CN1020955C - Measuring method for static induction density of electric spark workpiece - Google Patents
Measuring method for static induction density of electric spark workpiece Download PDFInfo
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- CN1020955C CN1020955C CN 90101521 CN90101521A CN1020955C CN 1020955 C CN1020955 C CN 1020955C CN 90101521 CN90101521 CN 90101521 CN 90101521 A CN90101521 A CN 90101521A CN 1020955 C CN1020955 C CN 1020955C
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- electric spark
- spark workpiece
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- sensitivity
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Abstract
The present invention relates to a method for measuring the electrostatic sensitivity of an electric blasting supply. In the present invention, the electricity of a test sample is discharged by a linear resistor and an energy storage capacitor, and voltage and current waveforms on the test sample are directly measured. The electrostatic energy consumed on the test sample is obtained by the equation of epsilon=integral between limits 0 and infinity of 1 (t). u(t)dt, and then the electrostatic sensitivity of the electric blasting supply is obtained with a conventional method. In the method, high-pressure equipment of an electrostatic spark sensitivity apparatus can be used for experimenting, and a low voltage power supply and a low pressure component can also be used for experimenting. The electrostatic sensitivity measured with the method is free from the influence of other elements in a loop, has the significance of absolute electrostatic sensitivity and can be used as the basis to judging a safety margin.
Description
The present invention relates to a kind of measuring method of static induction density of electric spark workpiece.
Carrying out at present the method for electrostatic sensitivity test both at home and abroad, is in the equivalent circuit of simulation human body electro static discharge, utilizes the electrostatic energy (1/2CV under the 50% ignition probability under the specified conditions
2 50) or electrostatic potential (V
50) as static induction density of electric spark workpiece.American army mark MIL-1-23659B(AS) regulation electric spark workpiece ESD test condition is voltage 25KV ± 500V in " design of electric initiator and evaluation ", series resistance 5000 ± 5% Ω, electric capacity 500 ± 5%Pf has also adopted this regulation in " static induction density of electric spark workpiece test method " that China electromechanics portion the 213rd is formulated.Wherein series resistance is defined as the carbonaceous synthetic solid core resistance (AH0006-79) of 5K Ω ± 5%.Because this combined resistance is non-linear under high voltage, along with voltage increases, resistance reduces, and through behind the multiple discharge, the inner generation of resistance electrical breakdown causes permanent damage.For same combined resistance, the variation of resistance causes the variation of discharge time constant, causes the dislocation of result of the test such as firing energy and time constant relation, the difference of electrostatic sensitivity when change in resistance also causes series connection combined resistance and fixed resistance.Therefore, this resistance can not be as the element in the code test circuit.
Though above-mentioned test method has been avoided many bad definite factors, generally the electric spark workpiece antistatic effect is provided evaluation from the discharge system energy, can arrange out the order of product to the static discharge sensitivity.But 50% ignition of adopting above-mentioned test method to obtain can be 1/2CV
2 50Being the gross energy that storage capacitor stores, is the gross energy that consumes in Circuits System, and it comprises the loss under high voltagehigh frequency to gas discharge and capacitor of circuit, series resistance, switch transition.It is not the real energy that consumes on the sample.Therefore, its sensitivity value of recording is a kind of relative electrostatic sensitivity.Can not be as the criterion of formulating security technology standard.And above-mentioned test method carries out under given conditions, and behind parameter change, the result that this test records has just lost and represented its antistatic effect and to the meaning of static discharge sensitivity.
Purpose of the present invention is exactly in order to overcome the problem that existing measurement of electrostatic sensitivity test method exists, a kind of method that can measure the energy of actual consumption on the electric spark workpiece sample to be provided, thereby to count the electrostatic sensitivity of this electric spark workpiece.
The method of measurement static induction density of electric spark workpiece of the present invention is the electric spark workpiece sample to be placed in the loop of static discharge measure, and determines its electrostatic sensitivity.At first in the static discharge loop, seal in linear sampling resistance (6) and high pressure low value linear resistance (7), secondly linear sampling resistance (6) two ends and electric spark workpiece sample (8) two ends are connected on respectively on the digital storage oscilloscope (9), the output of digital storage oscilloscope (9) is connected on the wave tracer (10), then when storage capacitor (5) discharges to electric spark workpiece sample (8), digital storage oscilloscope (9) is noted electric current-time graph i(t from linear sampling resistance (6) two ends), digital storage oscilloscope (9) is noted voltage-time curve u(t from electric spark workpiece sample (8) two ends simultaneously), note i(t by wave tracer (10)) curve and u(t) curve, next step is to i(t) and u(t) curve product integral, try to achieve the electrostatic energy of consumption on electric spark workpiece sample (8), i.e. ε=∫
∝ 0I(t) dt u(t) adds up the electrostatic energy of electric spark workpiece sample (8) 50% ignition points again, as the electrostatic sensitivity of this electric spark workpiece 50% ignition point.
In the measurement static induction density of electric spark workpiece method of the present invention, high pressure low value linear resistance (7) is that resistance is 10～10
4A series of resistance that the Ω order of magnitude changes, more than the withstand voltage 30KV, the linearity is better than ± and 2%, therefore, resistance does not change with the variation of voltage basically, and it cooperates with the atmosphere ball type switch, and discharge current is changed with index law.
