TDMA Audio Annunciator Wiring for Scalable Security Zones
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Solution Overview
Problem
Existing security systems for large areas are costly and inefficient due to the complexity of setting up and maintaining large numbers of sensors and audio warning devices, particularly in terms of wiring and power supply, which limits their effectiveness and scalability.
Innovation Solution
A wired communication system using a time division multiple access (TDMA) protocol over a pair of electrical conductors for power and data transmission, with self-amplified speakers and redundant power sources, and optional wireless extensions for increased capacity and redundancy, allowing for efficient and scalable audio warnings and threat detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large numbers of sensors and audio warning devices are deployed to cover large areas, then threat detection coverage is improved, but system cost and complexity increase
Solution Approach 1:
The system segments the large secured area into multiple zones, each with its own control panel. This allows the system to cover large areas by dividing it into manageable segments, reducing the complexity of managing a single large system while maintaining comprehensive threat detection coverage across all zones.
Solution Approach 2:
The control panels are designed with multi-functionality, serving as both security control centers and public address systems. This universal design reduces the need for separate audio warning devices, thereby reducing system complexity and cost while maintaining reliable threat detection and warning capabilities across the entire secured area.
2Reliability
If more audio warning devices are installed to cover large areas, then emergency notification effectiveness is improved, but wiring and power supply complexity increase
Solution Approach 1:
The system merges the audio warning devices with the existing control panel infrastructure. By combining the public address functionality with the security control panels, the system eliminates the need for separate audio device wiring and power supplies, thereby reducing wiring complexity while maintaining effective emergency notification coverage across large areas.
Solution Approach 2:
The control panels are designed to serve dual purposes: security monitoring/control and emergency public address functions. This multi-functionality allows the system to provide effective emergency notification without requiring additional dedicated audio warning infrastructure, thus reducing wiring and power supply complexity.
3Reliability
If traditional security systems are used for large areas, then threat detection capability is maintained, but cost and scalability are worsened
Solution Approach 1:
The system uses a modular segmented architecture where the secured area is divided into zones with individual control panels. This segmentation enables scalable deployment - new zones can be added independently to cover expanding areas while maintaining the same proven threat detection capability, thereby improving scalability without compromising detection reliability.
Solution Approach 2:
The system transitions from a centralized monolithic architecture to a distributed multi-dimensional network of control panels and sensors. This dimensional change allows the system to scale horizontally by adding more control panels and zones, enabling cost-effective expansion to cover large and growing secured areas while maintaining consistent threat detection capability throughout.
Data Source
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AI summary
An apparatus including a security system (10) that protects a secured geographic area, an audio annunciator (16; ...; 18) of the security system, a pair of conductors (34, 36) that connects the annunciator to a control panel (18) of the security system wherein the pair of conductors supply power to the annunciator and a transceiver of the annunciator that exchanges messages with the control panel under a time division multiple access (TDMA) format through the pair of conductors and wherein the annunciator receives streaming audio messages from the control panel through the pair of conductors.