GB2449719A - Preformed narrow inductive vehicle sensing apparatus. - Google Patents
Preformed narrow inductive vehicle sensing apparatus. Download PDFInfo
- Publication number
- GB2449719A GB2449719A GB0716541A GB0716541A GB2449719A GB 2449719 A GB2449719 A GB 2449719A GB 0716541 A GB0716541 A GB 0716541A GB 0716541 A GB0716541 A GB 0716541A GB 2449719 A GB2449719 A GB 2449719A
- Authority
- GB
- United Kingdom
- Prior art keywords
- former
- loops
- loop
- length
- coil
- 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.)
- Withdrawn
Links
- 230000001939 inductive effect Effects 0.000 title claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 38
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims description 20
- 239000004753 textile Substances 0.000 claims description 7
- 239000011236 particulate material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000006261 foam material Substances 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A preformed narrow inductive sensor is disclosed that can be located in a single saw cut on a road surface to detect passing vehicles. The sensor is constructed from one or more coplanar loops 112 mounted on one or more formers 110 where the former has a solid internal structure. In a further embodiment the former may be flexible or have a semi sold structure. In a flexible form the sensor can retain the installation shape and change shape over time to match changes in the installation surface. The loops may be inclined on the former and overlap where there are more than two. Further members may be provided to link several formers throughout the length of the sensor assembly. The former may have channels 611 along the length of the former 110 in which the loop is mounted.
Description
Vehicle Detection Apparatus This invention relates to a transportation
vehicle sensing system for the purpose of detecting the presence of a vehicle. More particularly, it relates to a prefabricated sensor assembly or sub-assemblies specifically preformed for installation into the infrastructure surface below, or otherwise adjacent to, the vehicle. It relates to patent number GB2418515 and to patent application number GB243 1273.
The prior art in patent GB241$515 is to be installed in an installation surface and requires a single groove, saw cut, shaft, duct or other matching receptacle to house the narrow inductive loop. Said installation surface can include non-road locations, such as railways, lramways, car parks, cycle ways, water ways and airports. Application number GB243 1273 includes detection of a vehicle not perpendicularly above the narrow loop assembly.
The present invention describes narrow loop arrangements which are either partially or completely pie-assembled prior to final installation in a roadway.
Examples of embodiment of the invention will now be described including reference to the accompanying drawings.
Figure 1-lA shows the plan view of one or more loops in the sensor assembly.
Figure 1-2A is a sectional view from one end of a coplanar ioop.
Figure I-2B is a sectional end view of an inclined loop.
Figure 1-2C is a sectional end view of an inclined loop.
:. Figure 1 -3A is a sectional end view of coplanar and inclined loops.
Figure 1-4A is a sectional view from one side of the sensor assembly.
Figure l-5A is a plan view illustration of the orientations of the vertical planes. e.. * S
S... . . . Figure 2-lA is a sectional end view representation of a solid former.
*S....
* * Figure 2-lB is a sectional end view representation of a semi-solid former.
Figure 2-iC is a sectional end view representation of a hollow former.
S Figure 2-ID is a sectional end view representation of a semi-rigid former.
*: * Figure 2-1 E is a sectional end view representation of a fluidic former.
Figure 2-IF is a sectional end view representation of a gaseous former.
Figure 2-1G is a sectional end view representation of a textile former.
Figure 3-lA is a sectional end view of elongated members spanning short side.
Figure 3-lB is a sectional side view of elongated members spanning short side.
Figure 3-2A is a sectional end view of elongated members spanning long side.
Figure 3-2B is a sectional side view of elongated members spanning long side.
Figure 3-3A is a sectional end view of elongated members spanning top to bottom sides.
Figure 3-3B is a sectional side view of elongated members spanning top to bottom sides.
Figure 3-4A is a sectional end view of former filled with particulate material or small objects.
Figure 3-4B is a sectional side view of former filled with particulate material or small objects.
Figure 3-5A is a sectional end view of a vertically layered former.
Figure 3-5B is a sectional side view of a vertically or diagonally layered former.
Figure 3-5C is a sectional end view of a diagonally layered former.
