Electrostatic discharge test system and method
By using fixtures, discharge mechanisms and testing mechanisms in the electrostatic discharge test system, the problem of the inability to locate the cable's electrostatic energy and noise in the prior art is solved, and efficient electrostatic discharge testing is achieved.
Patent Information
- Application Number
- CN202411846127.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-04-15
AI Technical Summary
The existing electrostatic discharge test system cannot directly locate the magnitude of the electrostatic energy coupled to each cable and the degree of interference of the electrostatic noise, resulting in low testing efficiency.
An electrostatic discharge testing system is provided, including a cable plating table, fixture, discharge mechanism and testing mechanism. The fixture is used to fix the cable to be tested, the discharge mechanism puts the cable under the preset electric field, and the test mechanism is used to measure the coupling electrostatic parameters of the cable under the preset electric field.
Through this system, the electrostatic noise coupled on a specific cable can be effectively positioned and quantified, thereby improving the electrostatic discharge test efficiency.
Smart Images
Figure CN119827862A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electrostatic discharge testing, and in particular to an electrostatic discharge testing system and method. Background Art
[0002] In the electrostatic discharge (ESD) test, the electrostatic discharge test system is used to simulate the electrostatic discharge environment of the equipment under test (EUT) or objects near the cable to measure the energy and spectrum distribution of the electrostatic discharge coupled to the cable. The electrostatic discharge test system can be used to verify the coupled electrostatic parameters of automotive electronic components under power-on operation tests to observe whether the performance of the equipment under test or the cable itself has changed during the test.
[0003] The existing electrostatic discharge test system places the bundled cables directly on the cable placement table for testing. When a problem occurs, it is impossible to directly locate the amount of electrostatic energy coupled to each cable, which cable is coupled with electrostatic noise, and the degree of interference, resulting in multiple tests required to locate the problem, and the efficiency of electrostatic discharge testing is low. Summary of the invention
[0004] In order to solve the above technical problems, the present application provides an electrostatic discharge testing system and method.
[0005] To solve the above problems, the present application provides a first technical solution: an electrostatic discharge testing system is provided, including a cable placement table, a clamp, a discharge mechanism and a testing mechanism; the cable placement table is used to place a number of cables; at least two of the clamps are arranged on the cable placement table, and the cables to be tested are passed through the two clamps, and the clamps are used to relatively fix the cables to be tested; the discharge mechanism is arranged on the cable placement table, and is used to discharge the cables on the cable placement table, so that at least part of the cables are under a preset electric field; the testing mechanism is connected to at least one of the clamps, and is used to obtain the coupled electrostatic parameters of the cables to be tested under the preset electric field when the discharge mechanism discharges.
[0006] Optionally, the fixture includes a first routing position and a second routing position, the first routing position is used for allowing the cable to be tested to pass through, and the second routing position is used to accommodate other cables except the cable to be tested, so that the other cables except the cable to be tested are placed on the cable placement table.
[0007] Optionally, the fixture includes at least one contact hole, and the cable to be tested passes through the contact hole to form the first routing position.
[0008] Optionally, the clamp comprises a plurality of contact holes, and when the clamp is disposed on the cable placement platform, distances between the plurality of contact holes and the cable placement platform are not equal.
[0009] Optionally, the electrostatic discharge test system further comprises a device placement table, which is arranged on one side of the cable placement table and connected to the cable placement table, and the device placement table is used to place a device under test, and the device under test is connected to the cable.
[0010] Optionally, the electrostatic discharge test system further comprises a rectification box, the test mechanism is connected to at least one of the fixtures via the rectification box, the rectification box is provided with a filter circuit, and the filter circuit is used to filter and shape the coupled electrostatic parameters of the cable to be tested under the preset electric field.
[0011] Optionally, the electrostatic discharge testing system includes a first clamp, a second clamp and a resistor, the resistor is arranged on the cable placement table, the first clamp and the second clamp are respectively fixed to the two ends of the cable to be tested, the first clamp is connected to the resistor, and the second clamp is connected to the testing mechanism.
[0012] To solve the above problems, the present application provides a second technical solution: providing an electrostatic discharge testing method, which is applied to the above electrostatic discharge testing system, and the above electrostatic discharge testing method includes: relatively fixing the cable to be tested by at least two clamps; discharging the above cable to be tested so that the above cable is in a preset electric field; and testing the coupled electrostatic parameters of the above cable to be tested under the above preset electric field.
