Low-frequency measurement of leakage in enclosures
Low-frequency measurement of leakage in enclosures
复制标题
外壳泄漏的低频测量
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
M. Modera
中科院分区：
文献类型：
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作者：
M. Sherman;M. Modera
各种各样的封闭式结构要么需要，要么不能完全防止从内部空间到外部的泄漏。现有的测量这种泄漏的方法有很大的缺点。我们已经开发了一种设备和技术，允许从外壳内部或外部测量泄漏区域，而不会造成不可接受的干扰。该设备使用低频(1赫兹)声单极子来产生内部压力信号，然后对其进行同步分析，以提供泄漏面积的测量。我们已经成功地将这项技术应用于测量住宅的气密性，并相信它可以很容易地应用于野外、实验室或教室应用。我们目前正在评估为什么我们获得的值平均比通过传统方法获得的值低14%，我们正在调查目前设计的设备显然无法测量大型泄漏。
A wide variety of enclosed structures either require or cannot entirely prevent leakage from their interior space to the outside. Existing methods for measuring such leakage have important disadvantages. We have developed a device and technique that permits leakage areas to be measured from within or without the enclosure without causing unacceptable disturbance. The apparatus uses low‐frequency (1 Hz) acoustic monopoles to generate an internal pressure signal which is then analyzed synchronously to provide a measurement of leakage area. We have successfully applied this technique to measuring air tightness in residential houses, and believe it can be easily adapted for use in field, laboratory, or classroom applications. We are currently evaluating why the values we obtained were, on average, 14% lower than those obtained through conventional methods and we are investigating the apparent inability of the device, as presently designed, to measure large leaks.