CN102955102A - Electrostatic discharge noise immunity test device - Google Patents
Electrostatic discharge noise immunity test device Download PDFInfo
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- CN102955102A CN102955102A CN 201110236541 CN201110236541A CN102955102A CN 102955102 A CN102955102 A CN 102955102A CN 201110236541 CN201110236541 CN 201110236541 CN 201110236541 A CN201110236541 A CN 201110236541A CN 102955102 A CN102955102 A CN 102955102A
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Abstract
The invention relates to an electrostatic discharge noise immunity test device comprising a discharge gun comprising a charging resistor, a single-pole double-throw high-voltage relay, an RC (resistance current) circuit and a discharge gun head. Two ends of a normally closed terminal of the single-pole double-throw high-voltage relay are respectively connected with the charge resistor and the RC circuit, the two ends of the normally closed terminal are in short circuit, and a normally opened terminal of the single-pole double-throw high-voltage relay is connected with the discharge gun head. The electrostatic discharge noise immunity test device further comprises a current detection circuit and a control circuit, an input end of the current detection circuit is connected with the RC circuit, and an output end of the current detection circuit is connected with the control circuit. An output end of the control circuit is connected with the single-pole double-throw high-voltage relay. Compared with the prior art, the electrostatic discharge noise immunity test device can guarantee retention time of electrostatic voltage to be not lower than 5 seconds, and is good in test repeatability and comparability.
Description
Technical field
The present invention relates to a kind of electromagnetic compatibility testing device, especially relate to a kind of esd immunity test unit.
Background technology
When doing the esd immunity test, if tested device is to do insulation usefulness, then to adopt bubble-discharge to test.The method of bubble-discharge is that the rifle that will discharge is first removed from the test product surface before each discharge, and then the rifle that will discharge is slowly near test product, until discharge occurs.In the close process of test product of existing discharge rifle, the retention time that electrostatic potential is not less than 5S does not guarantee, cause the effect of ESD test to be subjected to sparking electrode near the rate of tested device, the ratio regular meeting that the loss of electric charge, trial voltage descend is different, so the repeatability of test findings and comparability are all poor.
Summary of the invention
Purpose of the present invention is exactly to provide in order to overcome the defective that above-mentioned prior art exists to guarantee that the electrostatic potential retention time is not less than 5S, and test repeatability and comparability be the esd immunity test unit preferably.
Purpose of the present invention can be achieved through the following technical solutions: a kind of esd immunity test unit, comprise the discharge rifle, this discharge rifle comprises a charging resistor, the single-pole double-throw (SPDT) high-voltage relay, RC circuit and discharge rifle head, the two-terminal of the normal-closed end of described single-pole double-throw (SPDT) high-voltage relay connects respectively charging resistor and RC circuit, short circuit between two normal-closed end terminals, single-pole double-throw (SPDT) high-voltage relay Chang Kaiduan connects discharge rifle head, it is characterized in that, described test unit also comprises current detection circuit and control circuit, the input end of current detection circuit connects the RC circuit, output terminal connects control circuit, and described control circuit output terminal connects the single-pole double-throw (SPDT) high-voltage relay.
Described current detection circuit comprises magnet ring, transformer and rectifier bridge, and described magnet ring connects the RC circuit, and the input end of described transformer connects magnet ring, and output terminal connects rectifier bridge, and the output terminal of this rectifier bridge connects control circuit.
Described control circuit comprises trigger and single-chip microcomputer, and the input end of described trigger connects current detection circuit, and output terminal connects respectively single-chip microcomputer and single-pole double-throw (SPDT) high-voltage relay, and the output terminal of described single-chip microcomputer connects the reset terminal of trigger.
The external diameter of described magnet ring is 10mm, and internal diameter is 5mm, and thickness is 3mm, is wound with the copper wire of 10 astragals footpath 1mm on the magnet ring.
Described transformer is the isolating transformer of 220V/9V.
Described trigger is SN74HC74N.
