Ultrahigh-frequency RFID reader-writer

Abstract

The invention discloses an ultrahigh-frequency RFID reader-writer which comprises a radio frequency module, an ultrasonic sensor, a storage unit, a processor, a power module and a radio frequency module power source. The radio frequency module is used for receiving and sending signals and the power is adjustable; the ultrasonic sensor is used for detecting the distance between the radio frequency module and an ultrahigh-frequency RFID label object; the storage unit is used for storing the distance, detected by the ultrasonic sensor, between the radio frequency module and the ultrahigh-frequency RFID label object; the processor is used for controlling the storage unit to store the detected distance and controlling the radio frequency module to adjust the radio frequency power and is respectively connected with the storage unit and the radio frequency module; the power module is used for supplying power to the ultrasonic sensor and the processor; the radio frequency module power source is used for supplying power to the radio frequency module. The ultrahigh-frequency RFID reader-writer can dynamically adjust the radiation power of a radio frequency power amplifier, the power of a system can be optimized, the electric power can be reasonably saved, and the probability of interference between adjacent reader-writers can be reduced.

Description

technical field [0001] The present invention relates to the technical field of radio frequency identification (Radio Frequency Identification, RFID), in particular to an ultra-high frequency RFID reader-writer. Background technique [0002] Radio Frequency Identification (RFID) is a technology for automatic identification and data acquisition. It uses radio frequency to carry out non-contact two-way data communication to achieve the purpose of identifying targets. Compared with traditional identification methods, RFID technology can complete information input and processing without direct contact, optical visibility, or manual intervention. Moreover, the technology is easy to operate, and has been widely used in logistics, production, transportation, transportation, medical care, tracking, anti-counterfeiting, asset and equipment management and other application fields that require data collection and processing. Existing UHF RFID readers basically use high power consumptio...

AI Technical Summary

Problems solved by technology

[0003] In addition, in traditional UHF RFID systems, fixed power is usually used to read and write UHF RFID tags. In order to improve the accuracy of reading and writing RFID tags, the transmitting power of the reader is often much The power required by the tag, this method not only leads to the waste of electric energy, but also may increase the probability of interference between adjacent readers

Images