EP1416458A1 - Device for control of vehicle speed - Google Patents

Device for control of vehicle speed Download PDF

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Publication number
EP1416458A1
EP1416458A1 EP02024161A EP02024161A EP1416458A1 EP 1416458 A1 EP1416458 A1 EP 1416458A1 EP 02024161 A EP02024161 A EP 02024161A EP 02024161 A EP02024161 A EP 02024161A EP 1416458 A1 EP1416458 A1 EP 1416458A1
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EP
European Patent Office
Prior art keywords
vehicle
speed
determining
viewfinder
orientation
Prior art date
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Granted
Application number
EP02024161A
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German (de)
French (fr)
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EP1416458B1 (en
Inventor
Dr. Bernard Monnier
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Individual
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Individual
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Priority to AT02024161T priority Critical patent/ATE358311T1/en
Priority to DE60219176T priority patent/DE60219176D1/en
Priority to EP02024161A priority patent/EP1416458B1/en
Priority to PCT/IB2003/004730 priority patent/WO2004040532A1/en
Priority to AU2003269420A priority patent/AU2003269420A1/en
Publication of EP1416458A1 publication Critical patent/EP1416458A1/en
Application granted granted Critical
Publication of EP1416458B1 publication Critical patent/EP1416458B1/en
Anticipated expiration legal-status Critical
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • G08G1/052Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • G08G1/054Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/01Detecting movement of traffic to be counted or controlled
    • G08G1/052Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed

Definitions

  • the present invention relates to devices for controlling the speed of vehicles, for example motor vehicles.
  • This type of device is well known.
  • the installation of such devices requires time relatively long.
  • control should be able to be done.
  • the helicopter is at a constant height and remains fixed or moving in the same direction as the controlled vehicle.
  • the device also includes a viewfinder associated with the optical device to direct the incident signals towards the vehicle whose speed is to be measured.
  • the position determination device of the device further comprises means for determining viewfinder orientation.
  • the calculating member is arranged so as to take into account the orientation of the viewfinder at each of said moments to determine said speed.
  • the vehicle and its driver can be identified by means of a camera arranged to operate simultaneously with the emission of incident signals and to record an image relating to the vehicle in its together and to its driver.
  • a second camera allows the capture of information arranged on an identification plate that the vehicle.
  • the light source emits radiation infrared.
  • the calculating member also determines the orientation of the device in relation to the terrestrial reference and the orientation of the vehicle with reference to the device.
  • the speed is defined by comparing several successive instantaneous speeds and by averaging them. So advantageous, instantaneous speeds are measured within a period of time of the order of a second.
  • a new measure is carried out after the first when the measured speed exceeds one limit value.
  • Figure 1 shows the general framework in which the measurement is made.
  • the latter relates to a motor vehicle 10 moving at a speed V a to be defined, on a road 12.
  • the measurement is carried out from a helicopter 14 flying in the vicinity of road 12.
  • the helicopter 14 comprises a cockpit 14a, in which the pilot, an operator and a measuring equipment 16 are located, and a frame 14b placed below the cockpit 14a and carrying a measuring head 18.
  • the equipment 16 and the head 18 together form a control device intended to determine the speed V a .
  • the measuring equipment 16 is formed by a control table 20, a computer 22 and a clock 24.
  • the head 18 comprises several devices mounted on the same chassis 25 which can be rotated along two orthogonal axes by means of two motors 26 and 28 associated with the armature 14b and controlled by the table 20, of so that the head 18 can sweep the space below the helicopter.
  • the clock 24, the viewfinder 36, the camera 38 and the apparatus 40 are connected to computer 22 so that information about when a measurement is made, at the vehicle considered and at the position of the helicopter be registered in a quasi-simultaneous and coordinated manner, in order to avoid any risk of confusion.
  • all of these information is gathered on paper, as proof of the measured.
  • the device 16 thus formed makes it possible to define the speed V a of the vehicle 10, as soon as we know in two successive instants the position P ti of the head 18, the distance d vi between the head 18 and the vehicle 10 as well as the orientation of the incident ray 32a. This is a simple trigonometry calculation, with no other accessible to those skilled in the art.
  • the operator located in the helicopter 14, directs the viewfinder 36 to a vehicle which has decided to control the velocity V a and controls the transmission of a series of pulses emitted by the source 30a in instants t i .
  • the distance d v is determined as follows. For each pulse i of the laser beam 32a sent by the source 30a, the sensor 30b receives a return signal 32b, after a time interval ⁇ t i depending on the distance d i between the head 18 and the controlled vehicle 10. Knowing the position of the head 18, the distance d i and the angles ⁇ i and ⁇ i , it is possible to determine an instantaneous position p vi of the vehicle 10, with reference to the helicopter 14. The position P vi of the vehicle defined with respect to on the ground can then be deduced from P ti and p vi .
  • the distance D v between two successive positions P vi and P vi + 1 can be calculated and, knowing the time ⁇ necessary to pass from one to the other of these positions, the average speed of the vehicle V v can be deduced by calculation using the computer 22, by dividing the distance traveled D v by the time ⁇ between two measurements.
  • the speed can then be determined as indicated above.
  • D v can be obtained by adding vectorially the distance traveled by the vehicle 10 and by the helicopter 14.
  • the pulses emitted by the source 32a are emitted within a period of time less than one second, so that the instantaneous speed of the vehicle hardly changes. If the computer highlights strong variations, it informs the operator, who can then start a new package.

