基于国产FPGA的增量式光电编码器测速电路研究

Research of Speed Measuring Circuit of Incremental Photoelectric Encoder Based on Domestic FPGA

摘要:

利用增量式光电编码器测量电机转速对伺服控制有着至关重要的作用;针对于目前测速系统对频率、实时性等方面的要求,并结合国产FPGA(field－programmable gate array可编程逻辑器件)芯片的优势,提出利用嵌有ARM(acorn rISC machine)内核的国产FPGA芯片CME_M7作为硬件开发平台,并采用Verilog HDL(HDL:hardware description language硬件描述语言)语言编程的方法,设计了一种基于国产FPGA的增量式光电编码器测量电机转速的测速电路;经过实验验证,证明了所设计的测速电路精度高、测速范围宽、实时性好、抗干扰能力强。

Abstract:

It is very important to measure the speed of motor by using the incremental photoelectric encoder for the servo motion system. According to the requirement of frequency and real-time of the speed measuring system and combining with China’s own production of FPGA(Field－Programmable Gate Array)chip, it proposed a method by using domestic FPGA chip-CME M7 which embed ARM kernel as the developing platform of the hardware and Verilog HDL to programme to design a speed measuring circuit of motor of incremental photoelectric encoder based on domestic FPGA. Through the verification of the experiment, it is proved that the design of the speed measuring circuit is high precision, wide speed range, good real-time performance and strong anti-interference ability. 