CA2033304A1 - Objet localisable destine aux utilisations souterraines et methode de localisation connexe - Google Patents
Objet localisable destine aux utilisations souterraines et methode de localisation connexeInfo
- Publication number
- CA2033304A1 CA2033304A1 CA002033304A CA2033304A CA2033304A1 CA 2033304 A1 CA2033304 A1 CA 2033304A1 CA 002033304 A CA002033304 A CA 002033304A CA 2033304 A CA2033304 A CA 2033304A CA 2033304 A1 CA2033304 A1 CA 2033304A1
- Authority
- CA
- Canada
- Prior art keywords
- frequency
- signal
- cable
- marker
- frequencies
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 32
- 239000003550 marker Substances 0.000 claims abstract description 51
- 230000001939 inductive effect Effects 0.000 claims description 13
- 239000013307 optical fiber Substances 0.000 claims description 9
- 239000011888 foil Substances 0.000 claims description 8
- 230000005672 electromagnetic field Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 17
- 230000003287 optical effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000063 preceeding effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US45800289A | 1989-12-28 | 1989-12-28 | |
US458,002 | 1989-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2033304A1 true CA2033304A1 (fr) | 1991-06-29 |
Family
ID=23818961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002033304A Abandoned CA2033304A1 (fr) | 1989-12-28 | 1990-12-27 | Objet localisable destine aux utilisations souterraines et methode de localisation connexe |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH079464B2 (fr) |
CA (1) | CA2033304A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1548674A1 (fr) * | 2003-12-25 | 2005-06-29 | Hitachi, Ltd. | Etiquette interrogeable par radio, procédé de production et appareil pour fabrication d'une telle étiquette |
JP5007043B2 (ja) * | 2005-12-19 | 2012-08-22 | 中国電力株式会社 | ケーブル位置情報管理システム、装置、方法およびプログラム |
-
1990
- 1990-12-26 JP JP41451990A patent/JPH079464B2/ja not_active Expired - Fee Related
- 1990-12-27 CA CA002033304A patent/CA2033304A1/fr not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JPH04128682A (ja) | 1992-04-30 |
JPH079464B2 (ja) | 1995-02-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
FZDE | Dead |