Discharge detection assembly and detection equipment

Abstract

The invention discloses a discharge detection assembly and detection equipment, and relates to the technical field of partial discharge detection, and the discharge detection assembly comprises a microphone, an IEPE sensor and an MCU processor. The microphone can collect sound wave signals generated by partial discharge of the electrical equipment and output corresponding first electric signals. The IEPE sensor can collect a vibration wave signal generated by partial discharge of the electrical equipment and output a corresponding second electric signal. The MCU processor can output a corresponding detection signal according to the first electric signal and / or the second electric signal. Thus, the acoustic wave signal in the air medium generated by partial discharge and the vibration wave signal in the solid medium generated by partial discharge can be detected at the same time, the detection modes are diversified, the detected signal frequency band is wide, and the cost of the detection assembly is low.

Description

Technical Field

[0001] The present invention relates to the technical field of partial discharge detection, and in particular to a discharge detection component and detection equipment. Background Art

[0002] Partial discharge (PD) is a short, pulsed discharge that occurs within the insulation system of electrical equipment when the applied voltage exceeds a certain threshold, occurring in areas that do not fully penetrate the insulating medium. This phenomenon typically occurs when the dielectric is non-uniform, such as when there are bubbles, air gaps, or moisture in the insulation material. The high electric field strength in these non-uniform areas exceeds the breakdown field strength of the insulation material, leading to PD. PD can not only gradually weaken the insulation material but can even cause complete failure of the electrical equipment.

[0003] Existing technologies typically detect partial discharge in insulation systems by capturing information such as electrical pulses, ultrasound, and electromagnetic radiation. However, these partial discharge detection methods are relatively simple and the associated detection equipment is expensive. Summary of the Invention

[0004] The main purpose of the present invention is to provide a discharge detection assembly, aiming to solve the problems of the existing single detection method for partial discharge and the high cost of the supporting detection equipment.

[0005] To achieve the above objectives, the present invention proposes a discharge detection assembly, comprising:

[0006] a microphone, configured to collect acoustic wave signals generated by partial discharge of electrical equipment and output a corresponding first electrical signal;

[0007] IEPE sensor, used to collect vibration wave signals generated by partial discharge of electrical equipment and output a corresponding second electrical signal;

[0008] An MCU processor, wherein a first input end of the MCU processor is connected to an output end of the microphone, a second input end of the MCU processor is connected to an output end of the IEPE sensor, and the MCU processor is configured to output a corresponding detection signal according to the first electrical signal and / or the second electrical signal.

[0009] In one embodiment, the discharge detection component also includes a network port communication module, the first interactive end of the network port communication module is connected to the interactive end of the MCU processor, and the second interactive end of the network port communication module is used to connect to the terminal device; the network port communication module is used to connect data communication between the MCU processor and the terminal device.

[0010] In one embodiment, the discharge detection component further includes:

[0011] a first amplifier circuit, wherein the input end of the first amplifier circuit is connected to the output end of the microphone, and the output end of the first amplifier circuit is connected to the first input end of the MCU processor; the first amplifier circuit is used to amplify the first electrical signal and output it to the MCU processor; and / or,

[0012] A second amplifier circuit, wherein the input end of the second amplifier circuit is connected to the output end of the IEPE sensor, and the output end of the second amplifier circuit is connected to the second input end of the MCU processor; the second amplifier circuit is used to amplify the second electrical signal and output it to the MCU processor.

[0013] In one embodiment, the discharge detection component further includes an analog-to-digital conversion circuit, a first input end of the analog-to-digital conversion circuit is connected to the output end of the microphone, and a second input end of the analog-to-digital conversion circuit is connected to the output end of the IEPE sensor; the analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the first electrical signal and / or the second electrical signal and output the resultant signals.

[0014] In one embodiment, the discharge detection component further includes a power supply circuit, wherein a first power supply terminal of the power supply circuit is connected to a power supply terminal of the microphone, a second power supply terminal of the power supply circuit is connected to a power supply terminal of the IEPE sensor, and a third power supply terminal of the power supply circuit is connected to a power supply terminal of the MCU processor; the power supply circuit is used to output power supply.

[0015] In one embodiment, the network port communication module includes a network port, and the network port is used to connect to a power supply device; the discharge detection component further includes:

[0016] a voltage conversion circuit, wherein a first power input terminal of the voltage conversion circuit is used to connect to an external power input terminal, a first power output terminal of the voltage conversion circuit is connected to the power terminal of the microphone, a second power output terminal of the voltage conversion circuit is connected to the power terminal of the IEPE sensor, and a third power output terminal of the voltage conversion circuit is connected to the power terminal of the power supply circuit;

[0017] A POE power supply circuit, wherein the power input end of the POE power supply circuit is connected to the network port, the power output end of the POE power supply circuit is connected to the second power input end of the voltage conversion circuit, and the POE power supply circuit is used to transmit the POE power provided by the power supply device;

[0018] The voltage conversion circuit is used to convert the external power supply voltage input from the external power supply input terminal and / or the POE power output from the POE power supply circuit into a voltage and then output it.

[0019] In one embodiment, the POE power supply circuit includes:

[0020] A polarity conversion circuit, connected to the network port, configured to receive POE power from a power supply device and convert the polarity of the POE power before outputting it;

[0021] a clamping protection circuit, the clamping protection circuit being connected to the second power input terminal of the polarity conversion circuit and the voltage conversion circuit, respectively; the clamping protection circuit being configured to open a path between the polarity conversion circuit and the voltage conversion circuit when the voltage of the POE power output by the polarity conversion circuit is less than or equal to a preset voltage, and to disconnect the path between the polarity conversion circuit and the voltage conversion circuit when the voltage of the POE power output by the polarity conversion circuit is greater than the preset voltage;

[0022] A POE power matching circuit, wherein the POE power matching circuit is respectively connected to the polarity conversion circuit and the second power input terminal of the voltage conversion circuit; the POE power matching circuit is used to output an identification signal to the power supply device, and receive a corresponding feedback signal from the power supply device, and when it is determined according to the feedback signal that the access standard of the power supply device matches the preset standard, control the access of the POE power to the second power input terminal of the voltage conversion circuit.

