WO2012080799A1 - Système et procédé d'avertissement précoce de collision - Google Patents

Système et procédé d'avertissement précoce de collision Download PDF

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Publication number
WO2012080799A1
WO2012080799A1 PCT/IB2011/002974 IB2011002974W WO2012080799A1 WO 2012080799 A1 WO2012080799 A1 WO 2012080799A1 IB 2011002974 W IB2011002974 W IB 2011002974W WO 2012080799 A1 WO2012080799 A1 WO 2012080799A1
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WO
WIPO (PCT)
Prior art keywords
warning
road user
threat
electronic processor
warning system
Prior art date
Application number
PCT/IB2011/002974
Other languages
English (en)
Inventor
Nolan Van Heerden
Original Assignee
Ikubu Cc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ikubu Cc filed Critical Ikubu Cc
Publication of WO2012080799A1 publication Critical patent/WO2012080799A1/fr

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Classifications

    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B62J45/412—Speed sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/22—Warning or information lights
    • B62J6/24—Warning or information lights warning or informing the rider, e.g. low fuel warning lights
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
    • B62J6/22—Warning or information lights
    • B62J6/26—Warning or information lights warning or informing other road users, e.g. police flash lights
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal

Definitions

  • This invention relates to a warning system and method for detecting and warning road users other than those travelling in motor vehicles, for example cyclists, construction workers, recreational road users and other pedestrians, of impending danger approaching from a direction not in the road user's normal field of vision such as from the rear.
  • the system and method are particularly suited for use on bicycles but may be used by any road users typically travelling along the edges of roads otherwise predominantly used by automobiles.
  • vehicle as used in this specification mostly refers to bicycles but, where appropriate, should be widely construed to include other types of vehicles such as motorbikes or other smaller transport means which may or may not be self-propelled.
  • vehicle may also include other non-motorised vehicles such as animal drawn carts, push cards, perambulators and the like.
  • motor vehicle or “automobile” which will be used to refer to larger, typically enclosed, vehicles and passenger vehicles such as cars, taxis, trucks, vans and buses.
  • Cycling in both its on- and off road varieties, is a sport that has enjoyed marked growth in recent years. As such, the number and frequency of cyclists cycling along public roads has also increased substantially. An unfortunate result of this increase has been the associated increase in collisions between motor vehicles and bicycles. Due to the general lack of protection afforded cyclists during these collisions, cyclists involved in these collisions incur severe, often fatal, injuries while the motorists are generally unharmed. Many public roads do not have dedicated cycle lanes, nor do they have adequate shoulder sections where cyclists can ride beside the road surface generally used by motor vehicles. As a result, cyclists are forced to keep to the outer edges of road surfaces so as to allow motor vehicles to pass them, mostly at much higher speeds.
  • Bicycles are also typically not fitted with rear view mirrors such as are fitted to most motor vehicles and motorbikes. Even though such rear view mirrors are available for bicycles they are generally clumsy and appear awkward. This means that a cyclist is generally not able to see what is approaching him or her from behind and needs to rely solely on hearing or light from the incoming motor vehicles in low light conditions. Bad weather conditions such as wind or general background or road noise, however, means that hearing alone is also not a reliable way of warning the cyclist that a motor vehicle is approaching from behind. To add to this, it has become commonplace for cyclists to use personalized audio players that make use of earphones while cycling.
  • retrofittable devices have been developed to increase cyclist visibility to motorists but almost none of these are aimed at forewarning the cyclist of danger approaching from the rear or other directions not in the cyclist's direct field of vision.
  • retrofittable devices include passive reflectors, reflective clothing, electrical lighting which may be either battery operated or driven by dynamos that engage the bicycle wheels, mirrors, and more recently Light Emitting Diodes (LEDs) that are typically battery operated, to name but a few.
  • LEDs Light Emitting Diodes
  • an early warning system for a road user comprising a sensor configured to be installed such that its field and range of detection covers at least one direction not ordinarily in the field of view of the road user and wherein the sensor is adapted to sense the presence of objects within the field and range of detection, a warning device configured to be installed so as to be capable of providing a warning signal to the road user, and an electronic processor for operating the warning device, potentially by means of a controller, based, at least to some extent, on information developed from data received from the sensor, the sensor being capable of developing data from which at least the location and velocity relative to the sensor of objects within its field and range of detection can be derived and wherein the electronic processor is configured to determine a level of threat posed by one or more of the objects within the field and range of detection to the road user, such threat potentially including a likelihood of a colliding with the road user, and to provide an output to the controller for controlling the warning device to produce a warning to the operator dependent, at least to some extent, on the level of threat
  • the road user to be an operator of a vehicle; for the sensor to be a radar sensor configured to be installed on the vehicle, alternatively for it to include attachment means for securing it on the person of the road user; for the vehicle to be a bicycle; for the direction to be the rear of the road user; for the warning device to be a visual indicator configured to be installed so as to be in a dominant field of vision of the road user, in the case of the road user being a cyclist preferably on the handle bars of the bicycle; for the visual indicator to be adapted to indicate varying degrees of warning dependent on the level of threat as determined by the electronic processor; for the visual indicator to be an array of light emitting diodes (LEDs); and for the output to cause the controller to activate a larger number of LEDs in response to a higher level of threat and a smaller number of LEDs in response to a lower level of threat.
  • LEDs light emitting diodes
  • warning device to be a mechanical or electrical actuator including an attachment formation for removably attaching it to the person of the road user.
  • the electronic processor to include a computer or microprocessor programmed to provide an output on the basis of computational or artificial intelligence optionally in combination with one or more appropriate algorithms; and for the output to be adapted to automatically operate said controller.
  • the system to include a secondary warning device adapted for installation with the sensor and orientated in substantially the same direction as the sensor for providing warning signals to objects approaching the road user from the direction; for the secondary warning device to be a light source; for the light source to be at least one but preferably a collection of LEDs; for the processor to be adapted to control the secondary warning device so as to emit warning signals of varying degrees of intensity or varying behavioural patterns dependent, at least to some extent, on the level of threat and/or degree of likelihood of a collision occurring; and for the secondary warning device to be a strobe light controlled by the processor or a controller to flash vigorously when a high level of threat or likelihood of a collision occurring is determined by the electronic processor.
  • a secondary warning device adapted for installation with the sensor and orientated in substantially the same direction as the sensor for providing warning signals to objects approaching the road user from the direction; for the secondary warning device to be a light source; for the light source to be at least one but preferably a collection of LEDs; for the processor to be adapted
  • the invention further provides a method of warning a road user of the possibility of a collision with an object approaching it from a direction not ordinarily in the field of vision of the road user occurring, the method comprising sensing the presence, location and velocity relative to the road user of objects within a field and range of detection of a sensor orientated in the direction, processing data generated by the sensor using computational or artificial intelligence optionally in combination with one or more appropriate algorithms to determine a level of threat posed by an approaching vehicle or a degree of likelihood of a collision occurring between the vehicle and the object and to provide an output based, at least to some extent, on the level of threat or likelihood, and activating a controller for a warning device configured to communicate a warning signal to the operator on the basis of such output.
  • Figure 1 is a block diagram of one embodiment of a system according to the invention for warning a road user of the possibility of a collision with an approaching object
  • Figure 2 is a side elevation of a bicycle fitted with an early warning system as described with reference to Figure 1
  • Figure 3 is a plan view of a road showing a cyclist utilising a collision early warning system in accordance with the invention.
  • a warning system (1) as provided by this invention is represented by the block diagram shown in Figure 1 and is shown installed on a bicycle (2) in Figure 2.
  • the system includes a sensor (3), which in the current embodiment is a micro-radar.
  • the radar (3) has a predetermined field and range of detection represented in Figures 2 and 3 by the triangular area indicated by numeral (4). While it is foreseeable that a large variety of sensors may be suitable for use with the system and method of the invention, it is presently proposed to use a low power radar sensor, preferably an FMCW radar.
  • the radar proposed to be used consumes approximately 5 mW of power and has an effective sensing range of approximately 100 meters.
  • Such radar sensors typically operate in the X-band of frequencies which ranges from approximately 8.0 to 12.0 GHz.
  • the radar utilises two antennas, one for transmitting and one for receiving. It is however foreseeable that a larger number of antennas may be used.
  • the Doppler shift of the received signal is also determined and used to determine the object's instantaneous speed according to the Doppler principle, weather the object is moving towards or away from the sensor, and also the rate at which the distance from the sensor to the object that is being observed is changing with respect to time (this is often referred to as the range-rate of the object).
  • the measurements are done continuously at high frequencies, typically multiple times a second. This arrangement enables the movement of objects sensed within the sensing field (4), including their velocities relative to the sensor (3) and, most importantly, their direction of travel to be determined and the behaviour of the objects to be tracked as they move through the sensing field (4). This behaviour can then be compared to information contained in a database in order to calculate potential levels of threat to the road user and identify potentially dangerous situations.
  • the data generated by the radar (3) is relayed to an electronic processor (5) in the form of a computer or microprocessor which processes and analyses the data and, in turn, provides an output signal to a controller (7) based at least to some extent on the data sensed by the radar sensor (3).
  • the controller controls a warning device (8), in the current embodiment an array of six light emitting diodes (LEDs) arranged in a row and installed so as to be visible to the cyclist during cycling. It should immediately be apparent that the processor (5) may also control the warning device (8) directly, without it being necessary to go via the controller (7).
  • LEDs light emitting diodes
  • the radar (3) is installed in a convenient location on the bicycle (2) so that its field and range of detection (4) covers at least a portion of the road area towards the rear (13) of the bicycle.
  • a convenient place to install the radar (3) is underneath the seat (10) of the bicycle.
  • the warning device (8) is in turn installed on the handle bars (9) of the bicycle (2) so as to be visible to the cyclist during use.
  • the output from the processor (5) to the controller (7) is generated on the basis of computational or artificial intelligence optionally in combination with one or more appropriate algorithms stored in computer readable format on a database associated with the processor.
  • the processor calculates, based at least on the position and velocity of objects sensed in the sensing field, firstly whether such objects are approaching the bicycle (2) and, secondly, what the level of threat is that the approaching vehicle (or other object) poses to the cyclist.
  • This level of threat may include a degree of likelihood, based on their travelling speed and direction of travel, of any of the objects colliding with the bicycle.
  • the database contains a series of thresholds which, once exceeded by an object travelling towards the cyclist, indicates that the object has entered a state from where there is a high likelihood that it will not have sufficient time to take corrective action to avoid a collision with the cyclist.
  • One way of determining whether a sensed object is moving directly towards the bicycle is to compare the object's instantaneous (Doppler) speed with its range rate. If these are the same it implies that the object is moving directly towards the bicycle.
  • Doppler instantaneous
  • the speed at which the object is approaching as well as its distance from the bicycle will then give an indication of the level of threat the object poses to the cyclist as well as whether or not the object will be able to brake sufficiently early to avoid a collision or weather a collision is imminent, thus requiring immediate evasive action from the cyclist.
  • the processor (5) then generates an output signal to the controller (7) (or to the warning device directly, as the case may be) which is proportional to the level of threat and/or the degree of likelihood of a collision occurring.
  • the controller (7) illuminates one or more of the LEDs in response to the output signal.
  • a high level of threat for example, causes the controller to illuminate the majority, or all, of the LEDs, whereas a small number of illuminated LEDs correspond to a low level of threat.
  • the LEDs in the current embodiment are of different colours. The first three are green and represent a low to average level of threat, with three green LEDs illuminated simultaneously representing a higher level of threat than one or two. The following two LEDs are amber and represent an average to high level of threat. The final LED is red and represents a critical level of threat or imminent collision risk, thus requiring the cyclist to take immediate evasive action such as, for example, driving off the road surface.
  • warning device (8) may indicate to the cyclist the degree of evasive action he or she may wish to take.
  • a low level of threat could, for example, simply indicate to the cyclist that he or she should stay close to the edge of the road or, even more importantly, not move towards the centre of the road, while a high level of threat may require much more drastic action.
  • the algorithms and predefined thresholds are also adapted to discard objects that obviously do not present a threat to the cyclist. These could, for example, include other cyclists, stationary objects and objects moving away from the sensor.
  • the radar (3) or processor (5) may also be able to ascertain the relative size of an object headed towards it. The system may therefore be able to determine whether an object is a passenger vehicle, other motor vehicle, bicycle, public transport vehicle such as a bus or mini bus, or even a pedestrian.
  • the size of the motor vehicle detected could also indicate to the road user the expected amount of air turbulence he or she should prepare for.
  • the system (1) also includes a secondary warning device (11) in the form of a light which is also controlled by the controller (7) or processor (5), directly, and which is conveniently installed adjacent the radar sensor (3) so as to be clearly visible from the rear of the bicycle by approaching objects.
  • the controller (7) is configured to control the secondary warning device (11) to emit visual warning signals of varying degrees of intensity or varying behavioural patterns dependent, at least to some extent, on the level of threat and degree of likelihood of a collision occurring as determined by the processor (5).
  • Objects approaching the cyclist causes the processor (5) to send control signals to the secondary warning device (1 1 ), causing it to flash.
  • the intensity and/or frequency of the flash may be directly proportional to the level of threat and/or degree of the likelihood of a collision occurring.
  • this secondary warning light (1 1 ) conserves energy in that it only activates in potentially dangerous situations and when vehicles are approaching the bicycle from behind. It is therefore intelligent and much more effective in informing motorists of the bicycle's presence. From the above it will be clear that the system according to this invention is able to determine the level of threat and the likelihood of a collision occurring between the road user utilising the system and an object such as a motor vehicle approaching it from a direction not generally in the field of the view of the road user, such as the rear, and warning the road user in time to take evasive action, thus avoiding collisions and potentially saving the road user's life.
