Electrostatic discharge immunity testing device for ungrounded equipment
The electrostatic discharge immunity test device addresses charge accumulation issues by using a discharge cable with an on-off switch and resistors to ensure accurate and safe testing of ungrounded equipment.
Patent Information
- Application Number
- CN202420072531.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-11
AI Technical Summary
Existing electrostatic discharge immunity test devices for ungrounded equipment suffer from charge accumulation, leading to rapid voltage increases and inaccurate test results due to insulation breakdown, which hinders the evaluation of true electrostatic resistance levels.
An electrostatic discharge immunity test device with a discharge cable having an on-off switch and discharge resistors, allowing controlled discharge of accumulated charges on ungrounded equipment, ensuring accurate evaluation of electrostatic resistance levels.
The device effectively prevents charge damage to ungrounded equipment by controlled discharge, improving test accuracy and enabling reliable evaluation of electrostatic resistance levels.
Smart Images
Figure CN222259476U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrostatic testing, in particular to an electrostatic discharge immunity testing device for ungrounded equipment. Background Art
[0002] In the related technology, the existing electrostatic discharge immunity test device for ungrounded equipment is prone to charge accumulation when performing electrostatic discharge immunity test on the ungrounded equipment. The charge accumulation on the ungrounded equipment will cause rapid charging of small gaps. When the gap voltage far exceeds the static breakdown voltage, the charge accumulation on the ungrounded equipment will make the voltage several times the expected test voltage. Then, the insulator capacitance of the ungrounded equipment will be charged to an abnormally high level after several electrostatic discharge accumulations. Then, the insulator capacitance will discharge at the insulation breakdown voltage with high energy, resulting in inaccurate test results and the inability to evaluate the true electrostatic resistance level of the product. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an electrostatic discharge immunity test device for ungrounded equipment, which can avoid the phenomenon of accumulated charge damaging the ungrounded equipment, thereby improving the accuracy of the test results and achieving the effect of evaluating the electrostatic resistance level of the ungrounded equipment.
[0004] According to the electrostatic discharge immunity testing device for an ungrounded device of an embodiment of the utility model, the ungrounded device is suitable for being placed on an insulating support, and the electrostatic discharge immunity testing device comprises: an electrostatic discharge generator, which is suitable for discharging static electricity to the ungrounded device; a discharge cable, which has a first connection end and a second connection end, the first connection end is suitable for being connected to the ungrounded device, and the second connection end is suitable for being grounded, and the discharge cable has an on-off switch, which is used to turn on or off the discharge cable.
[0005] According to the electrostatic discharge immunity test device for an ungrounded device in an embodiment of the utility model, a discharge cable connected to the ungrounded device is provided in the electrostatic discharge immunity test device, and the discharge cable has an on-off switch for turning on or off the discharge cable. When the on-off switch is turned on or off, the discharge cable can discharge the charge accumulated on the ungrounded device, thereby avoiding the phenomenon of accumulated charge damaging the ungrounded device, thereby improving the accuracy of the test result and achieving the effect of evaluating the electrostatic resistance level of the ungrounded device.
[0006] According to some embodiments of the present invention, the discharge cable further has a plurality of discharge resistors, and the on-off switch and the plurality of discharge resistors are connected in series to the discharge cable.
[0007] According to some embodiments of the present invention, the plurality of discharge resistors have an end resistor close to the first connection end, and the on-off switch is located between the end resistor and the ungrounded device.
[0008] According to some embodiments of the present invention, the spacing distance between the end resistor and the first connection end is D1, which satisfies the relationship: 0mm<D1≤20mm.
[0009] According to some embodiments of the present invention, the spacing distance between two adjacent bleeder resistors among the plurality of bleeder resistors is the same.
[0010] According to some embodiments of the present invention, the resistance of the discharge resistor is 470 kΩ.
[0011] According to some embodiments of the utility model, when the electrostatic discharge generator discharges static electricity to the ungrounded device, the on-off switch is in an open state; when the electrostatic discharge generator completes the discharge, the on-off switch is in a closed state.
[0012] According to some embodiments of the utility model, the electrostatic discharge generator discharges static electricity to the ungrounded device for a time period of T1 each time, and the on-off switch is closed for a time period of T2 each time, satisfying the relationship: T1≤T2.
[0013] According to some embodiments of the present invention, the on-off switch is disconnected for a period of time T3 each time, satisfying the relationship: T1 = T3.
[0014] According to some embodiments of the present invention, the on-off switch is configured as a timing switch.
