Building intercom system with resident cellphone used for intercommunicating with visitors and opening gate at stairs

Abstract

The invention relates to a building intercom system with a resident cellphone used for intercommunicating with visitors and opening a gate at the stairs, which is applied to conversation and communication between visitors and a building resident at the stairs and opening of a gate at the stairs after the resident communication. The building intercom system with a resident cellphone used for intercommunicating with visitors and opening the gate at the stairs comprises an intercom at the stairs, an electrically controlled lock and an automatic door closer, wherein the electrically controlled lock is provided with a relay control line. The building intercom system is characterized in that the system further comprises a resident cellphone, and the intercom at the stairs comprises a wireless mobile communication module, a CPU (central processing unit) single chip microcomputer and a DTMF (dual-tone multifrequency) decoding chip. The wireless communication module is connected with an output end of a microphone audio signal input line and an input end of a loudspeaker audio signal output line respectively through an audio input interface and an audio output interface, the DTMF decoding chip is connected with the CPU single chip microcomputer through a CPU single chip microcomputer interface, and the electrically controlled lock is controlled by the CPU single chip microcomputer through the relay control line. The building intercom system with the resident cellphone used for intercommunicating with visitors and opening the gate at the stairs has the advantages that functions of existing user cellphones are expanded, maintenance of intercoms is facilitated, production of indoor-specific extensions for building users is omitted, cost is saved, and the like.

Description

technical field [0001] The invention relates to a building intercom system that uses a mobile phone of a resident to communicate with a visitor and open a stairway door. Background technique [0002] In order to strengthen the safety management of the residents of the whole building, a door is set up at the first floor (ground) stairway to control the entry of visitors without the consent of the residents. In order to facilitate the indoor residents of the floor to communicate with the visitors in front of the stairway door and open the stairway door after the call is over, people have installed a stairway intercom next to the stairway door leaf. [0003] The current building intercom system uses the mains as the DC power supply, including electric locks and automatic door closers; and includes digital key lines, rectification and filtering lines for converting AC power to DC power, microphone audio signal input lines, The stairway walkie-talkie composed of speaker audio si...

AI Technical Summary

Problems solved by technology

Its disadvantage is that it needs to pre-buried and erect dedicated wired lines between the intercom at the stairway and the residents, which requires heavy workload and high cost, and it is difficult to coordinate with the progress of civil engineering.

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