CN113724515B - System for transmitting emergency traffic event by using street lamp - Google Patents
System for transmitting emergency traffic event by using street lamp Download PDFInfo
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- CN113724515B CN113724515B CN202010447560.7A CN202010447560A CN113724515B CN 113724515 B CN113724515 B CN 113724515B CN 202010447560 A CN202010447560 A CN 202010447560A CN 113724515 B CN113724515 B CN 113724515B
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- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- Computer Networks & Wireless Communication (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention relates to a system for transmitting emergency traffic events by using street lamps, which comprises: an emergency traffic event generating system for generating an emergency traffic event message; an emergency traffic event service system for receiving the emergency traffic event; the street lamp comprises an integrated optical communication system arranged in a street lamp, wherein the optical communication system is in optical communication with an automobile; an optical communication system integrated in the automobile, the optical communication system being in optical communication with the street lamp; the traffic event information generated by the emergency traffic event generation system is sent to the traffic event service system, the traffic event service system distributes the information containing the emergency traffic event to the street lamps, and the street lamps distribute the emergency traffic event information to the automobiles within the communication range of the street lamps through the optical communication system. The invention can transmit traffic information through the street lamp, so that the rear vehicle can timely notice and take countermeasures when an emergency traffic incident occurs.
Description
Technical Field
The invention belongs to the field of street lamps, and particularly relates to a technical improvement for transmitting road condition information by using street lamps to communicate and avoiding traffic accidents.
Background
On urban elevated roads or highways, the running speed of the automobile is usually more than 80 km/h, and secondary accidents often occur because drivers cannot predict the forward traffic accidents to continue running at night or in bad weather.
For example, the front vehicle is anchored in the center of the road, and the driver does not turn on the warning light for various reasons, so that the driver of the rear vehicle does not notice the vehicle, and cannot brake in advance, thereby causing a rear-end collision accident.
Or the driver of the front vehicle turns on the warning lamp, but the driver of the rear vehicle does not pay attention to the driving, so that the driver can not brake in advance, and the rear-end collision accident is caused.
Or the situation that the front road suddenly gets jammed, although no traffic accident happens, the traffic hidden trouble is caused because the driver behind can not know the actual situation and the driver emotion fluctuation occurs.
Or a traffic accident occurs in one of the multiple lanes, the rear vehicle cannot be predicted in advance, and appropriate lane changing measures are adopted to further cause a long-time traffic jam condition.
These problems are caused by the fact that the driver cannot know the emergency traffic incident in advance and cannot make operations such as attention, avoidance, deceleration and the like in advance.
Disclosure of Invention
In view of the above, the present invention provides a communication system capable of enabling a driver to predict forward traffic information in advance, which communicates with a vehicle carrying emergency traffic event information using an optical communication system integrated in a street lamp, and notifies the driver of the vehicle through devices in the vehicle.
The invention also provides a method for reminding the driver of the emergency traffic event by sending the warning through the street lamp, thereby attracting the attention of the driver and avoiding the occurrence of the secondary traffic accident.
The invention also provides an optical communication mode of the street lamp and the automobile, which is realized by communicating the lighting system of the automobile with the optical communication mode
In order to solve the above technical problems, the present invention provides a system for transmitting an emergency traffic event by using a street lamp, comprising:
an emergency traffic event generating system for generating an emergency traffic event;
the emergency traffic event service system is used for receiving the emergency traffic event;
the emergency traffic event system will receive traffic
The street lamp comprises an integrated optical communication system arranged in a street lamp, wherein the optical communication system is in optical communication with an automobile;
an optical communication system integrated in the automobile, the optical communication system being in optical communication with the street lamp;
the traffic event information generated by the emergency traffic event generation system is sent to the traffic event service system, the traffic event service system distributes the information containing the emergency traffic event to the street lamps, and the street lamps distribute the emergency traffic event information to the automobiles within the communication range of the street lamps through the optical communication system.
The traffic event generated by the emergency traffic event generating system is sent to the traffic emergency traffic event message service system, the emergency traffic event message service system transfers the emergency traffic event message to the automobile which can be irradiated by the street lamp through the optical communication system, and the automobile reminds the driver after receiving the emergency traffic event message, so that the driver is promoted to take positive driving measures to avoid secondary traffic accidents.
