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Created on 02.10

CT235HD Intelligent Dual-Spectrum Acoustic Early Warning System Comprehensive Application Plan

CT235HD Intelligent Dual-Spectrum Acoustic Early Warning System Comprehensive Application Plan

——Building an "Intelligent Closed-Loop" Public Security Paradigm

Surveillance camera on metal pole with hills in the background.

Executive Summary

The CT235HD Intelligent Dual-Spectrum Acoustic Early Warning System is China’s first integrated security solution combining dual-spectrum sensing and directional acoustic deterrence technology. Launched at the China Emergency Expo in November 2024, the system breaks traditional single-sensor limitations by enabling a closed-loop workflow of "Monitoring-Identification-Alert-Command", effectively addressing the "last-mile" challenge in forest fire prevention, perimeter security, and emergency broadcasting. This document systematically outlines its technical architecture, application scenarios, implementation pathways, and societal value, providing a replicable, scalable practical blueprint for public security system construction.

1. System Overview: Technological Innovation Redefining Industry Standards

Developed by CTRLPA, the CT235HD integrates a 4MP visible light camera, a 100 mm focal length thermal imager, and a 147 dB directional sound amplifier with edge AI algorithms and a PTZ pan-tilt system, forming a "visual + thermal + acoustic" triple-sensing matrix.
✅ Key Breakthroughs:
  • Dual-Mode Verification<5%
  • Acoustic Integration
  • Smart Closed-Loop < 3 seconds
“This system deeply integrates fire detection with on-site acoustic warnings, meeting the core requirements of ‘effective prevention and timely suppression’ in forest fire control.”— China Emergency Expo Technical Review (2024)

2. Three Core Application Scenarios

Scenario 1: Forest Fire Prevention – The "Electronic Sentinel" for Green Ecology

Deployment Architecture
Four-Level Early Warning Workflow
Alert Level
Trigger Condition
System Action
Value Demonstration
Monitoring
Continuous scanning
24/7 AI analysis of smoke/thermal features
Replaces 80% manual patrols
Level 1
Suspected fire (single-mode verification)
PTZ auto-tracking + 10s video evidence
Golden time for judgment
Level 2
Confirmed fire (dual-mode verification)
Directional acoustic broadcast: "Fire ahead! Evacuate immediately!"
Prevents personnel entry risk
Level 3
Fire escalation
Push coordinates/video/thermal maps to command center + fire department collaboration
Response time reduced to 3 minutes
Field Performance (Liangshan, Sichuan & Pu’er, Yunnan Pilots)
  • 🔥 Fire Detection Time: 30–60 minutes → 2.1 minutes
  • 🌲 Coverage Area: 28.3 km² per device
  • 📉 False Alarm Rate: 4.7%
  • 📢 Acoustic Effectiveness: Clear voice at 1000 m distance

Scenario 2: Energy Facility Perimeter Security – Non-Lethal Intelligent Defense

Tiered Response Strategy
Threat Level
Recognition Logic
Acoustic Strategy
Human-Centric Design
Low Risk
Thermal imaging detects movement (>300m)
Voice prompt: "You are in a monitored area. Please identify yourself"
Calm tone, avoids panic
Medium Risk
Visible light confirms proximity to fence (<100m)
Warning broadcast: "Warning! Restricted area. Leave immediately"
Repeats 3 times, allows evacuation
High Risk
Confirmed fence climbing
147 dB directional deterrence +联动报警 + full recording
Auto-avoids strong sound within 50m human proximity
Value Demonstration
  • 🛡️ Deterrence Success Rate: 89%
  • 👥 Labor Savings: Patrol frequency reduced by 70%
  • 📜 Judicial Compliance: 100% event audio/video evidence, meeting Occupational Safety and Health Law

Scenario 3: Community/Campus Emergency Broadcasting – "Dual-Use" Civil Safety Guardian

Guangdong "Ten Have" Safety Project Implementation
  • Deployment Scale: 986 communities, 1,123 primary/secondary schools
  • Core Devices
  • Multi-Hazard Response Template Library
Societal Benefits
  • ⏱️ Emergency Response Time: ≤3 minutes
  • 👥 2023 Typhoon Season: 102,000 evacuations
  • 📈 Resident Safety Satisfaction Increased by 40%

3. Technical Excellence: Specifications as Commitments

Key Performance Parameters

Module
Core Parameters
Industry Benchmark Advantages
Dual-Spectrum Sensing
• Visible Light: 4MP/37× optical zoom
• Thermal: 100mm/4166m detection
• AI Recognition: Flame/Smoke/Intrusion tri-mode
Recognition confidence >90%, lowest false alarm rate
Acoustic System
• SPL: 147 dB@1m (CNAS-certified)
• Beamwidth: 5° precise direction
• Speech Intelligibility: STI≥0.65@500m
58% higher acoustic efficiency, reduced environmental interference
Environmental Adaptation
• Operating Temp: -40℃~+70℃
• Protection: IP56 (unit)/IP67 (PTZ)
• Wind Resistance: Level 12 (32.7m/s)
Stable in extreme cold/humid/dusty conditions
Smart Maintenance
• Edge Computing: Ascend 310 NPU (4TOPS)
• Communication Backup: 5G+Beidou dual-mode
• Battery Life: Solar + 72-hour battery
Works without network in extreme scenarios
Note: All parameters certified by China National Institute of Metrology (CNAS L1234) and Ministry of Emergency Management Fire Research Institute (XFJY-2024-CT235HD)

4. Implementation Guidelines: Full-Cycle Management from Deployment to Maintenance

Four-Step Deployment Framework

  1. Scientific Site Selection
  1. Modular Installation
  1. Platform Integration
  1. Long-Term Maintenance

Compliance Red Lines

⚠️ Strictly follow Article 43 of the Noise Pollution Prevention Law:
  • Auto-restrict distance when SPL >120 dB (≥50 m)
  • Human proximity sensor shutdown (millimeter-wave radar assisted)
  • Usage requires prior approval from public security/emergency departments

5. Value Enhancement: Beyond Technology, Embracing Responsibility

Dimension
Quantified Value
Societal Impact
Economic
• Reduce fire losses by >70%
• Cut maintenance costs by 60%
Enhance national emergency investment efficiency
Life Safety
• Golden 10 minutes for evacuation
• Reduce casualties by >50%
Practice "People First, Life First" philosophy
Ecological Barrier
• Intercept 200+ initial fires annually
• Protect >100,000 hectares of forest
Support "Dual Carbon" strategy implementation
Standard Leadership
• Lead "Portable Emergency Directional Sound Systems"
• Listed in MIIT 2024 Safety Equipment Promotion Catalog
Drive domestic high-end security equipment rise

6. Certifications & Industry Recognition

  • ✅ National Certification
  • ✅ Industry Recommendation Forest Fire Prevention Equipment Catalog (2024 Edition)
  • ✅ Expert Endorsement
“CTRLPA acoustic products demonstrate robust technical support and industrialization capabilities for safety and emergency applications. Recommend nationwide promotion in key fire-prone areas.”— China Emergency Expo National Expert Review Panel
  • ✅ Honor Listing2024 Safety Equipment Application Promotion Case Catalog

Conclusion: Technology for Good, Safeguarding Communities

CT235HD is not just a technological breakthrough but a vivid practice of "technology empowering safety." It transforms forest fire prevention from "human defense" to "smart defense," shifts community emergency response from "reactive" to "proactive," and turns sound waves into warm forces protecting lives.
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