针对现有的链勺式排种器马铃薯播种机作业过程中普遍存在的漏播现象,以PIC16F877单片机为核心,提出了一种由漏播检测启动信号生成电路、红外漏播检测电路和窝眼轮式排种系统构成的漏播检测补偿新方案。漏播检测启动信号生成电路主要由永磁铁和干簧继电器电路构成,每当固定于取种勺底板上的永磁铁略过干簧继电器时,都会触发系统进行一次基于红外信号发射、接收的漏播检测工作,系统软件基于PIC16F877特定引脚上一定时间段内发生电平变化的次数做出是否漏播的判断;如果确定漏播事件发生,PIC16F877将迅速发出补种指令,窝眼轮式排种器在步进电机带动下迅速旋转90°将待补薯种排入导种槽,从而实现漏播补偿。试验结果表明,该系统漏播检测的准确率>99.8%,补种成功率>75%,总播种成功率>96.5%,链勺式排种器马铃薯播种机的漏播被有效抑制。 Aiming at the leakage phenomenon existing in the operation of existing chain scoop potato planter, taking PIC16F877 as the core, this paper puts forward a kind of signal detection circuit which consists of leak detection start signal generation circuit, infrared leak detection circuit, A New Scheme of Missing Detection and Compensation Based on Wheeled Seeding System. Leakage detection start signal generating circuit is mainly composed of permanent magnet and reed relay circuit, whenever fixed on the spoon plate on the permanent magnet skip reed relay, will trigger the system to launch an infrared signal based on the receiver Broadcast testing, the system software based PIC16F877 specific pin on the level of changes in the number of times to make a decision whether to make leaks; if the missed event occurs, PIC16F877 will promptly send replanting instructions, nest wheel row Driven by the stepper motor, the spinner is rapidly rotated by 90 ° and the potato species to be fed into the guide groove is discharged, so as to realize the leakage compensation. The test results showed that the accuracy of leak detection of the system was 99.8%, the success rate of replanting was> 75% and the success rate of total sowing was> 96.5%. The leakage of chain scoop potato seed sowing machine was effectively suppressed.