WO1998040764B1 - Locator of electrically conductive objects - Google Patents
Locator of electrically conductive objectsInfo
- Publication number
- WO1998040764B1 WO1998040764B1 PCT/GB1998/000586 GB9800586W WO9840764B1 WO 1998040764 B1 WO1998040764 B1 WO 1998040764B1 GB 9800586 W GB9800586 W GB 9800586W WO 9840764 B1 WO9840764 B1 WO 9840764B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electromagnetic field
- antennas
- antennae
- detector
- separation
- Prior art date
Links
- 230000005672 electromagnetic field Effects 0.000 claims abstract 17
- 238000000926 separation method Methods 0.000 claims abstract 8
- 238000005259 measurement Methods 0.000 abstract 1
Abstract
In order to locate an electrically conductive object (2), such as a buried cable or pipe, the electromagnetic field generated by a current in the object (2) is detected by a detector having a plurality of spaced apart antennae (3, 4, 5). Those antennae (3, 4, 5) have aerial arrangements which are not all identical. In order for the location of the object (2) to be derivable by measurements by the antennae (3, 4, 5), two or more of the antennae together have at least four aerials (10, 11, 12, 13, 14, 15), with first and second aerials (11, 13, 14) measuring field components in a direction perpendicular to the direction of separation of the antennae, the third aerial (10, 12) measuring field components parallel to the direction of separation, and the fourth aerial (15) measuring the field components in a direction mutually perpendicular to the directions of the field component measured by the first, second and third aerials. Moreover, at least one antennae (3, 4, 5) measures a component in a direction not measured by at least one other antennae (3, 4, 5).
Claims
1. A locator for an electrically conducting underground object which generates an alternating electromagnetic field, having at least three spaced apart antennas and processing means, the said antennas having at least four electromagnetic field detectors, of which the first and second detectors measure electromagnetic field components in a direction perpendicular to the direction of
separation of the first and second antennas, the third
detector measures the electromagnetic field components parallel to the direction of separation of the first and second antennas, and the fourth detector measures the electromagnetic field components in a direction mutually
perpendicular to the directions of the electromagnetic field components measured by the first, second and third detectors; wherein a first one of the antennas is formed by said first and third electromagnetic field detectors,
a second one of the antennas is formed by the second electromagnetic field detector and a third one of the antennas is formed by the fourth electromagnetic field detector, and wherein at least one antenna measures an electromagnetic field component in a direction not
measured by at least one of the other antennas.
16
2 . A locator according to claim 1, wherein the third
antenna is located between the first and second antennas,
and said first, second and third antennas share a common axis .
3. A locator according to claim 1 or claim 2, wherein the second antenna includes a fifth electromagnetic field detector, said fifth electromagnetic field detector measuring electromagnetic field components parallel to the direction of separation of the first and second
antennae .
4. A locator according to any one of the preceding claims wherein the third antenna includes a sixth electromagnetic field detector, said sixth
electromagnetic field detector measuring electromagnetic field components in the direction perpendicular to the direction of separation of the first and second antennas.
5. A detector according to any of the previous claims, in which the antennae are arranged along a receiver which is in the shape of a blade lying substantially in a plane defined by the directions parallel to separation of the antennae, and perpendicular to the direction of separation of the antennae .
6. A method of locating an electrically conducting
underground object, comprising applying an alternating
17
magnetic field to said object, and locating said object using a locator according to any one of claims 1 to 5.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE69826079T DE69826079T2 (en) | 1997-03-07 | 1998-02-25 | LOCALIZER OF ELECTRICALLY CONDUCTIVE OBJECTS |
| US09/180,555 US6268731B1 (en) | 1997-03-07 | 1998-02-25 | Locator of electrically conductive objects |
| EP98907049A EP0898719B1 (en) | 1997-03-07 | 1998-02-25 | Locator of electrically conductive objects |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9704729.4 | 1997-03-07 | ||
| GBGB9704729.4A GB9704729D0 (en) | 1997-03-07 | 1997-03-07 | Locator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998040764A1 WO1998040764A1 (en) | 1998-09-17 |
| WO1998040764B1 true WO1998040764B1 (en) | 1998-10-22 |
Family
ID=10808850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB1998/000586 WO1998040764A1 (en) | 1997-03-07 | 1998-02-25 | Locator of electrically conductive objects |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6268731B1 (en) |
| EP (1) | EP0898719B1 (en) |
| DE (1) | DE69826079T2 (en) |
| GB (1) | GB9704729D0 (en) |
| WO (1) | WO1998040764A1 (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6529006B1 (en) * | 2001-10-31 | 2003-03-04 | Paul Hayes | Method and apparatus for resolving the position and identity of buried conductive bodies |
| US7009399B2 (en) * | 2002-10-09 | 2006-03-07 | Deepsea Power & Light | Omnidirectional sonde and line locator |
| US20040070535A1 (en) * | 2002-10-09 | 2004-04-15 | Olsson Mark S. | Single and multi-trace omnidirectional sonde and line locators and transmitter used therewith |