[0023] In one embodiment, the discharge detection component includes a first amplifier circuit, which includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor, and a first amplifier;

[0024] Among them, one end of the first capacitor is connected to the output end of the microphone; the other end of the first capacitor is connected to one end of the first resistor; the other end of the first resistor and the positive input end of the first amplifier are connected to the first power supply end of the first amplifier circuit; the inverting input end of the first amplifier, one end of the second resistor, and one end of the third resistor are connected to the second power supply end of the first amplifier circuit; the other end of the second resistor is connected to one end of the second capacitor, and the other end of the second capacitor is grounded; the output end of the first amplifier and the other end of the third resistor are connected to one end of the third capacitor; the other end of the third capacitor is connected to one end of the fourth resistor; and the other end of the fourth resistor is connected to the output end of the first amplifier circuit.

[0025] In one embodiment, the discharge detection component includes a second amplifying circuit, which includes a first variable resistor, a second variable resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor, and a second amplifier;

[0026] Among them, one end of the first variable resistor and one end of the second variable resistor are connected to the first output end of the IEPE sensor; the other end of the first variable resistor, one end of the fifth resistor, and one end of the fourth capacitor are grounded; the other end of the fifth resistor and one end of the sixth resistor are connected to the second output end of the IEPE sensor; the other end of the second variable resistor and the other end of the sixth resistor are connected to one end of the seventh resistor; the other end of the seventh resistor and the non-inverting input end of the second amplifier are connected to the first power supply end of the second amplifier circuit; the inverting input end of the second amplifier and one end of the eighth resistor are connected to one end of the ninth resistor; the other end of the eighth resistor is connected to the other end of the fourth capacitor; the output end of the second amplifier and the other end of the ninth resistor are connected to one end of the fifth capacitor; the other end of the fifth capacitor is connected to one end of the tenth resistor; and the other end of the tenth resistor is connected to the output end of the second amplifier circuit.

[0027] The present invention further provides a detection device, which includes the discharge detection component as described above.

[0028] The technical solution of the present invention utilizes a discharge detection component comprising a microphone, an IEPE (Integrated Electronics Piezo-Electric) sensor, and an MCU processor. Different components are used to collect signals within the frequency spectrum generated by partial discharge in electrical equipment. The acoustic waves generated by arcing in electrical equipment are primarily air vibrations, which are collected using a microphone and output as a corresponding first electrical signal. Arc flashes caused by internal defects in contactors are primarily infrasound and ultrasonic signals, which propagate through solid surfaces. Based on Hooke's law, these signals are collected using an IEPE sensor and output as a corresponding second electrical signal. The MCU processor can output a corresponding detection signal based on the collected first and / or second electrical signals. In this way, the present invention can simultaneously detect acoustic wave signals in the air medium generated by partial discharge and vibration wave signals in the solid medium, providing diverse detection methods. It can simultaneously detect acoustic, infrasound, and ultrasonic waves generated by partial discharge, with a wide signal detection frequency band. Using a microphone and IEPE sensor for signal collection reduces the cost of the detection components. Thus, compared to the prior art, the present invention addresses the issues of relatively limited existing partial discharge detection methods and the high cost of supporting detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a discharge detection assembly provided by the present invention;

[0031] Figure 2 A schematic structural diagram of another embodiment of a discharge detection assembly provided by the present invention;

[0032] Figure 3 An electronic circuit diagram of a first amplifier circuit and a second amplifier circuit of an embodiment of a discharge detection assembly provided by the present invention;

[0033] Figure 4 An electronic circuit diagram of an analog-to-digital conversion circuit of an embodiment of a discharge detection assembly provided by the present invention;

[0034] Figure 5 An electronic circuit diagram of an MCU processor of an embodiment of a discharge detection component provided by the present invention;

[0035] Figure 6 An electronic circuit diagram of a network switch processor of an embodiment of a discharge detection component provided by the present invention;

[0036] Figure 7 This is an electronic circuit diagram of the network port communication module and power supply circuit of an embodiment of the discharge detection component provided by the present invention.

[0037] Description of Figure Numbers:

[0038]

[0039] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] Before introducing the technical solution involved in the present invention, some terms included in the present invention are first introduced.

[0044] IEPE sensor: An IEPE (Integrated Electronics Piezo-Electric) sensor is a sensor used to measure dynamic physical quantities such as acceleration, vibration, and pressure. It incorporates signal conditioning circuitry and uses piezoelectric materials (such as quartz or ceramic) to convert mechanical stress into an electrical signal. When an external force is applied to the sensor, the piezoelectric material generates an electric charge, generating a voltage signal proportional to the applied force. This low-noise sensor provides higher measurement accuracy.

[0045] MCU processor: MCU (Microcontroller Unit) processor is an integrated circuit that integrates a computer processor, memory, peripheral interfaces and other functional modules. It has the characteristics of low power consumption, compactness and low cost.

[0046] POE (Power over Ethernet) is a technology that simultaneously transmits power and data over Ethernet network cables. It allows network devices to be powered without additional power cables, simplifying device installation and management. When transmitting power, POE transmits power over standard Ethernet cables (such as Cat5e and Cat6), providing up to 15.4W (802.3af standard), 30W (802.3at standard, commonly known as POE+), or higher (802.3bt standard, up to 60W or 90W).

[0047] PCM: PCM (Pulse Code Modulation) is an effective method for digitizing analog signals. It converts continuous signals into discrete digital signals through sampling, quantization, and encoding steps.

[0048] IIS: IIS (Inter-IC Sound) is a standard interface for transmitting audio data between integrated circuits, mainly used for the transmission of digital audio signals.

[0049] SPI: SPI (Serial Peripheral Interface) is a full-duplex communication protocol that uses four signal lines. It is fast and suitable for short-distance, high-speed data transmission.

[0050] IIC: (Inter-Integrated Circuit, Serial Peripheral Interface), a bidirectional communication protocol that uses two signal lines to support multiple device connections. It is slower but simpler and suitable for low-speed applications.

[0051] ALC: ALC (Automatic Level Control) is a technology used in audio processing that automatically adjusts the signal amplitude to keep the output signal within a preset range.

