JPH0221289A - 埋設管の検知方法 - Google Patents

埋設管の検知方法

Info

Publication number
JPH0221289A
JPH0221289A JP63171200A JP17120088A JPH0221289A JP H0221289 A JPH0221289 A JP H0221289A JP 63171200 A JP63171200 A JP 63171200A JP 17120088 A JP17120088 A JP 17120088A JP H0221289 A JPH0221289 A JP H0221289A
Authority
JP
Japan
Prior art keywords
magnetic field
distribution
alternating current
buried pipe
field distribution
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.)
Granted
Application number
JP63171200A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0555833B2 (en]
Inventor
Yukinobu Miyamoto
幸展 宮本
Yasuhiro Wasa
泰宏 和佐
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.)
NEC Corp
Tokyo Gas Co Ltd
Original Assignee
NEC Corp
Tokyo Gas Co 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 NEC Corp, Tokyo Gas Co Ltd filed Critical NEC Corp
Priority to JP63171200A priority Critical patent/JPH0221289A/ja
Publication of JPH0221289A publication Critical patent/JPH0221289A/ja
Publication of JPH0555833B2 publication Critical patent/JPH0555833B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Geophysics And Detection Of Objects (AREA)
JP63171200A 1988-07-09 1988-07-09 埋設管の検知方法 Granted JPH0221289A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63171200A JPH0221289A (ja) 1988-07-09 1988-07-09 埋設管の検知方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63171200A JPH0221289A (ja) 1988-07-09 1988-07-09 埋設管の検知方法

Publications (2)

Publication Number Publication Date
JPH0221289A true JPH0221289A (ja) 1990-01-24
JPH0555833B2 JPH0555833B2 (en]) 1993-08-18

Family

ID=15918875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63171200A Granted JPH0221289A (ja) 1988-07-09 1988-07-09 埋設管の検知方法

Country Status (1)

Country Link
JP (1) JPH0221289A (en])

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05192314A (ja) * 1991-09-03 1993-08-03 General Electric Co <Ge> 無線周波数電磁界で器具の位置および方向を追跡するための追跡システム
JPH05245129A (ja) * 1991-12-30 1993-09-24 Hamamatsu Photonics Kk 診断装置
JPH06214043A (ja) * 1993-01-13 1994-08-05 Kyushu Denki Kensetsu Koji Kk 地下埋設回線位置検出方法
US8729901B2 (en) 2009-07-06 2014-05-20 Merlin Technology, Inc. Measurement device and associated method for use in frequency selection for inground transmission
JP2016191627A (ja) * 2015-03-31 2016-11-10 大阪瓦斯株式会社 埋設金属の探知用の送信信号の設定方法及びこの設定方法を用いた探知装置
US9739140B2 (en) 2014-09-05 2017-08-22 Merlin Technology, Inc. Communication protocol in directional drilling system, apparatus and method utilizing multi-bit data symbol transmission
US10378338B2 (en) 2017-06-28 2019-08-13 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629286A (ja) * 1985-07-05 1987-01-17 Tokyo Gas Co Ltd 地下埋設物の探知方法及びその装置
JPS62297776A (ja) * 1986-06-17 1987-12-24 Nec Corp 埋設導体の位置検出方法
JPS6335978U (en]) * 1986-08-26 1988-03-08
JPH01123185A (ja) * 1987-11-06 1989-05-16 Tokyo Gas Co Ltd 地中埋設物の磁気的位置検知方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS629286A (ja) * 1985-07-05 1987-01-17 Tokyo Gas Co Ltd 地下埋設物の探知方法及びその装置
JPS62297776A (ja) * 1986-06-17 1987-12-24 Nec Corp 埋設導体の位置検出方法
JPS6335978U (en]) * 1986-08-26 1988-03-08
JPH01123185A (ja) * 1987-11-06 1989-05-16 Tokyo Gas Co Ltd 地中埋設物の磁気的位置検知方法

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05192314A (ja) * 1991-09-03 1993-08-03 General Electric Co <Ge> 無線周波数電磁界で器具の位置および方向を追跡するための追跡システム
JPH05245129A (ja) * 1991-12-30 1993-09-24 Hamamatsu Photonics Kk 診断装置
JPH06214043A (ja) * 1993-01-13 1994-08-05 Kyushu Denki Kensetsu Koji Kk 地下埋設回線位置検出方法
US11047896B2 (en) 2009-07-06 2021-06-29 Merlin Technology Inc. Portable device with electromagnetic noise measurement at multiple frequencies
US10598712B2 (en) 2009-07-06 2020-03-24 Merlin Technology Inc. Portable device with electromagnetic noise measurement for inground transmitter frequency selection
US11802900B2 (en) 2009-07-06 2023-10-31 Merlin Technology Inc. Portable device with removably attachable measuring leg
US20170350930A1 (en) 2009-07-06 2017-12-07 Merlin Technology Inc. Measurement device and associated method for use in frequency selection for inground transmission
US11320474B2 (en) 2009-07-06 2022-05-03 Merlin Technology Inc. Portable device for noise measurement at locations along a path to determine one or more indications
US10520536B2 (en) 2009-07-06 2019-12-31 Merlin Technology Inc. Apparatus for predicting a maximum operational depth for an underground drilling procedure and method
US8729901B2 (en) 2009-07-06 2014-05-20 Merlin Technology, Inc. Measurement device and associated method for use in frequency selection for inground transmission
US11230921B2 (en) 2014-09-05 2022-01-25 Merlin Technology, Inc. Communication protocol in directional drilling system, apparatus and method utilizing multi-bit data symbol transmission
US9739140B2 (en) 2014-09-05 2017-08-22 Merlin Technology, Inc. Communication protocol in directional drilling system, apparatus and method utilizing multi-bit data symbol transmission
JP2016191627A (ja) * 2015-03-31 2016-11-10 大阪瓦斯株式会社 埋設金属の探知用の送信信号の設定方法及びこの設定方法を用いた探知装置
US11008856B2 (en) 2017-06-28 2021-05-18 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods
US10598007B2 (en) 2017-06-28 2020-03-24 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods
US10378338B2 (en) 2017-06-28 2019-08-13 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods
US11352876B2 (en) 2017-06-28 2022-06-07 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods
US11613990B2 (en) 2017-06-28 2023-03-28 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods
US12228030B2 (en) 2017-06-28 2025-02-18 Merlin Technology, Inc. Advanced passive interference management in directional drilling system, apparatus and methods

Also Published As

Publication number Publication date
JPH0555833B2 (en]) 1993-08-18

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