2013•Transducer and Microsystem TechnologiesRequires access
Design of node circuit for a soil profile moisture sensor
Fei Liu
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Abstract
In order to achieve soil moisture measurement of different depths of soil profile,a soil profile moisture sensor is designed,especially circuit of sensor node is designed and implemented which is low-cost and low power consumption.The experimental results show that the sensor output voltage with this circuit decreases with soil moisture content increasing,and by comparing the actual value of the soil moisture with the sensor measurements,the maximum absolute error of sensor is-5.10 %.The sensor can be used for measurement of soil moisture at different depth of soil profile,moisture gradient change is apparent,the performance is good.