the LED advertising light box control system described below and the LED light group control method described above can be referred to in correspondence.

Referring to Figure 5, the system can include:

The LED advertising light box 510 as mentioned above, the general control cabinet 520 connected to the LED advertising light box 510, the touch screen 530 connected to the general control cabinet 520; the general control cabinet 520 includes a second controller 521 and a second power supply 522;

Touch screen 530, used for managers to preset the current ambient light intensity setting value;

The second controller 521 reads the current ambient light intensity setting value in the touch screen 530;

The second power supply 522 provides power for the general control cabinet 520 .

Managers can control the switch of each LED advertising light box 510 through the touch screen 530, so as to control the operation of the LED advertising light box 510 more precisely, and realize humanized safety management.

The second power supply 522 can provide a DC power supply of 0-250V, which is not limited in the embodiment of the present invention, and can be adjusted according to actual conditions.

Applying the system provided by the embodiment of the present invention, the first controller receives the current ambient light intensity value sent by the photosensitive sensor, reads the current ambient light intensity setting value from the second controller, and judges the current ambient light intensity value and the current environment Whether the difference of the set value of the light intensity is greater than the preset threshold value, if yes, the PWM modulation technology is used to adjust the output duty ratio of the driving power supply to control the light intensity of the LED lamp group. The first controller receives the current ambient light intensity value sent by the photosensitive sensor, and when it is judged that the difference between the current ambient light intensity value and the current ambient light intensity setting value is greater than the preset threshold value, the PWM modulation technology is used to adjust the output ratio of the drive power supply. The space ratio controls the light intensity of the LED lamp group. The light intensity of the LED lamp group can be controlled according to the current ambient light intensity, which reduces the waste of power resources and improves the comfort of people watching the light box.

In a specific embodiment of the present invention, the system may also include a host computer connected to the main control cabinet 520;

The upper computer receives and displays the analysis result obtained after analyzing the power parameter of the LED lamp group 405 sent by the first controller 402 through the second controller 521;

The touch screen 530 is also used for managers to select processing instructions according to the analysis results; and to send the processing instructions to the corresponding first controller 402 through the second controller 521 .

In a specific embodiment of the present invention, the general control cabinet 520 may also include:

The second communication component connected to the second controller 521 is used for the second controller 521 to communicate with the first controller 402 , the upper computer and the touch screen 530 .

In a specific embodiment of the present invention, the second communication component includes a GPRS wireless communication component and a ZigBee wireless data transmission communication component.

The second communication component includes a GPRS wireless communication component and a ZigBee wireless data transmission communication component. Since the total control cabinet 520 is far away from the monitoring center, the total control cabinet 520 communicates with the monitoring center through the GPRS wireless data transmission communication component. Since the main control cabinet 520 is relatively close to each LED advertising light box 510, a ZigBee wireless data transmission communication component is selected for communicating with each LED advertising light box 510.

The GPRS wireless communication component and the ZigBee wireless data transmission communication component complement each other to realize the two-way wireless transmission and reception function of data, which solves the problem of transmission distance in the communication technology of the LED advertising light box 510 control wireless system, and realizes the remote wireless communication of the LED advertising light box 510. Intelligent control facilitates the effective management of advertising media operators and reduces operating costs.

The GPRS wireless communication component can adopt GTM900B, which supports AT command set, embedded TCP/IP protocol, supports wireless packet service, and is suitable for long-distance wireless communication of the present invention.

It should be noted that the embodiment of the present invention does not limit the selection of GPRS wireless communication components, and other models other than the above-mentioned models can also be used, as long as the purpose of the embodiment of the present invention can be achieved.

In a specific implementation manner of the present invention, the second controller 521 is an embedded system board.

The second controller 521 is the core of the entire system. The second controller 521 transmits data information to the host computer in real time and is controlled by the instructions of the touch screen 530. The second controller 521 controls the first LED advertising light box 510 Operation of Controller 402 . The second controller 521 can be an embedded Linux system board, which is a control system based on ARM9 chip and Linux2.6 platform, and provides hardware resources and ports of multiple external devices for the motion system. The model of the embedded Linux system board of the second controller 521 is JZ2440V3.0, and its ARM9 chip is developed by Samsung Company SAMSUNG, and the chip model is S3C2240.