[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0017] Figure 1 This is a connection diagram of a first embodiment of an electrostatic discharge immunity test device according to an embodiment of the utility model;
[0018] Figure 2 This is a connection diagram of a second embodiment of the electrostatic discharge immunity test device of the utility model;
[0019] Figure 3 A schematic diagram of the connection of the discharge cable in an embodiment of the utility model.
[0020] Reference numerals:
[0021] Electrostatic discharge immunity testing device 100;
[0022] Electrostatic discharge generator 10; insulating support 20; discharge cable 30; first connection end 31; second connection end 32; on-off switch 33; discharge resistor 34; end resistor 35;
[0023] Ungrounded device 200. DETAILED DESCRIPTION
[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0025] Reference below Figure 1-Figure 3 The electrostatic discharge immunity test device 100 of the ungrounded device 200 according to the embodiment of the utility model is described. The ungrounded device 200 may include an insulating support 20. The ungrounded device 200 is suitable for being placed on the insulating support 20. The ungrounded device 200 may be a television, a mobile phone, or other equipment. Figure 1 As shown, the insulating support 20 may be an insulating table, and the ungrounded device 200 is placed on the insulating table. Figure 2 As shown, the insulating support member 20 may be an insulating plate, and the ungrounded device 200 is placed on the insulating plate.
[0026] like Figure 1 and Figure 2 As shown, the electrostatic discharge immunity testing device 100 according to the embodiment of the utility model includes: an electrostatic discharge generator 10, which is suitable for discharging static electricity to an ungrounded device 200; a discharge cable 30, which has a first connection end 31 and a second connection end 32, the first connection end 31 is suitable for connecting to the ungrounded device 200, and the second connection end 32 is suitable for grounding, and the discharge cable 30 has an on-off switch 33, which is used to turn on or off the discharge cable 30.
[0027] Among them, the ungrounded device 200 is suitable for being placed on the insulating support 20, for example: the insulating support 20 can be an insulating pad, an insulating mounting frame, etc., but the utility model is not limited thereto, and the insulating support 20 can also be other types of supports, as long as the insulating support 20 can play an insulating role. Therefore, the ungrounded device 200 is placed on the insulating support 20, and the device under test can be ungrounded. The electrostatic discharge generator 10 can be a device such as an electrostatic gun, and the electrostatic discharge generator 10 is suitable for discharging static electricity to the ungrounded device 200. Specifically, the electrostatic discharge generator 10 and the ungrounded device 200 can be plugged and connected. When the electrostatic discharge generator 10 and the ungrounded device 200 are connected, the electrostatic discharge generator 10 can discharge static electricity to the ungrounded device 200. It can be explained that the size of the static electricity discharged by the electrostatic discharge generator 10 to the ungrounded device 200 can be set and adjusted according to the different ungrounded devices 200 tested, so as to ensure the accuracy of the test results.
[0028] The discharge cable 30 can connect the ungrounded device 200 to the earth. Specifically, the discharge cable 30 may have a first connection end 31 and a second connection end 32. The first connection end 31 is suitable for connecting to the ungrounded device 200, and the second connection end 32 is suitable for grounding. The discharge cable 30 also has an on-off switch 33. The on-off switch 33 is located between the first connection end 31 and the second connection end 32. The on-off switch 33 is used to turn on or off the discharge cable 30. Specifically, when the electrostatic discharge generator 10 discharges static electricity to the ungrounded device 200, the on-off switch 33 is disconnected to ensure that the ungrounded device 200 is not grounded. When the electrostatic discharge generator 10 has finished discharging static electricity to the ungrounded device 200, the on-off switch 33 is closed to ground the ungrounded device 200 to discharge the charge, thereby discharging the charge on the ungrounded device 200, avoiding the phenomenon of accumulated charge damaging the ungrounded device 200, and thus improving the accuracy of the test results. This cycle is repeated many times, and the effect of evaluating the electrostatic resistance level of the ungrounded device 200 can be achieved.
[0029] According to the electrostatic discharge immunity test device 100 of the embodiment of the utility model, a discharge cable 30 connected to the ungrounded device 200 is provided in the electrostatic discharge immunity test device 100, and the discharge cable 30 has an on-off switch 33 for turning on or off the discharge cable 30. When the electrostatic discharge generator 10 discharges static electricity to the ungrounded device 200, the on-off switch 33 is disconnected to ensure that the ungrounded device 200 is not grounded. After the electrostatic discharge generator 10 finishes discharging static electricity to the ungrounded device 200, the on-off switch 33 is closed to allow the discharge cable 30 to discharge the accumulated charge on the ungrounded device 200, thereby avoiding the phenomenon that the accumulated charge damages the ungrounded device 200, thereby improving the accuracy of the test result. By repeating this cycle multiple times, the effect of evaluating the electrostatic resistance level of the ungrounded device 200 can be achieved.
