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    • 6. 发明申请
    • SYSTEM AND METHOD FOR TESTING THE INTEGRITY OF POROUS ELEMENTS
    • 用于测试多孔元素完整性的系统和方法
    • WO1994011721A1
    • 1994-05-26
    • PCT/US1993010691
    • 1993-11-08
    • PALL CORPORATIONHOPKINS, Scott, D.SPENCER, Daniel, W.LIPARI, Charles, P.ALTEMOSE, George, A.
    • PALL CORPORATION
    • G01N15/08
    • B01D65/102B01D65/104G01M3/24G01N15/0826G01N29/14G01N29/227G01N29/449G01N2291/02441G01N2291/0245G01N2291/02836G01N2291/02872G01N2291/02881
    • An ultrasonic detection apparatus (1) is disclosed for detecting defects in filters (3). The apparatus (1) operates on a wetted filter (3) and includes a housing (2). The wetted filter (3) divides the housing (2) into an inlet side (7) and an outlet side (8). Both the inlet side (7) and the outlet side (8) may be filled with a gas as with a standard forward flow test apparatus. A microphone (4) is disposed in the vicinity of the wetted filter (3). The microphone (4) receives acoustic signals generated within the chamber (any combination of inlet side (7), outlet side (8), inlet tube (5), or outlet tube (6)) as a result of the increased pressure on the inlet side (7). A signal processing device (9) is also included for analyzing the acoustic signals received by the microphone (4) for determining whether a filter (3) is defective. The invention includes multiple methods for determining whether a filter (3) is defective. One method may include the steps of placing a wetted filter (3) in a test housing (2) to divide the test housing (2) into an inlet side (7) and an outlet side (8), pressurizing the inlet side (7) with gas, measuring both the gas flow and the sound volume on the outlet side (8), and thereby determine whether the filter (3) is defective.
    • 公开了一种用于检测过滤器(3)中的缺陷的超声波检测装置(1)。 装置(1)在润湿过滤器(3)上操作并且包括壳体(2)。 润湿过滤器(3)将壳体(2)分成入口侧(7)和出口侧(8)。 入口侧(7)和出口侧(8)都可以用标准的前向流动试验装置填充气体。 麦克风(4)设置在湿滤器(3)附近。 麦克风(4)由于压力增加而接收在室内产生的声信号(入口侧(7),出口侧(8),入口管(5)或出口管(6)的任何组合) 入口侧(7)。 还包括信号处理装置(9),用于分析由麦克风(4)接收的用于确定滤波器(3)是否有缺陷的声信号。 本发明包括用于确定过滤器(3)是否有缺陷的多种方法。 一种方法可以包括以下步骤:将湿过滤器(3)放置在测试壳体(2)中以将测试壳体(2)分成入口侧(7)和出口侧(8),对入口侧(7 ),测量出口侧(8)上的气流和音量,从而确定过滤器(3)是否有缺陷。