CN107831390A - A kind of wireless monitoring device with leakage current detection function - Google Patents

Abstract

The invention discloses a wireless monitoring device with a leakage current detection function, which includes a microprocessing chip circuit, a wireless communication module, a leakage current sensing circuit, and an input stage of the wireless communication module is electrically connected to an output stage circuit of the microprocessing chip; The input stage of the leakage current sensing circuit samples the leakage current of the overvoltage protection device, and the output end of the leakage current sensing circuit is electrically connected with the first input end of the micro-processing chip circuit. The invention has the on-off indication function of the disconnector. When the leakage current and the number of overvoltages in the monitored overvoltage protector exceed the threshold, the invention can send an alarm; the device is small in size, wirelessly connected, easy to install, and free of space Special requirements: The user can read intuitively and clearly through the wireless receiving device, and the remote operation is safe and convenient. The wireless receiving device automatically records the status of the received on-off indication, and the historical data can be queried later, which improves work efficiency.

Description

A wireless monitoring device with leakage current detection function

technical field

The invention relates to the monitoring field of overvoltage protectors, in particular to a wireless monitoring device with leakage current detection function.

Background technique

A certain number of overvoltage protectors are installed in outdoor substations, such as overvoltage protectors composed of lightning arresters and capacitors. The interior of these overvoltage protectors is mainly composed of zinc oxide valve plates. When the overvoltage protector works for a certain number of years, the characteristics of its internal valve plate will gradually age, and there are serious risks of breakdown, explosion, etc., and the built-in disconnector may be disconnected. In order to monitor the working condition and aging degree of the overvoltage protector, various types of protector monitoring devices will be installed. Most of the monitoring devices are mechanical, and the detection results are not accurate.

Contents of the invention

The invention overcomes the defects of the above-mentioned existing mechanical overvoltage protector detection device, and provides a new wireless monitoring device with leakage current detection function. The invention can make an objective judgment on the overvoltage protector by analyzing the leakage current of the overvoltage protector. This device judges by current, which is more accurate than existing mechanical devices.

In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows:

A wireless monitoring device with a leakage current detection function, including a micro-processing chip circuit, a wireless communication module, and a leakage current sensing circuit, wherein,

The input stage of the wireless communication module is electrically connected with the output stage circuit of the microprocessor chip;

The input stage of the leakage current sensing circuit samples the leakage current of the overvoltage protection device, and the output end of the leakage current sensing circuit is electrically connected with the first input end of the micro-processing chip circuit.

The working process of the invention is as follows:

S1: The leakage current sensing circuit samples and processes the leakage current of the overvoltage protector;

S2: The micro-processing chip circuit analyzes the processed signal and obtains the analysis result;

S3: The micro-processing chip circuit sends the analysis results to the upper-level system through the wireless communication module.

In a preferred solution, the leakage current sensing circuit includes a sampling sensor and a signal processing sub-circuit, wherein,

The input stage of the sampling sensor is used as the input stage of the leakage current sensing circuit, and the output stage of the sampling sensor is electrically connected to the input stage of the signal processing sub-circuit;

The output end of the signal processing sub-circuit is used as the output end of the leakage current sensing circuit.

In a preferred solution, the wireless monitoring device further includes an overvoltage sensing circuit, the overvoltage sensing circuit counts the overvoltage signals, and feeds back the technical results to the microprocessing chip circuit, and the overvoltage sensing circuit The voltage sensing circuit includes an overvoltage sensor and a signal capture sub-circuit, wherein,

The input stage of the overvoltage sensor is used as the input stage of the overvoltage sensing circuit, and the output stage of the overvoltage sensor is electrically connected to the output stage of the sampling sensor;

The output stage of the overvoltage sensor is electrically connected to the input stage of the signal capture sub-circuit;

The output terminal of the signal capturing subcircuit is used as the output terminal of the overvoltage sensing circuit, and the output terminal of the signal capturing subcircuit is electrically connected with the second input terminal of the micro-processing chip circuit.

In a preferred solution, the signal processing sub-circuit includes a first transient suppression diode, a first capacitor, a first resistor, an instrumentation amplifier, a first inductor, a first diode, a second diode, The second capacitor, the first electrical path and the second electrical path; the input stage of the signal processing sub-circuit includes two input ends, and the two input ends are defined as R1.1 and R1.2; the described The output of the signal processing sub-circuit is defined as C1.1, where,

The input end of the first electrical path is used as the input end R1.1 of the signal conversion sub-circuit, and the output end of the first electrical path is electrically connected to the non-inverting input end of the instrumentation amplifier;

The input end of the second electrical path is used as the input end R1.2 of the signal conversion sub-circuit, and the output end of the second electrical path is electrically connected to the inverting input end of the instrumentation amplifier;

The No. 1 pin of the instrumentation amplifier is electrically connected to one end of the first resistor;

