CN-121985319-A - Flexible wearable radio frequency identification sensor, preparation method and application

CN121985319ACN 121985319 ACN121985319 ACN 121985319ACN-121985319-A

Abstract

The embodiment of the invention provides a flexible wearable radio frequency identification sensor, a preparation method and application thereof, and relates to the technical field of functional materials. The sensor comprises a passive RFID chip, a flexible antenna and a conductive connecting piece for connecting the passive RFID chip and the flexible antenna, wherein the flexible antenna is made of fire detection/early warning materials, and the fire detection/early warning materials can generate electrical characteristic changes when the temperature reaches a preset response threshold value or burns, so that the flexible antenna is conducted and forms a resonant loop, and the passive RFID chip is activated to be read by an external reader-writer in a wireless mode to send out fire alarm signals. The flexible wearable radio frequency identification sensor provided by the invention has the advantages that the fire response type functional material and the passive RFID electronic tag technology are deeply fused, so that an intelligent fire alarm unit is constructed, a battery is not needed, remote and non-contact fire alarm can be realized, and the sensor is suitable for high-risk scenes such as firefighters, lithium battery monitoring, power equipment protection and the like.

Inventors

HU XILI
LIAO RUI
ZHOU HAOXUAN
TIAN MINGWEI

Assignees

青岛大学

Dates

Publication Date: 20260505
Application Date: 20260122

Claims (10)

1. The flexible wearable radio frequency identification sensor is characterized by comprising a passive RFID chip, a flexible antenna and a conductive connecting piece for connecting the passive RFID chip and the flexible antenna, wherein the flexible antenna is made of fire detection/early warning materials, and the fire detection/early warning materials can generate electrical characteristic changes when the temperature reaches a preset response threshold value or burns, so that the flexible antenna is conducted and forms a resonant loop, and the passive RFID chip is activated, so that the passive RFID chip can be read by an external reader-writer in a wireless mode to send out a fire alarm signal.
2. The flexible wearable radio frequency identification sensor of claim 1, wherein the fire detection/early warning material is one or more of a resistance responsive material, a thermoelectric responsive material, and a thermal resistance responsive material.
3. The flexible wearable radio frequency identification sensor of claim 2, wherein the resistance responsive material is selected from one or more of graphene oxide, zinc oxide, tin oxide.
4. The flexible wearable radio frequency identification sensor according to claim 2, wherein the thermoelectric response material is a composite system of a thermoelectric material and a metal nano material, wherein the thermoelectric material is one or more of silver selenide, silver telluride, bismuth telluride, polyaniline and poly-3, 4-ethylenedioxythiophene, the metal nano material is one or more of silver nanowires, carbon nanotubes, silver nanoparticles and graphene, and the polymer matrix is one or more of chitosan, sodium alginate, polyvinyl alcohol, polyurethane, polycaprolactone and carboxymethyl cellulose.
5. The flexible wearable radio frequency identification sensor of claim 2, wherein the thermally resistive responsive material is selected from one or more of the group consisting of ferroferric oxide, manganese dioxide, titanium dioxide, bismuth oxide, cobalt oxide.
6. The flexible wearable radio frequency identification sensor of claim 1, wherein the preset response threshold is 50-300 ℃.
7. The flexible wearable radio frequency identification sensor of claim 1, wherein the passive RFID chip and the flexible antenna outer surface are coated with an encapsulation layer.
8. The flexible wearable radio frequency identification sensor of claim 1, wherein the flexible wearable radio frequency identification sensor is in a fiber form, a fabric form, a two-dimensional planar film form, or a three-dimensional bulk form.
9. A method of manufacturing a flexible wearable radio frequency identification sensor according to any one of claims 1 to 7, wherein the flexible wearable radio frequency identification sensor is in a fibrous form or a two-dimensional planar film form; The preparation method comprises the steps of adhering the passive RFID chip to a fabric or a two-dimensional plane film substrate, forming the flexible antenna on the fabric or the two-dimensional plane film substrate in a printing, coating, printing, sewing and spinning mode, and connecting the passive RFID chip with the flexible antenna through a conductive connecting piece; and/or the flexible wearable radio frequency identification sensor in the form of fiber is further processed into textiles such as fabrics, clothes and the like through weaving, sewing and embroidery modes.
10. Use of a flexible wearable radio frequency identification sensor according to any one of claims 1-8 or obtained by the manufacturing method according to claim 9 for fire detection/early warning.