[0030] According to some embodiments of the present invention, Figure 3 As shown, the discharge cable 30 may also have a plurality of discharge resistors 34, for example, the discharge cable 30 may have two, three, four, etc. discharge resistors 34, but the present invention is not limited thereto, and the discharge cable 30 may also have other numbers of discharge resistors 34, as long as the discharge cable 30 has a plurality of discharge resistors 34. The on-off switch 33 and the plurality of discharge resistors 34 may be connected in series to the discharge cable 30. With such a configuration, the components on the discharge cable 30 are simply connected, the connection complexity of the electrostatic discharge immunity test device 100 can be reduced, the accuracy of the test results can be improved, and the discharge performance of the discharge cable 30 can be improved.
[0031] According to some embodiments of the present invention, Figure 3 As shown, the plurality of discharge resistors 34 may have an end resistor 35 close to the first connection terminal 31, and the on-off switch 33 may be located between the end resistor 35 and the ungrounded device 200. Such a configuration can improve the accuracy of the electrostatic discharge immunity testing device 100, thereby improving the accuracy of the test results.
[0032] According to some embodiments of the present invention, Figure 3 As shown, the spacing distance between the end resistor 35 and the first connection end 31 is D1, which satisfies the relationship: 0mm<D1≤20mm, that is, the spacing distance D1 between the end resistor 35 and the first connection end 31 can be any value between 0mm-20mm, for example: the spacing distance D1 between the end resistor 35 and the first connection end 31 can be 1mm, 2mm, 2.1mm, 5mm, 12mm, 18mm, 20mm and other values, but the utility model is not limited thereto, the spacing distance D1 between the end resistor 35 and the first connection end 31 can also be other values between 0mm-20mm, as long as the spacing distance D1 between the end resistor 35 and the first connection end 31 is a value between 0mm-20mm. When the spacing distance between the end resistor 35 and the first connection end 31 is less than or equal to 20mm, after the on-off switch 33 is closed, it is beneficial to quickly discharge the charge on the ungrounded device 200, which can improve the test accuracy of the electrostatic discharge immunity test device 100, thereby improving the accuracy of the test results.
[0033] According to some embodiments of the present invention, Figure 3As shown, the spacing distance between two adjacent bleeder resistors 34 in the plurality of bleeder resistors 34 can be the same. This setting can improve the test accuracy of the electrostatic discharge immunity test device 100, thereby improving the accuracy of the test results. It can be explained that the value of the spacing distance between two adjacent bleeder resistors 34 in the plurality of bleeder resistors 34 can be set and adjusted according to different situations.
[0034] According to some embodiments of the present invention, Figure 3 As shown, the resistance of the discharge resistor 34 can be 470 kΩ. With this configuration, the discharge cable 30 can discharge the charge on the ungrounded device 200 in a short time, thereby reducing the time of the electrostatic discharge immunity test of the ungrounded device 200, thereby improving the test efficiency of the electrostatic discharge immunity test device 100.
[0035] According to some embodiments of the utility model, when the electrostatic discharge generator 10 discharges static electricity to the ungrounded device 200, the on-off switch 33 is in the off state so that the ungrounded device 200 can be ungrounded, thereby realizing the electrostatic discharge immunity test of the ungrounded device 200. When the electrostatic discharge generator 10 completes the discharge, the on-off switch 33 is in the closed state so that the ungrounded device 200 can be grounded, thereby discharging the charge on the ungrounded device 200, avoiding the phenomenon of accumulated charge damaging the ungrounded device 200, thereby improving the accuracy of the test results. By repeating this cycle multiple times, the effect of evaluating the electrostatic resistance level of the ungrounded device 200 can be achieved.
[0036] According to some embodiments of the present invention, the time for the electrostatic discharge generator 10 to discharge static electricity to the ungrounded device 200 each time can be T1, and the time for the on-off switch 33 to be closed each time is T2, satisfying the relationship: T1≤T2. This setting can ensure that the time for the electrostatic discharge generator 10 to discharge static electricity to the ungrounded device 200 each time is shorter than the time for the discharge cable 30 to discharge the charge each time, thereby ensuring that after the electrostatic discharge generator 10 finishes discharging static electricity to the ungrounded device 200 each time, the charge on the ungrounded device 200 can be discharged cleanly, thereby avoiding the accumulation of charge on the ungrounded device 200, thereby improving the accuracy of the test results, achieving the effect of evaluating the electrostatic resistance level of the ungrounded device 200, and reducing the risk of damage to the ungrounded device 200.
