Detection device and method for simulating lightning stroke test impact platform pulse current

Abstract

The invention discloses a lightning stroke simulation test impact platform pulse current detection device and method, and relates to the technical field of lightning stroke simulation tests. The current signal detection end of the photoelectric conversion module is electrically connected with the detected current wire of the lightning stroke simulation test impact platform, when pulse current passes through the detected current wire, the photoelectric conversion module can convert an optical signal into a voltage signal, then the voltage signal is converted into a voltage simulation signal through the signal processing module, and the voltage simulation signal is transmitted to the lightning stroke simulation test impact platform. The optical fiber current sensing detection of the pulse current is realized; through response to the pulse current and processing of the optical signal, non-contact detection of the pulse current is realized, and precision reduction caused by continuous working of the detection device under the condition of high-power pulse current is avoided. And the condition that the detection precision is reduced due to over-high temperature of the detection device caused by the use of a shunt in the prior art is compensated. And the detection accuracy of the pulse current of the simulation lightning stroke test impact platform is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of simulated lightning strike tests, and in particular relates to a detection device and method for pulse current of an impact platform of a simulated lightning strike test. Background Art

[0002] In order to prevent lightning from damaging power equipment, equipment used to protect high-voltage power transmission, such as surge protectors, lightning arresters and other lightning protection equipment, has been rapidly popularized. In order to simulate the actual situation of lightning protection equipment being struck by lightning during use, it is necessary to conduct a simulated lightning action load test on the lightning protection equipment. The action load test refers to the lightning simulation wave impact under the condition of applying a continuous working voltage to the lightning protection equipment. Among them, the 10 / 350μs simulated lightning test impact platform is an important equipment for action load test, and the accuracy of its pulse current is directly related to the test effect.

[0003] The current detection device of the pulse current of the 10 / 350μs simulated lightning test impact platform usually uses a current transformer, an AC / DC shunt, a Pearson coil, etc., but since the frequency range of the 10 / 350μs waveform is relatively wide, between tens of Hz and tens of kHz, the use of the Pearson coil for pulse current detection has good accuracy in the high-frequency range, but the response characteristics in the low-frequency range are poor, resulting in the exponentially decaying wave tail part when measuring the 10 / 350μs waveform. There will be obvious distortion, making the detection of the pulse current inaccurate; and when using an AC / DC shunt, since the AC / DC shunt needs to be connected to the current bus, it continues to work under the condition of the high-power pulse current of the 10 / 350μs simulated lightning test impact platform, and its self-heating will cause the surface temperature of the shunt to rise, which greatly affects the accuracy of the AC / DC shunt, thereby making the detection of the pulse current inaccurate. Therefore, there is an urgent need for a detection device and method for the pulse current of the simulated lightning test impact platform to solve the defects of the prior art. Summary of the invention

[0004] The present invention aims to provide a detection device and method for pulse current of a simulated lightning strike test impact platform to solve the above-mentioned technical problems. By responding to the pulse current through an optical signal, optical fiber current sensing detection of the pulse current is realized, thereby improving the detection accuracy of the pulse current of the simulated lightning strike test impact platform.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a detection device for pulse current of a simulated lightning test impact platform, which is applicable to a simulated lightning test impact platform including a current conductor to be measured. The detection device includes: a photoelectric conversion module, a light source and a signal processing module;

[0006] The current signal detection end of the photoelectric conversion module is connected to the measured current wire of the simulated lightning strike test impact platform;

[0007] The signal control end of the photoelectric conversion module is electrically connected to the second output end of the signal processing module;

[0008] The output end of the photoelectric conversion module is electrically connected to the input end of the signal processing module;

[0009] The optical signal input end of the photoelectric conversion module is used to receive the optical signal output by the light source;

[0010] The first output terminal of the signal processing module is used to output a voltage analog signal;

[0011] When the current signal detection end of the photoelectric conversion module detects a pulse current passing through the current conductor being measured, in response to the pulse current, the photoelectric conversion module converts the light signal output by the light source into a voltage signal, and then converts the voltage signal into a voltage analog signal through the signal processing module.

[0012] It can be understood that, compared with the prior art, the present invention electrically connects the current signal detection end of the photoelectric conversion module with the current conductor to be measured of the simulated lightning test impact platform, and inputs the optical signal output by the light source into the photoelectric conversion module. When a pulse current passes through the current conductor to be measured, the photoelectric conversion module can respond to the pulse current and convert the optical signal into a voltage signal, and then convert the voltage signal into a voltage simulation signal through the signal processing module, thereby realizing the optical fiber current sensing detection of the pulse current; by responding to the pulse current and processing the optical signal, the non-contact detection of the pulse current is realized, avoiding the reduction in accuracy caused by the continuous operation of the detection device under the condition of high-power pulse current, and compensating for the situation in the prior art where the detection device itself is overheated due to the use of a shunt, resulting in a reduction in detection accuracy. The detection accuracy of the pulse current of the simulated lightning test impact platform is improved.

[0013] As a preferred solution, the detection device further includes a power supply module;

[0014] The input end of the power module serves as a power supply interface;

[0015] The output end of the power supply module is electrically connected to the power supply input end of the photoelectric conversion module;

[0016] The output end of the power supply module is electrically connected to the power supply input end of the signal processing module;

[0017] The output end of the power module is electrically connected to the power input end of the light source.

[0018] As a preferred solution, the detection device further includes a temperature control module; the temperature control module includes: a temperature collector, a temperature processing unit and a temperature control unit;

[0019] The input end of the temperature collector is electrically connected to the temperature collection end of the light source, and is used to collect the temperature of the light source;

[0020] The output end of the temperature control unit is electrically connected to the temperature control end of the light source;

[0021] The input end of the temperature processing unit is electrically connected to the output end of the temperature collector;

[0022] The output end of the temperature processing unit is electrically connected to the input end of the temperature control unit;

[0023] When the temperature of the light source is not at a preset temperature, the temperature processing unit generates a temperature driving instruction according to a preset temperature control algorithm, so that the temperature control unit adjusts the temperature of the light source according to the temperature driving instruction.

[0024] This preferred solution collects the temperature of the light source through the temperature control module and adjusts the temperature of the light source to a preset temperature value, thereby ensuring that the wavelength of the optical signal output by the light source remains constant, thereby ensuring the stability of the optical signal conversion in the photoelectric conversion module, and improving the detection accuracy and stability of the pulse current of the simulated lightning strike test impact platform.