It should be noted that the embodiment of the present invention does not limit the model of the second controller 521 , and other models may also be used, as long as the purpose of the embodiment of the present invention can be achieved.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other. As for the LED lamp group control device, LED advertising light box and control system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the related parts can be referred to the description of the method part.

Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the possible Interchangeability, in the above description, the components and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention, and the descriptions of the above embodiments are only used to help understand the technical solutions and core ideas of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

1. a kind of LED light group control method, it is characterised in that methods described includes：

First controller receives the current environment light intensity value that light sensor is sent；

Current environment light intensity setting value is read from second controller；Wherein, the current environment light intensity setting value is described the What two controllers were read from touch-screen；

Judge whether the current environment light intensity value and the difference of the current environment light intensity setting value are more than predetermined threshold value；

If it is, the output duty cycle that driving power is adjusted using PWM modulation technology is controlled to the light intensity of LED light group.

2. according to the method for claim 1, it is characterised in that also include：

Receive the electrical parameter for the LED light group that data acquisition unit is sent；

The electrical parameter is analyzed, obtains analysis result；

The analysis result is sent to host computer by the second controller；

The processing for receiving the analysis result selection that the administrative staff that the touch-screen is sent show according to the host computer refers to Order；

According to the process instruction, judge whether to start standby LED light group.

3. a kind of LED light group control device, it is characterised in that described device includes：

Ambient light intensity values receiving module, for receiving the current environment light intensity value of light sensor transmission；

Setting value read module, work as reading the second controller from the second controller from what touch-screen was read Preceding environmental light intensity setting value；

LED light group intensity control module, for judging the current environment light intensity value and the current environment light intensity setting value Whether difference is more than predetermined threshold value, if it is, adjusting the output duty cycle of driving power to LED using PWM modulation technology The light intensity of group is controlled.

A kind of 4. LED advisement lamp case, it is characterised in that including：

First power supply, the first controller, the driving power being connected respectively with first controller and light sensor, with it is described The connected LED light group of driving power；

The light sensor, gather current environment light intensity value；The current environment light intensity value is sent to first control Device；

First controller, receive the current environment light intensity value；Described is read from the second controller of master control cabinet The current environment setting value that two controllers are read from touch-screen；Judge the current environment light intensity value and the current environment Whether the difference of setting value is more than predetermined threshold value, if it is, the output that the driving power is adjusted using PWM modulation technology is accounted for The light intensity that sky compares the LED light group is controlled；

First power supply, electric energy is provided for LED advisement lamp case.

5. LED advisement lamp case according to claim 4, it is characterised in that also including data acquisition unit and LED stand-by lamps Group；

The data acquisition unit, gather the electrical parameter of the LED light group；The electrical parameter is sent to first control Device；

First controller, it is additionally operable to receive the electrical parameter；The electrical parameter is analyzed, obtains analysis knot Fruit；The analysis result is sent to host computer by the second controller；Receive the administrative staff that the touch-screen is sent The process instruction that the analysis result shown according to the host computer selects；According to the process instruction, judge whether to start The standby LED light group.

6. LED advisement lamp case according to claim 5, it is characterised in that also include：

The first communication component being connected with first controller, between first controller and the second controller Communication.

7. LED advisement lamp case according to claim 6, it is characterised in that first communication component is that ZigBee is wireless Digital transmission communication component.

8. a kind of LED advisement lamp case control system, it is characterised in that the system includes：

LED advisement lamp case as described in any one of claim 4 to 7, the master control cabinet being connected with the LED advisement lamp case, with The connected touch-screen of the master control cabinet；The master control cabinet includes second controller and second source；

The touch-screen, current environment light intensity setting value is preset on the touch-screen for administrative staff；

The second controller, read the current environment light intensity setting value in the touch-screen；

The second source, power supply is provided for the master control cabinet.

9. system according to claim 8, it is characterised in that also include the host computer being connected with the master control cabinet；

The host computer, receive and show the electricity to LED light group that first controller is sent by the second controller The analysis result that amount parameter obtains after being analyzed；

The touch-screen, it is additionally operable to the administrative staff and process instruction is selected according to the analysis result；By the process instruction Corresponding first controller is sent to by the second controller.

10. system according to claim 9, it is characterised in that the master control cabinet also includes：

The second communication component being connected with the second controller, for the second controller and first controller, institute State host computer and the touch-screen is communicated.