【摘要】 地下管道漏水的传统检测方法是以声 电转换为基础进行的。该方法的检测灵敏度、深度和距离都受到很大限制。这里介绍一种以声 光转换为基础的检测方法,使用改进的Mach Zehnder干涉仪,以频率直接调制光源,采用单一光纤输出,作为水声信号探头,配合相关运算和能量谱分析,改善系统的信噪比和灵敏度。由于用电脑作数字信号处理,主机与从机之间用无线电通讯,使检测工作更快捷。在地下水管泄漏的定位、检测灵敏度、深度和距离等方面都有明显改善。更多还原

【Abstract】 The traditional method to detecting the leakage of underground waterpipe is basedon the soundelectricity translation. Therefore its sensitivity, detected depth and distance are limited so much.A new method based on the translation of sound to light is introduced. It uses improved MachZehnder interferometer. The frequency of light source is modulated directly. The output optical fiber is single and used as water sound prober.The system includes some softwarecorrelation calculation and energy spectrum analysis to increase its signaltonoise ratio and sensitivity.Using notebook computer to do data signal processing and using radio to communicate between master machine and slave machine, can make water leaking location more quickly. In practice, the system sensitivity, detected depth and distance are improved obviously.更多还原