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With the development of optical communication technology, it's application was more and more extensive. Researchers had proposed a new type of optical communication technology, which connected the high-speed internet wire device to LED lighting device, LED as a signal generator was used for indoor wireless access to the local area network, using the light emitted by the LED as the carrier wave, the drive circuit modulated the network data to the visible light emitted by LED. LED was switched on and off at a frequency that the human eye couldn't perceive, and a light pulse signal carrying information was sent out, the light signal of LED was sent out with an electrical signal. After transmission through atmospheric channel, the receiving end converts the optical pulse signal into electrical pulse signal through diode and other photosensitive devices, and then the original transmission information of demodulation ended through circuit processing, so as to realize the function of communication. In this paper the design of a mail sorting vehicle system based on visible light control was introduced. The principle was this new type of optical communication technology. The mail sorting vehicle system controlled by LED visible light consists of four parts: visible light communication system, light-controlled mail car system, server and client. It could make the logistics sorting and handling system more intelligent and modern, for managers, enterprises, units to provided better decision-making and management basis. |
