Seed drill monitoring system - with pulses generated by machine travel compared with those generated by grain delivery

摘要

The sewing machine delivers seed or grain at fixed spacings. The length of a path section sown by the machine is measured by counting electrical pulses which are generated as a wheel turns during the machine travel. Each grain delivered by the machine generates an electrical pulse, and there is an electrical indication instrument. The pulses from the wheel (30) are generated after each centimetre path of the machine. The number of track pulses is indicated when ten grain pulses have been produced. Alternatively the number of grain pulses generated after one thousand track pulses can be displayed.