Abstract
This paper studies the method of signal acquisition for the incremental photoelectric encoder based on FPGA. According to the specification of the photoelectric encoder, corresponding interface circuit is designed. With FPGA as the main control module, the peripheral circuit can work together harmoniously. The simulation analysis shows that results of frequency subdivision and direction discrimination are correct under the control of FPGA (Field Programmable Gate Array). A ZSP3806 photoelectric encoder is used as the sensor to detect the position of mirror scanning mechanism, and experimental result indicates that the angular displacement of measured value is consistent with theoretical requirements.
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