As a preferred embodiment, the emergency traffic event triggering module sends an emergency traffic event message to the adjacent street lamp through the optical communication system after being triggered.
As a preferred embodiment, after the adjacent street lamp receives the emergency traffic event message, the emergency traffic event message is sent to an emergency traffic event server, the emergency traffic event server sends the emergency traffic event to a street lamp far away from the vehicle sending the emergency traffic event, and the street lamp far away from the vehicle sending the emergency traffic event sends the emergency traffic event to the adjacent vehicle through an optical communication system.
As a preferred embodiment, the emergency traffic event message includes location information of the emergency traffic event; the emergency traffic event service system sends an emergency traffic event message to the street lamp behind the position.
As a preferred embodiment, the emergency traffic event service system sends an emergency traffic event message containing first warning content to a street lamp within a safe distance behind the location; and sending an emergency traffic event message containing second warning content to the street lamp outside the rear safety distance of the position; the street lamp sends out a first warning or a second warning according to the warning content.
As a preferred embodiment, the emergency traffic event service system includes an event type, and the street lamp generates a corresponding warning according to the type of the emergency traffic event after receiving the emergency traffic event.
As a preferred embodiment, the emergency traffic event generating system includes a road surface information sensing part installed at a periphery of a road; the road information sensing part is used for sensing road information and sending an emergency traffic event message to the emergency traffic event service system when a traffic event occurs.
As a preferred embodiment, the optical communication system includes a control circuit for processing data generated by an emergency traffic event message; an optical communication module coupled to the control circuit, and an optical signal transmitter and an optical signal receiver; the control circuit transmits data to the optical communication module, and the optical communication module and the optical signal transmitter convert the emergency traffic event data into optical signals; the optical signal receiver is configured to receive an optical signal and convert the optical signal into emergency traffic event message data.
As a preferred embodiment, the optical communication module modulates the emergency traffic event message data into an optical signal transmitter strobe signal.
As a preferred embodiment, the optical communication system integrated in the vehicle is integrated with the vehicle lamp.
Drawings
Fig. 1 is a schematic overall diagram of a system for delivering emergency traffic events using street lamps.
Fig. 2 is a sequence diagram of emergency traffic event message generation, processing, and forwarding.
FIG. 3 is an in-car emergency traffic event generating system.
FIG. 4 is a flow chart for an automobile generating an emergency traffic event message.
Fig. 5 is a schematic diagram of an optical communication system architecture.
Fig. 6 is a schematic diagram of an optical communication system architecture integrated with a street lamp.
Fig. 7 is a schematic diagram of an emergency traffic event message processing and delivery flow.
Fig. 8 is a schematic diagram of another real-time scenario of a system for delivering emergency traffic events using street lamps.
Fig. 9 is a schematic diagram of another real-time scenario for emergency traffic event message processing and delivery flows.
Fig. 10 is a schematic illustration of an automated process flow performed by a vehicle after receiving an emergency traffic event message.
Detailed Description
A preferred construction system 100 for a system for delivering emergency traffic events with street lamps of the present invention is shown in fig. 1 and 2, wherein fig. 1 and 2 represent a physical schematic and a logical schematic, respectively, of the actual construction of the system.
The system 100 for delivering emergency traffic events using street lamps according to the present invention includes an emergency traffic event generating system for generating emergency traffic event messages, which may be integrated in a vehicle 104, may be provided on a street lamp post, and may be integrated with a street lamp in the form of a button 122. The emergency traffic event service system for receiving the emergency traffic event, which is deployed in a server 118, may exist in the form of application software, application specific integrated circuits, computer firmware, etc.; the server 118 communicates with the image analysis system by known communication methods, such as communication link 102 formed by the internet, a local area network, bluetooth, infrared communication, ultrasound, etc. An optical communication system 120 integrated in the street lamp, the optical communication system being in optical communication with the automobile; an optical communication system integrated in the automobile, the optical communication system being in optical communication with the street lamp; an optical communication uplink 126 and downlink 128 are formed between the street lamp and the car for emergency traffic event message communication between the street lamp and the car. The traffic event message generated by the emergency traffic event generation system is sent to the traffic event server 118, and the traffic event service system distributes the message containing the emergency traffic event to the street lamps, which distribute the emergency traffic event message to the vehicles within the communication range of the street lamps through the downlink 132 of the optical communication system.
