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This apparatus consists of capacitive sensor, C/V switching circuit, A/D convertor and LCD
digital display circuit.
Theory: when the capacitance-type sensor is inserted in a certain pile of grain, its mediun is the target grain, because permittivity of water is much higher than others, the minute changes of grain will cause big response from the sensor. Through the C/V switching circuit and A/D convertor, the moist percentage of certain grain will display on the LCD.
This apparatus consists of capacitive sensor, C/V switching circuit, A/D convertor and LCD
digital display circuit.
Theory: when the capacitance-type sensor is inserted in a certain pile of grain, its mediun is the target grain, because permittivity of water is much higher than others, the minute changes of grain will cause big response from the sensor. Through the C/V switching circuit and A/D convertor, the moist percentage of certain grain will display on the LCD.