RFID range finding structure based on variable power, and method thereof
A power and radio frequency technology, applied in the field of radio frequency identification (RFID), can solve the problems that the reader is easily interfered with when receiving signals, the positioning accuracy is not high, the non-line-of-sight effect, etc., and achieves simple structure, strong anti-interference ability, and accurate high degree of effect
Inactive Publication Date: 2015-08-26
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology
The disadvantage is that the positioning accuracy is not high, and the reader is easily disturbed when receiving signals
Due to many obstacles, there is a very serious non-line-of-sight effect
Method used
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[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0026] refer to figure 1 with figure 2 Shown, a kind of radio frequency RFID ranging structure based on variable power, this structure comprises main module and slave module, described main module is by main MCU processor module, and the display module that connects main MCU processor module respectively, main RFID A module and an attenuator, wherein the main RFID module and the attenuator are provided with an antenna and connected in series through the antenna, and the attenuator and the main RFID module are connected in series to form a transmission signal attenuation link and a response signal receiving link;
[0027] The slave module is composed of interconnected slave RFID modules and slave MCU processor modules, the slave RFID module is provided with an antenna, and the slave MCU processor module and the slave RFID module for...
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The invention relates to an RFID range finding structure based on variable power, and a method thereof. The RFID range finding structure comprises a main module and a slave module. The main module is composed of a main MCU processor module, a display module, a main RFID module and an attenuator; wherein the display module, the main RFID module and the attenuator are connected with the main MCU processor module; wherein the main RFID module and the attenuator are provided with antennae and are serially connected through the antennae. The attenuator is serially connected with the main RFID module for forming a transmission signal attenuation link and a response signal receiving link. The slave module is composed of a slave RFID module and a slave MCU processor module which are connected with each other. The slave RFID module is provided with the antenna. The slave MCU processor module and the slave RFID module form a transmission signal receiving link and a response signal transmission link. According to the RFID range finding structure and the method, the power of the RFID signal power is changed by means of the attenuator, and the slave module can be in two states of being able to receive the signal of the main module and being unable to receive the signal of the main module, thereby settling a problem of detecting power value.
Description
technical field [0001] The invention belongs to the technical field of radio frequency identification (RFID), and in particular relates to a variable power-based radio frequency RFID ranging structure and method. Background technique [0002] GPS positioning technology can be said to be the most professional positioning system, which has remarkable features such as all-weather, high precision, and high efficiency. However, for indoor positioning, because GPS is greatly affected by buildings and has high cost and high power consumption, RFID positioning technology is mostly used for indoor positioning. RFID is an independent discipline that integrates different interdisciplinary professional technologies, such as high-frequency technology, microwave and antenna technology, electromagnetic compatibility technology, semiconductor technology, data and cryptography, manufacturing technology and application technology. This is one of the most promising information technologies in...
Claims
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IPC IPC(8): G06K17/00
Inventor 王军杨会玲陈伟袁新潮
Owner SUZHOU UNIV OF SCI & TECH