WO2013082908A1 - Traffic lane number identification method, reader and system - Google Patents

Traffic lane number identification method, reader and system 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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WIPO (PCT)
Prior art keywords
information
reader
antenna
vehicle
signal
Prior art date
Application number
PCT/CN2012/074009
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French (fr)
Chinese (zh)
Inventor
陈杰
徐运
刘珊
Original Assignee
中兴通讯股份有限公司
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Publication of WO2013082908A1 publication Critical patent/WO2013082908A1/en

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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

Provided are a traffic lane number identification method, reader and system, the method comprising: when a vehicle travels within the coverage range of a reader antenna, the reader records the information of a signal transmitted by a tag at a preset frequency, the information comprising: the information of the vehicle labeled by the tag, the information of the antenna receiving the signal, the time the reader received the signal, and the strength of the received signals generated during the signal receiving process of the antenna; and when the vehicle travels beyond the reader antenna coverage range, the reader respectively acquires the accumulated values of the strength of the received signals generated by each antenna receiving the signal when the vehicle travels within the reader antenna coverage range, and determines that the vehicle was travelling in the lane corresponding to the antenna with the maximum accumulated value; the reader reports the lane number information of the lane and the vehicle information. The present invention can correctly identify the number of the lane a vehicle is in, thus ensuring correct identification of an electronic license plate.

Description

一种识别车道号的方法、 阅读器及系统 技术领域  Method, reader and system for identifying lane number
本发明涉及无线射频识别应用技术领域， 具体涉及一种识别车道号的 方法、 阅读器及系统。 背景技术  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
无线射频识别（RFID, Radio Frequency Identification )技术是一种非接 触式的自动识别技术， 俗称电子标签， RFID技术通过射频信号自动识别目 标对象并获取相关数据， 识别工作无需人工干预， 可工作于各种恶劣环境。  Radio Frequency Identification (RFID) 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 系统通常可由阅读器、 天线和标签组成。 其中， 标签（Tag ) 由 耦合元件及芯片组成， 每个标签具有唯一的电子编码， 附着在物体上用于 标识目标对象； 阅读器（Reader )为读取标签信息的设备， 可设计为手持式 或固定式； 天线（Antenna) )用于在标签和阅读器间传递射频信号。  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.
RFID技术的基本工作原理并不复杂， 当标签进入磁场后， 接收阅读器 发出的射频信号， 凭借感应电流所获得的能量发送出存储在标签芯片中的 产品信息， 所述标签为无源标签或被动标签（Passive Tag ); 或者由标签主 动发送某一频率的信号， 所述标签为有源标签或主动标签（Active Tag ), 阅 读器读取信息并解码后， 送至中央信息系统进行有关数据处理。  The basic working principle of RFID technology is not complicated. 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.
由于 RFID技术可识别高速运动物体并可同时识别多个标签，具有操作 快捷方便等优点， 因此， RFID技术被广泛应用于在城市智能交通中， 例如 电子车牌识别等。  Because 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.
但在电子车牌识别的实际应用中， 要求车辆上报要与车道号保持一致， 而由于 RFID技术中所包括的天线的覆盖场区即范围是一个椭圆形， 其中， 因应用需求的不同， 天线所覆盖的区域也会有所变化， 如图 1 所示， 使得 一个车道所对应的天线可以识别到相邻或者更远的车道上车辆， 进而同时 上报多个不在同一车道上的车辆信息。 因此，现有的 RFID技术不能正确识 别车道号， 从而影响了电子车牌的正确识别。 发明内容 However, in the practical application of the 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
本发明为了解决现有技术中由于无法正确识别车辆所在车道号， 从而 导致无法实现电子车牌的正确识别这一技术问题， 提供了一种识别车道号 的方法、 阅读器及系统， 从而通过正确识别车辆所在车道号， 确保电子车 牌的正确识别。  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.
为解决上述技术问题， 本发明提供方案如下：  In order to solve the above technical problems, the present invention provides the following solutions:
本发明实施例提供了一种识别车道号的方法，所述方法应用于 RFID系 统中； 所述无线射频识别系统包括： 设置于一车辆中的标签、 阅读器以及 多根天线； 所述多根天线设置于同一阅读器或不同阅读器中； 所述方法包 括：  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:
当所述车辆在阅读器天线覆盖范围内行驶时， 阅读器记录所述标签按 一预设频率发送的信号的信息， 所述信号的信息包括所述标签所标识的车 辆信息、 接收所述信号的天线信息、 阅读器接收所述信号的时间信息以及 天线接收所述信号时产生的 RSSI的信息；  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;
当所述车辆驶离阅读器天线覆盖范围后， 阅读器分别获取所述车辆在 阅读器天线覆盖范围内行驶时， 接收所述信号的每一根天线所产生的接收 信号强度的累加值， 并判定所述车辆在接收信号强度的累加值最大的天线 所对应的车道内行驶；  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;
阅读器上报所述车道的车道号信息以及所述车辆信息。  The reader reports the lane number information of the lane and the vehicle information.
优选的， 所述阅读器记录所述标签按一预设频率发送的信号的信息， 为：  Preferably, the reader records information about a signal sent by the label at a preset frequency, which is:
为接收到所述信号的天线建立记录信息， 以用于记录所述信号的信息； 所述建立记录信息， 为： 建立哈希 Hash表。 Establishing recording information for an antenna that receives the signal for recording information of the signal; The establishing record information is: establishing a hash hash table.
