UHFRFID (Ultra High Frequency Radio Frequency Identification Device) self-adaptation working method
A working method and self-adaptive technology, applied in the direction of induction record carrier, instrument, computer parts, etc., can solve the problems of high transmission power, large electromagnetic wave radiation, increased power consumption, etc., to reduce power consumption, improve read and write efficiency, The effect of reducing radio frequency interference
Active Publication Date: 2015-01-28
GUOGUANG ELECTRONICS INFORMATION TECH
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However, the transmission power is too large, which increases power consumption on the one hand, and causes relatively large electromagnetic wave radiation to the surrounding environment on the other hand.
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[0042] The present invention proposes three kinds of self-learning processes, which can make the reader play a good use effect in use.
[0043] The invention is an RFID reader-writer-related self-learning mechanism based on the AS3992 chip. The following explains the main points of the three self-learning mechanisms: including the three processes of multi-antenna automatic switching and retention self-learning, frequency hopping point selection self-learning and power adjustment self-learning.
[0044] (A) Multi-antenna automatic switching and time retention self-learning mechanism include the following points:
[0045] 11) The minimum unit of antenna residence time is X milliseconds, that is, the shortest time of an inspection cycle; the time for switching all antennas for inspection is taken as a switching cycle;
[0046] 12) The residence time of each active antenna (during the residence time, the antenna conducts interrogation work) includes at least N time slots and at m...
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The invention discloses a UHFRFID (Ultra High Frequency Radio Frequency Identification Device) self-adaptation working method which includes three self-learning processes: counting the tag number read by a reader at each frequency point and corresponding RSSI (Received Signal Strength Indicator) values by placing UHFRFID tag test boards in specific areas read by antennas, screening the frequency points in a frequency hopping range, selecting several optimum reading frequency points to serve frequency hopping points, and accordingly improving the reading efficiency; conducting adjustment testing on examined transmitting power by placing the UHFRFID tag test boards in specific areas read by the antennas to obtain the minimum transmitting power which meets the examination requirement. The UHFRFID self-adaptation working method can effectively solve the problems of application environment changes of the fixed UHFRFID reader and complex parameter setting, and makes the fixed UHFRFID reader to have a good use effect.
Description
technical field [0001] The invention proposes an adaptive working method based on an AS3992 fixed UHF RFID reader, which belongs to the technical field of microwave radio frequency identification of the Internet of Things. Background technique [0002] With the development of the Internet of Things industry, UHF RFID technology has been rapidly promoted due to its characteristics of long recognition distance, high recognition accuracy, fast recognition speed, and strong anti-interference ability, gradually forming a new management means. Since the application environment of the fixed UHF RFID reader is changeable and the parameter settings are complicated, it brings a lot of inconvenience to the operator, so it is necessary for the reader to be able to automatically set according to the application environment to achieve the best use effect. [0003] Fixed UHF RFID readers generally have multiple antennas (that is, multi-channel). For the use of multiple antennas, most of t...
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Inventor 康志刚丁勇潘惠彬徐向明胡亮费凯沙卓烜
Owner GUOGUANG ELECTRONICS INFORMATION TECH