Design of Image Acquisition and Preprocessing of Precise Linear Encoder Based on FPGA

According to the method of image acquisition for analyzing precision linear encoder displacement with the problem of low acquisition speed, an image and preprocessing system of encoding and decoding is designed in which FPGA is the core device. All modules are accomplished by taking Altera’s Cyclone IV series EP4CE10E22C8N as the main control chip, designed on Quartus II 15.0 which is software development platform. Each module has repeating tests to accomplish the function. The result is real-time displayed on VGA monitor and provides a reliable pretreatment data for next DSP realization of linear encoder displacement measurement.