[0025] As a preferred solution, the photoelectric conversion module specifically includes: a circulator, a polarizer, a phase modulator, a polarization-maintaining delay fiber, a quarter glass plate, a sensing fiber, a reflector and a photodetector;

[0026] The first end of the circulator serves as the optical signal input end of the photoelectric conversion module, and is connected to the output end of the light source;

[0027] The second end of the circulator is connected to the input end of the polarizer;

[0028] The third end of the circulator is connected to the input end of the photodetector;

[0029] The first end of the polarizer is connected to the first end of the phase modulator;

[0030] The second end of the phase modulator is connected to the first end of the polarization-maintaining delay optical fiber;

[0031] The second end of the polarization-maintaining delay optical fiber is connected to the first end of the quarter glass slide;

[0032] The second end of the quarter glass slide is connected to the first end of the sensing optical fiber;

[0033] The second end of the sensing optical fiber is connected to the reflector;

[0034] The sensing optical fiber serves as the current signal detection end of the photoelectric conversion module, and is wound around the current conductor to be measured on the simulated lightning strike test impact platform;

[0035] The output end of the photodetector is electrically connected to the input end of the signal processing module;

[0036] The signal input end of the phase modulator serves as the signal control end of the photoelectric conversion module, which is electrically connected to the second output end of the signal processing module;

[0037] The power supply input terminal of the photodetector is electrically connected to the output terminal of the power module.

[0038] In this preferred solution, the sensing optical fiber in the photoelectric conversion module is wound around the measured current conductor of the simulated lightning test impact platform. In response to the pulse current, the optical signal is processed by a circulator, a polarizer, a phase modulator, a polarization-maintaining delay optical fiber, a quarter glass and a reflector. Finally, the optical signal is converted into a voltage signal by a photodetector, thereby realizing optical fiber current sensing detection of the pulse current, realizing non-contact detection of the pulse current, and improving the detection accuracy of the pulse current of the simulated lightning test impact platform.

[0039] As a preferred solution, a 45° optical fiber fusion angle is provided between the polarizer and the phase modulator; and a 45° optical fiber fusion angle is provided between the polarization-maintaining delay optical fiber and the quarter glass.

[0040] As a preferred solution, the detection device further includes a constant current source module;

[0041] The constant current source module includes: a linear voltage stabilizing chip and a third resistor;

[0042] The first pin of the linear voltage regulator chip is electrically connected to the power supply input terminal of the light source;

[0043] The first pin of the linear voltage stabilizing chip is electrically connected to the second end of the third resistor;

[0044] The second pin of the linear voltage stabilizing chip is electrically connected to the first end of the third resistor;

[0045] The third pin of the linear voltage regulator chip is electrically connected to the output end of the power module.

[0046] This preferred solution electrically connects the constant current source module to the power supply module, and then electrically connects the constant current source module to the light source; the constant current source module can provide a constant current to the light source, so that the output power of the light source remains stable, thereby ensuring the stability of the optical signal conversion in the photoelectric conversion module, and improving the detection accuracy and stability of the pulse current of the simulated lightning strike test impact platform.

[0047] As a preferred solution, the signal processing module includes: a pre-attenuator unit, an A / D conversion unit, a digital signal processing unit, a first D / A conversion unit, a first post-stage amplifier unit, a second D / A conversion unit, a second post-stage amplifier unit and an interface output unit;

[0048] The output end of the pre-attenuator unit is electrically connected to the input end of the A / D conversion unit;

[0049] The output end of the A / D conversion unit is electrically connected to the input end of the digital signal processing unit;

[0050] The first output terminal of the digital signal processing unit is electrically connected to the input terminal of the first D / A conversion unit;

[0051] The output end of the first D / A conversion unit is electrically connected to the input end of the first post-stage amplifier unit;

[0052] The output end of the first post-stage amplifier unit serves as the second output end of the signal processing module, which is electrically connected to the signal input end of the phase modulator;

[0053] The second output terminal of the digital signal processing unit is electrically connected to the input terminal of the second D / A conversion unit;

[0054] The output end of the second D / A conversion unit is electrically connected to the input end of the second post-stage amplifier unit;

[0055] The output end of the second post-stage amplifier unit is electrically connected to the input end of the interface output unit;

[0056] The input end of the pre-attenuator unit serves as the input end of the signal processing module, and is electrically connected to the output end of the photodetector; the output end of the interface output unit serves as the first output end of the signal processing module, and is used to output a voltage analog signal;

[0057] The power supply input end of the pre-attenuator unit is electrically connected to the output end of the power supply module; the power supply input end of the A / D conversion unit is electrically connected to the output end of the power supply module; the power supply input end of the digital signal processing unit is electrically connected to the output end of the power supply module; the power supply input end of the first D / A conversion unit is electrically connected to the output end of the power supply module; the power supply input end of the second D / A conversion unit is electrically connected to the output end of the power supply module; the power supply input end of the first post-stage amplifier unit is electrically connected to the output end of the power supply module; and the power supply input end of the second post-stage amplifier unit is electrically connected to the output end of the power supply module.

[0058] This preferred solution demodulates and calculates the voltage signal through the signal processing module, thereby converting the voltage signal into a voltage analog signal, so that the pulse current amplitude, pulse current rise time and pulse current duration parameters can be obtained based on the voltage analog signal, thereby realizing non-contact detection of the pulse current signal and improving the detection accuracy of the pulse current of the simulated lightning strike test impact platform.

[0059] As a preferred solution, the signal processing module further includes: a dip switch unit;

[0060] The output end of the DIP switch unit is electrically connected to the control end of the digital signal processing unit;

[0061] The input end of the DIP switch unit serves as the control input end of the detection device;

[0062] The dip switch unit is used to control the attenuation ratio of the digital signal processing unit.

[0063] This preferred solution controls the attenuation ratio of the digital signal processing unit through a dip switch, can adapt to different voltage input ranges, meets the needs of different scenarios, and enhances the applicability of the detection device.

