CN114935728A - Oil pump running state detection circuit and detection method - Google Patents

Abstract

The invention discloses an oil pump running state detection circuit and a detection method. The detection circuit comprises: a central processing unit circuit module and an electrical parameter detection circuit module, the electrical parameter detection circuit module is electrically connected with the processor circuit module, and the The electrical parameter detection circuit module includes a first detection circuit and a second detection circuit for detecting the motor when there is no trigger signal, and a third detection circuit for detecting the motor when there is a trigger signal, and the first detection circuit is used for detecting the output voltage of the motor. size, the second detection circuit is used to detect the leakage current, and the third detection circuit is used to detect the electrical parameters of the motor operation. The invention realizes the problem of checking the open circuit or short circuit state of the oil pump circuit and the electric leakage problem of the motor circuit when the oil pump is not working.

Description

A kind of oil pump running state detection circuit and detection method

technical field

The invention relates to the technical field of oil pump detection, in particular to an oil pump operating state detection circuit and a detection method.

Background technique

In the prior art, in the detection of the health status of the oil pump, the existing problems are: 1. The trigger signal of the fuel dispenser is composed of a relay group, which takes up a lot of space, and the AC contactor controls the switch of the oil pump and cannot detect the state of the oil pump; 2. When the oil pump When it is not working, it is impossible to visually find the problem. Professional and tool skills are needed to find out whether the AC contactor is damaged, the oil pump circuit is open or short-circuited, the oil pump is damaged, and the voltage is too high or too low. 3. After the oil pump has been working for a period of time, the oil pump The health status cannot be judged, and it is often repaired after the failure occurs. Affect production after a problem occurs.

SUMMARY OF THE INVENTION

In view of the problems existing in the above-mentioned prior art, the present invention provides an oil pump operating state detection circuit and detection method, which can detect the open circuit or short circuit, high voltage or low voltage of the oil pump circuit without the need for professionals and tools when the oil pump is not working. Various oil pump operating status problems.

The invention provides an oil pump running state detection circuit, comprising: a central processing unit circuit module and an electrical parameter detection circuit module, the electrical parameter detection circuit module is electrically connected with the processor circuit module, and the electrical parameter detection circuit module includes The first detection circuit and the second detection circuit for detecting the motor when there is no trigger signal and the third detection circuit for detecting the motor when there is a trigger signal, the first detection circuit is used for detecting the magnitude of the output voltage of the motor, the second detection circuit The detection circuit is used to detect the leakage current, and the third detection circuit is used to detect the electrical parameters of the motor operation.

In one embodiment, the electrical parameter detection circuit module includes:

Interlock switch K1, one end of the interlock switch K1 is connected to the second output signal end and R20 respectively, the other end of the resistor R20 is connected to the capacitor C4, and the other end of the capacitor C4 is connected to the other end of the interlock switch K1 Then connect one end of the varistor R35, the other end of the varistor R35 is connected to the second output signal end, and the second output signal end is connected to the third input end of the third detection circuit through the first voltage divider circuit ; The other end of the interlock switch K1 is also connected to one end of the motor live wire neutral interface, the other end of the motor live wire neutral interface is connected to one end of the resistor R10, and the other end of the resistor R10 is grounded; the resistor R10 One end of the first output signal terminal is connected to the first output signal terminal, and the first output signal terminal is respectively connected to the first input terminal and the second input terminal of the third detection circuit through the differential signal output by the first differential circuit.

In one embodiment, the third detection circuit includes: a third processor chip U1, the IP pin of the third processor chip U1 is used as the first input terminal of the third detection circuit, and the IN pin is used as the first input terminal of the third detection circuit. The second input terminal of the three detection circuits, the VP pin is used as the third input terminal of the third detection circuit, the VDD pin is connected to the power supply, and the TX pin of the third processor chip U1 outputs the motor running electrical power through the first optocoupler isolation circuit parameter;

The first voltage divider circuit includes resistors R62, R63, R64, R65, R32 and a capacitor C42, one end of the R62 is connected to the second output signal end, the resistors R62, R63, R64, R65 are connected in sequence, and the other end of the R65 is respectively Connect the third input end of the third detection circuit, one end of the resistor R32 and one end of the capacitor C42, and the other end of the R32 and the capacitor C42 is grounded; the first differential circuit includes: resistors R28, R29, capacitors C6, C9, the first differential circuit includes: An output signal terminal is connected to one end of the resistor R29, the other end of the resistor R29 is respectively connected to one end of the capacitor C6 and the first input terminal of the third detection circuit, one end of the resistor R28 is grounded, and the other end of the resistor R28 is connected to the capacitor C9. One end and the second input end of the third detection circuit, and the other ends of the capacitors C6 and C9 are grounded.