Compared with prior art, the present invention is when bubble-discharge, and trial voltage can not be subjected to sparking electrode near the impact of the speed of tested device, can guarantee that the electrostatic potential retention time is not less than 5S, and the repeatability of experimental result and comparability are improved greatly.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, a kind of esd immunity test unit, comprise the discharge rifle, current detection circuit and control circuit, the discharge rifle comprises a charging resistor 1, single-pole double-throw (SPDT) high-voltage relay 2, RC circuit 4 and discharge rifle head 3, current detection circuit comprises magnet ring 5, transformer 6 and rectifier bridge 7, magnet ring 5 external diameters are 10mm, internal diameter is 5mm, thickness is 3mm, be wound with the copper wire of 10 astragals footpath 1mm on the magnet ring, transformer 6 is the isolating transformer of 220V/9V, control circuit comprises trigger 8 and single-chip microcomputer 9, and the two-terminal of single-pole double-throw (SPDT) high-voltage relay 2 normal-closed ends connects respectively short circuit between charging resistor 1 and 4, two normal-closed end terminals of RC circuit, make it be in conducting state, single-pole double-throw (SPDT) high-voltage relay 2 Chang Kaiduan connect discharge rifle head 3 always.RC circuit 4 connects magnet ring 5, detects discharge current by magnet ring 5.Transformer 6 input ends connect magnet ring 5, and output terminal connects rectifier bridge 7, and the output terminal of this rectifier bridge 7 connects the trigger 8 in the control circuit.The output terminal of trigger 8 connects respectively single-pole double-throw (SPDT) high-voltage relay 2 and single-chip microcomputer 9, is used for the break-make of control single-pole double-throw (SPDT) high-voltage relay 2, and transmits signal to single-chip microcomputer 9, and single-chip microcomputer 9 output terminals connect the reset terminal of trigger 8.Trigger 8 is SN74HC74N, and set termination 5V allows it be high level always, and reset terminal also meets 5V, at this moment is output as high level; When there being rising edge to come then, single-chip microcomputer 9 is the reset terminal zero clearing low level, and at this moment output terminal is low level.
Before beginning discharge, give the RC circuit 4 chargings always, make its voltage remain on the high pressure of setting always, press the trigger of discharge rifle, the Chang Kaiduan of single-pole double-throw (SPDT) high-voltage relay 2 is closed, if discharge does not occur, then single-pole double-throw (SPDT) high-voltage relay 2 is always closed, and high pressure one is passed to the rifle head straight through charging resistor 1; If discharge occurs, in the loop of electric current rifle inside, discharge current will be arranged.Detect discharge current by magnet ring 5, in case detected discharge current, arrive trigger 8 by pulse of processing generation of transformer 6 and rectifier bridge 7.When trigger 8 detects a rising edge, then export a high level signal control single-pole double-throw (SPDT) high-voltage relay 2 and disconnect high pressure, stop discharge, simultaneously this high level signal is delivered to single-chip microcomputer 9, so that single-chip microcomputer 9 record dpdt double-pole double-throw (DPDT) high-voltage relay 2 states and send the zero clearing order to the reset terminal of trigger 8, make trigger 8 reset terminal zero clearings, and output low level.
Claims (6)
1. esd immunity test unit, comprise the discharge rifle, this discharge rifle comprises a charging resistor, the single-pole double-throw (SPDT) high-voltage relay, RC circuit and discharge rifle head, the two-terminal of the normal-closed end of described single-pole double-throw (SPDT) high-voltage relay connects respectively charging resistor and RC circuit, short circuit between two normal-closed end terminals, single-pole double-throw (SPDT) high-voltage relay Chang Kaiduan connects discharge rifle head, it is characterized in that, described test unit also comprises current detection circuit and control circuit, the input end of current detection circuit connects the RC circuit, output terminal connects control circuit, and described control circuit output terminal connects the single-pole double-throw (SPDT) high-voltage relay.