Abstract

The apparatus has an optical appliance with a laser light source generating a succession of input signals and a sensor for signals reflected by a vehicle (10). An arithmetical unit (22) determines the vehicles spot speed between two successive spots corresponding to the transmission of the signals taking into account the apparatus position at each spot, and the distance between the appliance and vehicle at each spot. An Independent claim is also included for a procedure to determine a vehicles speed through a vehicle speed monitoring apparatus.

Description

La présente invention se rapporte aux dispositifs de contrôle de la vitesse de véhicules, par exemple de véhicules automobiles. Ce type de dispositif est bien connu. Il existe particulièrement des dispositifs fixes, disposés à demeure ou sporadiquement en un lieu donné, comportant conjointement un radar pour mesurer la vitesse et une caméra vidéo ou photographique, pour identifier le véhicule. La mise en place de tels dispositifs nécessite un temps relativement long. Par ailleurs, il est nécessaire qu'il soit disposé en un lieu discret pour présenter une certaine efficacité. Or, c'est parfois en des lieux très dégagés que le contrôle devrait pouvoir se faire.The present invention relates to devices for controlling the speed of vehicles, for example motor vehicles. This type of device is well known. There are particularly fixed devices, arranged at remains or sporadically in a given place, jointly comprising a radar to measure speed and a video or photographic camera, to identify the vehicle. The installation of such devices requires time relatively long. Furthermore, it is necessary that it be arranged in a place discreet to present a certain efficiency. However, it is sometimes in places very clear that control should be able to be done.

Certaines polices ont équipé des hélicoptères de matériel photographique et disposé des marques sur les routes à contrôler. De la sorte, il est possible de déterminer la vitesse d'un véhicule par deux photos successives. Cette solution nécessite des aménagements au sol, ce qui implique aussi obligatoirement que le contrôle se fait en des endroits précis.Some police have equipped helicopters with photographic equipment and placed marks on the roads to be checked. In this way, it is possible to determine the speed of a vehicle by two successive photos. This solution requires ground fittings, which also involves it is compulsory that the control is done in precise places.

