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17 April 2020 Design and implementation of LED voice communication system for crime prevention lighting
Haiyan Zheng, Nianyu Zou, Zhipeng Wang, Yingming Gao, Min Cheng
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Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 114556W (2020) https://doi.org/10.1117/12.2565302
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China
Abstract
With the development of the city, LED street lamps on urban roads gradually come into people's vision. This paper first investigates the lighting situation in some dark places on campus. On the premise of meeting the requirements of campus lighting at night, a new anti-crime method combining crime prevention lighting and optical communication is proposed. Through the transmission of voice signals, pedestrians are reminded to enhance safety and reduce the probability of dangerous events. To solve the question of visible light sound communication based on white LEDs,a 9W white LEDcommunication system is designed which can realize 300~8000Hz sound signal transmission.Firstly,the paper gives the overall design scheme based on UART according to the requirements. Secondly, the hardware equipment is made.Finally,the program of MCU is designed.Tseting and practical application show that the communication distance is 30cm,the baud rate is 227kb/s,the sound power is 0.7w,the system reaches the design requirements
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Haiyan Zheng, Nianyu Zou, Zhipeng Wang, Yingming Gao, and Min Cheng "Design and implementation of LED voice communication system for crime prevention lighting", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 114556W (17 April 2020); https://doi.org/10.1117/12.2565302
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KEYWORDS
Light emitting diodes
Analog electronics
Light sources and illumination
LED lighting
Visible radiation
Receivers
Transmitters
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