[0064] As a preferred solution, the power module includes: a first power chip, a second power chip, a first resistor, a second resistor, a first filter capacitor and a second filter capacitor;

[0065] The sixth pin of the first power chip is grounded; the thirteenth pin of the first power chip is grounded; the eighth pin of the first power chip is electrically connected to the first end of the first resistor; the ninth pin of the first power chip is electrically connected to the second end of the first filter capacitor; the tenth pin of the first power chip is electrically connected to the first end of the first filter capacitor; the eleventh pin of the first power chip is electrically connected to the first end of the first filter capacitor; the twelfth pin of the first power chip is electrically connected to the first end of the first filter capacitor;

[0066] The second end of the first resistor is electrically connected to the second end of the first filter capacitor;

[0067] The second end of the first filter capacitor is grounded;

[0068] The sixth pin of the second power chip is grounded; the eighth pin of the second power chip is electrically connected to the first end of the second resistor; the ninth pin of the second power chip is electrically connected to the second end of the second filter capacitor; the tenth pin of the second power chip is electrically connected to the first end of the second filter capacitor; the eleventh pin of the second power chip is electrically connected to the first end of the second filter capacitor; the twelfth pin of the second power chip is electrically connected to the first end of the second filter capacitor;

[0069] The second end of the second resistor is electrically connected to the second end of the second filter capacitor;

[0070] The second terminal of the second filter capacitor is grounded;

[0071] The first pin, the second pin, the third pin, the fourth pin and the seventh pin of the first power chip are all used as the input end of the power module; the first pin, the second pin, the third pin, the fifth pin and the thirteenth pin of the second power chip are all used as the input end of the power module;

[0072] The first end of the first filter capacitor and the first end of the second filter capacitor both serve as output ends of the power module.

[0073] Accordingly, an embodiment of the present invention provides a method for detecting pulse current of a simulated lightning strike test impact platform, which is applicable to the detection device for detecting pulse current of a simulated lightning strike test impact platform as described above, comprising:

[0074] Controlling the light source to input an optical signal to the photoelectric conversion module;

[0075] When the current signal detection end of the photoelectric conversion module detects that a pulse current passes through the measured current wire, the photoelectric conversion module is controlled to convert the optical signal into a voltage signal, and then the signal processing module is controlled to convert the voltage signal into a voltage analog signal;

[0076] The detection result of the pulse current of the simulated lightning test impact platform is obtained according to the voltage simulation signal.

[0077] It can be understood that, compared with the prior art, the present invention realizes the optical fiber current sensing detection of pulse current by converting the optical signal into a voltage signal in response to the pulse current when a pulse current passes through the current conductor being measured, and then converting the voltage signal into a voltage analog signal through the signal processing module; by responding to the pulse current and processing the optical signal, the non-contact detection of the pulse current is realized, avoiding the reduction in accuracy caused by the continuous operation of the detection device under the condition of high-power pulse current, and compensating for the situation in the prior art where the temperature of the detection device itself is too high due to the use of a shunt, resulting in a reduction in detection accuracy. The detection accuracy of the pulse current of the simulated lightning test impact platform is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 : A schematic diagram of the structure of a detection device for pulse current of a simulated lightning strike test impact platform provided by an embodiment of the present invention;

[0079] Figure 2 : A schematic diagram of the connection between a temperature control module and a light source provided by an embodiment of the present invention;

[0080] Figure 3 : A schematic diagram of the structure of a photoelectric conversion module provided by an embodiment of the present invention;

[0081] Figure 4 : A circuit diagram of a constant current source module provided by an embodiment of the present invention;

[0082] Figure 5 : A circuit diagram of a signal processing module provided by an embodiment of the present invention;

[0083] Figure 6 : A schematic diagram of a specific structure of a power module provided by an embodiment of the present invention;

[0084] Figure 7 : A schematic structural diagram of another device for detecting pulse current of a simulated lightning strike test platform provided by an embodiment of the present invention;

[0085] Figure 8 : A schematic diagram of the steps of a method for detecting pulse current of a simulated lightning strike test platform provided by an embodiment of the present invention;

[0086] Among them, 101: light source; 102: photoelectric conversion module; 103: signal processing module; 104: power supply module; 105: constant current source module; 106: temperature control module; 1061: temperature collector; 1062: temperature processing unit; 1063: temperature control unit; 1021: circulator; 1022: polarizer; 1023: phase modulator; 1024: polarization-maintaining delay fiber; 1025: quarter glass; 1026: sensing fiber; 1027: reflector; 1028: photodetector; U3: linear voltage regulator chip; R3: third resistor; 1031: pre-attenuator unit; 1031: pre-attenuator unit; 1031: pre-attenuator unit; 1031: pre-attenuator unit; 1031: pre-attenuator unit; 1031: pre-attenuator unit; 1031: pre-attenuator unit; 1032: A / D conversion unit; 1033: digital signal processing unit; 1034: first D / A conversion unit; 1035: first post-stage amplifier unit; 1036: second D / A conversion unit; 1037: second post-stage amplifier unit; 1038: interface output unit; 1039: DIP switch unit; U1: first power supply chip; U2: second power supply chip; R1: first resistor; R2: second resistor; C1: first filter capacitor; C2: second filter capacitor; 301: optical path part; 302: circuit part. DETAILED DESCRIPTION

[0087] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] With the rapid popularization of high-voltage power transmission networks, lightning activities pose a serious threat to high-voltage power facilities under weather conditions with frequent thunderstorms. In order to protect high-voltage power facilities, surge protectors, lightning arresters and other lightning arresters have been widely installed and applied, thereby effectively protecting high-voltage power facilities from lightning damage. In order to simulate the actual response of various lightning protection products to lightning strikes during use, it is necessary to conduct simulated lightning action load tests on various lightning protection products. The action load test is to conduct lightning simulation wave shock under the condition of applying continuous working voltage. With the development of electronic and communication technology, the requirements for overvoltage protection lightning current testing are getting higher and higher, especially the measurement of the 10 / 350μs waveform of the direct lightning current of overvoltage protection. The relevant parameters of the 10 / 350μs pulse current generated by the simulated lightning test impact platform are directly related to the test effect. Therefore, it is necessary to detect the pulse current of the simulated lightning test impact platform.

[0089] At present, the detection devices for pulse current of the simulated lightning test impact platform include current transformers, AC / DC shunts, Pearson coils and Rogowski coils, etc., but the results given by different measurement methods have increasing differences. Since the frequency range of the 10 / 350μs waveform is very wide, about tens of Hz to tens of kHz, and the Pearson coil has a good response at the high frequency end, but the response characteristics at the low frequency end are not ideal, when measuring the 10 / 350μs waveform, the exponentially decaying wave tail part also shows obvious distortion. When using a shunt for calibration, the shunt is connected to the current bus, which affects the current loop characteristics of the calibrated equipment, and its own thermal effect will also affect the measurement accuracy.