[0013] Optionally, the electrostatic discharge testing system is used to test a plurality of cables, and the cables to be tested may include one or more of the cables; after the step of testing the coupled electrostatic parameters of the cables to be tested under the preset electric field to obtain the test results, the electrostatic discharge testing method further includes: when the testing of the plurality of cables is not completed, replacing the cables to be tested on the fixture to continue testing the coupled electrostatic parameters of the next cable to be tested under the preset electric field; after the testing of the plurality of cables is completed, obtaining the test results of the cables.
[0014] Optionally, after the step of testing the coupled electrostatic parameters of the cable to be tested under the preset electric field, the electrostatic discharge testing method further includes: when the coupled electrostatic parameters do not meet the preset requirements, connecting the fixture to a filter circuit, the filtering range of the filter circuit corresponding to the waveform of the coupled electrostatic parameters; continuing to test the cable to be tested to obtain the rectification parameters after filtering; and / or, before the step of relatively fixing the cable to be tested by at least two fixtures so that the cable to be tested is connected to the testing mechanism through the fixture, the electrostatic discharge testing method further includes: connecting the cable to the interface of the device under test.
[0015] The present application provides an electrostatic discharge test system and method, the electrostatic discharge test system includes a cable placement platform, a fixture, a discharge mechanism and a test mechanism; the cable placement platform is used to place a number of cables; at least two fixtures are arranged on the cable placement platform, the cables to be tested are passed through the two fixtures, and the fixtures are used to relatively fix the cables to be tested; the discharge mechanism is arranged on the cable placement platform, and is used to discharge the cables on the cable placement platform so that at least part of the cables are under a preset electric field; the test mechanism is connected to at least one fixture, and is used to obtain the coupled electrostatic parameters of the cables to be tested under the preset electric field when the discharge mechanism discharges. In the above manner, the electrostatic discharge test system can perform an electrostatic discharge test on a specific cable of the cable placement platform through a fixture, and when a bundle formed by a number of cables concentrated and arranged side by side is placed on the cable placement platform, the electrostatic noise coupled on a specific cable can be quantified, which can effectively improve the efficiency of the electrostatic discharge test. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:
[0017] Figure 1 is a structural schematic diagram of a first embodiment of an electrostatic discharge testing system provided by the present application;
[0018] Figure 2 yes Figure 1 A schematic structural diagram of a first embodiment of the clamp;
[0019] Figure 3 yes Figure 1 A schematic structural diagram of a second embodiment of the middle clamp;
[0020] Figure 4 is a structural schematic diagram of a second embodiment of an electrostatic discharge testing system provided by the present application;
[0021] Figure 5 is a flow chart of a first embodiment of an electrostatic discharge testing method provided by the present application;
[0022] Figure 6 is a flow chart of a second embodiment of the electrostatic discharge testing method provided by the present application;
[0023] Figure 7 is a flow chart of a third embodiment of an electrostatic discharge testing method provided by the present application;
[0024] Figure 8 is a structural schematic diagram of an embodiment of an electronic device provided by the present application;
[0025] Fig. 9 It is a structural schematic diagram of an embodiment of a computer-readable storage medium provided by the present application.
[0026] Among them, 11, cable placement table; 111, cable; 12, fixture; 121, first fixture; 122, second fixture; 123, first routing position; 124, second routing position; 125, contact hole; 13, discharge mechanism; 14, test mechanism; 15, equipment placement table; 16, rectification box; 17, resistor. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0028] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0030] The present application embodiment provides an electrostatic discharge test system. Figure 1 , Figure 1 Schematic diagram of the structure of the first embodiment of the electrostatic discharge test system provided by the present application. Figure 1 As shown, the electrostatic discharge testing system of this embodiment includes a cable placement platform 11 , a fixture 12 , a discharge mechanism 13 and a testing mechanism 14 .
[0031] The cable placement platform 11 is used to place a number of cables 111; at least two clamps 12 are arranged on the cable placement platform 11, and the cables 111 to be tested are passed through the two clamps 12, and the clamps 12 are used to relatively fix the cables 111 to be tested; the discharge mechanism 13 is arranged on the cable placement platform 11, and is used to discharge the cables 111 on the cable placement platform 11 so that at least part of the cables 111 are under a preset electric field; the testing mechanism 14 is connected to at least one clamp 12, and is used to obtain the coupled electrostatic parameters of the cable 111 to be tested under a preset electric field when the discharge mechanism 13 discharges.
