WO2013082908A1 - Procédé, lecteur et système d'identification de numéro de voie de circulation - Google Patents

Procédé, lecteur et système d'identification de numéro de voie de circulation Download PDF

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Publication number
WO2013082908A1
WO2013082908A1 PCT/CN2012/074009 CN2012074009W WO2013082908A1 WO 2013082908 A1 WO2013082908 A1 WO 2013082908A1 CN 2012074009 W CN2012074009 W CN 2012074009W WO 2013082908 A1 WO2013082908 A1 WO 2013082908A1
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WO
WIPO (PCT)
Prior art keywords
information
reader
antenna
vehicle
signal
Prior art date
Application number
PCT/CN2012/074009
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English (en)
Chinese (zh)
Inventor
陈杰
徐运
刘珊
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2013082908A1 publication Critical patent/WO2013082908A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • 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]

Definitions

  • the present invention relates to the field of radio frequency identification application technologies, and in particular, to a method, a reader and a system for identifying a lane number. Background technique
  • Radio Frequency Identification technology is a non-contact automatic identification technology, commonly known as electronic tags. RFID technology automatically recognizes target objects and acquires relevant data through radio frequency signals. The identification work can be performed without manual intervention. a harsh environment.
  • RFID systems typically consist of a reader, an antenna, and a tag.
  • the tag (Tag) is composed of a coupling component and a chip, each tag has a unique electronic code attached to the object for identifying the target object;
  • a reader (Reader) is a device for reading tag information, and can be designed as a handheld device. Or fixed; Antenna is used to transmit RF signals between the tag and the reader.
  • the basic working principle of RFID technology is not complicated.
  • the tag When the tag enters the magnetic field, it receives the RF signal from the reader, and sends the product information stored in the tag chip by the energy obtained by the induced current.
  • the tag is a passive tag or Passive Tag; or the tag actively sends a signal of a certain frequency, the tag is an active tag or an active tag (Active Tag), the reader reads the information and decodes it, and sends it to the central information system for data. deal with.
  • RFID technology can recognize high-speed moving objects and recognize multiple tags at the same time, it has the advantages of quick and convenient operation. Therefore, RFID technology is widely used in urban intelligent transportation, such as electronic license plate recognition.
  • the vehicle report is required to be consistent with the lane number, and since the coverage area of the antenna included in the RFID technology is an ellipse, the antenna is different depending on the application requirements. The area covered will also change, as shown in Figure 1, The antenna corresponding to one lane can identify vehicles on adjacent or further lanes, and simultaneously report multiple vehicle information that are not in the same lane. Therefore, the existing RFID technology cannot correctly identify the lane number, thereby affecting the correct identification of the electronic license plate. Summary of the invention
  • the present invention provides a method, a reader and a system for identifying a lane number, which can be correctly identified, in order to solve the technical problem in the prior art that the lane number of the vehicle cannot be correctly recognized, thereby failing to realize the correct identification of the electronic license plate.
  • the lane number of the vehicle is located to ensure the correct identification of the electronic license plate.
  • the present invention provides the following solutions:
  • An embodiment of the present invention provides a method for identifying a lane number, where the method is applied to an RFID system.
  • the radio frequency identification system includes: a tag, a reader, and a plurality of antennas disposed in a vehicle; The antenna is disposed in the same reader or in different readers; the method includes:
  • the reader When the vehicle is traveling within the coverage of the reader antenna, the reader records information of the signal transmitted by the label according to a preset frequency, the information of the signal includes vehicle information identified by the label, and the signal is received Antenna information, time information of the reader receiving the signal, and information of RSSI generated when the antenna receives the signal;
  • the reader After the vehicle leaves the coverage of the reader antenna, the reader respectively obtains an accumulated value of the received signal strength generated by each antenna receiving the signal when the vehicle travels within the coverage of the reader antenna, and Determining that the vehicle is traveling in a lane corresponding to an antenna having the largest accumulated value of the received signal strength;
  • the reader reports the lane number information of the lane and the vehicle information.
