射频谐振式电感传感器转换电路设计  

Design of Conversion Circuit for Radio Frequency Resonant Inductance Sensor

作　　者：骆先达 傅星[1] LUO Xian-da;FU Xing(School of Precision Instrument and Optoelectronics Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《自动化与仪表》2021年第12期89-91,共3页Automation & Instrumentation

基　　金：国家重点研发计划(课题)项目(2017YFF0107003)。

摘　　要：电感传感器在测量与仪器仪表中的应用非常广泛,而转换电路是此类传感器的重要组成部分,直接影响传感器的性能。该文提出了一种在射频下以谐振方式工作的电感传感器转换电路设计。原理分析表明,在电感类仪表中,采取提高激励频率和使电路工作在谐振状态的设计,可以明显提高测量仪表的灵敏度和分辨力。通过搭建相应的实验系统,验证了该设计的有效性。在微位移测量实验中,得到了在同等条件下,灵敏度比传统设计提高Q倍的实验结果。Inductive sensors are widely used in measurement and instrumentation.As an important part of the inductive sensor,the conversion circuit directly affects the performance of the sensor.In this paper,a conversion circuit design of an inductive sensor that works in resonance at radio frequency is proposed.Principle analysis shows that in inductance meters,the design of increasing the excitation frequency and making the circuit work in resonance can significantly improve the sensitivity and resolution of the measuring instrument.The effectiveness of the design is verified by building a corresponding experimental system.In the micro-displacement measurement experiment,under the same conditions,the sensitivity is more than Q times higher than that of the traditional design.

关 键 词：谐振 射频 电感传感器 灵敏度 分辨力 转换电路 

分 类 号：TH862[机械工程—仪器科学与技术]