土壤含水量传感器的研究和实验

阐述了果树土壤含水量传感器的研究现状、传感器的基本原理、结构组成、信号转换调节电路和标定测量方法、实验结果等。土壤含水量传感器将成本低廉的石膏块法加以改进。将平行电极改为同心螺旋电极，较之传统的石膏块平衡速度提高，响应时间缩短。研究表明。植物的蒸腾流速率与土壤含水量密切相关。蒸腾流速率随土壤含水量的增加而增强。在土壤含水量达到一定程度后。蒸腾流速率才不受其影响。

The Study and Experiment of Soil Moisture Sensor

The article presents soil moisture sensor of which the present study conditions at home and abroad, the basic principle to sense, the structure and composition , the circuit to transfer or adjust signal , the methods to demarcate and measure and the outcome. The Soil moisture sensor improves the cheap cost method of a porous absorbent block, to change parallel electrodes with concentric and spiral ones. When the new sensor is compared with the traditional sensor, it is quicker in balance velocity and response time.