CN106652507B - Method and device for detecting and identifying traffic signal lamp based on RFID - Google Patents
Method and device for detecting and identifying traffic signal lamp based on RFID Download PDFInfo
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- CN106652507B CN106652507B CN201710065161.2A CN201710065161A CN106652507B CN 106652507 B CN106652507 B CN 106652507B CN 201710065161 A CN201710065161 A CN 201710065161A CN 106652507 B CN106652507 B CN 106652507B
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- 230000009471 action Effects 0.000 claims abstract description 16
- 238000012216 screening Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
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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
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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
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Abstract
The invention discloses a method and a device for detecting and identifying traffic signal lamps based on RFID. The method comprises the following steps: step S1: uploading vehicle information to a console to represent the online state of the vehicle; receiving a driving action command sent by a control console and state information of all intersection traffic lights; step S2: when a vehicle passes near a traffic signal lamp, receiving current intersection information sent by RFID devices arranged around the traffic signal lamp, and determining the current position of the vehicle by the vehicle through the received current intersection information; step S3: and determining the state of the traffic lights of the current intersection by using the state information of the traffic lights of all intersections received from the console according to the current position of the vehicle, and driving according to the driving action command received from the console.
Description
Technical Field
The invention relates to the technical field of vehicle auxiliary driving, in particular to a method and a device for detecting and identifying a traffic signal lamp based on RFID.
Background
One of important information indicators in traffic signals is a typical characteristic of urban road environment, the traffic signal lamp is identified in advance, intelligent measurement is facilitated to plan a path in advance, and intelligent detection and identification have immeasurable effects. Therefore, the traffic signal lamp identification technology has important significance and good application and popularization prospects.
Methods of traffic signal light detection and identification are generally classified into computer vision methods and communication methods. Computer vision methods refer to the determination of the vehicle after digital image processing of the image and then information about the shape and color is obtained. The method has the disadvantages that the method is easily influenced by illumination, weather change and surrounding complex environment, and information errors are caused.
The communication method is that the information about the traffic signal lamp is transmitted to the vehicle by the network in a communication mode, and the vehicle makes the next driving order according to the received information. The method has the advantage that the method can not be influenced by illumination, weather change and surrounding complex environment. The information is more accurate.
Disclosure of Invention
The invention aims to provide a method and a device for detecting and identifying traffic signal lamps based on RFID. For the purpose of information validity, timeliness and accuracy. The vehicle firstly transmits the on-line information of the vehicle to the console in a UDP (user Datagram protocol) broadcasting mode, and after the console receives the on-line information of the vehicle, the console continuously transmits the state information and the driving command information of all traffic signal lamps to the vehicle in the UDP broadcasting mode. Therefore, the vehicle can receive the state information and the driving command of the traffic signal lamps of all the intersections at all times. And RFID devices are arranged around traffic lights at the intersection. RFID, i.e., radio frequency identification, is generally microwave, has a frequency of 1-100GHz, and is suitable for short-distance identification communication. The RFID has the characteristics of high identification speed, large data capacity, long service life, dynamically changeable tag data and dynamic real-time communication. By means of the characteristics, the RFID is adopted to send intersection information to the vehicles, after the vehicles obtain the current intersection information, the state information and the driving command information of the traffic signal lamps sent from the control console are screened out according to the intersection information transmitted by the RFID, and corresponding command actions are made.
The invention provides a method for detecting and identifying traffic signal lamps based on RFID, which comprises the following steps:
step S1: uploading vehicle information to a console to represent the online state of the vehicle; receiving a driving action command sent by a control console and state information of all intersection traffic lights;
step S2: when a vehicle passes near a traffic signal lamp, receiving current intersection information sent by RFID devices arranged around the traffic signal lamp, and determining the current position of the vehicle by the vehicle through the received current intersection information;
step S3: and determining the state of the traffic lights of the current intersection by using the state information of the traffic lights of all intersections received from the console according to the current position of the vehicle, and driving according to the driving action command received from the console.
The invention also provides a device for detecting and identifying the traffic signal lamp based on the RFID, which comprises:
the information interaction module is used for uploading the vehicle information to the console so as to represent the online state of the vehicle; receiving a driving action command sent by a control console and state information of all intersection traffic lights;
the position determining module is used for receiving current intersection information sent by RFID devices arranged around the traffic signal lamp when the vehicle passes by the vicinity of the traffic signal lamp, and determining the current position of the vehicle through the received current intersection information;
and the command execution module is used for determining the states of the traffic lights at the current intersection by using the state information of all the intersection traffic lights received from the control console according to the current position of the vehicle and driving according to the driving action command received from the control console.
