Acoustic Emission Leak Prevention, Detection and Location in Storage Tank/Pipeline Facilities

摘要EEC-9523383瓦特 随着时间的推移，地下管道和储罐系统可能会发生泄漏，并造成重大的环境破坏。 一些政府机构已经共同认识到这一问题，并正在联合起来，以促进由新泽西理工学院的工业/大学减排合作研究中心（ERRC）和爱荷华州州立大学的工业/大学无损评估合作研究中心（CNDE）联合开展的一项研究和开发计划。 这一协作努力将涉及设想的多大学、多机构项目的广泛范围。 新泽西理工学院的减排研究中心（ERRC）将负责与发起机构EPA、DOE、DoD和NSF的接口。 ERRC正在研究如何利用先前授予的研究成果EEC-9420695修改位于新泽西州爱迪生的EPA UST/管道测试装置的管道系统。 研究人员将与仪器制造商合作，对大规模管道系统中声发射泄漏信号的性质进行表征。 通过与爱荷华州州立大学无损评估中心的研究人员合作，并利用表征数据库，将针对泄漏尺寸和位置精度范围优化传感器放置和信号处理与分析，以获得95%的泄漏位置可靠性。 这些结果将为这两个中心提供另一个数据基础，以测试声发射系统在一些“真实的世界”的运作地点的有效性。 无损评估中心正在研究管道声学传输特性，以澄清该实验室测量信号的解释。 然后，将使用人工声源和人造流体泄漏对室外埋地充水管道进行测试。 这些结果将进行比较和分析，以开发基于渡越时间的泄漏定位算法。 算法将根据实验和理论数据进行测试，以建立单位，性能和准确性作为位置，泄漏率等的函数，然后CNDE研究人员将协助实施声发射系统进行“真实的世界”现场测试，在NJIT和参与机构协调的各个站点。 研究人员完全有资格进行这些研究。 该合作奖第一年的资金由EPA，DOE，DoD和NSF提供。 结构系统和施工过程项目主任Ken P. Chong博士正在提供NSF资金。

ABSTRACT EEC-9523383 WATTS Underground pipelines and storage tank systems can develop leaks over time and cause significant environmental damage. A number of Government agencies have jointly recognized this concern and are joining together to facilitate a research and development program to be undertaken jointly by the New Jersey Institute of Technology's Industry/University Cooperative Research Center for Emission Reduction (ERRC) and Iowa State University's Industry/University Cooperative Research Center for Nondestructive Evaluation (CNDE). This collaborative effort will address the envisaged broad scope of a multi-university, multi-agency project. The Emission Reduction Research Center (ERRC) at New Jersey Institute of Technology will be responsible for the interface with the sponsoring agencies, EPA, DOE, DoD, and NSF. ERRC is studying how to modify the pipeline systems at the EPA UST/Pipeline Test Apparatus in Edison, NJ utilizing the research results of a prior award, EEC-9420695. Researchers in collaboration with instrument manufacturers will characterize the nature of acoustic emission leak signals in the large scale pipeline systems. Working collaboratively with researchers from the Center for Nondestructive Evaluation at Iowa State University and utilizing the characterization data base, sensor placement and signal processing and analysis will be optimized for the range of leak size and location precision necessary to obtain a 95% reliability for leak location. These results will provide another data base for the two Centers to test how effective the acoustic emission system will be in a number of "real world" operational sites. The Center for Nondestructive Evaluation is studying the pipeline acoustics transmission characteristics to clarify interpretation of measured signals in this laboratory. Tests will then be made on an outdoor buried, water filled pipeline using an artificial acoustic source and manufactured fluid leaks. These results will be compared and analyzed to develop transit time-based leak location algorithms. The algorithms will be tested against the experimental and theoretical data to establish units, performance and accuracy as a function of location, leak rate, etc. The CNDE researchers will then assist in implementing the acoustic emission system for "real world" field tests, at various sites coordinated by NJIT and the participating agencies. The researchers are fully qualified to perform these studies. Funding for year one of this collaborative award is being provided by EPA, DOE, DoD, and NSF. Dr. Ken P. Chong, Program Director, Structural Systems and Construction Processes Program, is providing the NSF funds.