Le but de la présente invention est de permettre un contrôle de la vitesse de manière à pouvoir l'effectuer en n'importe quel endroit découvert. Ce but est atteint grâce au fait que le dispositif comporte, en combinaison :

  • un appareil de détermination de la position du dispositif par radiogoniométrie,
  • un appareil optique muni d'une source de lumière à rayonnement laser, engendrant une succession de signaux incidents en des instants donnés, et d'un capteur des signaux réfléchis par le véhicule, et
  • un organe de calcul agencé pour déterminer la vitesse instantanée du véhicule entre deux instants voisins correspondant à l'émission de deux signaux incidents en prenant en compte :
    • la position du dispositif à chacun desdits moments, et
    • la distance comprise entre le dispositif et le véhicule à chacun desdits instants.
The object of the present invention is to allow speed control so that it can be carried out in any uncovered location. This object is achieved thanks to the fact that the device comprises, in combination:
  • an apparatus for determining the position of the device by direction-finding,
  • an optical device provided with a laser radiation light source, generating a succession of incident signals at given times, and a sensor for the signals reflected by the vehicle, and
  • a calculation unit arranged to determine the instantaneous speed of the vehicle between two neighboring times corresponding to the emission of two incident signals by taking into account:
    • the position of the device at each of said moments, and
    • the distance between the device and the vehicle at each of said times.

Pour pouvoir effectuer une mesure sur la base de ces seules informations, il est nécessaire que l'hélicoptère se trouve à une hauteur constante et reste fixe ou qu'il se déplace dans la même direction que le véhicule contrôlé.To be able to make a measurement on the basis of this information only, it it is necessary that the helicopter is at a constant height and remains fixed or moving in the same direction as the controlled vehicle.

Afin de permettre des conditions de travail permettant une meilleure adaptation à l'environnement, le dispositif comporte, en outre, un viseur associé à l'appareil optique pour diriger les signaux incidents vers le véhicule dont la vitesse doit être mesurée. L'appareil de détermination de la position du dispositif comporte, en outre, des moyens de détermination de l'orientation du viseur. De plus, l'organe de calcul est agencé de manière à prendre en compte l'orientation du viseur à chacun desdits moments pour déterminer ladite vitesse.In order to allow working conditions allowing better adaptation to the environment, the device also includes a viewfinder associated with the optical device to direct the incident signals towards the vehicle whose speed is to be measured. The position determination device of the device further comprises means for determining viewfinder orientation. In addition, the calculating member is arranged so as to take into account the orientation of the viewfinder at each of said moments to determine said speed.

L'identification du véhicule et de son conducteur peut être réalisée au moyen d'une caméra agencée pour fonctionner simultanément à l'émission des signaux incidents et pour enregistrer une image relative au véhicule dans son ensemble et à son conducteur. Une seconde caméra permet la saisie d'informations disposées sur une plaque d'identification que porte le véhicule.The vehicle and its driver can be identified by means of a camera arranged to operate simultaneously with the emission of incident signals and to record an image relating to the vehicle in its together and to its driver. A second camera allows the capture of information arranged on an identification plate that the vehicle.

De manière avantageuse, la source de lumière émet un rayonnement infrarouge.Advantageously, the light source emits radiation infrared.

La présente invention se rapporte également à un procédé mettant en oeuvre le dispositif défini ci-dessus. Selon ce procédé, l'organe de calcul détermine la vitesse à partir des opérations suivantes :

  • déterminer, à la réception des signaux réfléchis, la distance du véhicule en référence au dispositif,
  • déterminer, au moment de ladite réception, la position du dispositif par rapport à une référence terrestre,
  • calculer la distance parcourue par le véhicule entre deux réceptions successives, et
  • déterminer la vitesse instantanée du véhicule en divisant la distance parcourue par le temps mis pour la parcourir.
The present invention also relates to a method implementing the device defined above. According to this process, the calculation unit determines the speed from the following operations:
  • determining, on reception of the reflected signals, the distance from the vehicle with reference to the device,
  • determine, at the time of said reception, the position of the device with respect to a terrestrial reference,
  • calculate the distance traveled by the vehicle between two successive receptions, and
  • determine the instantaneous speed of the vehicle by dividing the distance traveled by the time taken to travel it.