[0052] MAC: MAC (Media Access Control), part of the network protocol, is responsible for controlling device access rights on a shared communication medium. It ensures the correct transmission and reception of data frames and prevents data conflicts.

[0053] ID: ID (Identification), identification.

[0054] TCP / IP protocol: A set of standard protocols for Internet and computer network communications, widely used for data transmission.

[0055] It should be noted that partial discharge (PD) refers to discharge in certain areas of an insulating material due to excessively high electric field strength under the action of an electric field, without forming a continuous discharge channel. This is primarily due to the uneven electric field distribution within the insulation system. For example, the presence of bubbles can lead to concentrated electric fields. Since air has a low dielectric constant, when the electric field passes through these bubbles or water-containing areas, the electric field intensity is concentrated there, exceeding the material's tolerance, causing discharge in these localized areas. Existing technologies generally detect partial discharge in insulation systems by capturing information such as electric pulses, ultrasound, and electromagnetic radiation. However, existing methods for detecting partial discharge are relatively simple, and the cost of the accompanying detection equipment is high.

[0056] The present invention provides a discharge detection component.

[0057] See also Figure 1 In one embodiment of the present invention, the discharge detection component includes:

[0058] The microphone 10 is used to collect the sound wave signal generated by the partial discharge of the electrical equipment and output a corresponding first electrical signal.

[0059] It should be noted that the microphone 10 can be a condenser microphone that can collect sound wave signals with a frequency of 200Hz to 20kHz generated by partial discharge. The condenser microphone 10 can be composed of a diaphragm and a fixed backplate. A capacitor is formed between the diaphragm and the backplate. When a sound wave (such as a sound wave generated by partial discharge) hits the diaphragm, the diaphragm will undergo a slight displacement, thereby changing the capacitance value between the diaphragm and the backplate. This change is proportional to the sound wave pressure, and a voltage signal proportional to the sound wave signal can be generated, that is, a first electrical signal.

[0060] It should be noted that in electrical equipment, areas with high electric field strength (such as the contact points of electrodes or capacitors) and areas with insulation material defects (such as seams, edges, or aging areas) are prone to partial discharge. Therefore, microphone 10 can be installed near these areas to effectively capture the sound waves generated by partial discharge.

[0061] The IEPE sensor 20 is used to collect vibration wave signals generated by partial discharge of electrical equipment and output a corresponding second electrical signal.

[0062] It should be noted that IEPE (Integrated Electronics Piezo-Electric) sensors can collect vibration wave signals generated by partial discharge with frequencies ranging from 5Hz to 96kHz, including infrasonic signals ranging from 5Hz to 20Hz, acoustic signals ranging from 20Hz to 20kHz, and ultrasonic signals ranging from 20kHz to 96kHz. These vibration waves primarily propagate through solid media. The IEPE sensor 20 utilizes the piezoelectric effect, whereby piezoelectric materials generate an electric charge when subjected to force. The mechanical stress caused by the vibration wave generates a voltage on the piezoelectric material that is proportional to the applied stress, generating a voltage signal proportional to the vibration wave signal, i.e., a second electrical signal.

[0063] It should be noted that in electrical equipment, areas with high electric field strength (such as the contact points of electrodes or capacitors) and areas with insulation material defects (such as seams, edges, or aging areas) are prone to partial discharge. Therefore, IEPE sensors 20 can be installed on solid materials in these areas to effectively capture the vibration waves generated by partial discharge.

[0064] The MCU processor 30 has a first input end connected to the output end of the microphone 10, and a second input end connected to the output end of the IEPE sensor 20. The MCU processor 30 is configured to output a corresponding detection signal according to the first electrical signal and / or the second electrical signal.

[0065] In this embodiment, different components are used to collect signals within the spectrum generated by partial discharge in electrical equipment. The acoustic waves generated by arcing in electrical equipment are primarily air vibrations, which are collected using a high-sensitivity capacitor microphone 10 and output as a corresponding first electrical signal. Arc flashes caused by internal defects in contactors are primarily infrasound and ultrasonic signals, which propagate through solid surfaces. Based on Hooke's law, these signals are collected using an IEPE sensor 20 and output as a corresponding second electrical signal. The MCU processor 30 can output a corresponding detection signal based on the collected first and / or second electrical signals. In this way, the present invention can simultaneously detect acoustic wave signals in the air medium generated by partial discharge and vibration wave signals in the solid medium, providing diverse detection methods. It can simultaneously detect acoustic, infrasound, and ultrasonic waves generated by partial discharge, covering a wide frequency band. Using a microphone 10 and an IEPE sensor 20 for signal collection reduces the cost of the supporting components. Thus, compared to the prior art, this embodiment addresses the issues of relatively limited detection methods for partial discharge and the high cost of supporting detection equipment.

[0066] In the present invention, different components are used to collect signals within the spectrum generated by partial discharge in electrical equipment. The acoustic waves generated by arcing in electrical equipment are primarily air vibrations, which are collected using a high-sensitivity capacitor microphone 10 and output as a corresponding first electrical signal. Arc flashes caused by internal defects in contactors are primarily infrasound and ultrasonic signals, which propagate through solid surfaces. Based on Hooke's law, these signals are collected using an IEPE sensor 20 and output as a corresponding second electrical signal. The MCU processor 30 can output a corresponding detection signal based on the collected first and / or second electrical signals. In this way, the present invention can simultaneously detect acoustic wave signals in the air medium generated by partial discharge and vibration wave signals in the solid medium, providing diverse detection methods. It can simultaneously detect acoustic, infrasound, and ultrasonic waves generated by partial discharge, covering a wide frequency range. Using a microphone 10 and an IEPE sensor 20 for signal collection reduces the cost of the supporting components. Thus, compared to the prior art, the present invention addresses the issues of relatively limited detection methods for partial discharge and the high cost of supporting detection equipment.

[0067] See also Figure 2In one embodiment of the present invention, the discharge detection component also includes an Ethernet communication module 40, a first interactive end of the Ethernet communication module 40 is connected to an interactive end of the MCU processor 30, and a second interactive end of the Ethernet communication module 40 is used to connect to a terminal device; the Ethernet communication module 40 is used to connect data communication between the MCU processor 30 and the terminal device.