Figure 3-6A is a sectional end view of a vertically or diagonally layered former.
Figure 3-6B is a sectional side view of a vertically layered former.
Figure 3-6C is a sectional side view of a diagonally layered former.
Figure 3-lA is a sectional end view of a horizontally layered former.
Figure 3-7B is a sectional side view of a horizontally or diagonally layered former.
Figure 3-7C is a sectional end view of a diagonally layered former.
Figure 4-lA isa side view of a rigid and straight former.
Figure 4-lB is a side view of a rigid and non-straight former.
Figure 4-2A is a side view of a semi-rigid or flexible former in straight arrangement.
Figure 4-2B is a side view of a semi-rigid or flexible lbrmer taking the shape of non-straight installation surface.
:. Figure 4-2C is a side view of a semi-rigid or flexible former re-shapen to a changing * installation surface. **.. * S S...
Figure 5-lA is a sectional side view of a segmented rigid or flexible former in straight *": arrangement.
Figure 5-lB is a sectional side view of a segmented rigid or flexible former in non-straight arrangement. * . S * .
* 5: Figure 6-IA is a sectional end view of loop channels in a former.
Figure 6-2A is a sectional side view of loop channels in a former.
Figure 6-2B is a sectional side view of loop channels in a former.
Figure 7-lA is a side view of a coil on or in the upper or lower surfaces of a former substrate.
Figure 7-lB is a top view of a coil on or in the upper or lower surfaces of a former substrate.
Figure 7-2A is a side view of a coil amund or in one or more edges of a former substrate.
Figure 7-2B is a top view of a coil around or in one or more edges of a former substrate.
Figure 7-3A is a sectional side view of horizontally or vertically stacked former substrate layers.
Figure 7-3B is a sectional end view of horizontally stacked fonner substrate layers.
Figure 7-3C is a sectional end view of vertically stacked former substrate layers.
Figure 7-3D is a sectional end view of diagonally stacked former substrate layers.
Figure 8-lA is a sectional end view of layered coil windings.
Figure 8-lB is a sectional end view of bundled coil windings.
Figure 8-2A is a sectional end view of prclbrmed coil winding on former.
Figure 8-2B is a layout of an unclosed preformed coil winding sheet.
Figure 8-2D is a plan view illustration of a closed preformed coil winding sheet on a former.
Figure 9-3A is an exploded sectional end view of the main component parts of a sensor which can be assembled before or after supply to end user.
Figure 10-lA is a plan view of an angled assembly as arranged in an installation surface.
Figure 10-2A is a plan view of a curved assembly as arranged in an installation surface.
Figure 1-lA shows how ends of the loops 112 in the sensor 100 may be adjacent 113 or loops may overlap 114. Figure l-2A shows a coplanar loop 115 which is a coil whose turns substantially lie on the plane of the installation surface. Inclined loops 116 are shown in Figure l-2B and Figure 1-2C. Figure 1-3A shows one or more coplanar loops 115 and/or one or more inclined loops 116 assembled on one or more formers * S Figure l-4A shows that one or more loops 112 are inclined in the long-side vertical plane * 151 of the assembly, such that the angle of inclination is on the long-side vertical plane 151.
With reference to Figure 1-5A, the long-side vertical plane 151 is defined herein as being * * S substantially along the course of the length of the sensor assembly. The short-side vertical plane 152 is defined herein as being substantially from one long side 153 to the other long side 153 and forms a right angle with the long-side vertical plane 151. Such right angle can be visualised from the plan view of a sensor assembly installed in an installation surlice.
Figure 2-lA shows a solid 211 former 110. Figure 2-lB shows a former 110 with a semi- solid internal structure 212, including lattice, honeycomb, crystalline, or other natural or man-made semi-solid structure; and/or foam materials.
Figure 2-IC shows a hollow or void internal structure 213.
Figure 2-ID shows a semi-rigid or flexible or malleable general structure 214 whose internal siructre is solid and/or semi-solid and/or hollow.
Figure 2-JE depicts a former 110 with internal fluid matter 215. The former 110 also has internal structure which is semi-solid and/or hollow.
