FR2670018A1 - Radio device for indicating a localised danger on the roadway - Google Patents
Radio device for indicating a localised danger on the roadway Download PDFInfo
- Publication number
- FR2670018A1 FR2670018A1 FR9015250A FR9015250A FR2670018A1 FR 2670018 A1 FR2670018 A1 FR 2670018A1 FR 9015250 A FR9015250 A FR 9015250A FR 9015250 A FR9015250 A FR 9015250A FR 2670018 A1 FR2670018 A1 FR 2670018A1
- Authority
- FR
- France
- Prior art keywords
- beacon
- danger
- receiver
- visual
- vehicle
- 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.)
- Granted
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
- G08G1/096708—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
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/68—Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Traffic Control Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
Description
DESCRIPTION
La présente invention concerne un dispositif permettant de signaler au conducteur d'un véhicule quTil aborde une zone à risques et qu'il doit réduire la vitesse de son véhicule - Travaux - Chantier mobile - Intersection dangereuse - Ecoles - Sorties d'usine, camions, véhicules de chantiers - Risque de verglas localisé - Obstacles occasionnels sur la chaussée - Tous "points noirs" ... etc ...DESCRIPTION
The present invention relates to a device making it possible to signal to the driver of a vehicle that he is approaching a risk zone and that he must reduce the speed of his vehicle - Works - Mobile site - Dangerous intersection - Schools - Factory outings, trucks, site vehicles - Risk of localized ice - Occasional obstacles on the roadway - All "black spots" ... etc ...
Sur la route, de telles zones sont actuellement signalées par des panneaux qui n attirent ou ne retiennent pas toujours l'attention du conducteur jus qu a son arrivée sur ladite zone.On the road, such zones are currently indicated by signs which do not always attract or hold the driver's attention until they arrive in said zone.
Il en résulte fréquemment des accidents trop souvent chers en vies humaines.This frequently results in accidents that are too often costly in human life.
Le dispositif, objet de l'invention, permet, par un signal audiovisuel à bord de son véhicule, d'avertir le conducteur de la proximité et de la présence d'une zone dangereuse jusqu'à ce qutil l'ait quittée. Ainsi son attention se trouve retenue et la sécurité renforcée.The device which is the subject of the invention makes it possible, by an audiovisual signal on board his vehicle, to warn the driver of the proximity and of the presence of a danger zone until he has left it. Thus his attention is retained and security reinforced.
CONSTITUTION DU DISPOSITIF - Une BALISE générant des signaux radioélectriques qui peut etre utilisée
de différentes fanons
Fixe pour des zones à risques connus et permanents
Transportable et posée au sol pour des zones à risques ponctuels
Embarquée à bord de véhicules.CONSTITUTION OF THE DEVICE - A BEACON generating radio signals which can be used
different baleen
Fixed for known and permanent risk areas
Transportable and placed on the ground for specific risk areas
On board vehicles.
- Un dispositif d'alimentation de la balise adapté à son utilisation et di
rectement connectable sur celle-ci.- A device for supplying the beacon adapted to its use and di
directly connectable on it.
(Base batterie avec panneaux solaires ou secteur EDF). (Battery base with solar panels or EDF sector).
- Des capteurs (Météo, de présence, de proximité, etc ...), placés en des
points stratégiques et reliés à la balise.- Sensors (Weather, presence, proximity, etc ...), placed in
strategic points and linked to the beacon.
- Un récepteur monté à bord des véhicules en circulation, comportant un a
vertisseur sonore et un dispositif visuel activés par les signaux reçus
lorsque le véhicule entre dans le champ démission de la balise (Ex: 250
mètres). Le dispositif visuel peut être intégré au boîtier récepteur ou
déporté. - A receiver mounted on board vehicles in circulation, comprising a
buzzer and a visual device activated by the received signals
when the vehicle enters the demise field of the beacon (Ex: 250
meters). The visual device can be integrated into the receiver box or
deported.
CARACTERISTIQUES PREMIERS - BALISE : Constituée d'un boîtier de dimensions d'environ 300x200x100 mm
(non limitatives), contenant toute ltélectronique nécessaire à son fonc
tionnement, équipé de passages de fils et de la connectique permettant
le raccordement des capteurs, de l'alimentation, et de l'antenne d'émis
sion.FIRST FEATURES - BEACON: Consists of a box with dimensions of approximately 300x200x100 mm
(nonlimiting), containing all the electronics necessary for its function
tionning, equipped with wire passages and connectors allowing
connection of sensors, power supply, and transmitting antenna
if we.
Le boîtier comporte également les éléments nécessaires à sa fixation sur
support fixe ou portable.The box also includes the elements necessary for its attachment to
fixed or portable support.
Les caractéristiques d'émission de la balise sont conformes avec les
dispositions législatives en vigueur.The emission characteristics of the beacon comply with the
legislative provisions in force.
- RECEPTEUR : Constitué d'un boîtier de dimensions d'environ 120x100x40 mm
contenant toute l'électronique nécessaire à son fonctionnement, équipé
de passage de fils et/ou de la connectique permettant le raccordement de
l'antenne de réception et de l'alimentation.- RECEIVER: Made up of a box with dimensions of approximately 120x100x40 mm
containing all the electronics necessary for its operation, equipped
passage of wires and / or connectors allowing the connection of
the receiving and feeding antenna.
La face avant comporte un ensemble d'ouïes pour le passage des sons
(Alarme audio), et un dispositif visuel (Alarme visuelle) ainsi qu un
bouton de réglage du volume sonore.The front has a set of gills for the passage of sounds
(Audio alarm), and a visual device (Visual alarm) as well as a
volume adjustment button.
Un connecteur situé sur le côté permet le déport du dispositif visuel. A connector on the side allows the visual device to be offset.
Les caractéristiques de réception sont en accord avec celles d'émission
de la balise.The reception characteristics are in agreement with those of transmission
of the tag.
Le volume sonore est réglable tout en garantissant un minimum. The sound volume is adjustable while ensuring a minimum.
MODES PARTICULIERS DE REALISATION
BALISE Il peut y etre connecté tout ou partie des capteurs.SPECIAL MODES OF EMBODIMENT
BEACON It can be connected to all or part of the sensors.
- L'émission des signaux radioélectriques peut etre permanente,
à à horaires et durées programmés,
provoquée pour une durée programmée par un capteur ayant détecté la
présence d'un véhicule à proximité de la balise et présentant un risque
ponctuel. (Voie secondaire),
provoquée par la détection, grâce à des capteurs, de conditions météo
rologiques pouvant rendre la circulation dangereuse (verglas, vent
violent ...).- The emission of radio signals can be permanent,
at at scheduled times and durations,
caused for a period programmed by a sensor that has detected the
presence of a vehicle near the beacon and presenting a risk
punctual. (Secondary route),
caused by the detection, thanks to sensors, of weather conditions
that can make traffic dangerous (ice, wind
violent ...).
- Les signaux radioélectriques peuvent etre modulés
en amplitude
. en fréquence
. en phase. - Radio signals can be modulated
in amplitude
. in frequency
. phase.
- La modulation peut être codée en fonction du capteur actif et etre du
type
analogique digitale.- The modulation can be coded according to the active sensor and be
type
analog digital.
RECEPTEUR - La réception et la détection des signaux radioélectriques issus de la
balise peuvent appliquer des principes purement analogiques, digitaux,
ou un mélange des deux.RECEIVER - Reception and detection of radio signals from the
tag can apply purely analogical, digital principles,
or a mixture of the two.
- Un dispositif visuel peut être prévu afin de distinguer le type de dan
ger que le conducteur va rencontrer (signaux d'émission codés).- A visual device can be provided to distinguish the type of dan
manage that the driver will encounter (coded emission signals).
DISPOSITIF - Le dispositif peut être prévu pour des applications dans les domaines de la navigation aérienne.DEVICE - The device can be provided for applications in the fields of air navigation.
DESSINS ANNEXES ILLUSTRANT L'INVENTION - FIGURE 1 : Représente le dispositif selon l'invention dans une de ses applications (émission permanente).ANNEX DRAWINGS ILLUSTRATING THE INVENTION - FIGURE 1: Represent the device according to the invention in one of its applications (permanent emission).
FIGURE 2 : Représente le principe de conception de la balise émettrice. FIGURE 2: Represent the principle of design of the transmitting beacon.
FIGURE 3 : Représente le principe de conception du récepteur. FIGURE 3: Shows the design principle of the receiver.
FIGURE 1 =
La balise émettrice (1) est fixée sur un support (5). Elle reçoit sonénergie issue d'un coffret auxiliaire (2) contenant le générateur d'énergie.FIGURE 1 =
The transmitting beacon (1) is fixed on a support (5). It receives its energy from an auxiliary box (2) containing the energy generator.
Les signaux radioélectriques (4) générés par la balise (1) sont transmis de l'antenne (3) à l'antenne (10) et sont amenés au récepteur (6) situé à bord du véhicule (13) par le cable (9). Le récepteur (6) reçoit son alimentation en énergie depuis la batterie (7) du véhicule par le cable (8).The radio signals (4) generated by the beacon (1) are transmitted from the antenna (3) to the antenna (10) and are brought to the receiver (6) located on board the vehicle (13) by the cable (9 ). The receiver (6) receives its power supply from the vehicle battery (7) by the cable (8).
Lorsque les signaux (4) détectés par le récepteur (6) sont identifiés et correspondent bien à ceux transmis par la balise (1) le dispositif visuel (12) est activé et le transducteur sonore (11) émet une tonalité dont le volume est réglable par le bouton de réglage (15). La prise JACK (14 )est utilisée pour raccorder le dispositif visuel (12) déporté.When the signals (4) detected by the receiver (6) are identified and correspond well to those transmitted by the beacon (1) the visual device (12) is activated and the sound transducer (11) emits a tone whose volume is adjustable by the adjustment button (15). The JACK socket (14) is used to connect the remote visual device (12).
FIGURE 2 =
Le fonctionnement de la balise émettrice s'articule autour d'une unité de gestion (1) composée d'un microcontrôleur, de ses composants annexes ainsi que d'un microprogramme. FIGURE 2 =
The operation of the transmitting beacon revolves around a management unit (1) composed of a microcontroller, its ancillary components as well as a firmware.
Elle reçoit des informations - de l'unité d'adaptation (2) qui se trouve en liaison à travers les con
necteurs (3) avec différents capteurs, entre autres
cellule photoélectrique
. capteur de température
. anémomètre
. radar hyperfréquence
boucle magnétique
. hygromètre
capteur de presssion.It receives information - from the adapter unit (2) which is connected through the con
nectors (3) with different sensors, among others
photoelectric cell
. temperature sensor
. anemometer
. microwave radar
magnetic loop
. hygrometer
pressure sensor.
Par commutation sur l'unité d'adaptation (2) ou par choix du logiciel de
l'unité de gestion (1) les informations issues des capteurs peuvent etre
ou non prises en compte.By switching to the adapter unit (2) or by choosing the software
the management unit (1) the information from the sensors can be
or not taken into account.
- De unité d'adaptation (4) reliée au commutateur (5) qui valide le fait
d'une émission permanente.- Adaptation unit (4) connected to the switch (5) which validates the fact
of a permanent broadcast.
- De l'unité d'adaptation (6) reliée au commutateur (7) qui valide le fait
d'une émission dont l'horaire de début et la durée peuvent être program
més lors de la mise en service.- The adaptation unit (6) connected to the switch (7) which validates the fact
a program whose start time and duration can be programmed
més during commissioning.
- De l'unité de programmation (9) contenant les organes servant à la mise à
l'heure de la balise et à fixer les heures de début ainsi que la durée
d'émission.- The programming unit (9) containing the organs used for setting
the beacon time and set the start times as well as the duration
resignation.
Sont connectés sur l'unité de gestion (1) - Un afficheur (8) donnant l'heure et les données introduites lors d'une
programmation.Are connected to the management unit (1) - A display (8) giving the time and the data entered during a
programming.
- Un interface (10) fournissant lorsque celà est nécessaire l'énergie à l'am
plificateur radiofréquence (13) et à son pilote (12) et ajustant suivant
la nature du terrain ou est implantée la balise, la puissance de l'émet-
teur de façon à obtenir une portée optimale (Ex: 250 mètres).- An interface (10) providing, when necessary, the energy for the am
radiofrequency planner (13) and to its pilot (12) and adjusting following
the nature of the terrain where the beacon is located, the power of the transmitter
so as to obtain an optimal range (Ex: 250 meters).
- Un interface (11) fournissant la modulation basse fréquence à la partie émission. - An interface (11) providing low frequency modulation to the transmission part.
L'émetteur est composé d'un oscillateur de référence (12) ou pilote et d'un amplificateur radiofréquence (13) effectuant l'adaptation à l'antenne raccordée sur le connecteur (14).The transmitter is composed of a reference oscillator (12) or pilot and a radio frequency amplifier (13) carrying out the adaptation to the antenna connected to the connector (14).
La source d'énergie extérieure est transmise via les connecteurs (17) au bloc alimentation (16) qui génère les tensions requises et les distribue sur les différents blocs composant la balise.The external energy source is transmitted via the connectors (17) to the power supply unit (16) which generates the required voltages and distributes them on the various blocks making up the beacon.
L'unité de gestion (1) est pilotée par une base de temps de référence (15). The management unit (1) is controlled by a reference time base (15).
C'est à partir des informations reçues soit par les capteurs, soit par les commutateurs (5) et (7), soit par l'unité de programmation (9) que l'unité de gestion (1) déclenchera l'émission des signaux radioélectriques contenant les informations codées suivant le type de danger qui seront ensuite traitées par le récepteur.It is from the information received either by the sensors, or by the switches (5) and (7), or by the programming unit (9) that the management unit (1) will trigger the emission of the signals. containing the information coded according to the type of danger which will then be processed by the receiver.
FIGURE 3 =
Le fonctionnement du récepteur à bord du véhicule s'effectue de la manière suivante
Les signaux radioélectriques modulés sont transmis de l'antenne au récepteur à l'aide d'un câble venant sur le connecteur (1) et sont présentés à l'entrée de l'unité de réception (2) qui en effectue l'amplification, le changement de fréquence et la démodulation.FIGURE 3 =
The operation of the receiver on board the vehicle is as follows
The modulated radio signals are transmitted from the antenna to the receiver using a cable coming from the connector (1) and are presented to the input of the reception unit (2) which amplifies them, frequency change and demodulation.
Les signaux basse fréquence ainsi obtenus sont transmis à un étage de mise en forme (3) puis à leur sortie, amenés sur l'unité de gestion (4) qui va en effectuer la vérification.The low frequency signals thus obtained are transmitted to a shaping stage (3) then at their output, brought to the management unit (4) which will carry out the verification.
Si les signaux sont bien issus de la balise émettrice, donc s'il y a danger, l'unité de gestion (4) va activer le dispositif visuel (5) ou le dispositif visuel déporté branché sur le connecteur (7) via le bloc de commutation (6) et va actionner le transducteur sonore (8) à travers l'amplificateur (12). Le volume sonore est réglable par l'organe de réglage (13) tout en garantissant un volume minimum.If the signals have indeed come from the transmitting beacon, therefore if there is a danger, the management unit (4) will activate the visual device (5) or the remote visual device connected to the connector (7) via the block switch (6) and will activate the sound transducer (8) through the amplifier (12). The sound volume is adjustable by the adjusting member (13) while guaranteeing a minimum volume.
L'unité de gestion ( 4) est pilotée par une base de temps de référence (9).The management unit (4) is controlled by a reference time base (9).
L'alimentation en énergie est assurée par la batterie du véhicule qui vient via le connecteur (11) au bloc d'alimentation (10) qui génère les tensions requises et les distribue sur les différents blocs composant le récepteur. The power supply is provided by the vehicle battery which comes via the connector (11) to the power supply unit (10) which generates the required voltages and distributes them on the different blocks making up the receiver.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9015250A FR2670018B1 (en) | 1990-11-29 | 1990-11-29 | RADIO DEVICE FOR SIGNALING A PUNCTUAL DANGER ON THE ROAD NETWORK. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9015250A FR2670018B1 (en) | 1990-11-29 | 1990-11-29 | RADIO DEVICE FOR SIGNALING A PUNCTUAL DANGER ON THE ROAD NETWORK. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2670018A1 true FR2670018A1 (en) | 1992-06-05 |
FR2670018B1 FR2670018B1 (en) | 1994-05-06 |
Family
ID=9402941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9015250A Expired - Fee Related FR2670018B1 (en) | 1990-11-29 | 1990-11-29 | RADIO DEVICE FOR SIGNALING A PUNCTUAL DANGER ON THE ROAD NETWORK. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2670018B1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2692392A1 (en) * | 1992-06-12 | 1993-12-17 | Barguirdjian Pascal | Electronic mannequin for public areas and road signalling - has system of motors and springs to move its arms and is equipped with electronic alarm to deter tampering or vandalism |
EP0575907A1 (en) * | 1992-06-26 | 1993-12-29 | MAGNETI MARELLI RETE S.p.A. | A system for the reception and transmission of information between fixed and mobile stations |
FR2714556A1 (en) * | 1993-12-27 | 1995-06-30 | Telia Ab | Device in a short distance mobile communication system. |
DE4440114A1 (en) * | 1994-10-19 | 1995-07-27 | Jaehnke Klaus Peter | Car radio-computer combination with display |
DE29610677U1 (en) * | 1996-06-18 | 1996-09-12 | Terbrack, Leo, Dipl.-Ing., 48691 Vreden | Arrangement for displaying traffic information |
WO1997008565A1 (en) * | 1995-08-28 | 1997-03-06 | Safety Warning System, L.C. | Highway safety method and apparatus |
EP0867849A2 (en) * | 1997-03-28 | 1998-09-30 | Matsushita Electric Industrial Co., Ltd. | Mobile unit support system to detect movement by means of a magnetic sensor |
FR2778771A1 (en) * | 1998-05-15 | 1999-11-19 | Christian Chifflet | Device for emitting or receiving an alert signal, used e.g. for vehicles in motorways to avoid accidents |
WO2001031609A1 (en) * | 1999-10-27 | 2001-05-03 | MINGUELLA LLOBET, José María | Help and/or risk signaling means for the traffic of vehicles and pedestrians using a short range infrared or electromagnetic signaling system |
GB2382206A (en) * | 2001-11-15 | 2003-05-21 | Steven Daniels | Vehicle information system |
EP1770669A1 (en) * | 2004-07-16 | 2007-04-04 | Fourie | Road condition informing system and road condition informing method |
CN105459897A (en) * | 2015-12-24 | 2016-04-06 | 广东好帮手电子科技股份有限公司 | Car pillar A blind area radar early warning system |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2692392A1 (en) * | 1992-06-12 | 1993-12-17 | Barguirdjian Pascal | Electronic mannequin for public areas and road signalling - has system of motors and springs to move its arms and is equipped with electronic alarm to deter tampering or vandalism |
EP0575907A1 (en) * | 1992-06-26 | 1993-12-29 | MAGNETI MARELLI RETE S.p.A. | A system for the reception and transmission of information between fixed and mobile stations |
FR2714556A1 (en) * | 1993-12-27 | 1995-06-30 | Telia Ab | Device in a short distance mobile communication system. |
NL9402215A (en) * | 1993-12-27 | 1995-07-17 | Telia Ab | Device in a mobile short-range communication system. |
ES2104504A1 (en) * | 1993-12-27 | 1997-10-01 | Telia Ab | Arrangement in a mobile short-range communication system |
DE4440114A1 (en) * | 1994-10-19 | 1995-07-27 | Jaehnke Klaus Peter | Car radio-computer combination with display |
WO1997008565A1 (en) * | 1995-08-28 | 1997-03-06 | Safety Warning System, L.C. | Highway safety method and apparatus |
DE29610677U1 (en) * | 1996-06-18 | 1996-09-12 | Terbrack, Leo, Dipl.-Ing., 48691 Vreden | Arrangement for displaying traffic information |
EP0867849A2 (en) * | 1997-03-28 | 1998-09-30 | Matsushita Electric Industrial Co., Ltd. | Mobile unit support system to detect movement by means of a magnetic sensor |
EP0867849A3 (en) * | 1997-03-28 | 2000-08-09 | Matsushita Electric Industrial Co., Ltd. | Mobile unit support system to detect movement by means of a magnetic sensor |
FR2778771A1 (en) * | 1998-05-15 | 1999-11-19 | Christian Chifflet | Device for emitting or receiving an alert signal, used e.g. for vehicles in motorways to avoid accidents |
WO2001031609A1 (en) * | 1999-10-27 | 2001-05-03 | MINGUELLA LLOBET, José María | Help and/or risk signaling means for the traffic of vehicles and pedestrians using a short range infrared or electromagnetic signaling system |
US6861959B1 (en) | 1999-10-27 | 2005-03-01 | Jose Maria Minguella Llobet | Help and/or risk signaling means for the traffic of vehicles and pedestrians using a short range infrared or electromagnetic signaling system |
GB2382206A (en) * | 2001-11-15 | 2003-05-21 | Steven Daniels | Vehicle information system |
EP1770669A1 (en) * | 2004-07-16 | 2007-04-04 | Fourie | Road condition informing system and road condition informing method |
EP1770669A4 (en) * | 2004-07-16 | 2008-09-17 | Fourie | Road condition informing system and road condition informing method |
US7817064B2 (en) | 2004-07-16 | 2010-10-19 | Fourie | Road-condition informing apparatus and road-condition informing method |
CN105459897A (en) * | 2015-12-24 | 2016-04-06 | 广东好帮手电子科技股份有限公司 | Car pillar A blind area radar early warning system |
Also Published As
Publication number | Publication date |
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FR2670018B1 (en) | 1994-05-06 |
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