[0068] In this embodiment, the network port communication module 40 includes a network switch processor 42 and a network port 41. Figure 5 , MCU processor 30 includes MCU chip U2. Figure 6 , the network switching processor 42 includes an Ethernet chip U3. Figure 7 , the network port 41 includes a network transformer U4 and a first interface J1 connected to an external network switching device, wherein the network switching device may include a terminal device for data interaction and / or a power supply device for providing POE power. It should be noted that the Ethernet chip U3 can handle the forwarding and switching of network data packets, can parse the target address of the data packet, and can route the data packet to the correct terminal device according to the network protocol (such as the Ethernet protocol), that is, the detection signal output by the MCU chip U2 can be sent to the correct terminal device. Among them, the network transformer U4 is used for electrical isolation to protect the circuit on one side of the Ethernet chip U3 from electromagnetic interference. In this way, in this embodiment, the detection signal can be output through network transmission, and the user can obtain relatively stable characteristic data of the detection signal from the terminal device, such as amplitude, frequency, waveform and other data, and compare the extracted features with the known partial discharge features to identify partial discharge events for qualitative and quantitative analysis.

[0069] See also Figure 2 In one embodiment of the present invention, the discharge detection component further includes a first amplifier circuit 50, the input end of the first amplifier circuit 50 is connected to the output end of the microphone 10, and the output end of the first amplifier circuit 50 is connected to the first input end of the MCU processor 30; the first amplifier circuit 50 is used to amplify the first electrical signal and output it to the MCU processor 30.

[0070] See also Figure 3 The first amplifier circuit 50 includes a first resistor R101 , a second resistor R102 , a third resistor R103 , a fourth resistor R104 , a first capacitor C101 , a second capacitor C102 , a third capacitor C103 and a first amplifier OP1 .

[0071] Among them, one end of the first capacitor C101 is connected to the output end of the microphone 10; the other end of the first capacitor C101 is connected to one end of the first resistor R101; the other end of the first resistor R101 and the non-inverting input end of the first amplifier OP1 are connected to the first power supply end of the first amplifier circuit 50; the inverting input end of the first amplifier OP1, one end of the second resistor R102, and one end of the third resistor R103 are connected to the second power supply end of the first amplifier circuit 50; the other end of the second resistor R102 is connected to one end of the second capacitor C102, and the other end of the second capacitor C102 is grounded; the output end of the first amplifier OP1, the other end of the third resistor R103 are connected to one end of the third capacitor C103; the other end of the third capacitor C103 is connected to one end of the fourth resistor R104; and the other end of the fourth resistor R104 is connected to the output end of the first amplifier circuit 50.

[0072] In this embodiment, the first amplifying circuit 50 includes an input filter circuit, an amplifier, a gain adjustment circuit, and an output filter circuit. The first capacitor C101 and the first resistor R101 constitute the input filter circuit, and the first amplifier OP1 amplifies the first electrical signal output by the microphone 10. The second resistor R102, the third resistor R103, and the second capacitor C102 constitute a gain adjustment circuit, which can adjust the amplification gain of the first amplifier OP1 on the first electrical signal. The third capacitor C103 and the fourth resistor R104 constitute an output filter circuit. In this way, this embodiment can filter and amplify the weak first electrical signal output by the microphone 10 before outputting it. The signal has strong anti-interference capabilities, and the collected first electrical signal is relatively accurate.

[0073] See also Figure 2 In one embodiment of the present invention, the discharge detection component further includes a second amplifier circuit 60, the input end of the second amplifier circuit 60 is connected to the output end of the IEPE sensor 20, and the output end of the second amplifier circuit 60 is connected to the second input end of the MCU processor 30; the second amplifier circuit 60 is used to amplify the second electrical signal and output it to the MCU processor 30.

[0074] See also Figure 3 The second amplifier circuit 60 includes a first variable resistor RV1, a second variable resistor RV2, a fifth resistor R105, a sixth resistor R106, a seventh resistor R107, an eighth resistor R108, a ninth resistor R109, a tenth resistor R110, a fourth capacitor C104, a fifth capacitor C105 and a second amplifier OP2.

[0075] Among them, one end of the first variable resistor RV1 and one end of the second variable resistor RV2 are connected to the first output end of the IEPE sensor 20; the other end of the first variable resistor RV1, one end of the fifth resistor R105, and one end of the fourth capacitor C104 are grounded; the other end of the fifth resistor R105 and one end of the sixth resistor R106 are connected to the second output end of the IEPE sensor 20; the other end of the second variable resistor RV2 and the other end of the sixth resistor R106 are connected to one end of the seventh resistor R107; the other end of the seventh resistor R107 is connected to the second amplifier O The non-inverting input terminal of P2 is connected to the first power supply terminal of the second amplifier circuit 60; the inverting input terminal of the second amplifier OP2, one end of the eighth resistor R108, and one end of the ninth resistor R109 are connected; the other end of the eighth resistor R108 is connected to the other end of the fourth capacitor C104; the output terminal of the second amplifier OP2, the other end of the ninth resistor R109, and one end of the fifth capacitor C105 are connected; the other end of the fifth capacitor C105 is connected to one end of the tenth resistor R110; and the other end of the tenth resistor R110 is connected to the output terminal of the second amplifier circuit 60.

[0076] In this embodiment, the second amplifier circuit 60 includes an input circuit, an amplifier, a gain adjustment circuit, and an output filter circuit. The input circuit, comprised of a first variable resistor RV1, a second variable resistor RV2, a fifth resistor R105, and a sixth resistor R106, can be used to capture the differential pressure across the IEPE sensor 20. The sensitivity of the IEPE sensor 20's output can be adjusted by adjusting the first and second variable resistors RV1 and RV2. The seventh resistor R107 ensures that the input second electrical signal is within an appropriate range, preventing amplifier saturation caused by excessive input. The second amplifier OP2 amplifies the first electrical signal output by the IEPE sensor 20. The eighth resistor R108, the ninth resistor R109, and the fourth capacitor C104 form a gain adjustment circuit that adjusts the amplification gain of the second amplifier OP2 for the second electrical signal. The fifth capacitor C105 and the tenth resistor R110 form an output filter circuit. In this manner, this embodiment converts the second electrical signal output by the IEPE sensor 20 into a differential pressure signal, which is then filtered and amplified for output. This signal exhibits strong anti-interference capabilities, resulting in a more accurate captured second electrical signal.

