JPS6161074B2 - - Google Patents
Info
- Publication number
- JPS6161074B2 JPS6161074B2 JP52127823A JP12782377A JPS6161074B2 JP S6161074 B2 JPS6161074 B2 JP S6161074B2 JP 52127823 A JP52127823 A JP 52127823A JP 12782377 A JP12782377 A JP 12782377A JP S6161074 B2 JPS6161074 B2 JP S6161074B2
- Authority
- JP
- Japan
- Prior art keywords
- buried metal
- metal pipe
- changeover switch
- current
- pipes
- 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
Links
- 239000002184 metal Substances 0.000 claims description 37
- 238000001514 detection method Methods 0.000 claims description 18
- 230000010355 oscillation Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010292 electrical insulation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 240000000491 Corchorus aestuans Species 0.000 description 1
- 235000011777 Corchorus aestuans Nutrition 0.000 description 1
- 235000010862 Corchorus capsularis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12782377A JPS5460958A (en) | 1977-10-24 | 1977-10-24 | Buried metal pipe detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12782377A JPS5460958A (en) | 1977-10-24 | 1977-10-24 | Buried metal pipe detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5460958A JPS5460958A (en) | 1979-05-16 |
| JPS6161074B2 true JPS6161074B2 (th) | 1986-12-24 |
Family
ID=14969539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12782377A Granted JPS5460958A (en) | 1977-10-24 | 1977-10-24 | Buried metal pipe detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5460958A (th) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0184779U (th) * | 1987-11-30 | 1989-06-06 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6437866B2 (ja) * | 2015-03-31 | 2018-12-12 | 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS499388B1 (th) * | 1968-05-25 | 1974-03-04 |
-
1977
- 1977-10-24 JP JP12782377A patent/JPS5460958A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0184779U (th) * | 1987-11-30 | 1989-06-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5460958A (en) | 1979-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6407550B1 (en) | Line locator with accurate horizontal displacement detection | |
| US6130539A (en) | Automatic gain control for a line locator | |
| US4024468A (en) | Induction balance metal detector with inverse discrimination | |
| US5444364A (en) | Circuit tracer having an electric field sensor, a differential electric field sensor and an inductive sensor | |
| US4295095A (en) | Apparatus and method for detecting the location of metallic objects having alternating current passing therethrough | |
| US4427942A (en) | Concealed electrical conductor detecting system | |
| JPS631524B2 (th) | ||
| US4843324A (en) | Apparatus for determining the location and distance to a concealed conductive structure | |
| JP2858784B2 (ja) | 受動共振マーカにより埋設された電気導体を位置決めする方式および方法 | |
| CN100510764C (zh) | 查找电线及电缆故障点的方法及装置 | |
| JPS6161074B2 (th) | ||
| US4249630A (en) | Plow guidance system | |
| US2769868A (en) | Line fault detector | |
| JP3072304B2 (ja) | 金属探知方法 | |
| GB1577742A (en) | Apparatus for and methods of electromagnetic surveying | |
| RU2143703C1 (ru) | Способ определения места однофазных замыканий в кабельных линиях, проложенных в земле | |
| JP3124475B2 (ja) | 被識別対象物の識別方法及びその装置 | |
| US2586781A (en) | Line fault detector | |
| US2614151A (en) | Means for determining the resistance of insulated joints | |
| JP3097896B2 (ja) | 配線の電流ルート探索方法 | |
| SU930168A1 (ru) | Способ определени места замыкани в кабеле | |
| JPS5858488A (ja) | 地下埋設物探知装置 | |
| SU938214A1 (ru) | Устройство дл определени места повреждени изол ции магистральных трубопроводов | |
| JPH0252829B2 (th) | ||
| JPH074584Y2 (ja) | 絶縁抵抗測定装置の検出変流器 |