优选的， 所述阅读器记录所述标签按一预设频率发送的信号的信息时， 若记录信息中， 已经存在所述车辆对应的信号的信息， 则将所述记录 信息中阅读器接收信号的时间信息更新为接收当前信号的时间， 并记录接 收当前信号时产生的接收信号强度的信息；  Preferably, 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;
所述接收信号强度的累加值为：  The accumulated value of the received signal strength is:
将所记录信息中所记录的接收信号的天线所产生的全部接收信号强度 相加后的结果。  The result of adding all the received signal intensities generated by the antenna of the received signal recorded in the recorded information.
优选的， 若当前时间与记录信息中阅读器接收信号的时间之间的差值 大于等于一预设值， 则阅读器判定所述车辆驶离阅读器天线覆盖范围。  Preferably, if the difference between the current time and the time when the reader receives the signal in the recorded information is greater than or equal to a predetermined value, the reader determines that the vehicle is away from the reader antenna coverage.
优选的， 若所述多根天线设置于不同阅读器中， 则不同阅读器间通过 用户数据包协议 UDP的传输方式传输的各自的接收信号强度的累加值， 以 及接收信号强度的累加值所对应的天线信息和车辆信息， 所述天线信息包 括天线对应的车道号信息、 天线所属阅读器信息以及天线在所属阅读器的 序号信息；  Preferably, if the plurality of antennas are disposed in different readers, the accumulated values of the respective received signal strengths transmitted by different readers through the transmission method of the user data packet protocol UDP, and the accumulated values of the received signal strengths are corresponding. Antenna information and vehicle information, 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;
所述当所述车辆驶离阅读器天线覆盖范围后， 阅读器分别获取每一根 天线所产生的接收信号强度的累加值， 并判定所述车辆在接收信号强度的 累加值最大的天线所对应的车道内行驶， 为：  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:
阅读器获取自身设置的天线所产生的接收信号强度的累加值， 或者阅 读器获取自身设置的天线所产生的接收信号强度的累加值和其他阅读器所 设置的天线所产生的接收信号强度的累加值， 并判断所述车辆在接收信号 强度的累加值最大的天线所对应的车道内行驶。  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.
优选的， 若接收信号强度的最大累加值对应的天线不是阅读器自身设 置的天线， 则阅读器不上报所述车道的车道号信息以及所述车辆信息。  Preferably, if the antenna corresponding to the maximum accumulated value of the received signal strength is not the antenna set by the reader itself, the reader does not report the lane number information of the lane and the vehicle information.
本发明实施例还提供了一种识别车道号的阅读器， 所述阅读器设置于 一无线射频识别 RFID系统中；所述无线射频识别系统包括设置于一车辆中 的标签、 阅读器以及多根天线； 所述多根天线设置于同一阅读器或不同阅 读器中； 所述阅读器包括： An embodiment of the present invention further provides a reader for identifying a lane number, where the reader is disposed on In 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:
记录模块， 用于当所述车辆在所述阅读器的天线覆盖范围内行驶时， 记录所述标签按一预设频率发送的信号的信息， 其中， 所述信号的信息包 括所述标签所标识的车辆信息、 接收所述信号的天线信息、 所述阅读器接 收所述信号的时间信息以及天线接收所述信号时产生的接收信号强度 RSSI 信息；  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;
判定模块， 用于当所述车辆驶离所述阅读器天线覆盖范围后， 分别获 取所述车辆在所述阅读器天线覆盖范围内行驶时， 接收所述信号的每一根 天线所产生的接收信号强度的累加值， 并判定所述车辆在接收信号强度的 累加值最大的天线所对应的车道内行驶；  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;
上报模块， 用于上报所述车道的车道号信息以及所述车辆信息。  The reporting module is configured to report lane number information of the lane and the vehicle information.
优选的， 当所述阅读器接收到所述标签发送的一信号时， 所述记录模 块， 还用于确定所记录信息中已经存在所述车辆对应的信号的信息时， 将 所述接收信号的时间信息更新为接收当前信号的时间， 并记录接收当前信 号时产生的接收信号强度的信息；  Preferably, when the reader receives a signal sent by the tag, 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;
所述接收信号强度的累加值为：  The accumulated value of the received signal strength is:
将一天线所对应的记录信息中所记录的全部接收信号强度相加后获 取。  The received signal strengths recorded in the record information corresponding to one antenna are added and obtained.
优选的， 所述判定模块， 用于确定当前时间与所述记录模块所记录的 记录信息中阅读器接收信号的时间之间的差值大于等于一预设值时， 判定 所述车辆驶离阅读器天线覆盖范围。  Preferably, 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.
优选的， 若所述无线射频识别 RFID系统存在多个阅读器， 则多个阅读 器间通过用户数据包协议 UDP的传输方式传输各自的接收信号强度的累加 值， 以及接收信号强度的累加值所对应的天线信息和车辆信息， 所述天线 信息包括天线对应的车道号信息、 天线所属阅读器信息以及天线在所属阅 读器的序号信息； Preferably, if the radio frequency identification (RFID) RFID system has multiple readers, 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;
所述判定模块， 用于获取所属阅读器设置的天线所产生的接收信号强 度的累加值， 或者获取所属阅读器设置的天线所产生的接收信号强度的累 加值和其他阅读器所设置的天线所产生的接收信号强度的累加值， 并判断 所述车辆在接收信号强度的累加值最大的天线所对应的车道内行驶。  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.
