中国光学2011，Vol.4Issue(4)：411-417,7.
基于DSP的高功率TEACO2激光器控制系统的高精度数据采集
High precision data acquisition of control system for high-power TEA CO2 laser based on DSP
摘要
Abstract
It shows larger conversion errors and stronger electromagnetic interference when the AD converter（ADC） built in DSPF2812 of the control system for a high-power TEA CO2 laser based on the DSP is used to acquire analog signals.To overcome the backcomings,a method to correct the ADC built in the DSPF2812 was proposed based on both the hardware and software.In hardware processing,the analog filtering and isolation module were adopted to process the input analog signals and the median average filtering method was used to eliminate the occasional glitch.With software correction,two given reference voltages were sent to the two channels of the A/D converter of the DSPF2812 to calculate the offset error and gain error,then it was used to correct other channels of the A/D converter.Furthermore,the impact of the reference voltage and A/D sample clock on the A/D conversion precision was analyzed by experiments.The experimental results show that the method can improve the precision of the A/D converter effectively.The A/D conversion error has been within 3 LSB,which can ensure the stability and reliability of data acquisition for the control system in high-power TEA CO2 lasers.关键词
高功率TEA/C02激光器/数据采集/DSP/F2812/A／D转换/误差校正Key words
high-power TEA CO2 laser/data acquisition/DSP F2812/A/D conversion/error correction分类
信息技术与安全科学引用本文复制引用
王鹤淇,孟范江,郭立红,管目强..基于DSP的高功率TEACO2激光器控制系统的高精度数据采集[J].中国光学,2011,4(4):411-417,7.基金项目
激光与物质相互作用国家重点实验室研究基金资助项目（No.SKLLIM0902431) （）
