摘要
针对复杂噪声背景下多通道高精度运动位置传感器信号处理的问题,在可编程FPGA芯片上设计并实现了一种信号实时解析与控制系统。系统应用基于LFSR的数字滤波器并通过α矩阵调节多通道信号的低通带频点,通过矫正识别计数方法区分位置与噪声信号特征,并结合4倍计数的冗余计数方法降低误差,最后系统输出触发控制信号。实验结果表明,系统能检测信噪比为1∶1环境下的并行多路运动位置传感器信号,且α介于8~250间的系统整体误差小于0.5%;对频率在25 kHz至800 kHz的位置传感信号,α介于8~11间的系统误差小于0.05%。各个单通道信号的解析时间与α成正比,为(3α+3) T_(sampling),系统具有实时性。
A real-time decoding and control system was designed to process multi-channel signals of high-precision motion position sensor in complex noise background and implemented on a programmable FPGA chip.The system applied a digital filter based on LFSR to adjust the low-pass band frequency of multi-channel signals through anαmatrix.The identification and correction method was used to distinguish features between motion position signal and noise signal.Meanwhile,the redundancy counting method used 4 times counting to reduce errors.Finally,the system output trigger signals.Experimental results show that the real-time decoding and control system can detect multi-channel signals of motion position sensor in parallel with a SNR ratio of 1∶1.The overall error rate is less than 0.5%whenαis between 8 and 250.For a motion position sensor signal with a frequency between 25 kHz and 800 kHz,αvalues range from 8 to 11 and the error rate is less than 0.05%.The signal decoding time for each channel is proportional toα,(3α+3)T sampling.And the system has a real-time performance.
作者
阮玮琪
贾文红
郑丽芳
李瑞
RUAN Weiqi;JIA Wenhong;ZHENG Lifang;LI Rui(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201204,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2018年第9期1360-1364,共5页
Chinese Journal of Sensors and Actuators
基金
国家重点研发计划(数字诊疗装备研发)试点专项项目(2016YFC0105402)
国家自然科学基金项目(11475251)
关键词
高精度运动位置传感器
并行多路信号
解析与控制
LFSR数字滤波通道
high-precision motion position sensor
parallel multi-channel signals
decoding and control
LFSR digital filter channels