The invention has the following effects: the invention designs a method for detecting and identifying traffic signal lamps by using RFID and UDP broadcasting. The method provides the current intersection information to the vehicles arriving at the intersections by using an RFID method, so that the vehicles can know which intersection the vehicles are at. The RFID is a radio frequency identification, generally adopts a microwave mode, has the frequency of 1-100GHz and is suitable for short-distance identification communication. By using the characteristic of the RFID, the discrimination capability of the vehicle is accurate only in the coverage range of the RFID. That is, only when the vehicle comes within the range covered by the RFID can the information about the current intersection be received, in preparation for the information sent by the screening console. Meanwhile, information is exchanged between the vehicle and the console in a UDP broadcast mode. UDP supports one-to-one, one-to-many, many-to-one, and many-to-many interactive communications relative to the TCP protocol. For the console and 21 vehicles, it is more appropriate to use UDP broadcasting. The online information of the vehicle is transmitted to the console, and the console is informed of the IP address and the port number of the vehicle. Thus, the console can broadcast the state information of the traffic lights and the driving command information to the on-line vehicles. This also avoids the need to transmit information to vehicles that are not on-line.
Drawings
FIG. 1 is an overall flow chart of the present invention;
FIG. 2 is a UDP broadcast flow chart of the present invention;
fig. 3 is a flow chart of RFID transmission according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
The invention relates to a traffic signal lamp identification method based on RFID and used in the field of vehicle auxiliary driving or automatic driving. The invention can obtain the intersection information of the vehicle from the RFID device arranged near the intersection traffic light, thereby judging the position of the vehicle. The invention transmits the traffic signal lamp state, driving command, speed information, driving distance information and the like of all intersections between vehicles and a control console through UDP broadcast. All information is obtained by the vehicle on line in a UDP (user Datagram protocol) broadcasting mode, and then the current intersection information is screened through the intersection information transmitted by the RFID to obtain the finally required information. The invention is characterized in that the traffic signal lamp is identified by using a communication mode, thereby avoiding errors caused by illumination, weather and the like in computer vision and improving the accuracy.
The invention comprises three processing processes of UDP broadcast transmission information, RFID transmission information and UDP broadcast screening information in sequence, wherein the UDP broadcast screening is completed after the UDP broadcast transmission information and the RFID transmission information are obtained. As shown in fig. 1, the method for identifying a traffic signal lamp includes the following steps:
step S1: the vehicle uploads vehicle information such as self speed information, license plate information, vehicle state information, driving distance information and command information to a control console in a UDP (user datagram protocol) broadcasting mode to show that the vehicle is on line. And reports its own IP address and port to the console. And receiving driving action commands and state information of all intersection traffic lights from the console;
step S2: the RFID device is arranged around the traffic signal lamp, when the vehicle passes near the traffic signal lamp, the current information about the intersection sent by the RFID device is received, and the vehicle can know the specific position of the vehicle at present through the received intersection information;
step S3: according to the related intersection information obtained in the step S2, the vehicle screens the related information obtained in the step S1, so that the state of the traffic lights at the current intersection and the following driving commands can be known.
The method for receiving the driving action command and the state information of all intersection traffic lights in the UDP broadcast mode comprises the following steps:
step S111: representing the driving action command and the state information of all the intersection traffic lights by hexadecimal numbers;
step S112: the vehicle uploads the speed information, license plate information, vehicle running state (including straight running, turning, obstacle encountering, parking and the like), running distance information and the like of the vehicle to the console to show that the vehicle is on line. And reports its own IP address and port to the console.
Step S113: and the console transmits all the information in the S111 to the vehicle in a UDP (user Datagram protocol) broadcasting mode by using hexadecimal numbers, so that the vehicle obtains the states of traffic lights at all intersections and driving commands including starting and stopping, left and right steering, turning around and overtaking and entering and exiting the vehicle.
The invention designs a mode of using UDP broadcast to carry out effective information transmission between a control console and a vehicle. Fig. 2 is a flow chart of the method. Firstly, the states of traffic lights, left-right turning running commands, starting stop commands, warehouse in and out commands, speed commands and running distance commands are expressed by hexadecimal numbers. The console and the vehicle judge the current vehicle state and the following driving action through the received hexadecimal number. After information is sent every time, check information with the length of one byte needs to be sent again, so that the information can be ensured to be more accurate. The vehicle sends the self on-line information, the IP address and the port information to the console through hexadecimal numbers, and then the console sends the state of the traffic signal lamp and the driving command to the on-line vehicle. This may prevent off-line vehicles from receiving the information.
In order to enable vehicles to accurately screen out the states of traffic lights and driving commands of the current intersection, the RFID device is arranged at each intersection provided with a traffic light, and the RFID device sends current intersection information to prepare for screening UDP broadcast information.
As shown in fig. 3, the step of transmitting information in the RFID manner is as follows:
the RFID transmits the current intersection information to the vehicles passing through the intersection. The vehicle can know the position of the intersection after obtaining the information. The coverage area of the RFID is relatively short, so that the information transmission is relatively accurate. And only when the vehicle enters the RFID coverage range of the current intersection, the information of the current intersection can be received.
After the vehicle receives the information sent by the RFID, the information of the current intersection in the UDP broadcast information can be screened out according to the intersection information. Therefore, the accuracy, effectiveness and timeliness of the information can be guaranteed.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for identifying a traffic signal based on RFID-based detection, comprising:
step S1: uploading vehicle information to a console to represent the online state of the vehicle; receiving a driving action command sent by a control console and state information of all intersection traffic lights;
step S2: when a vehicle passes near a traffic signal lamp, receiving current intersection information sent by RFID devices arranged around the traffic signal lamp, and determining the current position of the vehicle by the vehicle through the received current intersection information;
step S3: and determining the states of the traffic lights at the current intersection by using the state information of the traffic lights at all intersections received from the console according to the current position of the vehicle, and screening and driving according to the driving action commands received from the console.
2. The method for detecting a traffic signal according to claim 1, wherein the information is exchanged with the console by means of UDP broadcasting.
3. The method of detecting a traffic signal according to claim 1, wherein the vehicle information comprises: vehicle speed, license plate number, vehicle operating state, and distance traveled.
4. The method for detecting a traffic signal according to claim 1, characterized in that said driving action command comprises at least one of the following: starting, stopping, left steering, right steering, turning around, overtaking, leaving warehouse and warehousing.
5. The method of detecting a traffic signal according to claim 1, wherein the vehicle information further comprises: vehicle IP address and port number.
6. The method for detecting a traffic signal according to claim 1, wherein the information exchanged between the vehicle and the console is represented in hexadecimal and the last byte is a check bit.
7. The method for detecting a traffic signal according to claim 1, wherein the vehicle transmits the information to the console by means of UDP broadcasting and simultaneously transmits the IP address and the port number to the console, and the console transmits the information to the vehicle according to the IP address and the port number of the vehicle.
8. An apparatus for identifying traffic signal lamps based on RFID-based detection, comprising:
the information interaction module is used for uploading the vehicle information to the console so as to represent the online state of the vehicle; receiving a driving action command sent by a control console and state information of all intersection traffic lights;
the position determining module is used for receiving current intersection information sent by RFID devices arranged around the traffic signal lamp when the vehicle passes by the vicinity of the traffic signal lamp, and determining the current position of the vehicle through the received current intersection information;
and the command execution module is used for determining the states of the traffic lights at the current intersection by using the state information of the traffic lights at all intersections received from the control console according to the current position of the vehicle, and screening the traffic lights for driving according to the driving action commands received from the control console.
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| CN201710065161.2A CN106652507B (en) | 2017-02-04 | 2017-02-04 | Method and device for detecting and identifying traffic signal lamp based on RFID |
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| CN201710065161.2A CN106652507B (en) | 2017-02-04 | 2017-02-04 | Method and device for detecting and identifying traffic signal lamp based on RFID |
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| CN113299101A (en) * | 2021-06-01 | 2021-08-24 | 湖北杰纳动力科技有限公司 | Intelligent sand table traffic display system and control method |
| CN113593270B (en) * | 2021-08-17 | 2022-08-16 | 广州小鹏汽车科技有限公司 | Vehicle driving control method, control device, and storage medium |
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