JPS5542069A - Buried metal pipe detector - Google Patents

Buried metal pipe detector

Info

Publication number
JPS5542069A
JPS5542069A JP11613478A JP11613478A JPS5542069A JP S5542069 A JPS5542069 A JP S5542069A JP 11613478 A JP11613478 A JP 11613478A JP 11613478 A JP11613478 A JP 11613478A JP S5542069 A JPS5542069 A JP S5542069A
Authority
JP
Japan
Prior art keywords
oscillation
metal pipe
coil
frequency
buried metal
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
JP11613478A
Other languages
Japanese (ja)
Inventor
Katsuyoshi Fujikura
Shinichi Kawamura
Hiroshi Ishimura
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable 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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP11613478A priority Critical patent/JPS5542069A/en
Publication of JPS5542069A publication Critical patent/JPS5542069A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To detect only a metal pipe or band of about 20cm or less in length, by integrally securing the oscillation coil of an oscillator and the reception coil of a receiver at a prescribed distance and an angle of 90° to stop resonance.
CONSTITUTION: The oscillation coil 5 and a high-frequency amplifier 4 are combined with each other to cause oscillation with an optional frequency of 200W 500kHz and an appropriate output to carry a modulated wave 3. The electric wave of the oscillation is received by the reception coil 6 at the prescribed distance. Tuning is performed at said frequency. Amplification and detection 8 are effected. The modulated wave is amplified at 9. The presence or absence of the metal piece is detected through sound vibration 10 or a meter pointer 11.
COPYRIGHT: (C)1980,JPO&Japio
JP11613478A 1978-09-21 1978-09-21 Buried metal pipe detector Pending JPS5542069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11613478A JPS5542069A (en) 1978-09-21 1978-09-21 Buried metal pipe detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11613478A JPS5542069A (en) 1978-09-21 1978-09-21 Buried metal pipe detector

Publications (1)

Publication Number Publication Date
JPS5542069A true JPS5542069A (en) 1980-03-25

Family

ID=14679558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11613478A Pending JPS5542069A (en) 1978-09-21 1978-09-21 Buried metal pipe detector

Country Status (1)

Country Link
JP (1) JPS5542069A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658054A (en) * 1985-07-29 1987-04-14 Ortho Pharmaceutical Corporation Process for the preparation of 5,6-dialkoxyanthranilic acids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658054A (en) * 1985-07-29 1987-04-14 Ortho Pharmaceutical Corporation Process for the preparation of 5,6-dialkoxyanthranilic acids

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