De manière avantageuse, l'organe de calcul détermine, en outre, l'orientation du dispositif par rapport à la référence terrestre et l'orientation du véhicule en référence au dispositif.Advantageously, the calculating member also determines the orientation of the device in relation to the terrestrial reference and the orientation of the vehicle with reference to the device.

Afin d'éviter toute ambiguïté, la vitesse est définie en comparant plusieurs vitesses instantanées successives et en les moyennant. De manière avantageuse, les vitesses instantanées sont mesurées dans un laps de temps de l'ordre de la seconde.In order to avoid any ambiguity, the speed is defined by comparing several successive instantaneous speeds and by averaging them. So advantageous, instantaneous speeds are measured within a period of time of the order of a second.

Pour s'assurer qu'aucune contestation ne soit possible, une nouvelle mesure est effectuée à la suite de la première lorsque la vitesse mesurée dépasse une valeur limite.To ensure that no dispute is possible, a new measure is carried out after the first when the measured speed exceeds one limit value.

D'autres avantages et caractéristiques de l'invention ressortiront de la description qui va suivre, faite en regard du dessin annexé, dans lequel:

  • La figure 1 représente, de manière schématique, la situation générale dans laquelle s'effectue une mesure de vitesse de véhicule ;
  • La figure 2 montre la configuration générale du dispositif selon l'invention ; et
  • La figure 3 est un diagramme montrant les paramètres pris en compte dans le calcul de la vitesse d'un véhicule.
Other advantages and characteristics of the invention will emerge from the description which follows, given with reference to the appended drawing, in which:
  • FIG. 1 schematically represents the general situation in which a vehicle speed measurement is carried out;
  • Figure 2 shows the general configuration of the device according to the invention; and
  • FIG. 3 is a diagram showing the parameters taken into account in the calculation of the speed of a vehicle.

La figure 1 montre le cadre général dans lequel s'effectue la mesure. Cette dernière se rapporte à un véhicule automobile 10 en mouvement à une vitesse Va à définir, sur une route 12. La mesure est effectuée à partir d'un hélicoptère 14 volant dans le voisinage de la route 12. Figure 1 shows the general framework in which the measurement is made. The latter relates to a motor vehicle 10 moving at a speed V a to be defined, on a road 12. The measurement is carried out from a helicopter 14 flying in the vicinity of road 12.

L'hélicoptère 14 comprend un cockpit 14a, dans lequel se trouvent le pilote, un opérateur ainsi qu'un équipement de mesure 16, et une armature 14b disposée en dessous du cockpit 14a et portant une tête de mesure 18. L'équipement 16 et la tête 18 forment ensemble un dispositif de contrôle destiné à déterminer la vitesse Va.The helicopter 14 comprises a cockpit 14a, in which the pilot, an operator and a measuring equipment 16 are located, and a frame 14b placed below the cockpit 14a and carrying a measuring head 18. The equipment 16 and the head 18 together form a control device intended to determine the speed V a .

L'équipement de mesure 16 est formé d'une table de commande 20, d'un ordinateur 22 et d'une horloge 24.The measuring equipment 16 is formed by a control table 20, a computer 22 and a clock 24.

La tête 18 comporte plusieurs appareils montés sur un même châssis 25 lequel peut être tourné selon deux axes orthogonaux au moyen de deux moteurs 26 et 28 associés à l'armature 14b et commandés par la table 20, de manière à ce que la tête 18 puisse balayer l'espace se trouvant en dessous de l' hélicoptère.The head 18 comprises several devices mounted on the same chassis 25 which can be rotated along two orthogonal axes by means of two motors 26 and 28 associated with the armature 14b and controlled by the table 20, of so that the head 18 can sweep the space below the helicopter.