  • the reader records information about a signal sent by the label at a preset frequency, which is:
  • the establishing record information is: establishing a hash hash table.
  • the reader when the reader records the information of the signal sent by the label according to a preset frequency, if the information of the signal corresponding to the vehicle already exists in the recorded information, the reader receives the signal in the recorded information.
  • the time information is updated to the time when the current signal is received, and the information of the received signal strength generated when the current signal is received is recorded;
  • the accumulated value of the received signal strength is:
  • the reader determines that the vehicle is away from the reader antenna coverage.
  • the antenna information includes lane number information corresponding to the antenna, reader information of the antenna, and serial number information of the antenna in the associated reader;
  • the reader After the vehicle leaves the coverage of the reader antenna, the reader separately obtains an accumulated value of the received signal strength generated by each antenna, and determines that the vehicle corresponds to the antenna with the largest accumulated value of the received signal strength.
  • Driving in the lane for:
  • the reader obtains the accumulated value of the received signal strength generated by the antenna set by itself, or accumulates the accumulated value of the received signal strength generated by the antenna set by the reader and the received signal strength generated by the antenna set by other readers. And determining that the vehicle is traveling in a lane corresponding to an antenna having the largest accumulated value of the received signal strength.
  • the reader does not report the lane number information of the lane and the vehicle information.
  • An embodiment of the present invention further provides a reader for identifying a lane number, where the reader is disposed on
  • a radio frequency identification (RFID) system the radio frequency identification system includes a tag, a reader, and a plurality of antennas disposed in a vehicle; the plurality of antennas are disposed in the same reader or different readers; include:
  • a recording module configured to record information of a signal sent by the label according to a preset frequency when the vehicle is traveling within an antenna coverage of the reader, where the information of the signal includes the identifier of the label Vehicle information, antenna information for receiving the signal, time information for the reader to receive the signal, and received signal strength RSSI information generated when the antenna receives the signal;
  • a determining module configured to receive, after the vehicle is driven away from the coverage of the reader antenna, each of the antennas receiving the signal when the vehicle is traveling within the coverage of the reader antenna An accumulated value of the signal strength, and determining that the vehicle is traveling in a lane corresponding to an antenna having the largest accumulated value of the received signal strength;
  • the reporting module is configured to report lane number information of the lane and the vehicle information.
  • the recording module is further configured to: when it is determined that the information of the signal corresponding to the vehicle already exists in the recorded information, The time information is updated to the time when the current signal is received, and the information of the received signal strength generated when the current signal is received is recorded;
  • the accumulated value of the received signal strength is:
  • the received signal strengths recorded in the record information corresponding to one antenna are added and obtained.
  • the determining module is configured to determine that the vehicle is driving away from reading when the difference between the current time and the time when the reader receives the signal in the recorded information recorded by the recording module is greater than or equal to a preset value. Antenna coverage.
  • the plurality of readers transmit the respective received signal strengths through the transmission mode of the user data packet protocol UDP. a value, and antenna information and vehicle information corresponding to the accumulated value of the received signal strength, where the antenna information includes lane number information corresponding to the antenna, reader information to which the antenna belongs, and sequence number information of the antenna in the associated reader;
  • the determining module is configured to obtain an accumulated value of the received signal strength generated by the antenna set by the reader, or obtain an accumulated value of the received signal strength generated by the antenna set by the reader and an antenna set by another reader.
  • the generated accumulated value of the received signal strength is determined, and the vehicle is judged to be traveling in a lane corresponding to the antenna having the largest accumulated value of the received signal strength.
  • the reporting module does not report the lane number information of the lane and the vehicle information.