[0090] Embodiment 1

[0091] Please refer to Figure 1 , which is a structural schematic diagram of a pulse current detection device for a simulated lightning test impact platform provided by an embodiment of the present invention, and is applicable to a simulated lightning test impact platform including a current conductor to be measured, and the detection device includes: a photoelectric conversion module 102, a light source 101 and a signal processing module 103;

[0092] The current signal detection end of the photoelectric conversion module 102 is connected to the measured current wire of the simulated lightning strike test impact platform;

[0093] The signal control terminal of the photoelectric conversion module 102 is electrically connected to the second output terminal of the signal processing module 103;

[0094] The output end of the photoelectric conversion module 102 is electrically connected to the input end of the signal processing module 103;

[0095] The optical signal input end of the photoelectric conversion module 102 is used to receive the optical signal output by the light source 101;

[0096] The first output terminal of the signal processing module 103 is used to output a voltage analog signal;

[0097] When the current signal detection end of the photoelectric conversion module 102 detects a pulse current passing through the current conductor under test, in response to the pulse current, the photoelectric conversion module 102 converts the light signal output by the light source 101 into a voltage signal, and then converts the voltage signal into a voltage analog signal through the signal processing module 103.

[0098] In this embodiment, if Figure 1 As shown, the detection device further includes a power supply module 104;

[0099] The input end of the power module 104 serves as a power supply interface;

[0100] The output end of the power supply module 104 is electrically connected to the power supply input end of the photoelectric conversion module 102;

[0101] The output end of the power supply module 104 is electrically connected to the power supply input end of the signal processing module 103;

[0102] The output end of the power module 104 is electrically connected to the power input end of the light source 101 .

[0103] Please refer to Figure 2 , is a schematic diagram of the connection between a temperature control module and a light source provided in an embodiment of the present invention.

[0104] In this embodiment, if Figure 1 and Figure 2 As shown, the detection device further includes a temperature control module 106; the temperature control module 106 includes: a temperature collector 1061, a temperature processing unit 1062 and a temperature control unit 1063;

[0105] The input end of the temperature collector 1061 is electrically connected to the temperature collection end of the light source 101, and is used to collect the temperature of the light source 101;

[0106] The output end of the temperature control unit 1063 is electrically connected to the temperature control end of the light source 101;

[0107] The input end of the temperature processing unit 1062 is electrically connected to the output end of the temperature collector 1061;

[0108] The output end of the temperature processing unit 1062 is electrically connected to the input end of the temperature control unit 1063;

[0109] When the temperature of the light source 101 is not at a preset temperature, the temperature processing unit 1062 generates a temperature driving instruction according to a preset temperature control algorithm, so that the temperature control unit 1063 regulates the temperature of the light source 101 according to the temperature driving instruction.

[0110] This embodiment collects the temperature of the light source through the temperature control module and adjusts the temperature of the light source to a preset temperature value, thereby ensuring that the wavelength of the optical signal output by the light source remains constant, thereby ensuring the stability of the optical signal conversion in the photoelectric conversion module, and improving the detection accuracy and stability of the pulse current of the simulated lightning strike test impact platform.

[0111] In an optional embodiment, the temperature control module can adopt a TCM1040 temperature controller, and collect the temperature of the light source 101 through the temperature collector 1061 of the TCM1040 temperature controller, and then generate a temperature driving instruction according to a preset temperature control algorithm through the temperature processing unit 1062 of the TCM1040 temperature controller, so that the temperature control unit 1063 of the TCM1040 temperature controller adjusts the temperature of the light source 101 to maintain at 25°C; wherein, the preset temperature control algorithm is a built-in algorithm inside the TCM1040 temperature controller, so this embodiment will not be described in detail here.

[0112] Please refer to Figure 3 , is a structural schematic diagram of a photoelectric conversion module provided in an embodiment of the present invention.

[0113] In this embodiment, if Figure 3 As shown, the photoelectric conversion module 102 specifically includes: a circulator 1021, a polarizer 1022, a phase modulator 1023, a polarization-maintaining delay fiber 1024, a quarter glass 1025, a sensing fiber 1026, a reflector 1027 and a photodetector 1028;

[0114] The first end of the circulator 1021 serves as the optical signal input end of the photoelectric conversion module 102 , and is connected to the output end of the light source 101 ;

[0115] The second end of the circulator 1021 is connected to the input end of the polarizer 1022;

[0116] The third end of the circulator 1021 is connected to the input end of the photodetector 1028;

[0117] The first end of the polarizer 1022 is connected to the first end of the phase modulator 1023;

[0118] The second end of the phase modulator 1023 is connected to the first end of the polarization-maintaining delay optical fiber 1024;

[0119] The second end of the polarization-maintaining delay optical fiber 1024 is connected to the first end of the quarter glass slab 1025;

[0120] The second end of the quarter glass slide 1025 is connected to the first end of the sensing optical fiber 1026;

[0121] The second end of the sensing optical fiber 1026 is connected to the reflector 1027;

[0122] The sensing optical fiber 1026 serves as the current signal detection end of the photoelectric conversion module 102, and is wound around the current conductor to be measured on the simulated lightning strike test impact platform;

[0123] The output end of the photodetector 1028 is electrically connected to the input end of the signal processing module 103;

[0124] The signal input end of the phase modulator 1023 serves as the signal control end of the photoelectric conversion module 102, and is electrically connected to the second output end of the signal processing module 103;

[0125] The power supply input terminal of the photodetector 1028 is electrically connected to the output terminal of the power module 104 .

[0126] In this embodiment, the sensing optical fiber in the photoelectric conversion module is wound around the measured current conductor of the simulated lightning test impact platform. In response to the pulse current, the optical signal is processed by a circulator, a polarizer, a phase modulator, a polarization-maintaining delay optical fiber, a quarter glass and a reflector. Finally, the optical signal is converted into a voltage signal by a photodetector, thereby realizing optical fiber current sensing detection of the pulse current, realizing non-contact detection of the pulse current, and improving the detection accuracy of the pulse current of the simulated lightning test impact platform.

[0127] In this embodiment, a 45° optical fiber fusion angle is provided between the polarizer and the phase modulator; and a 45° optical fiber fusion angle is provided between the polarization-maintaining delay optical fiber and the quarter glass.

