Radio frequency tag capable of controlling read-write and monitoring method thereof

A technology of radio frequency tags and readers, which is applied in the direction of cooperative devices, record carriers used by machines, and instruments

Active Publication Date: 2010-06-30
SHANGHAI HUASHEN INTELLIGENT IC CARD APPL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing RF tags cannot meet this requirement without I / O functions.

Method used

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  • Radio frequency tag capable of controlling read-write and monitoring method thereof
  • Radio frequency tag capable of controlling read-write and monitoring method thereof
  • Radio frequency tag capable of controlling read-write and monitoring method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] This read-write and controllable radio frequency tag is a magnetically controlled "prohibit / read-write" radio frequency tag. see image 3 , this read-write controllable radio frequency tag includes a tag chip 1 and a tag antenna 2, the tag chip 1 is connected to the tag antenna 2, and the radio frequency tag also includes a third-party sensitive element 3 controlled by a third-party factor , the third-party sensitive element 3 is connected with the tag antenna 2, and the third-party sensitive element 3 is arranged at a position that can make the tag antenna 2 form a closed loop or open a closed loop, and the third-party sensitive element 3 is in the third-party element. Under the action of switching between the two states of on or off, when the radio frequency tag is an ultra-high frequency RFID tag, the on or off state of the third-party sensitive element makes the impedance match or mismatch between the tag antenna and the tag chip; when the radio frequency tag is Wh...

Embodiment 2

[0137] The difference between this embodiment and Embodiment 1 is that: please refer to image 3 , the third-party factor is the pressure (air pressure) of the environment where the radio frequency tag is located, and the third-party sensitive element 3 is a pressure sensor. This read-write and controllable radio frequency tag is a voltage-controlled "prohibit / read-write" radio frequency tag.

[0138] By adding a pressure sensor (ie, a third-party sensitive element 3) inside the existing radio frequency tag, that is, replacing the dry reed switch in Example 1 with a pressure sensor, this pressure-controlled "prohibit / read / write" radio frequency tag is formed. This voltage-controlled "forbidden / read-write" radio frequency tag enables users to know whether the air pressure in a specific environment has changed without being in a specific environment. In today's life, most of the applied pressure sensors sense changes in ambient air pressure through resistance strain gauges, tha...

Embodiment 3

[0142] The difference between this embodiment and Embodiment 1 or Embodiment 2 is: please refer to Figure 8 , the radio frequency tag is a low frequency tag radio frequency tag, and the third-party sensitive element 3 is connected in the connection loop between the tag chip 1 and the tag antenna 2 . The third-party factor is the temperature of the environment where the radio frequency tag is located, and the third-party sensitive element 3 is a temperature sensor. This read-write controllable radio frequency tag is a temperature-controlled "prohibit / read-write" radio frequency tag. The working principle of this temperature-controlled RFID tag is basically the same as that of a voltage-controlled RFID tag, the difference is that one detects ambient air pressure and the other is ambient temperature. The radio frequency tag can be applied to the cultivation room of some fungi, vaccines, etc., to provide users with real-time temperature monitoring.

[0143] The invention can be...

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PUM

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Abstract

The invention discloses a radio frequency tag capable of controlling read-write. The radio frequency tag comprises a tag chip, a tag antenna and a third-party sensitive element, wherein the tag antenna and the tag chip are connected with the third-party sensitive element, the third-party sensitive element switches between on and off under the action of a third-party factor, when the radio frequency tag is an ultrahigh frequency RFID tag, the on or off of the third-party sensitive element enables the impedance match or impedance mismatch between the tag antenna and the tag chip; and when the radio frequency tag is a high frequency RFID tag or a low frequency RFID tag, the on or off of the third-party sensitive element ensures that the tag antenna and the tag chip can be successful connected or disconnected. The invention also discloses a monitoring method of the radio frequency tag capable of controlling read-write. The radio frequency tag without I / O function of the invention can be used to obtain the physical condition and external environment of the radio frequency tag and expand the applications of the radio frequency tag.

Description

technical field [0001] The invention relates to a radio frequency tag and a monitoring method thereof. Background technique [0002] In today's society with increasingly advanced technology, wireless communication technology and applications are also developing vigorously. Radio frequency tag, RFID (Radio Frequency Identification), also known as electronic tag, as one of the main applications of radio near field communication, has been widely used in all walks of life. Radio frequency identification technology is an automatic identification technology that began to rise in the 1990s. It is a technology that uses radio frequency signals to realize contactless information transmission through spatial coupling (alternating magnetic field or electromagnetic field) and achieve identification purposes through the transmitted information. . Radio frequency tags include ultra high frequency radio frequency tags (UHF RFID), high frequency radio frequency tags (HF RFID) and low freq...

Claims

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Application Information

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IPC IPC(8): G06K19/073G06K17/00
Inventor 王洁民陈伟丰
Owner SHANGHAI HUASHEN INTELLIGENT IC CARD APPL SYST
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