  • An embodiment of the present invention further provides a system for identifying a lane number, the system adopting a radio frequency identification (RFID) technology; the system includes a tag, a reader, and a plurality of antennas disposed in a vehicle; In the same reader or in different readers;
  • RFID radio frequency identification
  • the reader is configured to record, when the vehicle is traveling within its own antenna coverage, information of a signal sent by the label according to a preset frequency, where the information of the signal includes vehicle information identified by the label Receiving antenna information of the signal, time information of the reader receiving the signal, and received signal strength RSSI information generated when the antenna receives the signal; the reader is further configured to: when the vehicle leaves the vehicle After the antenna coverage, obtaining an accumulated value of the received signal strength generated by each antenna receiving the signal when the vehicle is traveling within its own antenna coverage, and determining the accumulated value of the received signal strength of the vehicle Driving in the lane corresponding to the largest antenna; also used to report the lane number information of the lane and the vehicle information.
  • the present invention provides a method, a reader and a system for recognizing a lane number.
  • the reader records the label according to a preset.
  • Information of a signal transmitted by a frequency, the information of the signal including the label The identified vehicle information, the antenna information receiving the signal, the time information of receiving the signal, and the received signal strength (RSSI) information generated by the antenna when receiving the signal; when the vehicle leaves the reader antenna coverage Thereafter, the reader respectively obtains an accumulated value of the received signal strength generated by each antenna receiving the signal when the vehicle is traveling within the coverage of the reader antenna, and determines an accumulated value of the received signal strength of the vehicle.
  • the largest antenna corresponds to the driving in the lane; the reader reports the lane number information of the lane and the vehicle information.
  • the invention can correctly identify the lane number of the vehicle, thereby ensuring the correct identification of the electronic license plate.
  • Figure 1 is a schematic diagram of an existing lane number identification technology
  • FIG. 2 is a schematic structural diagram of a system for identifying a lane number according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a reader according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart 1 of a specific implementation process for identifying a lane number according to an embodiment of the present invention
  • FIG. 5 is a second schematic diagram of a specific implementation process for identifying a lane number according to an embodiment of the present invention.
  • the embodiment of the invention provides a system for identifying a lane number, and the system can be specifically a radio frequency identification RFID system.
  • the system may specifically include a tag 21 disposed in a vehicle, a lane number identifying device 22, and a plurality of antennas 23.
  • the system implements interface specifications and information scheduling between component devices based on the Low Level Read Protocol (LLRP).
  • LLRP Low Level Read Protocol
  • the tag 21 may be specifically configured to send a signal to the identified lane number device 22 at a preset frequency.
  • the tag 21 can be a passive tag or an active tag.
  • the identification of the lane number device 22, which may be a reader, as shown in FIG. 3, may specifically include:
  • a recording module 221 configured to: when the vehicle is covered by the antenna 23 of the identified lane number device 22 When traveling within the cover range, the record label 21 transmits information of the signal according to a preset frequency, and the information of the signal includes: the vehicle information identified by the label, the antenna information receiving the signal, and the identification of the lane number device 22 Time information of the signal, and information of received signal strength (RSSI) generated when the signal is received;
  • RSSI received signal strength
  • the determining module 222 is configured to receive each of the signals when the vehicle travels within the coverage of the antenna 23 of the identified lane number device 22 after the vehicle leaves the coverage of the antenna 23 of the identified lane number device 22 An accumulated value of the received signal strength generated by an antenna 23, and determining that the vehicle is traveling in a lane corresponding to the antenna 23 having the largest accumulated value of the received signal strength;
  • the reporting module 223 is configured to report lane number information of the lane and the vehicle information.
  • the plurality of antennas 23 according to the embodiments of the present invention may be disposed in the same identification lane number device 22 or different identification lane number devices 22 for realizing identification of signals and information transmission between the lane number device 22 and the tag 21.
  • the recording module 221 updates the time information of the signal received by the reader 22 in the recorded information to the time when the reader 22 receives the current signal to facilitate the vehicle to leave the reader 22.
  • the antenna 23 covers the determination of the range and records the information of the received signal strength generated when the current signal is received.