In an embodiment, the other end of the interlock switch K1 is connected to a fifth output signal end, and the fifth output signal end is connected to an input end of a first detection circuit, and the first detection circuit includes: a resistor R8, R9, R12, R13, R4, R5, capacitor C3, diodes D1 and D2, the fifth output signal terminal is connected to one end of resistor R8, R8, R9, R12, R13 are connected in sequence, and the other end of resistor R13 is connected to diode D1 respectively The cathode of the diode D2, the anode of the diode D2, one end of the capacitor C3 and one end of the resistor R4, the other end of the resistor R13 is input to an input end of the second optocoupler isolation circuit, the anode of the diode D1, the cathode of the diode D2, the capacitor C3 The other end of the resistor R4 and the other end of the resistor R4 are grounded, and the other end of the resistor R4 is input to the other input end of the second optocoupler isolation circuit through R5.

In one embodiment, a magnetic ring is provided on the neutral wire of the live wire of the motor, and the differential signals output by the first output end and the second output end of the magnetic ring after passing through the second differential circuit are respectively connected to the first output terminal of the second detection circuit. An input terminal and a second input terminal, the second detection circuit includes a second processor chip U4, the IP pin of the second processor chip U4 is used as the first input terminal of the second detection circuit, and the IN pin is used as the first input terminal of the second detection circuit. The second input terminal of the second detection circuit, the VP pin is used as the third input terminal of the second detection circuit, and the VP pin of the second processor chip is connected to one end of the capacitor C3; The TX pin outputs leakage current data through the third optocoupler isolation circuit;

The second differential circuit includes resistors R20, R21, R22, capacitors C1, and C2. The first output end of the magnetic ring is connected to one end of the resistors R20 and R21, respectively, and the other end of the resistor R20 is connected to one end of the capacitor C1, respectively. and the first input end of the second detection circuit; the second input end of the magnetic ring is respectively connected to the other end of the resistor R21 and one end of the resistor R22, the second input end of the magnetic ring is grounded, and the other end of the resistor R22 is connected to the ground. One end is respectively connected to one end of the capacitor C2 and the second input end of the second detection circuit, and the other ends of the C1 and C2 are grounded.

In an embodiment, the above-mentioned oil pump operating state detection circuit further includes a motor switch safety control circuit module electrically connected to the processor circuit module, the motor switch safety control circuit module is connected with the electrical parameters The detection circuit module is connected, and the motor switch safety control circuit module is used for realizing arc extinguishing of the relay switch during the motor switching process.

In an embodiment, the above-mentioned oil pump operating state detection circuit further includes an input detection circuit module electrically connected to the processor circuit module, the input detection circuit module includes at least one input detection circuit, and the input detection circuit module includes at least one input detection circuit. The input detection circuit includes: a trigger signal interface, a diode D7, resistors R8, R16, R41, and a fourth optocoupler isolation circuit. The first output end of the trigger signal interface is connected to the anode of the diode D7, and the cathode of the diode D7 is connected to the resistor. R8 is then connected to one input end of the fourth optocoupler isolation circuit, and the second output end of the trigger signal interface is connected to the resistors R16 and R41 in sequence and then connected to the other input end of the fourth optocoupler isolation circuit. The output signal of the optocoupler isolation circuit is transmitted to the central processing unit circuit module.

In an embodiment, the above-mentioned oil pump operating state detection circuit further includes an oil pump pressure detection and compensation circuit module electrically connected to the processor circuit module, and the oil pump pressure detection and compensation circuit module includes: a pressure Transmitter, fuse F1, fuse F3, diode D18, diode D6, Zener diode D12, inductor L3, capacitor C19, resistors R22, R23, the second output end of the pressure transmitter is connected to one end of the fuse F1, the fuse The other end of F1 is connected to the cathode of the diode D18, the anode of the diode D18 is connected to the power supply, the first output end of the pressure transmitter is connected to one end of the fuse F3, and the other end of the fuse F3 is connected to the Zener diode D12 and one end of the inductor L3 respectively , the other end of the Zener diode D12 is grounded, the other end of the inductor L3 is connected to one end of the resistors R22 and R23 respectively, the other end of the resistor R22 is grounded, and the other end of the resistor R23 is connected to the diode D6 and the capacitor respectively. One end of C19, the other end of the diode D6 is connected to the power supply, the other end of the capacitor C19 is grounded, and the other end of the resistor R23 simultaneously outputs the oil pump pipeline pressure data.