[0037] Specifically, the test time can be 2 seconds, for example: at 0-1 second, the electrostatic discharge generator 10 discharges static electricity to the ungrounded device 200, and the on-off switch 33 is disconnected during the process of the electrostatic discharge generator 10 discharging static electricity to the ungrounded device 200. After the electrostatic discharge generator 10 finishes discharging static electricity to the ungrounded device 200, at 1-2 seconds, the on-off switch 33 is closed to allow the discharge cable 30 to discharge the charge on the ungrounded device 200.
[0038] At 2-3 seconds, the electrostatic discharge generator 10 discharges static electricity to the ungrounded device 200 again, and the on-off switch 33 is disconnected during the process of the electrostatic discharge generator 10 discharging static electricity to the ungrounded device 200. After the electrostatic discharge generator 10 finishes discharging static electricity to the ungrounded device 200, at 3-4 seconds, the on-off switch 33 is closed to allow the discharge cable 30 to discharge the charge on the ungrounded device 200. This cycle is repeated many times, and the effect of evaluating the static resistance level of the ungrounded device 200 can be achieved.
[0039] It can be explained that the time interval between multiple consecutive discharges is recommended to be at least one second, thereby reducing the risk of damage to the electrostatic discharge immunity testing device 100 and thereby increasing the service life of the electrostatic discharge immunity testing device 100 .
[0040] According to some embodiments of the present invention, the on-off switch 33 is disconnected for a time period of T3 each time, satisfying the relationship: T1=T3. This arrangement can ensure that each time the electrostatic discharge generator 10 discharges static electricity to the ungrounded device 200, the discharged static electricity will not be discharged, thereby ensuring the accuracy of the test results.
[0041] According to some embodiments of the utility model, the on-off switch 33 can be constructed as a timing switch. The use of the timing switch can set the closing time and the opening time of the on-off switch 33 before testing, thereby reducing the tediousness of the tester's operation during the test process, avoiding tester errors, and thus improving the accuracy of the test results.
[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0043] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. An electrostatic discharge immunity test device for ungrounded equipment, characterized in that: The ungrounded device is suitable for being placed on an insulating support, and the electrostatic discharge immunity testing device comprises: an electrostatic discharge generator, the electrostatic discharge generator being adapted to discharge static electricity to the ungrounded device; A discharge cable, wherein the discharge cable has a first connection end and a second connection end, wherein the first connection end is suitable for being connected to the ungrounded device, and the second connection end is suitable for being grounded, and the discharge cable has an on-off switch, and the on-off switch is used to turn on or off the discharge cable.
2. The electrostatic discharge immunity test device for ungrounded equipment according to claim 1, characterized in that: The discharge cable also has a plurality of discharge resistors, and the on-off switch and the plurality of discharge resistors are connected in series to the discharge cable.
3. The electrostatic discharge immunity test device for ungrounded equipment according to claim 2, characterized in that: The plurality of discharge resistors have an end resistor close to the first connection end, and the on-off switch is located between the end resistor and the ungrounded device.
4. The electrostatic discharge immunity test device for ungrounded equipment according to claim 3, characterized in that: The distance between the end resistor and the first connection end is D1, which satisfies the relationship: 0mm<D1≤20mm.
5. The electrostatic discharge immunity test device for ungrounded equipment according to claim 2, characterized in that: The spacing distance between two adjacent discharge resistors in the plurality of discharge resistors is the same.
6. The electrostatic discharge immunity test device for ungrounded equipment according to claim 2, characterized in that: The resistance of the discharge resistor is 470 kΩ.
7. The electrostatic discharge immunity test device for ungrounded equipment according to claim 1, characterized in that: When the electrostatic discharge generator discharges static electricity to the ungrounded device, the on-off switch is in an open state; when the electrostatic discharge generator completes the discharge, the on-off switch is in a closed state.
8. The electrostatic discharge immunity test device for ungrounded equipment according to claim 7, characterized in that: The electrostatic discharge generator discharges static electricity to the ungrounded device for a time period of T1 each time, and the on-off switch is closed for a time period of T2 each time, satisfying the relationship: T1≤T2.
9. The electrostatic discharge immunity test device for ungrounded equipment according to claim 8, characterized in that: The on-off switch is disconnected for a period of time T3 each time, satisfying the relationship: T1 = T3.
10. The electrostatic discharge immunity test device for ungrounded equipment according to any one of claims 1 to 9, characterized in that: The on-off switch is configured as a timing switch.