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公开(公告)号:US4776206A
公开(公告)日:1988-10-11
申请号:US84264
申请日:1987-08-11
CPC分类号: G01M3/3254
摘要: To leak test a cavity in a test item, a pressurizing gas, at a preselected pressure is applied to the test item and the flow rate of the pressurizing gas during pressurization is recorded. This recorded flow rate is compared with a threshold level based on gas flow signature data for a reference test item. If the recorded gas flow exceeds the threshold level, an excessive leak signal is produced. This leak testing method significantly reduces the time required to perform low flow rate leak detection in large volume test items.
摘要翻译: 为了对测试项目中的空腔进行泄漏测试,将加压气体以预选压力施加到测试项目,并记录加压期间加压气体的流量。 将该记录的流量与基于参考测试项目的气体流动特征数据的阈值水平进行比较。 如果记录的气体流量超过阈值水平,则产生过度的泄漏信号。 这种泄漏测试方法大大减少了在大容量测试项目中执行低流量泄漏检测所需的时间。