The present invention also provides a method for detecting the operating state of an oil pump based on the above-mentioned detection circuit, comprising: the third processor chip U1 in the third detection circuit of the electrical parameter detection circuit module obtains the operating voltage and current of the motor respectively, and passes The third processor chip U1 calculates the operating power and power consumption data of the motor;

Based on the first input terminal and the second input terminal of the second processor chip U4 in the second detection circuit of the electrical parameter detection circuit module, the voltage signal of the magnetic ring on the neutral wire and live wire of the motor is collected, and based on the second processor chip U4 The collected voltage signal is analyzed and calculated to obtain the motor leakage current data;

The first detection circuit based on the electrical parameter detection circuit module collects the motor output voltage when there is no trigger signal, and detects whether the motor circuit is short-circuited or open-circuited by calculating and analyzing the output voltage data.

In one embodiment, the oil pump operating state detection method further includes:

Based on the oil pump pipeline pressure data output by the oil pump pressure detection and compensation circuit module, when the oil engine pump stops working, analyze whether the pressure reduction time is less than the first preset value, and if so, issue an alarm to indicate that the pipeline is not sealed;

It also includes analyzing whether the real-time pipeline pressure is less than the second preset value based on the oil pump pipeline pressure data output by the oil pump pressure detection and compensation circuit module, and if so, automatically starting the oil pump to supplement the pressure.

An oil pump operating state detection circuit and detection method of the present invention have the following beneficial effects:

In the prior art, when the oil pump is not working, the problem cannot be found intuitively. Professional and tool skills are needed to find out whether the AC contactor is damaged, the oil pump circuit is open or short-circuited, the oil pump is damaged, and the voltage is too high or too low. Defects, the present invention designs a first detection circuit to detect the magnitude of the output voltage of the motor. By detecting the magnitude of the output voltage of the motor when there is no trigger signal, it is determined whether the oil pump circuit is open, short-circuited or connected to a normal state. At the same time, a second detection circuit is designed. The detection circuit is used to detect the leakage current of the motor. Realize the open circuit or short circuit of the oil pump circuit, the oil pump damage, the high or low voltage, the current when the oil pump is running, the current when the oil pump is blocked, the oil pump is overloaded when the voltage is too high, and the power is insufficient when the voltage is too low. Detect abnormal operation, etc.

Description of drawings

1 is an overall structural diagram of an oil pump operating state detection circuit provided by an embodiment of the present application;

2 is a circuit diagram of an electrical parameter detection circuit module in an oil pump operating state detection circuit provided by an embodiment of the present application;

3 is a circuit diagram of an input detection circuit module in an operating state detection circuit of an oil pump provided by an embodiment of the present application;

4 is a circuit diagram of an oil pump pressure detection and compensation circuit module in an oil pump operating state detection circuit provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. All other embodiments obtained under the premise of creative work fall within the protection scope of the present invention.

1-4, an embodiment of the present application provides an oil pump operating state detection circuit, including: a central processing unit circuit module and an electrical parameter detection circuit module, the electrical parameter detection circuit module is electrically connected with the processor circuit module, The electrical parameter detection circuit module includes a first detection circuit and a second detection circuit for detecting the motor when there is no trigger signal, and a third detection circuit for detecting the motor when there is a trigger signal, and the first detection circuit is used for detecting the output of the motor The magnitude of the voltage, the second detection circuit is used to detect the leakage current, and the third detection circuit is used to detect the electrical parameters of the motor operation.

In the prior art, when the oil pump is not working, the problem cannot be found intuitively. Professional and tool skills are needed to find out whether the AC contactor is damaged, the oil pump circuit is open or short-circuited, the oil pump is damaged, and the voltage is too high or too low. Defect, in the embodiment of the present application, a first detection circuit is designed to detect the magnitude of the motor output voltage, and by detecting the magnitude of the motor output voltage when there is no trigger signal, it is determined whether the oil pump circuit is open circuit, short circuit or normal connection.