[0032] Specifically, the fixture 12 can separate the cable 111 to be tested from the other cables 111 on the cable placement platform 11, so that the testing mechanism 14 can receive the coupled electrostatic parameters of the cable 111 to be tested under a preset electric field while achieving relative fixation of the cable 111 to be tested. The cable 111 to be tested can be one cable 111 or multiple cables 111; for example, the cable 111 to be tested can be all the cables 111 on the cable placement platform 11, or can be at least one cable 111 on the cable placement platform 11, which is not specifically limited here. In a possible implementation, a first grounding component can be provided on the cable placement platform 11, and the first grounding component simulates the resistance condition of the human body during discharge through a resistor 17 with a specific resistance value, controls the charge discharge speed, and reduces the risk of short circuit to the ground, thereby generating the required electrostatic field and electromagnetic field in the electrostatic discharge test to simulate the actual electrostatic discharge environment.
[0033] The discharge mechanism 13 is placed on the cable placement platform 11, and the discharge mechanism 13 is used to apply discharge to the cable placement platform 11, so that at least part of the cables 111 on the cable placement platform 11 are placed under a preset electric field, so as to simulate direct or indirect electrostatic discharge in the electrostatic discharge test. The discharge mechanism 13 can simulate different electrostatic discharge scenarios of the test device or cable 111 by controlling the conditions of electrostatic discharge, and then verify the coupled electrostatic parameters of the test device or cable 111 and other electronic components under the power-on test. Among them, when the electrostatic discharge test system is applied to the automotive field, the discharge mechanism 13 can be used to evaluate the electrostatic energy and spectrum distribution coupled by the test device or cable 111 under the preset electric field, and then evaluate the electrostatic noise of the electronic components, so as to facilitate the subsequent filtering design and rectification of the test device, the port of the cable 111, etc. according to the coupled electrostatic parameters of the test device or cable 111. In a possible implementation, the discharge mechanism 13 can also pre-store discharge waveforms corresponding to different electrostatic discharge conditions, so that the cable 111 can be placed in a preset electric field for electrostatic discharge testing.
[0034] The testing mechanism 14 is used to record the voltage and current changes of the cable 111 to be tested under a preset electric field, so as to sense the electrostatic charge coupled to the device under test or the cable 111, and obtain the corresponding coupled electrostatic parameters according to the preset judgment criteria. The coupled electrostatic parameters may include but are not limited to the electrostatic charge, residual electrostatic charge, electrostatic voltage, electrostatic current, discharge time, coupled electrostatic time domain and frequency domain waveforms, and other parameters.
[0035] The present application provides an electrostatic discharge testing system and method, which includes a cable placement platform 11, a fixture 12, a discharge mechanism 13 and a test mechanism 14; the cable placement platform 11 is used to place a plurality of cables 111; at least two fixtures 12 are arranged on the cable placement platform 11, and the cables 111 to be tested are passed through the two fixtures 12, and the fixtures 12 are used to relatively fix the cables 111 to be tested; the discharge mechanism 13 is arranged on the cable placement platform 11, and is used to discharge the cables 111 on the cable placement platform 11, so that at least part of the cables 111 are under a preset electric field; the test mechanism 14 is connected to at least one fixture 12, and is used to obtain the coupled electrostatic parameters of the cables 111 to be tested under a preset electric field when the discharge mechanism 13 discharges. In the above manner, the electrostatic discharge test system can perform an electrostatic discharge test on a specific cable 111 of the cable placement table 11 through the fixture 12. When a wiring harness formed by a number of cables 111 that are concentrated and laid side by side is placed on the cable placement table 11, the electrostatic noise coupled on a specific cable 111 can be quantified, which can effectively improve the efficiency of the electrostatic discharge test.
[0036] In one embodiment, see Figure 2 and Figure 3 , Figure 2 yes Figure 1 A schematic structural diagram of a first embodiment of the clamp, Figure 3 yes Figure 1 FIG. 2 is a schematic structural diagram of a second embodiment of the clamp. Figure 2 and Figure 3 As shown, the fixture 12 includes a first routing position 123 and a second routing position 124. The first routing position 123 is used for the cable 111 to be tested to pass through, and the second routing position 124 is used to accommodate the remaining cables 111 except the cable 111 to be tested, so that the remaining cables 111 except the cable 111 to be tested can be placed on the cable placement platform 11.
