基于fpga的增量型光电编码器抗抖动二倍频电路设计（Design of anti jitter two octave circuit of incremental photoelectric encoder based on FPGA）.docVIP

基于fpga的增量型光电编码器抗抖动二倍频电路设计（Design of anti jitter two octave circuit of incremental photoelectric encoder based on FPGA） Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Design of anti jitter two octave circuit of incremental photoelectric encoder based on FPGA See Wang Junshan Cheng Xiao Ying In some fields of industrial automatic control and some equipment applications, we often encounter various occasions requiring measurement of length, and photoelectric encoder is usually used at present. Photoelectric encoder according to its calibration method and signal output form, can be divided into incremental, absolute, mixed type three. It is a sensor which integrates light, machine and electricity. It has many advantages, such as high precision, fast response, stable and reliable performance. It can precisely detect parameters such as angle, speed, displacement and so on. It can change the physical quantities such as displacement into digital pulse signals, and realize accurate displacement measurement by calculating the number of pulses. However, due to the working environment and other factors, the output signal of the incremental photoelectric encoder contains more jitter error code pulse, which will lead to error counting. This paper analyzes the causes of bit error pulse, and designs an effective filter circuit. The working principle of incremental encoder 1, incremental encoder is a kind of through the photoelectric conversion of mechanical geometric displacement on the output shaft of the sensor is converted into pulse or digital quantity, it is composed of a grating disc and a photoelectric detection device. The grating disk is divided into several rectangular holes on a circular plate of a certain diameter, as shown in figure 1. The photoelectric encoder is coaxial with the electric motor, when the motor rotates, the grating disc and the motor rotate at the sa