Temperature sensing tag based on two-way rssi positioning

Abstract

The invention relates to the technical field of wireless radio frequency identification, and provides a temperature sensing label based on bidirectional RSSI positioning. The positioning function for detecting RSSI signal strength is added to a sensing label to be positioned, the sensing label which does not have a positioning function originally can also detect positioning signals, and therefore the positioning accuracy and anti-jamming capacity of an RFID system are largely improved. According to the technical scheme, the temperature sensing label based on bidirectional RSSI positioning is composed of an antenna, a radio frequency simulation front end, an RSSI detection circuit, a temperature sensing circuit and a digital baseband, wherein after the radio frequency simulation front end receives radio frequency signals sent by a reader, the radio frequency signals are demodulated into instruction data, are fed into the digital baseband, are processed and are responded, the corresponding instruction data fed back by the digital baseband are modulated and mixed by the radio frequency simulation front end, and 2.45GHz radio frequency signals are generated and are sent back to the reader by the antenna. The temperature sensing label based on bidirectional RSSI positioning is mainly applied to a wireless radio frequency identification occasion.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a device for realizing an active electronic tag with bidirectional RSSI positioning and temperature sensing functions. [0002] technical background [0003] As the country vigorously promotes the construction of "smart cities", it has become the development trend of information technology to realize comprehensive perception, ubiquitous interconnection, pervasive computing and integrated applications. This provides a broad application space for the development of emerging information technologies such as the Internet of Things, cloud computing, and mobile Internet. Since the Internet of Things realizes information exchange and communication between people and things, and between things and things through technologies such as intelligent perception, radio frequency identification (RFID) and pervasive computing, it is called the third development of the inform...

AI Technical Summary

Problems solved by technology

However, there are many uncertainties in the actual application environment, such as objects near the reader block the electromagnetic wave signal, the electromagnetic wave signal has multipath effects during propagation, and the signal attenuation degree of each path is different, etc.

These factors will affect the positioning accuracy of the RFID system, therefore, the positioning accuracy based on one-way RSSI is not high

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