[0037] Specifically, the fixture 12 may be a conductive fixture 12, and the fixture 12 is formed with a first routing position 123 and a second routing position 124. When the cable 111 to be tested passes through the first routing position 123, it contacts the fixture 12 wall of the first routing position 123, so that the testing mechanism 14 can receive the coupled electrostatic parameters of the cable 111 to be tested through the fixture 12. The remaining cables 111 except the cable 111 to be tested are accommodated in the second routing position 124, so that the cable 111 to be tested is separated from the remaining cables 111 on the cable placement platform 11. In a possible implementation manner, the clamp 12 is placed on the cable placement platform 11, and the second routing position 124 is connected to the cable placement platform 11, so that the remaining cables 111 except the cable 111 to be tested can be directly placed on the cable placement platform 11 and accommodated in the second routing position 124, the first routing position 123 is arranged above the second routing position 124, and the hole position of the first routing position 123 is not connected to the second routing position 124.
[0038] Through the above method, the electrostatic discharge testing system of this embodiment can separate the cable 111 to be tested from the other cables 111 on the cable placement table 11 through the clamp 12, and the testing mechanism 14 can be electrically connected to the cable 111 at the first routing position 123 through the clamp 12, so that the testing mechanism 14 can quantify the electrostatic noise coupled to a specific cable 111 on the cable placement table 11, which can effectively improve the efficiency of electrostatic discharge testing.
[0039] Optionally, the fixture 12 includes at least one contact hole 125 , and the cable 111 to be tested passes through the contact hole 125 to form a first routing position 123 .
[0040] Specifically, each cable 111 passes through the contact hole 125 and contacts the hole wall of the contact hole 125 to form a first routing position 123 and enable the test mechanism 14 to be electrically connected to the cable 111 to be tested through the fixture 12. Figure 2 As shown, the number of the contact hole 125 on the clamp 12 can be one, or, as shown in FIG. Figure 3As shown, the number of the contact holes 125 on the fixture 12 can be multiple. When the number of the contact holes 125 is multiple, the arrangement of the multiple contact holes 125 on the fixture 12 can be but not limited to being arranged in the horizontal direction of the cable placement platform 11, arranged in the vertical direction of the cable placement platform 11, arranged in a rectangular array, arranged in a polygonal array, arranged in a circular array, etc. For example, the multiple contact holes 125 are arranged in an array on the fixture 12, and the shape of the array is close to a rectangle, a circle, a polygon, etc.
[0041] Through the above method, the electrostatic discharge testing system of this embodiment can clamp one or more cables 111 at the same time through the first routing position 123 of the fixture 12, so that the testing mechanism 14 can quantify the electrostatic noise coupled on the cable 111 to be tested at the first routing position 123, which can effectively improve the electrostatic discharge test efficiency.
[0042] Furthermore, the clamp 12 includes a plurality of contact holes 125 . When the clamp 12 is disposed on the cable placement platform 11 , the distances between the plurality of contact holes 125 and the cable placement platform 11 are not equal.
[0043] Specifically, Figure 3 As shown, when the fixture 12 includes a plurality of contact holes 125, the distances between the center points of the plurality of contact holes 125 and the placement plane where the cable placement platform 11 is located are not equal. Therefore, when the cable 111 to be tested passes through the contact hole 125, the distance between the cable 111 to be tested and the cable placement platform 11 can be adjusted by adjusting the position of the contact hole 125 corresponding to the cable 111 to be tested, so that the electrostatic discharge test system of this embodiment can be used to test the coupled electrostatic parameters of the cables 111 at different distances. Therefore, the electrostatic discharge test system of this embodiment can simulate the scenarios of different wiring distances and electrostatic coupling of the cable 111 on the test device, broaden the test scenarios of the electrostatic discharge test system, and effectively improve the efficiency of the electrostatic discharge test.
[0044] In one embodiment, see Figure 4 , Figure 4 Schematic diagram of the structure of the second embodiment of the electrostatic discharge test system provided by the present application. Figure 4 As shown, the electrostatic discharge test system further includes a device placement platform 15 , which is disposed on one side of the cable placement platform 11 . The device placement platform 15 is used to place a device under test, and the device under test is connected to the cable 111 .
[0045] Specifically, the device placement platform 15 and the cable placement platform 11 are arranged adjacent to each other, and the device placement platform 15 is provided with a conductive plane to place the device under test through the conductive plane. Among them, a second grounding component can be provided on the device placement platform 15, and the second grounding component is connected to the ground reference ground through a resistor 17 with a specific resistance value, so that the device under test simulates the resistance condition of the human body during discharge and ensures the effective discharge of electrostatic energy. Among them, the resistor 17 of the above-mentioned second grounding component and the second grounding component can be the same resistor 17, or different resistors 17, and the first grounding component and the second grounding component can be connected or separated, which is not specifically limited here. It can be understood that the electrostatic discharge test system of this embodiment can only place the cable 111 to be tested on the cable placement platform 11 for single verification of the cable 111; the cable 111 to be tested can also be placed on the cable placement platform 11, and the device under test can be placed on the device placement platform 15, and the cable 111 to be tested is fixed by the fixture 12 and the device under test is connected to the cable 111 to be tested. After that, the test verification is performed.
[0046] Through the above method, the electrostatic discharge testing system of this embodiment can place the device under test through the device placement table 15 to perform electrostatic discharge testing on one or some cables 111 to be tested connected to the device under test, so that the electrostatic discharge testing system of this embodiment can quantify the size of the electrostatic noise coupled by different cables 111 on the device under test, effectively improving the efficiency of electrostatic discharge testing.
[0047] In one embodiment, if Figure 4 As shown, the electrostatic discharge test system also includes a rectification box 16, and the test mechanism 14 is connected to at least one fixture 12 through the rectification box 16. The rectification box 16 is provided with a filter circuit, and the filter circuit is used to filter and shape the coupled electrostatic parameters of the cable 111 to be tested under a preset electric field.
[0048] Specifically, a filter circuit corresponding to the electrostatic discharge test is encapsulated in the rectification box 16, and the filter circuit is used to filter and shape the coupled electrostatic parameters of the cable 111 to be tested under a preset electric field, so that the time domain and frequency domain waveforms of the coupled electrostatic parameters under the preset electric field can meet the preset requirements. Among them, the filter circuit in the rectification box 16 can be pre-stored, or it can be modified or transmitted by a processor or memory connected to the rectification box 16, which is not specifically limited here. For example, several sets of corresponding filter circuits can be pre-stored in the rectification box 16 to selectively filter when facing different coupled electrostatic parameters; or, the processor can be connected to the rectification box 16 and the test mechanism 14 respectively, and the processor is used to obtain the coupled electrostatic parameters of the test mechanism 14, so as to select the corresponding filter circuit based on different coupled electrostatic parameters and control the rectification box 16 to connect to at least one fixture 12 through the selected filter circuit.
[0049] In an embodiment of the present application, a test mechanism 14 of an electrostatic discharge test system is connected to at least one fixture 12 via a rectification box 16, so that the test mechanism 14 can obtain coupled electrostatic parameters after filtering by the rectification box 16, and determine the rectification effect through the coupled electrostatic after filtering, so as to facilitate real-time verification of the effect of filtering the cable 111 to be tested, thereby effectively improving the efficiency of electrostatic discharge testing.
[0050] In one embodiment, the electrostatic discharge testing system includes a first clamp 121, a second clamp 122 and a resistor 17. The first clamp 121 and the second clamp 122 are respectively fixed to the two ends of the cable 111 to be tested, the first clamp 121 is connected to the resistor 17, and the second clamp 122 is connected to the testing mechanism 14.
[0051] Specifically, the at least two fixtures 12 mentioned above may include a first fixture 121 and a second fixture 122, the first fixture 121 is connected to a resistor 17, and the resistor 17 may be at least one resistor connected to a ground reference plane such as a cable placement platform 11, an equipment placement platform 15, etc. By connecting the first fixture 121 to the resistor 17, the cable 111 to be tested, which is arranged on the first fixture 121, can simulate the resistance condition of the human body during discharge. The second fixture 122 is connected to the test mechanism 14, so that a current path is formed between the first fixture 121, the cable 111 to be tested, and the second fixture 122. The test mechanism 14 can obtain the coupled electrostatic parameters of the cable 111 to be tested under a preset electric field through the second fixture 122, thereby realizing the quantification of the electrostatic noise coupled on a specific cable 111, and effectively improving the efficiency of the electrostatic discharge test. In a possible implementation, when the electrostatic discharge test system includes a rectification box 16, the rectification box 16 is respectively connected to the second fixture 122 and the test mechanism 14.
