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    • 6. 发明授权
    • Method for inspecting the elements of piping systems by electromagnetic
waves
    • US6008658A
    • 1999-12-28
    • US47932
    • 1998-03-26
    • Kiichi SuyamaTakashi Imaoka
    • Kiichi SuyamaTakashi Imaoka
    • G01N22/02G01R27/26
    • G01N22/02
    • Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection. When either the transmitting antenna or the receiving antenna is moved, the frequency of electromagnetic waves can be a frequency propagated in the pipe or can also be lower than the cut-off frequency. On the other hand, the antenna can be made long and kept in the pipe, to use a frequency lower than the cut-off frequency without moving the antenna
    • 9. 发明授权
    • Method for inspecting the elements of piping systems BT electromagnetic
waves
    • 检查管道系统元素BT电磁波的方法
    • US5990690A
    • 1999-11-23
    • US48115
    • 1998-03-26
    • Kiichi SuyamaTakashi Imaoka
    • Kiichi SuyamaTakashi Imaoka
    • G01N22/02G01R27/26
    • G01N22/02
    • Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection. When either the transmitting antenna or the receiving antenna is moved, the frequency of electromagnetic waves can be a frequency propagated in the pipe or can also be lower than the cut-off frequency. On the other hand, the antenna can be made long and kept in the pipe, to use a frequency lower than the cut-off frequency without moving the antenna.
    • 电磁波在管道系统中通过发射器的发射天线在管道中被驱动,以在管道中传播; 而接收器的接收天线沿着管道移动到管道外部,以接收用于检查管道系统的元件的泄漏的电磁波,并且参考所述位置来检测所检查的管道系统的每个元件的相关位置 的接收天线接收到的电磁波水平成为峰值的接收天线。 要检查的位置是管道中由腐蚀,裂缝等形成的孔以及接头等的损坏部分。还可以沿着管道将发射天线移动到外部,同时布置接收 天线在管道正确的位置。 此外,也可以同步地移动发射天线和接收天线,以实现上述检查。 当发射天线或接收天线都移动时,电磁波的频率可以是在管道中传播的频率,或者也可以低于截止频率。 另一方面,天线可以制造得很长并保持在管道中,使用的频率低于截止频率,而不会移动天线。