A Pipeline Tension Detection System for Precision Paddy Field Pesticide Spraying

The Pipeline Tension Detection System (PTDS) is the essential part of the precision paddy field pesticide sprayer. The pipeline can maintain a tension state through an automatic winding system based on the PTDS. It is very useful to expand the working width and to improve the working efficiency of the precision paddy field pesticide sprayer. A PTDS based on the C8051F040 MCU was developed; include the design of the conditioning circuits for the tension sensors and the power system, and the calibration for the tension sensors. The program of the tension detection and the motor control system were developed by programming language C51. The results showed that the average errors of the tension detection used by the PTDS was about 1.8N, the standard deviation was about 0.6548N, and the response time from the tension detection to the operation of the automatic winding system was about 100ms. It basically satisfies the ultra working-width requirements of the precision paddy field pesticide sprayer.