优选的， 若接收信号强度的最大累加值对应的天线， 不是所述上报模 块所属阅读器设置的天线， 则所述上报模块不上报所述车道的车道号信息 以及所述车辆信息。  Preferably, if the antenna corresponding to the maximum accumulated value of the received signal strength is not the antenna set by the reader to which the reporting module belongs, the reporting module does not report the lane number information of the lane and the vehicle information.
本发明实施例还提供了一种识别车道号的系统， 所述系统采用无线射 频识别 RFID技术； 所述系统包括设置于一车辆中的标签、 阅读器以及多根 天线； 所述多根天线设置于同一阅读器或不同阅读器中；  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;
所述阅读器， 用于当所述车辆在自身的天线覆盖范围内行驶时， 记录 所述标签按一预设频率发送的信号的信息， 所述信号的信息包括所述标签 所标识的车辆信息、 接收所述信号的天线信息、 所述阅读器接收所述信号 的时间信息以及天线接收所述信号时产生的接收信号强度 RSSI信息； 所述阅读器， 还用于当所述车辆驶离自身的天线覆盖范围后， 获取所 述车辆在自身的天线覆盖范围内行驶时， 接收所述信号的每根天线所产生 的接收信号强度的累加值， 并判定所述车辆在接收信号强度的累加值最大 的天线所对应的车道内行驶； 还用于上报所述车道的车道号信息以及所述 车辆信息。  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.
从以上所述可以看出， 本发明提供的一种识别车道号的方法、 阅读器 及系统， 通过当所述车辆在阅读器天线覆盖范围内行驶时， 阅读器记录所 述标签按一预设频率发送的信号的信息， 所述信号的信息包括所述标签所 标识的车辆信息、 接收所述信号的天线信息、 接收所述信号的时间信息以 及天线在接收所述信号时产生的接收信号强度（RSSI ) 的信息； 当所述车 辆驶离阅读器天线覆盖范围后， 阅读器分别获取所述车辆在阅读器天线覆 盖范围内行驶时， 接收所述信号的每一根天线所产生的接收信号强度的累 加值， 并判定所述车辆在接收信号强度的累加值最大的天线所对应的车道 内行驶； 阅读器上报所述车道的车道号信息以及所述车辆信息。 本发明可 正确识别车辆所在车道号， 从而确保电子车牌的正确识别。 附图说明 As can be seen from the above, the present invention provides a method, a reader and a system for recognizing a lane number. When the vehicle is traveling within the coverage of the reader antenna, 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. DRAWINGS
图 1为现有车道号识别技术示意图；  Figure 1 is a schematic diagram of an existing lane number identification technology;
图 2为本发明实施例提供的识别车道号系统结构示意图；  2 is a schematic structural diagram of a system for identifying a lane number according to an embodiment of the present invention;
图 3为本发明实施例提供的阅读器的结构示意图；  3 is a schematic structural diagram of a reader according to an embodiment of the present invention;
图 4为本发明实施例提供的识别车道号方法具体实现流程示意图一； 图 5为本发明实施例提供的识别车道号方法具体实现流程示意图二。 具体实施方式  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. detailed description
本发明实施例提供了一种识别车道号的系统， 该系统具体可为一种无 线射频识别 RFID系统。  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.
如附图 2所示， 该系统具体可以包括设置于一车辆中的标签 21、 识别 车道号装置 22以及多根天线 23。 该系统可基于低级别阅读协议 ( LLRP ) 实现各组成器件之间的接口规范以及信息调度。  As shown in Fig. 2, 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).
本发明实施例涉及的标签 21 , 具体可用于按一预设频率向识别车道号 装置 22发送一信号。 标签 21具体可为一被动标签或主动标签。  The tag 21 according to the embodiment of the present invention 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.
本发明实施例所涉及的识别车道号装置 22, 其实质可为一阅读器， 如 附图 3所示， 具体可以包括：  The identification of the lane number device 22, which may be a reader, as shown in FIG. 3, may specifically include:
记录模块 221 ,用于当所述车辆在所述识别车道号装置 22的天线 23覆 盖范围内行驶时， 记录标签 21按一预设频率所发送信号的信息， 所述信号 的信息包括： 所述标签所标识的车辆信息、 接收所述信号的天线信息、 识 别车道号装置 22接收所述信号的时间信息， 以及接收所述信号时产生的接 收信号强度（RSSI ) 的信息； 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;
判定模块 222,用于当所述车辆驶离识别车道号装置 22的天线 23覆盖 范围后， 分别获取所述车辆在识别车道号装置 22的天线 23覆盖范围内行 驶时， 接收所述信号的每一根天线 23所产生的接收信号强度的累加值， 并 判定所述车辆在接收信号强度的累加值最大的天线 23 所对应的车道内行 驶；  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;
上报模块 223, 用于上报所述车道的车道号信息以及所述车辆信息。 本发明实施例所涉及的多根天线 23, 可设置于同一识别车道号装置 22 或不同识别车道号装置 22中， 用于实现识别车道号装置 22与标签 21之间 的信号及信息传输。  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.
在本发明一个可选实施例中， 当识别车道号装置 22, 即阅读器 22接收 到标签 21发送的信号时， 若记录模块 221所保存的记录信息中， 已经存在 所述车辆对应的信号信息， 例如已经存在以该车辆信息为唯一标识的 Hash 表， 则记录模块 221将记录信息中阅读器 22接收信号的时间信息更新为阅 读器 22接收当前信号的时间以便于车辆驶离阅读器 22的天线 23覆盖范围 的判断， 并记录接收当前信号时产生的接收信号强度的信息。 本发明后续 为了表述清楚， 统一将识别车道号装置 22称为阅读器 22。  In an optional embodiment of the present invention, when the lane number device 22 is identified, that is, when the reader 22 receives the signal sent by the tag 21, if the record information held by the recording module 221 already exists, the signal information corresponding to the vehicle already exists. For example, if there is already a hash table uniquely identified by the vehicle information, 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 present invention is hereinafter described for clarity, and the identification of the lane number device 22 is referred to as the reader 22.
