GB2510242A - Communication of speed limit from a traffic sign to a vehicle using reflective optical filter - Google Patents
Communication of speed limit from a traffic sign to a vehicle using reflective optical filter Download PDFInfo
- Publication number
- GB2510242A GB2510242A GB201321068A GB201321068A GB2510242A GB 2510242 A GB2510242 A GB 2510242A GB 201321068 A GB201321068 A GB 201321068A GB 201321068 A GB201321068 A GB 201321068A GB 2510242 A GB2510242 A GB 2510242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vehicle
- sign
- speed limit
- communication system
- traffic
- 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- Withdrawn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
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
- G08G1/096783—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a roadside individual element
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
- G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
- G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
- G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
- G08G1/096758—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
Abstract
Traffic speed limit sign 1 comprises reflective optical filter 8. Light emitted by a light emitting and receiving component inside an oncoming vehicle is detected by said reflective optical filter. Light reflected from said filter is representative of the speed limit of said sign, e.g. its wavelength may depend on the speed limit. The reflected light is received by said component in order to display information (e.g. the speed limit) inside said vehicle. The sign may be powered by solar panel on its rear and the reflective optical filter may be detachable from the sign. Alternatively a speed sign may comprise a communication system which is activated by detection of an oncoming vehicle (e.g. detection of vehicle motion), causing transmission of a signal (e.g. contain speed information) to the vehicle in order to display information inside it.
Description
Intellectual Property Office Applicathin No. GB1321065.7 RTM DaL:20May2014 The following terms are registered trade marks and should he rcad as such wherever they occur in this document: ZigBee. Bluetooth Inlelleclual Property Office is an operaling name of the Pateni Office www.ipo.gov.uk LfficSedUmjtsgi,
Field of the Invention
is The invention relates to traffic speed Umit signs, communication systems and methods of communication.
ctground to the I3IJS1Qn The dosest prior art known to the applicant is satellite navigation te.chnology which is able to inform drivers of the speed limit of the road they are drMng on. However, the disadvantage of this is that this technology requires frequent updates from the internet so that speed Vmft changes are kept current. These systems cannot take account of temporay speed limit changes such as changes due to road works or public events.
Other prior art known to the applicant are traffic signs that use radar to detect oncoming vehicles and a warning is given to an over speed vehicle to remind a driver of the speed limIt, The disadvantage with these signs is that the warning is observed only outside of the oncoming vehicle.
Other prior art, EP1422618, concerns an autonomous communication stem, having a transmitter position at a fixed point and sending positional information to a vehicle mounted receiver within the range of operation of the latter. The system has means for detecting the presence and/or direction of movement of the receiving device defining a detection zone and means adapted to broadcast messages comprising information related to the location, The disadvantage of this configuration is that it requires two terminals; the s diffusion of the message occurring after the vehicle has passed a detection terminal and before the vehicle arrives at a diffusion terminaL Other prior art US4B1 682 1, concerns a road safety installation with emission of sound messages for every pe of signalling panel fixed along a road. The disadvantage of this configuration is that it emits only sound messages to the driver of a vehicle, mmafvention is In the first broad independent aspect., the invention provides a communication system comprising a detector positioned on a speed Limit sign for detection of an oncoming veFucle, sad detector bemg a refLectve opticaL hiter, and a light emttmg and recemng component Located inside said oncoming vehicle; wherein the emission of light from said emitting and receiving component is detected by said detector; and reflected Light from sad detector s subsequently recerved as a sgnal by sac comporent rn order to dssplay information inside said vehicle; said reflected light being representative of the speed Limit of said sign.
This system provides the driver of a vehicle with clearer speed Limit information when the vehicle is passing a particular area, Additionally, the speed limit can be kept up to date to take account of changes due to road works or public events as the reflective optical filter can be changed to represent a different speed limit of the sign. The clearer speed limit information ensures that a driver is more Likely to respond to a change in speed Limit of a road.
Preferably, said reflective optical filter is detachable from s&d sign. This provides the advantage that the niter can be strughtforwardly placed on the front face of the sgn unobtrusively and changed easily if required.
Preferably, said speed limit sign is powered by a solar paneL located at the rear of said sign.
This configuration provides a low maintenance, preferabLy mono lithic and compact sign.
in a second broad independent aspect, the invention provides a method of cornrnunkation s between a traffic speed limit sign and an oncoming vehkle, comprising the steps of; emitting light from a vehicle towards a traffic speed limit sign; detection of Ught by a refLective optical filter on said sign; reflecting tight back towards said vehicle at a specific wavelength dependent on the speed Limit of said sign; receiving said reflected Light as a signal inside said vehicle; and displaying information inside said vehicle representative of iv the speed limit of said sign.
