Precision Seeding Monitoring System for Cooperative Operation of Multicast Lines

In the operation process of traditional air-suction seeders, the phenomenon of missing seeding and reseeding is often caused by the blockage of the seed guide tube, the lack of a seed box and mechanical failure. If it is not found in time, it may lead to the phenomenon of a large area of missing seeding or reseeding, which will affect the crop yield. To solve the above problems, the team designed and developed a precision seeding monitoring system that can support the cooperative operation of up to 24 seeding lines. The system includes the design of an infrared photoelectric monitoring unit, a speed monitoring unit, a controller unit, a central control instrument unit and a fault alarm unit. The results of the bench test show that the designed monitoring system can monitor the cooperative operation of 24 seeding lines in real time, identify the seeding line number in time and accurately when the phenomenon of missing or rebroadcasting occurs, and give fault alarm. The alarm success rate reaches 100%, and the average response time is less than 0.5 s. The results of field experiments showed that the average accuracy of the system was over 98.5%, and the average accuracy of the pass rate, miss rate and replay rate was over 96.6%, 97.4% and 98.8%, respectively, under the normal operation speed of 4–12 km/h. It is of great significance to improve seeding quality and reduce production cost.