仪表技术与传感器
儀錶技術與傳感器
의표기술여전감기
INSTRUMENT TECHNIQUE AND SENSOR
2015年
7期
94-97
,共4页
声学%漏点定位%在线检测%FPGA%极性相关法
聲學%漏點定位%在線檢測%FPGA%極性相關法
성학%루점정위%재선검측%FPGA%겁성상관법
acoustics%leakage point location%real-time detection%FPGA%polarity correlation algorithm
针对管网泄漏定位运算量大而不易实现在线检测的问题，设计一种运算快速、实时测量的定位方法。以泄漏液体的声学特性为依据，建立测漏模型，将捕获的信号离散化后极化处理，用极性相关法计算渡越时间，从而得到漏点到测点的距离。为验证极性相关法定位的可行性与可靠性，设计声学管网测漏仪。通过实验证明极性相关法能够有效提高相关函数的运算速度，易于在微处理芯片中进行实时分析，实现了工程中管网泄漏的在线定位测量。
針對管網洩漏定位運算量大而不易實現在線檢測的問題，設計一種運算快速、實時測量的定位方法。以洩漏液體的聲學特性為依據，建立測漏模型，將捕穫的信號離散化後極化處理，用極性相關法計算渡越時間，從而得到漏點到測點的距離。為驗證極性相關法定位的可行性與可靠性，設計聲學管網測漏儀。通過實驗證明極性相關法能夠有效提高相關函數的運算速度，易于在微處理芯片中進行實時分析，實現瞭工程中管網洩漏的在線定位測量。
침대관망설루정위운산량대이불역실현재선검측적문제，설계일충운산쾌속、실시측량적정위방법。이설루액체적성학특성위의거，건립측루모형，장포획적신호리산화후겁화처리，용겁성상관법계산도월시간，종이득도루점도측점적거리。위험증겁성상관법정위적가행성여가고성，설계성학관망측루의。통과실험증명겁성상관법능구유효제고상관함수적운산속도，역우재미처리심편중진행실시분석，실현료공정중관망설루적재선정위측량。
Leakage point location of pipelines needs much computation so that it is hard to implement the real-time detection. In order to solve the problem,we designed a leak detect method which can calculate fast to reduce the heavy computation and im-plement the on line measurement.Based on acoustic characteristics of the liquid leakage,a leak detection model was built to con-duct polarization processing after discretizing the captured signal.The distance from leakage point to measuring point can be calcu-lated by using the polarity correlation algorithm to capture the transition? time.Polarity correlation algorithm can effectively improve the arithmetic speed of correlation function and can make it easy to handle real-time analysis in micro-chips.Based on acoustics, we also designed leak detector of pipelines to verify the detecting method of polarity correlation algorithm.The experiment shows that the detector realizes the online detection of leakage pipelines with sufficient precision in engineering.