[0128] In an optional embodiment, the working principle of the photoelectric conversion module described in this embodiment is specifically as follows: the light source generates a laser (i.e., an optical signal) with a wavelength of 1310 nm and enters the first end of the circulator 1021, and enters the polarizer 1022 from the second end of the circulator 1021. The polarizer 1022 converts the laser with a wavelength of 1310 nm into a linearly polarized laser. Then, the laser passes through the 45° fusion angle of the optical fiber and independently propagates along the fast axis and the slow axis in the polarization-maintaining optical fiber between the polarizer 1022 and the phase modulator 1023, and maintains the original deflection characteristics; then, after passing through the phase modulator 1023, it enters the polarization-maintaining delay optical fiber 1024 to extend its optical path transit time, and then, through the quarter glass 1025, the two linearly polarized lights propagating along the fast axis and the slow axis are converted into circularly polarized lights (left-handed and right-handed) with opposite rotation directions, and then the circularly polarized lights enter the sensing optical fiber 1026;

[0129] When a pulse current passes through the measured current conductor, the circularly polarized light in the sensing optical fiber 1026 generates a phase difference, and after being reflected by the reflector 1027, it returns along the original path (at this time, the polarization modes of the two circularly polarized lights independently transmitted along the fast axis and the slow axis are interchanged, and due to the influence of the pulse current, the phase difference of the two circularly polarized lights is further increased), and after interference occurs in the polarizer 1022, it enters from the second end of the circulator 1021, is emitted from the third end of the circulator 1021 and enters the photodetector 1028, and the light intensity of the two circularly polarized lights is converted into a voltage signal by the photodetector 1028.

[0130] Please refer to Figure 4 , is a circuit diagram of a constant current source module provided in an embodiment of the present invention.

[0131] In this embodiment, if Figure 4 As shown, the detection device further includes a constant current source module 105; the constant current source module 105 includes: a linear voltage regulator chip U3 and a third resistor R3;

[0132] The first pin of the linear voltage regulator chip U3 is electrically connected to the power supply input terminal of the light source 101;

[0133] The first pin of the linear voltage regulator chip U3 is electrically connected to the second end of the third resistor R3;

[0134] The second pin of the linear voltage regulator chip U3 is electrically connected to the first end of the third resistor R3;

[0135] The third pin of the linear voltage regulator chip U3 is electrically connected to the output end of the power module 104 .

[0136] In this embodiment, a constant current source module is electrically connected to a power supply module, and then the constant current source module is electrically connected to a light source; the constant current source module can provide a constant current to the light source, so that the output power of the light source remains stable, thereby ensuring the stability of the optical signal conversion in the photoelectric conversion module, and improving the detection accuracy and stability of the pulse current of the simulated lightning strike test impact platform.

[0137] In an optional embodiment, the model of the linear voltage regulator chip U3 is LM1117, the third resistor R3 is a high-precision low-temperature drift resistor, and a 100mA current is output to the power supply input end of the light source 101 through the first pin of the linear voltage regulator chip U3. The resistance value of the third resistor R3 is 12.5Ω.

[0138] Please refer to Figure 5 , is a circuit diagram of a signal processing module provided in an embodiment of the present invention.

[0139] As a preferred solution, the signal processing module 103 includes: a pre-attenuator unit 1031, an A / D conversion unit 1032, a digital signal processing unit 1033, a first D / A conversion unit 1034, a first post-stage amplifier unit 1035, a second D / A conversion unit 1036, a second post-stage amplifier unit 1037 and an interface output unit 1038;

[0140] The output end of the pre-attenuator unit 1031 is electrically connected to the input end of the A / D conversion unit 1032;

[0141] The output end of the A / D conversion unit 1032 is electrically connected to the input end of the digital signal processing unit 1033;

[0142] The first output terminal of the digital signal processing unit 1033 is electrically connected to the input terminal of the first D / A conversion unit 1034;

[0143] The output end of the first D / A conversion unit 1034 is electrically connected to the input end of the first post-stage amplifier unit 1035;

[0144] The output end of the first post-stage amplifier unit 1035 serves as the second output end of the signal processing module 103, which is electrically connected to the signal input end of the phase modulator 1023;

[0145] The second output terminal of the digital signal processing unit 1033 is electrically connected to the input terminal of the second D / A conversion unit 1036;

[0146] The output terminal of the second D / A conversion unit 1036 is electrically connected to the input terminal of the second post-stage amplifier unit 1037;

[0147] The output end of the second post-stage amplifier unit 1037 is electrically connected to the input end of the interface output unit 1038;

[0148] The input end of the pre-attenuator unit 1031 serves as the input end of the signal processing module 103, and is electrically connected to the output end of the photodetector 1028; the output end of the interface output unit 1038 serves as the first output end of the signal processing module 103, and is used to output a voltage analog signal;

[0149] The power supply input end of the pre-attenuator unit 1031 is electrically connected to the output end of the power supply module 104; the power supply input end of the A / D conversion unit 1032 is electrically connected to the output end of the power supply module 104; the power supply input end of the digital signal processing unit 1033 is electrically connected to the output end of the power supply module 104; the power supply input end of the first D / A conversion unit 1034 is electrically connected to the output end of the power supply module 104; the power supply input end of the second D / A conversion unit 1036 is electrically connected to the output end of the power supply module 104; the power supply input end of the first post-stage amplifier unit 1035 is electrically connected to the output end of the power supply module 104; the power supply input end of the second post-stage amplifier unit 1037 is electrically connected to the output end of the power supply module 104.

[0150] This embodiment demodulates and calculates the voltage signal through the signal processing module, thereby converting the voltage signal into a voltage analog signal, so that the pulse current amplitude, pulse current rise time and pulse current duration parameters can be obtained based on the voltage analog signal, thereby realizing non-contact detection of the pulse current signal and improving the detection accuracy of the pulse current of the simulated lightning test impact platform.

[0151] In this embodiment, if Figure 5 As shown, the signal processing module 103 further includes: a dip switch unit 1039;

[0152] The output end of the DIP switch unit 1039 is electrically connected to the control end of the digital signal processing unit 1033;

[0153] The input end of the DIP switch unit 1039 serves as the control input end of the detection device;

[0154] The DIP switch unit 1039 is used to control the attenuation ratio of the digital signal processing unit 1033 .

[0155] This embodiment controls the attenuation ratio of the digital signal processing unit through the DIP switch, which can adapt to different voltage input ranges, meet the needs of different scenarios, and enhance the application scope of the detection device.

