Electrostatic field testing device and testing method thereof

Abstract

The present application relates to a kind of electrostatic field test equipment, comprising: master unit;Electrostatic field simulation calculation module, connected with the master unit, responsible for simulation calculation obtains the electric field simulation data of actual measured space electric field environment;Electric field simulator, connected with the master unit, responsible for generating consistent with actual space environment electric field signal;Antenna radome, connected with the electric field simulator by first shielding cable, can be used to simulate changing electric field.The present application also provides a kind of test method, can simulate the electrostatic field change of the flight process of air target by two modes of antenna radome with static electricity and antenna radome without static electricity, realizes the test evaluation of the overall performance of electrostatic detection system.

Description

Technical Field

[0001] This invention relates to the field of detection system testing, and more specifically to an electrostatic field testing device and its testing method. Background Technology

[0002] Electrostatic discharge (ESD) is a ubiquitous physical phenomenon. During movement, any object accumulates a large amount of charge on its surface due to various charging processes such as collisions, friction, and separation with its surroundings and with other objects. The electrostatic field generated during target movement is a usable information source; any moving object using an engine will inevitably acquire static electricity due to various charging processes. The theoretical basis of the electrostatic detection system simulation testing method is the principle of electrostatic fields. It generates the target's electrostatic field characteristics by simulating the changes in the electrostatic field during the flight of an aerial target, and outputs electric field signals and information about the target. It has technical advantages such as high testing accuracy and strong anti-interference capabilities, and has broad application prospects in the field of atmospheric electrostatic field detection systems, precise target detection systems, and other system testing methods.

[0003] Currently, significant research has been conducted in China on key technologies for electrostatic detection system testing methods, achieving certain results in areas such as target charging mechanisms, target charging characteristics, and detection system testing methods. The charging laws of triboelectric charging, inductive charging, plasma charging generated by engine combustion, and charging by adsorbed charged particles, as well as the influence of different methods on the charge of different targets, have been mastered. Through numerical calculations, software simulations, analog tests, and real-field field tests, the electric field characteristics of some typical targets have been obtained, providing a basis for equivalent simulation testing methods for electrostatic detection systems. However, research on domestic electrostatic detection system testing methods is still in the qualitative analysis stage, and numerical simulation analysis can no longer meet the needs of the engineering application of electrostatic technology. Furthermore, high-speed dynamic field tests suffer from drawbacks such as long cycles, high costs, and difficulty in controlling the flight attitude.

[0004] Therefore, in order to verify the performance indicators of electrostatic field products on the ground and ensure the reliability of product operation, it is urgent to carry out research on the laboratory equivalent simulation test method of electrostatic detection system. This method simulates the electrostatic field changes during the flight of an aerial target in a laboratory environment and generates electrostatic field characteristics for laboratory equivalent simulation test of electrostatic detection system, providing data support for the parameter design of electrostatic detection system. Summary of the Invention

[0005] The purpose of this invention is to provide an electrostatic field testing device and its testing method, which can couple an equivalent electrostatic field onto the surface of an electrostatic antenna in two modes, with and without an electrostatic antenna cover, and through electric field radiation coupling, to achieve the testing and evaluation of the overall performance of the electrostatic detection system.

[0006] To achieve the above objectives, the present invention provides an electrostatic field testing device, comprising: a main control unit; an electrostatic field simulation calculation module connected to the main control unit, responsible for simulating and calculating the electric field simulation data of the actual measured space electric field environment; an electric field simulator connected to the main control unit, responsible for generating an electric field signal consistent with the actual space environment; and an antenna protective cover connected to the electric field simulator through a first shielded cable, which can be used to simulate changing electric fields.

[0007] Furthermore, the electrostatic field testing equipment is communicatively connected to the electrostatic detection system; the electrostatic detection system includes: an analog-to-digital sampling end, which is connected to the antenna protective cover via an electrostatic antenna, and the analog-to-digital sampling end is connected to the electric field simulator via a second shielded cable; and a communication output end, which is connected to the main control unit via a communication cable, and transmits the information converted by the analog-to-digital sampling end to the main control unit.