2. a kind of esd immunity test unit according to claim 1, it is characterized in that, described current detection circuit comprises magnet ring, transformer and rectifier bridge, described magnet ring connects the RC circuit, the input end of described transformer connects magnet ring, output terminal connects rectifier bridge, and the output terminal of this rectifier bridge connects control circuit.
3. a kind of esd immunity test unit according to claim 1 and 2, it is characterized in that, described control circuit comprises trigger and single-chip microcomputer, the input end of described trigger connects current detection circuit, output terminal connects respectively single-chip microcomputer and single-pole double-throw (SPDT) high-voltage relay, and the output terminal of described single-chip microcomputer connects the reset terminal of trigger.
4. a kind of esd immunity test unit according to claim 2 is characterized in that, the external diameter of described magnet ring is 10mm, and internal diameter is 5mm, and thickness is 3mm, is wound with the copper wire of 10 astragals footpath 1mm on the magnet ring.
5. a kind of esd immunity test unit according to claim 2 is characterized in that, described transformer is the isolating transformer of 220V/9V.
6. a kind of esd immunity test unit according to claim 3 is characterized in that, described trigger is SN74HC74N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110236541 CN102955102A (en) | 2011-08-17 | 2011-08-17 | Electrostatic discharge noise immunity test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110236541 CN102955102A (en) | 2011-08-17 | 2011-08-17 | Electrostatic discharge noise immunity test device |
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| Publication Number | Publication Date |
|---|---|
| CN102955102A true CN102955102A (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110236541 Pending CN102955102A (en) | 2011-08-17 | 2011-08-17 | Electrostatic discharge noise immunity test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569642A (en) * | 2013-10-22 | 2015-04-29 | 鸿富锦精密电子(天津)有限公司 | electrostatic discharge immunity testing device |
| CN104678195A (en) * | 2013-11-26 | 2015-06-03 | 上海普锐马电子有限公司 | Electrostatic discharge detecting circuit |
| CN105785182A (en) * | 2016-03-18 | 2016-07-20 | 合肥联宝信息技术有限公司 | Static immunity diagnosis device and method |
| CN109932579A (en) * | 2017-12-16 | 2019-06-25 | 神讯电脑(昆山)有限公司 | Esd immunity detection device |
| CN113484703A (en) * | 2021-06-25 | 2021-10-08 | 成都飞机工业（集团）有限责任公司 | Air type electrostatic discharge test method and test equipment |
| CN114200371A (en) * | 2021-08-09 | 2022-03-18 | 威凯检测技术有限公司 | A ability verification device for electrostatic discharge immunity is experimental |
-
2011
- 2011-08-17 CN CN 201110236541 patent/CN102955102A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104569642A (en) * | 2013-10-22 | 2015-04-29 | 鸿富锦精密电子(天津)有限公司 | electrostatic discharge immunity testing device |
| CN104678195A (en) * | 2013-11-26 | 2015-06-03 | 上海普锐马电子有限公司 | Electrostatic discharge detecting circuit |
| CN105785182A (en) * | 2016-03-18 | 2016-07-20 | 合肥联宝信息技术有限公司 | Static immunity diagnosis device and method |
| CN109932579A (en) * | 2017-12-16 | 2019-06-25 | 神讯电脑(昆山)有限公司 | Esd immunity detection device |
| CN113484703A (en) * | 2021-06-25 | 2021-10-08 | 成都飞机工业（集团）有限责任公司 | Air type electrostatic discharge test method and test equipment |
| CN113484703B (en) * | 2021-06-25 | 2022-08-12 | 成都飞机工业（集团）有限责任公司 | Air type electrostatic discharge test method and test equipment |
| CN114200371A (en) * | 2021-08-09 | 2022-03-18 | 威凯检测技术有限公司 | A ability verification device for electrostatic discharge immunity is experimental |
| CN114200371B (en) * | 2021-08-09 | 2023-07-11 | 威凯检测技术有限公司 | Capability verification device for electrostatic discharge immunity test |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130306 |