Figure 2-IF depicts a former 110 with internal gaseous matter 216. The former 110 also has internal structure which is semi-solid and/or hollow.
Figure 2-16 shows a former 110 with textile internal and/or external structure 217. The textile materials are natural and/or man-made.
The following is a description of a rigid or flexible former 110 whose internal structure consists of various arrangements.
Figures 3-lA and 3-lB illustrate short-side spanning bars or rods or other elongated members 311. Each bar or rod or elongated member 311 consisting of one or more segments throughout its length.
Figures 3-2A and 3-2B illustrate long-side spanning bars or rods or other elongated members 321. Each bar or rod or elongated member 321 consisting of one or more segments throughout its length.
Figures 3-3A and 3-3B illustrate vertical spanning bars or rods or other elongated members 331. Each bar or rod or elongated member 331 consisting of one or more segments throughout its length.
Figures 3-4A and 3-4B illustrate small particulate material or small objects 341. Examples of the particulate materials 341 are granular materials, sand sawdust and fine gravel. Examples :. of the small filling objects 341 are small pebbles, small plastic balls, bean bag filling material and gravel.
Figures 3-5A, 3-SB and 3-SC illustrate long-side spanning substantially vertically 351 or diagonally 352 layered members. Each layered member consisting of one or more segments throughout its length.
S.....
* * Figures 3-6A, 3-6B and 3-6C illustrate short-side spanning substantially vertically 361 or diagonally 362 layered members. Each layered member consisting of one or more segments throughout its length.
*: Figures 3-7A, 3-7B and 3-7C illustrate long-side spanning substantially horizontally 371 or diagonally 372 layered members. Each layered member consisting of one or more segments throughout its length.
Figures 5-IA and 5-I B show a rigid or flexible former 110 with one or more segments 511 throughout its length. Each segment 511 consists of one or more of the internal coil former arrangements described in Figures 2-lA through 2-IG and in Figures 3-IA through 3-7C.
The profile of the former and loop arrangement is described as follows.
Figure 4-IA shows a rigid and straight former 411, whereas Figure 4-18 shows a rigid and non-straight former 412. Figures 4-2A, 4-2B and 4-2C collectively show the changes from one shape to another of a semi-rigid or flexible or malleable former 421. It would fit the profile of the installation surface in which it (the coil former) and the loop arrangement 422 retains physical memory of the shape in which it was installed in the installation surface. The former 423 also changes shape as the installation surface changes in profile over time.
The inductive loop arrangement is described as follows.
Figures 6-lA and 6-2A show a channel arrangement 611 consisting of one or more channels on any side or edge of the former 110 whose purpose would be to encapsulate and restrain, and provide mechanical protection for, one or more partial or complete loops turns.
Figure 6-2B illustrates an alternative in which the channel arrangement 612 may follow the upper edge of the flexible former, or otherwise rigid but non-straight former, with such consistency so as to cause the or each loop coil to substantially follow the installation surface, as the shape of the former follows the profile of the installation surface.
Figures 7-IA and 7-I B show one or more partial or complete loop or loops 112 positioned in, on or around one or more former substrate layers 711. Figures 7-2A and 7-2B show that one or more of the loops 112 tbrmed in this way are oriented substantially: in the plane of the installation surface; or inclined at an angle less that ninety degrees relative to the installation surface.
:. Figures 7-3A, 7-3B, 7-3C and 7-3D show one or more former substrate layers 711 stacked one upon the other whose substantial orientations are horizontal, vertical and diagonal in the * side view and horizontal, vertical and diagonal in the end view. The loop or loops 112 of each layer connected to none or one or more other loop or loops of one or more other former ** substrate layer.
***o.* * * Figure 8-lA shows one or more loops 112 consisting in one or more layers 811 of coil windings. Figure 8-lB shows coil windings bundled together 812.
