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Accurate positioning device and method for passive RFID tag

An RFID tag and precise positioning technology, which is applied in the direction of cooperative operation devices, record carriers used by machines, and inductive record carriers, can solve the problems of passive RFID tag drive, batch query and positioning, and passive use. Achieve the effect of simple design, high positioning accuracy and strong adaptability

Active Publication Date: 2022-03-22
SHANDONG HUAYI MICRO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent document CN113030860A discloses a method for positioning by the color, brightness and duration of the light emitted by the RFID positioning tag, but the tag requires a built-in battery, so it cannot be used for passive RFID
Although this document uses radio frequency to identify items in the area, when the LED is used for RFID tag object identification and flashing prompts, it is realized by the card reader controlling an additional wireless communication module. Due to power problems, it cannot be directly detected by passive RFID tags. drive
[0011] In addition, combined with the analysis of the above patent documents, it can be seen that the positioning of RFID requires the support of database management and wireless network communication, and the cost is relatively high; and only one specified tag can be operated at a time, and batch query and positioning cannot be performed.

Method used

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  • Accurate positioning device and method for passive RFID tag
  • Accurate positioning device and method for passive RFID tag
  • Accurate positioning device and method for passive RFID tag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Such as figure 2 As shown, a precise positioning device for a passive RFID tag includes: a passive RFID tag and an external LED light, and the passive RFID tag includes a radio frequency module, a control module, a memory and an LED drive unit;

[0066] The radio frequency module is used for wireless radio frequency communication with the reader-writer; the control module is used for analyzing the LED control instruction with screening parameters sent by the reader-writer, and responding; the memory module is used for saving the corresponding item Identification information; the LED drive unit is used to drive the LED light on or off according to the response.

Embodiment 2

[0068] Such as figure 1 As shown, utilize the positioning method of the precise positioning device of the passive RFID tag as described in Embodiment 1, comprising:

[0069] (1) Externally connect the passive RFID tag with an adapted LED light; record the identification information of the corresponding item in the memory module in advance;

[0070] (2) Use the reader to send LED control commands with screening parameters, the screening parameters include: command code (Code) part, LED control (Ctrl) part, comparison value (Value) part and behavior (Action) part;

[0071] The instruction code (Code) part is the instruction code of the LED control instruction; the LED control (Ctrl) part is used to control the LED on or off: for example, 1 means on, 0 means off; the comparison value (Value) part is used Comparing with the identification information: if they are the same, the identification information matches the LED control instruction; if not, the identification information d...

Embodiment 3

[0080] As in the positioning method described in embodiment 2, the screening parameters also include: a start address (Pointer) part and a data length (Len) part; determine the Identify the filter data in the message, and compare the filter data with the comparison value (Value) part:

[0081] If they are the same, the identification information matches the LED control instruction;

[0082] If not, the identification information does not match the LED control instruction.

[0083] In the step (3), the radio frequency module receives the LED control instruction, and the control module reads the identification information of the corresponding item in the memory module, and then performs data information matching.

[0084] When the data length (Len) part corresponding to the screening parameter in the LED control instruction is 0, it means that all passive RFID tags are screened through the LED control instruction.

[0085] The present invention screens out part of the content ...

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PUM

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Abstract

The invention discloses an accurate positioning device and method for a passive RFID tag, and belongs to the technical field of RFID chip design. The accurate positioning device comprises the passive RFID tag and an external LED lamp; the passive RFID tag comprises a radio frequency module, a control module, a memory and an LED driving unit. The radio frequency module is used for wireless radio frequency communication with a reader-writer; the control module is used for analyzing an LED control instruction with screening parameters sent by the reader-writer and making a response; the memory module is used for storing identification information of a corresponding article; and the LED driving unit is used for driving the LED lamp to be turned on or turned off according to the response. The method is flexible in design and simple in logic control, the problem that wireless positioning is prone to environmental interference is avoided, and meanwhile extra time, area and other hardware expenses are reduced.

Description

technical field [0001] The invention discloses a device and method for precise positioning of a passive RFID tag, belonging to the technical field of RFID chip design. Background technique [0002] Radio frequency identification is radio frequency identification technology, English Radio Frequency Identification, RFID, is a kind of automatic identification technology, through radio frequency means for non-contact two-way data communication, using radio frequency means to read the recording media, that is, electronic tags or radio frequency cards Write, so as to achieve the purpose of identifying targets and data exchange. [0003] In the above identification system, the reading, writing and communication of electronic tags are realized through electromagnetic waves. According to the communication distance, it can be divided into near-field and far-field. For this reason, the data exchange method between the read / write device and the electronic tag is also correspondingly di...

Claims

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Application Information

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IPC IPC(8): G06K7/10G06K17/00G06K19/077
CPCG06K7/10099G06K17/0029G06K19/07705Y02D30/70
Inventor 韩英李向宏王伟刘文兵王丹单涛
Owner SHANDONG HUAYI MICRO ELECTRONICS
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