| US8473209B2 (en) | 2007-03-13 | 2013-06-25 | Certusview Technologies, Llc | Marking apparatus and marking methods using marking dispenser with machine-readable ID mechanism |
| US7640105B2 (en) | 2007-03-13 | 2009-12-29 | Certus View Technologies, LLC | Marking system and method with location and/or time tracking |
| US8060304B2 (en) | 2007-04-04 | 2011-11-15 | Certusview Technologies, Llc | Marking system and method |
| US9086277B2 (en) | 2007-03-13 | 2015-07-21 | Certusview Technologies, Llc | Electronically controlled marking apparatus and methods |
| US8280631B2 (en) | 2008-10-02 | 2012-10-02 | Certusview Technologies, Llc | Methods and apparatus for generating an electronic record of a marking operation based on marking device actuations |
| US8965700B2 (en) | 2008-10-02 | 2015-02-24 | Certusview Technologies, Llc | Methods and apparatus for generating an electronic record of environmental landmarks based on marking device actuations |
| GB2497028B (en) | 2008-10-02 | 2013-07-03 | Certusview Technologies Llc | Methods and apparatus for generating electronic records of locate operations |
| US8442766B2 (en) | 2008-10-02 | 2013-05-14 | Certusview Technologies, Llc | Marking apparatus having enhanced features for underground facility marking operations, and associated methods and systems |
| CA2691780C (en) | 2009-02-11 | 2015-09-22 | Certusview Technologies, Llc | Management system, and associated methods and apparatus, for providing automatic assesment of a locate operation |
| US20110012600A1 (en) * | 2009-07-14 | 2011-01-20 | Connor Martin C | Electromagnetic antenna and method of use for detecting objects |
| CA2710269C (en) | 2009-08-11 | 2012-05-22 | Certusview Technologies, Llc | Locating equipment communicatively coupled to or equipped with a mobile/portable device |
| CA2713282C (en) | 2009-08-20 | 2013-03-19 | Certusview Technologies, Llc | Marking device with transmitter for triangulating location during marking operations |
| CA2710189C (en) | 2009-08-20 | 2012-05-08 | Certusview Technologies, Llc | Methods and apparatus for assessing marking operations based on acceleration information |
| WO2011022102A1 (en) | 2009-08-20 | 2011-02-24 | Certusview Technologies, Llc | Methods and marking devices with mechanisms for indicating and/or detecting marking material color |
| US8220332B1 (en) | 2009-09-19 | 2012-07-17 | Erkan Gunal | Conduit toner and detector |
| USD634655S1 (en) | 2010-03-01 | 2011-03-22 | Certusview Technologies, Llc | Handle of a marking device |
| USD634656S1 (en) | 2010-03-01 | 2011-03-22 | Certusview Technologies, Llc | Shaft of a marking device |
| USD634657S1 (en) | 2010-03-01 | 2011-03-22 | Certusview Technologies, Llc | Paint holder of a marking device |
| USD643321S1 (en) | 2010-03-01 | 2011-08-16 | Certusview Technologies, Llc | Marking device |
| CA2707557A1 (en) * | 2010-06-10 | 2011-12-10 | Enbridge Gas Distribution Inc. | Device, system and method for locating a pipe |
| GB2486219B (en) * | 2010-12-06 | 2014-12-24 | Radiodetection Ltd | A detector for detecting a current carrying conductor |
| GB2486218B (en) * | 2010-12-06 | 2016-09-14 | Radiodetection Ltd | A detector for detecting a current carrying conductor |
| US8676522B2 (en) | 2010-12-06 | 2014-03-18 | Radiodetection Limited | Detector for detecting a current carrying conductor |
| USD684067S1 (en) | 2012-02-15 | 2013-06-11 | Certusview Technologies, Llc | Modular marking device |
| US10042074B2 (en) * | 2014-06-05 | 2018-08-07 | The Charles Machine Works, Inc. | Underground utility line locator and method for use |
| US10459105B2 (en) * | 2014-07-17 | 2019-10-29 | The Charles Machine Works, Inc. | Airborne locator of an underground object |
| US10877176B2 (en) | 2014-07-17 | 2020-12-29 | The Charles Machine Works, Inc. | Airborne locator of an underground object |
| US9857494B2 (en) | 2015-12-01 | 2018-01-02 | Mclaughlin Group, Inc. | System and method for locating an underground utility |
| US11397266B2 (en) | 2018-08-29 | 2022-07-26 | Subsite, Llc | GPS assisted walkover locating system and method |
| CN109730770B (en) * | 2018-12-25 | 2020-08-21 | 大博医疗科技股份有限公司 | Method for reducing volume of magnetic field receiving unit and measuring magnetic field change rate, magnetic field receiving unit, electromagnetic tracking system and application |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4390836A (en) * | 1980-08-11 | 1983-06-28 | Marathon Oil Company | Method and apparatus for the detection of pipeline holidays |
| US4542344A (en) * | 1983-09-02 | 1985-09-17 | Corrosion Logging Service International | Detecting buried pipeline depth and location with electromagnetic triangulation |
| US4806869A (en) * | 1986-05-22 | 1989-02-21 | Flow Industries, Inc. | An above-ground arrangement for and method of locating a discrete in ground boring device |
| EP0503054A1 (en) * | 1990-09-27 | 1992-09-16 | Southern California Gas Company | Apparatus having magnetic field inducing target signal transmitter and position reference transmitter for detecting concealed pipes |
| GB9409003D0 (en) * | 1994-05-06 | 1994-06-22 | Radiodetection Ltd | Locator |
| GB9425331D0 (en) * | 1994-12-15 | 1995-02-15 | Howell Mark I | Location of remote conductors |
-
1997
- 1997-03-07 GB GBGB9704729.4A patent/GB9704729D0/en active Pending
-
1998
- 1998-02-25 WO PCT/GB1998/000586 patent/WO1998040764A1/en active IP Right Grant
- 1998-02-25 EP EP98907049A patent/EP0898719B1/en not_active Expired - Lifetime
- 1998-02-25 US US09/180,555 patent/US6268731B1/en not_active Expired - Lifetime
- 1998-02-25 DE DE69826079T patent/DE69826079T2/en not_active Expired - Lifetime
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