In some embodiments, the above-mentioned electrical parameter detection circuit module includes:

Interlock switch K1, one end of the interlock switch K1 is connected to the second output signal end and R20 respectively, the other end of the resistor R20 is connected to the capacitor C4, and the other end of the capacitor C4 is connected to the other end of the interlock switch K1 Then connect one end of the varistor R35, the other end of the varistor R35 is connected to the second output signal end, and the second output signal end is connected to the third input end of the third detection circuit through the first voltage divider circuit ; The other end of the interlock switch K1 is also connected to one end of the motor live wire neutral interface, the other end of the motor live wire neutral interface is connected to one end of the resistor R10, and the other end of the resistor R10 is grounded; the resistor R10 One end of the first output signal terminal is connected to the first output signal terminal, and the first output signal terminal is respectively connected to the first input terminal and the second input terminal of the third detection circuit through the differential signal output by the first differential circuit.

In some embodiments, the above-mentioned third detection circuit includes: a third processor chip U1, the IP pin of the third processor chip U1 is used as the first input terminal of the third detection circuit, and the IN pin is used as the third detection circuit The second input terminal of the circuit, the VP pin is used as the third input terminal of the third detection circuit, the VDD pin is connected to the power supply, and the TX pin of the third processor chip U1 outputs the electrical parameters of the motor operation through the first optocoupler isolation circuit;

The first voltage divider circuit includes resistors R62, R63, R64, R65, R32 and a capacitor C42, one end of the R62 is connected to the second output signal end, the resistors R62, R63, R64, R65 are connected in sequence, and the other end of the R65 is respectively Connect the third input end of the third detection circuit, one end of the resistor R32 and one end of the capacitor C42, and the other end of the R32 and the capacitor C42 is grounded; the first differential circuit includes: resistors R28, R29, capacitors C6, C9, the first differential circuit includes: An output signal terminal is connected to one end of the resistor R29, the other end of the resistor R29 is respectively connected to one end of the capacitor C6 and the first input terminal of the third detection circuit, one end of the resistor R28 is grounded, and the other end of the resistor R28 is connected to the capacitor C9. One end and the second input end of the third detection circuit, and the other ends of the capacitors C6 and C9 are grounded.

Among them, the current is sampled by R10, the voltage is sampled at the L terminal, and the third processor chip U1 calculates the voltage, current, power and power consumption of the motor. Specifically, the chip model of the third processor chip U1 is HLW8032.

In some embodiments, the other end of the interlock switch K1 is connected to a fifth output signal end, and the fifth output signal end is connected to an input end of a first detection circuit, and the first detection circuit includes: resistors R8, R9, R12, R13, R4, R5, capacitor C3, diodes D1 and D2, the fifth output signal terminal is connected to one end of the resistor R8, R8, R9, R12, R13 are connected in sequence, and the other end of the resistor R13 is connected to the cathode of the diode D1 respectively , the anode of the diode D2, one end of the capacitor C3 and one end of the resistor R4, the other end of the resistor R13 is input to an input end of the second optocoupler isolation circuit, the anode of the diode D1, the cathode of the diode D2, the other end of the capacitor C3 One end and the other end of the resistor R4 are grounded, and the other end of the resistor R4 is input to the other input end of the second optocoupler isolation circuit through R5.

Specifically, the first detection circuit is used to detect whether there is an open circuit or a short circuit between the motor and the live wire neutral interface of the motor when there is no trigger signal (the live wire neutral interface of the motor is connected to the input and output lines of the motor, not shown in the figure). ), specifically, according to the size of the voltage value V of the fifth output signal terminal, that is, one end of the resistor R8, judge and analyze, when the trigger signal interface of at least one input detection circuit of the input detection circuit module is connected to the trigger signal, the switch K1 When the switch K1 is closed, when the trigger signal interfaces of all the input detection circuits of the input detection circuit module are not connected to the trigger signal, the switch K1 is turned off. R8, R9, R12, R13 are used to divide the voltage output by the fifth output signal terminal, D2 is used to protect the voltage of the chip U4 and prevent the voltage of the chip U4 from being too high, and D2 limits the voltage output to the IN pin of the chip to 0.7 V or so. R4 and R5 are voltage divider sampling resistors. When the motor output terminal is 220V, R4 and R5 are connected in parallel. At this time, the voltage at the input terminal of U4 is:

In one embodiment, when R4=20K, R5=200K, R8=120K, R9=120K, R12=120K, and R13=120K, V _U4 =0.00042V.

When K1 is disconnected, the voltage at the motor output terminal is close to 0. At this time, R5 is disconnected, and only R4 divides the voltage. In one embodiment, the voltage at the motor output terminal is: V*R4/(R8+R9+R12+ R13+R4)=0.04V. The connection and disconnection of R 5 are related to the voltage V of the detection terminal.