上述的接收信号强度的累加值， 为将所述记录信息中接收所述信号的 天线所产生的全部接收信号强度相加后的结果， 即： 车辆在一天线 23信号 覆盖范围内行驶时， 将该天线 23在接收该车辆所设置的标签 21按一频率 向阅读器所发送信号时所产生的全部接收信号强度相加后的结果。  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.
在本发明一个可选实施例中， 若当前时间， 具体可为阅读器 22系统当 前时间或一标准时间与记录模块 221 的记录信息中接收信号的时间信息， 具体可为最后一次接收到标签 21所发送的信号的时间之间的差值大于等于 一预设值， 例如 3秒等， 则判定模块 222判定该车辆已经驶离阅读器 22的 天线 23的覆盖范围， 则此时可以基于记录信息， 计算接收到该信号的天线 23所对应的接收信号强度的累加值， 并基于该累加值， 进行车辆所在车道 号的判定。 In an optional embodiment of the present invention, if the current time, specifically, the reader 22 system 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.
基于上述描述可以看， 本发明实施例， 阅读器 22中还可以存在一扫描 判断模块， 以用于实时扫描记录信息并判断记录信息中接收信号的时间信 息与当前时间的差值是否大于等于一预设值。  Based on the above description, it can be seen that, in the embodiment of the present invention, 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.
在本发明一个可选实施例中， 若本发明实施例提供的系统内存在多个 阅读器 22, 则多个阅读器 22间通过用户数据包协议（UDP )的传输方式进 行通讯， 以传输接收信号强度的累加值， 以及接收信号强度的累加值所对 应的天线信息和车辆信息， 所述天线信息包括该天线对应的车道号信息、 该天线所属阅读器信息以及该天线在所属阅读器的序号信息。  In an optional embodiment of the present invention, if there are multiple readers 22 in the system provided by the embodiment of the present invention, multiple readers 22 communicate through the user data packet protocol (UDP) transmission mode to transmit and receive. The accumulated value of the signal strength, and the antenna information and the vehicle information corresponding to the accumulated value of the received signal strength, the antenna information including the lane number information corresponding to the antenna, the reader information of the antenna, and the sequence number of the antenna in the reader information.
若本发明实施例中存在多个阅读器 22, 则判定模块 222需要判断的累 加值可以是判定模块 222所在阅读器 22所设置的天线 23所对应的接收信 号强度的累加值， 所述每一个阅读器 22可以设置 1至 4根天线 23; 也可以 是判定模块 222所在阅读器 22所设置的天线 23和其他阅读器 22所设置的 天线所对应的接收信号强度的累加值。  If there are multiple readers 22 in the embodiment of the present invention, 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.
为了避免出现同一车辆信息被设置多根天线的同一阅读器 22、 或不同 阅读器 22多次上报， 在本发明一个可选实施例中， 若接收信号强度的累加 值最大的天线 23, 不是上报模块 222所在阅读器 22所设置的天线 23, 则 上报模块 222不上报所述车道的车道号信息以及所述车辆信息， 所述车辆 信息包括电子车牌信息等。  In an alternative embodiment of the present invention, 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. When the module 222 is located in the antenna 23 provided by the reader 22, 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.
本发明实施例提供的识别车道号的系统即 RFID系统，为了避免出现同 一车辆信息被设置多根天线的同一阅读器 22、 或不同阅读器 22多次上报， 从而导致无法正确识别车辆所在车道号以及电子车牌的情况， 提出了一种 基于天线 23在接收标签 21所发送的信号时所产生的接收信号强度 RSSI的 累加值， 来判定车辆所在车道， 并在车辆驶离阅读器 22的天线 23覆盖范 围后， 只上报 RSSI累加值最大的天线所对应的车道号的技术解决方案。 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. Technical solutions.
可见， 基于本发明实施例提供的识别车道号系统， 本发明实施例还提 供了一种识别车道号的方法， 如附图 4所示， 该方法可以包括：  It can be seen that, based on the identification of the lane number system provided by the embodiment of the present invention, the embodiment of the present invention further provides a method for identifying a lane number. As shown in FIG. 4, the method may include:
步驟 41 , 当车辆在阅读器 22的天线 23覆盖范围内行驶时， 阅读器 22 记录标签 21按一预设频率发送的信号的信息；  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;
其中， 所述信号的信息包括所述标签 21所标识的车辆信息、 接收所述 信号的天线信息、 阅读器 22接收所述信号的时间信息， 以及接收所述信号 时产生的接收信号强度 RSSI信息；  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. ;
步驟 42, 当所述车辆驶离阅读器 22的天线 23覆盖范围后， 阅读器 22 分别获取所述车辆在阅读器 22的天线 23覆盖范围内行驶时， 接收所述信 号的每一根天线 23所产生的接收信号强度的累加值， 并判定所述车辆在接 收信号强度的累加值最大的天线 23所对应的车道内行驶；  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;
步驟 43, 阅读器 22上报所述车道的车道号信息以及所述车辆信息。 为了便于对本发明实施例提供的技术方案的理解， 下面结合附图 5,对 本发明实施例提供的车道号识别方法的一个具体实施例进行详细描述。 该 实施例具体可以包括：  Step 43, the reader 22 reports the lane number information of the lane and the vehicle information. In order to facilitate the understanding of the technical solutions provided by the embodiments of the present invention, a specific embodiment of 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:
步驟 51 , 配置天线 23与车道之间的对应关系。  Step 51: Configure a correspondence between the antenna 23 and the lane.
