Design And Implementation Of Distributed Voice Information System Based On CAN BUS

With the rapid development of national economy and the broad application of computer technology, communication technology, audio & video technology, the intelligent building has been developed with high speed, in which the building automation system is the key factor to realize the target stated above. The fieldbus control system can handle the problem caused by the closed system with specific network communication in the distributed control system, which has realized the multi-function of integrative automation with converting the closed and specific based solving scheme to the open and standardized one. The fieldbus has a broad application foreground. Current intelligent building enters the intellectualization, humanness tendency, safe domain. Humanness is a major tendency that the current society develops. To speaks the system further development is the human nature consideration is easy to use, to facilitate and so on.The analysis of the current intelligent buildings in the basic functions of Access Control System, the study and design of the Intelligent Community of building automation systems, building automation system has the basic functions, research and design of intelligent buildings in a voice message system publishing functions.It included several modules:1st, Voice information dissemination system, the management of data and information issued by the bus design to the user's machine, and then the digital information to the voice messages.2nd, Round-raising voice in the design of the volume and improve the voice volume of information dissemination system, transmission of voice and voice amplification in the process of Whistle, research and analysis of the causes of the Whistle, the inhibition of the system voice Whistle Several design solutions, and the corresponding testing and choice.3rd, the plan of Intelligent Voice Information System for network is divided into upper-management machine, and the entrance of indoor unit. PC use and management of between Serial Bus connections, standard RS232 bus. And the management of the entrance machine, the connection between the user plane for the CAN bus. 4th, System hardware included such modules. PC interface and management of design, management of the hardware design, the design of the entrance of the border Security Design, users of the hardware design, but also a voice module design.The innovation of the system is that realize information of voice releases without adding more devices. The existing information system of buildings can publish text messages, but can not publish voice messages. The publish voice message of the system's function is China's first application, test the same products abroad and no similar function.The completion of the basic design features, while also taking into account the future development of intelligent buildings, and has good room for the expansion, it can provide door - and indoor-speaking voice, video image transmission, and also passed the test to achieve better results.