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    ACOUSTIC EVENT MONITORING FOR TRIGGERING OF HEALTH SCAN OF A STRUCTURE
    84.
    发明公开
    ACOUSTIC EVENT MONITORING FOR TRIGGERING OF HEALTH SCAN OF A STRUCTURE 审中-公开

    公开(公告)号：EP3410082A1

    公开(公告)日：2018-12-05

    申请号：EP18173721.4

    申请日：2018-05-23

    申请人： Simmonds Precision Products, Inc.

    发明人： ARSENAULT, Tyler ,  CARINI, Peter

    IPC分类号： G01H9/00 ,  G01M11/08

    CPC分类号： G01N25/72 ,  B64F5/60 ,  G01H9/004 ,  G01M5/0016 ,  G01M5/0066 ,  G01M5/0091 ,  G01M11/085 ,  G01N29/2418 ,  G01N2291/2694

    摘要： Apparatus and associated methods relate to generating a trigger signal in response to detection of a triggering acoustic event sensed by one of a distributed network of optical acoustic sensors mechanically coupled to an aircraft structure. Each of the optical acoustic sensors is configured to generate an optical response signal indicative of an acoustic condition detected by the optical acoustic sensor. A controller receives the optical response signals and generates, if a triggering one of the optical response signals is indicative of a triggering acoustic event, a trigger signal. The controller also determines a location of the specific one of the distributed network of optical acoustic sensors that generated the triggering one of the optical response signals. In some embodiments, the trigger signal is sent to a Health & Usage Monitoring System configured to perform a health scan, in response to receiving the trigger signal, of the aircraft structure.

    PHASE BASED SENSING
    90.
    发明授权
    PHASE BASED SENSING 有权

    公开(公告)号：EP2122305B1

    公开(公告)日：2018-06-27

    申请号：EP08718676.3

    申请日：2008-03-10

    申请人： OptaSense Holdings Limited

    发明人： CRICKMORE, Roger, Ian ,  DE FREITAS, Jolyon

    IPC分类号： G01D5/353 ,  G01H9/00

    CPC分类号： G01D5/35303 ,  G01D5/35383 ,  G01H9/004

    摘要： Interrogation of a phase based transducer is performed by comparing the state of the transducer at two points in time to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement can therefore be thought of as a low sensitivity measurement to be used instead of or in combination with the normal signal measurement having higher sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively. For a signal with the majority of its energy centered at approximately 800 Hz, for example, the derivative of that signal will typically be attenuated by 60 dB with a period between the two measurement times of 200 ns.