Intelligent Access Control System Based on Acoustic Wave Communication

In this paper, the mode to convey information of the modulated signal of the project is analyzed from the waveform of the modulated signal of binary amplitude modulation. Then the feasibility of the decoding rule adopted by the project is analyzed by using the knowledge of the only decodable informa...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-08, Vol.1304 (1), p.12007
Main Authors: Jiang, Yubing, Shi, Huihong, Hu, Xiaoli, Du, Hongwei, Zhou, Liqin
Format: Article
Language:English
Subjects:
Access control
Acoustic waves
Amplitude modulation
Circuit design
Decoding
Information theory
Intervals
Physics
Signal processing
Sound waves
Waveforms
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Summary:In this paper, the mode to convey information of the modulated signal of the project is analyzed from the waveform of the modulated signal of binary amplitude modulation. Then the feasibility of the decoding rule adopted by the project is analyzed by using the knowledge of the only decodable information theory, which proves that as long as the intervals between the high level and between the codes are distinguished, it can be unlocked by transmitting the password information through the 10KHZ sound wave by counting the number of the intervals. Then, the acoustic wave signal receiving and processing circuit is designed. After going through the amplifying circuit, the filtering circuit and the shaping circuit, the sound wave signal can be converted into a door lock code to control the lock tongue drive module to unlock.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1304/1/012007