【摘要】 简述了微波干燥法测量物料含水率的原理,进行了微波水分测量仪的整体设计,设计了微波干燥装置、高精度质量传感器及调理电路,同时进行了仪器单片机控制电路的软硬件设计,并制作了仪器实体。从试验结果可以看出,微波水分测量仪对物料含水率的测量时间为4 min左右,测量误差小于0.05%。与常规微波衰减法含水率测量仪相比,采用微波干燥法测量物料含水率具有速度快、精度高的优点。更多还原

【Abstract】 The principle of the moisture measuring with microwave drying was analyzed theoretically,and the microwave heater,the power supply system,the high precision weight sensor and the single chip microcomputer(SCM) system were all designed.The software and hardware of the moisture measuring instrument were developed in the lab.Through the experimental data,it takes only about 4 minutes to measure the moisture ratio with the microwave moisture measuring instrument,and the measurement errors are less than 0.05%.Compared with the traditional moisture measuring instrument using microwave attenuation method,the new instrument with microwave drying can detect the moisture of solid material rapidly with high precision.更多还原