Comme le montre la figure 2, la tête 18 comprend plus précisément :

  • un appareil optique 30 muni d'une source de lumière 30a émettant un rayon laser 32a et d'un capteur 30b agencé pour recevoir un signal réfléchi 32b généré par la réflexion du rayon 32a sur le véhicule 10,
  • un viseur 36, par exemple une caméra vidéo, accouplé rigidement à l'appareil optique 30, dont l'image est affichée sur la table de commande 20, qui permet à l'opérateur d'orienter le rayon laser 32a sur le véhicule 10 dont la vitesse doit être mesurée,
  • une caméra d'identification 38 permettant d'enregistrer par voie optique des informations optiques agrandies, relatives au véhicule 10, par exemple une photographie de la plaque minéralogique, et
  • un appareil 40 de détermination par radiogoniométrie de la position Pt de la tête 18, avantageusement du type connu sous l'abréviation de GPS, agencé pour permettre de déterminer en tout temps sa longitude Lt, sa latitude lt et son altitude ht, ainsi que l'orientation du rayon 32a en référence au nord, définie par l'angle αt, et en référence à l'horizontal, définie par l'angle βt.
As shown in FIG. 2, the head 18 more precisely comprises:
  • an optical device 30 provided with a light source 30a emitting a laser beam 32a and a sensor 30b arranged to receive a reflected signal 32b generated by the reflection of the beam 32a on the vehicle 10,
  • a viewfinder 36, for example a video camera, rigidly coupled to the optical device 30, the image of which is displayed on the control table 20, which allows the operator to orient the laser beam 32a on the vehicle 10 whose speed must be measured,
  • an identification camera 38 making it possible to record enlarged optical information relating to vehicle 10, for example a photograph of the license plate, by optical means, and
  • an apparatus 40 for determining the position P t of the head 18 by direction-finding, advantageously of the type known by the abbreviation of GPS, arranged to make it possible to determine at any time its longitude L t , its latitude l t and its altitude h t , as well as the orientation of the radius 32a with reference to the north, defined by the angle α t , and with reference to the horizontal, defined by the angle β t .

L'horloge 24, le viseur 36, la caméra 38 et l'appareil 40 sont reliés à l'ordinateur 22 de manière à ce que les informations relatives au moment où une mesure est effectuée, au véhicule considéré et à la position de l'hélicoptère soient enregistrées de manière quasi simultanée et coordonnée, afin d'éviter tout risque de confusion. De manière avantageuse, toutes ces informations sont regroupées sur un support papier, comme preuve de la mesure.The clock 24, the viewfinder 36, the camera 38 and the apparatus 40 are connected to computer 22 so that information about when a measurement is made, at the vehicle considered and at the position of the helicopter be registered in a quasi-simultaneous and coordinated manner, in order to avoid any risk of confusion. Advantageously, all of these information is gathered on paper, as proof of the measured.

Le dispositif 16 ainsi constitué permet de définir la vitesse Va du véhicule 10, dès lors qu'on connaít en deux instants successifs la position Pti de la tête 18, la distance dvi comprise entre la tête 18 et le véhicule 10 ainsi que l'orientation du rayon incident 32a. Il s'agit là d'un simple calcul de trigonométrie, sans autre accessible à l'homme du métier.The device 16 thus formed makes it possible to define the speed V a of the vehicle 10, as soon as we know in two successive instants the position P ti of the head 18, the distance d vi between the head 18 and the vehicle 10 as well as the orientation of the incident ray 32a. This is a simple trigonometry calculation, with no other accessible to those skilled in the art.

Pour effectuer une mesure, l'opérateur, installé dans l'hélicoptère 14, oriente le viseur 36 vers un véhicule dont il a décidé de contrôler la vitesse Va, puis commande l'émission d'une série d'impulsions émises par la source 30a en des instants ti.To perform a measurement, the operator, located in the helicopter 14, directs the viewfinder 36 to a vehicle which has decided to control the velocity V a and controls the transmission of a series of pulses emitted by the source 30a in instants t i .