Figure 8-2A is a preformed winding 813 consisting of: flexible printed circuit; and/or laid up *:: lengths of wire 821 whose ends are joined, on application to the former, giving rise to continuous coil circuit or circuits of greater overall circuit length than the or each laid up wire length. The said lengths of wire 821 are laid upon pro-forming sheets 822 or formers, giving rise to an open circuit coil as shown in Figure 8-2B. This open circuit layout is closed around the former, giving rise to a closed circuit coil 825, as shown in Figure 8-2D, in which End A 823 joins End B 824.
A vehicle detection apparatus is now described in which the main component parts of the sensor can be assembled before or after supply to the end user or installer.
A narrow inductive loop in which the component part or parts of the former 110 and/or the component part or parts of the loop or loops 112 are finally assembled either: at a factory or workshop; at an office location; in transit; in transportation vehicle; in a mobile workshop; at the point of installation; or at other location other than a factory or point of installation. Figure 9-3A illustrates that the former 110 can comprise more than one main part and that each main part can consist of multiple members. The loop coil 112 is shown as, at least, one main part. The or each coil 112 is preformed prior to its arrival at the place of its installation.
The preformed coil may arrive at the place of its installation with or without a temporary or small-form permanent former. The coil 112 is inserted into and/or onto the former 110. The former 110 is assembled to include the coil or coils 112. Any temporary former fixed to the coil part or parts is removed to accommodate final complete assembly with the main former 110 parts. Any small-form permanent former fixed to the coil or coils 112 remains in the final complete assembly, with the exception of any temporary members associated with the small-form permanent fonner. Such temporary members will not form part of the final complete assembly.
The narrow inductive loops 112 may be wound onto the former 110 either: at the point of installation; or at a location other than a factory location or point of installation.
The following is a description of a rigid or flexible inductive loop sensor 100 consisting of :. one or more loops 112 along its length.
Figure 10-lA illustrates an angled assembly 1011 arrangement of one or more installed * * sensors 100 having one or more angles which give changes of direction of the sensor arrangement 100. In the same way, Figure 10-2A illustrates a curved assembly 1021 arrangement of one or more installed sensors 100 having one or more curvatures which give changes of direction of the sensor arrangement 100. **..
* An example of a narrow inductive loop 112 utilising a former substrate layer 711 is a rigid or flexible, single-or multi-layer printed circuit. This substrate 711 would be placed on or in a larger former 110. By stacking a number of such printed circuit substrates 711, a higher number of turns can be achieved. a
Claims (17)
1. A substantially preformed narrow inductive vehicle sensing apparatus for iJistallation in a roadway, trackway, railway or other location or infraslnicture on which transportation vehicles traverse or rest, which consists either separately or as a combination of: two or more ioops whose ends are adjacent or overlap; and/or (inC or more coplanar loops; one or more inclined loops; One OT moie coil formers; one or more icops inclined in the long-side vertical plane: one or more ioops inclined in the short-side vertical plane; a former in which the internal ructure is solid, semi-solid, hollow, rigid or flexible; a former in which the internal structure is fluidic, gaseous or textile; a rigid or flexible former in which the internal structure consists of elongated members adjacent to one another, particulate material or sinai] objects, or layers of material; a rigid or flexible. former whose side-viewed profile Is: either straight or not straight prior to installation, and either stiaight or not straight alter installation;
2. Aformerasinclaj,nljnwhich; a semi-solid structure consists of either lattice, honeycomb, crystalline, other natural or man-made semi-solid structure, or foam materials; and/or a flexible or malleable general structure has internal structure which is solid and/or semi-solid and/or hollow, a former has textile internal and/or external structurç
3. A rigid or flexible former as in claims I and 2 which consists ol short-side spanning bars or rods or other elongated members: each bar or rod or elongated member consisting of one or more segments throughout its length; and/or long-side spanning bars or rods or other elongated members: each bar or rod or elongated member consisting of one or more segments throughout its length; vertical spanning bars or rods or other elongated members: each bar or rod or elongated member consisting of one or more segments throughout its length; long-side spanning substantially vertically or diagonally layered members: each layered member consisting of one or more segments throughout its length; t
S
short-side spanning substantially verticafly or diagonally layered members: each layered member consisting of one or more segments throughout its length; long-side sparming substantially horizontally or diagonally layered members: each layered member consisting of one orinore segments throughout its length.
