WO2024045887A1 - 一种光触发rfid识别方法及系统 - Google Patents

一种光触发rfid识别方法及系统 Download PDF

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Publication number
WO2024045887A1
WO2024045887A1 PCT/CN2023/105510 CN2023105510W WO2024045887A1 WO 2024045887 A1 WO2024045887 A1 WO 2024045887A1 CN 2023105510 W CN2023105510 W CN 2023105510W WO 2024045887 A1 WO2024045887 A1 WO 2024045887A1
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Prior art keywords
light
tag
reader
triggered
command
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PCT/CN2023/105510
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English (en)
French (fr)
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俞正明
伍继雄
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广东识芯微电子科技有限公司
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Publication of WO2024045887A1 publication Critical patent/WO2024045887A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
    • G06K17/0029—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device the arrangement being specially adapted for wireless interrogation of grouped or bundled articles tagged with wireless record carriers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10366—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of radio frequency identification, and in particular to a light-triggered RFID identification method and system.
  • RFID Radio Frequency Identification
  • RFID Radio Frequency Identification
  • the basic workflow is as follows: the electronic tag reader/writer sends a radio frequency signal of a specific working frequency through the radio frequency transmitting antenna.
  • the electronic tag enters the working coverage area of the reader/writer transmitting antenna, its antenna generates an induced current through inductance or electromagnetic space coupling, and activates Passive tags (for active tags, they do not need to be activated and are always in working state); part of the energy obtained by the tag is rectified into DC power and provided to the electronic circuit in the tag for work, and the other part is used by the data information stored in the tag.
  • the tag reader After modulation, it is reflected back to the tag reader through the tag antenna; the tag reader receives the carrier signal reflected from the electronic tag through the receiving antenna, demodulates and decodes the received signal, and obtains the identification data information stored in the electronic tag, and The identification data information is sent to the computer application system through the communication interface for processing.
  • the logistics sorting system is a key link in the logistics industry and directly affects the efficiency and cost of the entire industry.
  • Barcode is a visual recognition technology. When reading a barcode, the light source needs to shine directly on the surface of the barcode to be scanned. Therefore, during sorting, it is often necessary to manually or equipment to affix the barcode to the items. The barcode can only be recognized when the side is facing up; 2. The process of transportation or sorting can easily cause the surface of the barcode to be torn, stained, etc., and the barcode cannot be scanned at this time; 3. The barcode information can only be read and cannot be changed. , so it cannot well meet the needs for further refined management of the logistics sorting process.
  • RFID technology has been tried by many logistics companies due to its advantages such as non-contact wireless mobile identification, longer effective identification distance, faster identification speed, large tag data storage capacity, dynamic change of data information stored in tags, and strong environmental applicability. Used to replace barcoding technology in the sorting process.
  • items on the sorting belt need to be quickly identified and bound one by one, and no reading or omission can occur.
  • aviation logistics sorting Take aviation logistics sorting as an example. After passengers check in their luggage, the luggage sorting system needs to identify the luggage on the fast-moving conveyor belt one by one and track it with the flight passengers and pallet positions in the background. Only by binding the location number and other information can the baggage sorting and check-in be completed accurately.
  • the process of express logistics sorting is also similar.
  • the purpose of the present invention is to address the problems existing in the background technology and propose a light-triggered RFID identification method and system that converts optical signals into electrical signals to trigger RFID tag identification, which can quickly identify, locate and bind RFID tags, and avoid missed reading and Cross-reading improves sorting and positioning efficiency and reduces RFID system application costs.
  • the present invention proposes a light-triggered RFID identification method, including the following two light-triggered RFID access identification modes:
  • Direct light trigger mode The RFID reader emits a continuous pure carrier wave to provide energy to the tag, but does not send related reading commands. Within the coverage of the reader antenna, when the tag with a light induction detection device circuit receives a certain intensity of light When, the tag is directly triggered to send tag information including the ID number to the reader;
  • Command light trigger mode The RFID reader emits a continuous pure carrier wave to provide energy to the tag, and sends related read commands. Within the coverage of the reader antenna, when the tag with a light induction detection device circuit receives the read signal from the reader After receiving the command, the reader does not respond immediately. Instead, it triggers the tag to send tag information including the ID number to the reader when it receives a certain intensity of light.
  • the present invention proposes a light-triggered RFID identification system for implementing the above-mentioned light-triggered RFID identification method.
  • the light-triggered RFID identification system includes:
  • the tag is equipped with a working mode flag bit to select the direct light trigger mode, command light trigger mode or ordinary RFID identification mode according to the value of the flag bit, and is also equipped with a light signal induction detection device circuit for sensing, detecting and converting light signals. into an electrical signal, which triggers the tag to send tag information including the ID number to the reader;
  • the reader/writer is equipped with a working mode flag setting command, which can set the working mode flag of the tag at any time according to application needs during initialization or working process;
  • a light emitting device which is used to emit light and is located within the antenna coverage of the reader;
  • the tag light signal induction detection device is used to detect the light intensity and trigger the tag to send the tag information including the ID number to the reader when the light intensity reaches the preset intensity.
  • the light is visible light or invisible light.
  • the light emitting device includes the following three lighting modes: A1, A2 and A3:
  • the reader/writer electrically connected to the light-emitting device controls whether the light-emitting device emits light
  • the light emitting device is automatically triggered to emit light
  • the light emitting device is controlled by a person or a computer to emit light.
  • the tag has an electrically connected chip and an antenna, a photosensitive window is provided on the tag, and the photosensitive window is located correspondingly to the chip.
  • the reader/writer is equipped with a special tag access identification command process according to the two different light-triggered working modes set by it.
  • the transmitting channel of the reader continues or accepts external control signals to continuously transmit pure carrier signals for a period of time; accordingly, the receiving channel continues or is synchronized with the transmitting channel for a period of time. It is continuously waiting to receive tag information.
  • the RFID identification system when the RFID identification system is in the direct light triggering mode, if a tag is within the antenna coverage of the reader and receives sufficient electromagnetic wave radiation energy, when the tag is triggered by the light emitted by the light emitting device, Just send the tag information including the ID number directly.
  • the transmitting channel of the reader alternately transmits pure carrier signals or related tag reading commands according to the provisions of the command process; the receiving channel continues to be in the state of waiting to receive tag information, and according to the command
  • the regulations of the process cooperate with the emission channel to complete the tag reading process.
  • the RFID identification system when the RFID identification system is in the command light trigger mode, if a tag is within the antenna coverage of the reader and has received enough electromagnetic wave radiation energy, when the tag receives the read command from the reader, and The reader does not respond immediately, but when a certain intensity of light is received and the conditions required by the relevant command process and anti-collision algorithm are met, the tag is triggered to send tag information including the ID number to the reader.
  • the present invention has the following beneficial technical effects:
  • the invention can be applied in fields such as logistics sorting, can convert optical signals into electrical signals, and can quickly realize tag identification, positioning and binding through light-triggered RFID technology through direct light-triggering mode and command light-triggering mode.
  • the invention can effectively avoid the problems of missed reading and interrogation of RFID tags in application scenarios such as rapid item sorting and large-capacity dense item positioning and identification, and can efficiently obtain tag information including tag ID numbers, improving logistics sorting and positioning. efficiency, reducing the cost of using the RFID system.
  • Figure 1 is a flow chart for reporting tag information such as ID number in direct light trigger mode, command light trigger mode and ordinary RFID identification mode;
  • Figure 2 is a schematic diagram of a light-triggered RFID tag.
  • the present invention proposes a new identification method, that is, a light-triggered RFID identification method, which includes the following two light-triggered RFID access identification modes:
  • Direct light trigger mode The RFID reader emits a continuous pure carrier wave (CW) to provide energy to the tag, but does not send related read commands. Within the coverage of the reader antenna, when the tag with a light induction detection device circuit receives a certain When the intensity of light is high, the tag is directly triggered to send tag information including the ID number to the reader;
  • CW continuous pure carrier wave
  • Command light trigger mode The RFID reader emits a continuous pure carrier wave to provide energy to the tag, and sends related read commands. Within the coverage of the reader antenna, when the tag with a light induction detection device circuit receives the read signal from the reader After receiving the command, the reader does not respond immediately. Instead, it triggers the tag to send tag information including the ID number to the reader when it receives a certain intensity of light.
  • a light-triggered RFID identification system proposed by the present invention is used to implement the light-triggered RFID identification method in Embodiment 1.
  • the light-triggered RFID identification system includes tags, readers and writers, light-emitting devices and tag light signal induction detection devices.
  • the tag is equipped with a working mode flag bit to select the direct light trigger mode, command light trigger mode or ordinary RFID identification mode according to the value of the flag bit. It is also equipped with a light signal induction detection device circuit for sensing and detecting light signals and converting them into electrical signals. signal, and then triggers the tag to send tag information including the ID number to the reader.
  • the tag has an electrically connected chip 1 and an antenna 3.
  • the tag is provided with a photosensitive window 2, and the photosensitive window 2 is located correspondingly to the chip 1.
  • the reader/writer is equipped with a working mode flag setting command. During the initialization or working process, the working mode flag of the tag can be set at any time according to the application needs.
  • the reader/writer is equipped with a special setting command according to the two different light-triggered working modes set by it.
  • Tag access identification command process when the RFID identification system is in direct light trigger mode, the transmitting channel of the reader continues or accepts external control signals to continuously transmit pure carrier signals within a period of time; accordingly, the receiving channel continues or is synchronized with the transmitting The channel is continuously waiting to receive tag information for a period of time; when the RFID identification system is in the direct light trigger mode, if a tag is within the antenna coverage of the reader and receives sufficient electromagnetic wave radiation energy, when the tag is illuminated by light After being triggered by the light emitted by the transmitting device, the tag information including the ID number is directly sent.
  • the transmitting channel of the reader alternately transmits pure carrier signals or related tag reading commands according to the provisions of the command process; the receiving channel continues to be in the state of waiting to receive tag information, and cooperates with the transmitting channel to complete the tag reading according to the provisions of the command process. reading process.
  • the RFID identification system is in the command light trigger mode, if a tag is within the antenna coverage of the reader and has received enough electromagnetic radiation energy, the tag will not respond immediately after receiving the read command from the reader.
  • the reader/writer only triggers the tag to send tag information including the ID number to the reader/writer when it receives a certain intensity of light and meets the conditions required by the relevant command process and anti-collision algorithm.
  • the light-emitting device is used to emit light, which is visible light or invisible light.
  • the light-emitting device is located within the coverage of the reader's antenna.
  • the light-emitting device includes the following three light-emitting modes: A1, A2 and A3:
  • the reader/writer electrically connected to the light-emitting device controls whether the light-emitting device emits light
  • the light emitting device is automatically triggered to emit light
  • the light emitting device is controlled by a person or a computer to emit light.
  • the tag light signal induction detection device is used to detect the light intensity and trigger the tag to send tag information including the ID number to the reader when the light intensity reaches the preset intensity.
  • This embodiment proposes a light-triggered RFID identification system.
  • the process of tags sending ID numbers is as follows:
  • the tag receives the energy radiated by the electromagnetic wave and converts it into the DC working power supply for its own work.
  • the logic processor can start to work normally, indicating that the power-on is completed. After the tag is powered on, it will automatically enter the third mode according to the setting state of the working mode flag.
  • One of the working modes no matter which mode the tag works in, when it is not sending information to the reader, it is in a state of receiving commands from the reader;
  • the tag When the tag is in the command light trigger mode, it can be used in conjunction with a timer or a photoeye connected to the reader and other devices;
  • the tag processor performs mode conversion according to the status of the working mode flag:
  • Direct light triggering mode includes the following steps B1.1-B1.3:
  • the tag processor detects whether the light trigger signal is received
  • the tag processor determines the light trigger signal, the tag sends information including its own ID number to the reader;
  • the command light trigger mode includes the following steps C1.1-C1.4:
  • the tag processor detects whether the light trigger signal is received
  • the tag processor determines the light trigger signal and receives a certain intensity of light, the tag sends information including its own ID number according to the reader/writer instructions;
  • the invention can be applied in fields such as logistics sorting, can convert optical signals into electrical signals, and can quickly realize tag identification, positioning and binding through light-triggered RFID technology through direct light-triggering mode and command light-triggering mode.
  • the invention can effectively avoid the problems of missed reading and interrogation of RFID tags in application scenarios such as rapid item sorting and large-capacity dense item positioning and identification, and can efficiently obtain tag information including tag ID numbers, improving logistics sorting and positioning. efficiency, reducing the cost of using the RFID system.