The system 200 for delivering emergency traffic events with reference to the lamp of fig. 2 comprises an emergency traffic event generating system 202 for generating an emergency traffic event message 204, said emergency traffic event message 204 being sent to an emergency traffic event service system 206, the emergency traffic event service system 206 sending a message containing the emergency traffic event to a street lamp 208, which in turn is sent via an optical communication system to a car 210 which can be reached within its optical communication range. The communication range of the optical communication system described with reference to fig. 1 is determined by factors such as the intensity of the optical signal and the sensitivity of the sensor in the optical communication system, so as to ensure that the effective optical signal of the optical communication can be irradiated to the nearby automobile 104 or reference numeral 108 in fig. 1. The communication distance of the optical communication system in the present invention may be in the range of several meters to several kilometers, for example, a possible communication distance of the optical communication system is 500 meters.
The emergency traffic event generation system 202 described with reference to fig. 1 may be implemented for one or more of a variety of different systems. For example, the emergency traffic event generating system may be a camera 110 mounted above a city road, the camera 199 capturing road 112 vehicle information and transmitting image data to an image analysis system 116, where the presence of an emergency traffic event generates an emergency traffic event message that is transmitted to a server 118 for deployment of an emergency traffic event service system. Such as a rear-end traffic accident on a road, the image analysis system 116 concludes the traffic accident by analyzing factors such as stopping the driving of the accident vehicle, flashing an emergency warning light, etc., and generates a traffic accident event message 204, which is one of many types of emergency traffic events. Also, for example, a vehicle (e.g., a sweeper truck or an obstacle-removing truck, etc.) traveling too far below the speed limit in a lane is analyzed by the image analysis system 116. The image analysis system 116 generates an over-speed message, which is one of many types of emergency traffic events. The image analysis system 116 may also classify road conditions, such as road maintenance, vehicle violations, traffic jams, etc., that are detrimental to driving and traffic safety, as corresponding emergency traffic events.
As another example, the emergency traffic event generating system may be a button 122 provided on a road or street lamp 120 and its corresponding control system. An emergency traffic event button 122 is provided, for example, on a light pole, said emergency traffic event button 122 being triggered by the driver of the accident vehicle pressing after the traffic accident. The circuitry for sensing the button 122 senses that the button 122 has been pressed and transmits the emergency traffic event to the emergency traffic event service system via the communication system. The button 122 may be provided with a plurality of emergency traffic events corresponding to different types, and the button 122 may be provided with emergency traffic events of types such as vehicle break-down, occurrence of traffic accident, etc.
For another example, the emergency traffic event generating system includes a road surface information sensing part installed around the road 112; the road information sensing part is used for sensing road information and sending an emergency traffic event message to the emergency traffic event service system when a traffic event occurs. These sensors may include speed sensors, vehicle passing sensors, etc., in addition to the cameras and image analysis systems described above.
As another example, the emergency traffic event generating system may be an emergency traffic event triggering module integrated within an automobile. The in-car emergency traffic event triggering module integrates a sensor module 300 for collecting vehicle information. The processor judges the state of the vehicle according to the vehicle information and generates an emergency traffic event message when the vehicle has an emergency traffic event. The sensor module 300 includes a gyroscope 302, an acceleration sensor 304, a collision sensor 306, a sound sensor 308, and a vehicle speed sensor 312, as shown in fig. 2. A GPS module is also included for locating the vehicle position, and for driver triggered emergency buttons. The processor 316 is an embedded processor, a general purpose processor, an application specific integrated circuit, an FPGA, or the like. For example, the processor 316 is configured to execute an emergency traffic event control procedure, which in one preferred embodiment is a processor with a plurality of instruction codes that detect an emergency traffic event and issue an emergency traffic event message in accordance with the procedure shown in fig. 4. The process comprises the following steps: knowing the sensor data 402, analyzing the sensor data 404, the process determines whether an emergency traffic event has occurred 406. It is determined via flow 406 that an emergency traffic event message 408 is generated including the type of emergency traffic event based on the type of emergency traffic event if an emergency traffic event occurs, and the sensor data 402 continues to be sensed if no emergency traffic event message occurs.
