An anti-jamming test device for electromagnetic compatibility testing

Abstract

The application discloses an anti-interference test equipment for electromagnetic compatibility test, and belongs to the technical field of electromagnetic compatibility detection, which comprises a base, a positioning groove is arranged on the base, detection walls are arranged on the two sides of the positioning groove, a transverse array module is arranged in the positioning groove, a longitudinal array module is arranged in the detection wall, a slide rail is arranged on the side of the positioning groove, a transverse sliding table driven by a transverse moving mechanism is installed on the slide rail, a guide rail is arranged on the transverse sliding table, a longitudinal sliding table is installed on the guide rail, and an execution assembly is installed on the longitudinal sliding table. The arc guiding assembly is arranged, electrolyte can be coated on the surface of the measured body in advance to form a high-conductivity path before the test, the electromagnetic units and the ultrasonic units are arranged in a chessboard grid staggered manner, the coupling and cooperation of electromagnetic fields and ultrasonic wave fields in space are realized, the multi-physical field composite interference environment under complex working conditions is simulated, and the test accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic compatibility testing technology, and in particular to an anti-interference testing device for electromagnetic compatibility testing. Background Technology

[0002] The electromagnetic compatibility and environmental reliability of existing industrial switches are directly related to the safety and stable operation of the entire system. Therefore, rigorous electromagnetic compatibility and anti-interference tests must be conducted during the equipment research and development and certification phases. In real-world applications, equipment is often exposed to multiple physical stresses simultaneously or nearly simultaneously. For example, airborne electronic equipment, while subjected to engine vibration and electromagnetic radiation from airborne radar, may still face the threat of electrostatic discharge due to human operation. However, existing electromagnetic compatibility testing equipment typically applies interference stresses of different natures separately. This method of testing separately cannot simulate the potential failure modes under such combined effects, resulting in insufficient test coverage and the risk of missed detections. In electrostatic discharge testing, the breakdown path of the discharge arc is random, making it difficult to precisely control its action on specific sensitive points of the equipment. This results in a low fault reproduction rate, making it difficult for engineers to conduct targeted analysis and improvement for specific faults. To address this issue, an anti-interference testing device for electromagnetic compatibility testing is proposed. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of electromagnetic compatibility testing in the prior art, which cannot simulate real composite working conditions and has poor repeatability, and to propose an anti-interference testing device for electromagnetic compatibility testing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An anti-interference testing device for electromagnetic compatibility testing includes a base on which a switch under test is placed. The base has a positioning groove for initial positioning of the switch under test. Detection walls are located on both sides of the positioning groove. A horizontal array module is located within the positioning groove, and a vertical array module is located inside the detection walls. A slide rail is located on the side of the positioning groove, and a horizontal slide table driven by a lateral movement mechanism is mounted on the slide rail. A guide rail is located on the horizontal slide table, and a vertical slide table is mounted on the guide rail. An execution component is mounted on the vertical slide table. Both the horizontal array module and the vertical array module are composed of several electromagnetic units and ultrasonic units arranged alternately. The electromagnetic units and ultrasonic units are densely integrated in the same plane with adjacent intervals to form a checkerboard pattern. The execution component includes a test cylinder and an auxiliary cylinder mounted on a longitudinal slide. The auxiliary cylinder is inclined so that its output end faces the working area. The test cylinder is equipped with an electrostatic discharge generator, and the auxiliary cylinder is equipped with an arc guiding component. The arc guiding assembly includes a mounting sleeve, which is installed at the end of the auxiliary cylinder and has fastening bolts. A marking syringe is fitted inside the mounting sleeve. The marking syringe is composed of a marking head and an infusion cylinder, with the marking head located at the front end of the marking syringe.

[0005] Preferably, the electromagnetic unit includes an electromagnetic housing, and a patch antenna is installed inside the electromagnetic housing to simulate electromagnetic interference.

[0006] Preferably, the ultrasonic unit includes an ultrasonic housing, in which a piezoelectric ceramic transducer is installed. The acoustic energy is controlled by the phase control of the array, thereby simulating environmental vibration.

[0007] Preferably, the infusion cylinder has a converging section at its front end, and the outer wall of the converging section has a threaded layer for connecting the marker head. The rear end of the infusion cylinder has a push spring, and the front end of the push spring is equipped with a push piston. The front end of the push piston and the output end of the converging section form a liquid storage cavity, which is filled with electrolyte.

[0008] Preferably, the rear end of the push piston is provided with a pull rod, the rod of which passes through the rear end of the infusion cylinder.

