The fire broadcast system is an important facility used for evacuation guidance and information dissemination in emergencies such as fires. Its core functions and implementation key points are as follows:
I. System Definition and Composition
Definition
The fire broadcast system transmits fire alarms, evacuation instructions, and safety information to people through amplification equipment. It is a core component of the building fire protection facilities.
Core Components
Broadcast Host: Controls signal processing and playback, supporting manual/automatic switching.
Speakers and Amplifiers: The coverage area should ensure clear sound. The power should be selected as required (e.g., 150W - 500W).
Sensors and Detectors: Trigger alarm signals and link the broadcast system.
Control Module: Links with the fire alarm system to achieve zoned broadcasting.
II. System Functional Features
Emergency Broadcasting
Automatically switches to broadcasting mode in case of a fire, issues an alarm within 10 seconds, and supports cyclic playback of evacuation instructions.
Zoned Control
Independently controls the broadcast content according to floors/areas to avoid information confusion.
Multi-scenario Adaptation
Supports seamless switching between background music and emergency broadcasting, and is compatible with network audio, USB/SD card input.
Intelligent Linkage
Links with the fire alarm and access control systems, triggering audible and visual alarms and linking the monitoring screen.
III. System Architecture Design
Networked Architecture
Adopts IP network transmission, supporting a three-level networking of the head control center - sub-control centers - terminals, covering complex scenarios such as large supermarkets and scenic spots.
Wiring Specifications
Use twisted-pair cables or flame-retardant cables to ensure stable signals and comply with fire electrical safety standards.
Equipment Selection
Host Selection: Select a host that supports multi-channel output (such as Hikvision's integrated broadcasting machine).
Speaker Layout: The spacing in corridors should be ≤ 25 meters. Waterproof sound columns should be used outdoors.
IV. Implementation and Maintenance
Construction Key Points
Equipment Installation: When installing speakers, consider the sound field coverage to avoid obstruction.
Testing and Acceptance: Simulate a fire alarm to verify the broadcast response time and sound quality.
Daily Maintenance
Check the equipment status monthly, clean the speaker dust, and regularly update the broadcast content.
Organize fire drills quarterly to test the system's linkage function.
V. Technical Trends
Intelligent Upgrading
Integrates AI voice synthesis to automatically generate multi-language evacuation instructions.
Remote Management
Remotely controls the broadcast content and volume through a cloud platform, and supports remote fault diagnosis.
High Reliability Design
Uses industrial-grade equipment (such as sound columns with an IP65 protection rating) to adapt to complex outdoor environments.
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