La détermination de la distance dv s'effectue de la manière suivante. Pour chaque impulsion i du rayon laser 32a envoyée par la source 30a, le capteur 30b reçoit un signal de retour 32b, après un intervalle de temps Δti fonction de la distance di comprise entre la tête 18 et le véhicule contrôlé 10. Connaissant la position de la tête 18, la distance di et les angles αi et βi, il est possible de déterminer une position instantanée pvi du véhicule 10, en référence à l'hélicoptère 14. La position Pvi du véhicule définie par rapport au sol peut être ensuite déduite de Pti et de pvi.The distance d v is determined as follows. For each pulse i of the laser beam 32a sent by the source 30a, the sensor 30b receives a return signal 32b, after a time interval Δt i depending on the distance d i between the head 18 and the controlled vehicle 10. Knowing the position of the head 18, the distance d i and the angles α i and β i , it is possible to determine an instantaneous position p vi of the vehicle 10, with reference to the helicopter 14. The position P vi of the vehicle defined with respect to on the ground can then be deduced from P ti and p vi .

Si les impulsions sont données à des intervalles de temps τ, la distance Dv comprise entre deux positions successives Pvi et Pvi+1 peut être calculée et, connaissant le temps τ nécessaire pour passer de l'une à l'autre de ces positions, la vitesse moyenne du véhicule Vv peut être déduite par calcul au moyen de l'ordinateur 22, en divisant la distance parcourue Dv par le temps τ compris entre deux mesures.If the pulses are given at time intervals τ, the distance D v between two successive positions P vi and P vi + 1 can be calculated and, knowing the time τ necessary to pass from one to the other of these positions, the average speed of the vehicle V v can be deduced by calculation using the computer 22, by dividing the distance traveled D v by the time τ between two measurements.

Comme le montre la figure 3, il est possible d'obtenir une information précise de manière beaucoup plus simple. Dans la mesure où l'hélicoptère est fixe durant le temps de la mesure (inférieur à la seconde), il est possible de ne prendre en compte que la position de l'hélicoptère et sa distance d'avec le véhicule. Plus précisément, si la hauteur de l'hélicoptère en référence au sol reste constante, la distance Dv pour deux instant successifs t1 et t2 peut être obtenue par la formule : Dv = (dv1 2 -ht 2)1/2 - (dv2 2 -ht 2)1/2 As shown in Figure 3, it is possible to obtain precise information in a much simpler way. Insofar as the helicopter is fixed during the measurement time (less than a second), it is possible to take into account only the position of the helicopter and its distance from the vehicle. More precisely, if the height of the helicopter in reference to the ground remains constant, the distance D v for two successive times t 1 and t2 can be obtained by the formula: D v = (d v1 2 -h t 2 ) 1/2 - (d v2 2 -h t 2 ) 1/2

La vitesse peut alors être déterminée comme indiqué ci-dessus.The speed can then be determined as indicated above.

Si l'hélicoptère se déplace selon une même direction que le véhicule dont la vitesse doit être mesurée, Dv peut être obtenu en additionnant vectoriellement la distance parcourue par le véhicule 10 et par l'hélicoptère 14.If the helicopter is moving in the same direction as the vehicle whose speed is to be measured, D v can be obtained by adding vectorially the distance traveled by the vehicle 10 and by the helicopter 14.

Typiquement, les impulsions émises par la source 32a le sont dans un laps de temps inférieur à la seconde, de manière à ce que la vitesse instantanée du véhicule ne varie pratiquement pas. Si l'ordinateur met en évidence de fortes variations, il en informe l'opérateur qui peut alors mettre en route un nouveau train de mesures.Typically, the pulses emitted by the source 32a are emitted within a period of time less than one second, so that the instantaneous speed of the vehicle hardly changes. If the computer highlights strong variations, it informs the operator, who can then start a new package.

Ainsi, grâce à la structure du dispositif décrit ci-dessus et au procédé qu'il permet de mettre en oeuvre, il est possible de d'effectuer des contrôle de vitesse tout au long d'une autoroute, sans longue préparation et avec une grande précision de mesuretout en garantissant de bonnes conditions d'identification du véhicule.Thus, thanks to the structure of the device described above and to the process which it allows to implement, it is possible to perform control of speed along a highway, without long preparation and with a high accuracy of measurement while guaranteeing good conditions vehicle identification.