The process of determining whether an emergency traffic event has occurred includes various methods, such as determining that an emergency traffic event, including a collision, has occurred if the acceleration change sensed by the acceleration sensor is greater than a set threshold and the collision sensor detects a collision signal in process 406, and generating a message including the emergency traffic event, in process 408. In a flow 408, the processor 316 is coupled to the GPS module, and the processor 316 generates the crash event message to include GPS location information for the occurrence of the emergency traffic event. In addition, the collision event message also comprises information such as time, vehicle model and the like.
In addition to automatically determining an emergency traffic event by the processor, in a preferred embodiment the processor 316 is coupled to an emergency button 320 on the vehicle, such as a dual flashing warning light button provided on the center console, which when pressed by the processor 316 generates an emergency traffic event message.
Fig. 5 shows an exemplary module structure of the optical communication module principle, in which a circuit shows its operating principle, from which an actual circuit can be different.
Referring to fig. 5, the processor generates an emergency traffic event message and transmits it outwardly through the optical communication module 318. A typical signal modulation method of the optical communication module is as follows: modulating binary data representing the emergency traffic event message into an LED strobe signal, wherein an LED light state indicates a transmit signal of 1 and an off state indicates a transmit signal of 0, the binary data being transmitted in a serial manner.
The optical communication module 318 includes an optical communication control circuit 502, as well as a light emitting diode 512 for transmitting signals and a photodiode 506 for receiving optical signals. The control end of the control MOS tube of the light emitting diode is connected with the output end of the optical communication circuit 502. The optical communication control circuit 502 is configured to modulate the emergency traffic event message data into a serial electrical signal 514, wherein the light emitting diode 512 emits light at a high level and the light emitting diode 512 does not emit light at a low level.
In a preferred embodiment the LEDs are shared with the vehicle's light assembly, enabling the emission of optical signals without affecting the illumination, for example, with the frequency of the LED strobe being greater than 15 HZ/sec, to achieve a flicker which is substantially invisible to the human eye without affecting the illumination. The frequency affects the communication efficiency, i.e. the higher the frequency the faster the speed of data transmission per unit time.
Wherein the LEDs may be used in common with LEDs used for automotive lighting, for example daytime running lights of an automobile, night time LEDs of a headlight are used as optical information emitters. In fig. 1, the illumination LED of the high beam of the vehicle is preferably used as the LED emitting the optical signal, so that the illumination intensity and the illumination distance of the high beam LED ensure the communication effect, and the optical sensor 506 integrated with the street lamp can receive the signal, and the optical sensor 506 is preferably a photodiode.
In a preferred embodiment, the optical communication module 318 may be implemented in software. The LED on-off state in modern automobiles is controlled by the processor 316 of the automobile, the LED strobe frequency can be set by software or hardware timers, and the software controls the state of the LED lights on or off as required by each bit of the transmitted data. The vehicle may send an emergency traffic event message to its neighboring street lamps using the vehicle lamp.
With continued reference to fig. 6, the optical communication control circuit 602 is further coupled to an optical sensor 606, the optical sensor 606 being configured to convert the optical signal into an electrical signal 616, the optical communication control circuit 602 converting the electrical signal into communication data.
Fig. 6 shows a schematic diagram of an integrated optical communication system in a street lamp, wherein the optical communication principle is the same as that of an integrated optical communication principle on a car.
Referring to fig. 6, the optical communication system using the same principle as the optical communication module on the car shown in fig. 5 is integrated on the street lamp. The optical communication system includes a control circuit 620 for processing data generated by the emergency traffic event message; an optical communication module 318 coupled to the control circuit 620, the optical communication module optical communication control circuit 620, and the optical signal emitting diode 612 and the optical signal receiving diode 606; the control circuit 620 communicates data to the optical communication control circuit 602, and the optical communication control circuit 602 and the transmitting diode 612 convert the emergency traffic event data into optical signals; the light signal receiving diode 612 is configured to receive light signals and convert the light signals into emergency traffic event message data.
