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A method and application for measuring the moving speed and direction of passive uhf RFID tags

A technology of moving speed and tags, applied in the electronic field, can solve the problem that there is no way to measure the speed and moving direction of passive tags, and achieve the effect of being suitable for large-scale promotion and the method is accurate and efficient

Active Publication Date: 2019-02-05
智坤(江苏)半导体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for measuring the moving speed and direction of passive UHF RFID tags, so as to solve the problem that the existing UHF RFID readers have no way to measure the speed and moving direction of passive tags

Method used

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  • A method and application for measuring the moving speed and direction of passive uhf RFID tags
  • A method and application for measuring the moving speed and direction of passive uhf RFID tags
  • A method and application for measuring the moving speed and direction of passive uhf RFID tags

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Embodiment 1

[0025] exist figure 1 In the traditional passive UHF RFID system shown, the passive tag moves towards the reader antenna or away from the reader antenna at a certain speed, and the traditional UHF RFID reader has no way to measure the passive tag speed and direction of movement.

[0026] The present invention proposes an algorithm for measuring the speed and direction of a mobile tag applied in a passive UHF RFID reader system, such as figure 2 The hardware circuit diagram of the method embodiment is given.

[0027] Among them, UHF RFID reader includes RF transceiver front-end, digital baseband signal processing and microcontroller, and its operation relationship is:

[0028] 1. The transmitting baseband data forming filter in the digital baseband signal processing part generates the encoded baseband data and sends it to the digital-to-analog conversion circuit to become an analog signal, and the image frequency component and out-of-band noise are filtered out by the analog...

Embodiment 2

[0044] The above method of measuring the moving speed and direction of the passive UHF RFID tag can be applied in the electronic identification of automobiles: each car is pasted with a passive electronic tag, and the reader device at the intersection can measure the moving speed and direction information of the electronic tag, You can fully know the traffic flow information, know whether there is congestion or traffic accidents, whether more cars enter or leave a certain intersection, whether it is necessary to adjust the anti-collision algorithm to accurately read the electronic identification of each car, so as to realize intelligent transportation management.

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Abstract

The invention discloses a system of measuring a passive UHF RFID tag movement speed and direction, comprising a radio frequency transmit-receive front end, a digital baseband signal processing portion and a microcontroller. The invention also discloses a measuring method of the system, comprising a UHF RFID reader-writer and a special algorithm. The system can measure the passive tag movement speed and direction which can not be realized by a present UHF RFID reader-writer; the method is accurate, efficient, simple and practicable, and is suitable for large scale popularization.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to a method and application for measuring the moving speed and direction of a passive UHF RFID tag. Background technique [0002] The Internet of things (Internet of things) is an important trend in the development of information networks at present. It is called the third wave of the world's information industry after computers and the Internet. Among them, radio frequency identification technology RFID has become one of the key technologies of the Internet of things. RFID technology is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. It has been widely used in recent years due to its advantages such as good, simultaneous identification of multiple tags, easy large information storage, and rewritable data. [0003] In the passive UHF RFID system, the passive tag moves tow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/66G01P13/04
CPCG01P3/66G01P13/04
Inventor 江汉斯科特.邱杨青松朱晓东
Owner 智坤(江苏)半导体有限公司
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