When K1 is not closed, the alternating current L is output to the motor interface through R20 and C4. If the motor circuit is open, the voltage measured at this time is the L voltage, and the circuit is judged to be open. When the motor line is short-circuited, the measured voltage is 0, and it is judged that the line is short-circuited. When the motor is normally connected to the motor, the voltage Vm can be calculated by the formula:

Among them, Vm is the motor terminal voltage, ω is the AC angular velocity, L is the motor inductance, C is the capacitance of C4 in the circuit, and R is the resistance of R20 in the circuit. The Vm voltage value is between 0.6 and 2V after actually connecting to the motor.

When measuring the voltage, the resistance value of the resistor divider is selected by the control signal ADV. When ADV is high, the voltage divider value: R4/(R8+R9+R12+R13+R4)=0.04, when ADV is low, the voltage divider value: R5 /(R8+R9+R12+R13+R5)=0.00042. The divided voltage value is input to the U4 chip for measurement. ADV adjusts the voltage divider value according to the currently measured voltage.

In some embodiments, a magnetic ring L2 is provided on the neutral wire of the live wire of the motor, and the differential signals output by the first output terminal and the second output terminal of the magnetic ring L2 after passing through the second differential circuit are respectively connected to the first output terminal of the second detection circuit. An input end and a second input end, the second detection circuit includes a second processor chip U4 (the chip model adopts HLW8032), and the IP pin of the second processor chip U4 is used as the first input of the second detection circuit terminal, the IN pin is used as the second input terminal of the second detection circuit, the VP pin is used as the third input terminal of the second detection circuit, and the VP pin of the second processor chip is connected to one end of the capacitor C3; the The TX pin of the second processor chip outputs leakage current data through the third optocoupler isolation circuit;

The second differential circuit includes resistors R20, R21, R22, capacitors C1, and C2. The first output end of the magnetic ring is connected to one end of the resistors R20 and R21, respectively, and the other end of the resistor R20 is connected to one end of the capacitor C1, respectively. and the first input end of the second detection circuit; the second input end of the magnetic ring is respectively connected to the other end of the resistor R21 and one end of the resistor R22, the second input end of the magnetic ring is grounded, and the other end of the resistor R22 is connected to the ground. One end is respectively connected to one end of the capacitor C2 and the second input end of the second detection circuit, and the other ends of the C1 and C2 are grounded.

Specifically, the neutral line of the output end passes through the magnetic ring L2, and when the currents of the two lines are not parallel, the output voltage is sent to the U4 chip to measure the voltage value, and the leakage current is calculated. Among them, R20, R21, R22 are used to input the input signal after balancing, C1, C2 realize the filtering effect to remove the interference signal.

In some embodiments, the above-mentioned oil pump operating state detection circuit further includes a motor switch safety control circuit module electrically connected to the processor circuit module, the motor switch safety control circuit module and the electrical parameter detection circuit module The motor switch safety control circuit module is used to realize arc extinguishing of the relay switch during the motor switching process.

In some embodiments, the above-mentioned oil pump operating state detection circuit further includes an input detection circuit module electrically connected to the processor circuit module, the input detection circuit module includes at least one input detection circuit, the input detection circuit It includes: a trigger signal interface, a diode D7, resistors R8, R16, R41, and a fourth optocoupler isolation circuit. The first output end of the trigger signal interface is connected to the anode of the diode D7, and the cathode of the diode D7 is connected to the resistor R8 and then connected to one input end of the fourth optocoupler isolation circuit, the second output end of the trigger signal interface is connected to the resistors R16 and R41 in sequence and then connected to the other input end of the fourth optocoupler isolation circuit, the fourth optocoupler isolation circuit The output signal of the circuit is transmitted to the central processing unit circuit module.

Aiming at the problems in the prior art that the trigger signal of the fuel dispenser is composed of a relay group, which takes up a lot of space, and the AC contactor controls the switch of the oil pump and cannot detect the state of the oil pump. When any one of the interfaces IN1, IN2.... has a voltage of 220V, the oil pump starts. Assuming that there are N input detection circuits, there are N output signals T1, T2, ... of the fourth optocoupler isolation circuit. , TN, and input to the CPU at the same time, the CPU detects the output signal of the fourth optocoupler isolation circuit of the T input detection circuits and displays it on the LCD screen, the user can know which port is currently triggered. And you can set the longest trigger time, when it is longer than this time, the device will remind the user that some ports are abnormal.

