Acoustic fluid presence/absence detection
    9.
    发明授权
    Acoustic fluid presence/absence detection 有权
    声流体存在/不存在检测

    公开(公告)号:US08120500B2

    公开(公告)日:2012-02-21

    申请号:US12329788

    申请日:2008-12-08

    IPC分类号: G08B21/00 G01F23/296

    摘要: An acoustic sensor detects presence and/or absence of fluid in a fluid delivery medium. The acoustic sensor detects fluid absence based on the difference of the speed of sound between air and a fluid. For example, the acoustic sensor may detect fluid absence based on a phase shift between acoustic signals transmitted through the fluid delivery medium when fluid is present as compared to acoustic signals transmitted through the fluid delivery medium when fluid is absent, e.g., when air or bubbles are present in the fluid delivery medium.

    摘要翻译: 声传感器检测流体输送介质中流体的存在和/或不存在。 声学传感器基于空气和流体之间的声速的差异来检测流体不存在。 例如,当存在流体时,声传感器可以基于通过流体输送介质传输的声信号之间的相移来检测流体不存在,与当流体不存在时通过流体输送介质传播的声信号相比,例如当空气或气泡 存在于流体输送介质中。

    ACOUSTIC FLUID PRESENCE/ABSENCE DETECTION
    10.
    发明申请
    ACOUSTIC FLUID PRESENCE/ABSENCE DETECTION 有权
    声学流体存在/不检测

    公开(公告)号:US20100141460A1

    公开(公告)日:2010-06-10

    申请号:US12329788

    申请日:2008-12-08

    IPC分类号: G08B21/00 G01F23/296

    摘要: An acoustic sensor detects presence and/or absence of fluid in a fluid delivery medium. The acoustic sensor detects fluid absence based on the difference of the speed of sound between air and a fluid. For example, the acoustic sensor may detect fluid absence based on a phase shift between acoustic signals transmitted through the fluid delivery medium when fluid is present as compared to acoustic signals transmitted through the fluid delivery medium when fluid is absent, e.g., when air or bubbles are present in the fluid delivery medium.

    摘要翻译: 声传感器检测流体输送介质中流体的存在和/或不存在。 声学传感器基于空气和流体之间的声速的差异来检测流体不存在。 例如,当存在流体时,声传感器可以基于通过流体输送介质传输的声信号之间的相移来检测流体不存在,与当流体不存在时通过流体输送介质传播的声信号相比,例如当空气或气泡 存在于流体输送介质中。