Communication between the automobile and the street lamp, communication between the street lamp and communication between the automobile and the street lamp can be completed by utilizing the optical communication module 318.
The emergency traffic event generation system 202 described above transmits the emergency traffic event messages 204 it generates to the emergency traffic event service system 206 in various forms. The emergency traffic event message 204 includes, in addition to the location data and the emergency traffic event type data, a type code of a sender of the message 204, for example, a type code of an emergency traffic event system sent by an automobile is an encoding type of the automobile, and a type code of an emergency traffic event system sent by a street lamp is a street lamp. In a preferred embodiment, the emergency event message 204 also includes an identification code of the sender of the message, such as a frame number of an automobile, or a street light code.
The emergency traffic message generation system 202 conforms to the same communication protocol as the emergency traffic event service system 206. The emergency traffic service system comprises an analysis program 212, the analysis program 212 analyzes the emergency traffic event message 204, distributes the emergency traffic event message to the street lamp 120 according to a certain strategy after analyzing the emergency traffic event message, and distributes the street lamp 120 to the automobile through the optical communication system.
The emergency traffic event service system 206 may be a software system deployed on the background server 118.
The emergency traffic event service system 206, described with reference to fig. 2, parses the program 212 for extracting key information from the emergency traffic event message 204 according to the communication protocol, the key information being generated by the emergency traffic event message generation system 202. The contents of the emergency traffic event message 204 include, but are not limited to: information about the type of emergency traffic event (e.g., road maintenance, slow speed of involvement, rear-end collision, abnormal vehicle break-down), the location where the emergency traffic event occurred, e.g., GPS positioning data, and time of occurrence. The analysis program 212 of the emergency traffic event service system 206 calculates and analyzes the information and forwards the generated emergency traffic event message 216 to a specific street lamp, and the emergency traffic event message 216 can be added or subtracted from the original message 204, for example, the content of the street lamp 120 for sending the safety warning is added.
The emergency traffic event service system 206 may be configured to control the street lamps 120' within a safe distance L from the emergency traffic event occurrence location p to issue a first alert and control the street lamps (not shown) outside the safe distance L from the emergency traffic event occurrence location to issue a second alert. The warning can be sent out by means of sound, light and the like, the sound can be sent out by means of controlled loudspeaker equipment integrally installed on the street lamp, and the light can be realized by means of flashing, darkening or brightening.
An emergency traffic event service system such as that of fig. 7 issues an alert via street lamp flowchart 700, which is one exemplary implementation of an emergency traffic service system including resolution program 212. An emergency traffic event message is received in flow 702, which may be from a street lamp or directly from a car. The emergency traffic event server parses the message content in process 704, from which the location of the occurrence of the traffic event is known, such as the gps coordinates of the message content. In the process 706, the positions of all the street lamps within the safe distance L are calculated according to the position information, and the positions of the street lamps outside the safe distance are calculated at the same time; in process 708, a first frequency flashing code is sent to street lamps within a safe distance, the street lamps flashing, and a second frequency flashing code is sent to street lamps outside the safe distance, preferably the first frequency is greater than the second frequency. When a driver who is closer in the safety distance sees the street lamp to flash, the driver can predict that traffic accidents happen in front, and can make speed reduction, lane change and other evading driving operations in advance.
Fig. 8 is a schematic diagram of another embodiment of the present invention in which a central server is eliminated from the system of fig. 1, and an emergency traffic event service system is integrated with a street lamp.
The emergency traffic event service system 206 may be integrated with a plurality of the street lamps 120, with adjacent street lamps forming a forward communication link 802 and a backward communication link 804 via an optical communication system, the emergency traffic event service system 206 sending emergency traffic event messages to adjacent street lamps via the communication links 802, 804. Any of the plurality of street lamps 120 is capable of forwarding the content of the received emergency traffic event message to its preceding street lamp or the following street lamp, i.e. the emergency traffic event message is transmitted along the street lamp 120. And the street lamp which receives the emergency traffic event message is analyzed and responds according to the type of the emergency traffic event. The response action may also be different depending on the distance of the street lamp from the emergency traffic event occurrence point, for example, the street lamp calculates whether it is within the safe distance where the emergency traffic event occurs according to the location of the emergency traffic event contained in the message, blinks at the first frequency described above if it is less than the safe distance, and blinks at the second frequency if it is greater than the safe distance.
Referring to fig. 9, each emergency traffic event service system 900 of the plurality of the street lamp assemblies differs from the operational logic of the emergency traffic event service system illustrated in fig. 8 in that the emergency traffic event service system needs to determine whether or not it needs to respond to an emergency traffic service event itself. The method comprises the following steps: an emergency traffic event message 902 is received, which is generated by the emergency traffic event generation system described above. In flow 904, message content is parsed, the message content including: information about the type of emergency traffic event (e.g., road maintenance, slow speed of involvement, rear-end collision, abnormal vehicle break-down), the location where the emergency traffic event occurred, e.g., GPS positioning data, and time of occurrence. After receiving the message, the message is sent to the adjacent street lamp according to the direction transmitted by the communication links 802 and 804, and then the message content is analyzed after the transfer is completed in the flow 906. In the process 908, it is determined whether a response is required according to the analysis result, and if a response is required, a response action such as flashing is performed in the process 910. The response action 910 includes forwarding the message to the car under the street lamp via the optical communication links 828, 832, it being noted that the communication range of the street lamp is limited, i.e. the distance acceptable at the onboard optical communication system.
In a preferred scheme, the traffic event service system forwards the emergency traffic event along the direction opposite to the running direction of the automobile, so that the vehicle behind the emergency traffic event occurrence point can quickly learn the warning.
The traffic event service system integrated in the street lamps removes the central server, the lamps are independently operated in groups, the maintenance is simple, and the central server is removed, so that communication delay of the Internet and the like can be reduced.
The emergency traffic event message is forwarded to the vehicle via the emergency traffic event service system to the street lamp. The automobile receives the emergency traffic event message, and an emergency traffic event message response module arranged in the automobile responds to actions according to the content of the message, such as sounding a warning message, lighting and the like, or taking emergency braking actions.
The process of the car responding to an emergency traffic event will be explained with reference to fig. 10 by taking an emergency brake as an example. In the process 1002, the vehicle receives the emergency traffic event message sent by the street lamp, and in the process 1004, the distance between the street lamp 120' in communication with the vehicle and the place where the traffic event occurs is analyzed, and the distance can be sent to the vehicle after the calculation of the traffic event service system built in the street lamp is completed. At the same time, the car calculates a safe distance in combination with the vehicle speed at flow 1004. In flow 1006, it is determined whether the distance is greater than its own safe distance, if so, the vehicle speed is maintained and the emergency traffic event message sent by the next road lamp is continued to be accepted, and if it is less than the safe distance for execution of flow 1008, emergency braking is initiated.
Preferably, the emergency traffic event message comprises a GPS message, the vehicle locates its own position by using a vehicle-mounted GPS module after receiving the message, calculates the distance between itself and the emergency traffic event occurrence point according to its own position, calculates the safety distance according to the vehicle speed, compares the safety distance with the distance between the traffic event occurrence point, and starts emergency braking if the distance is smaller than the safety distance.
