采用光电传感技术获取种子下落信号后由单片机处理,实现了实际播种工况下播种量、漏播、重播量等参数的获取.系统采用-字线激光器和紧密排列的贴片光敏二极管分别作为光电传感器的发射端和接收端,实现了精密播种的无盲区监测,适用于直径大于2 mm的种子监测.设计了与该系统配套的自清洁装置,能有效保证监测系统在恶劣环境中可靠工作.采用气吸式玉米精量播种机对农大86玉米种子进行试验,并使用高速线阵相机对系统的监测精度进行验证.试验结果表明,该系统播种量监测精度达98%,漏播监测精度达96%,并具有较高的稳定性.%A real-time precision monitoring system for precision seeder was developed, and a single-chip microcomputer was used to process the signal of seeds dropping obtained by a photoelectric sensor. The information of seeds quantity, missing rate and multiples rate was all recorded in this system. A linear laser and patched photosensitive diodes which were arranged tightly in line were used as the emitter and receiver to achieve a no blind spot monitoring, it is better to monitoring seeds with an effective diameter of about 2mm or larger. A self-cleaning device was designed thereby guaranteed reliable operation of the monitoring system in severe environment. A pneumatic corn seeder and corn seeds "Nongda 86" were used in the experiment, meanwhile, a high-speed line camera was used to verify the accuracy of the system. Results indicated that the monitoring system had an accuracy of 98% in seeding quantity, an accuracy of 96% in missing detecting and a high reliability.
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