这里， 阅读器 22可事先配置天线 23与车道之间的对应关系。  Here, the reader 22 can previously configure the correspondence between the antenna 23 and the lane.
步驟 52, 配置是否需要向相邻阅读器 22发送 RSSI累加值相关信息。 为了确保车道号的正确识别， 阅读器 22默认在此需求下打开， 即此步 驟为可选项。 步驟 53, 建立记录表以用于记录接收的信号的信息。 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.
若车辆是刚驶入阅读器 22的天线 23信号覆盖范围内， 即阅读器 22通 过其所设置的天线 23 ,首次接收到设置于车辆中的标签 21按一预设频率所 发送的信号时， 阅读器 22建立记录表以用于记录接收的信号的信息。  If the vehicle is just entering the signal coverage range of the antenna 23 of the reader 22, that is, 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.
所述信号的信息包括：所述标签 21所标识的车辆信息，如电子车牌等、 接收所述信号的天线 23信息、 阅读器 22接收所述信号的时间信息以及接 收所述信号时产生的接收信号强度（RSSI )信息， 则记录表中相应的存在 上述信号的信息的记录项。  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.
若阅读器 22所设置的多根天线 23均接收到标签 21所发送的信号， 则 阅读器 22可以为各个天线 23分别建立各天线 23所对应的记录表， 例如 Hash表， 并可以基于标签 21所标识的车辆信息等唯一标识作为 Hash表的 Key值来散列所有的记录表。  If the plurality of antennas 23 provided by the reader 22 receive the signals transmitted by the tags 21, 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.
本发明实施例中， 标签 21与阅读器 22之间的信号传输工作模式、 信 号接收启动结束机制等均可与现有技术相同。  In the embodiment of the present invention, 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.
步驟 54, 更新记录表中信息。  Step 54 Update the information in the record table.
若车辆继续在阅读器 22的天线 23信号覆盖范围内行驶， 则阅读器 22 实时接收标签 21按一预设频率所发送的信号， 并将记录表中接收信号的时 间信息更新为接收当前信号的时间， 并记录天线当前所接收信号的接收信 号强度的信息。 即记录表中接收信号的时间信息可总为最后一次接收到信 号的时间， 但记录表中需要记录天线每一次接收到信号时产生的 RSSI值， 以便后续计算获取累加值。  If the vehicle continues to travel within the signal coverage of the antenna 23 of the reader 22, 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.
步驟 55, 判断车辆是否驶离天线 23覆盖范围。  Step 55, judging whether the vehicle is driving away from the coverage of the antenna 23.
若阅读器 22系统当前时间或一标准时间， 与记录表中接收信号的时间 信息之间的差值大于等于一预设值， 例如 3秒， 则阅读器 22判定所述车辆 驶离阅读器 22的天线 23覆盖范围。 由于阅读器 22是实时扫描记录表中信号接收时间记录项的， 因此， 步 驟 55可与步驟 54同时进行。 If the difference between the current time or a standard time of the reader 22 system and the time information of the received signal in the record table is greater than or equal to a predetermined value, for example, 3 seconds, the reader 22 determines that the vehicle is driving away from the reader 22 The antenna 23 covers the area. Since the reader 22 scans the signal reception time entry in the recording table in real time, step 55 can be performed simultaneously with step 54.
当阅读器 22系统当前时间或一标准时间， 与记录表中接收信号的时间 信息之间的差值大于等于一预设值时， 执行步驟 56。  When the difference between the current time or a standard time of the reader 22 system and the time information of the received signal in the record table is greater than or equal to a predetermined value, step 56 is performed.
步驟 56, 计算接收信号强度的累加值。  Step 56: Calculate the accumulated value of the received signal strength.
当车辆驶离阅读器 22的天线 23覆盖范围后， 阅读器 22可基于记录表 中的记录信息， 计算每一根天线 23所对应的接收信号强度的累加值。  When the vehicle leaves the coverage of the antenna 23 of the reader 22, 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.
若阅读器 22需要与其他阅读器 22进行累加值信息交互， 则此步驟中 还可以包括： 阅读器 22采用 UDP传输方式向其他阅读器 22发送或接收其 他阅读器 22所发送的接收信号强度的累加值、 该累加值所对应的天线 23 信息以及该累加值对应的车辆信息即为标签 21 信息。 其中， 所述天线 23 信息具体可以包括： 该天线 23对应的车道号信息、 该天线 23所属阅读器 22信息以及该天线 23在所属阅读器 22的序号信息等。  If the reader 22 needs to perform the accumulated value information interaction with the other readers 22, 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.
步驟 57, 判定车辆所在车道号信息。  Step 57: Determine the lane number information of the vehicle.
具体的， 阅读器 22将自身获得的累加值信息， 以及循环接收的相邻阅 读器 22发送过来的累加值信息， 按照车辆信息的唯一标识作为 hash表 key 值来散列， 如果唯一标识相同， 则判断是否车道号相同， 按照车道号进行 二次散列， 并在唯一标识相同， 即同一车辆的累加值信息中， 判定车辆在 接收信号强度累加值最大的天线 23所对应的车道内行驶。  Specifically, 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.