[0077] See also Figure 2 In one embodiment of the present invention, the discharge detection component further includes an analog-to-digital conversion circuit 70, wherein a first input end of the analog-to-digital conversion circuit 70 is connected to the output end of the microphone 10, and a second input end of the analog-to-digital conversion circuit 70 is connected to the output end of the IEPE sensor 20; the analog-to-digital conversion circuit 70 is configured to perform analog-to-digital conversion on the first electrical signal and / or the second electrical signal and output the resultant signals.

[0078] See also Figure 4In this embodiment, the analog-to-digital conversion circuit 70 includes an analog-to-digital converter U1. The first input port AL of the analog-to-digital converter can receive a first electrical signal output by the microphone 10, and the second input port AR of the analog-to-digital converter can receive a second electrical signal output by the IEPE sensor 20. The analog-to-digital converter U1 can convert the two analog input signals into digital PCM signals for output. Data is exchanged with the MCU processor 30 via the MCLK (master clock), SCLK (serial clock), LCLK (data latch clock), SDI (serial data input), and SDO (serial data output) ports, and the digital PCM is output to the MCU processor 30. Thus, in this embodiment, the PCM signal can better preserve the information of the original analog signal. Compared with analog signals, digital signals are more resistant to noise and interference, making them easier to process, store, and transmit.

[0079] See also Figure 2 In one embodiment of the present invention, the discharge detection assembly further includes a power supply circuit 80. A first power terminal of the power supply circuit 80 is connected to a power terminal of the microphone 10, a second power terminal of the power supply circuit 80 is connected to a power terminal of the IEPE sensor 20, and a third power terminal of the power supply circuit 80 is connected to a power terminal of the MCU processor 30. The power supply circuit 80 is configured to output power. In this embodiment, the power supply circuit 80 converts an external power supply voltage into an operating voltage for the microphone 10, the IEPE sensor 20, and the MCU processor 30, and then outputs the voltage. In this manner, this embodiment can provide power to the microphone 10, the IEPE sensor 20, and the MCU processor 30.

[0080] See also Figure 2 In one embodiment of the present invention, the network port communication module 40 includes a network port 41, which is used to connect to a power supply device; the discharge detection component also includes:

[0081] A voltage conversion circuit 81, wherein a first power input terminal of the voltage conversion circuit 81 is connected to an external power input terminal, a first power output terminal of the voltage conversion circuit 81 is connected to a power terminal of the microphone 10, a second power output terminal of the voltage conversion circuit 81 is connected to a power terminal of the IEPE sensor 20, and a third power output terminal of the voltage conversion circuit 81 is connected to a power terminal of the power supply circuit 80;

[0082] A POE power supply circuit 82, wherein the power input terminal of the POE power supply circuit 82 is connected to the network port 41, and the power output terminal of the POE power supply circuit 82 is connected to the second power input terminal of the voltage conversion circuit 81. The POE power supply circuit 82 is used to transmit the POE power provided by the power supply device;

[0083] The voltage conversion circuit 81 is used to convert the external power voltage input from the external power input terminal and / or the POE power output from the POE power supply circuit 82 into a voltage and then output it.

[0084] In this embodiment, the discharge detection component has two power supply options: an external power source and an external power supply device. This provides more diverse power supply options, allowing users to choose between external power supply and POE power supply to suit different environments and needs. This dual power supply option ensures that the system can continue to operate normally even if one power source fails, improving overall reliability.

[0085] See also Figure 7 In this embodiment, the voltage conversion circuit 81 may include a first diode D1, a voltage-stabilizing capacitor C502, a voltage conversion chip U8, a second transient voltage suppressor diode TVS2, an inductor L1, a capacitor C504, a capacitor C505, and a capacitor C506. The external power supply voltage can be input through the second interface J2. The first diode D1 effectively filters the inverted input voltage, ensuring the unidirectional flow of voltage and ensuring that the voltage conversion chip U8 inputs a unidirectional DC voltage. After being stabilized by the voltage-stabilizing capacitor C502, the input voltage is transmitted to the voltage conversion chip U8 for necessary voltage conversion. The converted voltage is filtered by the circuit composed of the inductor L1, capacitor C504, capacitor C505, and capacitor C506 for output power supply, ensuring output stability. The second transient voltage suppressor diode TVS2 is responsible for limiting the input voltage to not exceed the set safety threshold, thereby effectively protecting the subsequent circuit and improving power supply reliability and safety. In this way, this embodiment can effectively convert the external power supply voltage and / or the POE power output by the POE power supply circuit 82 into voltage and output it.

[0086] See also Figure 7 In one embodiment of the present invention, the POE power supply circuit 82 includes:

[0087] The polarity conversion circuit is connected to the network port 41 and is used to receive the POE power provided by the power supply device and perform polarity conversion on the POE power before outputting it.

[0088] It should be noted that there are many types of power supply devices, and the positive and negative polarity of the input power of different power supply devices may be different, that is, the positive and negative polarity of the power input to the power supply device is uncertain. In this embodiment, the network port 41 can include a network transformer U4 and a first interface J1. The polarity conversion circuit can include a first bridge rectifier U5 and a second bridge rectifier U6.

[0089] Among them, pins TX+, TX-, RX+, and RX- of the network transformer U4 are respectively connected to pins 1, 2, 3, and 6 of the first interface J1, and pins CT3 and CT4 of the network transformer U4 are respectively connected to the first power supply terminal and the second power supply terminal of the first bridge rectifier U5. Pins 4 and 5 of the first interface J1 are both connected to the first power supply terminal of the second bridge rectifier U6, and pins 7 and 8 of the first interface J1 are both connected to the second power supply terminal of the second bridge rectifier U6. The positive power supply terminal (pin V+) of the first bridge rectifier U5 is connected to the positive power supply terminal (pin V+) of the second bridge rectifier U6, and the negative power supply terminal (pin V-) of the first bridge rectifier U5 is connected to the negative power supply terminal (pin V-) of the second bridge rectifier U6. In this way, the first bridge rectifier U5 and the second bridge rectifier U6 can convert the polarity of POE power supplies of different polarities and output them.

