基于TMS320VC5402供水管道漏水检测仪设计

摘要

针对当前国内供水管道听音检漏方法可靠性低、抗干扰性差等特点,本文根据供水管道泄漏声信号的频率分布特点及互相关检测法,设计基于TMS320VC5402的漏水检测仪.该仪器采用改进周期图法对管道振动信号进行功率谱估计来判断管道是否存在泄漏.在对漏水点定位时,使用两台漏水检测仪同时采集管道泄漏声信号并用互相关算法计算漏水点的位置.文中给出漏水检测仪的硬件设计框图和软件流程图.整个系统由DSP最小系统、数据采集模块、无线通信模块以及单片机人机接口模块构成.实验结果表明,该仪器具有较好的检漏能力且定位误差在半米以内.%Aiming at the features of current domestic water supply pipeline leakage detection by manual listening, I. E. Low reliability and poor anti-interference, and according to the acoustic signal characteristic of the water supply pipeline leakage and the cross-correlation detection, this paper designs a leakage detector based on the TMS320VC5402. The detector u-ses modified periodogram to estimate the power spectrum of the pipe vibration signal and then determine whether there is a leakage, when positioning on the leakage point, two detectors are used to sample the pipeline's leakage signal at the same time and then cross-correlation algorithm is used to calculate the leakage point. The hardware scheme and the software chart of leakage-measurement system are provided. This detector comprises of DSP minimum system, data acquisition module, wireless communication module and MCU man-machine interface module. The test results show that this detector has a good detection capability and its locate error is within half a meter.