数字式谷物水分测试仪

给出了以AT89C52单片机为核心的谷物水分测试仪的硬件组成，并详细介绍了信号处理和测量方法。通过对传感器的标定并进行相应的回归处理，可得到介质损失角和谷物水分的函数关系，并将此函数关系存入单片机的存储器中。这样检测系统只要测量出谷物的介质损失角，单片机通过查表和计算即可获知谷物的水分含量。实验表明：该仪器重复性好，测量精度高。

Digital Measuring Instrument for Grain Moisture Content

The hardware structure of grain moisture measuring instrument was developed based on AT89C52 single-chip computer. Through demarcating sensor and corresponding regress manage,can get relation between dielectric loss angle and grain moisture content. The relation was stored to memory of single-chip computer. If only dielectric loss angle of grain was measured, the measuring system can get grain moisture content by seeking table and calculating. The results of experiments show that the instrument has good repeatability and high precision.