Monitoring of Water Content in Building Materials Using a Wireless Passive Sensor

被引：44

作者：

Stojanovic, Goran ^{[1
]}

Radovanovic, Milan ^{[1
]}

Malesev, Mirjana ^{[1
]}

Radonjanin, Vlastimir ^{[1
]}

机构：

[1] Univ Novi Sad, Fac Tech Sci, Novi Sad 21000, Serbia

来源：

SENSORS | 2010年 / 10卷 / 05期

关键词：

LC sensor; wireless; humidity; building materials; FOOD QUALITY;

D O I：

10.3390/s100504270

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper describes an innovative design of a wireless, passive LC sensor and its application for monitoring of water content in building materials. The sensor was embedded in test material samples so that the internal water content of the samples could be measured with an antenna by tracking the changes in the sensor's resonant frequency. Since the dielectric constant of water was much higher compared with that of the test samples, the presence of water in the samples increased the capacitance of the LC circuit, thus decreasing the sensor's resonant frequency. The sensor is made up of a printed circuit board in one metal layer and water content has been determined for clay brick and autoclaved aerated concrete block, both widely used construction materials. Measurements were conducted at room temperature using a HP-4194A Impedance/Gain-Phase Analyzer instrument.

引用

页码：4270 / 4280

页数：11

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