JPS56126787A - Measurement of depth of underground body - Google Patents

Measurement of depth of underground body

Info

Publication number
JPS56126787A
JPS56126787A JP2974180A JP2974180A JPS56126787A JP S56126787 A JPS56126787 A JP S56126787A JP 2974180 A JP2974180 A JP 2974180A JP 2974180 A JP2974180 A JP 2974180A JP S56126787 A JPS56126787 A JP S56126787A
Authority
JP
Japan
Prior art keywords
signal
return current
underground
magnetic field
depth
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.)
Pending
Application number
JP2974180A
Other languages
Japanese (ja)
Inventor
Yasuo Koyanagi
Takeo Yamada
Hiroyuki Hojo
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
NKK Corp
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP2974180A priority Critical patent/JPS56126787A/en
Publication of JPS56126787A publication Critical patent/JPS56126787A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current
    • G01V3/06—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current using ac

Abstract

PURPOSE:To arrange so that the depth of an underground object can be measured with high precision, with the clarification of a channel for a return current, by providing an electric channel for a return current on the ground in parallel with an underground object such as gas pipe, etc. CONSTITUTION:An electric channel 13 for a return current is laid on the ground 5 in parallel with an underground object 1 and a location where a detection coil 9 inside a detection rod 8 is at a right angle with a composite magnetic field of a magnetic field by an underground located object 1 and a magnetic field by an electric channel 13 for a return current, is sought. That is, a signal of induction electromotive force from the detection coil 9 is detected by means of a receiver 21 and then is supplied to an arithmetic processing device 22. In the meantime, to this arithmetic processing device 22, a signal of set inclination angle from a detection rod 8 and a signal of the movement distance of a truck 17 from a ragne finder 20 are supplied. Following this process, the buried depth of an underground object 1 is operated under an arithmetic formula based on a signal of movement distance when a signal of induction electromotive force is zero and a signal of set inclination angle.
JP2974180A 1980-03-11 1980-03-11 Measurement of depth of underground body Pending JPS56126787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2974180A JPS56126787A (en) 1980-03-11 1980-03-11 Measurement of depth of underground body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2974180A JPS56126787A (en) 1980-03-11 1980-03-11 Measurement of depth of underground body

Publications (1)

Publication Number Publication Date
JPS56126787A true JPS56126787A (en) 1981-10-05

Family

ID=12284520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2974180A Pending JPS56126787A (en) 1980-03-11 1980-03-11 Measurement of depth of underground body

Country Status (1)

Country Link
JP (1) JPS56126787A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100879876B1 (en) 2008-03-06 2009-01-22 신상열 The instrumentation apparatus for the settlement of the reclaimed ground or the measure of soil
JP2016003995A (en) * 2014-06-18 2016-01-12 株式会社コベルコ科研 Method for inspecting thickness reduction of border portion of partially buried structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100879876B1 (en) 2008-03-06 2009-01-22 신상열 The instrumentation apparatus for the settlement of the reclaimed ground or the measure of soil
JP2016003995A (en) * 2014-06-18 2016-01-12 株式会社コベルコ科研 Method for inspecting thickness reduction of border portion of partially buried structure

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