  • the accumulated value of the received signal strength is a result of adding all the received signal strengths generated by the antenna receiving the signal in the recorded information, that is, when the vehicle is traveling within the signal coverage range of the antenna 23,
  • the antenna 23 adds the total received signal strengths generated when the tag 21 provided by the vehicle transmits a signal to the reader at a frequency.
  • the time information of the received signal in the recording information of the recording time and the recording time of the recording module 221 may be the difference between the time when the last time the signal sent by the tag 21 is received is greater than or equal to a preset value, for example, 3 seconds. Then, the determining module 222 determines that the vehicle has moved away from the coverage of the antenna 23 of the reader 22, and then calculates an accumulated value of the received signal strength corresponding to the antenna 23 that receives the signal based on the recorded information, and based on The accumulated value is used to determine the lane number of the vehicle.
  • the reader 22 may further have a scan determining module for scanning the recorded information in real time and determining whether the difference between the time information of the received signal and the current time in the recorded information is greater than or equal to one. default value.
  • multiple readers 22 communicate through the user data packet protocol (UDP) transmission mode to transmit and receive.
  • UDP user data packet protocol
  • the accumulated value that the determining module 222 needs to determine may be the accumulated value of the received signal strength corresponding to the antenna 23 set by the reader 22 where the determining module 222 is located, each of the The reader 22 may be provided with 1 to 4 antennas 23; it may also be an accumulated value of the received signal strength corresponding to the antenna 23 provided by the reader 22 where the decision module 222 is located and the antenna set by the other reader 22.
  • the antenna 23 having the largest accumulated value of the received signal strength is not reported in order to avoid the occurrence of multiple reports that the same vehicle information is set up by the same reader 22 or different readers 22 with multiple antennas.
  • the reporting module 222 does not report the lane number information of the lane and the vehicle information, and the vehicle information includes electronic license plate information and the like.
  • the RFID system for identifying the lane number provided by the embodiment of the present invention, in order to avoid the same A vehicle information is reported by the same reader 22 or a plurality of readers 22 with multiple antennas, which results in the failure to correctly identify the lane number of the vehicle and the electronic license plate.
  • a receiver 23 is provided based on the antenna 23 The accumulated value of the received signal strength RSSI generated when the signal is transmitted is used to determine the lane in which the vehicle is located, and after the vehicle leaves the coverage of the antenna 23 of the reader 22, only the lane number corresponding to the antenna with the largest RSSI accumulation value is reported.
  • the embodiment of the present invention further provides a method for identifying a lane number. As shown in FIG. 4, the method may include:
  • Step 41 When the vehicle is traveling within the coverage of the antenna 23 of the reader 22, the reader 22 records information of the signal transmitted by the tag 21 at a preset frequency;
  • the information of the signal includes vehicle information identified by the tag 21, antenna information for receiving the signal, time information of the reader 22 receiving the signal, and received signal strength RSSI information generated when the signal is received. ;
  • Step 42 After the vehicle is driven away from the coverage of the antenna 23 of the reader 22, the reader 22 respectively acquires each antenna 23 that receives the signal when the vehicle travels within the coverage of the antenna 23 of the reader 22. Generating an accumulated value of the received signal strength, and determining that the vehicle is traveling in a lane corresponding to the antenna 23 having the largest accumulated value of the received signal strength;
  • Step 43 the reader 22 reports the lane number information of the lane and the vehicle information.
  • the lane number identification method provided by the embodiment of the present invention is described in detail below with reference to FIG.
  • the embodiment may specifically include:
  • Step 51 Configure a correspondence between the antenna 23 and the lane.
  • the reader 22 can previously configure the correspondence between the antenna 23 and the lane.
  • Step 52 Configure whether it is necessary to send RSSI accumulated value related information to the adjacent reader 22. In order to ensure the correct identification of the lane number, the reader 22 is opened by default under this requirement, ie this step is optional.