The No. 8 pin of the instrumentation amplifier is electrically connected to the other end of the first resistor;

The input end of the first electrical path is electrically connected to one end of the first transient suppression diode;

The input end of the second electrical path is electrically connected to the other end of the first transient suppression diode;

The non-inverting input terminal of the instrumentation amplifier is electrically connected to one end of the first capacitor;

The inverting input terminal of the instrumentation amplifier is electrically connected to the other end of the first capacitor;

The output end of the instrumentation amplifier is electrically connected to one end of the first inductor;

The other end of the first inductance is electrically connected to one end of the second capacitor;

The other end of the second capacitor is grounded;

One end of the second capacitor is electrically connected to the anode of the first diode;

The cathode of the first diode is electrically connected to the power supply;

One end of the second capacitor is electrically connected to the cathode of the second diode;

The anode of the second diode is grounded;

One end of the second capacitor serves as the output end C1.1 of the signal processing sub-circuit;

The first electrical path includes a second inductor, a second transient suppression diode, a second resistor, a second resistor and a third capacitor, and the connection relationship is as follows:

One end of the second inductance is used as the input end of the first electrical path, and the other end of the second inductance is electrically connected to one end of the second transient suppression diode;

The other end of the second TVS diode is grounded;

The other end of the second inductance is electrically connected to one end of the second resistor;

The other end of the second resistor is grounded;

The other end of the first inductance is electrically connected to one end of the third resistor;

The other end of the third resistor is electrically connected to one end of the third capacitor;

The other end of the third capacitor is grounded;

The other end of the third resistor is used as the output end of the first electrical path;

The second electrical path includes a third inductor, a third transient suppression diode, a fourth resistor, a fifth resistor and a fourth capacitor, and the connection relationship thereof is as follows:

One end of the third inductance is used as the input end of the second electrical path, and the other end of the third inductance is electrically connected to one end of the third transient suppression diode;

The other end of the third TVS diode is grounded;

The other end of the third inductance is electrically connected to one end of the fourth resistor;

The other end of the fourth resistor is grounded;

The other end of the third inductor is electrically connected to one end of the fifth resistor;

The other end of the fifth resistor is electrically connected to one end of the fourth capacitor;

The other end of the fourth capacitor is grounded;

The other end of the fifth resistor is used as the output end of the second electrical path.

In this preferred solution, the second inductance and the third inductance provide the function of filtering; the second resistor and the fourth resistor convert the fusing signal of the disconnector into a voltage signal; the third resistor, the fifth resistor, the third capacitor, and the fourth capacitor 1. The first capacitor forms a filter network; the first TVS diode, the second TVS diode and the third TVS diode protect the signal; the instrumentation amplifier amplifies the signal.

In a preferred solution, the signal capture subcircuit includes a sixth resistor, a seventh resistor, a third diode, a light emitting diode, a photosensitive NPN transistor and a fifth capacitor; the input of the signal capture subcircuit The stage includes 2 input terminals, and the two input terminals are defined as R2.1 and R2.2; the output terminal of the signal capture sub-circuit is defined as C2.1, wherein,

The R2.1 and R1.1 are electrically connected;

The R2.2 and R1.2 are electrically connected;

One end of the sixth resistor is used as R2.1, and the other end of the sixth resistor is electrically connected to the cathode of the third diode;

The anode of the third diode is used as R2.2;

The cathode of the third diode is electrically connected to the anode of the light emitting diode;

The anode of the third diode is electrically connected to the cathode of the light emitting diode;

The light-emitting diode and the phototransistor are coupled in a photoelectric form;

The emitter stage of the phototransistor is grounded;

The emitting stage of the phototransistor is electrically connected to one end of the fifth capacitor;

The collector of the phototransistor is electrically connected to the other end of the fifth capacitor;

The collector of the phototransistor is electrically connected to one end of the seventh resistor;

The other end of the seventh resistor is connected to a power supply;

The collector of the phototransistor is used as the output terminal C2.1 of the signal capture sub-circuit.

In this preferred solution, photoelectric isolation is used to separate strong electric signals from weak electric signals to ensure equipment safety.

In a preferred solution, the micro-processing chip circuit includes an LM1117-3.3 voltage conversion chip, a fourth diode, a sixth capacitor and a seventh capacitor, wherein,

No. 3 pins of the LM1117-3.3 voltage conversion chip are electrically connected to the power supply;

The No. 3 pin of the LM1117-3.3 voltage conversion chip is electrically connected to the cathode of the fourth diode;

The anode of the fourth diode is grounded;

No. 3 pins of the LM1117-3.3 voltage conversion chip are electrically connected to one end of the sixth capacitor;

The other end of the sixth capacitor is grounded;

The No. 1 pin of the LM1117-3.3 voltage conversion chip is grounded;

The No. 2 pin of the LM1117-3.3 voltage conversion chip is electrically connected to one end of the seventh capacitor;

The other end of the seventh capacitor is grounded.