This is advantageous because the reflected light, representative of the speed Limit of the sign, allows the driver of said vehicle to be more aware of the speed information of the road This s espenaPy ¶gnEhcant where the speed bma changes frequently along a route is or if the speed limit is temporay due to changes such as road works or public events as the reflective opticat filter can be changed. Communication received inside said vehicle will be advantageous over speed limit information displayed outside of the vehicle.
In a third broad independent aspect the invention provides a traffic speed limit sign comprising a communication system; said communication system incorporating a detector for detection of an oncoming vehicle; and a transmitter for communicating to said vehicle; whereby the motion of said vehicle toward said traffic sign activates said communication system; whereby activation of said communication system causes said transmitter to transmit a signal to said vehicle in order to display information inside said vehicle, The advantage of this sign is that it provides the driver of a vehicle with clearer speed Limit nformanon when the vehcle s passing a particular area Addaonally, the speed Limit can be kept up to date to take account of changes due to road works or pubUc events. The clearer speed Limit inFormation ensures that a driver is more likely to respond to a change in speed limit of a road.
Preferably, said traFic speed limit gn is further powered by a so1a 9anel that is located at the rear of the sign This configuration provides a low maintenance, preferably monolithic and compact sign.
Preferably, said transmitter for commurdcating to said vehde is located at the rear of said sign. This provides the means of transmitting a signal to said vehicle once ft has passed said sign in order to be received and displayed inside said vehicle whilst ft is inside the designated speed limit zone.
Preferably, a commumcanon system comprises a traffic speed bmt sgn and a vehcle which comprises a receiver, for receffing said signal and a display unit for displaying information inside said vehicle following the receipt of the signaL This configuration is advantageous because it enables the communication of speed information between the traffic speed limit sign and an oncoming vehicle so that speed information can be displayed inside said oncoming vehicle.
is In a fourth broad mdependent aspect, the rventon pwvdes a mttthoc of commurucauon between a traffic speed limit sign and an oncoming vehicle, comprising the steps of: detecvng an oncomng vehcle, transmthng a sgnaL cortanmg speed nformaton, to a receiver of said vehicle; arid displaying the transmitted signal inside said vehicle. This is advantageous because the transmission of a signal incorporating speed information, to an oncoming vehicle allows the driver of said vehicle to more easily view the speed information of the road. This is especially significant where the speed information is temporary due to changes such as road works or public events, Communication received inside said vehicle wilt be advantageous over speed Limit information displayed outside of the vehicle.
Figure 1 shows the front of a traffic speed Limit sign.
Figure 2 shows the back of a traffic speed limit sign.
Agure 3 shows the front of a traffc speed bm sgn accorchng to another aspect of the invention.
Deta;k.d r2sd.pticnatheflg Figure I shows a traffic speed imit sign indicated by 1, which incorporates a head unit 2 and a support post 3. Said head unit comprises a front fac.e, facing towards an oncoming vehicle, and a back face, facing in the opposite direction to the front face. in this embodiment, the front face incorporates a visual indicator comprising LEDs 7. Said visual indicator illustrates the speed limit of a particular area of road. joining said front and back faces s at least one panel compnsng the top, bottom and sides of sad head 2na Where the front and back faces of the head unit are circular, only one side panel will be present.
w Where the front and back faces of the head unit are triangular, there will be three side panels. Where the front and back faces of the head unit are square, there will be four side panels The traff c speed hmt sgn also incorporates a support post 3, Located at the bottom of said head unit, Said support post fits into said head unit and extends down towards the ground so a may offer support to the traffic speed ma sgn The head unt ncorporaies a detector 1 The detector s postoned so that t laces n the arne as sad front face of the head uit The detector s ostoned so that, n use, a ran detect a vehicle moving towards the front face of the traffic speed Limit sign.
Figure 2 shows a traffic speed limit sign i from the rear, facing towards the back face. The traffic speed limit sign incorporates a transmitter 5, and a solar panS 6. The commumcaton system mcororated nto sad traffic speed hma sgi s powered by sad solar paneL Power may be stored in a battery or by similar means. Said solar panel is attached to and is the same shape as the back face of said head unit and faces away from said sgn Sa d transn'utter 5, s located at the rear of sad sgn It faces rn the same direction as the back face of said head unit so that ft may effectively communicate with vehicLes that have passed said sign. Detection of an oncoming vehicle by said detector 4 causes the proliferation of a signal, containing speed information, from the transmitter 5.