[0090] A clamping protection circuit, the clamping protection circuit is connected to the second power input terminal of the polarity conversion circuit and the voltage conversion circuit 81 respectively; the clamping protection circuit is used to connect the path between the polarity conversion circuit and the voltage conversion circuit 81 when the voltage of the POE power output by the polarity conversion circuit is less than or equal to the preset voltage, and disconnect the path between the polarity conversion circuit and the voltage conversion circuit 81 when the voltage of the POE power output by the polarity conversion circuit is greater than the preset voltage.

[0091] It should be noted that the clamping protection circuit may include a first transient voltage suppressor diode TVS1 and a first fuse F1.

[0092] The input end of the first fuse F1 is connected to the positive power supply end of the first bridge rectifier U5 and the positive power supply end of the second bridge rectifier U6. The output end of the first fuse F1 and the cathode of the first transient voltage suppressor diode TVS1 are connected to the second power supply input end of the voltage conversion circuit 81. The anode of the first transient voltage suppressor diode TVS1 is connected to the negative power supply end of the first bridge rectifier U5 and the negative power supply end of the second bridge rectifier U6. At this time, if the voltage of the output POE power supply is less than or equal to the preset voltage, the cathode to anode of the first transient voltage suppressor diode TVS1 is disconnected, and the first fuse F1 normally conducts the path between the polarity conversion circuit and the voltage conversion circuit 81. If the voltage of the output POE power supply is greater than the preset voltage, the cathode to anode of the first transient voltage suppressor diode TVS1 is connected, and the transient current is too large, and the first fuse F1 disconnects the path between the polarity conversion circuit and the voltage conversion circuit 81.

[0093] The POE power matching circuit is connected to the polarity conversion circuit and the second power input terminal of the voltage conversion circuit 81 respectively; the POE power matching circuit is used to output an identification signal to the power supply device, and receive a corresponding feedback signal from the power supply device, and when it is determined that the access standard of the power supply device matches the preset standard based on the feedback signal, it controls the access of the POE power to the second power input terminal of the voltage conversion circuit 81.

[0094] It should be noted that different power supply devices may correspond to different power supply standards. For example, the IEEE 802.3af standard can provide 48V DC power with a maximum power of 15.4W; the IEEE 802.3at standard can provide 48V DC power with a maximum power of 30W; and the IEEE 802.3bt standard can provide 48V DC power with a maximum power of 60W / 90W. In this embodiment, the POE power matching circuit can match the access standard of the power supply device according to a preset standard. When the match is successful, the POE power is connected to the second power input terminal of the voltage conversion circuit 81 to supply power.

[0095] It should be noted that the POE power matching circuit may include a resistor R505, a resistor R506, a resistor R507 and a power management chip U7. Among them, one end of the resistor R505, one end of the resistor R506, and one end of the resistor R507 are respectively connected to pin 1, pin 2, and pin 3 of the power management chip U7, the other end of the resistor R505, the other end of the resistor R506, the other end of the resistor R507, and pin 4 of the power management chip U7 are all connected to the negative power supply end of the first bridge stack U5 and the negative power supply end of the second bridge stack U6, the pin 5 of the power management chip U7 is grounded, and the pin 6 of the power management chip U7 is connected to the output end of the first fuse F1. Among them, the power management chip U7 pre-stores matching information. When the network port 41 is connected to the power supply device, the power management chip U7 outputs an identification signal through pin 1, pin 2, and pin 3. After the identification signal passes through the polarity conversion circuit, it is output to the power supply device through the network port 41. The power supply device outputs a corresponding feedback signal according to its own access standard. The feedback signal is input to the polarity conversion circuit through the network port 41, and is output to the power supply management chip U7 after passing through the polarity conversion circuit. At this time, the power supply management chip U7 confirms based on the feedback signal whether the access standard of the power supply device matches the pre-stored matching information. If it matches, the internal switch is controlled to turn on the path between pin 4 and pin 5, so that a feed power loop can be established between the positive power supply end of the first bridge stack U5, the positive power supply end of the second bridge stack U6 and the negative power supply end of the first bridge stack U5, the negative power supply end of the second bridge stack U6, that is, the POE power supply is connected to the second power input end of the voltage conversion circuit 81 for power supply. If it does not match, the internal switch is controlled to disconnect the path between pin 4 and pin 5, so that the feed power loop cannot be established between the second positive end and the second negative end of the polarity conversion circuit, and the POE power supply is not connected for power supply. In this way, this embodiment can realize the power supply of the POE power supply, and the power supply flexibility is relatively strong.

[0096] See also Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 In one embodiment of the present invention, the specific principles of the present invention are described as follows:

[0097] The present invention aims to provide a discharge detection component that can detect infrasound, sound waves and ultrasonic waves generated by partial discharge, involving the detection of partial discharge in the 5HZ-96kHz spectrum, and outputting corresponding detection signals, which are digitally converted and then transmitted through the network.

[0098] It should be noted that U1 is a dual-channel 192K / 24-bit precision analog-to-digital converter, which is responsible for converting the front-end analog signal into a digital signal, encoding it into a dual-channel PCM code stream, and transmitting it to U2 through the IIS bus.

[0099] U2 is the core processing chip of the device, responsible for coordinating data format conversion, converting IIS signals into SPI signals, and transmitting them to U3 via the data bus. U2 initializes and configures U1 via the IIC bus, configuring U1's analog signal gain, channel selection, ALC control, sampling rate, and sampling bit number. U2 configures U3's MAC address, ID, and TCP / IP protocol via the SPI bus, resets U3, and responds to U3's interrupt information.

[0100] U3 is an Ethernet chip with a full hardware TCP / IP protocol stack. It is responsible for receiving the protocol data processed by U2, receiving it through the SPI bus, and transmitting it to the corresponding network receiving device through the network layer.