This preferred solution is used to step down the voltage of the signal to meet the voltage requirements of the pins of the microprocessor chip.

In a preferred solution, the micro-processing chip circuit further includes STM32F103C8T6, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor capacitor, the tenth capacitor, the eleventh capacitor and the fifth diode, wherein,

The No. 1 pin of the STM32F103C8T6 is connected to the power supply;

The No. 7 pin of the STM32F103C8T6 is electrically connected to one end of the eighth resistor;

The other end of the eighth resistor is connected to a power supply;

The No. 7 pin of the STM32F103C8T6 is electrically connected to one end of the sixth capacitor;

The other end of the sixth capacitor is grounded;

The No. 8 pin of the STM32F103C8T6 is electrically connected to one end of the seventh capacitor;

The No. 8 pin of the STM32F103C8T6 is electrically connected to one end of the eighth capacitor;

The No. 8 pin of the STM32F103C8T6 is grounded;

The No. 9 pin of the STM32F103C8T6 is electrically connected to the other end of the seventh capacitor;

The No. 9 pin of the STM32F103C8T6 is electrically connected to the other end of the eighth capacitor;

The No. 9 pin of the STM32F103C8T6 is connected to the power supply;

The No. 11 pin of the STM32F103C8T6 is electrically connected to one end of the ninth resistor;

The other end of the ninth resistor is electrically connected to the anode of the fifth diode;

The cathode of the fifth diode is grounded;

The No. 15 pin of the STM32F103C8T6 is electrically connected to the output terminal C1.1 of the signal processing sub-circuit;

The No. 16 pin of the STM32F103C8T6 is electrically connected to the output terminal C2.1 of the signal capture sub-circuit;

The No. 20 pin of the STM32F103C8T6 is electrically connected to one end of the tenth resistor;

The other end of the tenth resistor is grounded;

The No. 23 pin of the STM32F103C8T6 is grounded;

The No. 23 pin of the STM32F103C8T6 is electrically connected to one end of the ninth capacitor;

The No. 24 pin of the STM32F103C8T6 is electrically connected to the other end of the ninth capacitor;

The No. 24 pin of the STM32F103C8T6 is grounded;

The No. 35 pin of the STM32F103C8T6 is grounded;

The No. 35 pin of the STM32F103C8T6 is electrically connected to one end of the tenth capacitor;

The No. 36 pin of the STM32F103C8T6 is electrically connected to the other end of the tenth capacitor;

The No. 36 pin of the STM32F103C8T6 is grounded;

The No. 44 pin of the STM32F103C8T6 is electrically connected to one end of the eleventh resistor;

The other end of the eleventh resistor is grounded;

The No. 47 pin of the STM32F103C8T6 is electrically connected to one end of the eleventh capacitor;

The No. 47 pin of the STM32F103C8T6 is electrically connected to one end of the twelfth capacitor;

The No. 47 pin of the STM32F103C8T6 is grounded;

The No. 48 pin of the STM32F103C8T6 is electrically connected to the other end of the eleventh capacitor;

The No. 48 pin of the STM32F103C8T6 is electrically connected to the other end of the twelfth capacitor;

The No. 48 pin of the STM32F103C8T6 is connected to the power supply.

In this preferred solution, pin 15 of the STM32F103C8T6 receives the output signal of the signal processing sub-circuit; pin 16 of the STM32F103C8T6 receives the output signal of the signal capture sub-circuit.

In a preferred solution, the wireless communication module includes a wireless communication chip, a sixth diode and a fuse, wherein,

The VCC pin of the wireless communication chip is connected to the power supply;

The GND pin of the wireless communication chip is grounded;

The TXD1 pin of the wireless communication chip is electrically connected to the No. 21 pin of STM32F103C8T6;

The RXD1 pin of the wireless communication chip is electrically connected to the No. 22 pin of STM32F103C8T6;

The CON1 pin of the wireless communication chip is electrically connected to the No. 28 pin of STM32F103C8T6;

The RGND pin of the wireless communication chip is grounded;

The CON2 pin of the wireless communication chip is electrically connected to the No. 32 pin of STM32F103C8T6;

The RXD2 pin of the wireless communication chip is electrically connected to the No. 31 pin of STM32F103C8T6;

The TXD2 pin of the wireless communication chip is electrically connected to the No. 30 pin of STM32F103C8T6;

The VO pin of the wireless communication chip is electrically connected to one end of the fuse;

The other end of the fuse is electrically connected to the cathode of the sixth diode;

The other end of the fuse is connected to a power supply;

The anode of the sixth diode is grounded.

In this preferred solution, pin No. 21, pin No. 22, pin No. 28, pin No. 30, pin No. 31 and pin No. 32 of STM32F103C8T6 are used for wireless communication.