在本发明一具体实施例中， 当车辆已经驶离系统内的一阅读器 22, 如 第一阅读器的天线 23覆盖范围时， 则第一阅读器将该车辆相关的累加值信 息， 如第一累加值信息发送给系统的其他阅读器 22, 如第二阅读器。 但是 此时， 该车辆仍然在第二阅读器天线 23覆盖范围内行驶， 则第二阅读器可 以先判断第一阅读器发送的第一累加值信息与自身存储的该车辆相关的记 录信息， 即当前累加值信息之间的大小关系， 其中， 所述当前累加值信息 设为第二累加值信息， 由于当前该车辆并未驶离第二阅读器天线 23覆盖范 围， 因此， 第二累加值信息并不是该车辆在第二阅读器天线 23覆盖范围内 行驶时， 第二阅读器在接收信号时所产生的全部接收信号强度之和。 上述 累加值信息的比较过程中， 如果第一累加值信息小于等于第二累加值信息， 则第二阅读器可以通知第一阅读器无需上报该车辆所在车道号和车辆信 息， 且第一阅读器可以删除该车辆相关的记录信息， 如果第一累加值信息 大于第二累加值信息， 则第二阅读器可以进入等待状态， 直到第二阅读器 再次接收到标签发送的信号时， 再次将第一累加值信息与该车辆当前累加 值信息相比较， 并基于比较结果进入通知第一阅读器删除记录信息状态还 是等待状态。 In a specific embodiment of the present invention, 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. However, at this time, the vehicle still travels within the coverage of the second reader antenna 23, and 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. During the comparison of the accumulated value information, if the first accumulated value information is less than or equal to the second accumulated value information, 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.
在本发明一可选实施例中， 可基于阅读器的设置位置等参数， 确定一 阅读器为优先级最高的阅读器， 该优先级最高的阅读器只接收其他阅读器 发送的车辆报告信息， 其中包含累加值等信息， 而无需向其他阅读器发送 车辆报告信息， 并基于其他阅读器上报的车辆报告信息， 判定并通知其他 优先级较低的阅读器中某一个上报该车辆的车道号和车辆信息， 而其他优 先级较低的阅读器不上报该车辆的车道号和车辆信息。  In an optional embodiment of the present invention, 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.
步驟 58,判断 RSSI的累加值最大的天线 23是否为阅读器 22本身所设 置的天线 23。  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.
如果是， 则执行步驟 59; 否则， 删除上述包括累加值在内的车辆所对 应的全部信息。  If yes, go to step 59; otherwise, delete all the information corresponding to the above vehicle including the accumulated value.
步驟 59, 上报车道号信息以及车辆信息。  Step 59: Report the lane number information and the vehicle information.
阅读器 22将判定的车辆所在车道号信息以及该车辆信息上报至中央信 息系统进行电子车牌识别等有关数据处理。  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.
从以上所述可以看出， 本发明提供的一种识别车道号的方法、 阅读器 及系统， 通过当所述车辆在阅读器天线覆盖范围内行驶时， 阅读器记录所 述标签按一预设频率所发送信号的信息， 所述信号的信息包括所述标签所 标识的车辆信息、 接收所述信号的天线信息、 接收所述信号的时间信息以 及天线在接收所述信号时产生的 RSSI信息； 当所述车辆驶离阅读器天线覆 盖范围后， 阅读器分别获取所述车辆在阅读器天线覆盖范围内行驶时， 接 收所述信号的每一根天线所产生的接收信号强度的累加值， 并判定所述车 辆在接收信号强度的累加值最大的天线所对应的车道内行驶； 阅读器上报 所述车道的车道号信息以及所述车辆信息。 从而通过正确识别车辆所在车 道号， 确保电子车牌的正确识别。 As can be seen from the above, 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. Thereby, the correct identification of the electronic license plate is ensured by correctly identifying the lane number of the vehicle.
以上所述仅是本发明的实施方式， 应当指出， 对于本技术领域的普通 技术人员来说， 在不脱离本发明原理的前提下， 还可以做出若干改进和润 饰， 这些改进和润饰也应视为本发明的保护范围。  The above description is only an embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is considered as the scope of protection of the present invention.

Claims

权利要求书 Claim
1、 一种识别车道号的方法， 所述方法应用于无线射频识别 RFID系统 中； 所述 RFID系统包括： 设置于车辆中的标签、 阅读器以及多根天线； 所 述多根天线设置于同一阅读器或不同阅读器中； 其特征在于， 所述方法包 括：  A method for identifying a lane number, the method being applied to a radio frequency identification (RFID) system; the RFID system comprising: a tag, a reader, and a plurality of antennas disposed in a vehicle; the plurality of antennas being disposed in the same a reader or a different reader; wherein the method comprises:
当所述车辆在阅读器天线覆盖范围内行驶时， 阅读器记录所述标签按 预设频率所发送信号的信息；  When the vehicle is traveling within the coverage of the reader antenna, the reader records information of the signal transmitted by the tag at a preset frequency;
其中， 所述信息包括： 所述标签所标识的车辆信息、 接收所述信号的 天线信息、 阅读器接收所述信号的时间信息以及天线接收所述信号时产生 的接收信号强度 RSSI的信息；  The information includes: vehicle information identified by the tag, antenna information for receiving the signal, time information of the reader receiving the signal, and information of a received signal strength RSSI generated when the antenna receives the signal;
当所述车辆驶离阅读器天线覆盖范围后， 阅读器分别获取所述车辆在 阅读器天线覆盖范围内行驶时，接收所述信号的每根天线所产生的 RSSI的 累加值，并判定所述车辆在 RSSI的累加值最大的天线所对应的车道内行驶； 阅读器上报所述车道的车道号信息以及所述车辆信息。  After the vehicle leaves the coverage of the reader antenna, the reader respectively acquires the accumulated value of the RSSI generated by each antenna receiving the signal when the vehicle is traveling within the coverage of the reader antenna, and determines the The vehicle travels in a lane corresponding to the antenna with the largest accumulated RSSI value; the reader reports the lane number information of the lane and the vehicle information.