4. A dorfiexiblefomierasinclaiins l,2and3 wiiichhasoneormore segments throughout the length of the former.
5. A coil formeras claimed in claims 1,2,3 and4 in which the coil former and loop arrangement: retains the shape in which it wes installcd and/or changes shape over time to match changes in the installation sirfiice.
6. Acoilfonnerasclaimedinclaimsl,2,3,4and5inwhichachannelarrangement consisting of one or more channels on any or each side or edge of the former, whose purpose is to encapsulate and restrain all or pert of the loop or loops formed on the fanner.
7. Aooilforasclamedinclaim6inwhiththeobannelaningementfouowstiieupper edge of the former and/or follows the changing or non-changing profile of the installation surface.
8. A vehicle sensing apparatus as claimed in all the preceding claims in which one or more paitial or complete ioops am positioned in, positioned on or positioned around the or each substrate layers such that one or more of the loops thus formed are oriented substantially in the plane of the installation surface and/or relative to tIE installation suthce and/or one or more former substrate layers stacked one upon the other, having substantially horizontal, vertical or diagonal orientations as viewed from an end; loop or loops of each layer connented to loop or loops of one or more other layers.
9.. A vehicle sensing apparatus as in claim 8 in which the or each former substrate layer is a printed circuiL
10. A vehicle sensingapparatus as in claims 1,2,3,4,5,6,7 and 8 in which one or more loop coils are wound in layers; and/or one or more loop coils are wound with the turns bundled together.
Ii -A vehicle sensing apparatus as claimed in all the preceding claims in which the component parts arc finally asscmblcd together at any location.
12. A vehicle sensing apparatus as in claim 11 in which: a temporary fonnei is attached to the loop coil, and which is removed from the loop coil upon assembly of the loop coil onto the main formeç and/or a permanent small former is attached to the loop coil, and which remains attached to the loop coil upon assembly of the ioop coil onto the main former.
13. A vehicle sensing apparatus as claimed in all the preceding claims, consisting of one or more loops along its length, in which: one or more angles exist, causing one or more changes in direction; and/or one or more curvatures exist, causing one or more changes in direction; each change of dizection requires one or more loops along the course of the direction.
14. A vehicle sensing apparatus as in claim 1 and substantially as herein described. *
Amendments to the claims have been filed as follows
1. A substantially prcfcxmed narrow inductive vehicle sensing apparatus for installation in a roadway, trackway, railway or other location or infrastructure on which transportation vehicles traverse or rest, which comists of one or more coplanar loops; one or more coil fbrmers; a former in which the internal structure is solid..
2. A narrow inductive vehicle sensing apparatus as in the preceding claim, in which: one or more inclined loops; one or more loops inclined in the long-side vertical plane; one or more loops inclined in the short-side vertical plane.
*: *: :* two or more loops whose ends are adjacent or overlap; *.S. -. - * ,* s 3. A former as in the preceding claims in which: * * the internal structure is semi-solid, hollow, rigid or flexible; or * the internal structure is fluidic, gaseous or textile. 5..
4. A former as in the preceding claims in which is a rigid or flexible former in which the : COtIits of: * elongated members adjacent to one another, particulate material or small objects; or layers of material 5. A former as in the preceding claims in which is a rigid or flexible former whose side-viewed preflic is: either straight or riot straight prior to installatIon; and either straight or not straight after installation.
6. Afoimerasjncjajm 1 inwhich: a semi-solid structure consists of either lattice, honeycomb, crystalline, other natural or man-made semi-solid structure, or foam matenals a flexible or malleable general structure has internal structure which is solid and/or semi-solid and/or hollow; or a former has textile structure internally or externally or both.
I
7. A rigid or flexible former as m the preceding claims which consists of short-side spanning bars or rods or other elongated members: each bar or rod or elongated member consisting of one or more segments throughout its length; long-side spannhig bars or rods or other elongated members: each bar or rod or dongated member consisting of one or more segments throughout its length; vertical spanning bars or rods or other elongated members: each bar or rod or elongated member consisting of one or more segments throughout its length; long-side spanning substantially vertically or diagonally layered members: each layered member consisting alone or more segments throughout its length; short-side spanning substantially vertically or diagonally layered members: each layered member consisting of one or more segments throughout its length; or long-side spanning substantially horizontally or diagonally layered members: each layered member consisting of one or more segments throughout its length.
