公开(公告)号：WO2013117905A1

公开(公告)日：2013-08-15

申请号：PCT/GB2013/050165

申请日：2013-01-25

Applicant: CRESATECH LIMITED

Inventor： JARVIS, Simon James ,  MUMFORD, Paul ,  MERCHANT, Roger

IPC: G08B13/12 ,  G08B13/14 ,  G08B13/22

CPC classification number: G08B21/185 ,  G08B13/00 ,  G08B13/12

Abstract: A method of detecting disturbance in a metallic conductor (34), comprises the steps of providing an inductance sensing circuit (12) in mechanically and electrically connected to a metallic conductor (34) having a monitorable inductance, tuning the inductance sensing circuit (12) based on an electromagnetic field impressed upon the metallic conductor (34) and an internally generated circuit oscillation, and outputting an alert signal when a tuned output signal from the tuned inductance sensing circuit (12) becomes detuned due to a change in inductance of the metallic conductor (34) by addition to or removal of at least a portion of the metallic conductor (34). A metallic conductor disturbance detection device (10) for such a method is also provided, the device (10) comprising an amplitude and/or frequency tuneable inductance sensing circuit (12), and an alarm circuit (16) for outputting an alarm signal based on an output of the inductance sensing circuit (12).

Abstract translation: 一种检测金属导体（34）中的干扰的方法，包括以下步骤：提供机械地和电连接到具有可监控电感的金属导体（34）的电感感测电路（12），调谐电感感测电路（12） 基于施加在金属导体（34）上的电磁场和内部产生的电路振荡，并且当来自调谐电感感测电路（12）的调谐输出信号由于金属的电感变化而失谐时，输出报警信号 导体（34）通过添加或去除金属导体（34）的至少一部分。 还提供了一种用于这种方法的金属导体干扰检测装置（10），该装置（10）包括幅度和/或可调频电感感测电路（12），以及用于输出基于报警信号的报警电路 在电感感测电路（12）的输出端上。