The Algorithmic Research on the Acquisition of Multiplex Pulse Period

In view of the need to examine the performance of seeding for corn precise seeder, a study has been carried on the interrupt examination with a timer to eight group pulse intervals the assembly language procedure algorithm and the hardware circuit, and realized in MCS-51 monolithic computer systems. This paper proposed the absolute-clock and the relative-clock's thought; has found a special time-constant, has avoided in the data treating processes many bytes multiplication and division operation, has guaranteed the examination timeliness; has solved the time computation error problem when the multiplex pulses simultaneously arrived. We carried on the analysis to the examination timeliness and the examination data's storage space demand, eight group examination's most greatly realtime errors are smaller than 1 ms, saves eight group examination data (each group 500 gap data) to need 8 KB RAM space.