[0052] The present application also provides an electrostatic discharge test method, which is applied to the electrostatic discharge test system of any of the above embodiments. Figure 5 , Figure 5 1 is a flow chart of the first embodiment of the electrostatic discharge test method provided by the present application. Figure 5 As shown, in this embodiment, the electrostatic discharge testing method includes the following steps:
[0053] Step S11 : the cable 111 to be tested is relatively fixed by at least two clamps 12 , so as to separate the cable 111 to be tested from other cables 111 on the cable placement platform 11 .
[0054] Specifically, when performing an electrostatic discharge test, the relevant bundled cables 111 are placed on the cable placement platform 11, so that contact discharge is applied to the cable placement platform 11 through the discharge mechanism 13, so that the coupled electrostatic parameters of the bundled cables 111 are determined by the test mechanism 14 to determine whether the electrostatic discharge test has passed. When the coupled electrostatic parameters of the bundled cables 111 are abnormal, this embodiment can pass the cable 111 to be tested through the first routing position 123 on at least two clamps 12, and place the remaining cables 111 on the cable placement platform 11 except the cable 111 to be tested in the second routing position 124 of at least two clamps 12, so that the cable 111 to be tested is relatively fixed by at least two clamps 12, and the cable 111 to be tested is separated from the remaining cables 111 except the cable 111 to be tested, so as to facilitate the subsequent separate testing of the cable 111 to be tested.
[0055] Step S12: discharging the cable 111 to be tested so that the cable 111 to be tested is placed under a preset electric field.
[0056] After fixing the cable 111 to be tested, the cable 111 to be tested can be discharged by coupling discharge on the cable placement platform 11, etc., so that the cable 111 to be tested is placed in a preset electric field. The preset electric field can be understood as an electrostatic field that simulates the human body environment.
[0057] Step S13: testing the coupled electrostatic parameters of the cable 111 to be tested under a preset electric field.
[0058] Specifically, when the cable 111 to be tested is in a preset electric field, the coupled electrostatic parameters of the cable 111 to be tested under the preset electric field are tested by the testing mechanism 14 to obtain the coupled electrostatic parameters of the cable 111 to be tested, so as to facilitate the subsequent evaluation of the anti-interference performance, the magnitude of radiation interference, the safety of electrostatic discharge, etc. of the cable 111 under the preset electric field according to the coupled electrostatic parameters.
[0059] In an embodiment of the present application, the electrostatic discharge testing method of this embodiment relatively fixes the cable 111 to be tested by at least two clamps 12 to separate the cable 111 to be tested from the other cables 111 on the cable placement table 11, discharges the cable 111 to be tested so that the cable 111 to be tested is under a preset electric field, and tests the coupled electrostatic parameters of the cable 111 to be tested under the preset electric field.
[0060] In one embodiment, the electrostatic discharge test system is used to test a plurality of cables 111, and the cables 111 to be tested may include one or more cables 111. After step S13, the electrostatic discharge test method of this embodiment further includes the following steps: when the test of a plurality of cables 111 is not completed, the cable 111 to be tested on the fixture 12 is replaced to continue testing the coupled electrostatic parameters of the next cable 111 to be tested under a preset electric field; after the test of the plurality of cables 111 is completed, the test results of the cables 111 are obtained.
[0061] Specifically, when the coupled electrostatic parameters of several bundled cables 111 are abnormal, this embodiment can locate the abnormal cable 111 by testing one or more cables 111 separately; or, when it is necessary to quantify the electrostatic noise coupled to a specific cable 111 among the bundled cables 111, this embodiment can quantify the electrostatic noise coupled to a certain cable 111 by replacing the cable 111 to be tested on the fixture 12, so as to facilitate the quantification of the electrostatic noise, electrostatic time domain and spectrum distribution, etc. coupled to a certain cable 111 when the material type and impedance of the cable 111 are different, which is beneficial to the subsequent location of electrostatic problems in the protection design of electronic equipment, systems, etc.
[0062] Among them, see Figure 6 , Figure 6 2 is a flow chart of the second embodiment of the electrostatic discharge test method provided by the present application. Figure 6 As shown, in this embodiment, the bundled cables 111 are placed on the cable placement table 11, and the cables 111 to be tested are fixed by the clamp 12 in turn, so as to perform a discharge test on the cables 111 to be tested and record the corresponding coupling electrostatic parameters. When the test of several cables 111 is not completed, that is, there are untested cables 111 in the bundled cables 111, at this time, the cable 111 to be tested on the clamp 12 is replaced to continue to discharge the next cable 111 to be tested and obtain the coupling electrostatic parameters of the next cable 111 to be tested under the preset electric field. When the test of several cables 111 is completed, that is, there are no untested cables 111 in the bundled cables 111, for example, the bundled cables 111 are all tested, or the cables 111 that need to be quantified have been tested. At this time, the test results can be obtained based on the coupling electrostatic parameters of all tested cables 111.
