Passive Wireless Sensor for Force Measurements
Passive Wireless Sensor for Force Measurements
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DOI：
10.1109/tmag.2014.2359334
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发表时间：
2015-01-01
影响因子：
2.1
通讯作者：
Damnjanovic, Mirjana S.
中科院分区：
文献类型：
--
作者：
Kisic, Milica G.;Blaz, Nelu V.;Damnjanovic, Mirjana S.
本文的目的是研究一种无线被动式感测器的制作与设计，并将其应用于法向力的量测。所提出的力传感器包括一个单一的线圈作为一个重要的组成部分，实现印刷电路板技术，市售的弹性体，和铁氧体磁芯。通过相位下降技术，使用外部线圈天线无线测量施加的力的可变值。通过向传感器施加力，弹性体变形并且铁氧体接近线圈，导致线圈的电感变化。结果，天线-传感器系统的谐振频率向较低频率偏移。实验装置进行测试和表征开发的力传感器。在0 ~ 75 N的测力范围内，灵敏度达到311 kHz/N。测量结果证明了理论和分析计算，以及电气模拟。
The goal of this paper is to investigate fabrication and design of a wireless passive sensor, and its application for measuring normal forces. The proposed force sensor consists of a single coil as an essential part, realized in printed circuit board technology, commercially available elastomer, and ferrite core. Measurements are done wirelessly for variable values of applied force by phase-dip technique, using an external coil antenna. By applying force to the sensor, the elastomer deforms and ferrite approaches to the coil, causing changes to the inductance of the coil. As a result, the resonant frequency of the antenna-sensor system shifts toward lower frequencies. The experimental setup is conducted to test and characterize the developed force sensor. A high sensitivity of 311 kHz/N is achieved in the measured force range from 0 to 75 N. The measurement results proved the theoretical and analytical calculations, as well as the electrical simulations.