8. A rigid or flexible former as in the preceding claims which has one or more segments *..... throughout the length of the former. * **
S... . -. *. 9. A coil former as claimed in the preceding claims in which the coil former and loop arrangement: 1.5..* retainstheshapeinwhithitwasinstaljed;or * * changes shape overtime to match changes in the installation surf ice.
* tO. A coil former as claimed in the preceding claims in which a channel arrangement consisting * of one or more channels cii any or each side or edge of the former, whose purpose is to * . encapsulate and restrain all or part of the loop or loops formed on the former.
Ii. A coil former as claimed in claim 10 in which the channel arrangement follows the upper edge of the former or follows the changing or non-changing profile of the installation surface.
12. A vehicle sensing apparatus as claimed in all the preceding claims in which one or more partial or complete loops are positioned in, positioned on or positioned around the or each substrate layers such that one or more of the loops thus formed arc oriented substantially in the plane of the installation surface or relative to the installation surface; one or more former substrate layei slacked one upon the other, having substantially horizontal, vertical or diagonal orientations as viewed from an end; loop or icops of each layer connected to loop or loops of one or more other layers. up*
13. A vehicle sensing apparatus as in claim 12 in which the or each former substrate layer is a pnnted circuit.
14. A vehicle sensing apparatus as in the preceding claims in which: one or more loop coils axe wound in layers; or one or more loop coils are wound with the turns bundled together.
15. A vehicle sensing apparatus as claimed m all the preceding claims in which the component parts are fmally assembled together.at any location.
16. A vehicle sensing apparatus as in claim 15 in which a temporary former is attached to the loop coil, and which is removed from the loop coil upon assembly of the loop coil onto the main former.
17. A vehicle sensing apparatus as in claim 15 in which a permanent small former is attached to the loop coil, and which remains attached to the loop coil upon assembly of the loop coil onto **..* themainfonner. * **
IS. Avehiclesensing appaxatusas claimed in alithe precedingclauns, consistiagof one or S. S more loops along its length, in which: * ., 1SS* one or more angles exist, using one or more changes in direction; * r one or more curvatures exist causing one or more chenges in direction; or each change of direction requires one or more 1cops along the course of the direction.
*: * 19. A vehicle sensing apparatus as in claim I and substantially as herein described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0616718A GB2431273B (en) | 2005-08-24 | 2006-08-24 | Narrow inclined vehicle sensing region |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0716541D0 GB0716541D0 (en) | 2007-10-03 |
| GB2449719A true GB2449719A (en) | 2008-12-03 |
Family
ID=38599218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0716541A Withdrawn GB2449719A (en) | 2006-08-24 | 2007-08-24 | Preformed narrow inductive vehicle sensing apparatus. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2449719A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000049590A1 (en) * | 1999-02-18 | 2000-08-24 | The University Court Of The University Of Edinburgh | Vehicle detector and classifier |
| US6342845B1 (en) * | 1996-12-03 | 2002-01-29 | Inductive Signature Technologies | Automotive vehicle classification and identification by inductive signature |
| WO2003002945A2 (en) * | 2001-06-29 | 2003-01-09 | Inductive Signature Technologies, Inc. | Inductive sensor apparatus and method for deploying |
-
2007
- 2007-08-24 GB GB0716541A patent/GB2449719A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6342845B1 (en) * | 1996-12-03 | 2002-01-29 | Inductive Signature Technologies | Automotive vehicle classification and identification by inductive signature |
| WO2000049590A1 (en) * | 1999-02-18 | 2000-08-24 | The University Court Of The University Of Edinburgh | Vehicle detector and classifier |
| WO2003002945A2 (en) * | 2001-06-29 | 2003-01-09 | Inductive Signature Technologies, Inc. | Inductive sensor apparatus and method for deploying |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0716541D0 (en) | 2007-10-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |