不同静电环境电爆管安全性
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摘要
为评估某电爆管不同静电环境的安全性,采用静电放电模拟器分别模拟人体,机器以及人体-金属复合放电情形,在25 k V条件下对其脚-脚和脚-壳两种静电放电方式的安全性进行了研究。实验发现:脚-脚放电引起的电爆管桥丝电阻值减小率小于2.1%,40发试样均未发火;脚-壳放电时,机器模型放电功率理论计算值高达104.17 MW,导致10发试样中的6发发火。分析表明:该电爆管的静电安全性主要取决于静电放电的电流和功率大小,压敏电阻发生开路失效是导致其发火的主要原因。
In order to assess the safety of a electric squib in different electrostatic dischargeOESD 1 environments%Human-Body model OHBM 1%Body-Machine modelOBMM 1 and Machine modelOMM 1 were used to study the safety of the electric squib using two discharge ways of pin-pin and pin-shell with 25 kV discharge voltage.Results show that the decrease of bridge wire resistance is less than2.1%when ESD is applied to pin-pin%and none of the 40 electric squib samples is ignited.The calculated discharge power of MM model is 104.17 M W%and 6 of 10 samples are ignited when ESD is applied to pin-shell.The analysis indicates that the safety of electric squib in different ESD models is determined by the power and the electric current of ESD%and the open circuit of varistor is the main reason for electric squib samples igniting.
In order to assess the safety of a electric squib in different electrostatic dischargeOESD 1 environments%Human-Body model OHBM 1%Body-Machine modelOBMM 1 and Machine modelOMM 1 were used to study the safety of the electric squib using two discharge ways of pin-pin and pin-shell with 25 kV discharge voltage.Results show that the decrease of bridge wire resistance is less than2.1%when ESD is applied to pin-pin%and none of the 40 electric squib samples is ignited.The calculated discharge power of MM model is 104.17 M W%and 6 of 10 samples are ignited when ESD is applied to pin-shell.The analysis indicates that the safety of electric squib in different ESD models is determined by the power and the electric current of ESD%and the open circuit of varistor is the main reason for electric squib samples igniting.
引文
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[3]Asay B W.Shock wave science and technology reference library,V ol.5:N on-shock initiation of explosives[M].Springer H eidelberg D ordrecht London N ew York,2009:595-596.
[4]刘尚合,魏光辉,刘直承,等.静电理论与防护[M].北京:兵器工业出版社,1999:185-194.LIU Shang-he,W EI G uang-hui,LIU Z hi-cheng,et al.T heory and protection of ESD[M].Beijing:W eapon industry publishing com pany,1999:185-194.
[5]魏光辉,国海广,孙永卫.电火工品静电安全性评价方法研究[J].火工品,2005(2):21-24.W EI G uang-hui,G U O H ai-guang,SU N Yong-w ei.Research on the evaluation m ethod of electrostatic safety for electric explosive device[J].Initiators&Pyrotechnics.2005(2):21-24.
[6]M ichael J W.Projected response of typical detonators to electrostatic discharge(ESD)environm ents[R].U C RL-ID-145642.2002.
[7]Fisher R J.A severe human model for safety and high reliability system qualification testing in sandia national laboratories[R].SAN D-89-0194C.1989.
[8]M IL-ST D-331C.Fuze and fuze components,environmental and perform ance tests for[S],2005.
[9]蔡瑞娇.火工品设计原理[M].北京:北京理工大学出版社,1999:219-224.C AI Rui-jiao.D esign principle of detonators[M].Beijing:BIT press,1999:219-224.
[10]白瑞祥,严楠.静电放电对电火工品桥丝影响的实验研究[J].火工品,2012(3):9-12.BAI Rui-xiang,YAN N an.Experim ental study on the effect of ESD on EED bridgew ire[J].Initiators&Pyrotechnics,2012(3):9-12.