发明名称 |
METHOD OF INSPECTING ABNORMALITY OCCURRING INSIDE PIPE AND APPARATUS FOR PRACTICING THE METHOD |
摘要 |
A method of inspecting an abnormality occurring inside a pipe to be inspected and an apparatus for practicing the method, includes the steps of transmitting an electric wave having a predetermined frequency from an antenna of a transmitter located at a predetermined position inside the pipe, receiving the transmitted electric wave by an antenna of a receiver located at a predetermined position inside the pipe, and discriminating the characteristic of the received electric wave. The characteristic of the received electric wave is the intensity of the electric wave, and an attenuation amount is detected in the first example. On the other hand, the characteristic of the received electric wave is a time required to reflect the transmitted electric wave until it is received by the receiver, and a time interval between transmission of the electric wave and reception of the reflected electric wave is measured in the second example.
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申请公布号 |
CA2121311(A1) |
申请公布日期 |
1994.12.16 |
申请号 |
CA19942121311 |
申请日期 |
1994.04.14 |
申请人 |
TOKYO GAS CO., LTD. |
发明人 |
SUYAMA, KIICHI;FURUSAWA, HAJIME;HOSOHARA, YASUHARU;KOBORI, TAKASHI |
分类号 |
G01B15/00;G01B15/04;G01N22/02;G06T7/60;(IPC1-7):G01N22/02;G01S13/04;G01S11/06 |
主分类号 |
G01B15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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