Circuit system special for fault diagnosis and isolation of high-voltage wire connector

Abstract

The utility model relates to the technical field of high-voltage wire connectors, and discloses a special circuit system for fault diagnosis and isolation of a high-voltage wire connector. A signal processing module; a fault diagnosis module; a fault isolation module; the signal acquisition module can acquire voltage, current and temperature parameters of the high-voltage wire connector in real time, signal preprocessing (filtering, amplification and A / D conversion) and analysis are carried out through the signal processing module, fault features are extracted, the fault diagnosis module judges whether a fault exists according to the fault features and determines the position and the type of the fault, and the fault diagnosis module carries out fault diagnosis according to the fault features. Through the real-time fault detection and positioning capability, faults can be found and processed in time at the initial stage of occurrence of the faults, further development of the faults is avoided, and the fault isolation module can respond quickly at the initial stage of occurrence of the faults, isolate the faults from the system, prevent fault diffusion and protect other components from being affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -voltage wiring device technical field, concretely is high -voltage wiring device fault diagnosis and isolation special circuit system. BACKGROUND

[0002] High -voltage wiring device, usually refers to high -voltage electric connector or high -voltage cable connector, it is a kind of in high -voltage environment for connecting circuit or transmission electric energy element. High -voltage wiring device passes through its inside pin (or jack) and wire, and the circuit of power supply or equipment is connected, realizes the transmission of electric energy. Meanwhile, its inside insulating material and shell then play the role of protecting circuit and element, prevent current leakage or interfere with other equipment.

[0003] Through the retrieval, the patent with application No. CN201921614480.5 discloses a kind of high-voltage transmission equipment wiring device, including first insulating shell and second insulating shell, the outer surface rear side of the first insulating shell is equipped with threaded sleeve, the outer surface front side of the second insulating shell is equipped with external thread, the outer surface of the external thread is connected with the inner side surface of threaded sleeve, the outer surface of the first insulating shell and second insulating shell is equipped with air hole, the outer side end of the first insulating shell and second insulating shell is equipped with connecting pipe, the inside surface both sides of the first insulating shell and second insulating shell are equipped with mounting block, the outer surface of the mounting block is fixedly installed with conducting plate by mounting screw, the inside of the connecting pipe is fixedly embedded with sealing rubber block, the inner side surface of the sealing rubber block is fixedly connected with connecting wire, so that the convenience and stability of use can be greatly improved, guarantee safety and efficiency.

[0004] Current high -voltage wiring device is not convenient for many aspects, rapid and timely diagnosis of fault when carrying out fault information diagnosis, and signal acquisition has error, is easy to cause fault false alarm or miss report, influence the accuracy of fault location, therefore we need to propose high -voltage wiring device fault diagnosis and isolation special circuit system. INVENTION CONTENTS

[0005] The utility model aims at providing high -voltage wiring device fault diagnosis and isolation special circuit system, signal acquisition module can obtain the voltage, current, temperature parameter of high -voltage wiring device in real time, and carries out signal pretreatment (filtering, amplification, A / D conversion) and analysis through signal processing module, extracts fault feature, fault diagnosis module judges whether there is fault according to fault feature, and determines the position and type of fault, through the real -time fault detection and positioning ability, can be discovered and handled in time in the early stage of fault, avoid the further development of fault, and fault isolation module can rapidly respond and isolate the fault from system at the beginning of fault, prevent fault diffusion, protect other components work not be affected, to solve the problem raised in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: high voltage connector fault diagnosis and isolation special circuit system, include:

[0007] Signal acquisition module responsible for collecting high voltage connector working state signal;

[0008] Signal processing module to the signal output by signal acquisition module carries out filter, amplification, AD conversion processing;

[0009] Fault diagnosis module according to the data provided by signal processing module, carries out fault diagnosis to high voltage connector;

[0010] Fault isolation module responsible for isolating fault part from the whole circuit system;

[0011] Signal acquisition module, signal processing module, fault diagnosis module, fault isolation module are connected in turn.

