An Anti-jamming Counting Approach for Pulse Signal of Displacement Sensor
This paper analyzes the variation of A-phase and Bphase pulse signals that displacement sensor outputs. A new anti-jamming counting approach is designed according to Gray code. This counting approach does not cause error count and counting precision is improved by four times frequency count. The principle of hardware and software is indroduced in two application examples. In the first example, the input ports of AT89C52 MCU are connected to the outputs of hand rotary encoder. The MCU constantly checks the state of inputs in the timer interrupt and counts with this counting approach, then the count value is transferred to host computer through the RS422 interface. In the other example, the outputs of optical encoder are connected to the I/O ports of CPLD/FPGA chip which can count with this counting approach. Then the count value is transferred to host MCU/DSP through data lines. The applications resulted that the approach is good and the hardware circuit is simple, stable and reliable. The method has a certain practical value and can be applied to the antijamming counting for the other sensors which have the same output waveform.
encoder pulse count anti-jamming
Hongbiao Han Jishun Li
School of Mechatronics Engineering Henan University of Science and Technology Luoyang, Henan, China Henan Key Lab for Machinery Design and Transmission System Luoyang, Henan, China
国际会议
太原
英文
91-94
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）