The energy of electric spark workpiece consumption will be decided by sample (8) (bridge wire resistance), discharge time constant and bridge silk crest voltage.After the time constant was determined, discharging law was already definite, ignited the constant in energy (crest voltage is identical) of electric spark workpiece.Therefore, only constant variation in time of 50% ignition of electric spark workpiece actual consumption, the various combination of high pressure low value linear resistance (7), storage capacitor (5) does not influence this value.Can suitably adjust storage capacitor (5) and high-voltage energy storage linear resistance (7) like this, make storage capacitor (5) apply magnitude of voltage and be in the suitable scope, avoid simultaneously seeking the difficulty of various parameter sensitivity conditions for measuring electric spark workpiece absolute electrometer sensitivity.
The present invention directly measures the true energy that electric spark workpiece is consumed in static discharge, therefore, can utilize the high-tension apparatus of electrostatic spark sensibility instrument to test, and also can utilize general low-tension supply and low-voltage component to test.And the electrostatic sensitivity measured of this method is not subjected to the influence of other element in the loop, has the meaning of absolute electrometer sensitivity, can be used as the foundation that the electric spark workpiece safety margin is judged.Avoided each element difficulty that interactional uncontrollable condition is brought when electrion in the circuit.
One of embodiments of the invention will be illustrated in conjunction with the accompanying drawings.
Accompanying drawing is a measurement static induction density of electric spark workpiece method schematic diagram of the present invention.
Dotted line is the blast case among the figure.
Connect test circuit by shown in the figure, connect power supply, each one of adjusting instrument is in normal condition.At first give storage capacitor (5) charging by charging current limiter resistance (2) with DC high-voltage power supply (1), with the magnitude of voltage that is filled on electrostatic voltmeter (3) the observation storage capacitor (5), when voltage reaches a certain predetermined value, conversion ball type switch (4), storage capacitor (5) just discharges to electric spark workpiece sample (8) by high pressure low value linear resistance (7) and linear sampling resistance (6), at this moment digital storage oscilloscope (9) is noted the electric current-time graph i(t at discharge process neutral line sampling resistor (6) two ends), simultaneously, digital storage oscilloscope (9) is noted voltage-time curve u(t from electric spark workpiece sample (8) two ends), again by wave tracer with i(t) curve and u(t) curve record is on coordinate paper, then to i(t) curve and u(t) the curve product integral, try to achieve the electrostatic energy of consumption on electric spark workpiece sample (8), i.e. ε=∫
∝ 0I(t) dt u(t).
The test of electric spark workpiece sample 50% firing energy electrostatic sensitivity is undertaken by the GJB377-87 test procedure, and data are handled and pressed GJB377-87 statistics calculation program calculating 50% ignition energy ε
50With standard deviation S.
Claims (1)
- A kind of method of measuring static induction density of electric spark workpiece, it is the electric spark workpiece sample to be placed in the loop of static discharge measure, and determines its electrostatic sensitivity, it is characterized in that:A, in the static discharge loop, seal in linear sampling resistance (6) and high pressure low value linear resistance (7),B, linear sampling resistance (6) two ends and electric spark workpiece sample (8) two ends are connected on respectively on the digital storage oscilloscope (9), the output of digital storage oscilloscope (9) is connected on the wave tracer (10),When c, test, digital storage oscilloscope (9) is noted electric current one time graph i (t) from linear sampling resistance (6) two ends, simultaneously, digital storage oscilloscope (9) is noted voltage one time graph u (t) from electric spark workpiece sample (8) two ends, note i (t) curve and u (t) curve by wave tracer (10)D, to i (t) and u (t) product integral, try to achieve the electrostatic energy of consumption on electric spark workpiece sample (8),The electrostatic energy of e, statistics electric spark workpiece sample (8) 50% ignition points is as the electrostatic sensitivity of this electric spark workpiece 50% ignition point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101521 CN1020955C (en) | 1990-03-23 | 1990-03-23 | Measuring method for static induction density of electric spark workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90101521 CN1020955C (en) | 1990-03-23 | 1990-03-23 | Measuring method for static induction density of electric spark workpiece |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055054A CN1055054A (en) | 1991-10-02 |
| CN1020955C true CN1020955C (en) | 1993-05-26 |
Family
ID=4877110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90101521 Expired - Fee Related CN1020955C (en) | 1990-03-23 | 1990-03-23 | Measuring method for static induction density of electric spark workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020955C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865961A (en) * | 2010-06-18 | 2010-10-20 | 中国科学院西安光学精密机械研究所 | Testing device for electromagnetic pulse damage of electric initiating explosive device |
| CN103728487B (en) * | 2013-07-17 | 2015-01-21 | 中国人民解放军军械工程学院 | Method for metering real radio frequency detonating energy of electric initiating explosive device |
| CN105486935B (en) * | 2015-12-21 | 2019-06-11 | 国网四川省电力公司电力科学研究院 | A kind of power purchase card antistatic effect test high voltage electrostatic discharge device |
| CN109387124A (en) * | 2018-08-23 | 2019-02-26 | 邢立平 | A kind of machinery priming system stab sensitivity test method |
| CN110412375A (en) * | 2019-07-25 | 2019-11-05 | 广东顺德华认检测技术有限公司 | A method of for checking and accepting self-ballasted load cabinet |
| CN113376210A (en) * | 2021-05-28 | 2021-09-10 | 襄阳新舟自动化科技有限公司 | Electrostatic loading quick drying device |
-
1990
- 1990-03-23 CN CN 90101521 patent/CN1020955C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1055054A (en) | 1991-10-02 |
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