[0012] Preferably, the signal acquisition module includes current voltage acquisition module and temperature acquisition module, the current voltage acquisition module includes current transformer TA1 and voltage transformer TU1, the 2 feet of current transformer TA1 are connected with resistance R1, resistance R2 and capacitor C1 in series, the 4 feet of voltage transformer TU1 are connected with resistance R5, resistance R6 and capacitor C2 in series, the 2 feet of current transformer TA1 and the 4 feet of voltage transformer TU1 are connected.

[0013] Preferably, the temperature acquisition module includes comparator U14A, comparator U14B, interface P30, the resistance R69 is connected between the 1 foot of comparator U14A and the 5 foot of comparator U14B, the 2 foot of comparator U14A is connected with the 1 foot of interface P30, the 1 foot of comparator U14A is connected with the 2 foot of interface P30, the resistance R70 is connected between the 6 foot of comparator U14B and the 1 foot of interface P30;

[0014] The 3 foot of comparator U14A is connected with resistance R67 connected with 5V and parallelly arranged electric receiver VR1 and diode D27 respectively, the resistance R73 is connected between the 6 foot and the 7 foot of comparator U14B, the 7 foot of comparator U14B is connected with resistance R74, one end of resistance R74 is connected with parallelly arranged diode D28 and capacitor C36.

[0015] Preferably, the signal processing module comprises a signal filtering and amplifying module and a signal conversion module, the signal filtering and amplifying module comprises a comparator U2A and a comparator U2B, a capacitor C43 and a resistor R53 are connected between the 1th pin of the comparator U2A and the 6th pin of the comparator U2B, a resistor R43 and a capacitor C33 are connected in parallel between the 1th pin and the 2th pin of the comparator U2A, and a resistor R73 and a capacitor C53 are connected in parallel between the 6th pin and the 7th pin of the comparator U2B.

[0016] Preferably, the signal conversion module comprises an interface J6 and a chip U5, a resistor R27 is connected between the 1th pin of the interface J6 and the 8th pin of the chip U5, and a resistor R11 and a light emitting diode LED10 are connected in series at the 3th pin of the interface J6, and the signal conversion module further comprises a potentiometer V1, and the potentiometer V1 is connected with a resistor R16 and a resistor R17 connected in series and a resistor R18 and a resistor R19 connected in series in parallel at both ends.

[0017] The potentiometer V1 is connected to the 7th pin of the chip U5, the connection end of the resistor R18 and the resistor R19 is connected to the 3th pin of the chip U5, and the connection end of the resistor R16 and the resistor R17 is connected to the 2th pin of the chip U5.

[0018] Preferably, the fault diagnosis module comprises a chip U3, an inductor L1 is connected between the 1th pin and the 5th pin of the chip U3, a resistor R58 is connected to the 4th pin of the chip U3, a capacitor C25 and a capacitor C35 are respectively connected to the 2th pin of the chip U3, a diode D2 is connected to the 1th pin of the chip U3, a resistor R20, a resistor R21 and a resistor R75 are respectively connected to the 3th pin of the chip U3, and the connection end of the diode D2 and the resistor R75 and the connection end of the resistor R20 and the resistor R21 are connected with a resistor R95, a capacitor C24 and a capacitor C25 connected in parallel.

[0019] Preferably, the fault isolation module comprises an interface H1, an optical coupler U1, an interface P3, a relay RLY1, an interface P2, a triode Q1 and a triode Q2, the relay RLY1 is connected with the interface P2, a resistor R500 and a light emitting diode D14 are connected in series at the 1th pin of the optical coupler U1, the 2th pin of the optical coupler U1 is connected with the 1th pin of the interface H1, a resistor R300 is connected between the 4th pin of the optical coupler U1 and the base of the triode Q2, a resistor R200 is connected between the 4th pin of the optical coupler U1 and the emitter of the triode Q2, a diode D16 is connected between the 1th pin and the 4th pin of the relay RLY1, and the two ends of the diode D16 are connected with a resistor R400 and a light emitting diode D15 connected in series.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] 1、The signal acquisition module can acquire the voltage, current and temperature parameters of the high-voltage connector in real time, and the signal preprocessing (filtering, amplification, A / D conversion) and analysis are carried out through the signal processing module, the fault characteristics are extracted, the fault diagnosis module judges whether there is a fault according to the fault characteristics, and the position and type of the fault are determined;