In a preferred solution, the wireless monitoring device also includes a watchdog module, and the watchdog module regularly communicates with the wireless communication module and the microprocessing chip circuit, if the wireless communication module or the microprocessing chip circuit cannot In response to communication, the corresponding circuit is restarted.

In a preferred solution, the wireless monitoring device further includes a power supply, and the power supply supplies power to the wireless monitoring device.

Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

1. The present invention has the on-off indication function of the disconnector. When the leakage current and the number of overvoltages in the monitored overvoltage protector exceed the threshold, the present invention can issue an alarm;

2. The present invention adopts wireless transmission technology, the device is small in size, wirelessly connected, easy to install, and has no special requirements for space;

3. Secondly, the user can read intuitively and clearly through the wireless receiving device, and the remote operation is safe and convenient. The wireless receiving device automatically records the status of the on-off indication received, and the historical data can be queried later, which improves the work efficiency.

Description of drawings

Figure 1 is a structural diagram of the embodiment.

Fig. 2 is a diagram of the signal processing circuit and the signal capture circuit of the embodiment.

Fig. 3 is the circuit diagram of the voltage conversion chip of the embodiment LM1117-3.3.

Fig. 4 is a circuit diagram of the embodiment STM32F103C8T6.

Fig. 5 is a circuit diagram of the wireless communication module of the embodiment.

Fig. 6 is an example diagram of the installation of the embodiment.

Explanation of symbols: 1. overvoltage protector; 2. embodiment monitoring device; 3. mounting nut.

Detailed ways

The accompanying drawings are for illustrative purposes only and cannot be construed as limiting the patent;

For those skilled in the art, it is understandable that some well-known structures and descriptions thereof may be omitted in the drawings.

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a wireless monitoring device with a leakage current detection function includes a micro-processing chip circuit, a wireless communication module, a sampling sensor, a signal processing circuit, an overvoltage sensor and a signal capture circuit, a watchdog module and a power supply, in,

The input stage of the sampling sensor samples the leakage current of the overvoltage protection device;

The output stage of the sampling sensor is electrically connected with the input stage of the signal processing circuit;

The output terminal of the signal processing circuit is electrically connected with the first input terminal of the micro-processing chip circuit;

The output stage of the overvoltage sensor is electrically connected to the output stage of the sampling sensor;

The output stage of the overvoltage sensor is electrically connected to the input stage of the signal capture circuit;

The output terminal of the signal capture circuit is electrically connected with the second input terminal of the microprocessing chip circuit;

The watchdog module regularly communicates with the wireless communication module and the microprocessing chip circuit, and if the wireless communication module or the microprocessing chip circuit cannot respond to the communication, the corresponding circuit is restarted.

As shown in Figure 2, the signal processing circuit includes a first TVS diode, a first capacitor, a first resistor, an instrumentation amplifier, a first inductor, a first diode, a second diode, a second capacitor, a first An electrical path and a second electrical path; the input stage of the signal processing circuit includes 2 input ends, and the two input ends are defined as PTC- and PTC+; the output end of the signal processing circuit is defined as Corrent-C, wherein,

The input end of the first electrical path is used as the input end PTC- of the signal conversion circuit, and the output end of the first electrical path is electrically connected to the non-inverting input end of the instrument amplifier;

The input end of the second electric path is used as the input end PTC+ of the signal conversion circuit, and the output end of the second electric path is electrically connected with the inverting input end of the instrument amplifier;

The No. 1 pin of the instrumentation amplifier is electrically connected to one end of the first resistor;

The No. 8 pin of the instrumentation amplifier is electrically connected to the other end of the first resistor;

The input end of the first electrical path is electrically connected to one end of the first transient suppression diode;

The input end of the second electrical path is electrically connected to the other end of the first transient suppression diode;

The non-inverting input terminal of the instrumentation amplifier is electrically connected to one end of the first capacitor;

The inverting input terminal of the instrumentation amplifier is electrically connected to the other end of the first capacitor;

The output end of the instrumentation amplifier is electrically connected to one end of the first inductor;

The other end of the first inductor is electrically connected to one end of the second capacitor;

The other end of the second capacitor is grounded;

One end of the second capacitor is electrically connected to the anode of the first diode;

The cathode of the first diode is electrically connected to the power supply;

One end of the second capacitor is electrically connected to the cathode of the second diode;

the anode of the second diode is grounded;

One end of the second capacitor serves as the output end Corrent-C of the signal processing circuit;

The first electrical path includes a second inductor, a second transient suppression diode, a second resistor, a second resistor and a third capacitor, and the connection relationship is as follows:

One end of the second inductance is used as the input end of the first electrical path, and the other end of the second inductance is electrically connected to one end of the second transient suppression diode;

The other end of the second transient suppression diode is grounded;

