论文部分内容阅读
为了减少光纤电流传感器的噪声影响，提高传感器的信噪比，提出了一个基于小波变换理论的数字信号处理系统。文中简介了小波变换的优点及特性，设计了基于小波变换的带通滤波器，组建了一套光纤电流传感器带通滤波系统。该系统能实现１ Ｈｚ 的带通滤波特性，并能根据需要经改变软件参数很方便地实现不同频率、不同带宽的信号提取。这个系统及分析方法对其他参数测量用光纤传感器及其他类型的传感器信号处理系统也是适用的
In order to reduce the noise influence of the optical fiber current sensor and improve the signal to noise ratio of the sensor, a digital signal processing system based on wavelet transform theory is proposed. In this paper, the advantages and characteristics of wavelet transform are introduced. A bandpass filter based on wavelet transform is designed and a set of optical fiber current sensor bandpass filter system is established. The system can achieve 1Hz band-pass filter characteristics, and can be changed according to the need of software parameters are very easy to achieve different frequency, different bandwidth signal extraction. This system and method of analysis is also applicable to other parameter measurement fiber-optic sensors and other types of sensor signal processing systems