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Building visual intercom access control system

A door and building technology, applied in closed-circuit television systems, two-way working systems, etc., can solve the problems of high wiring costs, complex wiring, and large wiring engineering, and achieve low wiring costs, simple system wiring, and small wiring engineering Effect

Inactive Publication Date: 2015-05-06
CHINA SECURITY & FIRE IOT SENSING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The wiring of this utility model is complex, the amount of wiring engineering is large, and the wiring cost is high; and it can only realize one-to-one visual intercom

Method used

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  • Building visual intercom access control system
  • Building visual intercom access control system
  • Building visual intercom access control system

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Embodiment Construction

[0017] The structure and principle of the building video intercom access control system in the embodiment of the present invention are as follows: Figure 1 to Figure 4 As shown, it includes multiple indoor extensions and multiple outdoor stations. The indoor extensions and outdoor stations are connected through DC power lines; The video signal, voice signal and control signal with the outdoor station are transmitted through the DC power line.

[0018] Indoor extension includes main power supply, main control MCU, video signal decoder, voice modem, video display and control circuit, power supply converter, communication protocol converter, control keyboard, MIC and speaker. The communication protocol converter realizes the signal transmission between the extension and the door station, and between the extension and the extension, compiles and analyzes the content of the transmitted signal, and finally transmits the converted signal content to the main control MCU.

[0019] Th...

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Abstract

The invention discloses a building visual intercom access control system which includes a plurality of indoor extensions and at least one door phone, wherein the indoor extensions are connected with the door phone through a direct current power line and are connected onto the direct current power line in parallel. Video signals, voice signals and control signals between the indoor extensions and the door phone are transmitted through the direct current power line. Only two lines are needed to connect the indoor extensions and the door phone as well as the indoor extensions, and not any additional power line, video line or voice line is needed. In addition, the building visual intercom access control system is simple in circuit, small in wiring amount and low in wiring cost.

Description

[technical field] [0001] The invention relates to the field of safety protection, in particular to a building video intercom access control system. [Background technique] [0002] The building access control system can effectively prevent illegal personnel from entering the building. The utility model patent No. CN200620001011.2 discloses a building video intercom access control system. The outdoor station and indoor station used to transmit information between the outside and the inside, as well as the power supply installed inside the building for the power supply of the entire system, also includes the power supply arranged inside the building for connecting the outdoor station and each indoor station, transmitting The network cables for all the information between them; each segment of the network cables is connected with a joint. One twisted pair of the eight wires in the network cable is used to transmit video signals; the other twisted pair is used to transmit contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N7/14
Inventor 余文伟谢成炜颜聪
Owner CHINA SECURITY & FIRE IOT SENSING CO LTD