基于声阵列的电站锅炉水冷壁泄漏定位研究

Study on Location of Water Wall Tube Leakage Based on Acoustic Array

在声学测温系统测点布置的基础上,融入声阵列定位技术,再现声波测温的同时对炉膛水冷壁的泄漏声信号进行实时监测,并进行泄漏点的精确定位.建立炉管泄漏声阵列定位模型,基于到达时间差定位(TDOA)方法和改进的Chan算法进行三维空间声学定位仿真研究,并进行了空旷环境下和炉膛冷态、热态环境下泄漏点的实验研究.结果表明:仿真与实验结果均符合工程要求,该定位算法具有可行性.

By arranging measurement points of acoustic pyrometer and introducing acoustic array orientation technique,simultaneous monitoring of furnace temperature and detection of leak acoustic signals can be achieved so as to accurately loacte the leakage position on water wall tubes.Based on the acoustic array orientation model newly built for tube leakage detection,a 3Dorientation simulation was performed using time difference of arrival(TDOA)method and improved Chan algorithm,and subsequently experimental studies were conducted respectively under open and furnace environment.Results show that both the simulation and experimental results meet engineering requirements,which prove the method to be feasible.