Solar LED light-operated access control voice broadcasting apparatus

Abstract

Disclosed in the invention is a solar LED light-operated access control voice broadcasting apparatus comprising a visible light transmission link, a main controller, an audio encoder and decoder, and an audio input and output terminal. The visible light transmission link consists of an LED driving circuit, an LED lamp, a lens, a PD light sensitive tube and a light receiving circuit. The main controller being a single-chip microcomputer is used for controlling the audio encoder and decoder to carry out voice data collection and compressed coding and sending the collected data to the LED driving circuit by a serial port; the LED driving circuit sends an on / off signal according to an instruction; the light receiving circuit controls the PD light sensitive tube and conveying the signal to the main controller; and the main controller sends the received data to the audio encoder and decoder to carry out decoding outputting. According to the invention, the complexity and cost are low; the communication distance is long; functions of illumination and real-time voice intercom can be realized; and other data besides the voice can be transmitted.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a voice broadcast device for solar LED light-controlled access control. Background technique [0002] Solar energy (solar energy) refers to the sun's heat radiation energy (see the three ways of heat energy transmission), the main performance is often said that the sun's rays. In modern times, it is generally used to generate electricity or provide energy for water heaters. Since the birth of life on earth, it has mainly survived on the heat radiation energy provided by the sun. Since ancient times, humans have also used the sun to dry objects and use it as a method of making food, such as making salt and drying salted fish. With fossil fuels decreasing day by day, solar energy has become an important part of the energy used by human beings and has been continuously developed. There are two ways to use solar energy: photothermal conversion and photoelectric conver...

AI Technical Summary

Problems solved by technology

[0006] Existing access control systems generally use wired signal transmission, which requires pre-set signal transmission lines. The installation is complicated and costly. The existing optical communication system is very complex, and the communication distance is only a few × 10cm. The problem of synthesizing white light with multi-color LEDs is not practical

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