2、 如权利要求 1所述方法， 其特征在于， 所述阅读器记录所述标签按 预设频率所发送信号的信息， 为：  2. The method according to claim 1, wherein the reader records information of the signal transmitted by the tag at a preset frequency, which is:
为收到所述信号的天线建立记录信息， 以用于记录所述信号的信息； 其中， 所述建立记录信息， 为： 建立哈希 Hash表。  And establishing record information for the antenna that receives the signal for recording the information of the signal; wherein the establishing the record information is: establishing a hash Hash table.
3、 如权利要求 2所述的方法， 其特征在于， 所述阅读器记录所述标签 按预设频率所发送信号的信息时，  3. The method according to claim 2, wherein when the reader records information of a signal transmitted by the tag at a preset frequency,
若记录信息中已经存在所述车辆对应信号的信息， 则将所述记录信息 中阅读器接收信号的时间信息更新为接收当前信号的时间， 并记录接收当 前信号时产生的 RSSI的信息；  If the information of the vehicle corresponding signal already exists in the record information, the time information of the received signal of the reader in the record information is updated to the time of receiving the current signal, and the information of the RSSI generated when the current signal is received is recorded;
所述 RSSI的累加值为：  The accumulated value of the RSSI is:
将所记录信息中所记录的接收信号的天线所产生的全部 RSSI相加后的 结果。 Adding all the RSSIs generated by the antennas of the received signals recorded in the recorded information The result.
4、 如权利要求 3所述的方法， 其特征在于， 若当前时间与记录信息中 阅读器接收信号的时间之间的差值大于等于预设值， 则阅读器判定所述车 辆已驶离阅读器天线覆盖范围。  4. The method according to claim 3, wherein if the difference between the current time and the time at which the reader receives the signal in the recorded information is greater than or equal to a preset value, the reader determines that the vehicle has left the reading Antenna coverage.
5、 如权利要求 1所述的方法， 其特征在于， 若所述多根天线设置于不 同阅读器中， 则不同阅读器间通过用户数据包协议 UDP的传输方式传输各 自的 RSSI的累加值， 以及 RSSI的累加值所对应的天线信息和车辆信息； 其中， 所述天线信息包括： 天线对应的车道号信息、 天线所属阅读器 信息以及天线在所属阅读器的序号信息；  5. The method according to claim 1, wherein if the plurality of antennas are disposed in different readers, the accumulated values of the respective RSSIs are transmitted between different readers by using a user data packet protocol UDP. And the antenna information and the vehicle information corresponding to the accumulated value of the RSSI; wherein the antenna information includes: a lane number information corresponding to the antenna, a reader information to which the antenna belongs, and serial number information of the antenna in the associated reader;
所述阅读器分别获取每根天线所产生的 RSSI的累加值，并判定车辆在 累加值最大的天线所对应的车道内行驶， 为：  The reader separately obtains the accumulated value of the RSSI generated by each antenna, and determines that the vehicle is traveling in the lane corresponding to the antenna with the largest accumulated value, which is:
阅读器获取自身设置的天线所产生的 RSSI的累加值； 或者阅读器获取 自身设置的天线所产生的 RSSI的累加值和其他阅读器所设置的天线所产生 的 RSSI的累加值， 并判定所述车辆在 RSSI的累加值最大的天线所对应的 车道内行驶。  The reader obtains the accumulated value of the RSSI generated by the antenna set by itself; or the reader obtains the accumulated value of the RSSI generated by the antenna set by itself and the accumulated value of the RSSI generated by the antenna set by other readers, and determines the said The vehicle travels in the lane corresponding to the antenna with the largest accumulated RSSI value.
6、 如权利要求 5所述的方法， 其特征在于， 若 RSSI的最大累加值对 应的天线不是阅读器自身设置的天线， 则阅读器不上报所述车道的车道号 信息以及所述车辆信息。  6. The method according to claim 5, wherein if the antenna corresponding to the maximum accumulated value of the RSSI is not the antenna set by the reader itself, the reader does not report the lane number information of the lane and the vehicle information.
7、 一种识别车道号的阅读器， 所述阅读器设置于 RFID系统中； 其特 征在于， 所述阅读器包括：  7. A reader for identifying a lane number, the reader being disposed in an RFID system; wherein the reader comprises:
记录模块， 用于当所述车辆在所述阅读器的天线覆盖范围内行驶时， 记录所述标签按预设频率所发送信号的信息；  a recording module, configured to record information of a signal sent by the label at a preset frequency when the vehicle is traveling within an antenna coverage of the reader;
其中， 所述信息包括： 所述标签所标识的车辆信息、 接收所述信号的 天线信息、 所述阅读器接收所述信号的时间信息以及天线接收所述信号时 产生的 RSSI的信息； 判定模块， 用于当所述车辆驶离所述阅读器的天线覆盖范围后， 分别 获取所述车辆在所述阅读器天线覆盖范围内行驶时， 接收所述信号的每根 天线所产生的 RSSI的累加值， 并判定所述车辆在 RSSI的累加值最大的天 线所对应的车道内行驶； The information includes: vehicle information identified by the tag, antenna information for receiving the signal, time information of the reader receiving the signal, and information of an RSSI generated when the antenna receives the signal; a determining module, configured to: when the vehicle is driven away from the antenna coverage of the reader, respectively acquire an RSSI generated by each antenna that receives the signal when the vehicle travels within the coverage of the reader antenna And accumulating the vehicle, and determining that the vehicle is traveling in a lane corresponding to an antenna with the largest accumulated RSSI value;
上报模块， 用于上报所述车道的车道号信息以及所述车辆信息。  The reporting module is configured to report lane number information of the lane and the vehicle information.
