Design and application of a wireless, passive, resonant-circuit environmental monitoring sensor
Design and application of a wireless, passive, resonant-circuit environmental monitoring sensor
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DOI：
10.1016/s0924-4247(01)00624-0
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发表时间：
2001-08-25
影响因子：
4.6
通讯作者：
Singh, RS
中科院分区：
文献类型：
--
作者：
Ong, KG;Grimes, CA;Singh, RS
提出了一种能够监测周围介质的复介电常数、温度、湿度和压力的无线无源远程查询传感器平台。该传感器是一个平面二维电感电容电路，可缩放的大小，谐振在一个特征频率的值取决于感兴趣的参数。通过测量天线的阻抗或电压谱，利用一个或一对环形天线远程检测传感器的谐振频率，然后根据测量的谐振频率计算感兴趣的环境参数。该平台的无线远程查询特性使LC传感器能够从密封的不透明容器内监测环境条件。本文介绍了传感器平台的工作原理，设计标准，说明性的应用程序，和性能限制。(C)2001 Elsevier Science B.V.保留所有权利。
A wireless, passive, remote query sensor platform is presented capable of monitoring the complex permittivity of a surrounding medium, temperature, humidity, and pressure. The sensor is a planar two-dimensional inductor-capacitor circuit, of scaleable-size, that resonates at a characteristic frequency the value of which is dependent upon the parameters of interest. The resonant frequency of the sensor is detected remotely with one or a pair of loop antennas by measuring the impedance or voltage spectrum of the antenna(s), with the environmental parameters of interest then calculated from the measured resonant frequency. The wireless, remote query nature of the platform enables the LC sensor to monitor the environmental conditions from within sealed opaque containers. The paper describes the operational principles, design criteria, illustrative applications, and performance limitations of the sensor platform. (C) 2001 Elsevier Science B.V. All rights reserved.