一种新型含水率传感器装置

土是一种多项体系,含水率对土的导电性起控制作用,据此自行设计了一种新型的含水率传感器装置,用电路板上保护电阻两端的电压作信号反映含水率的变化。将传感器在砂子和砂土中进行标定,得到含水率与电压的线性变化关系,并将该装置运用在雾雨入渗滑坡模型试验中测试含水率的变化情况。由测量结果知:该种装置能够方便、迅速、较准确地得到含水率的变化情况,能够满足雾雨入渗滑坡模型试验,但渗透关系、温度的影响没有考虑进去,还需要以后进一步的改进。

A Novel Moisture Content Sensor

The electrical conductivity of soil is controlled by the moisture content. With the voltage on both ends of the protective resistor in the circuit board as the signal to reflect the changes of moisture content, we designed a sensor for the moisture content. The sensors were calibrated in sand and sandy soil to obtain the linear variation relation between moisture content and voltage. The device is applied to the model of landslide induced by fog and rain infiltration to test the changes of moisture content. Results show that through this device we can get the moisture content variation conveniently, quickly and more accurately. It can meet the requirements of the landslide model test, but the infiltration relation and the influence of temperature were not taken into consideration. Further research and improvements are needed.