[0008] Furthermore, the electrostatic field testing equipment also includes a host computer, which is connected to the main control unit and the electrostatic field simulation calculation module, respectively.

[0009] The host computer can control the electrostatic field simulation calculation module to calculate electric field simulation model data that is consistent with the real electrostatic field environment; it can also interact with the main control unit through the USB interface and display the information from the communication output terminal in the form of numbers and charts.

[0010] Furthermore, the main control unit can control the electric field simulator to generate different electrostatic field characteristic signals based on the test timing of the electric field simulation data calculated by the electrostatic field simulation calculation module.

[0011] Furthermore, the characteristic signal of the test electric field generated by the electrostatic field testing equipment can be one or more channels, depending on the number of electrostatic detection channels.

[0012] This invention also provides an electrostatic field testing method, implemented using the aforementioned electrostatic field testing equipment, comprising the following steps: S1, generating electric field simulation model data consistent with the real electrostatic field environment through the electrostatic field simulation calculation module; S2, loading the electric field simulation data into the internal memory of the main control unit; S3, the main control unit controls the timing of the electric field simulation data generated from the electrostatic field simulation calculation module to control the electric field simulator to generate different electrostatic field characteristic signals, and communicates with the electrostatic detection system to record parameters such as the output signal and data calculation signal of the electrostatic detection system; S4, displaying the parameters in real time through the host computer to test and evaluate the working performance of the entire electrostatic detection system.

[0013] Furthermore, the electrostatic field testing equipment has two working modes: with antenna cover mode and without antenna cover mode.

[0014] The purpose of the test with antenna cover is to simulate the changing electrostatic field encountered by the sensor during actual use, and to test and verify the entire detection system; the purpose of the test without antenna cover is to simulate the voltage amplitude signal formed by the changing electrostatic field through the electrostatic antenna during actual use, and to verify the signal processor of the detection system.

[0015] Furthermore, in the mode with antenna radome, the electrostatic field testing equipment generates an electric field signal consistent with the actual space environment through the electric field simulator. The generated electric field signal is loaded onto the input end of the antenna radome through the first shielded cable, so that the antenna radome generates a test electrostatic field through radiation.

[0016] Furthermore, in the mode without an antenna protective cover, the electrostatic field testing equipment generates a digital electric field signal proportional to the actual spatial environment through the electric field simulator. The generated digital electric field signal is directly loaded onto the analog-to-digital sampling end of the electrostatic detection system through the second shielded cable. In this operating mode, the generated digital electric field signal bypasses the electrostatic antenna and directly enters the analog-to-digital sampling end.

[0017] In summary, compared with the prior art, the electrostatic field testing device and method of the present invention have the following beneficial effects:

[0018] (1) Using electrostatic field simulation testing equipment, the electrostatic detection system can be tested and verified under laboratory conditions.

[0019] (2) Based on the principle of electrostatic field induction, the equivalent test of the electrostatic detection system is realized through two modes: with and without electrostatic antenna cover.

[0020] (3) A test method using an electrostatic radome is proposed, which couples an equivalent electrostatic field onto the surface of an electrostatic antenna through electric field radiation coupling, thereby enabling the testing of the electrostatic detection system;

[0021] (4) It is proposed to use an electrostatic field simulation calculation module to calculate and obtain electric field simulation data of the actual measured space electric field environment, including the target electric field and the interference electric field.

[0022] (5) This invention can provide a test environment for the electrostatic detection system to detect the electrostatic field in space, test and evaluate the overall performance of the electrostatic detection system, and provide data support for the test and delivery of the whole machine. Attached Figure Description

[0023] Figure 1This is a schematic diagram illustrating the composition and principle of the electrostatic field testing equipment of the present invention;

[0024] Figure 2 This is a schematic diagram illustrating the test principle of the present invention with an antenna protective cover.

