ZHAI Yu-peng1, ZHANG Zhi-jie1,2, ZHANG Hao1
（1. School of Instrument and Electronics, North University of China, Taiyuan 030051, China； 2. Key Laboratory of Instrumentation Science and Dynamic Measurement (North University of China), Ministry of Education, Taiyuan 030051, China）
Abstract： In view of the influence and harm of low frequency vibration environment on the structure of spaceflight products, a low frequency dynamic study method for piezoelectric sensor based on the dynamic system of sinusoidal pressure is proposed. This method uses a sinusoidal pressure dynamic system with two-way dual channel import and export synchronization technology to study the low frequency characteristics of a piezoelectric sensor of PCB company, and its lower cut-off frequency is 0.26 Hz. It is also studied that when the frequency of the measured vibration or shock signal is 1-200 kHz, the error range of signal positive pressure action time is 4.87%-0.03%. The dynamic compensation for the low frequency of the vibration sensor is carried out, and the compensation effect is good.
Key words： low frequency vibration; piezoelectric sensor; lower cut-off frequency; sinusoidal pressure dynamic system; low frequency dynamic compensation
CLD number： TB53； TP212 Document code： A
Article ID： 1674-8042（2019）02-0176-06 doi： 10.3969/j.issn.1674-8042.2019.02.010
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振动测试用传感器低频特性分析与补偿
翟宇鹏1， 张志杰1,2， 张浩1
（1. 中北大学 仪器与电子学院， 山西 太原 030051； 2. 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： 针对低频振动环境对航天产品结构的影响和危害， 提出了基于正弦压力动态系统的一种振动测试用压电传感器低频动态研究方法， 该方法应用双向双通道进出口同步技术的正弦压力动态系统对PCB公司的某压电传感器低频特性进行了实验研究， 得到其下限截止频率为0.26 Hz。 研究发现， 当被测振动或冲击信号频率在1～200 kHz时， 信号的正压作用时间的误差范围为4.87%～0.03%。 并针对测振传感器低频响应进行了补偿， 补偿效果良好。
关键词： 低频振动； 压电传感器； 下限截止频率； 正弦压力动态系统； 低频动态补偿
引用格式：ZHAI Yu-peng, ZHANG Zhi-jie, ZHANG Hao. Analysis and compensation of low frequency characteristics of sensors for vibration testing. Journal of Measurement Science and Instrumentation, 2019, 10（2）： 176-181. ［doi： 10.3969／j.issn.1674-8042.2019.02.010］
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