[0063] In one embodiment, see Figure 7 , Figure 7 FIG. 1 is a flow chart of the third embodiment of the electrostatic discharge test method provided by the present application. Figure 7 As shown, after step S13, the electrostatic discharge testing method further includes:
[0064] Step S14: When the coupling electrostatic parameter does not meet the preset requirement, the fixture 12 is connected to a filter circuit, and the filter range of the filter circuit corresponds to the waveform of the coupling electrostatic parameter.
[0065] Specifically, when the coupled electrostatic parameters do not meet the preset requirements, the filter circuit is connected between the fixture 12 and the test mechanism 14, so that the filter circuit filters and shapes the coupled electrostatic parameters of the cable 111 to be tested. The filtering range of the filter circuit corresponds to the waveform of the coupled electrostatic parameters. For example, the filtering range of the filter circuit can be adjusted based on the coupled electrostatic parameters that do not meet the preset requirements.
[0066] Step S15: Continue to test the cable 111 to be tested to obtain the rectification parameters after filtering.
[0067] Specifically, after the filter circuit is connected, the discharge test is continued on the cable 111 to be tested under the same discharge conditions to obtain the rectification parameters of the cable 111 to be tested after filtering. In a possible implementation, the rectification parameters may be the coupled electrostatic parameters of the cable 111 to be tested after filtering, or may be the rectification judgment result obtained after comparing the coupled electrostatic parameters after filtering with the preset requirements, the suppression effect on electrostatic noise, etc., which are not specifically limited here.
[0068] In one embodiment, before step S11 , the electrostatic discharge testing method of this embodiment further includes: connecting the cable 111 to an interface of the device under test.
[0069] Specifically, the electrostatic discharge test method of this embodiment can also connect the cable 111 to be tested with the interface of the test device, so as to simulate the electrostatic noise coupled by the cable 111 under the state of the test device after the test device is connected to the cable 111 to be tested, thereby realizing the test verification of the discharge of the cable 111 under the state of the test device.
[0070] It is understandable that the electrostatic discharge test method of this embodiment can be to perform an electrostatic discharge test on at least one cable 111 to be tested separately, or to connect the cable 111 to be tested to the interface of the device under test to perform an electrostatic discharge test. Furthermore, the electrostatic discharge test method of this embodiment can also connect the filter circuit to the current path of the cable 111 to be tested to achieve filtering rectification for the separate test of the cable 111; or, connect the filter circuit to the current path between the cable 111 to be tested and the device under test to achieve filtering rectification for the discharge test of the cable 111 on the device under test.
[0071] See also Figure 8 , Figure 8 Schematic diagram of the structure of an embodiment of the electronic device provided by the present application. Figure 8As shown, the electronic device 50 of this embodiment includes a memory 52 and a processor 51, and the processor 51 is connected to the memory 52. The memory 52 is used to store program instructions. The processor 51 is used to execute the program instructions stored in the memory 52 to implement the electrostatic discharge test method described in any of the above embodiments.
[0072] The processor 51 may also be referred to as a CPU (Central Processing Unit). The processor 51 may be an integrated circuit chip having the ability to process signals. The processor 51 may also be a general-purpose processor, a digital signaling processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
[0073] The memory 52 can be a memory stick, a TF card, etc., which can store all the information in the electronic device 50, including the input raw data, computer programs, intermediate operation results and final operation results are all stored in the memory. It stores and retrieves information according to the location specified by the controller. With the memory, the string matching prediction device has a memory function and can ensure normal operation. The memory of the string matching prediction device can be divided into main memory (internal memory) and auxiliary memory (external memory) according to the purpose. There is also a classification method of dividing it into external memory and internal memory. External memory is usually a magnetic medium or an optical disk, etc., which can store information for a long time. Memory refers to the storage component on the motherboard, which is used to store the data and programs currently being executed, but is only used to temporarily store programs and data. If the power is turned off or the power is cut off, the data will be lost.
[0074] In the several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the inverter control method described above is only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.