The other end of the second inductance is electrically connected to one end of the second resistor;

The other end of the second resistor is grounded;

The other end of the first inductor is electrically connected to one end of the third resistor;

The other end of the third resistor is electrically connected to one end of the third capacitor;

The other end of the third capacitor is grounded;

The other end of the third resistor is used as the output end of the first electrical path;

The second electrical path includes a third inductor, a third transient suppression diode, a fourth resistor, a fifth resistor, and a fourth capacitor, and the connection relationship thereof is as follows:

One end of the third inductance is used as the input end of the second electrical path, and the other end of the third inductance is electrically connected to one end of the third transient suppression diode;

The other end of the third transient suppression diode is grounded;

The other end of the third inductor is electrically connected to one end of the fourth resistor;

The other end of the fourth resistor is grounded;

The other end of the third inductor is electrically connected to one end of the fifth resistor;

The other end of the fifth resistor is electrically connected to one end of the fourth capacitor;

The other end of the fourth capacitor is grounded;

The other end of the fifth resistor serves as the output end of the second electrical path.

The signal capture circuit includes a sixth resistor, a seventh resistor, a third diode, a light-emitting diode, a photosensitive NPN transistor and a fifth capacitor; the input stage of the signal capture circuit includes two input terminals, and the two input terminals Terminals are defined as PTC- and PTC+; the output terminal of the signal capture circuit is defined as Count-C, wherein,

One end of the sixth resistor is used as PTC-, and the other end of the sixth resistor is electrically connected to the cathode of the third diode;

The anode of the third diode is used as PTC+;

The cathode of the third diode is electrically connected to the anode of the light emitting diode;

The anode of the third diode is electrically connected to the cathode of the light emitting diode;

Light-emitting diodes and phototransistors are coupled through photoelectricity;

The emitter of the phototransistor is grounded;

The emitting stage of the phototransistor is electrically connected to one end of the fifth capacitor;

The collector of the phototransistor is electrically connected to the other end of the fifth capacitor;

The collector of the phototransistor is electrically connected to one end of the seventh resistor;

The other end of the seventh resistor is connected to the power supply;

The collector of the phototransistor is used as the output terminal Count-C of the signal capture circuit.

As shown in Figure 3, the micro-processing chip circuit includes an LM1117-3.3 voltage conversion chip, a fourth diode, a sixth capacitor and a seventh capacitor, wherein,

The 3rd pin of the LM1117-3.3 voltage conversion chip is electrically connected to the power supply;

The No. 3 pin of the LM1117-3.3 voltage conversion chip is electrically connected to the cathode of the fourth diode;

The anode of the fourth diode is grounded;

The No. 3 pin of the LM1117-3.3 voltage conversion chip is electrically connected to one end of the sixth capacitor;

The other end of the sixth capacitor is grounded;

The pin 1 of the LM1117-3.3 voltage conversion chip is grounded;

The No. 2 pin of the LM1117-3.3 voltage conversion chip is electrically connected to one end of the seventh capacitor;

The other end of the seventh capacitor is grounded.

As shown in Figure 4, the microprocessor chip circuit also includes STM32F103C8T6, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, and a tenth capacitor , the eleventh capacitor and the fifth diode, where,

Pin 1 of STM32F103C8T6 is connected to the power supply;

Pin 7 of STM32F103C8T6 is electrically connected to one end of the eighth resistor;

The other end of the eighth resistor is connected to the power supply;

Pin 7 of STM32F103C8T6 is electrically connected to one end of the sixth capacitor;

The other end of the sixth capacitor is grounded;

Pin 8 of STM32F103C8T6 is electrically connected to one end of the seventh capacitor;

Pin 8 of STM32F103C8T6 is electrically connected to one end of the eighth capacitor;

Pin 8 of STM32F103C8T6 is grounded;

Pin 9 of STM32F103C8T6 is electrically connected to the other end of the seventh capacitor;

Pin 9 of STM32F103C8T6 is electrically connected to the other end of the eighth capacitor;

Pin 9 of STM32F103C8T6 is connected to the power supply;

Pin 11 of STM32F103C8T6 is electrically connected to one end of the ninth resistor;

The other end of the ninth resistor is electrically connected to the anode of the fifth diode;

The cathode of the fifth diode is grounded;

Pin 15 of STM32F103C8T6 is electrically connected to the output terminal Corrent-C of the signal processing circuit;

Pin 16 of STM32F103C8T6 is electrically connected to the output terminal Count-C of the signal capture circuit;

Pin 20 of STM32F103C8T6 is electrically connected to one end of the tenth resistor;

The other end of the tenth resistor is grounded;

Pin 23 of STM32F103C8T6 is grounded;

Pin 23 of STM32F103C8T6 is electrically connected to one end of the ninth capacitor;

Pin 24 of STM32F103C8T6 is electrically connected to the other end of the ninth capacitor;