[0156] In an optional embodiment, the working principle of the signal processing module is specifically as follows: the input voltage signal is attenuated by the pre-attenuator unit 1031, and then the attenuated voltage signal is transmitted to the A / D conversion unit 1032 to convert the voltage signal into a digital signal; then the digital signal is demodulated and calculated by the digital signal processing unit 1033 to obtain a modulated signal digital quantity; the attenuation ratio of the digital signal processing unit 1033 is controlled by the dip switch unit 1039, and then the calculated actual current value is converted into a current digital quantity after being attenuated according to the attenuation ratio; then the modulated signal digital quantity is input into the first D / A conversion unit 1034, and then the first D / A The conversion unit 1034 converts the digital quantity of the modulation signal into an analog voltage signal, and transmits the analog voltage signal to the first post-stage amplifier unit 1035, which amplifies the analog voltage signal and outputs it to the phase modulator 1023, thereby realizing signal modulation of the photoelectric conversion module; the digital quantity of the current is input into the second D / A conversion unit 1036, which converts the digital quantity of the current into a voltage analog signal, and the voltage analog signal is amplified by the second post-stage amplifier unit 1037 and output to the interface output unit 1038, and the voltage analog signal is output by the interface output unit 1038.

[0157] It should be noted that the pre-attenuator unit 1031 of this embodiment adopts the AD8139 differential amplifier, and the amplification factor is set to 0.5 times; the A / D conversion unit 1032 of this embodiment adopts the A / D converter of model AD9248; the digital signal processing unit 1033 adopts the FPGA chip of the EP4CE10F17CN series, and performs demodulation and calculation through its own optical fiber current sensing digital closed-loop control algorithm; the attenuation ratios set by the dip switch unit 1039 include: 1:10000, 1:20000, 1:30000 and 1:40000; the first D / A conversion unit 1034 and the second D / A conversion unit 1036 both adopt the D / A converter of model LTC1668, and the first post-stage amplifier unit 1035 and the second post-stage amplifier unit 1037 both adopt the AD8139 differential amplifier; the interface output unit 1038 is a BNC interface.

[0158] Please refer to Figure 6 , is a specific structural diagram of a power module provided in an embodiment of the present invention.

[0159] In this embodiment, if Figure 6 As shown, the power module includes: a first power chip U1, a second power chip U2, a first resistor R1, a second resistor R2, a first filter capacitor C1 and a second filter capacitor C2;

[0160] The sixth pin of the first power chip U1 is grounded; the thirteenth pin of the first power chip U1 is grounded; the eighth pin of the first power chip U1 is electrically connected to the first end of the first resistor R1; the ninth pin of the first power chip U1 is electrically connected to the second end of the first filter capacitor C1; the tenth pin of the first power chip U1 is electrically connected to the first end of the first filter capacitor C1; the eleventh pin of the first power chip U1 is electrically connected to the first end of the first filter capacitor C1; the twelfth pin of the first power chip U1 is electrically connected to the first end of the first filter capacitor C1;

[0161] The second end of the first resistor R1 is electrically connected to the second end of the first filter capacitor C1;

[0162] The second end of the first filter capacitor C1 is grounded;

[0163] The sixth pin of the second power chip U2 is grounded; the eighth pin of the second power chip U2 is electrically connected to the first end of the second resistor R2; the ninth pin of the second power chip U2 is electrically connected to the second end of the second filter capacitor C2; the tenth pin of the second power chip U2 is electrically connected to the first end of the second filter capacitor C2; the eleventh pin of the second power chip U2 is electrically connected to the first end of the second filter capacitor C2; the twelfth pin of the second power chip U2 is electrically connected to the first end of the second filter capacitor C2;

[0164] The second end of the second resistor R2 is electrically connected to the second end of the second filter capacitor C2;

[0165] The second end of the second filter capacitor C2 is grounded;

[0166] The first pin, the second pin, the third pin, the fourth pin and the seventh pin of the first power chip U1 are all used as the input end of the power module 104; the first pin, the second pin, the third pin, the fifth pin and the thirteenth pin of the second power chip U2 are all used as the input end of the power module 104;

[0167] The first end of the first filter capacitor C1 and the first end of the second filter capacitor C2 both serve as output ends of the power module 104 .

[0168] In an optional embodiment, the model of the first power chip U1 is LT3045, the model of the second power chip U2 is LT3094, the resistance of the first resistor R1 is 49.9kΩ, and the resistance of the second resistor R2 is 49.9kΩ; the capacitance of the first filter capacitor C1 and the second filter capacitor C2 are both 4.7μf; the first pin, the second pin, the third pin, the fourth pin and the seventh pin of the first power chip U1 are all connected to an externally provided +12V voltage, and the first pin, the second pin, the third pin, the fifth pin and the thirteenth pin of the second power chip U2 are all connected to an externally provided -12V voltage; the first end of the first filter capacitor C1 outputs a +5V voltage, and the first end of the second filter capacitor C2 outputs a -5V voltage. Among them, the power supply module 104 provides a +5V voltage for the constant current source module, provides +5V and -5V voltages for the photodetector 1028 in the photoelectric conversion module 102, provides a +5V voltage for the A / D conversion unit 1032, provides a +5V voltage for the digital signal processing unit, provides +5V and -5V voltages for the pre-attenuator unit 1031, provides a +5V voltage for the first D / A conversion unit 1034 and the second D / A conversion unit 1036, and provides +5V and -5V voltages for the first post-stage amplifier unit 1035 and the second post-stage amplifier unit 1037.

[0169] Please refer to Figure 7 , which is a schematic structural diagram of another device for detecting pulse current of a simulated lightning strike test platform provided by an embodiment of the present invention; Figure 7As shown, the detection device is divided into an optical path part 301 and a circuit part 302, wherein the optical path part 301 adopts an optical engine of model FL241, which includes: an SLD light source, a circulator, a polarizer, an optical phase modulator, a polarization-maintaining delay fiber, a 1 / 4 wave plate, a PIN-FET photodetector and a sensor fiber. After connecting and packaging these devices, a 3m sensing fiber and multiple electrical interfaces are led out. The electrical interfaces include a power interface (+5V, -5V, GND), an SLD light source power interface (PWR, GND), a temperature acquisition interface (RT+, RT-), an SLD light source temperature control interface (TEC+, TEC-), and a PIN-FET photodetector output port (PIN, GND). The circuit part 302 includes a temperature control module, a constant A current source module, a power module, a pre-attenuation module, an A / D module, an FPGA digital signal processing unit, a D / A module, a D / A module (two), a post-amplifier module, a post-amplifier module (two) and a BNC interface output module; the output interface of the power module is connected to the power interface (+5V, -5V, GND), and is simultaneously connected to the pre-attenuation module (providing +5V and -5V voltages), the A / D module (providing +5V voltage), the FPGA digital signal processing unit (providing +5V voltage), the D / A module (providing +5V voltage), the D / A module (providing +5V voltage), the post-amplifier module (providing +5V and -5V voltages), the post-amplifier module (two) (providing +5V and -5V voltages) and the constant current source module (providing +5V voltage).

