Distributor Relay Logic for Apartment Doorphone Wiring Flexibility
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Solution Overview
Problem
Existing doorphone systems for apartment houses do not fully utilize existing wiring, leading to inefficient device arrangements and limited flexibility in selecting optimal device configurations based on wiring states.
Innovation Solution
A doorphone system that combines daisy chain and star-type wiring, utilizing a distributor with a relay unit and controller to match key numbers from a lobby interphone to room monitors, allowing for optimal device arrangement according to existing wiring configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a distributor is connected to one monitor using existing two-wire cable wiring, then installation is simple and cost-effective, but the wiring cannot be fully utilized and device arrangement flexibility is limited
Solution Approach 1:
The distributor incorporates a relay unit that can dynamically switch connection states between multiple monitors based on received signals, transforming a static wiring configuration into a dynamic one that adapts to different communication needs while utilizing the same physical infrastructure
Solution Approach 2:
The system changes the operational state parameter of the distributor from a fixed single-monitor connection to a controllable multi-monitor connection state, allowing the same physical wiring to serve different device arrangements by changing connection states rather than physical configuration
2Adaptability or versatility
If distributors are connected in daisy chain type with star-type wiring to multiple monitors, then device arrangement flexibility is improved, but wiring complexity increases
Solution Approach 1:
The distributor internally segments multiple two-wire cable connections through separate relay circuits, allowing each monitor to be independently controlled while sharing the same physical wiring infrastructure, thus achieving star-type wiring functionality without proportionally increasing wiring complexity
Solution Approach 2:
The relay unit acts as an intermediary between the single incoming two-wire cable and multiple monitors, enabling the distributor to create multiple logical connections from a single physical connection point, thereby simplifying the overall wiring structure while maintaining flexibility
Data Source
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AI summary
In a doorphone system for an apartment house, it is possible to select optimum equipment arrangement according to the state of existing wiring. In the case of receiving a signal indicating a key number from an incoming AM signal identifier, a state controller determines whether or not the key number matches any one of the key numbers of room monitors stored in a connection destination storage. In a case where the key numbers match, the state controller determines that the room monitor of a communicating counterpart is connected to the own device, switches a connection destination of a first relay to a third relay side, connects the second relay, connects the third relay to the terminal corresponding to the matched key number, and opens a communication path between the room monitor of the communicating counterpart and a lobby interphone.