Pin 24 of STM32F103C8T6 is grounded;

Pin 35 of STM32F103C8T6 is grounded;

Pin 35 of STM32F103C8T6 is electrically connected to one end of the tenth capacitor;

Pin 36 of STM32F103C8T6 is electrically connected to the other end of the tenth capacitor;

Pin 36 of STM32F103C8T6 is grounded;

Pin 44 of STM32F103C8T6 is electrically connected to one end of the eleventh resistor;

The other end of the eleventh resistor is grounded;

Pin 47 of STM32F103C8T6 is electrically connected to one end of the eleventh capacitor;

Pin 47 of STM32F103C8T6 is electrically connected to one end of the twelfth capacitor;

Pin 47 of STM32F103C8T6 is grounded;

Pin 48 of STM32F103C8T6 is electrically connected to the other end of the eleventh capacitor;

Pin 48 of STM32F103C8T6 is electrically connected to the other end of the twelfth capacitor;

Pin 48 of STM32F103C8T6 is connected to the power supply.

As shown in Figure 5, the wireless communication module includes a wireless communication chip, a sixth diode and a fuse, wherein,

The VCC pin of the wireless communication chip is connected to the power supply;

The GND pin of the wireless communication chip is grounded;

The TXD1 pin of the wireless communication chip is electrically connected to the No. 21 pin of STM32F103C8T6;

The RXD1 pin of the wireless communication chip is electrically connected to the 22nd pin of STM32F103C8T6;

The CON1 pin of the wireless communication chip is electrically connected to the 28th pin of STM32F103C8T6;

The RGND pin of the wireless communication chip is grounded;

The CON2 pin of the wireless communication chip is electrically connected to the No. 32 pin of STM32F103C8T6;

The RXD2 pin of the wireless communication chip is electrically connected to the No. 31 pin of STM32F103C8T6;

The TXD2 pin of the wireless communication chip is electrically connected to the 30th pin of STM32F103C8T6;

The VO pin of the wireless communication chip is electrically connected to one end of the fuse;

The other end of the fuse is electrically connected to the cathode of the sixth diode;

The other end of the fuse is connected to the power supply;

The anode of the sixth diode is grounded.

As shown in FIG. 6 , the monitoring device 2 of this embodiment is installed in a metal box, and the metal box is connected to the overvoltage protection device 1 through nuts and bolts. Embodiment The signal of the disconnector is sampled through the grounding screw inside the overvoltage protection device 1 .

The same or similar reference numerals correspond to the same or similar components;

The terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be interpreted as limitations on this patent;

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the claims of the present invention.

Claims (10)

1. a kind of wireless monitoring device with leakage current detection function, including micro-chip processor circuit, it is characterised in that also Including wireless communication module, leakage current sensor circuit, wherein,

The input stage of described wireless communication module electrically connects with the output-stage circuit of micro-chip processor；

The input stage of described leakage current sensor circuit samples to the leakage current of overvoltage protection, leakage current The output end of sensor circuit electrically connects with the first input end of micro-chip processor circuit.

2. wireless monitoring device according to claim 1, it is characterised in that described leakage current sensor circuit includes adopting Sample sensor and signal transacting sub-circuit, wherein,

Input stage of the input stage of described sampling sensor as leakage current sensor circuit, the output stage of sampling sensor with Signal transacting sub-circuit input stage electrically connects；

Output end of the output end of described signal transacting sub-circuit as leakage current sensor circuit.

3. wireless monitoring device according to claim 2, it is characterised in that described wireless monitoring device also included electricity Sensor circuit is pressed, described overvoltage sensor circuit is counted to overvoltage signal, and technical result is fed back into microprocessor Chip circuit, described overvoltage sensor circuit include overvoltage sensor and signal capture sub-circuit, wherein,

Input stage of the input stage of described overvoltage sensor as overvoltage sensor circuit, the output stage of overvoltage sensor Electrically connected with the output stage of sampling sensor；

The output stage of described overvoltage sensor electrically connects with the input stage of signal capture sub-circuit；

Output end of the output end of described signal capture sub-circuit as overvoltage sensor circuit, signal capture sub-circuit it is defeated Go out end to electrically connect with the second input of micro-chip processor circuit.