In some embodiments, the above-mentioned oil pump operating state detection circuit further includes an oil pump pressure detection and compensation circuit module electrically connected to the processor circuit module, and the oil pump pressure detection and compensation circuit module includes: a pressure transmitter , fuse F1, fuse F3, diode D18, diode D6, Zener diode D12, inductor L3, capacitor C19, resistor R22, R23, the second output end of the pressure transmitter is connected to one end of the fuse F1, and the other end of the fuse F1 One end is connected to the cathode of the diode D18, the anode of the diode D18 is connected to the power supply, the first output end of the pressure transmitter is connected to one end of the fuse F3, and the other end of the fuse F3 is connected to the Zener diode D12 and one end of the inductor L3 respectively. The other end of the Zener diode D12 is grounded, the other end of the inductor L3 is connected to one end of the resistors R22 and R23 respectively, the other end of the resistor R22 is grounded, and the other end of the resistor R23 is connected to the diode D6 and one end of the capacitor C19 respectively. , the other end of the diode D6 is connected to the power supply, the other end of the capacitor C19 is grounded, and the other end of the resistor R23 simultaneously outputs the oil pump pipeline pressure data.

Among them, F1 is a resettable fuse, when the current exceeds the preset value, it will turn off the output protection power supply. D18 is a diode to prevent external misconnection from introducing high voltage damage to the equipment, F3 is a resettable fuse to prevent excessive current from damaging the equipment, D12 is a voltage overvoltage protection tube, when the voltage is greater than 5V, it will start protection to lock the voltage at 5V, L3 filter over On high-frequency signal, R22 is for sampling resistance, pressure transmitter is 4-20mA current type output, current flows through R22 to generate voltage, and the voltage is sent to AD for sampling through R23, D6 is AD chip input protection to prevent the input from being in The AD terminal voltage is too high to damage the AD chip.

When the oil engine pump stops working, the preset value of the pressure reduction time will give an alarm, indicating that the pipeline may not be sealed.

When the preset pressure is less than a certain value, the oil pump is automatically started to supplement the pressure. Specifically, when the pipeline pressure drops to a certain value, air will enter the pipeline. At this time, the oil gun switch (which can be understood as the faucet of the water pipe) has not been turned on, and the oil pump is started. If the gun switch is not turned on, the increase of the pipeline pressure will compress the air, the air volume will be reduced, the reduced volume will be filled with oil, and the oil will flow through the flowmeter when the oil is filled, and the flowmeter will have liquid flowing through the flowmeter before the oil gun switch is turned on. , the flowmeter will measure the liquid flowing through. Since the oil gun is not turned on, the flowmeter has measured the value, and the oil machine will display the measured value, which will cause the flowmeter to display the refueling amount just after the oil gun switch is turned on, but in fact The oil does not really start to refuel the user, resulting in inaccurate metering. The oil pump pressure detection and compensation circuit module in the embodiment of the present application realizes that when the pressure drops to a certain value, the oil pump is automatically activated to supplement the pressure to prevent air from entering.

Based on the above-mentioned oil pump operating state detection circuit, an embodiment of the present application provides a method for detecting the operating state of an oil pump, comprising: obtaining the operating voltage and current, and calculate the operating power and power consumption data of the motor through the third processor chip U1;

Based on the first input terminal and the second input terminal of the second processor chip U4 in the second detection circuit of the electrical parameter detection circuit module, the voltage signal of the magnetic ring on the neutral wire and live wire of the motor is collected, and based on the second processor chip U4 The collected voltage signal is analyzed and calculated to obtain the motor leakage current data;

The first detection circuit based on the electrical parameter detection circuit module collects the motor output voltage when there is no trigger signal, and detects whether the motor circuit is short-circuited or open-circuited by calculating and analyzing the output voltage data.

The above method for detecting the running state of the oil pump further includes:

Based on the oil pump pipeline pressure data output by the oil pump pressure detection and compensation circuit module, when the oil engine pump stops working, analyze whether the pressure reduction time is less than the first preset value, and if so, issue an alarm to indicate that the pipeline is not sealed;

It also includes analyzing whether the real-time pipeline pressure is less than the second preset value based on the oil pump pipeline pressure data output by the oil pump pressure detection and compensation circuit module, and if so, automatically starting the oil pump to supplement the pressure.

In the embodiment of the present application, it is further possible to record the number of times the oil water pump is turned on, the running time, and remind maintenance when the preset value is reached. The system automatically stores the average power of each operation, and judges whether the oil pump is in a sub-health state through the curve of the average power, and replaces or repairs it in advance.