[0075] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0076] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0077] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a system server, or a network device, etc.) or a processor to execute all or part of the steps of the various implementation methods of the present application.
[0078] See also Fig. 9 , Fig. 9 Schematic diagram of the structure of an embodiment of the computer-readable storage medium provided by the present application. Fig. 9 As shown, the computer-readable storage medium of the present application stores program instructions 61 that can implement all the above methods, wherein the program instructions 61 can be stored in the above storage medium in the form of a software product, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of each implementation method of the present application. The aforementioned storage device includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes, or electronic devices such as computers, servers, mobile phones, tablets, etc.
[0079] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. An electrostatic discharge test system, characterized in that: include: A cable placement table, used to place a number of cables; At least two clamps are arranged on the cable placement table, and the cable to be tested is passed through the two clamps, and the clamps are used to relatively fix the cable to be tested; A discharge mechanism, disposed on the cable placement platform, for discharging the cables on the cable placement platform so that at least a portion of the cables are placed under a preset electric field; The testing mechanism is connected to at least one of the fixtures and is used to obtain the coupled electrostatic parameters of the cable to be tested under the preset electric field when the discharge mechanism discharges.
2. The electrostatic discharge test system according to claim 1, characterized in that: The fixture includes a first routing position and a second routing position, wherein the first routing position is used for the cable to be tested to pass through, and the second routing position is used to accommodate the remaining cables except the cable to be tested, so that the remaining cables except the cable to be tested are placed on the cable placement table.
3. The electrostatic discharge test system according to claim 2, characterized in that: The fixture includes at least one contact hole, and the cable to be tested passes through the contact hole to form the first routing position.
4. The electrostatic discharge test system according to claim 3, characterized in that: The clamp comprises a plurality of contact holes. When the clamp is arranged on the cable placement platform, the distances between the plurality of contact holes and the cable placement platform are not equal.
5. The electrostatic discharge test system according to claim 1, characterized in that: The electrostatic discharge test system further comprises a device placement platform, which is arranged at one side of the cable placement platform and connected to the cable placement platform. The device placement platform is used to place a device under test, and the device under test is connected to the cable.
6. The electrostatic discharge test system according to claim 1, characterized in that: The electrostatic discharge test system also includes a rectification box, through which the test mechanism is connected to at least one of the fixtures, and the rectification box is provided with a filter circuit, which is used to filter and shape the coupled electrostatic parameters of the cable to be tested under the preset electric field.
7. The electrostatic discharge test system according to claim 1, characterized in that: The electrostatic discharge test system includes a first fixture, a second fixture and a resistor, the resistor is arranged on the cable placement table, the first fixture and the second fixture are respectively fixed to the two ends of the cable to be tested, the first fixture is connected to the resistor, and the second fixture is connected to the test mechanism.
8. An electrostatic discharge testing method, characterized in that: Applied to the electrostatic discharge testing system according to any one of claims 1 to 7, the electrostatic discharge testing method comprises: The cable to be tested is relatively fixed by at least two clamps so as to separate the cable to be tested from other cables on the cable placement table; Discharging the cable to be tested so that the cable to be tested is under a preset electric field; The coupled electrostatic parameters of the cable to be tested under the preset electric field are tested.
9. The electrostatic discharge testing method according to claim 8, characterized in that: The electrostatic discharge test system is used to test a plurality of cables, and the cables to be tested may include one or more of the cables; After the step of testing the coupled electrostatic parameters of the cable to be tested under the preset electric field to obtain a test result, the electrostatic discharge testing method further includes: When the test of some cables is not completed, replacing the cable to be tested on the fixture to continue testing the coupled electrostatic parameters of the next cable to be tested under the preset electric field; After a number of the cable tests are completed, the test results of the cables are obtained.
10. The electrostatic discharge testing method according to claim 8, characterized in that: After the step of testing the coupled electrostatic parameters of the cable to be tested under the preset electric field, the electrostatic discharge testing method further includes: When the coupling electrostatic parameter does not meet the preset requirement, connecting the fixture to a filter circuit, the filtering range of the filter circuit corresponds to the waveform of the coupling electrostatic parameter; Continue to test the cable to be tested to obtain rectification parameters after filtering; and / or, Before the step of relatively fixing the cable to be tested by at least two clamps so that the cable to be tested is connected to the testing mechanism through the clamps, the electrostatic discharge testing method further includes: Connect the cable to the interface of the device under test.