  • Step 53 Establish a record table for recording information of the received signal.
  • the reader 22 receives the signal transmitted by the tag 21 disposed in the vehicle at a predetermined frequency for the first time through the antenna 23 provided thereto.
  • the reader 22 creates a record table for recording information of the received signal.
  • the information of the signal includes: vehicle information identified by the tag 21, such as an electronic license plate, etc., information of the antenna 23 receiving the signal, time information of the reader 22 receiving the signal, and reception generated when the signal is received.
  • the signal strength (RSSI) information records the corresponding entry in the table in which the information of the above signal exists.
  • the reader 22 may establish a record table corresponding to each antenna 23 for each antenna 23, such as a hash table, and may be based on the tags 21
  • the unique identifier of the identified vehicle information or the like is used as a key value of the hash table to hash all the record tables.
  • the signal transmission operation mode between the tag 21 and the reader 22, the signal reception start termination mechanism, and the like can be the same as the prior art.
  • Step 54 Update the information in the record table.
  • the reader 22 receives the signal transmitted by the tag 21 at a predetermined frequency in real time, and updates the time information of the received signal in the recording table to receive the current signal. Time, and record information on the received signal strength of the signal currently received by the antenna. That is, the time information of the received signal in the record table may always be the time when the signal was last received, but the record table needs to record the RSSI value generated each time the antenna receives the signal, so that the accumulated value is obtained by subsequent calculation.
  • Step 55 judging whether the vehicle is driving away from the coverage of the antenna 23.
  • step 55 can be performed simultaneously with step 54.
  • step 56 is performed.
  • Step 56 Calculate the accumulated value of the received signal strength.
  • the reader 22 can calculate the accumulated value of the received signal strength corresponding to each antenna 23 based on the recorded information in the record table.
  • the step may further include: the reader 22 transmitting or receiving the received signal strength sent by the other readers 22 to the other readers 22 by using the UDP transmission mode.
  • the accumulated value, the antenna 23 information corresponding to the accumulated value, and the vehicle information corresponding to the accumulated value are the tag 21 information.
  • the information of the antenna 23 may specifically include: lane number information corresponding to the antenna 23, information of the reader 22 to which the antenna 23 belongs, and serial number information of the antenna 23 in the associated reader 22.
  • Step 57 Determine the lane number information of the vehicle.
  • the reader 22 hashes the accumulated value information obtained by itself and the accumulated value information sent by the adjacent reader 22 that is cyclically received, according to the unique identifier of the vehicle information as a hash table key value, and if the unique identifier is the same, Then, it is judged whether the lane numbers are the same, the second hash is performed according to the lane number, and in the accumulated value information of the same vehicle, that is, the accumulated value information of the same vehicle, it is determined that the vehicle travels in the lane corresponding to the antenna 23 having the largest accumulated value of the received signal strength.
  • the first reader when the vehicle has left a reader 22 in the system, such as the antenna 23 of the first reader, the first reader adds the vehicle-related accumulated value information, such as A cumulative value information is sent to other readers 22 of the system, such as a second reader.
  • the second reader may first determine the first accumulated value information sent by the first reader and the record information related to the vehicle stored by itself, ie a relationship between the current accumulated value information, wherein the current accumulated value information Set as the second accumulated value information, since the vehicle does not currently leave the coverage of the second reader antenna 23, the second accumulated value information is not when the vehicle is traveling within the coverage of the second reader antenna 23, The sum of the total received signal strengths produced by the reader when it receives the signal.
  • the second reader may notify the first reader that the lane number and the vehicle information of the vehicle are not required to be reported, and the first reader The record information related to the vehicle may be deleted. If the first accumulated value information is greater than the second accumulated value information, the second reader may enter a waiting state until the second reader receives the signal sent by the tag again, and then the first The accumulated value information is compared with the current accumulated value information of the vehicle, and based on the comparison result, the first reader is notified to delete the recorded information state or the waiting state.
