DE3403137C2 - - Google Patents

Info

Publication number
DE3403137C2
DE3403137C2 DE19843403137 DE3403137A DE3403137C2 DE 3403137 C2 DE3403137 C2 DE 3403137C2 DE 19843403137 DE19843403137 DE 19843403137 DE 3403137 A DE3403137 A DE 3403137A DE 3403137 C2 DE3403137 C2 DE 3403137C2
Authority
DE
Germany
Prior art keywords
sensors
tube
signals
gap
signal
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
Application number
DE19843403137
Other languages
German (de)
English (en)
Other versions
DE3403137A1 (de
Inventor
Tsugio Kobe Hyogo Jp Sekii
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of DE3403137A1 publication Critical patent/DE3403137A1/de
Application granted granted Critical
Publication of DE3403137C2 publication Critical patent/DE3403137C2/de
Granted 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
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/101—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil
    • G01V3/102—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil by measuring amplitude

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electromagnetism (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
DE19843403137 1983-02-01 1984-01-30 Verfahren und vorrichtung zum erfassen der tatsaechlichen endposition eines metallenen rohres Granted DE3403137A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1570783A JPS59141001A (ja) 1983-02-01 1983-02-01 金属管の有効端末位置検出方法

Publications (2)

Publication Number Publication Date
DE3403137A1 DE3403137A1 (de) 1984-08-02
DE3403137C2 true DE3403137C2 (zh) 1987-09-03

Family

ID=11896235

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843403137 Granted DE3403137A1 (de) 1983-02-01 1984-01-30 Verfahren und vorrichtung zum erfassen der tatsaechlichen endposition eines metallenen rohres

Country Status (2)

Country Link
JP (1) JPS59141001A (zh)
DE (1) DE3403137A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5523753A (en) * 1994-09-12 1996-06-04 Minnesota Mining And Manufacturing Company Vehicle detector system with periodic source filtering

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1210181A (en) * 1968-04-10 1970-10-28 Rank Organisation Ltd Improvements in or relating to electrical filter devices
FR2420119A1 (fr) * 1978-03-17 1979-10-12 Telemecanique Electrique Detecteur de proximite inductif fournissant un signal de sortie proportionnel a la distance
DE2815004A1 (de) * 1978-04-07 1979-10-18 Pfrommer Jun Bruno Flach- oder rundmaschine zur herstellung einer bindungsware
FR2473700A1 (fr) * 1980-01-11 1981-07-17 Jaeger Capteur de proximite
FR2492968A1 (fr) * 1980-10-29 1982-04-30 Petroles Cie Francaise Procede et dispositif de mesure de l'ovalisation d'une conduite
SE426269B (sv) * 1981-05-06 1982-12-20 Bofors Ab Anordning vid detektering av metallforemal

Also Published As

Publication number Publication date
JPS59141001A (ja) 1984-08-13
DE3403137A1 (de) 1984-08-02

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8110 Request for examination paragraph 44
8128 New person/name/address of the agent

Representative=s name: POPP, E., DIPL.-ING.DIPL.-WIRTSCH.-ING.DR.RER.POL.

8125 Change of the main classification

Ipc: G01B 7/34

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee