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Positioning device using phased array principle and in combination with RSSI (Received Signal Strength Indicator) range measuring

A positioning device and phased array technology, applied to beacon systems, instruments, and inductive record carriers using radio waves, to achieve the effects of increasing radiation distance, reducing equipment complexity, and saving costs

Inactive Publication Date: 2012-06-27
TIANJIN UNIV
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Problems solved by technology

However, if this method wants to determine the two-dimensional coordinate position of the label, at least three readers are required

Method used

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  • Positioning device using phased array principle and in combination with RSSI (Received Signal Strength Indicator) range measuring
  • Positioning device using phased array principle and in combination with RSSI (Received Signal Strength Indicator) range measuring
  • Positioning device using phased array principle and in combination with RSSI (Received Signal Strength Indicator) range measuring

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Embodiment Construction

[0016] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0017] A positioning device utilizing the principle of phased array combined with RSSI ranging, the positioning device utilizing the principle of phased array combined with RSSI ranging includes a reader, a passive electronic tag corresponding to the reader and a group of array antennas, The reader includes a digital baseband circuit, a transmitting end and a receiving end.

[0018] Preferably, the transmitting end of the reader includes a digital-to-analog converter (DAC), an up-converter, a phase shifter, a power amplifier and an antenna.

[0019] Preferably, the receiving end of the reader includes an antenna, a low noise amplifier, a phase shifter, a down converter and an analog-to-digital converter (ADC).

[0020] Preferably, the model...

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Abstract

The invention discloses a positioning device using a phased array principle and in combination with RSSI (Received Signal Strength Indicator) range measuring, and relates to the technical field of ultrahigh radio frequency identification, in particular to the positioning device using the phased array principle and in combination with the RSSI range measuring. The positioning device using the phased array principle and in combination with the RSSI range measuring comprises a reader, a passive electronic tag and a group of array antennas, wherein the passive electronic tag corresponds to the reader; and the reader comprises a digital baseband circuit, a transmitting end and a receiving end. In the device, the direction angle of the reader and the tag to be positioned is mainly determined through a phased array antenna, the field strength value reflected by the tag read by the reader is then utilized to map the distance between the reader and the tag, and the position of the electronic tag can be obtained through operation of an algorithm. The device can be used for tracking and positioning a target at an open place or in an indoor environment. Since the phased array antenna is introduced, the radiation distance can be increased while the antenna gain is increased; meanwhile, the range of radiation is also expanded. The positioning device has the advantages of simple system and large positioning range.

Description

technical field [0001] The invention relates to the technical field of ultra-high frequency radio frequency identification, in particular to a positioning device using the principle of phased array combined with RSSI distance measurement. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology, which can carry out two-way data transmission to achieve the purpose of identification and positioning. The radio frequency identification technology working in the ultra-high frequency band can carry out long-distance and non-line-of-sight identification, and the identification process does not require manual operation, and the process is fast and convenient. Generally speaking, the identification distance of UHF radio frequency identification technology can reach more than tens of meters, and information of centimeter-level positioning accuracy can be obtained within a few milliseconds, and the transmission range is la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/08G06K7/00
Inventor 毛陆虹胡焙剑吴龙张世林谢生
Owner TIANJIN UNIV
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