Communication of said signal may he proliferated via radar, Bluetooth, radio-frequency identification (REID), Zigke or other wireless methods. The communication of said signal ac is directed towards a receiver incorporated in said oncoming vehicle. The receiver subsequently send.s the received information to a display unit within the vehicle. The display unit may comprise a satellite navigation system or heads-up-display unit, Figure 3 shows the front of a traffic speed limit sign 1 according to another broad aspect of the invention. In this embodiment the detector is a reflective optical filter 8, having a number of shallow grooves on its front surface to reflect a specific frequency of Light, which is positioned on the front face of the head unit 2, The reflective optical fiLterS is s detachable from the front face of the sign. In one embodiment, the filters has an adhesive on its sign abutting suriace (not shown) so that it can be str&ghtfowardLy pLaced on the front face of the sign unobtrusively and changed easily if required. The filters can be in the form of a small circular disc, although it could comprise any shape or size that is fixable to a speed hmrt sgn The fdter S can be ftxed to a standard reflectve speed hrnt sgn or an LED activated sign, such as that shown in figures 1 and 3.
An oncoming vehicle (not shown) incorporates a Light emitting and receiving component which is directed towards the sign 1, In use, tight is emitted towards the front face of the sign 1 When the emitted hght is detected by the reflective optical fitter 8 a speafc wavelength of light is reflected back to the vehicle and is received by the emitting and receMng component of the vehicle. This wavelength of light indicates the speed limit of the sign 1 e g 30mph Dfferent soeea hriit sgns have diffenng reflective optical filters As a result, the wavelength reflected back to a vehicle is representative of the particular speed Limit of the sign. When the reflected tight is received by the emitting and receiving component of the vehicle, the component subsequently sends the received information to a display unit within the vehicle, The display unit may comprise a satellite navigation system or headsup4isplay unit. 3°
Claims (8)
1. A communication system comprking a detector positioned on a speed limit sign for detection of an oncoming vehicle; said detector being a reflective optical filter; and a light emitting and receiving component located inside said oncoming vehicle; wherein the emission of light from said emitting and receiving component is detected by said detector; and reflected Light from said detector is subsequently received as a signal by said component in order to display information inside said vehicle; said reflected tight being representative of the speed limit of said sign.
2, A communication system according to claim 1, wherein said reflective optical filter is detachable from said sign.
3 A comrnurKaton system accordrng to cther clam I or clam 2, wherem szud speed Omit sign is powered by a solar paneL located at the rear of said sign.
4. A method of communication between a traffic speed Limit sign and an oncoming vehicle, comprising the steps of: emftting light from a vehicte towards a traffic speed Omit sign; detection of tight by a reflective optical filter on said sign; reflecting light back towards said vehicle at a specific wavelength dependent on the speed limit of said sign; receiving said reflected light as a signal inside said vehicle; and displaying information inside said vehicle representative of the speed limit of said sign.
5. A communication system substantially as hereinbefore described and/or illustrated in any appropriate combination of the accompanying text and/or figures.
6. A traffic speed limit sign comprising a communication system; said communication system incorporating a detector for detection afar oncoming vehicle; and a transmitter for communicating to said vehicle; whereby the motion of said vehicle toward said traffic sign activates said communication system; whereby activation of said communication system causes said transmitter to transmit a signai to said vehicle in order to display information inside said vehicle.
7. A traffic speed limit sign according to claim 6, wherein said communication system S is powered by a solar panel, located at the rear of said sign.