[0025] Figure 3 This is a schematic diagram of the electric field signal generation method with antenna protective cover of the present invention;

[0026] Figure 4 This is a schematic diagram of the test principle of the present invention without an antenna protective cover.

[0027] Figure 5 This is a signal characteristic diagram of the electrostatic field testing equipment of the present invention;

[0028] Figure 6 This is a circuit schematic diagram of the main control unit of the present invention. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and by providing a detailed description of a preferred embodiment.

[0030] like Figure 1 As shown in the figure, this is a schematic diagram illustrating the composition and principle of an electrostatic field testing device according to the present invention. The electrostatic field testing device is communicatively connected to an electrostatic detection system unit 7. The electrostatic field testing device includes: a main control unit 1; an electrostatic field simulation calculation module 3 connected to the main control unit 1, responsible for simulating and calculating the electric field simulation data of the actual measured space electric field environment; an electric field simulator 4 connected to the main control unit 1, responsible for generating an electric field signal consistent with the actual space environment; and an antenna protective cover 5 connected to the electric field simulator 4 via a first shielded cable 6, which can be used to simulate changing electric fields.

[0031] Furthermore, the electrostatic detection system 7 includes: an analog-to-digital sampling (ADC) terminal 71, which is connected to the antenna protective cover 5 via an electrostatic antenna 8, and the ADC terminal 71 is connected to the electric field simulator 4 via a second shielded cable 9; and a communication output terminal 72, which is connected to the main control unit 1 via a communication cable 10, and transmits the information converted by the ADC terminal 71 to the main control unit 1.

[0032] Furthermore, the electrostatic field testing equipment also includes a host computer 2, which is connected to the main control unit 1 and the electrostatic field simulation calculation module 3 respectively. The host computer 2 can be used to realize human-computer interaction functions and can control the electrostatic field simulation calculation module 3 to calculate electric field simulation model data consistent with the real electrostatic field environment. The host computer 2 can also interact with the main control unit 1 through a USB interface, displaying the information from the communication output terminal 72 in the form of numbers and charts, and exporting it as a plain text file to test and evaluate the working performance of the electrostatic detection system.

[0033] Furthermore, the electric field simulation data calculated by the electrostatic field simulation calculation module 3 includes the target electric field and the interference electric field, and generates electrostatic characteristic curves through the electric field simulator 4.

[0034] Furthermore, the main control unit 1 is used to perform information interaction between the host computer 2 and the electrostatic field simulation calculation module 3, and to load the electric field simulation data calculated by the electrostatic field simulation calculation module 3 into the internal memory of the main control unit 1.

[0035] Furthermore, the main control unit 1 can also control the electric field simulator 4 to generate different electrostatic field characteristic signals according to the test timing of the electric field simulation data calculated by the electrostatic field simulation calculation module 3, and realize communication with the electrostatic detection system 7.

[0036] Furthermore, the electrostatic field testing equipment has two working modes: with antenna cover mode (working mode 1) and without antenna cover mode (working mode 2).

[0037] Furthermore, such as Figure 5 As shown in the figure, this figure is a signal characteristic diagram of the electrostatic field testing equipment of the present invention. It shows the characteristics of an electrostatic field signal output by one analog output, including electric field characteristic signal and electric field interference signal, and generates an electrostatic characteristic curve through the electric field simulator 4.

[0038] Furthermore, the electric field simulation calculation module 3 can generate a TXT data format file, which mainly consists of electric field simulation signals and voltage simulation signals for each channel. The electric field simulation signal is used to load the input terminal of the antenna protective cover 5 in working mode 1 through an internal communication connection, while the voltage simulation signal is used to load the analog-to-digital sampling terminal 71 in working mode 2 through an internal communication connection.

[0039] like Figure 2As shown in the figure, this is a test principle diagram of the present invention with antenna protection mode. The electrostatic field test equipment generates an electric field signal consistent with the actual space environment through the electric field simulator 4. The generated electric field signal is loaded at the input end of the antenna protection 5 through the first shielded cable 6, so that the antenna protection 5 generates a test electrostatic field by radiation.

[0040] Furthermore, such as Figure 3 As shown in the figure, this figure is a schematic diagram of the electric field signal generation method with antenna protective cover mode of the present invention. The antenna protective cover 5 is a metal plate installed parallel to the outside of the electrostatic antenna 8, which can form a parallel plate capacitor between the antenna protective cover 5 and the electrostatic antenna 8 to simulate a changing electric field.

[0041] Furthermore, if the charge sensed by the electrostatic antenna 8 completely covers the area of ​​the antenna protective cover 5, and its projection does not cover the adjacent electrostatic antenna sensing electrodes, then the charge on each sensing electrode of the electrostatic antenna 8 is proportional to the voltage applied to the outer plate:

[0042] Q = K·U

[0043] The value of the conversion factor K can be calculated using the following formula:

[0044]

[0045] Among them, C 12 S1 is the capacitance of the external metal electrode plate relative to the electrostatic antenna carrier; S2 is the area of ​​the sensing electrode of each channel of the electrostatic antenna; S3 is the area of ​​the sensing electrode of each channel of the test equipment.

[0046] like Figure 4 As shown in the figure, this is a test principle diagram of the present invention without antenna protection cover mode. The electrostatic field testing equipment generates an electric field digital signal proportional to the actual space environment through the electric field simulator 4. The generated electric field digital signal is directly loaded into the analog-to-digital sampling terminal 71 of the electrostatic detection system 7 through the second shielded cable 9. In this working mode, the generated electric field digital signal does not pass through the electrostatic antenna 8 and directly enters the analog-to-digital sampling terminal 71.

[0047] Furthermore, the characteristic signal of the test electric field generated by the electrostatic field testing equipment can be one or more channels, mainly related to the number of electrostatic detection channels.

[0048] Furthermore, the present invention also provides an electrostatic field testing method, implemented using the aforementioned electrostatic field testing equipment, comprising the following processes: S1, generating electric field simulation model data consistent with the real electrostatic field environment through the electrostatic field simulation calculation module 3; S2, loading the electric field simulation data into the internal memory of the main control unit 1 via the main control unit 1; S3, controlling the timing of the electric field simulation data generated from the electrostatic field simulation calculation module 3 to control the electric field simulator 4 to generate different electrostatic field characteristic signals, and communicating with the electrostatic detection system 7 to record parameters such as the output signal and data calculation signal of the electrostatic detection system 7; S4, displaying the parameters in real time through the host computer 2 to test and evaluate the working performance of the electrostatic detection system.

[0049] Furthermore, the purpose of the test mode with antenna protection cover in this invention is to simulate the changing electrostatic field encountered by the detection sensor during actual use, and to test and verify the entire detection system; the purpose of the test mode without antenna protection cover in this invention is to simulate the voltage amplitude signal formed by the changing electrostatic field through the electrostatic antenna during actual use, and to verify the signal processor of the detection system.

[0050] Furthermore, such as Figure 6 As shown in the figure, this is a circuit schematic diagram of the main control unit of the present invention, in which FPGA, CP2102, RS422 and optical fiber are all components included in the main control unit.

[0051] The main control unit 1 first loads the TXT data format file generated by the host computer 2 into the FLASH memory through the FPGA; after loading, it reads the data from the FLASH memory through the FPGA and outputs the low-voltage and high-voltage electric field signals to each channel; it interacts with the host computer 2 through CP2102 and communicates with the electrostatic detection system 7 through RS422 and optical fiber; the main control unit 1 controls DA(1) to DA(n) through the FPGA to generate independent electric field signals. Each channel inputs the electric field analog signal into the low-pass filter through the digital-to-analog converter (DA), and generates an electric field signal in the range of -5V to +5V by selecting working mode 2 through the switch, or generates an electric field signal in the range of -50V to +50V by selecting working mode 1 through the high-voltage amplifier (1) to high-voltage amplifier (n) through the switch.