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Abstract

本发明涉及无线射频识别领域，具体为一种光触发RFID识别方法及系统。其包括如下两种光触发RFID接入识别模式：直接光触发模式：RFID读写器发射连续纯载波给标签提供能量，当具有光感应检测装置电路的标签接收到一定强度的光照时，直接触发标签向读写器发送包括ID号在内的标签信息；命令光触发模式：当具有光感应检测装置电路的标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，才触发标签向读写器发送包括ID号在内的标签信息。本发明能将光信号转变为电信号，并触发RFID系统的标签接入识别，在多标签密集识读应用中，能快速识别、定位、绑定标签，有效避免标签的漏读与窜读，提高分拣、定位效率，降低RFID系统应用成本。

Description

一种光触发RFID识别方法及系统 技术领域
本发明涉及射频识别领域，特别是涉及一种光触发RFID识别方法及系统。
背景技术
RFID(Radio Frequency Identification，即射频识别)技术也被称为电子标签技术，是一种非接触的自动识别技术，其基本工作原理是利用射频信号和电感或电磁空间耦合传输特性，实现对被识别物体的自动识别。RFID系统一般由三部分组成：RFID电子标签(Tag)、读写器(Reader)和计算机应用系统。
基本工作流程如下：电子标签读写器通过射频发射天线发送特定工作频率的射频信号，当电子标签进入读写器发射天线的工作覆盖区域时，其天线通过电感或电磁空间耦合产生感应电流,激活无源标签(对于有源标签而言，不需激活，始终处于工作状态)；标签获得的能量一部分被整流为直流电源提供给标签内的电子电路进行工作，另一部分被标签内保存的数据信息调制后经过标签天线反射回标签读写器；标签读写器通过接收天线接收到从电子标签反射回来的载波信号，对接收信号进行解调和解码，得到电子标签中保存的标识数据信息，并把该标识数据信息通过通信接口送给计算机应用系统进行处理。
物流分拣系统是物流行业的一个关键环节，直接影响整个行业的效率和成本。常见的物品分拣方法有三种：人工分拣、半自动机械分拣和自动分拣。
在自动分拣系统中，物品标签的识别又是关键核心技术之一，直接影响自动分拣的速度和差错率。传统的标签识别技术是条形码，在分拣过程中，通过对条码的识别来达到对物品的分拣处理。条码识别技术存在以下不足之处：1、条码是可视识别技术，读取条码时需光源直射到条码表面才能被扫描到，因此在分拣时，往往需要人工或设备将物品贴有条码的一面朝上，才能识别到条码；2、运输或分拣的过程容易造成条码的表面被撕裂、污损等，此时就无法扫描到条码；3、条码信息只能读取，不能更改，因此不能很好地满足物流分拣过程的进一步精细化管理需求。
RFID技术由于具有可非接触式无线移动识别、有效识别距离更远、识别速度更快、标签数据存储容量大、标签存储的数据信息可动态更改、环境适用性强等优点，被许多物流企业尝试在分拣环节用于替代条码技术。但在物流分拣等应用场景中，分拣带上的物品需要快速地进行一一识别绑定，不能发生窜读和漏读。以航空物流分拣为例，当旅客将行李托运后，行李分拣系统需要将快速运转的传送带上的行李进行一一识别并跟后台的航班旅客及托盘位 置编号等信息绑定，才能准确无误地完成行李的分拣托运。快递物流分拣的处理过程也类似。
为了解决漏读问题，一般需要将RFID读写设备的输出功率加大，但加大功率，又反过来会造成前后物品RFID标签的窜读。漏读与窜读问题给分拣过程的标签一一识别绑定造成了很大的困扰，需要增加很多额外的措施来解决，既增加了系统成本，也影响了分拣效率。
发明内容
本发明目的是针对背景技术中存在的问题，提出一种将光信号转变成电信号触发RFID标签识别的光触发RFID识别方法及系统，能快速识别、定位、绑定RFID标签，避免漏读与窜读，提高分拣、定位效率，降低RFID系统应用成本。
一方面，本发明提出一种光触发RFID识别方法，包括如下两种光触发RFID接入识别模式：
直接光触发模式：RFID读写器发射连续纯载波给标签提供能量，但不发送相关读取命令，在读写器天线覆盖范围内，当具有光感应检测装置电路的标签接收到一定强度的光照时，直接触发标签向读写器发送包括ID号在内的标签信息；
