摘要
对基于压电陶瓷的磁致伸缩位移传感器进行建模与分析。通过磁极化强度模型,分析了弹性波机理。以波导丝和压电陶瓷拾音器为讨论核心,综合运用弹性波振动模型、磁机耦合关系、压电效应等理论,推导了传感器系统的磁机耦合模型及电压输出模型,表明了系统结果主要与磁场强度、脉冲电流、距离、材料参数等有关。通过搭建以压电陶瓷作拾音器的磁致伸缩位移传感器系统,比较模型数据和实验结果,证明了系统模型的合理性,为磁致伸缩位移传感器的研究提供了理论参考。
Modeling and analyzing were proceeded on the magnetostrictive displacement sensor based on piezoelectric ceramic.The theory of elastic wave was analyzed using magnetic pole intensity model. Based on waveguide wire and piezoelectric ceramic,magnetic machine coupling model and voltage output model of the sensor system were deduced with the combination of the theories of elastic waves vibration model,magnetic machine coupling relationship and piezoelectric effect. It proves that the result is primarily related to magnetic field intensity,pulse current,distance and material parameter etc. The system model is proved to be reasonable by setting up the system of magnetostrictive displacement sensor which uses piezoelectric ceramic as the elastic wave pickup and comparing the model data and experimental results. The system model provides a theoretical reference for the study of magnetostrictive displacement sensor.
出处
《仪表技术与传感器》
CSCD
北大核心
2016年第1期9-12,共4页
Instrument Technique and Sensor
基金
国家自然科学基金项目(61172181)
关键词
磁致伸缩
位移传感器
弹性波
压电陶瓷
magnetostriction
displacement sensor
elastic wave
piezoelectric ceramic
