• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ISA Calgary '89 symposium >ACOUSTIC MONITORING OF PIPELINE LEAKS
【24h】

ACOUSTIC MONITORING OF PIPELINE LEAKS

机译：管道泄漏的声学监测

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A rapid opening of the pipeline to the atmosphere produces an adiabatic pressure wave front that propagates through the gas substantial distances from the leak. Initially, the acoustic wave contains high frequency components. In time, however, the high frequencies attenuate and a wave comprised of less than 10 Hz continues to travel for long distances. The acoustic wave provides an unusual phenomena that appears to be uniquely related to leaks. The uniqueness of the leak is that (1) the pressure drop is from pipeline pressure to atmosphere, and (2) the pressure change is rapid. An acoustic monitor instrument can look into a rigidly defined frequency spectrum from 0.05 Hz to 10 Hz, and can be configured to ignore pulsations or waves that are traveling in one direction and is sensitive to waves caused by the leaks, that are traveling in the other direction. Within seconds it can determine that a leak has occurred and will determine the distance to the leak within +/- 500 feet. Since the acoustic wave travels at the speed of sound, the distance to the leak can be determined by a simple time to wave arrival analysis between two or more monitors. It also provides a useful confirmation of the leak.
机译：管道向大气的快速打开会产生绝热压力波前，该绝热压力波前会通过气体传播到与泄漏点相距很远的距离。最初，声波包含高频分量。但是，随着时间的流逝，高频会衰减，小于10 Hz的波会继续传播很长的距离。声波提供了一种异常现象，该异常现象似乎与泄漏有关。泄漏的唯一性在于：（1）压降是从管道压力到大气压力，（2）压力变化很快。声学监测仪可以查看从0.05 Hz到10 Hz的严格定义的频谱，并且可以配置为忽略沿一个方向传播的脉动或波，并且对由泄漏引起的波敏感，而沿另一个方向传播方向。在几秒钟内，它可以确定发生了泄漏，并将确定到泄漏的距离在+/- 500英尺内。由于声波以声速传播，因此可以通过两个或多个监视器之间的简单波到达时间分析来确定到泄漏的距离。它还提供了有用的泄漏确认信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号