Distributed real-time control building intercom system

Abstract

The invention discloses a distributed real-time control building intercom system, which comprises a main network and a sub-network. Each intelligent node of a controller area network (CAN) bus in the system is configured with the sub-network inside a building; the sub-network adopts a recommended standard 485 (RS-485) bus for networking; the intelligent node of the CAN bus is used for data exchange between the sub-network inside the building and the main network of the CAN bus outside the building and for switching between audio and video channels simultaneously; the intelligent node of the CAN bus adopts a microprocessor, namely a digital signal processor (DSP), into which an enhanced controller area network (ECAN) module is embedded; the ECAN module receives and sends information based on a mailbox; and each message can be configured for sending or receiving the mailbox. Based on a grading distributed control principle, the distributed real-time control building intercom system combines the high speed of the DSP with the high reliability, real time and maintainability of CAN bus communication effectively, so that the system is reliable in operation and good in anti-interference performance and can meet requirements of engineering application completely.

Description

technical field [0001] The invention relates to an intercom system in the technical field of intelligent communities, in particular to a building intercom system with distributed real-time control. Background technique [0002] In recent years, due to the development of network technology, building intelligence has quietly emerged in the user areas of various instruments and meters. The original intelligent community was divided by function, including building intercom, monitoring and monitoring, perimeter defense, etc., and each system was relatively independent. There are only simple zone alarms in the room. When the system has better networking technology, the alarm can only be reported to the management center, and real remote monitoring cannot be realized. With the gradual approach to the world's security field, our concept of community intelligence has gradually become clear. A real smart community should be a community that can realize home intelligence, internal se...

AI Technical Summary

Problems solved by technology

"Although this patented technology proposes a video switcher based on CAN bus, it has not yet met the needs of engineering applications such as high reliability, real-time performance and maintainability.

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