[0022] 2、The utility model discloses a real-time fault detection and positioning ability, can in the early stage of fault occurrence in time discovery and handle, avoid the further development of the fault, and the fault isolation module can be at the beginning of fault, rapid response, isolate the fault from the system, prevent the fault diffusion, protect other component work not to be influenced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the circuit diagram of the current voltage acquisition module of the utility model;

[0024] Figure 2 It is the circuit diagram of the temperature acquisition module of the utility model;

[0025] Figure 3 It is the circuit diagram of the signal filter amplification module of the utility model;

[0026] Figure 4 It is the circuit diagram of the signal conversion module of the utility model;

[0027] Figure 5 It is the circuit diagram of the fault diagnosis module of the utility model;

[0028] Figure 6 It is the circuit diagram of the fault isolation module of the utility model. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0030] Please refer to Figures 1-6 The utility model provides a technical scheme: high-voltage connector fault diagnosis and isolation special circuit system, comprising:

[0031] The signal acquisition module is responsible for collecting high-voltage connector working state signal;

[0032] The signal acquisition module comprises a current voltage acquisition module and a temperature acquisition module, the current voltage acquisition module comprises a current transformer TA1 and a voltage transformer TU1, the 2-pin of the current transformer TA1 is connected in series with a resistor R1, a resistor R2 and a capacitor C1, the 4-pin of the voltage transformer TU1 is connected in series with a resistor R5, a resistor R6 and a capacitor C2, and the 2-pin of the current transformer TA1 and the 4-pin of the voltage transformer TU1 are connected.

[0033] The current transformer TA1 is used for detecting alternating current, converting a large current into a small current signal for measurement and processing, the voltage transformer TU1 converts alternating voltage into a lower voltage signal for facilitating subsequent circuit processing, the capacitor C1 and the capacitor C2 are used for filtering, and the capacitor C3 and the capacitor C4 are electrolytic capacitors used for power filtering and voltage stabilization.

[0034] The temperature acquisition module comprises a comparator U14A, a comparator U14B and an interface P30, a resistor R69 is connected between the 1-pin of the comparator U14A and the 5-pin of the comparator U14B, the 2-pin of the comparator U14A is connected with the 1-pin of the interface P30, the 1-pin of the comparator U14A is connected with the 2-pin of the interface P30, and a resistor R70 is connected between the 6-pin of the comparator U14B and the 1-pin of the interface P30.

[0035] The 3-pin of the comparator U14A is connected with a resistor R67 connected with 5V and an electric receiver VR1 and a diode D27 connected in parallel, a resistor R73 is connected between the 6-pin and the 7-pin of the comparator U14B, a resistor R74 is connected with the 7-pin of the comparator U14B, and one end of the resistor R74 is connected with a diode D28 and a capacitor C36 connected in parallel.

[0036] The resistor R67, the diode D27 and the electric receiver VR1 form a voltage reference circuit, generate a stable reference voltage, and are used for providing a reference level for a subsequent circuit; the 2-pin of the comparator U14A is connected with the reference voltage, and the 3-pin is connected with an input signal, and the input signal is processed; the resistor R69, the resistor R70 and the resistor R71 form a voltage dividing network, and are used for adjusting a signal amplitude; the comparator U14B, the resistor R73 and the resistor R74 form a signal conditioning circuit, and further process the signal.

[0037] The diode D28 is used for voltage clamping protection, and the capacitor C36 is used for filtering and stabilizing an output signal.

[0038] A signal processing module for filtering, amplifying and A / D converting a signal output by the signal acquisition module;

[0039] The signal processing module comprises a signal filtering and amplifying module and a signal conversion module, the signal filtering and amplifying module comprises a comparator U2A and a comparator U2B, a capacitor C43 and a resistor R53 are connected between the pin 1 of the comparator U2A and the pin 6 of the comparator U2B, the pin 1 and the pin 2 of the comparator U2A are connected with the resistor R43 and the capacitor C33 arranged in parallel, and the pin 6 and the pin 7 of the comparator U2B are connected with the resistor R73 and the capacitor C53 arranged in parallel.

