Title:
PIPE INSPECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/005761
Kind Code:
A1
Abstract:
This pipe inspection method includes: a first identification step (S1) for identifying, as a normal section of a pipe, the section from one end (Pa) of the pipe connected to one manhole to a first position (P1) in the pipe where air tightness can be confirmed; a second identification step (S1) for identifying, as a normal section of the pipe, the section from the other end (Pb) of the pipe connected to another manhole to a second position (P2) in the pipe where air tightness can be confirmed; and a third identification step (S3) for identifying, as an abnormal section of the pipe, the section from the first position (P1) to the second position (P2).
Inventors:
SHINTAKU MASASHI (JP)
IRIYAMA YOSHIHIRO (JP)
FUJIMOTO NORIHIRO (JP)
IRIYAMA YOSHIHIRO (JP)
FUJIMOTO NORIHIRO (JP)
Application Number:
PCT/JP2019/027404
Publication Date:
January 14, 2021
Filing Date:
July 10, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G01M3/28
Foreign References:
| JPH09273975A | 1997-10-21 | |||
| JP2002257713A | 2002-09-11 | |||
| JPH08289446A | 1996-11-01 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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