命令光触发模式：RFID读写器发射连续纯载波给标签提供能量，并发送相关读取命令，在读写器天线覆盖范围内，当具有光感应检测装置电路的标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，才触发标签向读写器发送包括ID号在内的标签信息。
另一方面，本发明提出一种光触发RFID识别系统，用于实施上述光触发RFID识别方法，光触发RFID识别系统包括：
标签，其增设有工作模式标志位以根据标志位的值选择进入直接光触发模式、命令光触发模式或普通RFID识别模式，并增设有光信号感应检测装置电路以用于感应检测光信号并转换成电信号，进而触发标签向读写器发送包括ID号在内的标签信息；
读写器，其增设有工作模式标志位设置命令，在初始化或工作过程中根据应用需要随时设置标签的工作模式标志位；
光发射装置，其用于发射光，且位于读写器的天线覆盖范围内；
标签光信号感应检测装置，其用于检测光照强度并在光照强度达到预设强度时触发标签向读写器发送包括ID号在内的标签信息。
优选的，光为可见光或不可见光。
优选的，光发射装置包括如下A1、A2和A3共三种发光方式：
A1、由与光发射装置电性连接的读写器控制光发射装置发光与否；
A2、当移动状态的标签暴露于预定的光照设定区域后自动触发光发射装置发光；
A3、由人或电脑控制光发射装置发光。
优选的，标签具有电性连接的芯片和天线，标签上设置有感光窗口，感光窗口对应位于芯片处。
优选的，读写器根据其设置的两种不同的光触发工作模式，增设有专门的标签接入识别命令流程。
优选的，当RFID识别系统处于直接光触发模式时，读写器的发射通道持续或接受外部控制信号在一段时间内连续发射纯载波信号；相应地，接收通道持续或同步于发射通道在一段时间内连续处于等待接收标签信息。
优选的，当RFID识别系统处于直接光触发模式时，如果有标签处于读写器的天线覆盖范围内，并接收到足够的电磁波辐射能量，当该标签被光发射装置所发射的光触发后，就直接发送包括ID号在内的标签信息。
优选的，当RFID识别系统处于命令光触发模式时，读写器的发射通道根据命令流程的规定交替发射纯载波信号或相关标签读取命令；接收通道持续处于等待接收标签信息状态，并根据命令流程的规定配合发射通道完成标签的读取过程。
优选的，当RFID识别系统处于命令光触发模式时，如果有标签处于读写器的天线覆盖范围内且已接收到足够的电磁波辐射能量，当标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，且满足相关命令流程及防冲突算法要求的条件后，才触发标签向读写器发送包括ID号在内的标签信息。
与现有技术相比，本发明具有如下有益的技术效果：
本发明能应用在物流分拣等领域中，能将光信号转变为电信号，能通过直接光触发模式和命令光触发模式来快速通过光触发RFID技术实现标签识别、定位和绑定。本发明能有效避免快速物品分拣、大容量密集物品定位识别等应用场景中RFID标签的漏读与窜读问题，能高效的获取包括标签ID号在内的标签信息，提高物流分拣、定位效率，降低了RFID系统的使用成本。
附图说明
图1为标签在直接光触发模式、命令光触发模式和普通RFID识别模式下ID号等标签信息的上报流程图；
图2为光触发RFID标签示意图。
附图标记：1、芯片；2、感光窗口；3、天线。
具体实施方式
实施例一
在现有RFID系统中，处于读写器天线覆盖范围内的标签，当其接收到足够的能量并收到读写器发出的读取命令后，在防冲突机制内会逐个随机地响应读写器并返回ID号等标签信息。天线覆盖范围内的所有标签响应读写器的机会是均等、随机的。如图1所示，本发明提出新的识别方法，即一种光触发RFID识别方法，该方法包括如下两种光触发RFID接入识别模式：
直接光触发模式：RFID读写器发射连续纯载波(CW)给标签提供能量，但不发送相关读取命令，在读写器天线覆盖范围内，当具有光感应检测装置电路的标签接收到一定强度的光照时，直接触发标签向读写器发送包括ID号在内的标签信息；
命令光触发模式：RFID读写器发射连续纯载波给标签提供能量，并发送相关读取命令，在读写器天线覆盖范围内，当具有光感应检测装置电路的标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，才触发标签向读写器发送包括ID号在内的标签信息。