[0170] This embodiment electrically connects the current signal detection end of the photoelectric conversion module to the current conductor to be measured of the simulated lightning test impact platform, and inputs the optical signal output by the light source into the photoelectric conversion module. When a pulse current passes through the current conductor to be measured, the photoelectric conversion module can respond to the pulse current and convert the optical signal into a voltage signal, and then convert the voltage signal into a voltage analog signal through the signal processing module, thereby realizing the optical fiber current sensing detection of the pulse current; by responding to the pulse current and processing the optical signal, the non-contact detection of the pulse current is realized, avoiding the reduction in accuracy caused by the continuous operation of the detection device under the condition of high-power pulse current, and compensating for the situation in the prior art where the detection device itself is overheated due to the use of a shunt, resulting in a reduction in detection accuracy. The detection accuracy of the pulse current of the simulated lightning test impact platform is improved.

[0171] Embodiment 2

[0172] Please refer to Figure 8 , is a schematic diagram of the steps of a method for detecting pulse current of a simulated lightning strike test impact platform provided by an embodiment of the present invention, including steps 201 to S203.

[0173] Step S201: controlling the light source to input an optical signal to the photoelectric conversion module.

[0174] Step S202: When the current signal detection end of the photoelectric conversion module detects that a pulse current passes through the measured current conductor, the photoelectric conversion module is controlled to convert the optical signal into a voltage signal, and then the signal processing module is controlled to convert the voltage signal into a voltage analog signal.

[0175] Step S203: obtaining a detection result of a pulse current of a simulated lightning strike test impact platform according to the voltage simulation signal.

[0176] It should be noted that, for the specific implementation details of steps S201 to S203 of the detection method, please refer to the description of the first embodiment, and no further details will be given here.

[0177] In this embodiment, when a pulse current passes through the current conductor being tested, the photoelectric conversion module can respond to the pulse current and convert the optical signal into a voltage signal, and then the voltage signal is converted into a voltage analog signal through the signal processing module, thereby realizing the optical fiber current sensing detection of the pulse current; by responding to the pulse current and processing the optical signal, the non-contact detection of the pulse current is realized, avoiding the reduction in accuracy caused by the continuous operation of the detection device under the condition of high-power pulse current, and compensating for the situation in the prior art where the detection device itself is overheated due to the use of a shunt, resulting in a reduction in detection accuracy. The detection accuracy of the pulse current of the simulated lightning test impact platform is improved.

[0178] In summary, the embodiment of the present invention electrically connects the current signal detection end of the photoelectric conversion module to the measured current conductor of the simulated lightning test impact platform, and inputs the optical signal output by the light source into the photoelectric conversion module. When a pulse current passes through the measured current conductor, the photoelectric conversion module can respond to the pulse current and convert the optical signal into a voltage signal, and then convert the voltage signal into a voltage simulation signal through the signal processing module, thereby realizing the optical fiber current sensing detection of the pulse current; by responding to the pulse current and processing the optical signal, non-contact detection of the pulse current is realized, avoiding the reduction in accuracy caused by the continuous operation of the detection device under the condition of high-power pulse current, and compensating for the situation in the prior art where the detection device itself is overheated due to the use of a shunt, resulting in a reduction in detection accuracy. The detection accuracy of the pulse current of the simulated lightning test impact platform is improved.

[0179] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A detection device for pulse current of a simulated lightning test impact platform, suitable for a simulated lightning test impact platform including a current conductor to be measured, characterized in that: The detection device comprises: a photoelectric conversion module, a light source and a signal processing module; The current signal detection end of the photoelectric conversion module is connected to the measured current wire of the simulated lightning strike test impact platform; The signal control end of the photoelectric conversion module is electrically connected to the second output end of the signal processing module; The output end of the photoelectric conversion module is electrically connected to the input end of the signal processing module; The optical signal input end of the photoelectric conversion module is used to receive the optical signal output by the light source; The first output terminal of the signal processing module is used to output a voltage analog signal; When the current signal detection end of the photoelectric conversion module detects a pulse current passing through the measured current conductor, in response to the pulse current, the photoelectric conversion module converts the light signal output by the light source into a voltage signal, and then converts the voltage signal into a voltage analog signal through the signal processing module.

2. A detection device for pulse current of a simulated lightning strike test platform as claimed in claim 1, characterized in that: Also includes a power module; The input end of the power module serves as a power supply interface; The output end of the power supply module is electrically connected to the power supply input end of the photoelectric conversion module; The output end of the power supply module is electrically connected to the power supply input end of the signal processing module; The output end of the power module is electrically connected to the power input end of the light source.

3. A detection device for pulse current of a simulated lightning strike test platform as claimed in claim 1, characterized in that: Also included is a temperature control module; The temperature control module includes: a temperature collector, a temperature processing unit and a temperature control unit; The input end of the temperature collector is electrically connected to the temperature collection end of the light source, and is used to collect the temperature of the light source; The output end of the temperature control unit is electrically connected to the temperature control end of the light source; The input end of the temperature processing unit is electrically connected to the output end of the temperature collector; The output end of the temperature processing unit is electrically connected to the input end of the temperature control unit; When the temperature of the light source is not at a preset temperature, the temperature processing unit generates a temperature driving instruction according to a preset temperature control algorithm, so that the temperature control unit adjusts the temperature of the light source according to the temperature driving instruction.

