| 廖 路,张勇斌,戴 越.基于极间分压检测的 VHF-EDM 放电
状态检测系统设计[J].电子测量与仪器学报,2022,36(12):117-125 |
| 基于极间分压检测的 VHF-EDM 放电
状态检测系统设计 |
| Design of VHF-EDM discharge state detection system basedon inter-electrode partial pressure detection |
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| DOI： |
| 中文关键词: 极间分压检测 甚高频脉冲 谐振频率 双极性 放电状态 |
| 英文关键词:electrode partial pressure detection VHF pulse resonant frequency dual polarity discharge status |
| 基金项目:国防科工局国防基础科研计划项目(JCKY2018212C015)、四川省科技厅重点研发项目(2021YFG0374)资助 |
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| 中文摘要: |
| 针对甚高频脉冲谐振频率随回路阻抗变化而迁移导致脉冲电压幅值变化及甚高频脉冲双极性特点导致传统检测方法
无法适用的问题,提出了基于极间分压检测的甚高频 EDM 放电状态检测方式。 利用分压、整流、滤波多模块共同作用实现对极
间高频高压双极性脉冲到低压单极性直流信号的转换,同时通过检测直流信号则可以直接表征出当前开路电压大小及极间放
电状态的变化。 在仿真及实验验证检测方法可行性的基础上,设计出基于该检测方案的放电状态检测系统及相应检测算法,成
功验证了甚高频微纳电加工所需的脉冲频率自动寻优技术及甚高频放电状态检测的有效性,有利于提升甚高频电火花加工过
程中放电状态检测精度。 |
| 英文摘要: |
| In view of the problem that the amplitude of pulse voltage changes due to the migration of VHF pulse resonance frequency with
the change of circuit impedance, and the bipolar characteristics of VHF pulse make the traditional detection method unsuitable, a VHF
EDM discharge state detection method based on inter-electrode partial voltage detection was proposed. The conversion of high frequency
and high voltage bipolar pulse to low voltage and single polarity DC signal is realized by the combined action of voltage division, rectifier
and filter modules. Meanwhile, the current open-circuit voltage and the change of inter-electrode discharge state can be directly
characterized by the detection of DC signal. In the simulation and experimental validation testing method on the basis of feasibility,
design discharge condition detection system based on the test scheme and corresponding detection algorithms, successfully verified the
micro-nano machining the pulse frequency, VHF automatic optimization technology and the effectiveness of the very high frequency
discharge condition detection, is conducive to improve VHF discharge during the process of electrical discharge machining precision. |
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