Description

Flexible wearable radio frequency identification sensor, preparation method and application Technical Field The invention relates to the technical field of functional materials, in particular to a flexible wearable radio frequency identification sensor, a preparation method and application. Background Frequent fire accidents seriously threaten the life and property safety of people. In a fire prevention and control system, early detection and early warning are key links for reducing casualties and losses. Meanwhile, during fire-fighting and rescue, firefighters are used as first-line combat power, and personal safety of firefighters is highly dependent on the reliability of protective equipment, particularly the integrity of firefighting protective clothing. Once the protective clothing is damaged or burned in a high-temperature or flame environment, the life of firefighters is directly endangered, and therefore, a technical means capable of monitoring the state of the protective clothing in real time and giving an alarm in time at a fire scene is needed. The mainstream fire detection technology at present mainly comprises an infrared flame detector, a smoke sensor, a resistance type temperature/gas sensitive sensor developed in recent years and the like. However, the technologies generally have two key bottlenecks, namely, one of the existing sensors and the matched alarm devices thereof are powered by an external power supply, and are difficult to meet the energy self-sustaining requirements in complex, mobile or long-time operation scenes, and the other of the existing sensors adopts rigid electronic elements and packaging structures, has large volume and poor flexibility, cannot be effectively integrated into a flexible wearable carrier (such as a fire protection suit), and limits the application of the existing sensors in individual protective equipment. Although Radio Frequency Identification (RFID) technology is widely applied to the fields of intelligent tags and Internet of things due to the advantages of being passive, wireless, light and thin, etc., the technology is combined with a fire response function, and wearable fire detection/early warning sensing is realized through a flexible electronic technology, and the technology is still blank. Therefore, developing a fire detection sensor that does not require external power, has good flexibility and wearability has become an urgent need to promote firefighter safety and promote intelligent protective equipment upgrade. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a flexible wearable radio frequency identification sensor, a preparation method and application. The technical scheme is as follows: The invention provides a flexible wearable radio frequency identification sensor, a preparation method and application thereof, comprising a passive RFID chip, a flexible antenna and a conductive connecting piece for connecting the passive RFID chip and the flexible antenna, wherein the flexible antenna is made of fire detection/early warning materials, and the fire detection/early warning materials can generate electrical characteristic change when the temperature reaches a preset response threshold value or burns, so that the flexible antenna is conducted and forms a resonant loop, thereby activating the passive RFID chip, and enabling the passive RFID chip to be read by an external reader-writer in a wireless way to send out fire alarm signals. Optionally, the fire detection/early warning material is one or more of a resistance responsive material, a thermoelectric responsive material, and a thermal resistance responsive material. Optionally, the resistance responsive material is selected from one or more of graphene oxide, zinc oxide, tin oxide. The thermoelectric response type material is a composite system of a thermoelectric material and a polymer matrix of a metal nano material, wherein the thermoelectric material is one or more selected from silver selenide, silver telluride, bismuth telluride, polyaniline and poly-3, 4-ethylenedioxythiophene, the metal nano material is one or more selected from silver nanowires, carbon nano tubes, silver nano particles and graphene, and the polymer matrix is one or more selected from chitosan, sodium alginate, polyvinyl alcohol, polyurethane, polycaprolactone and carboxymethyl cellulose. Optionally, the thermal resistance responsive material is selected from one or more of ferroferric oxide, manganese dioxide, titanium dioxide, bismuth oxide, cobalt oxide. Optionally, the preset response threshold is 50 ℃ to 300 ℃. Optionally, the passive RFID chip and the flexible antenna are coated with an encapsulation layer on the outer surfaces. Optionally, the flexible wearable radio frequency identification sensor is in a fiber form, a fabric form, a two-dimensional planar film form or a three-dimensional block form. The invention also provides a