[0009] Preferably, the rear end of the marking head is provided with a connecting groove, the front end of the marking head is provided with an installation groove, a marking telescopic rod is installed in the installation groove, the marking head is provided with a flow channel for guiding the electrolyte from the storage chamber to the marking telescopic rod, and one end of the flow channel facing the marking telescopic rod is provided with an annular outlet to ensure uniform seepage of electrolyte.

[0010] Preferably, the end of the marking telescopic rod away from the mounting groove is provided with a sealing pad, the surface of the sealing pad is provided with a sponge block, which serves as a carrier of electrolyte and an application head, and the rod body of the marking telescopic rod is fitted with a return spring.

[0011] Preferably, the end of the guide rail facing the interface of the switch under test is arc-shaped, and the angle of the execution component is adjusted during the test to align it with the interfaces on each side of the switch under test.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up an arc guiding component, the present invention can pre-coat the surface of the test object with an electrolyte to form a highly conductive path before testing. This path can accurately guide the breakdown trajectory of the subsequent electrostatic discharge arc, ensuring that the discharge fault will inevitably occur in the preset weak or critical area, realizing the repeatability of specific fault modes, thereby improving the accuracy of testing.

[0013] 2. By setting up electromagnetic and ultrasonic units arranged in a checkerboard pattern, the present invention achieves spatial coupling and coordination of electromagnetic and ultrasonic fields. It can simultaneously or sequentially apply electromagnetic interference and mechanical vibration stress to the same local area of ​​the device under test, thereby realistically simulating the multi-physics field composite interference environment under complex working conditions and improving the authenticity of the test. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the back structure of an anti-interference testing device for electromagnetic compatibility testing proposed in this invention. Figure 2 This is a front structural schematic diagram of an anti-interference testing device for electromagnetic compatibility testing proposed in this invention. Figure 3 This is a structural assembly diagram of an anti-interference testing device for electromagnetic compatibility testing proposed in this invention; Figure 4 This is a schematic diagram of the structure of the execution component in an anti-interference test device for electromagnetic compatibility testing proposed in this invention; Figure 5 This is a schematic diagram of the arc guiding component in the working state of an anti-interference testing device for electromagnetic compatibility testing proposed in this invention; Figure 6 This is a structural assembly diagram of the arc guiding component in an anti-interference testing device for electromagnetic compatibility testing proposed in this invention; Figure 7 This is a cross-sectional view of the marker head in an anti-interference testing device for electromagnetic compatibility testing proposed in this invention; Figure 8 This is a schematic diagram of the structure of the horizontal array module in an anti-interference testing device for electromagnetic compatibility testing proposed in this invention; Figure 9 This is a structural assembly diagram of the electromagnetic unit and the ultrasonic unit in an anti-interference testing device for electromagnetic compatibility testing proposed in this invention.

[0015] In the diagram: 1. Base; 101. Positioning groove; 102. Detection wall; 2. Slide rail; 3. Transverse slide table; 301. Guide rail; 4. Longitudinal slide table; 5. Electrostatic discharge generator; 6. Mounting sleeve; 7. Marking head; 8. Infusion cylinder; 9. Electromagnetic housing; 10. Patch antenna; 11. Ultrasonic housing; 12. Piezoelectric ceramic transducer; 13. Push spring; 14. Push piston; 15. Pull rod; 16. Mounting groove; 17. Marking telescopic rod; 18. Flow channel; 19. Liquid outlet; 20. Sealing gasket; 21. Sponge block; 22. Return spring; 23. Test switch. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0019] Example, refer to Figures 1 to 9An anti-interference testing device for electromagnetic compatibility testing includes a base 1, on which a switch under test 23 is placed. The base 1 has a positioning groove 101 for preliminary positioning of the switch under test 23. Detection walls 102 are provided on both sides of the positioning groove 101. A horizontal array module is provided inside the positioning groove 101, and a vertical array module is provided inside the detection wall 102. A slide rail 2 is provided on the side of the positioning groove 101. A horizontal slide table 3 driven by a horizontal movement mechanism is installed on the slide rail 2. A guide rail 301 is provided on the horizontal slide table 3. A vertical slide table 4 is installed on the guide rail 301. An execution component is installed on the vertical slide table 4. Both the horizontal array module and the vertical array module are composed of several electromagnetic units and ultrasonic units arranged alternately. The electromagnetic units and ultrasonic units are densely integrated in the same plane in an adjacent interval, forming a checkerboard pattern, which makes the electromagnetic field and the ultrasonic field highly coupled and coordinated in space. It can synchronously or apply electromagnetic interference and mechanical vibration stress to a specific local area of ​​the switch under test 23 or in a specific time sequence. The execution components include a test cylinder and an auxiliary cylinder mounted on a longitudinal slide 4. The auxiliary cylinder is tilted so that its output end faces the working area. The test cylinder is equipped with an electrostatic discharge generator 5, and the auxiliary cylinder is equipped with an arc guiding component, which can pre-create a highly conductive physical path on the surface of the test object. The arc guiding assembly includes a mounting sleeve 6, which is installed at the end of the auxiliary cylinder and has fastening bolts. A marking syringe is installed inside the mounting sleeve 6. The marking syringe is composed of a marking head 7 and an infusion cylinder 8. The marking head 7 is located at the front end of the marking syringe.

