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Printed RFID sensor tag

a sensor tag and printed technology, applied in the direction of printed circuit aspects, antennas, antenna supports/mountings, etc., can solve the problems that the rfid tag cannot sense multiple targets of various physical or chemical properties, and the high-frequency rfid sensor cannot be used to sense targets in a long distan

Active Publication Date: 2019-05-30
BGT MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a printed RFID sensor tag that has multiple sensing materials capable of sensing different targets. The RFID sensor includes a substrate, a RFID sensing antenna, and a protective layer covering the RFID sensing antenna. The RFID sensing antenna contains a conductive sensing ink / glue made of conductive ink / glue and multiple sensing materials. The multiple sensing materials can be oxides-based semiconductor materials, other-based semiconductor materials, chemically or photosensitive materials, thermal-sensitive materials, force-sensitive materials, or magnetic-sensitive materials. The conductor of the conductive sensing ink / glue can be any one of metal, carbon, conductive polymers, or mixture of them. The RFID sensing antenna has a main part and a frequency modulation part, and multiple sensing materials of the frequency modulation part can be any one of metal, carbon, polymer, organic modifiers, or mixture of them.

Problems solved by technology

A long-distance RFID sensor is configured to sense explosive, yet the high-frequency RFID sensor cannot be used to sense targets in a long distance.
However, the RFID tag cannot senses multiple targets of various physical or chemical properties.

Method used

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Examples

Experimental program
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Effect test

first embodiment

[0028]With reference to FIGS. 3 and 4, a printed RFID sensor tag according to the present invention comprises: a substrate 10, a RFID sensor 20 arranged on a top of the substrate 10, and a protective layer 30 covering the RFID sensor 20.

[0029]The RFID sensor 20 includes a RFID sensing antenna 21 and a chip 22 adhered on the RFID sensing antenna 21, wherein the RFID sensing antenna 21 is partially or totally made of conductive sensing ink / glue printed on the top of the substrate 10, and the conductive sensing ink / glue is dried, solidified, and pressed after printing the conductive sensing ink / glue on the top of the substrate 10.

[0030]The conductive sensing ink / glue consists of conductive ink / glue and multiple sensing materials, wherein the multiple sensing materials are any one of chemically sensitive materials, photosensitive materials, thermal-sensitive materials, force-sensitive materials, and magnetic-sensitive materials. The conductive ink / glue is any one of conductive metal glu...

second embodiment

[0036]In a second embodiment, as shown in FIG. 5, the RFID sensing antenna 21 includes a main part 21A and a frequency modulation part 21B, wherein the main part 21A is electrically connected with the frequency modulation part 21B and is made of conductive ink / glue, and the frequency modulation part 21B is made of conductive sensing ink / glue consisting of multiple sensing materials, wherein the multiple sensing materials of the conductive sensing ink / glue are chemically sensitive materials, photosensitive materials, thermal-sensitive materials, force-sensitive materials, and magnetic-sensitive materials. Furthermore, the multiple sensing materials of the conductive sensing ink / glue are any one of oxides-based semiconductor materials or other-based semiconductor materials. Alternatively, the multiple sensing materials of the conductive sensing ink / glue are any one of metal, carbon, polymer, organic modifiers, and mixture of the metal, the carbon, the polymer, and the organic modifier...

third embodiment

[0038]In a third embodiment, as illustrated in FIG. 6, the RFID sensing antenna 21 includes a first part 23, a second part 24, and a sensing part 25, wherein a first distal segment 231 of the first part 23 separates from a second distal segment 241 of the second part 24 so as to produce an open circuit between the first distal segment 231 of the first part 23 and the second distal segment 241 of the second part 24, wherein a chip 22 adheres on a connection portion of the first part 23 and the second part 24, the sensing part 25 is coupled with the first segment 231 of the first part 23 and the second segment 241 of the second part 24. The first part 23 and the second part 24 are made of conductive ink / glue, and the sensing part 25 are made of conductive sensing ink / glue consisting of multiple sensing materials, wherein the sensing part 25 is a normal open circuit and changes to a closed circuit after being influenced by multiple sensed targets.

[0039]The multiple sensing materials of...

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PUM

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Abstract

A printed RFID sensor tag contains: a substrate, a RFID sensor arranged on a top of the substrate, and a protective layer covering the RFID sensor. The RFID sensor includes a RFID sensing antenna and a chip adhered on the RFID sensing antenna. The RFID sensing antenna is partially or totally made of conductive sensing ink / glue printed on the top of the substrate, and the conductive sensing ink / glue consists of conductive ink / glue and multiple sensing materials.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a printed RFID sensor tag which contains multiple sensing materials capable of sensing multiple sensed targets of various physical or chemical properties.BACKGROUND OF THE INVENTION[0002]With reference to FIG. 1, low-frequency radio frequency identification (RFID) system (125-134 kHz) and a high-frequency radio frequency identification (RFID) system (13.56 MHz) transmit signals within a distance of several cm to 1 M. A transmission range of UHF radio frequency identification (RFID) system (860-960 MHz) is up to 10 M. A transmission rage of microwave frequency band RFID system (2.4 GHz) is up to 30M. Thus, the UHF radio frequency identification (RFID) system and the microwave frequency band RFID system are applied to sense sensed targets in a long distance.[0003]Referring to FIG. 2, methods and systems for integrated interrogation of RFID sensors are disclosed in U.S. Pat. No. 8,717,146. To sense targets accurately, multipl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06K19/077G06K19/07H05K3/12H01Q1/22
CPCG06K19/0776G06K19/07773G06K19/0717H05K3/12H01Q1/2208G06K19/07775H04Q2209/47H04Q9/00H01Q1/2225H01Q9/065H05K1/092H05K1/16H05K2201/10098G06K19/07786
Inventor LAI, CHUNG-PINGCHANG, KUO-HSIN
Owner BGT MATERIALS