An IoT RFID tag identification device

Abstract

An RFID tag identification device for the Internet of Things is composed of an active RFID card reader, an active RFID tag and a battery built into the active RFID tag. The active RFID card reader includes a split low-frequency Transmitting device and high-frequency receiving device, the first microprocessor of described active RFID card reader carries out Bi-phase encoding conversion to the command to be sent and transmits it to the low-frequency transmitting device, and the low-frequency triggering signal is continuously transmitted by the low-frequency transmitting device ;The high-frequency receiving device of the active RFID card reader can receive the confirmation response, and after Manchester code transformation, read the ID number and EEPROM data of the active tag, and send it to the network through the communication chip connected to the wired network; Active RFID The tag mainly includes a low-frequency receiving device that continuously transmits low-frequency trigger signals from the low-frequency transmitting device, and analyzes the command information of the low-frequency trigger signals; the second microprocessor of the active RFID tag collects and processes the encoded information of the low-frequency trigger signals; transmits a confirmation response The signal is sent to the high-frequency transmitting device, and the high-frequency transmitting device sends the confirmation signal after Manchester code conversion.

Description

technical field [0001] The invention relates to a low-frequency RFID sending and high-frequency (315MHz) receiving RFID tag identification device for the Internet of Things, which belongs to the technical field of the Internet of Things. Background technique [0002] The Internet of Things technology is mainly based on RFID technology. The RFID frequency band is divided into low frequency (100-125KHz), high frequency (13.56Mhz) and ultra-high frequency (800-900Mhz, 2.45GHz, 5.8GHz). RFID tags are divided into active tags and passive tags. Among them, the 13.56MHz high-frequency RFID passive tag has a short reading distance. The reading distance is 10-40cm when using a unilateral antenna, and 80-100cm when using a symmetrical bilateral antenna. The antenna height is about 150cm and takes up a lot of space. Suitable for label sensing at entrances and exits that occupy a certain space, not suitable for portable sensing devices. (For RFID tags, please refer to the utility pate...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a reasonable structural composition, convenient and reliable use, the communication of the tag itself is realized by a high-frequency transmitting device with extremely low power consumption, and the tag only receives low-frequency signals to make the distance Control, so as to solve the problem that low-frequency signal transmission requires large power consumption and cannot be driven by the battery on the label, and use this to accurately control the reading distance of the IoT RFID label identification device

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