基于随机共振的大件平板受力信号提取
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摘要
针对大件受力检测中的直流输出电压信号淹没在噪声中,导致提取结果不准确,提出了一种周期性脉宽调制(PWM)波结合随机共振提取直流微弱信号的方法。通过PWM波将原始信号调制成待测信号,利用随机共振系统检测待测信号;通过低通滤波器对输出信号进行滤波;还原有用信号。经过仿真实验分析,对比传统直流微弱信号检测方法,提出的方法信号提取结果的误差较小,可达到检测的目的。
Aiming at the DC output voltage signal is submerged in noise in bulky force detection which results in inaccurate results,put forward a kind of method combines periodic pulse-width modulation( PWM) wave with stochastic resonance for DC weak signal extraction. The original signal is modulated into the signal to be measured by PWM wave. The random resonance system is used to detect the signal to be measured,and the output signal is filtered by low-pass filter,and the useful signal is restored. Through simulation experiment analysis,compare with traditional DC weak signal detection method,the error of extracted results by this method is less than that of traditional weak signal detection method,and it can achieves the purpose of detection.
Aiming at the DC output voltage signal is submerged in noise in bulky force detection which results in inaccurate results,put forward a kind of method combines periodic pulse-width modulation( PWM) wave with stochastic resonance for DC weak signal extraction. The original signal is modulated into the signal to be measured by PWM wave. The random resonance system is used to detect the signal to be measured,and the output signal is filtered by low-pass filter,and the useful signal is restored. Through simulation experiment analysis,compare with traditional DC weak signal detection method,the error of extracted results by this method is less than that of traditional weak signal detection method,and it can achieves the purpose of detection.
引文
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[13]周耀辉,王芸波,朱维新,等.IIR数字滤波器设计[J].电力自动化设备,2010,30(9):129-131.
[2]戴蓉,刘波峰,赵燕,等.传感器原理与工程应用[M].北京:电子工业出版社,2013.
[3]张丹,刘新华,张家亮,等.一种适用于微弱传感信号检测的锁相放大电路[J].计算机工程与应用,2013,49(15):210-214.
[4]王艳菊,王玉田,王忠东.用于气体差分检测的微弱信号处理电路的研究[J].传感器与微系统,2006,25(6):13-15.
[5]吉训生,王寿荣,许宜申,等.自适应Kalman滤波在MEMS陀螺仪信号处理中的应用[J].传感器与微系统,2006,25(9):79-81.
[6]Xia D,Jiang G,Li Y,et al.Warp-knitted fabric defect segmentation based on non-subsampled Contourlet transform[J].Journal of the Textile Institute Proceedings&Abstracts,2017,108(2):239-245.
[7]樊养余,李利品,党瑞荣,等.基于随机共振的任意大频率微弱信号检测方法研究[J].仪器仪表学报,2013,34(3):566-572.
[8]Gao S L,Zhong S C,Wei K,et al.Overdamped fractional Langevin equation and its stochastic resonance[J].Acta Physica Sinica,2012,61(10):6.
[9]林敏,黄咏梅.调制随机共振及其在微弱信号检测中的应用[J].传感器与微系统,2006,25(2):81-82.
[10]Calisto H,Humire F R.Stochastic resonance in simple electrical circuits driven by quadratic Gaussian noise[J].IEEE Transactions on Circuits and Systems II:Express Briefs,2017,64(8):937-941.
[11]张莹,王太勇,冷永刚,等.双稳随机共振的信号恢复研究[J].力学学报,2008,40(4):528-534.
[12]王榕生.优化的准正弦平顶调制波PWM过调制新技术[J].电机与控制学报,2014,18(6):9-14.
[13]周耀辉,王芸波,朱维新,等.IIR数字滤波器设计[J].电力自动化设备,2010,30(9):129-131.
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