The present invention is not limited to the above-mentioned specific embodiments, and various transformations made by those of ordinary skill in the art from the above-mentioned concept without creative work all fall within the protection scope of the present invention.

Claims (10)

1. An oil pump operating state detection circuit is characterized in that, comprising: a central processing unit circuit module and an electrical parameter detection circuit module, the electrical parameter detection circuit module is electrically connected with the processor circuit module, and the electrical parameter detection circuit The module includes a first detection circuit and a second detection circuit for detecting the motor when there is no trigger signal, and a third detection circuit for detecting the motor when there is a trigger signal, the first detection circuit is used for detecting the magnitude of the output voltage of the motor, the The second detection circuit is used to detect the leakage current, and the third detection circuit is used to detect the electrical parameters of the motor operation. 2. An oil pump operating state detection circuit according to claim 1, wherein the electrical parameter detection circuit module comprises: Interlock switch K1, one end of the interlock switch K1 is connected to the second output signal end and R20 respectively, the other end of the resistor R20 is connected to the capacitor C4, and the other end of the capacitor C4 is connected to the other end of the interlock switch K1 Then connect one end of the varistor R35, the other end of the varistor R35 is connected to the second output signal end, and the second output signal end is connected to the third input end of the third detection circuit through the first voltage divider circuit ; The other end of the interlock switch K1 is also connected to one end of the motor live wire neutral interface, the other end of the motor live wire neutral interface is connected to one end of the resistor R10, and the other end of the resistor R10 is grounded; the resistor R10 One end of the first output signal terminal is connected to the first output signal terminal, and the first output signal terminal is respectively connected to the first input terminal and the second input terminal of the third detection circuit through the differential signal output by the first differential circuit. 3. The circuit for detecting an operating state of an oil pump according to claim 2, wherein the third detection circuit comprises: a third processor chip U1, and an IP pin of the third processor chip U1 is used as a The first input terminal of the third detection circuit, the IN pin is used as the second input terminal of the third detection circuit, the VP pin is used as the third input terminal of the third detection circuit, the VDD pin is connected to the power supply, and the third processor chip U1 The TX pin outputs the electrical parameters of motor operation through the first optocoupler isolation circuit; The first voltage divider circuit includes resistors R62, R63, R64, R65, R32 and a capacitor C42, one end of the R62 is connected to the second output signal end, the resistors R62, R63, R64, R65 are connected in sequence, and the other end of the R65 is respectively Connect the third input end of the third detection circuit, one end of the resistor R32 and one end of the capacitor C42, and the other end of the R32 and the capacitor C42 is grounded; the first differential circuit includes: resistors R28, R29, capacitors C6, C9, the first differential circuit includes: An output signal terminal is connected to one end of the resistor R29, the other end of the resistor R29 is respectively connected to one end of the capacitor C6 and the first input terminal of the third detection circuit, one end of the resistor R28 is grounded, and the other end of the resistor R28 is connected to the capacitor C9. One end and the second input end of the third detection circuit, and the other ends of the capacitors C6 and C9 are grounded. 4 . The oil pump operating state detection circuit according to claim 2 , wherein the other end of the interlock switch K1 is connected to a fifth output signal terminal, and the fifth output signal terminal is connected to the first detection circuit. 5 . Input terminal, the first detection circuit includes: resistors R8, R9, R12, R13, R4, R5, capacitor C3, diodes D1 and D2, the fifth output signal terminal is connected to one end of resistor R8, R8, R9, R12 , R13 are connected in sequence, the other end of the resistor R13 is respectively connected to the cathode of the diode D1, the anode of the diode D2, one end of the capacitor C3 and one end of the resistor R4, the other end of the resistor R13 is input to an input of the second optocoupler isolation circuit The anode of the diode D1, the cathode of the diode D2, the other end of the capacitor C3 and the other end of the resistor R4 are grounded, and the other end of the resistor R4 is input to the other input end of the second optocoupler isolation circuit through R5. 5 . The circuit for detecting the operating state of an oil pump according to claim 2 , wherein a magnetic ring is provided on the neutral wire of the live wire of the motor, and the first output end and the second output end of the magnetic ring pass through the second differential circuit. 