摘要
根据铁镍合金具有较高的磁致伸缩系数及优良的机械性能,研制了一种基于铁镍合金材料威德曼效应的位移传感器。通过测量铁镍合金波导丝中激励脉冲信号与弹性波信号间的时间差而获得活动永磁的位移量。设计了传感器的脉冲激励电流发生电路及检测线圈感应信号处理电路,给出了实验结果并对其进行了分析。结果表明:铁镍合金弹性波位移传感器具有良好的线性度以及较高的灵敏度和测量精度。
According to high magnetostriction and excellent mechanical characters of the Fe-Ni alloy, a kind of displacement sensor based on Fe-Ni alloy material＇ s Wiedemann effect was developed. It can get the permanent magnet＇ s displacement to test coil by measuring the time delay between incentive pulse signals and elastic wave signals. The pulse excitation current generating and test coil induction signal processing circuits of the sensor were also designed, the experimental results were given and analyzed. The results show that the Fe-Ni alloy elastic wave displacement sensor possesses good linearity, high sensitivity and measurement accuracy.
出处
《仪表技术与传感器》
CSCD
北大核心
2013年第12期9-11,共3页
Instrument Technique and Sensor
关键词
威德曼效应
铁镍合金
弹性波位移传感器
Wiedemann effect
Fe-Ni alloy
elastic waves displacement sensor
