Driver Module Design Of Linear CCD And Application Research

For the needs of industrial geometry measurement in a fast and accurate way, the linear CCD(Charge-coupled Device, TCD1501D) drive module has been designed, and the appropriate measurement experimental system has been established for application research. The main work of this paper can be divided into the following parts.Firstly, through extensive literature research and study, the working principle and application characteristics of linear CCD has been mastered. The needs of standard shafts and precision core’s size measurement in industry have been mainly researched. The appropriate measurement solution has been determined.Secondly, the TCD1501 D driver modules used EP2C5Q208C8 N as a control chip has been designed. The drive module CCD driving circuit, AD sampling circuit, USB communication interface circuit has been designed. The actual production of the drive circuit has been completed. Through programming in Verilog language, FPGA chip can output the control timing of TCD1501 D.The three-wire serial communication interface used to communicate with the sampling chip AD9826 has been achieved. Configuration AD9826 operating mode via the communication interface, the CCD data correlated double sampling has been realized.Thirdly, the USB descriptors have been configured for the drive module and the USB firmware procedures has been completed. The design of Windows driver has been researched and the USB driver for the driver module has been completed. In order to achieve the normal communication between PC and drive module, a program has been completed to control the USB interface transmission and AD sampling, so as to achieve the automation of driver module.Fourthly, the drive module has been applied to the transmission-type measurement system. The output data of driving module has been optimized. Through Comparing various de-noising algorithm, the suitable de-noising algorithm for the drive module has been selected. Based on this driver module, the optimum point and the least-squares fitting algorithm has been proposed to make edge subdivision. The experiments show the feasibility of the algorithm. For different edge subdivision algorithm, two different edge location algorithms have been proposed. The suitable edge subdivision algorithm for the edge location algorithm has been analyzed theoretically.Finally, the experimental platform has been established in the laboratory environment. The gross errors exist in the measurement data. Through the optimize analysis of a large number of measurement data, a method of removing error for this measurement applications has been proposed. Through validation, this method can greatly enhance the measurement accuracy.The drive module has been designed to drive TCD1501 D on 1MHz frequency, using USB2.0 communication with the computer. The results prove the stability and reliability of the system are to meet the actual requirements of the transmission measurement.