Development of a Grain Moisture Content Measurement Sensor for Automatic Control of Rough Rice Drying by Natural Air

미곡(米穀) 상온통풍건조(常温通風乾燥)의 자동제어용(自動制御用) 곡물(穀物) 함수율(含水率) 측정(測定)센서 개발(開發)

This study was conducted to develop a grain moisture content measurement sensor for automatic control of rough rice drying by natural air. For the above objective, the electrod type sensor was designed and tested. The sensor was able to produce electrical resistance which changes with moisture content of grain. An A/D converter and a micro-computer wed for processing measurement data of sensor. The developed sensor satisfied most design requirements and the results of statistical analysis show that there it no difference between the measurement method of sensor developed and of the dry-oven. Using the developed sensor and measurement system, we are able to measure moisture content of rough rice automatically in drying by natural air.