[0020] Furthermore, the electromagnetic unit includes an electromagnetic housing 9, and a patch antenna 10 is installed inside the electromagnetic housing 9 to simulate electromagnetic interference; The further advantage of adopting the above is that by independently controlling each patch antenna 10 in the array, it is possible to simulate environmental background radiation and accurately reproduce complex near-field coupling interference in reality.

[0021] Furthermore, the ultrasonic unit includes an ultrasonic housing 11, in which a piezoelectric ceramic transducer 12 is installed. The acoustic energy is controlled by the phase control of the array, thereby simulating environmental vibration. The further advantage of adopting the above is that by independently exciting each piezoelectric ceramic transducer 12 in the array, dynamic focusing of ultrasonic energy can be achieved, and specific wavefront modes (such as plane waves, focused waves, and scanning waves) can be generated, thereby simulating the mechanical environment of different scenarios, from broadband vibrations caused by aircraft engines to periodic swaying during vehicle operation.

[0022] Furthermore, the infusion cylinder 8 has a converging section at the front end, and the outer wall of the converging section has a threaded layer for connecting the marking head 7. The rear end of the infusion cylinder 8 is provided with a push spring 13, and a push piston 14 is installed at the front end of the push spring 13. The front end of the push piston 14 and the output end of the converging section form a liquid storage cavity, which is filled with electrolyte. Furthermore, a pull rod 15 is provided at the rear end of the push piston 14, and the rod body of the pull rod 15 passes through the rear end of the infusion cylinder 8; Furthermore, the rear end of the marking head 7 is provided with a connecting groove, the front end of the marking head 7 is provided with an installation groove 16, a marking telescopic rod 17 is installed in the installation groove 16, and a flow channel 18 is provided in the marking head 7 to guide the electrolyte from the storage chamber to the marking telescopic rod 17. One end of the flow channel 18 facing the marking telescopic rod 17 is provided with an annular outlet 19 to ensure that the electrolyte seeps out evenly. Furthermore, a sealing pad 20 is provided at the end of the marking telescopic rod 17 away from the mounting groove 16, and a sponge block 21 is provided on the surface of the sealing pad 20 to serve as a carrier of electrolyte and an application head. A return spring 22 is sleeved on the rod body of the marking telescopic rod 17. The further advantage of the above method is that when in contact with the surface under test, the sealing gasket 20 is pressed back, causing the sponge block 21 to align with the liquid outlet 19 and be wetted by the electrolyte. The sponge block 21 releases the electrolyte evenly onto the surface of the switch 23 under test through capillary action, forming a circular electrolyte wet mark as a marker. This mark, as a conductive path, significantly changes the breakdown characteristics of the subsequent discharge, ensuring that the discharge arc will inevitably break through the marked area, thus realizing the function of fault simulation and reproduction.

[0023] Furthermore, the end of the guide rail 301 facing the interface of the switch under test 23 is set to be arc-shaped, so that the angle of the execution component can be adjusted during the test to align it with the interfaces on each side of the switch under test 23. When using this invention, the switch under test 23 is placed in the positioning slot 101 of the base 1, and the port of the switch under test 23 is connected to the terminal in the prior art via a network cable. During testing, the control system drives the transverse slide 3 and the longitudinal slide 4 according to the planned path coordinates, positioning the arc guide component installed on the execution component above the starting point of the path. The auxiliary cylinder is activated, pushing the marker syringe forward, so that the sponge block 21 at its front end contacts the surface of the shell of the switch 23 under test and is squeezed. After being squeezed, the marker telescopic rod 17 retracts, so that the outlet 19 is aligned with the sponge block 21. At this time, under the elastic force of the push spring 13, the piston pushes the electrolyte to flow out, so that the electrolyte flows out from the outlet 19 and wets the sponge block 21, finally leaving electrolyte wet marks on the surface under test, which significantly changes the breakdown characteristics of subsequent discharge. Simultaneously, the patch antennas 10 in each electromagnetic unit are independently excited according to the beamforming algorithm, and the piezoelectric ceramic transducers 12 in each ultrasonic unit are activated, generating focused or scanning ultrasonic waves through phase control to apply local mechanical vibration stress to the same area, thereby simulating the most severe combined working conditions that the equipment may encounter in real operation, taking the test of an airborne switch as an example: The horizontal array module simulates vertical vibration and radar illumination, the vertical array module on one side simulates engine vibration, and the vertical array on the other side simulates communication antenna crosstalk, thus achieving accurate simulation of the aircraft operation scenario. Under the continuous action of the composite stress field, the test cylinder drives the electrostatic discharge generator 5 forward, so that its discharge electrode is precisely aligned with the electrolyte mark and triggers the discharge. Since the pre-made electrolyte path forms a low-impedance channel, the discharge arc will be highly guided and develop along the preset trajectory, eventually breaking through the marked area, thus realizing the function of fault simulation and reproduction.