[0101] When the discharge detection assembly is operating, microphone 10 collects acoustic wave signals generated by partial discharge in electrical equipment and propagating through the air. These signals are then amplified in positive phase by the first operational amplifier of first amplifier circuit 50 and output to port AL. IEPE sensor 20 collects vibration wave signals generated by partial discharge within the electrical equipment and propagating through solid materials, such as cabinets or metal surfaces. These signals are then amplified by second amplifier circuit 60, such as a precision instrumentation amplifier, and output to port AR. The third operational amplifier OP3, along with resistors R115 and R116, capacitors C106, C107, and C108, form a 1.65V power supply, providing a reference voltage for first amplifier circuit 50 and second amplifier circuit 60. Therefore, microphone 10 and IEPE sensor 20 can simultaneously detect acoustic, infrasonic, and ultrasonic waves generated by partial discharge, covering a wide frequency range.

[0102] The first electrical signal amplified by the first amplifier circuit 50 is output to U1 via the AL port, and the second electrical signal amplified by the second amplifier circuit 60 is output to U1 via the AR port. Pins 4 and 5 of U1 are configuration pins for U1's IIC. Through these configuration pins, U2 can configure U1's analog signal amplification factor, ALC control, sampling frequency, and number of sampling bits. After U1 is powered on and initialized, the collected analog signal is converted into a digital PCM signal and transmitted to U2 via the IIS bus formed by U1's pins 6, 7, 8, 8, and 10. Therefore, the first and second electrical signals can be filtered, amplified, and then output, with strong anti-interference capabilities and relatively accurate collected first and second electrical signals.

[0103] U2 initializes and configures U3 and U1. It initializes and configures U1 via the IIC bus formed by U1's pins 4 and 5. After configuration is complete, it receives the PCM stream output by U1. It then converts U1's PCM stream into SPI data and transmits it to U3. It configures U3's MAC address and IP address via the SPI bus formed by U2's pins 10, 11, 12, and 13. U3 is reset via pin 8, and U3 interrupts are responded to via pin 10. After power-on initialization is complete, collected data begins to be transmitted via the SPI bus.

[0104] U3 is an Ethernet chip. Pins 4, 5, 6, and 7 of U3 form the SPI bus port, which receives data and initializes configuration from U2. Pin 3 forms the interrupt port. After the component is connected to the network, the interrupt outputs a high level to U2, causing U2 to start outputting data. Pin 2 forms the reset port. After power is applied, if U2 and U3 do not receive a response during the handshake, a reset signal from U2 is received to confirm U3's normal operating status. Pins 8, 9, 10, and 11 form the differential network transceiver interface, which completes data transmission after the component is connected to the network. Therefore, the detection signal can be output via network transmission, allowing users to obtain relatively stable detection signal characteristic data from the terminal device, thereby conducting qualitative and quantitative analysis.

[0105] U5 and U6 are the first and second bridge rectifiers, respectively, and U7 is a power management chip. In the power supply module, this embodiment specifically includes a voltage conversion circuit 81 and a POE power supply circuit 82, providing two power feeding methods. In one power supply method, the POE power supply of the power supply device is connected to the second bridge rectifier U6 via pins 4, 5, 7, and 8 of the first interface J1, and to the first bridge rectifier U5 via the CT3 and CT4 pins of the network transformer U4. After the polarity of the two input POE power supplies is converted by U5 / U6, they are output to the second power input terminal of the voltage conversion circuit 81. Among them, pins 1, 2, and 3 of U7 are connected to resistors R505, R506, and R507, respectively, forming a POE power matching circuit. This circuit confirms with the power supply device whether its access standard matches. If it matches, the path between pins 4 and 5 is opened, and the negative poles of U5 and U6 are grounded. Then, a feed power loop can be established between the positive power supply terminal of the first bridge stack U5 and the positive power supply terminal of the second bridge stack U6 and the negative power supply terminal of the first bridge stack U5 and the negative power supply terminal of the second bridge stack U6. This feed loop is established to connect the POE power to the second power input terminal of the voltage conversion circuit 81. Otherwise, no feed loop is established to connect the POE power. The POE power supply can be a 48-55V / 500mA power supply. Among them, if the voltage of the connected POE power supply is greater than the preset voltage, such as greater than 60V, TVS1 reverse conducts, the instantaneous current increases, and the first fuse F1 disconnects the connected POE power input to the second power input terminal of the voltage conversion circuit 81. If the voltage of the connected POE power supply is less than or equal to the preset voltage, the connected POE power supply can be safely input to the second power input terminal of the voltage conversion circuit 81. Therefore, TVS1 and F1 can clamp the output of the POE power supply below the safe voltage, thereby enhancing safety.

[0106] U8 is a voltage conversion chip that provides a safe 3.3V DC power supply for components. U8 uses a switching step-down method. POE power / external power is input from pin 1 of U2 and output through pin 4. It is then filtered by the first inductor L1, capacitors C504, C505, and C506 before outputting a 3.3V DC power supply. The external power supply can be a 12V DC power supply, input through the second interface J2, polarity-protected by diode D1, and then input to pin 1 of U8. Therefore, this embodiment offers a wider range of power supply options, allowing users to choose between external power or POE power supply to suit different environments and needs.

[0107] Thus, the discharge detection assembly provided by this embodiment has strong anti-interference capabilities, can obtain quantitative detection results of the discharge of electrical equipment based on the output detection signal, and is relatively low-cost. Compared with the existing technology, it solves the problems of the existing partial discharge detection methods being relatively simple and the supporting detection equipment being relatively expensive.

[0108] The present invention also proposes a detection device, which includes a discharge detection component. The specific structure of the discharge detection component refers to the above-mentioned embodiment. Since this detection device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0109] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A discharge detection component, characterized in that: include: A microphone, used to collect sound wave signals generated by partial discharge of electrical equipment and output a corresponding first electrical signal; IEPE sensor, used to collect vibration wave signals generated by partial discharge of electrical equipment and output corresponding second electrical signals; An MCU processor, wherein a first input end of the MCU processor is connected to an output end of the microphone, a second input end of the MCU processor is connected to an output end of the IEPE sensor, and the MCU processor is used to output a corresponding detection signal according to the first electrical signal and / or the second electrical signal.

