光学计量用高速线阵CCD数据采集系统设计

Design of a data acquisition system for high speed linear CCD used for optical metrology

介绍一种采用高速线阵 CCD 数据采集系统的设计过程。通过一片 MicroChip 公司的在线可编程微控制器对采集系统进行控制,并用标准 RS232 串行接口与外部进行数据通信和控制。在时序逻辑设计中,较好地解决了数据的存储、读取和点像元数据连续监测。实际应用表明该系统能满足光学干涉计量中线阵 CCD 数据采集要求。由于可以对线阵 CCD 进行单点、多点和整块数据的读取处理,因而可适应于不同周期、不同像素数目的线阵 CCD 传感器,以满足多种不同需求。

Design process for a data acquisition system with high speed linear CCD is presented. Data acquiring system is controlled by an on-line programmable logic controller made by Microchip. Its external data communication and control are carried out with standard RS232 serial port. Data storage, reading and continuous monitoring of point pixels have been well solved in design of time sequence logic. The practical applications show that the system can fulfill the demands for data acquisition with linear CCD in optical interferometry. Since reading data of CCD can be performed with single point, muti-point and bulk mode, the method is suitable for linear CCDs with different periods, different pixels, and can fulfill different application demand.