还包括兼容现有RFID国际/国内标准(如国际标准ISO/IEC 18000-6C等)的工作模式，使系统的兼容性更好。
实施例二
如图1和图2所示，本发明提出的一种光触发RFID识别系统，用于实施实施例一中的光触发RFID识别方法。光触发RFID识别系统包括标签、读写器、光发射装置和标签光信号感应检测装置。
标签增设有工作模式标志位以根据标志位的值选择进入直接光触发模式、命令光触发模式或普通RFID识别模式，并增设有光信号感应检测装置电路以用于感应检测光信号并转换成电信号，进而触发标签向读写器发送包括ID号在内的标签信息，标签具有电性连接的芯片1和天线3，标签上设置有感光窗口2，感光窗口2对应位于芯片1处。
读写器增设有工作模式标志位设置命令，在初始化或工作过程中根据应用需要随时设置标签的工作模式标志位，读写器根据其设置的两种不同的光触发工作模式，增设有专门的标签接入识别命令流程；当RFID识别系统处于直接光触发模式时，读写器的发射通道持续或接受外部控制信号在一段时间内连续发射纯载波信号；相应地，接收通道持续或同步于发射通道在一段时间内连续处于等待接收标签信息；当RFID识别系统处于直接光触发模式时，如果有标签处于读写器的天线覆盖范围内，并接收到足够的电磁波辐射能量，当该标签被光发射装置所发射的光触发后，就直接发送包括ID号在内的标签信息。当RFID识别系统处于命令 光触发模式时，读写器的发射通道根据命令流程的规定交替发射纯载波信号或相关标签读取命令；接收通道持续处于等待接收标签信息状态，并根据命令流程的规定配合发射通道完成标签的读取过程。当RFID识别系统处于命令光触发模式时，如果有标签处于读写器的天线覆盖范围内且已接收到足够的电磁波辐射能量，当标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，且满足相关命令流程及防冲突算法要求的条件后，才触发标签向读写器发送包括ID号在内的标签信息。
光发射装置用于发射光，光为可见光或不可见光，光发射装置位于读写器的天线覆盖范围内，光发射装置包括如下A1、A2和A3共三种发光方式：
A1、由与光发射装置电性连接的读写器控制光发射装置发光与否；
A2、当移动状态的标签暴露于预定的光照设定区域后自动触发光发射装置发光；
A3、由人或电脑控制光发射装置发光。
标签光信号感应检测装置用于检测光照强度并在光照强度达到预设强度时触发标签向读写器发送包括ID号在内的标签信息。
实施例三
本实施例提出的一种光触发RFID识别系统，标签发送ID号的流程如下：
S1、标签接收到电磁波辐射的能量，转换为自己工作的直流工作电源，逻辑处理器可以开始正常工作，表示上电完成，标签上电后，根据工作模式标志位的设置状态，自动进入到三种工作模式中的一种；不管标签工作于何种模式，不向读写器发送信息时，均处于接收读写器命令的状态；
当标签处于命令光触发模式时，可与定时器或连接于读写器的光眼等设备配合使用；
S2、标签处理器根据工作模式标志位状态进行模式转换：
直接光触发模式包括如下步骤B1.1-B1.3：
B1.1、当进入直接光触发模式时，标签处理器检测光触发信号是否有接收到；
B1.2、当标签处理器确定光触发信号后，标签向读写器发送包括自己ID号在内的信息；
B1.3、包括标签ID号在内的信息被发送完毕后，进入接收指令状态，如果在规定时间内没有收到读写器指令，盘点周期结束，标签下电；
命令光触发模式包括如下步骤C1.1-C1.4：
C1.1、当进入命令光触发模式时，标签是否接收到读写器的读取命令；
C1.2、当标签接收到读写器的读取命令后，标签处理器检测光触发信号是否有接收到；
C1.3、当标签处理器确定光触发信号，且接收到一定强度的光照时，标签根据读写器指令发送包括自己ID号在内的信息；
C1.4、包括标签ID号在内的信息被发送完毕后，进入接收指令状态，如果在规定时间内没有收到修改模式指令，盘点周期结束，标签下电。
本发明能应用在物流分拣等领域中，能将光信号转变为电信号，能通过直接光触发模式和命令光触发模式来快速通过光触发RFID技术实现标签识别、定位和绑定。本发明能有效避免快速物品分拣、大容量密集物品定位识别等应用场景中RFID标签的漏读与窜读问题，能高效的获取包括标签ID号在内的标签信息，提高物流分拣、定位效率，降低了RFID系统的使用成本。
