小波去噪在光纤电压传感器中的应用  

Application of Wavelet De-nosing Algorithm in Optical Fiber Voltage Sensor

作　　者：杨晶[1] 朱宗玖[1] 王帅[1] 韩向锋[1] 

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《通信技术》2009年第3期239-241,共3页Communications Technology

摘　　要：文中介绍了光纤电压传感器的工作原理。并以小波变换为核心,为了改进滤波效果,提高去噪质量,在常规小波阈值去噪方法基础上,提出了基于小波变换的改进阈值函数去噪方法。与传统的硬阈值和软阈值比,该函数不仅易于计算,而且具有优越的数学特性和清晰的物理意义。利用小波变换对所检测到的电压信号进行分析,通过对理论模型进行仿真,证明该方法有很好的去噪效果。This paper tells of the operating principle of optical fiber voltage transducers. It makes use of integrated research ways based on wavelet transform to improve the de-noising effect. Based on conventional de-noising method by threshold filter in wavelet domain, this paper proposes a new method, named adaptive de-noising method by improved threshold function in wavelet domain. The new threshold function has more advantages than the classical soft or hard threshold function, including clear physical meaning and simple mathematical expression. The analysis on detected voltage signals by using the wavelet transform and the simulation by treorctical model indicate that this improved method is effective in denoising.

关 键 词：光纤电压传感器 小波变换 软阂值算法 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]