微喷射物质作用下脉冲信号电探针的放电机理

文雪峰; 王健; 王晓燕; 胡杨; 陈永涛

doi:10.11883/1001-1455(2017)05-0887-06

微喷射物质作用下脉冲信号电探针的放电机理

doi: 10.11883/1001-1455(2017)05-0887-06

中国工程物理研究院流体物理研究所，四川绵阳 621999

基金项目:

国家自然科学基金项目 11502253

中国工程物理研究院科学技术发展基金项目 2015B0201002

详细信息

作者简介:
文雪峰(1988-)，男，硕士，助理研究员

通讯作者:
王健，wj19660606@sina.cn

中图分类号: O384
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- 被引次数: 0
出版历程
- 收稿日期: 2016-03-09
- 修回日期: 2016-05-30
- 刊出日期: 2017-09-25

Discharging mechanism of pulse signal electric probe conducted by micro-jetting

Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China

摘要

摘要: 针对脉冲信号电探针在微喷射物质作用下出现的“非正常”放电现象，提出了微喷射物质K+R_x等效电路模型，用以解释微喷射物质导通电探针放电机理。开展爆轰实验，联合X射线测试技术，确定了电探针放电区域处于微喷射区与微层裂区的过渡地带，并发现电探针的3类“非正常”放电现象。建立电路仿真模型，将微喷射物质等效成K+R_x电路，调节K+R_x等效电路模型参数，模拟电探针的3类“非正常”放电现象。仿真结果表明，K+R_x等效电路模型很好地解释了微喷射物质作用下脉冲信号电探针的放电机理。
- 信息处理技术 /
- 微喷射 /
- 电探针 /
- 电路仿真 /
- 放电
Abstract: For the "abnormal discharge" phenomenon of the pulse signal electric probe due to the micro-jetting, we proposed a K+R_x equivalent circuit model of the micro-jetting and conducted the explosive loading experiments to explain the discharging mechanism of the electric probe conducted by the micro-jetting. According to the X-ray testing data, the discharging position of the electric probe obtained was in the transition zone from the micro-jetting to the micro-spall, and the abnormal discharge phenomena of the electric probe were classified into three types. Thus we proposed a circuit simulation model where the micro-jetting is equivalent to a K+R_x circuit. By adjusting the parameters of the K+R_x equivalent circuit model, the three types of the "abnormal discharging" phenomena of the electric probe were simulated. The simulation results show that the K+R_x equivalent circuit model provides an excellent explanation for the discharging of the pulse signal electric probe conducted by the micro-jetting.
- information processing technology /
- micro-jetting /
- electric probe /
- circuit simulation /
- discharge

HTML全文

图 1 金属样品表面状态

Figure 1. Surface conditions of the metal samples

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图 2 爆轰加载实验装置

Figure 2. Explosive loading experiment setup

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图 3 通过X射线图像反演得到的相对密度分布

Figure 3. Relative density obtained by X-ray photograph inversion

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图 4 电探针放电波形

Figure 4. Discharging waveforms of the electric probe

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图 5 电探针测试电路

Figure 5. Test circuit of the electric probe

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图 6 K+R_x等效电路模型

Figure 6. K+R_x equivalent circuit model

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图 7 电探针测试系统仿真电路

Figure 7. Simulation circuit of the electric probe measuring system

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图 8 放电现象仿真结果

Figure 8. Simulation results of the discharge phenomena

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表 1 电探针信号起跳时间

Table 1. Jump time of electric probe signal

D/mm	第1圈(r=4.0mm)		第2圈(r=7.5mm)		第3圈(r=11.0mm)
D/mm	测点数	平均起跳时间/μs	测点数	平均起跳时间/μs	测点数	平均起跳时间/μs
25	2	13.45	2	13.60	2	12.12
30	4	16.15	2	16.15	2	16.80
35	2	18.62	4	18.83	4	18.12
40	2	21.14	2	21.70	2	22.10

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