Development of automatic monitor and digital seed rate display system of precision drill

摘要

In order to improve the drilling quality and the automation of the precision drill, an automatic monitoring alarm and digital seed rate display system was developed. It is composed of medium scale integral voltage comparators, 555 time-base circuits, 40110 counting decoding drive circuits and infrared photodiode sensors. It can automaticallymonitor the working process of the precision drill and display seed rate in digit.