  • the system may also be able to identify and track the movement of a number of objects within the sensing field simultaneously. In such a scenario it may also be able to determine the location, speed, direction of travel as well as potentially other parameters of each of the identified objects and determine a level of threat and likelihood of any of these objects being involved in a collision with the road user.
  • a cyclist (14) using a bicycle (2) utilising a system in accordance with the invention, and who is cycling along the edge ( 5) of a road (16) will receive warning if a vehicle (17), travelling within the system's sensing field (4) is approaching it from behind. Due to its current velocity and distance from the sensor, it may pose a level of threat to the cyclist or may even be likely to collide with him or her.
  • the warning device in the cyclist's field of vision will indicate the presence, as well as the level of threat posed by the object to the cyclist. This will allow the cyclist to take immediate evasive action, if required, by, for example, cycling off the road and onto the pedestrian walkway (18) running alongside the road.
  • the processor of the system will also be able to determine that a vehicle (19) travelling in the opposite direction (20) to the bicycle, when it enters the sensing field (4), is travelling away from the bicycle and will not pose a potential collision threat.
  • the collision early warning system of the invention is equally effective under good and bad light conditions, as the radar sensor is not dependent on light for effective operation.
  • the system enables the road user to make intelligent, pro-active decisions to enable him or her to avoid collisions with motor vehicles which may otherwise have been unavoidable. These decisions can be made as a result of the fact the real-time dynamic attributes of the sensed objects approaching the road user are available and can be utilized in real time before the accident occurs.
  • the secondary warning device will also provide additional warning to approaching motor vehicles, particularly in high collision risk scenarios and unlike previous technologies will indicate, at least to an extent, the degree of impending danger.
  • the secondary warning device will not be a continuous warning of the presence of the road user and will as such be less likely to be ignored by approaching motor vehicles.
  • the secondary warning device may only be activated in high collision likelihood scenarios and will as such be an indication to the motorist that immediate evasive action is required.
  • warning device may take on a variety of different embodiments such as other illuminated devices or even mechanical dials.
  • the system may be used by road users other than cyclists such as, for example, pedestrians, recreational road users and construction workers.
  • the sensor may be provided with attachment formations to enable it to be carried or worn on the back by the person.
  • This alternative embodiment may also utilise alternative warning devices such as mechanical actuators, buzzers or even devices capable of delivering a mild electrical shock or other tactile warning to the user to indicate levels of threat and likelihoods of collisions. These warning devices may be secured to appropriate places of the user's body where it will be sure to get the user's attention. In some cases the warning device may also produce and audible warning signal.
  • the system may or may not still make use of the secondary warning device for warning incoming objects of the likelihood of a collision occurring.
  • the system of the invention may also be adapted to integrate with existing electronic appliances frequently worn by road users, in particular recreational users.
  • These appliances may include cellular phones, portable music players such as MP3 players, l-pods®, portable global positioning systems especially adapted for training purposes, exercise equipment such as heart rate monitors, wrist watches, trip counters, bicycle computers and bicycle speedometers to name but a few.
  • the warning devices may be incorporated in the appliances and the output of the controller or processor directly may be conveyed to the appliances and appropriate warning indicators activated on standard displays, sound or movement actuators or the like.
  • the warning device may likewise by placed in any convenient location such as, for example, in a cyclist's helmet or incorporated in sunglasses or other protective eyewear worn by the cyclist.
  • the warning devices may be incorporated in units configured to be positioned at the extremities of the bicycle's handle bars, in which case they may provide warning signals to the cyclist and other motorists alike.
  • the system may also incorporate an accelerometer in communication with the processor and configured to detect when a cyclist has been involved in an accident or collision. The system may then transmit a distress signal by means of an appropriate transmission mechanism.
  • the distress signal may, for example, include a vehicle identifier or GPS coordinates of where the accident occurred.
  • the accelerometer may also cause the warning lights of the system to go into a continuous flashing state once an accident has been detected. This will make the bicycle more visible and increase the chances of the potentially injured cyclist being located and assisted quickly, particularly in low light conditions.
  • the system according to the invention not only warns its user of impending threats and possible collisions, but also of any objects approaching it from outside his or her normal field of vision. These features also make the system useful in situations where, for example, a cyclist wishes to change lanes or cross busy intersections.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Traffic Control Systems (AREA)