8、 如权利要求 7所述阅读器， 其特征在于， 当所述阅读器接收所述标 签发送的信号时，  8. The reader according to claim 7, wherein when said reader receives a signal transmitted by said tag,
所述记录模块， 还用于确定所记录的信息中已经存在所述车辆对应的 信号的信息时， 将所述记录信息中所述接收信号的时间信息更新为接收当 前信号的时间， 并记录接收当前信号时产生的 RSSI的信息。  The recording module is further configured to: when the information of the signal corresponding to the vehicle already exists in the recorded information, update the time information of the received signal in the recorded information to the time of receiving the current signal, and record and receive Information about the RSSI generated when the current signal is present.
9、 如权利要求 8所述的阅读器， 其特征在于， 所述判定模块， 用于确 定当前时间与所述记录模块所记录的记录信息中阅读器接收信号的时间之 间的差值大于等于预设值时， 判定所述车辆已驶离阅读器天线覆盖范围。  The reader according to claim 8, wherein the determining module is configured to determine that a difference between a current time and a time when the reader receives a signal in the record information recorded by the recording module is greater than or equal to At the preset value, it is determined that the vehicle has left the reader antenna coverage.
10、 如权利要求 7所述的阅读器， 其特征在于， 若所述 RFID系统存在 多个阅读器， 则不同阅读器间通过 UDP的传输方式传输各自的 RSSI的累 加值， 以及 RSSI的累加值所对应的天线信息和车辆信息； 其中， 所述天线 信息包括： 天线对应的车道号信息、 天线所属阅读器信息以及天线在所属 阅读器的序号信息；  The reader according to claim 7, wherein if there are a plurality of readers in the RFID system, different readers transmit the accumulated values of the RSSIs and the accumulated values of the RSSIs by means of UDP transmission. Corresponding antenna information and vehicle information; wherein 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;
相应的，所述判定模块，用于获取所属阅读器设置的天线所产生的 RSSI 的累加值； 或者获取所属阅读器设置的天线所产生的 RSSI的累加值和其他 阅读器所设置的天线所产生的 RSSI的累加值， 并判定所述车辆在 RSSI的 累加值最大的天线所对应的车道内行驶。  Correspondingly, the determining module is configured to obtain an accumulated value of the RSSI generated by the antenna set by the reader; or obtain an accumulated value of the RSSI generated by the antenna set by the reader and an antenna generated by another reader. The accumulated value of the RSSI, and it is determined that the vehicle travels in the lane corresponding to the antenna with the largest RSSI accumulated value.
11、 如权利要求 10所述的阅读器， 其特征在于， 若 RSSI的最大累加 值对应的天线不是所述上报模块所属阅读器设置的天线， 则所述上报模块 不上报所述车道的车道号信息以及所述车辆信息。 The reader according to claim 10, wherein if the antenna corresponding to the maximum accumulated value of the RSSI is not the antenna set by the reader to which the reporting module belongs, the reporting module does not report the lane number of the lane. Information and the vehicle information.
12、一种识别车道号的系统，所述系统采用 RFID技术，所述系统包括： 设置于车辆中的标签、 阅读器以及多根天线； 所述多根天线设置于相同阅 读器或不同阅读器中； 其特征在于， 12. A system for identifying a lane number, the system employing RFID technology, the system comprising: a tag, a reader, and a plurality of antennas disposed in the vehicle; the plurality of antennas being disposed in the same reader or different readers Medium;
所述阅读器， 用于当所述车辆在自身的天线覆盖范围内行驶时， 记录 所述标签按预设频率所发送信号的信息；  The reader is configured to record information of a signal sent by the label at a preset frequency when the vehicle is traveling within its own antenna coverage;
其中， 所述信息包括： 所述标签所标识的车辆信息、 接收所述信号的 天线信息、 接收所述信号的时间信息以及天线接收所述信号时产生的 RSSI 的信息；  The information includes: vehicle information identified by the tag, antenna information for receiving the signal, time information of receiving the signal, and information of an RSSI generated when the antenna receives the signal;
所述阅读器， 还用于当所述车辆驶离自身的天线覆盖范围后， 获取所 述车辆在自身的天线覆盖范围内行驶时， 接收所述信号的每根天线所产生 的 RSSI的累加值， 并判定所述车辆在 RSSI的累加值最大的天线所对应的 车道内行驶； 还用于上报所述车道的车道号信息以及所述车辆信息。  The reader is further configured to acquire an accumulated value of RSSI generated by each antenna that receives the signal when the vehicle travels within its own antenna coverage after the vehicle is driven away from its antenna coverage. And determining that the vehicle is traveling in a lane corresponding to an antenna with the largest accumulated RSSI value; and is further configured to report lane number information of the lane and the vehicle information.
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