6 . The differential signal outputted after is connected to the first input terminal and the second input terminal of the second detection circuit respectively, and the second detection circuit includes a second processor chip U4, and the IP pin of the second processor chip U4 is used as The first input terminal of the second detection circuit, the IN pin is used as the second input terminal of the second detection circuit, the VP pin is used as the third input terminal of the second detection circuit, and the VP pin of the second processor chip is connected to One end of the capacitor C3 is connected; the TX pin of the second processor chip outputs leakage current data through the third optocoupler isolation circuit; The second differential circuit includes resistors R20, R21, R22, capacitors C1, and C2. The first output end of the magnetic ring is connected to one end of the resistors R20 and R21, respectively, and the other end of the resistor R20 is connected to one end of the capacitor C1, respectively. and the first input end of the second detection circuit; the second input end of the magnetic ring is respectively connected to the other end of the resistor R21 and one end of the resistor R22, the second input end of the magnetic ring is grounded, and the other end of the resistor R22 is connected to the ground. One end is respectively connected to one end of the capacitor C2 and the second input end of the second detection circuit, and the other ends of the C1 and C2 are grounded. 6 . The oil pump operating state detection circuit according to claim 1 , further comprising a motor switch safety control circuit module electrically connected to the processor circuit module, and the motor switch safety control circuit module is connected to 6 . The electrical parameter detection circuit module is connected, and the motor switch safety control circuit module is used for realizing arc extinguishing of the relay switch during the motor switching process. 7 . The oil pump operating state detection circuit according to claim 1 , further comprising an input detection circuit module electrically connected to the processor circuit module, the input detection circuit module comprising at least one input detection circuit module. 8 . The input detection circuit includes: a trigger signal interface, a diode D7, resistors R8, R16, R41, and a fourth optocoupler isolation circuit. The first output end of the trigger signal interface is connected to the anode of the diode D7, and the diode D7 The negative pole of the trigger signal interface is connected to the resistor R8 and then connected to an input terminal of the fourth optocoupler isolation circuit, and the second output terminal of the trigger signal interface is connected to the resistors R16 and R41 in sequence and then connected to the other input terminal of the fourth optocoupler isolation circuit. The output signal of the fourth optocoupler isolation circuit is transmitted to the central processing unit circuit module. 8 . The oil pump operating state detection circuit according to claim 1 , further comprising an oil pump pressure detection and compensation circuit module electrically connected to the processor circuit module, the oil pump pressure detection and compensation circuit The module includes: pressure transmitter, fuse F1, fuse F3, diode D18, diode D6, Zener diode D12, inductor L3, capacitor C19, resistor R22, R23, the second output end of the pressure transmitter is connected to fuse F1 One end of the fuse F1, the other end of the fuse F1 is connected to the cathode of the diode D18, the anode of the diode D18 is connected to the power supply, the first output end of the pressure transmitter is connected to one end of the fuse F3, and the other end of the fuse F3 is connected to the Zener diode D12 and One end of the inductor L3, the other end of the Zener diode D12 is grounded, the other end of the inductor L3 is connected to one end of the resistors R22 and R23 respectively, the other end of the resistor R22 is grounded, and the other end of the resistor R23 is connected to the One end of the diode D6 and the capacitor C19, the other end of the diode D6 is connected to the power supply, the other end of the capacitor C19 is grounded, and the other end of the resistor R23 simultaneously outputs the oil pump pipeline pressure data. 9. The method for detecting the operating state of an oil pump based on the detection circuit of any one of claims 1-8, wherein the method comprises: acquiring the motor respectively based on the third processor chip U1 in the third detection circuit of the electrical parameter detection circuit module The operating voltage and current of the motor are calculated, and the operating power and power consumption data of the motor are calculated through the third processor chip U1; Based on the first input terminal and the second input terminal of the second processor chip U4 in the second detection circuit of the electrical parameter detection circuit module, the voltage signal of the magnetic ring on the neutral wire and live wire of the motor is collected, and based on the second processor chip U4 The collected voltage signal is analyzed and calculated to obtain the motor leakage current data; The first detection circuit based on the electrical parameter detection circuit module collects the motor output voltage when there is no trigger signal, and detects whether the motor circuit is short-circuited or open-circuited by calculating and analyzing the output voltage data. 10. The method for detecting an operating state of an oil pump according to claim 9, further comprising: Based on the oil pump pipeline pressure data output by the oil pump pressure detection and compensation circuit module, when the oil engine pump stops working, analyze whether the pressure reduction time is less than the first preset value, and if so, issue an alarm to indicate that the pipeline is not sealed; It also includes analyzing whether the real-time pipeline pressure is less than the second preset value based on the oil pump pipeline pressure data output by the oil pump pressure detection and compensation circuit module, and if so, automatically starting the oil pump to supplement the pressure.

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