变形镜驱动器参数自动标定系统的设计

变形镜驱动器各通道的offset参数和gain参数直接影响到变形镜驱动器输出电压的精度,采用人工方式对其进行标定,不仅效率低,费时费力,而且参数的一致性也无法得到保证。为此,首先设计了AD采集器,其内部仅含一片24bit的高精度AD采集芯片,其并行的16端子输入接口通过继电器与采集芯片相连,内含的微处理器负责完成输入通道切换、采集时序控制和采集数据上传等功能；同时,还设计了上位机应用程序,实现了对变形镜驱动器以及AD采集器通信链路检查、标定过程控制参数设置、采集通道切换以及数据处理等相关操作命令和状态数据的收发,使得变形镜驱动器、AD采集器和上位机组成一套驱动器参数自动标定系统。结果表明,该系统不仅使得一套变形镜驱动器参数标定时间由原来的两个工作日缩短到2小时左右,而且提高了参数标定精度和一致性,其96通道零电压的最大误差由18.2mV降为13.5mV,均方差由原来的6.2mV降低为4.3mV,其输出最高电压120.000V的最大误差由23.4mV降为17.5mV,均方差由原来的10.1mV降低为8.3mV。

Design of automatic parameter calibration system for deformer mirror driver

Deformer mirror driver offset-parameter and gain-parameter have important influence on deformer mirror driver output voltage precision, manual calibration method on these two parameter not only cost too much time arduously, but also can not ensure parameter consistency. thus, one high precision AD voltage converter is designed, its input interface with 16 endpoint match deformer mirror driver module output interface very well, its MCU achieve input channel switch and work scheduling control among all other parts; also one application software is designed, it mainly achievers deformer mirror driver and AD converter communication link check, calibration process control parameter setup, sending or receiving command data and state device state information, these buildup one suit of automatic calibration system as to deformer mirror driver. Experience results shows that this system not only decrease calibration time from 1~2 work days to one hour, but also enhance offset-parameter and gain-parameter consistency.