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    ACOUSTIC MONITORING OF A STRUCTURE
    3.
    发明公开
    ACOUSTIC MONITORING OF A STRUCTURE 审中-公开
    声学监测的结构

    公开(公告)号：EP1390738A2

    公开(公告)日：2004-02-25

    申请号：EP02727116.2

    申请日：2002-05-17

    申请人： PURE TECHNOLOGIES LTD

    发明人： PAULSON, Peter, O. ,  MCINTYRE, John

    IPC分类号： G01N29/14

    CPC分类号： G01N29/14 ,  G01N29/38 ,  G01N2291/014 ,  G01N2291/015

    摘要： Discloses a method for monitoring acoustic wave propagation in a structure using a limited number of acoustic sensors. The transfer function of the structure is measured between each sensor and selected locations remote from the sensor using a known source of acoustic waves, such as a Schmidt hammer. Signals from the acoustic sensors are captured when a trigger event is detected; the signals received at the sensors are either compensated by the measured transfer function to estimate the nature of the signal at source, or are compared to characteristics of a compensated reference signal.

    METHOD AND APPARATUS FOR MONITORING OF TENSIONED CABLES
    8.
    发明授权
    METHOD AND APPARATUS FOR MONITORING OF TENSIONED CABLES 失效
    方法和仪器监测紧张电缆

    公开(公告)号：EP0988539B1

    公开(公告)日：2003-02-19

    申请号：EP98928035.9

    申请日：1998-06-11

    申请人： PURE TECHNOLOGIES LTD

    发明人： PAULSON, Peter, O.

    IPC分类号： G01N29/14

    CPC分类号： G01N29/14 ,  G01N2291/011 ,  G01N2291/02872 ,  G01N2291/102 ,  G01N2291/2626

    摘要： Structural cables, for example those formed of a large number of wires and used in suspension bridges or cable-stayed bridges, are monitored by acoustic sensors. Breakage of a wire forming part of the cable gives rise to an acoustic signal. The signal is recorded and its location is found from the relative times at which it arrives at two sensors. Where sensors are located at the cable anchorage or on bands along the length of a suspension bridge cable, they can also monitor slippage of wires relative to the band or cable anchorage. The system preferably uses high resistance sensors and shielded cable. The outputs of different sensors are distinguished by a multiplexing technique or by identifying signals. In another embodiment, sensors placed about the circumference of a cable record signals from wire breaks and the signals are plotted to determine the location of the broken wire within the cross section of the cable.

    DETECTION OF PIPELINE EXPOSURE IN WATER CROSSINGS
    10.
    发明公开
    DETECTION OF PIPELINE EXPOSURE IN WATER CROSSINGS 审中-公开
    水流中管道接触的检测

    公开(公告)号：EP3311204A1

    公开(公告)日：2018-04-25

    申请号：EP16810688.8

    申请日：2016-06-17

    申请人： Pure Technologies Ltd.

    发明人： PAULSON, Peter, O. ,  MCINTYRE, John, A.

    IPC分类号： G01V9/00

    CPC分类号： F17D5/06 ,  F17D1/08 ,  G01B21/085 ,  G01F1/86 ,  G01M3/002 ,  G01V9/005

    摘要： The present invention relates to a method and system of an arrangement of sensors that can be used to detect changes in burial conditions of a pipeline buried under a body of water. The method comprising : obtaining a first temperature of a fluid at a first location; obtaining a second temperature of the fluid at a second location upstream and proximal to the crossing of the body of water; obtaining a third temperature of the fluid at a third location downstream from the crossing of the body of water; generating an estimate of the temperature of the fluid at the third location by establishing the rate of change of temperature of the fluid using the obtained first and second temperature and the distance between the first and second sensors; and identifying pipe exposure when there is a deviation between the estimated temperature and the obtained third temperature.