The enhanced noise nonlinear effects and the detection method of weak vortex signals

PDF(2006 KB)

Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (15) : 168-172.

TANG Xun-jie LIN Min HUANG Yong-mei

Author information +

History +

Abstract

The effects generated by interaction of noise and nonlinear potential field can enhance weak signals. Aiming at the problem that the weak vortex signals generated by low flowrate are difficult to detect, from the viewpoint of enhancing noise nonlinear effects, the noise effects of different nonlinear potential function are compared, a symmetric parabolic potential function is constructed. The theoretical analysis and numerical simulation manifest that the system with symmetric parabolic potential function has a higher SNR. A method to detect weak vortex signals is presented, which uses the enhancement of noise effects of symmetric parabolic system. The detection results of real vortex signal indicates that this method can effectively obtain the characteristic frequency of low flow vortex signals.

Key words

noise / nonlinear / enhance effects / weak vortex signal detection / symmetric parabolic potential function

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

TANG Xun-jie LIN Min HUANG Yong-mei. The enhanced noise nonlinear effects and the detection method of weak vortex signals[J]. Journal of Vibration and Shock, 2016, 35(15): 168-172

References

[1] 邢娟张涛郝松. 管道振动对涡街流量计测量影响的试验研究[J].振动与冲击,2009,28(3):112-115.
XING Juan, ZHANG Tao, HAO Song. Experimental research on measuring accuracy of vortex flowmeter under pipe vibrations[J].Journal of vibration and shock, 2009, 28(3):112 -115.
[2] 江文斌，秦会斌，邵李焕等，基于经典谱估计改进方法的涡街流量计[J].仪器仪表学报,2012,33(1):229-234.
JIANG Wen-bin,QIN Hui-bin,SHAO Li-huan,et al.Vortex flowmeter based on improved classical spectral estimation[J]. Chinese Journal of Scientific Instrument, 2012,33(1):229-234.
[3] 邰永红，沈天飞，李诚.小波滤波法在涡街流量计中的应用[J].电子测量技术,2011,34(11):101-103.
TAI Yong-hong,SHEN Tian-fei,LI Cheng. Application on wavelet filter in vortex flowmeter[J]. Electronic Measurement Technology, 2011,34(11):101-103.
[4] 黄云志，徐科军．基于IIR小波滤波器的涡街流量计数字信号处理系统[J].仪器仪表学报,2007,28(12):2142-2146.
HUANG Yun-zhi，XU Ke-Jun. Digital signal processing system based on IIR wavelet filter for vortex flowmeter[J]. Chinese Journal of Scientific Instrument, 2007, 28(12): 2142-2146.
[5] 郑德智，王帅，樊尚春．涡街流量传感器信号处理方法研究[J].传感技术学报,2009,22(1):80-84.
ZHENG De-zhi, WANG Shuai, FAN Shang-chun. Research on signal processing method of vortex flowmeter [J].Chinese Journal of Sensors and Actuators,2009,22(1):80-84.
[6] 邢娟，张涛.利用涡街流量计测量油水两相流流量[J].仪器仪表学报, 2009, 30(4):882-886.
XING Juan,ZHANG Tao.oil-water two-phase flow measurement using vortex flowmeter[J]. Chinese Journal of Scientific Instrument, 2009, 30(4): 882-886.
[7] 罗清林，徐科军，刘三山.基于快速傅里叶变换的低功耗两线制涡街流量计[J].电子测量与仪器学报,2010, 24(7):692-697.
LUO Qing-lin, XU Ke-jun, LIU San-shan. Vortex flowmeter with low power and two-wires based on FFT [J].Journal of Electronic Measurement and Instrument,2010, 24(7): 692-697.
[8] 郝研, 王太勇, 万剑等. 基于级联双稳随机共振和多重分形的机械故障诊断方法研究[J]. 振动与冲击,2012,31(8): 181-185.
HAO Yan, WANG Tai-yong, WAN Jian, et al. Mechanical fault diagnosis based on cascaded biatable stochastic resonance and multi-fractal [J]. Journal of vibration and shock, 2012, 31(8)：181-185.
[9] 夏均忠，刘远宏，马宗坡等.基于调制随机共振的微弱信号检测研究[J].振动与冲击,2012, 31(3):132-135.
XIA Jun-zhong，LIU Yuan-hong，MA Zong-po,et al.. Research on Weak Signal Detection Based on the Modulated Stochastic Resonance [J].Journal of vibration and shock,2012, 31(3): 132 -135.
[10] Lin M, Huang Y M 2007 Acta Phys.Sin. 56 6173 (in Chinese) [林敏、黄咏梅 2007 物理学报 56 6173].
[11] 梁忠诚，赵瑞.磁致旋光增强效应与微量样品旋光检测方法[J].光学学报,2009，29(8):2221-2224.
LIANG Zhong-cheng, ZHAO Rui.Effect of Magneto-Optic Rotation Enhancement and the Polarimetric Detection of the Small Rotation Angles[J].Acta Optica Sinica,2009, 29(8): 2221-2224.
[12] W.L.Zhao,J.Wang, and L.Z.Wang,Chaos 23,033117(2013).
[13] Wang L Z, Zhao W L, Chen X 2012 Acta Phys. Sin.61 160501( in Chinese) [王林泽、赵文礼、陈璇 2012 物理学报61 160501].
[14] 胡岗.随机力与非线性系统[M].上海:上海科技出版社,1994.
HU Gang. Random force and nonlinear system[M].Shanghai: Shanghai Science and Technology Education Press,1994.
[15] GammaitoniL, HanggiP, Jung P,MarchesoniF. Stochastic resonance[J]. Rev. Mod. Phys, 1998, 70(1): 223-285.
[16] Wang T Y, Leng Y G 2003 Acta Phys. Sin.52 2432( in Chinese) [王太勇、冷永刚 2003 物理学报 52 2432].