4. wireless monitoring device according to claim 3, it is characterised in that described signal transacting sub-circuit includes first Transient Suppression Diode, the first electric capacity, first resistor, instrument amplifier, the first inductance, the first diode, the second diode, Two electric capacity, the first electric pathway and the second electric pathway；The input stage of described signal transacting sub-circuit includes 2 inputs, described Two inputs be defined as R1.1 and R1.2；The output end of described signal transacting sub-circuit is defined as C1.1, wherein,

Input R1.1 of the input of the first described electric pathway as signal conversion sub-circuit, the output end of the first electric pathway Electrically connected with the in-phase input end of instrument amplifier；

Input R1.2 of the input of the second described electric pathway as signal conversion sub-circuit, the output end of the second electric pathway Electrically connected with the inverting input of instrument amplifier；

No. 1 pin of described instrument amplifier electrically connects with one end of first resistor；

No. 8 pins of described instrument amplifier electrically connect with the other end of first resistor；

The input of the first described electric pathway electrically connects with one end of the first Transient Suppression Diode；

The input of the second described electric pathway electrically connects with the other end of the first Transient Suppression Diode；

The in-phase input end of described instrument amplifier electrically connects with one end of the first electric capacity；

The inverting input of described instrument amplifier electrically connects with the other end of the first electric capacity；

The output end of described instrument amplifier electrically connects with one end of the first inductance；

The other end of the first described inductance electrically connects with one end of the second electric capacity；

The other end ground connection of the second described electric capacity；

One end of the second described electric capacity electrically connects with the anode of the first diode；

The negative electrode and power electric connection of the first described diode；

One end of the second described electric capacity electrically connects with the negative electrode of the second diode；

The plus earth of the second described diode；

Output end C1.1 of the one end of the second described electric capacity as signal transacting sub-circuit；

The first described electric pathway includes the second inductance, the second Transient Suppression Diode, second resistance, second resistance and the 3rd electricity Hold, its annexation is as follows：

Input of the one end of the second described inductance as the first electric pathway, the other end of the second inductance and the second transient state suppress One end electrical connection of diode；

The other end ground connection of the second described Transient Suppression Diode；

The described other end of the second inductance electrically connects with one end of second resistance；

The other end ground connection of described second resistance；

The described other end of the first inductance electrically connects with one end of 3rd resistor；

The other end of described 3rd resistor electrically connects with one end of the 3rd electric capacity；

The other end ground connection of the 3rd described electric capacity；

Output end of the other end of described 3rd resistor as the first electric pathway；

The second described electric pathway includes the 3rd inductance, the 3rd Transient Suppression Diode, the 4th resistance, the 5th resistance and the 4th electricity Hold, its annexation is as follows：

Input of the one end of the 3rd described inductance as the second electric pathway, the other end of the 3rd inductance and the 3rd transient state suppress One end electrical connection of diode；

The other end ground connection of the 3rd described Transient Suppression Diode；

The other end of the 3rd described inductance electrically connects with one end of the 4th resistance；

The other end ground connection of the 4th described resistance；

The other end of the 3rd described inductance electrically connects with one end of the 5th resistance；

The other end of the 5th described resistance electrically connects with one end of the 4th electric capacity；

The other end ground connection of the 4th described electric capacity；

Output end of the other end of the 5th described resistance as the second electric pathway.

5. wireless monitoring device according to claim 4, it is characterised in that described signal capture sub-circuit includes the 6th Resistance, the 7th resistance, the 3rd diode, light emitting diode, photosensitive NPN triode and the 5th electric capacity；Described signal capture The input stage of circuit includes 2 inputs, and described two inputs are defined as R2.1 and R2.2；Described signal capture electricity The output end on road is defined as C2.1, wherein,

Described R2.1 and R1.1 electrical connections；

Described R2.2 and R1.2 electrical connections；

One end of the 6th described resistance electrically connects as R2.1, the other end of the 6th resistance with the negative electrode of the 3rd diode；

The anode of the 3rd described diode is as R2.2；

The negative electrode of the 3rd described diode electrically connects with the anode of light emitting diode；

The anode of the 3rd described diode electrically connects with the negative electrode of light emitting diode；

Described light emitting diode is coupled with phototriode by photoelectricity form；

The emitting stage ground connection of described phototriode；

The emitting stage of described phototriode electrically connects with one end of the 5th electric capacity；

The colelctor electrode of described phototriode electrically connects with the other end of the 5th electric capacity；

The colelctor electrode of described phototriode electrically connects with one end of the 7th resistance；

Another termination power of the 7th described resistance；

Output end C2.1 of the colelctor electrode of described phototriode as signal capture sub-circuit.

6. wireless monitoring device according to claim 5, it is characterised in that described micro-chip processor circuit includes LM1117-3.3 voltage conversion chips, the 4th diode, the 6th electric capacity and the 7th electric capacity, wherein,

No. 3 pins and power electric connection of described LM1117-3.3 voltage conversion chips；

No. 3 pins of described LM1117-3.3 voltage conversion chips electrically connect with the negative electrode of the 4th diode；

The plus earth of the 4th described diode；

No. 3 pins of described LM1117-3.3 voltage conversion chips electrically connect with one end of the 6th electric capacity；

The other end ground connection of the 6th described electric capacity；

No. 1 pin ground connection of described LM1117-3.3 voltage conversion chips；

No. 2 pins of described LM1117-3.3 voltage conversion chips electrically connect with one end of the 7th electric capacity；

The other end ground connection of the 7th described electric capacity.