[0052] In summary, the present invention provides an electrostatic detection device and its testing method. Based on the principle of electrostatic field induction, it simulates the electrostatic field changes of an aerial target during flight using two modes: with and without an electrostatic radome. This enables the testing of the electrostatic detection system. Furthermore, an electrostatic field simulation calculation module is used to calculate and obtain electric field simulation data that corresponds to the actual electric field environment of the measured space, thereby testing and evaluating the overall performance of the electrostatic detection system.

[0053] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for testing an electrostatic field, comprising an electrostatic field testing device, characterized in that, The electrostatic field testing equipment includes: Main control unit; The electrostatic field simulation calculation module is connected to the main control unit and is responsible for simulating and calculating the electric field simulation data of the actual measured space electric field environment. An electric field simulator, connected to the main control unit, is responsible for generating an electric field signal consistent with the actual space environment. The antenna protective cover is connected to the electric field simulator via a first shielded cable to simulate a changing electric field; The electrostatic field testing method includes the following procedures: S1. Generate electric field simulation model data that is consistent with the real electrostatic field environment through the electrostatic field simulation calculation module. S2. Load the electric field simulation data into the internal memory of the main control unit; S3. The main control unit controls the timing of the electric field simulation data generated from the electrostatic field simulation calculation module to control the electric field simulator to generate different electrostatic field characteristic signals, and communicates with the electrostatic detection system to record the output signal and data calculation signal parameters of the electrostatic detection system. S4. The parameters are displayed in real time via a host computer to test and evaluate the performance of the electrostatic detection system. The test is divided into two working modes: with antenna protection cover and without antenna protection cover. The purpose of the antenna-protected mode test is to simulate the changing electrostatic field encountered by the sensor during actual use, and to test and verify the entire detection system. The purpose of the test without an antenna cover is to simulate the voltage amplitude signal formed by the changing electrostatic field through the electrostatic antenna during actual use, in order to verify the signal processor of the detection system. In the antenna radome mode, the electrostatic field testing equipment generates an electric field signal consistent with the actual space environment through the electric field simulator. The generated electric field signal is applied to the input end of the antenna radome through the first shielded cable, causing the antenna radome to generate a test electrostatic field through radiation. In the mode without antenna protection cover, the electrostatic field testing equipment generates an electric field digital signal proportional to the actual spatial environment through the electric field simulator. The generated electric field digital signal is directly loaded onto the analog-to-digital sampling end of the electrostatic detection system through the second shielded cable. In this working mode, the generated electric field digital signal does not pass through the electrostatic antenna and directly enters the analog-to-digital sampling end.

2. The electrostatic field testing method as described in claim 1, characterized in that, The electrostatic field testing equipment is communicatively connected to the electrostatic detection system; The electrostatic detection system includes: The analog-to-digital sampling terminal is connected to the antenna protective cover via an electrostatic antenna, and the analog-to-digital sampling terminal is connected to the electric field simulator via a second shielded cable; The communication output terminal is connected to the main control unit via a communication cable and transmits the information converted by the analog-to-digital sampling terminal to the main control unit.

3. The electrostatic field testing method as described in claim 2, characterized in that, The electrostatic field testing equipment also includes a host computer, which is connected to the main control unit and the electrostatic field simulation calculation module respectively. The host computer can control the electrostatic field simulation calculation module to calculate electric field simulation model data that is consistent with the real electrostatic field environment; it also interacts with the main control unit through the USB interface, displaying the information from the communication output terminal in the form of numbers and charts.

4. The electrostatic field testing method as described in claim 1, characterized in that, The characteristic signal of the test electric field generated by the electrostatic field testing equipment is one or more channels, which is related to the number of electrostatic detection channels.

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