高精度小区播种机自校正系统研究

Highly Accurate Self-calibration System for Plot Seeders

在小区育种试验的播种环节过程中,小区行长和间隔的精准控制尤为关键,现常用的控制方式为北斗定位系统控制和编码器控制,但目前民用的北斗定位模块经过差分处理后,基本上接收北斗卫星发送的信号频率只能达到20 Hz,造成整个控制过程不是连续的。根据编码器的基本原理可知,控制精度虽低于北斗卫星,但编码器两个脉冲发送间隔低于北斗定位系统接收频率。为此,将编码器与北斗定位系统相互融合,设计了一种高净度的小区播种机自校正系统。大量田间试验结果表明:所研究的小区播种机自校正系统能够将小区长度误差精度控制在0.67%以内,相较于传统的编码器和北斗定位模式而言精度大大提升。

At present,the precise control of plot row lengths and intervals is particularly critical in the process of sowing seeds in plot breeding trials,for which the commonly used control methods are Beidou positioning system control and encoder control.However,the current civil BeiDou positioning module,after differential processing,basically receives signals sent by BeiDou satellites at a frequency of only 20 Hz,resulting in the entire control process not being continuous.According to the basic principle of the encoder,the control accuracy is lower than that of the Beidou satellite,but the interval between the two pulses sent by the encoder is lower than the frequency received by the Beidou positioning system.In this way the encoder and the Beidou positioning system are integrated with each other to design a high-clearance self-calibration system for plot seeders.The results of extensive field trials show that the plot seeder self-calibration system is able to control the plot length error accuracy to within 0.67%,which is a significant improvement over the traditional encoder and BeiDou positioning mode.