MONITORING SYSTEM AND METHOD
    1.
    发明公开
    MONITORING SYSTEM AND METHOD 审中-公开
    监控系统及方法

    公开(公告)号:EP1159594A1

    公开(公告)日:2001-12-05

    申请号:EP00915779.3

    申请日:2000-02-15

    IPC分类号: G01L1/16

    CPC分类号: G01L1/162

    摘要: A system including piezoelectric material (24) wherein a force exerted on the piezoelectric material (24) is determined by subjecting (64) the piezoelectric material (24) to an input signal of sweeping frequency and evaluating the response of the piezoelectric material (24) to the applied (64) signal.

    OPTICAL ISOLATION APPARATUS AND METHOD
    8.
    发明公开
    OPTICAL ISOLATION APPARATUS AND METHOD 审中-公开
    光电隔离装置及方法

    公开(公告)号:EP1260038A2

    公开(公告)日:2002-11-27

    申请号:EP01909075.2

    申请日:2001-02-12

    IPC分类号: H04B10/00

    CPC分类号: H04B10/807 H04B10/801

    摘要: Optical isolation device (10) optically couples and electrically isolates various components on a local source circuit (36) from components on a remote isolated circuit (30). Light source (12) is coupled to opto-electrical detector (16) and opto-electrical sensor (20) is coupled to optical signal generator (18) by optical channel (14). The opto-electrical detector (16) is electrically coupled to remote isolated circuit (30) which is powered by the electricity generated by opto-electrical detector (16) in response to being impinged upon by light (22). Remote isolated circuit (30) is also electrically coupled to optical signal generator (18) which generates optical signals (32) in response to electrical signals received from remote isolated circuit (30). Opto-electrical sensor (20) produces electrical signals in response to being impinged upon by optical signals (32). Thus, remote isolated circuit (30) is completely electrically isolated from, but in communication with and powered by, local source circuit (36).