[0040] The power pin is connected with VCC / 3.3V, and REF1.5V provides a bias voltage for the non-inverting input end through the resistor R33; the resistor R43 and the capacitor C33 constitute a feedback network, cooperate with the resistor R23, realize the amplification and filtering functions of the input signal, and the capacitor C33 can also improve the frequency response characteristics of the circuit.

[0041] REF1.5V provides a bias for the non-inverting input end through the resistor R63, the resistor R73 and the capacitor C53 constitute a feedback network, further amplify and stabilize the signal, and ensure the stability and accuracy of the output signal.

[0042] The signal conversion module comprises an interface J6 and a chip U5, the pin 1 of the interface J6 is connected with the pin 8 of the chip U5 through the resistor R27, the pin 3 of the interface J6 is connected with the resistor R11 and the light emitting diode LED10 in series, and the signal conversion module further comprises a potentiometer V1, the both ends of the potentiometer V1 are connected with the resistor R16 and the resistor R17 arranged in series and the resistor R18 and the resistor R19 arranged in series in parallel.

[0043] The potentiometer V1 is connected to the pin 7 of the chip U5, the connection end of the resistor R18 and the resistor R19 is connected to the pin 3 of the chip U5, and the connection end of the resistor R16 and the resistor R17 is connected to the pin 2 of the chip U5.

[0044] The resistor R16, the resistor R17, the resistor R18 and the resistor R19 constitute a resistor voltage division network, AIN0 and AIN1 are voltage detection points, different voltage signals are obtained through voltage division; the resistor R17 is a load resistor, the resistor R19 is a negative temperature coefficient thermistor, the interface J6 is used for selecting a DA output path, the DAOUT signal is connected to the light emitting diode LED10 through the resistor R11, and when there is a DA output signal, the light emitting diode LED10 is lighted, and the DA output state can be directly indicated. The pin of the interface J6 is also connected to the AD channel 3 input end, and is used for further processing of the signal.

[0045] The functions of the chip U5 are as follows, among the pins of the chip U5:

[0046] Power supply and filtering: pins 9 (VREF) and 10 (IOVDD) are connected to VCC, and capacitors C12 (104, i.e. 0.1 μF) and C17 (104) are respectively used for power filtering to stabilize the operating voltage of chip U5.

[0047] Communication interface: pins 14 (P20 / SDA) and 16 (P21 / SCL) are I2C communication interfaces for data transmission with a microcontroller; pin 15 (P37 / RD) can be used for data read control.

[0048] Analog signal input: pins 2 (XP), 3 (YP), 4 (XN) and 7 (VBAT) can be used to connect touch screen electrodes or other analog signal sources, and pin 8 (AUX) is connected to AIN3 signal through resistor R27 (104, i.e. 100KΩ) to realize input conversion of analog signals.

[0049] Other control pins: pin 11 (IRQ) is an interrupt request pin, pin 12 (DOUT) is a data output pin, pin 13 (BUSY) indicates the working state of the chip, and pin 15 (CS) is a chip select pin to control whether the chip U5 works.

[0050] According to the data provided by the signal processing module, a fault diagnosis module is used to diagnose faults of the high-voltage connector;

[0051] The fault diagnosis module comprises chip U3, an inductor L1 is connected between pin 1 and pin 5 of the chip U3, a resistor R58 is connected to pin 4 of the chip U3, a capacitor C25 and a capacitor C35 are respectively connected to pin 2 of the chip U3, a diode D2 is connected to pin 1 of the chip U3, resistors R20, R21 and R75 are respectively connected to pin 3 of the chip U3, and resistors R95, capacitor C24 and capacitor C25 are connected in parallel between the connection terminals of the diode D2 and resistor R75 and the connection terminals of resistors R20 and R21.