Claims (10)
1. A system for delivering emergency traffic events using street lamps, comprising:
an emergency traffic event generating system for generating an emergency traffic event;
an emergency traffic event service system for receiving the emergency traffic event;
the street lamp comprises an integrated optical communication system arranged in a street lamp, wherein the optical communication system is in optical communication with an automobile;
an optical communication system integrated in the automobile, the optical communication system being in optical communication with the street lamp;
the emergency traffic event information generated by the emergency traffic event generation system is sent to an emergency traffic event service system, the emergency traffic event service system distributes the information containing the emergency traffic event to the street lamps, and the street lamps distribute the emergency traffic event information to the automobiles within the communication range of the street lamps through the optical communication system;
the emergency traffic event service system is integrated with the street lamps, a forward communication link and a backward communication link are formed between adjacent street lamps through the optical communication system, and the emergency traffic event service system sends an emergency traffic event message to the adjacent street lamps through the communication links; any one of the street lamps can forward the received emergency traffic event message content to the previous street lamp or the next street lamp, so that the emergency traffic event message is transmitted along the street lamp;
the street lamp which receives and forwards the emergency traffic event information analyzes the content of the street lamp and responds according to the type of the emergency traffic event; the response actions are different according to the different distances between the street lamp and the emergency traffic incident occurrence point; the street lamp calculates whether the street lamp is within the safety distance of the emergency traffic event according to the position of the emergency traffic event contained in the message, and flashes at a first frequency if the street lamp is smaller than the safety distance and flashes at a second frequency if the street lamp is larger than the safety distance; the response action comprises forwarding the message to the car under the street lamp through the optical communication link at a limited distance acceptable to the vehicle-mounted optical communication system;
the method comprises the steps that an automobile receives an emergency traffic event message sent by a street lamp, the traffic event message is analyzed to comprise the distance between the street lamp communicating with the automobile and a traffic event place, and the automobile calculates a safety distance by combining the speed of the automobile; judging whether the distance is larger than the safety distance of the vehicle, if so, keeping the vehicle speed and continuously receiving an emergency traffic event message sent by the next road lamp, and if so, starting emergency braking;
the vehicle receives the information, then uses the vehicle-mounted GPS module to locate the position of the vehicle, and calculates the distance between the vehicle and the emergency point according to the position of the vehicle.
2. The system for delivering emergency traffic events using street lamps as recited in claim 1, wherein the emergency traffic event generating system comprises an emergency traffic event triggering module installed on a car, the emergency traffic event triggering module being triggered to transmit an emergency traffic event message to an adjacent street lamp through an optical communication system.
3. The system for delivering emergency traffic events using street lamps as set forth in claim 2, wherein the neighboring street lamps, after receiving the emergency traffic event message, transmit the emergency traffic event message to an emergency traffic event server, the emergency traffic event server transmitting the emergency traffic event to a street lamp remote from the vehicle from which the emergency traffic event was transmitted, the street lamp remote from the vehicle from which the emergency traffic event was transmitted transmitting the emergency traffic event to the neighboring vehicle through an optical communication system.
4. A system for communicating emergency traffic events using street lamps as set forth in claim 3, wherein the emergency traffic event message includes location information of the occurrence of the emergency traffic event; the emergency traffic event service system sends an emergency traffic event message to the street lamp behind the position.
5. The system for delivering emergency traffic events using street lamps as set forth in claim 4, wherein the emergency traffic event service system transmits an emergency traffic event message including a first warning content to street lamps within a safe distance behind the location; and sending an emergency traffic event message containing second warning content to the street lamp outside the rear safety distance of the position; the street lamp sends out a first warning or a second warning according to the warning content.
6. The system for delivering emergency traffic events using street lamps as set forth in claim 4, wherein the emergency traffic event service system, the emergency traffic event message comprises event type, and the street lamps generate corresponding warnings according to the type of the emergency traffic event after receiving the emergency traffic event.
7. The system for transmitting an emergency traffic event using a street lamp according to claim 1, wherein the emergency traffic event generating system comprises a road surface information sensing part installed at the periphery of the road; the road information sensing part is used for sensing road information and sending an emergency traffic event message to the emergency traffic event service system when a traffic event occurs.
8. The system for communicating emergency traffic events using street lamps as set forth in claim 1, wherein the optical communication system comprises a control circuit for processing data generated by the emergency traffic event message; an optical communication module coupled to the control circuit, and an optical signal transmitter and an optical signal receiver; the control circuit transmits data to the optical communication module, and the optical communication module and the optical signal transmitter convert the emergency traffic event data into optical signals; the optical signal receiver is configured to receive an optical signal and convert the optical signal into emergency traffic event message data.
9. The system for communicating emergency traffic events using street lamps of claim 8, wherein the optical communication module modulates the emergency traffic event message data into an optical signal transmitter strobe signal.
10. A system for communicating emergency traffic events using street lamps as claimed in any one of claims 1 to 9, wherein the optical communication system integrated in the vehicle is integrated with the vehicle lights.
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| CN108932860A (en) * | 2018-09-30 | 2018-12-04 | 三峡大学 | The method that road digital additional transport command signal system and system carry out traffic guidance |
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