Claims (10)

Dispositif de contrôle (16, 18) de la vitesse (Va) de véhicules caractérisé en ce qu'il comporte, en combinaison : un appareil (40) de détermination de la position du dispositif par radio-goniométrie, un appareil optique (30) muni d'une source de lumière (30a) à rayonnement laser, engendrant une succession de signaux incidents (32a), et d'un capteur (30b) des signaux réfléchis (32b) par le véhicule (10), et un organe de calcul (22) agencé pour déterminer la vitesse instantanée (vi' vi+1) du véhicule entre deux instants voisins (ti, ti+1) correspondant à l'émission de deux signaux incidents (32a) en prenant en compte : la position du dispositif à chacun desdits moments, et la distance (dvi, dvi+1) comprise entre l'appareil optique (30) et le véhicule (30) en chacun desdits instants. Control device (16, 18) for the speed (V a ) of vehicles, characterized in that it comprises, in combination: an apparatus (40) for determining the position of the device by radio-direction finding, an optical device (30) provided with a light source (30a) with laser radiation, generating a succession of incident signals (32a), and a sensor (30b) of the signals reflected (32b) by the vehicle (10) , and a calculating member (22) arranged to determine the instantaneous speed (v i 'v i + 1 ) of the vehicle between two neighboring instants (t i , t i + 1 ) corresponding to the emission of two incident signals (32a) in taking into account : the position of the device at each of said moments, and the distance (d vi , d vi + 1 ) between the optical device (30) and the vehicle (30) at each of said times. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte, en outre, un viseur (36) associé à l'appareil optique (30) pour diriger les signaux incidents (32a) vers le véhicule (10) dont la vitesse doit être mesurée, en ce que l'appareil (40) de détermination de la position est muni de moyens de détermination de l'orientation du viseur (369), et en ce que l'organe de calcul (22) est agencé de manière à prendre en compte l'orientation dudit viseur (36) à chacun desdits instants pour déterminer ladite vitesse (Va).Device according to claim 1, characterized in that it further comprises a viewfinder (36) associated with the optical device (30) for directing the incident signals (32a) to the vehicle (10) whose speed must be measured, in that the apparatus (40) for determining the position is provided with means for determining the orientation of the viewfinder (369), and in that the calculating member (22) is arranged so as to take taking into account the orientation of said viewfinder (36) at each of said times to determine said speed (Va). Dispositif selon l'une des revendications 1 et 2, caractérisé en ce que ledit viseur comporte une caméra agencée pour fonctionner simultanément à l'émission des signaux incidents (32a) et pour enregistrer une image relative au véhicule (10) dans son ensemble et à son conducteur. Device according to either of Claims 1 and 2, characterized in that the said viewfinder comprises a camera arranged to operate simultaneously with the emission of the incident signals (32a) and to record an image relating to the vehicle (10) as a whole and to its driver. Dispositif selon la revendication 2, caractérisé en ce qu'il comporte une seconde caméra (38) permettant la saisie des informations disposées sur une plaque d'identification que porte ledit véhicule (10).Device according to claim 2, characterized in that it comprises a second camera (38) allowing the entry of the information arranged on an identification plate carried by said vehicle (10). Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que ladite source de lumière émet un rayonnement infrarouge.Device according to one of claims 1 to 3, characterized in that said light source emits infrared radiation. Procédé pour déterminer la vitesse d'un véhicule (10) au moyen d'un dispositif selon l'une des revendications 1 à 5, caractérisé en ce que ledit organe de calcul détermine ladite vitesse à partir des opérations suivantes : déterminer, à la réception des signaux réfléchis, la distance du véhicule (10) en référence au dispositif (18), déterminer, au moment de ladite réception, la position du dispositif (18) par rapport à une référence terrestre, calculer la distance parcourue par le véhicule (10) entre deux réceptions successives, et déterminer la vitesse instantanée du véhicule (10) en divisant la distance parcourue par le temps mis pour la parcourir. Method for determining the speed of a vehicle (10) by means of a device according to one of claims 1 to 5, characterized in that said calculating member determines said speed from the following operations: determining, on reception of the reflected signals, the distance from the vehicle (10) with reference to the device (18), determining, at the time of said reception, the position of the device (18) relative to a terrestrial reference, calculate the distance traveled by the vehicle (10) between two successive receptions, and determining the instantaneous speed of the vehicle (10) by dividing the distance traveled by the time taken to travel it. Procédé selon la revendication 6, pour déterminer la vitesse d'un véhicule (10) au moyen d'un dispositif (16, 18) selon la revendication 2, caractérisé en ce que ledit organe de calcul (22) détermine, en outre, l'orientation du dispositif (18) par rapport à la référence terrestre et l'orientation du véhicule (10) en référence au dispositif (18).Method according to claim 6, for determining the speed of a vehicle (10) by means of a device (16, 18) according to claim 2, characterized in that said calculating member (22) further determines the orientation of the device (18) relative to the terrestrial reference and orientation of the vehicle (10) with reference to the device (18). Procédé selon l'une des revendications 6 et 7, caractérisé en ce que la détermination de ladite vitesse (Va) est définie en comparant plusieurs vitesses instantanées successives et en les moyennant. Method according to one of claims 6 and 7, characterized in that the determination of said speed (V a ) is defined by comparing several successive instantaneous speeds and by averaging them. Procédé selon la revendication 8, caractérisé en ce que les vitesses instantanées successives sont mesurées dans un laps de temps de l'ordre de la seconde.Method according to claim 8, characterized in that the successive instantaneous speeds are measured within a period of the order of one second. Procédé selon la revendication 9, caractérisé en ce que une nouvelle mesure est effectuée à la suite de la première lorsque la vitesse mesurée dépasse une valeur limite.Method according to claim 9, characterized in that a new measurement is carried out after the first when the measured speed exceeds a limit value.
EP02024161A 2002-10-30 2002-10-30 Device for control of vehicle speed Expired - Lifetime EP1416458B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT02024161T ATE358311T1 (en) 2002-10-30 2002-10-30 DEVICE FOR MONITORING THE SPEED OF VEHICLES
DE60219176T DE60219176D1 (en) 2002-10-30 2002-10-30 Device for monitoring the speed of vehicles
EP02024161A EP1416458B1 (en) 2002-10-30 2002-10-30 Device for control of vehicle speed
PCT/IB2003/004730 WO2004040532A1 (en) 2002-10-30 2003-10-23 Vehicle speed control device
AU2003269420A AU2003269420A1 (en) 2002-10-30 2003-10-23 Vehicle speed control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02024161A EP1416458B1 (en) 2002-10-30 2002-10-30 Device for control of vehicle speed

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EP1416458A1 true EP1416458A1 (en) 2004-05-06
EP1416458B1 EP1416458B1 (en) 2007-03-28

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EP (1) EP1416458B1 (en)
AT (1) ATE358311T1 (en)
AU (1) AU2003269420A1 (en)
DE (1) DE60219176D1 (en)
WO (1) WO2004040532A1 (en)

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CN103198666A (en) * 2013-03-19 2013-07-10 东南大学 Highway traffic stream space average speed observation method based on fixed wing model airplane

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CN103198666B (en) * 2013-03-19 2015-03-04 东南大学 Highway traffic stream space average speed observation method based on fixed wing model airplane

Also Published As

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AU2003269420A1 (en) 2004-05-25
EP1416458B1 (en) 2007-03-28
WO2004040532A1 (en) 2004-05-13
DE60219176D1 (en) 2007-05-10
ATE358311T1 (en) 2007-04-15

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