[0052] Capacitors C25 and C35 form a filter circuit, capacitor C25 is used to filter out low-frequency noise, and capacitor C35 is used to filter out high-frequency noise, so that the voltage input to the subsequent circuit is more stable;

[0053] The pin EN (enable pin) of chip U3 is connected to VCC 5V through R58 (4.7K), and the chip starts to work when the EN pin is at high level; the pin SW (switch pin) is connected to the inductor L1 to control the charging and discharging process of the inductor; the pin FB (feedback pin) is used to detect the output voltage to adjust the working state of the chip and ensure the stability of the output voltage.

[0054] The inductor L1 plays a role of storing and converting energy. The chip U3 controls the on-off of the SW pin to make the inductor L1 charge and discharge, so as to realize voltage conversion.

[0055] A fault isolation module responsible for isolating the faulty part from the entire circuit system;

[0056] The fault isolation module comprises an interface H1, an optocoupler U1, an interface P3, a relay RLY1, an interface P2, a transistor Q1 and a transistor Q2. The relay RLY1 is connected with the interface P2. The 1 pin of the optocoupler U1 is connected in series with a resistor R500 and a light emitting diode D14. The 2 pin of the optocoupler U1 is connected with the 1 pin of the interface H1. The 4 pin of the optocoupler U1 is connected with the base of the transistor Q2 through a resistor R300. The 4 pin of the optocoupler U1 is connected with the emitter of the transistor Q2 through a resistor R200. The 1 pin and the 4 pin of the relay RLY1 are connected with a diode D16. The diode D16 is connected in parallel with a resistor R400 and a light emitting diode D15 in series.

[0057] The diode D14 is connected to VCC1 through the resistor R500, which is used to indicate whether the circuit is powered on. The optocoupler U1 plays a role of electrical isolation. When the input signal makes the transistor Q1 conduct, the light emitting diode in the optocoupler U1 emits light, so that the photosensitive transistor of the optocoupler is turned on, and the signal is transmitted to the right side circuit, while the electrical connection of the two sides is isolated.

[0058] After the optocoupler U1 is turned on, the current passes through the resistor R200 (2.2kΩ) and the resistor R300 (510Ω) to make the transistor Q2 conduct. After the transistor Q2 is turned on, the coil of the relay RLY1 is powered on, and the contact is attracted, which can be used to control the external load.

[0059] The diode D16 is used to protect the relay coil and prevent the reverse electromotive force generated when the power is off from damaging the elements.

[0060] The signal acquisition module, the signal processing module, the fault diagnosis module and the fault isolation module are connected in sequence.

[0061] The signal acquisition module acquires the working state signal of the high-voltage connector and transmits the signal to the signal processing module. The signal processing module processes the received signal, extracts useful fault information, and transmits the processed data to the fault diagnosis module. The fault diagnosis module performs fault diagnosis according to the received data and transmits the diagnosis result to the fault isolation module. The fault isolation module performs fault isolation operation according to the diagnosis result to prevent fault spreading.

[0062] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. High voltage connector fault diagnosis and isolation dedicated circuitry, characterized in that, The utility model relates to a high voltage terminal fault diagnosis system, including: signal acquisition module responsible for collecting high voltage terminal working state signal; Signal processing module for filtering, amplifying and A / D converting the signal output by the signal acquisition module; Fault diagnosis module for diagnosing the fault of the high voltage terminal according to the data provided by the signal processing module; Fault isolation module responsible for isolating the fault part from the entire circuit system; The signal acquisition module, signal processing module, fault diagnosis module and fault isolation module are connected in sequence.

2. The high-voltage connector fault diagnosis and isolation dedicated circuitry of claim 1, characterized in that: The signal acquisition module includes a current voltage acquisition module and a temperature acquisition module, the current voltage acquisition module includes a current transformer TA1 and a voltage transformer TU1, the 2-pin of the current transformer TA1 is connected in series with a resistor R1, a resistor R2 and a capacitor C1, the 4-pin of the voltage transformer TU1 is connected in series with a resistor R5, a resistor R6 and a capacitor C2, and the 2-pin of the current transformer TA1 and the 4-pin of the voltage transformer TU1 are connected.

