JIA Zhen-hua, WANG Wen-lian
(Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, China)
Abstract： During the test on transient pressure signal in explosion field, false trigger caused by field interference can lead to test failure. To improve the stability of test system, a signal detection and recognition technology is proposed for transient pressure test system. In the process of signal acquisition, firstly, electrical levels are monitored in real time to find effective abrupt changes and mark them; then the effective data segments are detecdted totected; thus the effective signals can be acquired in turn finally. The experimental results show that the shock wave signal can be collected effectively and the reliability of the test system can be improved after removal of interferences.
Key words： signal recognition; shock wave signal; transient pressure test
CLD number： TP274 Document code： A
Article ID： 1674-8042（2016）01-0018-06 doi： 10.3969/j.issn.1674-8042.2016.01.004
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基于瞬态压力信号探测识别的无线分布式测试系统
贾振华， 王文廉
(中北大学 仪器科学与动态测试教育部重点实验室， 山西 太原 030051)
摘 要: 在爆炸场的瞬态压力测试过程中， 现场干扰容易引起误触发导致测试失败。 为了提高测试系统的稳定性， 本文提出了一种信号探测识别技术用于压力测试系统。 在信号循环采集过程中， 通过实时检测电平值， 标记有效突变， 对有效数据段进行特征检测， 从而识别出有效信号进行顺序采集。 实验证明， 该系统实现了冲击波信号有效采集、 减少了干扰以提高测试可靠性。
关键词: 信号识别； 冲击波信号； 瞬态压力测试
引用格式： JIA Zhen-hua, WANG Wen-lian. Wireless distributed test system based on transient pressure signal detection and recognition. Journal of Measurement Science and Instrumentation, 2016, 7(1)： 18-23. ［doi： 10.3969／j.issn.1674-8042.2016.01.004］
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