8. A traffic speed limit sign according to either claim 6 or claim 7, wherein said transmitter for commurilcating to said vehicle is located at the rear of said sign.lv 9 A communcahon system compnsmg a traffic speed hmt sgn n accordance wfth any of the preceding claims; and a vehicle which comprises a receiver, for receiving said signal and a display unit for displaying information inside said vehicle following the receipt of the signaL is 10. A method of communication between a traffic speed limit sign and an oncoming vehicle, comprising the steps of: detecting an oncoming vehicle; transmitting a signai containing speed information, to a receiver ol said vehicle; and displaying the transmitted signal!nside said vehicle, 11. A traffic speed limit sign substantially as hereinbefore described and/or illustrated in any appropriate combination of the accompanying text and/or figures.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201221569A GB2508393A (en) | 2012-11-30 | 2012-11-30 | Traffic speed limit sign which detects an approaching vehicle and transmits speed information for display to driver as he passes behind the sign |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201321068D0 GB201321068D0 (en) | 2014-01-15 |
| GB2510242A true GB2510242A (en) | 2014-07-30 |
Family
ID=49979514
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201221569A Withdrawn GB2508393A (en) | 2012-11-30 | 2012-11-30 | Traffic speed limit sign which detects an approaching vehicle and transmits speed information for display to driver as he passes behind the sign |
| GB201321068A Withdrawn GB2510242A (en) | 2012-11-30 | 2013-11-29 | Communication of speed limit from a traffic sign to a vehicle using reflective optical filter |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201221569A Withdrawn GB2508393A (en) | 2012-11-30 | 2012-11-30 | Traffic speed limit sign which detects an approaching vehicle and transmits speed information for display to driver as he passes behind the sign |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2508393A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104149713A (en) * | 2014-08-01 | 2014-11-19 | 青岛盛嘉信息科技有限公司 | Motor vehicle plate management method |
| CN107111944A (en) * | 2014-12-30 | 2017-08-29 | 3M创新有限公司 | The label of vehicle identification system identification |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111275974B (en) * | 2020-02-25 | 2021-08-10 | 长安大学 | Method for calculating dynamic speed limit recommended value of expressway construction area |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4816827A (en) * | 1986-04-14 | 1989-03-28 | Essacq Baloutch | Road safety installation with emission of sound messages |
| DE29520819U1 (en) * | 1995-03-03 | 1996-04-11 | Rolli Engelbert | Device for limiting the driving speed of vehicles |
| DE19756706A1 (en) * | 1997-12-19 | 1999-06-24 | Ifak Inst Fuer Automation Und | Obstacle or road sign detection and identification device for road vehicle |
| EP1422678A2 (en) * | 2002-11-20 | 2004-05-26 | France Telecom | Communication system with a vehicle |
| DE10248968A1 (en) * | 2002-10-17 | 2004-06-03 | Deutsche Telekom Ag | System for transmitting information such as from a road sign to a vehicle using a sensor and a receiver |
| US20050280552A1 (en) * | 2004-06-16 | 2005-12-22 | Dipiazza Gerald C | System and method to wirelessly communicate information between traffic control signs and vehicles |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2620253B3 (en) * | 1987-09-07 | 1989-12-01 | Baloutch Essacq | ROAD SAFETY IN A VEHICLE THANKS TO INFRARED RADIUS WITH OR WITHOUT SOUND DETECTOR |
| US8350723B2 (en) * | 2010-01-29 | 2013-01-08 | Guesswhat, Llc | Method and system for improved traffic signage |
-
2012
- 2012-11-30 GB GB201221569A patent/GB2508393A/en not_active Withdrawn
-
2013
- 2013-11-29 GB GB201321068A patent/GB2510242A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4816827A (en) * | 1986-04-14 | 1989-03-28 | Essacq Baloutch | Road safety installation with emission of sound messages |
| DE29520819U1 (en) * | 1995-03-03 | 1996-04-11 | Rolli Engelbert | Device for limiting the driving speed of vehicles |
| DE19756706A1 (en) * | 1997-12-19 | 1999-06-24 | Ifak Inst Fuer Automation Und | Obstacle or road sign detection and identification device for road vehicle |
| DE10248968A1 (en) * | 2002-10-17 | 2004-06-03 | Deutsche Telekom Ag | System for transmitting information such as from a road sign to a vehicle using a sensor and a receiver |
| EP1422678A2 (en) * | 2002-11-20 | 2004-05-26 | France Telecom | Communication system with a vehicle |
| US20050280552A1 (en) * | 2004-06-16 | 2005-12-22 | Dipiazza Gerald C | System and method to wirelessly communicate information between traffic control signs and vehicles |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104149713A (en) * | 2014-08-01 | 2014-11-19 | 青岛盛嘉信息科技有限公司 | Motor vehicle plate management method |
| CN107111944A (en) * | 2014-12-30 | 2017-08-29 | 3M创新有限公司 | The label of vehicle identification system identification |
| CN107111944B (en) * | 2014-12-30 | 2021-03-23 | 3M创新有限公司 | Sign for vehicle identification system identification |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201321068D0 (en) | 2014-01-15 |
| GB2508393A (en) | 2014-06-04 |
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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) |