Abstract

L'invention concerne un système d'avertissement (1) pour une utilisation par un utilisateur d'une route, généralement un piéton ou un cycliste. Le système d'avertissement (1) comprend un capteur (3) capable de détecter la présence et le déplacement d'objets dans une direction qui n'est pas normalement dans le champ de vision de l'utilisateur de la route, et un processeur électronique (5) capable d'identifier des objets s'approchant de l'utilisateur de la route dans cette direction et de calculer un niveau de menace associé à des objets s'approchant de l'utilisateur de la route. Le système comprend également un dispositif d'avertissement (8) configuré pour recevoir des signaux de commande du processeur (5) et pour produire un signal d'avertissement pour l'utilisateur de la route dont l'intensité est proportionnelle au niveau de menace calculé par le processeur (5).
PCT/IB2011/002974 2010-12-13 2011-12-08 Système et procédé d'avertissement précoce de collision WO2012080799A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2010/08935 2010-12-13
ZA201008935 2010-12-13

Publications (1)

Publication Number Publication Date
WO2012080799A1 true WO2012080799A1 (fr) 2012-06-21

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014203361B3 (de) * 2014-02-25 2015-06-18 Klaus W. Hentges Fahrradabstandsabtastvorrichtung und System zur Detektion von Unfallschwerpunkten im Straßenverkehr
GB2538614A (en) * 2015-04-01 2016-11-23 Atsu Valentine Cycling glove
US9771071B2 (en) 2015-11-19 2017-09-26 Ford Global Technologies, Llc Dynamic lane positioning for improved biker safety
US10096224B1 (en) 2016-11-03 2018-10-09 Auburndale Partners, LLC Apparatus and method for detection of movement behind wearer of wearable device and signal
EP3421340A1 (fr) * 2017-06-29 2019-01-02 Guan Hung Technology Co., Ltd. Dispositif d'éclairage de bicyclette
BE1025750B1 (nl) * 2017-12-04 2019-07-04 Detectin Traffic Bvba Elektronisch waarschuwingssysteem voor een fiets dat bedoeld is om verkeersongevallen te vermijden
US20190256162A1 (en) * 2018-02-21 2019-08-22 Timothy Denholm Bicycle safety apparatus and methods
WO2021076137A1 (fr) * 2019-10-17 2021-04-22 Google Llc Système radar basé sur un dispositif intelligent pour opérations de véhicule

Citations (1)

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Publication number Priority date Publication date Assignee Title
US6731202B1 (en) * 2001-02-28 2004-05-04 Duane Klaus Vehicle proximity-alerting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6731202B1 (en) * 2001-02-28 2004-05-04 Duane Klaus Vehicle proximity-alerting device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014203361B3 (de) * 2014-02-25 2015-06-18 Klaus W. Hentges Fahrradabstandsabtastvorrichtung und System zur Detektion von Unfallschwerpunkten im Straßenverkehr
GB2538614A (en) * 2015-04-01 2016-11-23 Atsu Valentine Cycling glove
GB2538614B (en) * 2015-04-01 2018-06-06 Atsu Valentine Cycling glove
US9771071B2 (en) 2015-11-19 2017-09-26 Ford Global Technologies, Llc Dynamic lane positioning for improved biker safety
US10332374B2 (en) 2016-11-03 2019-06-25 Aubumdale Partners, LLC Apparatus and method for detection of movement behind wearer of wearable device and signal
US10096224B1 (en) 2016-11-03 2018-10-09 Auburndale Partners, LLC Apparatus and method for detection of movement behind wearer of wearable device and signal
EP3421340A1 (fr) * 2017-06-29 2019-01-02 Guan Hung Technology Co., Ltd. Dispositif d'éclairage de bicyclette
BE1025750B1 (nl) * 2017-12-04 2019-07-04 Detectin Traffic Bvba Elektronisch waarschuwingssysteem voor een fiets dat bedoeld is om verkeersongevallen te vermijden
US20190256162A1 (en) * 2018-02-21 2019-08-22 Timothy Denholm Bicycle safety apparatus and methods
US10668971B2 (en) * 2018-02-21 2020-06-02 Timothy Denholm Bicycle safety apparatus and methods
WO2021076137A1 (fr) * 2019-10-17 2021-04-22 Google Llc Système radar basé sur un dispositif intelligent pour opérations de véhicule
US20220334247A1 (en) * 2019-10-17 2022-10-20 Google Llc Smart-Device-Based Radar System for Vehicle Operations
EP4163673A1 (fr) * 2019-10-17 2023-04-12 Google LLC Système radar basé sur un dispositif intelligent pour opérations de véhicule

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