上面结合附图对本发明的实施方式作了详细说明，但是本发明并不限于此，在所属技术领域的技术人员所具备的知识范围内，在不脱离本发明宗旨的前提下还可以作出各种变化。

Claims (9)

  1. 一种光触发RFID识别方法，其特征在于，包括：
    标签接收到电磁波辐射的能量，转换为自己工作的直流工作电源，逻辑处理器可以开始正常工作，表示上电完成，标签上电后，根据工作模式标志位的设置状态，自动进入到三种工作模式中的一种，其中，所述三种工作模式包括直接光触发模式、命令光触发模式以及普通RFID识别模式；
    读写器，其增设有工作模式标志位设置命令，在初始化或工作过程中根据应用需要随时设置标签的工作模式标志位；
    在直接光触发模式中，RFID读写器发射连续纯载波给标签提供能量，但不发送相关读取命令，在读写器天线覆盖范围内，当具有光感应检测装置电路的标签接收到一定强度的光照时，直接触发标签向读写器发送包括ID号在内的标签信息；
    在命令光触发模式中，RFID读写器发射连续纯载波给标签提供能量，并发送相关读取命令，在读写器天线覆盖范围内，当具有光感应检测装置电路的标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，才触发标签向读写器发送包括ID号在内的标签信息。
  2. 一种光触发RFID识别系统，用于实施权利要求1所述的光触发RFID识别方法，其特征在于，包括：
    标签，其增设有工作模式标志位以根据标志位的值选择进入直接光触发模式、命令光触发模式或普通RFID识别模式，并增设有光信号感应检测装置电路以用于感应检测光信号并转换成电信号，进而触发标签向读写器发送包括ID号在内的标签信息；
    读写器，其增设有工作模式标志位设置命令，在初始化或工作过程中根据应用需要随时设置标签的工作模式标志位；
    光发射装置，其用于发射光，且位于读写器的天线覆盖范围内，光为可见光或不可见光；
    标签光信号感应检测装置，其用于检测光照强度并在光照强度达到预设强度时触发标签向读写器发送包括ID号在内的标签信息。
  3. 根据权利要求2所述的光触发RFID识别系统，其特征在于，光发射装置包括如下A1、A2和A3共三种发光方式：
    A1、由与光发射装置电性连接的读写器控制光发射装置发光与否；
    A2、当移动状态的标签暴露于预定的光照设定区域后自动触发光发射装置发光；
    A3、由人或电脑控制光发射装置发光。
  4. 根据权利要求2所述的光触发RFID识别系统，其特征在于，标签具有电性连接的芯片和天线，标签上设置有感光窗口，感光窗口对应位于芯片处。
  5. 根据权利要求2所述的光触发RFID识别系统，其特征在于，读写器根据其设置的两种不同的光触发工作模式，增设有专门的标签接入识别命令流程。
  6. 根据权利要求2或5所述的光触发RFID识别系统，其特征在于，当RFID识别系统处于直接光触发模式时，读写器的发射通道持续或接受外部控制信号在一段时间内连续发射纯载波信号；相应地，接收通道持续或同步于发射通道在一段时间内连续处于等待接收标签信息。
  7. 根据权利要求2或5所述的光触发RFID识别系统，其特征在于，当RFID识别系统处于直接光触发模式时，如果有标签处于读写器的天线覆盖范围内，并接收到足够的电磁波辐射能量，当该标签被光发射装置所发射的光触发后，就直接发送包括ID号在内的标签信息。
  8. 根据权利要求2或5所述的光触发RFID识别系统，其特征在于，当RFID识别系统处于命令光触发模式时，读写器的发射通道根据命令流程的规定交替发射纯载波信号或相关标签读取命令；接收通道持续处于等待接收标签信息状态，并根据命令流程的规定配合发射通道完成标签的读取过程。
  9. 根据权利要求2或5所述的光触发RFID识别系统，其特征在于，当RFID识别系统处于命令光触发模式时，如果有标签处于读写器的天线覆盖范围内且已接收到足够的电磁波辐射能量，当标签接收到读写器的读取命令后，并不马上响应读写器，而是当接收到一定强度的光照时，且满足相关命令流程及防冲突算法要求的条件后，才触发标签向读写器发送包括ID号在内的标签信息。
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