DEVICE FOR DETERMINING MOISTURE CONTENT OF A MULBERRY LEAF

摘要

ABSTRACT A device for determining moisture content of a mulberry leaf comprising a sensing unit comprising a parallel plate capacitor, an electronic circuitry comprising a charging circuit and a discharging circuit along with the parallel plate capacitor, a comparator for providing digital outputs from voltage inputs of the charging and discharging circuits, a microcontroller processing the digital outputs by using a set of preprogrammed instructions and a display unit for data interpretation, wherein an average time taken for the capacitor to charge to 0.632 times to that of a maximum power supply voltage and then discharging completely is determined by repeating the charging and discharging the capacitor for at least 5 times in the microcontroller. In an embodiment, the average time is determined before and after placing the leaf in the sensing unit which provides different dielectric mediums comprising air and the mulberry leaf.