  • a reader is determined to be the reader with the highest priority based on parameters such as the setting position of the reader, and the reader with the highest priority only receives the vehicle report information sent by other readers. It includes information such as accumulated values, without sending vehicle report information to other readers, and based on vehicle report information reported by other readers, determines and notifies one of the other lower priority readers to report the lane number of the vehicle and Vehicle information, while other lower priority readers do not report the vehicle's lane number and vehicle information.
  • Step 58 it is judged whether the antenna 23 having the largest accumulated value of the RSSI is the antenna 23 set by the reader 22 itself.
  • step 59 If yes, go to step 59; otherwise, delete all the information corresponding to the above vehicle including the accumulated value.
  • Step 59 Report the lane number information and the vehicle information.
  • the reader 22 reports the determined lane number information of the vehicle and the vehicle information to the central information system for data processing such as electronic license plate recognition.
  • the present invention provides a method, reader and system for identifying a lane number, by reading the recorder when the vehicle is traveling within the coverage of the reader antenna.
  • Decoding information of a signal transmitted by a preset frequency the information of the signal including vehicle information identified by the label, antenna information receiving the signal, time information of receiving the signal, and receiving the signal by an antenna RSSI information generated at the time; after the vehicle leaves the coverage of the reader antenna, the reader respectively acquires the received signal generated by each antenna receiving the signal when the vehicle travels within the coverage of the reader antenna And accumulating the intensity, and determining that the vehicle is traveling in a lane corresponding to the antenna having the largest accumulated value of the received signal strength; the reader reporting the lane number information of the lane and the vehicle information.
  • the correct identification of the electronic license plate is ensured by correctly identifying the lane number of the vehicle.

Abstract

L'invention concerne un procédé, un lecteur et un système d'identification de numéro de voie de circulation, le procédé comprenant les opérations suivantes : lorsqu'un véhicule se déplace dans la plage de couverture d'une antenne de lecteur, le lecteur enregistre les informations d'un signal transmis par une étiquette à une fréquence préréglée, les informations comprenant : les informations du véhicule étiqueté par l'étiquette, les informations de l'antenne recevant le signal, l'instant auquel le lecteur a reçu le signal, et l'intensité des signaux reçus générée durant le processus de réception de signal de l'antenne ; et lorsque le véhicule se déplace au-delà de la plage de couverture de l'antenne de lecteur, le lecteur acquiert respectivement les valeurs accumulées de l'intensité des signaux reçus générée par chaque antenne recevant le signal lorsque le véhicule se déplace dans la plage de couverture de l'antenne de lecteur, et détermine que le véhicule se déplaçait dans la voie correspondant à l'antenne avec la valeur accumulée maximale ; le lecteur rapporte les informations de numéro de voie de la voie et les informations de véhicule. La présente invention peut identifier correctement le numéro de la voie dans laquelle un véhicule se trouve, permettant ainsi de garantir une identification correcte d'une plaque d'immatriculation électronique.
PCT/CN2012/074009 2011-12-09 2012-04-13 Procédé, lecteur et système d'identification de numéro de voie de circulation WO2013082908A1 (fr)

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CN201110408386.6 2011-12-09
CN201110408386.6A CN103164717B (zh) 2011-12-09 2011-12-09 一种识别车道号的方法、装置及系统

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CN106355926A (zh) * 2015-07-17 2017-01-25 上海华虹集成电路有限责任公司 车辆横向定位的方法
CN108460304B (zh) * 2017-09-18 2021-07-23 江苏本能科技有限公司 车辆所处车道判别方法及系统、数据处理设备
CN109800829B (zh) * 2018-12-04 2022-02-18 北京千方科技股份有限公司 一种用于车辆识别的信号分时发送方法、装置及系统
CN109887310B (zh) * 2019-03-25 2021-11-05 深圳市华士精成科技有限公司 一种基于有源rfid的车辆逆行判定方法
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