7. wireless monitoring device according to claim 6, it is characterised in that described micro-chip processor circuit also includes STM32F103C8T6, the 8th resistance, the 9th resistance, the tenth resistance, the 11st resistance, the 6th electric capacity, the 7th electric capacity, the 8th electricity Appearance, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity and the 5th diode, wherein,

Described STM32F103C8T6 No. 1 pin connects power supply；

Described STM32F103C8T6 No. 7 pins electrically connect with one end of the 8th resistance；

Another termination power of the 8th described resistance；

Described STM32F103C8T6 No. 7 pins electrically connect with one end of the 6th electric capacity；

The other end ground connection of the 6th described electric capacity；

Described STM32F103C8T6 No. 8 pins electrically connect with one end of the 7th electric capacity；

Described STM32F103C8T6 No. 8 pins electrically connect with one end of the 8th electric capacity；

Described STM32F103C8T6 No. 8 pins ground connection；

Described STM32F103C8T6 No. 9 pins electrically connect with the other end of the 7th electric capacity；

Described STM32F103C8T6 No. 9 pins electrically connect with the other end of the 8th electric capacity；

Described STM32F103C8T6 No. 9 pins connect power supply；

Described STM32F103C8T6 No. 11 pins electrically connect with one end of the 9th resistance；

The other end of the 9th described resistance electrically connects with the anode of the 5th diode；

The minus earth of the 5th described diode；

Described STM32F103C8T6 No. 15 pins electrically connect with the output end C1.1 of signal transacting sub-circuit；

Described STM32F103C8T6 No. 16 pins electrically connect with the output end C2.1 of signal capture sub-circuit；

Described STM32F103C8T6 No. 20 pins electrically connect with one end of the tenth resistance；

The other end ground connection of the tenth described resistance；

Described STM32F103C8T6 No. 23 pins ground connection；

Described STM32F103C8T6 No. 23 pins electrically connect with one end of the 9th electric capacity；

Described STM32F103C8T6 No. 24 pins electrically connect with the other end of the 9th electric capacity；

Described STM32F103C8T6 No. 24 pins ground connection；

Described STM32F103C8T6 No. 35 pins ground connection；

Described STM32F103C8T6 No. 35 pins electrically connect with one end of the tenth electric capacity；

Described STM32F103C8T6 No. 36 pins electrically connect with the other end of the tenth electric capacity；

Described STM32F103C8T6 No. 36 pins ground connection；

Described STM32F103C8T6 No. 44 pins electrically connect with one end of the 11st resistance；

The other end ground connection of the 11st described resistance；

Described STM32F103C8T6 No. 47 pins electrically connect with one end of the 11st electric capacity；

Described STM32F103C8T6 No. 47 pins electrically connect with one end of the 12nd electric capacity；

Described STM32F103C8T6 No. 47 pins ground connection；

Described STM32F103C8T6 No. 48 pins electrically connect with the other end of the 11st electric capacity；

Described STM32F103C8T6 No. 48 pins electrically connect with the other end of the 12nd electric capacity；

Described STM32F103C8T6 No. 48 pins connect power supply.

8. wireless monitoring device according to claim 7, it is characterised in that described wireless communication module includes channel radio Believe chip, the 6th diode and fuse, wherein,

The VCC pin of described wireless communication chips connects power supply；

The GND pin ground connection of described wireless communication chips；

The TXD1 pins of described wireless communication chips electrically connect with STM32F103C8T6 No. 21 pins；

The RXD1 pins of described wireless communication chips electrically connect with STM32F103C8T6 No. 22 pins；

The CON1 pins of described wireless communication chips electrically connect with STM32F103C8T6 No. 28 pins；

The RGND pins ground connection of described wireless communication chips；

The CON2 pins of described wireless communication chips electrically connect with STM32F103C8T6 No. 32 pins；

The RXD2 pins of described wireless communication chips electrically connect with STM32F103C8T6 No. 31 pins；

The TXD2 pins of described wireless communication chips electrically connect with STM32F103C8T6 No. 30 pins；

The VO pins of described wireless communication chips electrically connect with one end of fuse；

The other end of described fuse electrically connects with the negative electrode of the 6th diode；

Another termination power of described fuse；

The plus earth of the 6th described diode.

9. the wireless monitoring device according to any claim in claim 1 to 8, it is characterised in that described is wireless Monitoring device also includes watchdog module, and described watchdog module periodically leads to wireless communication module and micro-chip processor circuit Letter, if wireless communication module or micro-chip processor circuit cannot respond to communicate, restarts corresponding circuit.

10. wireless monitoring device according to claim 9, it is characterised in that described wireless monitoring device also includes electricity Source, described power supply are powered to wireless monitoring device.