4. A detection device for pulse current of a simulated lightning strike test platform as claimed in claim 2, characterized in that: The photoelectric conversion module specifically includes: a circulator, a polarizer, a phase modulator, a polarization-maintaining delay fiber, a quarter glass, a sensing fiber, a reflector and a photodetector; The first end of the circulator serves as the optical signal input end of the photoelectric conversion module, and is connected to the output end of the light source; The second end of the circulator is connected to the input end of the polarizer; The third end of the circulator is connected to the input end of the photodetector; The first end of the polarizer is connected to the first end of the phase modulator; The second end of the phase modulator is connected to the first end of the polarization-maintaining delay optical fiber; The second end of the polarization-maintaining delay optical fiber is connected to the first end of the quarter glass slide; The second end of the quarter glass slide is connected to the first end of the sensing optical fiber; The second end of the sensing optical fiber is connected to the reflector; The sensing optical fiber serves as the current signal detection end of the photoelectric conversion module, and is wound around the current conductor to be measured on the simulated lightning strike test impact platform; The output end of the photodetector is electrically connected to the input end of the signal processing module; The signal input end of the phase modulator serves as the signal control end of the photoelectric conversion module, which is electrically connected to the second output end of the signal processing module; The power supply input terminal of the photodetector is electrically connected to the output terminal of the power module.

5. A detection device for pulse current of a simulated lightning strike test platform as claimed in claim 4, characterized in that: An optical fiber fusion angle of 45° is arranged between the polarizer and the phase modulator; and an optical fiber fusion angle of 45° is arranged between the polarization-maintaining delay optical fiber and the quarter glass plate.

6. A detection device for pulse current of a simulated lightning strike test platform as claimed in claim 2, characterized in that: It also includes a constant current source module; The constant current source module includes: a linear voltage stabilizing chip and a third resistor; The first pin of the linear voltage regulator chip is electrically connected to the power supply input terminal of the light source; The first pin of the linear voltage stabilizing chip is electrically connected to the second end of the third resistor; The second pin of the linear voltage stabilizing chip is electrically connected to the first end of the third resistor; The third pin of the linear voltage regulator chip is electrically connected to the output end of the power module.

7. A detection device for pulse current of a simulated lightning test platform as claimed in claim 4, characterized in that: The signal processing module includes: a pre-attenuator unit, an A / D conversion unit, a digital signal processing unit, a first D / A conversion unit, a first post-stage amplifier unit, a second D / A conversion unit, a second post-stage amplifier unit and an interface output unit; The output end of the pre-attenuator unit is electrically connected to the input end of the A / D conversion unit; The output end of the A / D conversion unit is electrically connected to the input end of the digital signal processing unit; The first output terminal of the digital signal processing unit is electrically connected to the input terminal of the first D / A conversion unit; The output end of the first D / A conversion unit is electrically connected to the input end of the first post-stage amplifier unit; The output end of the first post-stage amplifier unit serves as the second output end of the signal processing module, which is electrically connected to the signal input end of the phase modulator; The second output terminal of the digital signal processing unit is electrically connected to the input terminal of the second D / A conversion unit; The output end of the second D / A conversion unit is electrically connected to the input end of the second post-stage amplifier unit; The output end of the second post-stage amplifier unit is electrically connected to the input end of the interface output unit; The input end of the pre-attenuator unit serves as the input end of the signal processing module, and is electrically connected to the output end of the photodetector; the output end of the interface output unit serves as the first output end of the signal processing module, and is used to output a voltage analog signal; The power supply input end of the pre-attenuator unit is electrically connected to the output end of the power supply module; the power supply input end of the A / D conversion unit is electrically connected to the output end of the power supply module; the power supply input end of the digital signal processing unit is electrically connected to the output end of the power supply module; the power supply input end of the first D / A conversion unit is electrically connected to the output end of the power supply module; the power supply input end of the second D / A conversion unit is electrically connected to the output end of the power supply module; the power supply input end of the first post-stage amplifier unit is electrically connected to the output end of the power supply module; and the power supply input end of the second post-stage amplifier unit is electrically connected to the output end of the power supply module.

8. A detection device for pulse current of a simulated lightning test platform as claimed in claim 7, characterized in that: The signal processing module also includes: a dip switch unit; The output end of the DIP switch unit is electrically connected to the control end of the digital signal processing unit; The input end of the DIP switch unit serves as the control input end of the detection device; The dip switch unit is used to control the attenuation ratio of the digital signal processing unit.

9. A detection device for pulse current of a simulated lightning test platform as claimed in claim 2, characterized in that: The power module comprises: a first power chip, a second power chip, a first resistor, a second resistor, a first filter capacitor and a second filter capacitor; The sixth pin of the first power chip is grounded; the thirteenth pin of the first power chip is grounded; the eighth pin of the first power chip is electrically connected to the first end of the first resistor; the ninth pin of the first power chip is electrically connected to the second end of the first filter capacitor; the tenth pin of the first power chip is electrically connected to the first end of the first filter capacitor; the eleventh pin of the first power chip is electrically connected to the first end of the first filter capacitor; the twelfth pin of the first power chip is electrically connected to the first end of the first filter capacitor; The second end of the first resistor is electrically connected to the second end of the first filter capacitor; The second end of the first filter capacitor is grounded; The sixth pin of the second power chip is grounded; the eighth pin of the second power chip is electrically connected to the first end of the second resistor; the ninth pin of the second power chip is electrically connected to the second end of the second filter capacitor; the tenth pin of the second power chip is electrically connected to the first end of the second filter capacitor; the eleventh pin of the second power chip is electrically connected to the first end of the second filter capacitor; the twelfth pin of the second power chip is electrically connected to the first end of the second filter capacitor; The second end of the second resistor is electrically connected to the second end of the second filter capacitor; The second terminal of the second filter capacitor is grounded; The first pin, the second pin, the third pin, the fourth pin and the seventh pin of the first power chip are all used as the input end of the power module; the first pin, the second pin, the third pin, the fifth pin and the thirteenth pin of the second power chip are all used as the input end of the power module; The first end of the first filter capacitor and the first end of the second filter capacitor both serve as output ends of the power module.

10. A method for detecting pulse current of a simulated lightning test platform, characterized in that: A detection device for pulse current of a simulated lightning strike test platform according to any one of claims 1 to 9, comprising: Controlling the light source to input an optical signal to the photoelectric conversion module; When the current signal detection end of the photoelectric conversion module detects that a pulse current passes through the measured current wire, the photoelectric conversion module is controlled to convert the optical signal into a voltage signal, and then the signal processing module is controlled to convert the voltage signal into a voltage analog signal; The detection result of the pulse current of the simulated lightning test impact platform is obtained according to the voltage simulation signal.

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