3. The high-voltage connector fault diagnosis and isolation dedicated circuitry of claim 2, wherein: The temperature acquisition module includes a comparator U14A, a comparator U14B and an interface P30, a resistor R69 is connected between the 1-pin of the comparator U14A and the 5-pin of the comparator U14B, the 2-pin of the comparator U14A is connected with the 1-pin of the interface P30, the 1-pin of the comparator U14A is connected with the 2-pin of the interface P30, a resistor R70 is connected between the 6-pin of the comparator U14B and the 1-pin of the interface P30; The 3-pin of the comparator U14A is connected with a resistor R67 connected with 5V and a parallelly arranged electric receiver VR1 and a diode D27, a resistor R73 is connected between the 6-pin and the 7-pin of the comparator U14B, the 7-pin of the comparator U14B is connected with a resistor R74, one end of the resistor R74 is connected with a parallelly arranged diode D28 and a capacitor C36.

4. The high-voltage connector fault diagnosis and isolation dedicated circuitry of claim 1, wherein: The signal processing module includes a signal filtering and amplifying module and a signal conversion module, the signal filtering and amplifying module includes a comparator U2A and a comparator U2B, a capacitor C43 and a resistor R53 are connected between the 1-pin of the comparator U2A and the 6-pin of the comparator U2B, a resistor R43 and a capacitor C33 are connected in parallel between the 1-pin and the 2-pin of the comparator U2A, a resistor R73 and a capacitor C53 are connected in parallel between the 6-pin and the 7-pin of the comparator U2B.

5. The high-voltage connector fault diagnosis and isolation dedicated circuitry of claim 4, characterized by: The signal conversion module includes an interface J6 and a chip U5, a resistor R27 is connected between the 1-pin of the interface J6 and the 8-pin of the chip U5, a resistor R11 and a light emitting diode LED10 are connected in series at the 3-pin of the interface J6, the signal conversion module further includes a potentiometer V1, the two ends of the potentiometer V1 are connected in parallel with a resistor R16 and a resistor R17 connected in series and a resistor R18 and a resistor R19 connected in series. The potentiometer V1 is connected at the 7-pin of the chip U5, the connection end of the resistor R18 and the resistor R19 is connected at the 3-pin of the chip U5, and the connection end of the resistor R16 and the resistor R17 is connected at the 2-pin of the chip U5.

6. The high-voltage connector fault diagnosis and isolation dedicated circuitry of claim 1, wherein: The fault diagnosis module includes a chip U3, an inductor L1 is connected between the 1st pin and the 5th pin of the chip U3, a resistor R58 is connected to the 4th pin of the chip U3, a capacitor C25 and a capacitor C35 are respectively connected to the 2nd pin of the chip U3, a diode D2 is connected to the 1st pin of the chip U3, a resistor R20, a resistor R21 and a resistor R75 are respectively connected to the 3rd pin of the chip U3, and a resistor R95, a capacitor C24 and a capacitor C25 connected in parallel are connected between the connection end of the diode D2 and the resistor R75 and the connection end of the resistor R20 and the resistor R21.

7. The high-voltage connector fault diagnosis and isolation dedicated circuitry of claim 1, wherein: The fault isolation module includes an interface H1, an optical coupler U1, an interface P3, a relay RLY1, an interface P2, a transistor Q1 and a transistor Q2, the relay RLY1 is connected with the interface P2, a resistor R500 and a light emitting diode D14 are connected in series to the 1st pin of the optical coupler U1, the 2nd pin of the optical coupler U1 is connected with the 1st pin of the interface H1, a resistor R300 is connected between the 4th pin of the optical coupler U1 and the base of the transistor Q2, a resistor R200 is connected between the 4th pin of the optical coupler U1 and the emitter of the transistor Q2, a diode D16 is connected between the 1st pin and the 4th pin of the relay RLY1, and the resistor R400 and the light emitting diode D15 connected in series are connected in parallel across the diode D16.

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