JPH0516550B2 - - Google Patents

Info

Publication number
JPH0516550B2
JPH0516550B2 JP60178724A JP17872485A JPH0516550B2 JP H0516550 B2 JPH0516550 B2 JP H0516550B2 JP 60178724 A JP60178724 A JP 60178724A JP 17872485 A JP17872485 A JP 17872485A JP H0516550 B2 JPH0516550 B2 JP H0516550B2
Authority
JP
Japan
Prior art keywords
steel pipe
wall
current
ground
magnetic field
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP60178724A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6238370A (ja
Inventor
Hidekazu Makabe
Hiroyuki Hojo
Keisei Sasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Priority to JP60178724A priority Critical patent/JPS6238370A/ja
Publication of JPS6238370A publication Critical patent/JPS6238370A/ja
Publication of JPH0516550B2 publication Critical patent/JPH0516550B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Resistance Or Impedance (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Geophysics And Detection Of Objects (AREA)
JP60178724A 1985-08-14 1985-08-14 鋼管の壁内金属接触検出装置 Granted JPS6238370A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60178724A JPS6238370A (ja) 1985-08-14 1985-08-14 鋼管の壁内金属接触検出装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60178724A JPS6238370A (ja) 1985-08-14 1985-08-14 鋼管の壁内金属接触検出装置

Publications (2)

Publication Number Publication Date
JPS6238370A JPS6238370A (ja) 1987-02-19
JPH0516550B2 true JPH0516550B2 (enExample) 1993-03-04

Family

ID=16053459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60178724A Granted JPS6238370A (ja) 1985-08-14 1985-08-14 鋼管の壁内金属接触検出装置

Country Status (1)

Country Link
JP (1) JPS6238370A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01314990A (ja) * 1988-06-15 1989-12-20 Tokyo Gas Co Ltd 地中埋設管に於ける導電性動体の接触検出方法及び装置

Also Published As

Publication number Publication date
JPS6238370A (ja) 1987-02-19

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