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Wearable passive RFID equipment base on radio frequency energy collecting device

A technology of energy harvesting and wireless radio frequency, applied in the field of radio frequency electronics, can solve the problems of short readable distance and limited application range of wearable passive RFID devices, and achieve the effect of increasing the readable distance and expanding the application range

Inactive Publication Date: 2017-08-04
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For wearable passive RFID devices, since the electronic tag is passive, it can only use the electromagnetic wave energy radiated by the reader to return the communication data to the reader with backscattering, resulting in a too short readable distance for wearable passive RFID devices. , the practical application range is limited

Method used

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  • Wearable passive RFID equipment base on radio frequency energy collecting device
  • Wearable passive RFID equipment base on radio frequency energy collecting device
  • Wearable passive RFID equipment base on radio frequency energy collecting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the current space where the wearable passive RFID device is located is covered with wireless radio frequency signals of GSM and 4G mobile communication of the mobile communication base station, and the energy harvesting antenna is a dual-frequency (900M and 1800M) fabric array antenna.

[0026] refer to figure 1 , a wearable passive RFID device based on radio frequency energy collection, including a substrate and an electronic tag attached to the substrate, the substrate is made of flexible nylon fabric, placed in the interlayer on the back of the clothes, and the substrate is covered with a waterproof film , which uses high molecular polyethylene film. Such as figure 2 As shown, the electronic tag includes an RFID communication antenna, an RFID chip circuit and an RFID chip, wherein the RFID communication antenna is used to receive and send wireless radio frequency communication signals; the RFID chip circuit is used to filter and modulate and dem...

Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that the current space where the wearable passive RFID device is located in this embodiment is covered by the wireless local area network WiFi signal of the wireless router, and the energy harvesting antenna used in this embodiment is dual-frequency (2.4G and 5.8 G) Fabric Array Antenna.

[0034] refer to Figure 5 , when the wearable passive RFID device is in a non-working state, it responds to the WiFi signal (2.4G and 5.8G) frequency band covered by the current space, and the energy harvesting circuit matches the impedance of the energy harvesting antenna, and the energy harvesting circuit is sensitive to the wireless radio frequency of mobile communication. The signal is rectified, filtered, stabilized, and finally stored in the energy storage element in the form of DC energy.

[0035] When the wearable passive RFID device is working, the reader corresponding to the wearable passive RFID device sends a read...

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Abstract

The invention relates to wearable passive RFID equipment based on a radio frequency energy collecting device so that the readable distance of the wearable passive RFID equipment can be increased. The equipment comprises a base body and an electronic tag attached to the base body, the periphery of the base body is covered by a waterproof film, the waterproof film employs a flexible insulating material, the electronic tag employs a passive type and comprises a RFID communication antenna, a RFID chip circuit and a RFID chip, the RFID communication antenna is used for receiving and sending radio frequency communication signals, the RFID chip circuit is used for performing filtering, modulation and demodulation on the RFID radio frequency communication signals and providing energy required by basic communication for the RFID chip, the RFID chip is used for responding to the received radio frequency communication signals, the electronic tag is connected with the energy collecting device, and the energy collecting device comprises an energy collection antenna, an energy collection circuit and an energy storage element connected in sequence.

Description

technical field [0001] The invention belongs to the technical field of radio frequency electronics, and relates to a wearable passive RFID device, in particular to a wearable passive RFID device based on a wireless radio frequency energy collection device, which can be used for access control, child prevention, elderly positioning in nursing homes, and sports competitions. and prison inmate management. Background technique [0002] At present, most wearable devices can be connected to mobile phones or other terminal devices. Wearable devices usually use the human body as a carrier to realize corresponding business functions through portable wear. According to the form of existence, it can be divided into five types: supported by the wrist, such as watches, rings and wristbands, supported by the head and neck, such as glasses, helmets, headgear, ties and headphones, etc., supported by the feet, such as shoes, Socks, anklets or other ankle accessories are supported by the wai...

Claims

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Application Information

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IPC IPC(8): G06K19/077G06K7/00
CPCG06K19/0772G06K7/0008
Inventor 岳鹏刘力崔宗敏杨祎楠卢姗姗吴乐
Owner XIDIAN UNIV
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