[0024] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An anti-interference testing device for electromagnetic compatibility testing, comprising a base (1), wherein a switch under test (23) is placed on the surface of the base (1), characterized in that, The base (1) is provided with a positioning groove (101) for preliminary positioning of the switch (23) under test. The positioning groove (101) is provided with detection walls (102) on both sides. The positioning groove (101) is provided with a horizontal array module. The detection wall (102) is provided with a vertical array module. The positioning groove (101) is provided with a slide rail (2) on the side. The slide rail (2) is provided with a horizontal slide table (3) driven by a horizontal movement mechanism. The horizontal slide table (3) is provided with a guide rail (301). The guide rail (301) is provided with a vertical slide table (4). The vertical slide table (4) is provided with an execution component. Both the horizontal array module and the vertical array module are composed of several electromagnetic units and ultrasonic units arranged alternately. The electromagnetic units and ultrasonic units are densely integrated in the same plane with adjacent intervals to form a checkerboard pattern. The execution component includes a test cylinder and an auxiliary cylinder mounted on a longitudinal slide (4). The auxiliary cylinder is inclined so that its output end faces the working area. The test cylinder is equipped with an electrostatic discharge generator (5), and the auxiliary cylinder is equipped with an arc guiding component. The arc guiding assembly includes a mounting sleeve (6), which is mounted on the end of the auxiliary cylinder and has fastening bolts. A marking syringe is fitted inside the mounting sleeve (6). The marking syringe is composed of a marking head (7) and an infusion cylinder (8). The marking head (7) is located at the front end of the marking syringe.

2. The anti-interference testing equipment for electromagnetic compatibility testing according to claim 1, characterized in that, The electromagnetic unit includes an electromagnetic housing (9), and a patch antenna (10) is installed inside the electromagnetic housing (9) to simulate electromagnetic interference.

3. The anti-interference testing equipment for electromagnetic compatibility testing according to claim 1, characterized in that, The ultrasonic unit includes an ultrasonic housing (11), in which a piezoelectric ceramic transducer (12) is installed. The acoustic energy is controlled by the phase control of the array, thereby simulating environmental vibration.

4. The anti-interference testing equipment for electromagnetic compatibility testing according to claim 1, characterized in that, The infusion cylinder (8) has a converging section at its front end. The outer wall of the converging section has a threaded layer for connecting the marker head (7). The rear end of the infusion cylinder (8) has a push spring (13). The front end of the push spring (13) is equipped with a push piston (14). The front end of the push piston (14) and the output end of the converging section form a liquid storage chamber, which is filled with electrolyte.

5. An anti-interference testing device for electromagnetic compatibility testing according to claim 4, characterized in that, The push piston (14) has a pull rod (15) at its rear end, and the rod of the pull rod (15) passes through the rear end of the infusion cylinder (8).

6. The anti-interference testing equipment for electromagnetic compatibility testing according to claim 1, characterized in that, The marker head (7) has a connecting groove at its rear end and an installation groove (16) at its front end. A marker telescopic rod (17) is installed in the installation groove (16). A flow channel (18) is provided in the marker head (7) to guide the electrolyte from the storage chamber to the marker telescopic rod (17). An outlet (19) is provided at one end of the flow channel (18) facing the marker telescopic rod (17) to ensure that the electrolyte seeps out evenly.

7. The anti-interference testing equipment for electromagnetic compatibility testing according to claim 6, characterized in that, The end of the marking telescopic rod (17) away from the mounting groove (16) is provided with a sealing pad (20), and the surface of the sealing pad (20) is provided with a sponge block (21) as a carrier of electrolyte and an application head. The rod body of the marking telescopic rod (17) is fitted with a return spring (22).

8. The anti-interference testing equipment for electromagnetic compatibility testing according to claim 1, characterized in that, The guide rail (301) is arc-shaped at one end facing the interface of the switch under test (23). During the test, the angle of the execution component is adjusted so that it is aligned with the interfaces on each side of the switch under test (23).

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