绝对式恒光源24位光电轴角编码器在光电经纬仪上的应用

Application of 24 Bit Photoelectric Shaft Angle Encoder With Absolute Constant Light Source In Photoelectric Theodolite

为满足某型光电经纬仪的使用要求,设计了某绝对式恒光源24位光电轴角编码器分系统。该编码器采用16位绝对式光学码盘,码盘刻划有粗码道、通圈码道、中精码道和精码道。精码道的线对数为16384(14位)。方位和高低编码器的处理电路设计在一块电路板上,采用一片DSP为主机,6个读数头输出64路码盘光电信号分别经放大整形、A/D转换输入至DSP。DSP完成数据采集、细分、译码、校正等处理,把轴的转角变换成24位自然二进制角度代码输出和上传。使用情况表明:该编码器的光机结构布局合理、性能稳定,电路板和元器件少、操作简单、测角精度高,满足某型光电经纬仪对于编码器系统的要求,具有较高的实用价值。

In order to meet the requirements of a photoelectric theodolite, a 24-bit photoelectric shaft angle encoder code subsystem of an absolute constant light source was designed. The encoder uses 16-bit absolute optical encoder, the code plate is engraved with coarse code, through the circle code, in the precision code and precision code, the line logarithm of the precision code is 16384 (14 bits). The processing circuit of the azimuth and high-low encoder was designed on a cir. cuit board. Using a piece of DSP as the host, the 64 channel code plate photoelectric signals output by 6 reading heads were respectively input to DSP through amplification shaping and A/D conversion. DSP completes data collection, subdivi. sion, decoding, correction and other processing, the shaft angle into 24 natural binary angle code output and upload. Usage indicated: that the structure and layout of the optical machine of the encoder were reasonable, the performance was stable, the circuit board and components were few, the operation was simple, the angle measurement precision was high, which met the requirements of a certain type of photoelectric theodolite for the encoder system. It has higher practical value.