2. The discharge detection assembly according to claim 1, characterized in that: It also includes a network port communication module, the first interactive end of the network port communication module is connected to the interactive end of the MCU processor, and the second interactive end of the network port communication module is used to connect to the terminal device; the network port communication module is used to connect the data communication between the MCU processor and the terminal device.

3. The discharge detection assembly according to claim 1, characterized in that: Also includes: A first amplifier circuit, wherein an input end of the first amplifier circuit is connected to an output end of the microphone, and an output end of the first amplifier circuit is connected to a first input end of the MCU processor; The first amplifier circuit is used to amplify the first electrical signal and then output it to the MCU processor; and / or, A second amplifier circuit, wherein the input end of the second amplifier circuit is connected to the output end of the IEPE sensor, and the output end of the second amplifier circuit is connected to the second input end of the MCU processor; the second amplifier circuit is used for amplifying the second electrical signal and outputting it to the MCU processor.

4. The discharge detection assembly according to claim 1, characterized in that: It also includes an analog-to-digital conversion circuit, a first input end of the analog-to-digital conversion circuit is connected to the output end of the microphone, and a second input end of the analog-to-digital conversion circuit is connected to the output end of the IEPE sensor; the analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the first electrical signal and / or the second electrical signal and then output the resultant signal.

5. The discharge detection assembly according to claim 1, characterized in that: It also includes a power supply circuit, wherein the first power supply terminal of the power supply circuit is connected to the power supply terminal of the microphone, the second power supply terminal of the power supply circuit is connected to the power supply terminal of the IEPE sensor, and the third power supply terminal of the power supply circuit is connected to the power supply terminal of the MCU processor; the power supply circuit is used to output power supply.

6. The discharge detection assembly according to claim 2, characterized in that: The network port communication module includes a network port, and the network port is used to connect to the power supply equipment; The discharge detection component also includes: A voltage conversion circuit, wherein a first power input terminal of the voltage conversion circuit is used to connect to an external power input terminal, a first power output terminal of the voltage conversion circuit is connected to a power terminal of the microphone, a second power output terminal of the voltage conversion circuit is connected to a power terminal of the IEPE sensor, and a third power output terminal of the voltage conversion circuit is connected to a power terminal of the power supply circuit; A POE power supply circuit, wherein a power input terminal of the POE power supply circuit is connected to the network port, a power output terminal of the POE power supply circuit is connected to a second power input terminal of the voltage conversion circuit, and the POE power supply circuit is used to transmit a POE power provided by a power supply device; The voltage conversion circuit is used to convert the voltage of the external power supply voltage input from the external power supply input terminal and / or the POE power supply output from the POE power supply circuit and then output it.

7. The discharge detection assembly according to claim 6, characterized in that: The POE power supply circuit comprises: A polarity conversion circuit, the polarity conversion circuit is connected to the network port, the polarity conversion circuit is used to receive the POE power provided by the power supply device, and output the POE power after performing polarity conversion; A clamping protection circuit, wherein the clamping protection circuit is respectively connected to the second power input terminal of the polarity conversion circuit and the voltage conversion circuit; the clamping protection circuit is used to open the path between the polarity conversion circuit and the voltage conversion circuit when the voltage of the POE power output by the polarity conversion circuit is less than or equal to a preset voltage, and to disconnect the path between the polarity conversion circuit and the voltage conversion circuit when the voltage of the POE power output by the polarity conversion circuit is greater than the preset voltage; A POE power matching circuit, wherein the POE power matching circuit is respectively connected to the polarity conversion circuit and the second power input terminal of the voltage conversion circuit; the POE power matching circuit is used to output an identification signal to a power supply device, and to receive a corresponding feedback signal from the power supply device, and when it is determined according to the feedback signal that the access standard of the power supply device matches a preset standard, control the access of the POE power to the second power input terminal of the voltage conversion circuit.

8. The discharge detection assembly according to claim 3, characterized in that: The discharge detection component includes a first amplifier circuit, and the first amplifier circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a third capacitor and a first amplifier; Among them, one end of the first capacitor is connected to the output end of the microphone; the other end of the first capacitor is connected to one end of the first resistor; the other end of the first resistor and the positive input end of the first amplifier are connected to the first power supply end of the first amplifier circuit; the inverting input end of the first amplifier, one end of the second resistor, and one end of the third resistor are connected to the second power supply end of the first amplifier circuit; the other end of the second resistor is connected to one end of the second capacitor, and the other end of the second capacitor is grounded; the output end of the first amplifier and the other end of the third resistor are connected to one end of the third capacitor; the other end of the third capacitor is connected to one end of the fourth resistor; the other end of the fourth resistor is connected to the output end of the first amplifier circuit.

9. The discharge detection assembly according to claim 3, characterized in that: The discharge detection component includes a second amplifier circuit, which includes a first variable resistor, a second variable resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a fourth capacitor, a fifth capacitor and a second amplifier; Among them, one end of the first variable resistor and one end of the second variable resistor are connected to the first output end of the IEPE sensor; the other end of the first variable resistor, one end of the fifth resistor and one end of the fourth capacitor are grounded; the other end of the fifth resistor and one end of the sixth resistor are connected to the second output end of the IEPE sensor; the other end of the second variable resistor and the other end of the sixth resistor are connected to one end of the seventh resistor; the other end of the seventh resistor and the positive phase input end of the second amplifier are connected to the first power supply end of the second amplifier circuit; the inverting input end of the second amplifier and one end of the eighth resistor are connected to one end of the ninth resistor; the other end of the eighth resistor is connected to the other end of the fourth capacitor; the output end of the second amplifier and the other end of the ninth resistor are connected to one end of the fifth capacitor; the other end of the fifth capacitor is connected to one end of the tenth resistor; the other end of the tenth resistor is connected to the output end of the second amplifier circuit.

10. A detection device, characterized in that: The invention comprises a discharge detection component as claimed in any one of claims 1 to 9.

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