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Created on 02.10

CT235HD Intelligent Dual-Spectrum Acoustic Deterrence and Early Warning System

CT235HD Intelligent Dual-Spectrum Acoustic Deterrence and Early Warning System

Intelligent dual-spectrum fire alarm system with AI detection, thermal imaging, and long-range alerts.
Technical Specifications Document

1. System Overview

The CT235HD is a cutting-edge dual-spectrum fire detection and acoustic deterrence system developed by CTRLPA. It integrates visible light imaging, thermal infrared sensing, and high-intensity directional acoustic technology to enable "detection-identification-warning-command" closed-loop management. Designed for forest fire prevention, perimeter security, and emergency broadcasting, it complies with GB/T 35273-2020, GA/T 1400, and IEC 62443 standards.

2. Technical Specifications

2.1 Physical and Environmental Parameters

Category
Parameter
Specification
Notes
Dimensions
L × W × H
800.5 mm × 278.5 mm × 544 mm
With protective housing
Weight
Net weight
42 kg
Aluminum alloy + engineering plastic
Protection Rating
IP56 (entire unit) / IP67 (PTZ sealed cavity)
-40°C ~ +70°C operating
Mounting
Installation
Spherical universal joint + M16 base bolt / Optional pole/tower adapter
Tilt adjustment ±15°
Operating Temp.
Standard version: -20°C ~ +60°C
Industrial enhanced version: -40°C ~ +70°C
Startup time ≤ 90 s @ -20°C
Storage Temp.
-40°C ~ +85°C (no condensation)
-

2.2 Dual-Spectrum Sensing Subsystem

2.2.1 Visible Light Camera

Parameter
Specification
Notes
Resolution
2592 × 1520 (4MP)
H.265/H.264/MJPEG output
Optical Zoom
37× (f=6.5mm ~ 240.5mm)
1080P@30fps lossless zoom
Digital Zoom
16×
Electronic stabilization (EIS)
Minimum Illumination
0.001 lux (color, F1.6)
0.0001 lux (B/W, IR on)
IR LED range: 150 m
Field of View (FOV)
Horizontal: 5.7° ~ 208°
Auto distortion correction
Image Enhancement
WDR 120 dB, 3D noise reduction, glare suppression
ROI encoding optimization

2.2.2 Thermal Imager

Parameter
Specification
Notes
Detector Type
Uncooled VOx microbolometer
384 × 288 or 640 × 480 (optional)
Pixel Pitch
12 μm
NETD ≤ 40 mK (@25°C)
Focal Length
100 mm (fixed)
FOV: 6.3° (H) × 4.7° (V)
Temperature Accuracy
±2°C or ±2% (whichever is larger)
Calibrated error ≤1.5°C within 100 m
Detection Range
4166 m (theoretical)
Effective recognition: ≥3200 m
ISO 18434-1 standard
Temp. Measurement Range
-20°C ~ +550°C (standard)
-40°C ~ +1500°C (optional)
Multi-point/region analysis

2.2.3 AI Analytics

Parameter
Specification
Notes
Fire Detection Algorithm
YOLOv5s-thermal + multi-modal fusion
Model size ≤8 MB (INT8 quantization)
Recognition Targets
Flame, smoke, thermal anomalies, intrusions
Customizable labels
Inference Latency
≤300 ms (edge NPU)
Huawei Ascend 310 or Hygon DCU
False Alarm Rate
≤4.7% (10,000-hour field test)
62% improvement over single sensors

2.3 Acoustic Deterrence Subsystem

Parameter
Specification
Notes
Sound Source
Piezoelectric ceramic array + electromagnetic-driven composite transducer
Patent ZL2023 1 0456789.2 (Chinese)
Peak SPL
147 dB ± 2 dB @ 1m
A-weighted, 1 kHz tone (CNAS certified)
Directivity (-3dB beamwidth)
Horizontal: 5° ± 0.5°
Vertical: 6° ± 0.8°
±10° electronic beam steering
Frequency Response
200 Hz ~ 8 kHz (main energy)
Extended to 100 Hz ~ 12 kHz (custom)
STI ≥ 0.65 @ 500 m
Sound Power
≥120 W RMS (peak 250 W)
Efficiency >45% (industry avg: 28%)
Acoustic Coverage
• Clear voice: ≤1000 m
• Deterrence (>120 dB): ≤500 m
• Perception (>100 dB): ≤1500 m
Open field, wind <3 m/s
Sound Modes
• Multilingual voice (8 languages)
• Alarms (continuous/pulse/frequency modulation)
• Non-lethal deterrence (1–3 kHz narrowband)
OTA-updatable templates
Trigger Logic
Thermal + visual + acoustic confirmation
Response delay <2.5 s
"Silent monitoring → sudden alert" mode

2.4 PTZ Mechanism

Parameter
Specification
Rotation Speed
Horizontal: 1°–12°/s
Vertical: 1°–8°/s
Rotation Range
Horizontal: 0°–360° continuous
Vertical: -10°–+110°
Positioning Accuracy
±0.05° (encoder feedback)
Preset Positions
256 (groupable)
Wind Resistance
Level 12 (32.7 m/s), auto-lock >25 m/s

2.5 Power and Communication

Parameter
Specification
Power Input
DC 24 V ±10% (PoE++ IEEE 802.3bt Type 4)
Max power: 185 W
Standby: <12 W
Backup Power
Built-in LiFePO₄ battery (48 V / 50 Ah)
Standby: ≥72 h
Communication
• 1× Gigabit Ethernet (RJ45)
• 1× 5G NR Sub-6GHz (Huawei Balong 5000)
• 1× BeiDou/GPS dual-mode (accuracy ≤2.5 m)
• 1× RS485
Wireless Protocol
MQTT 5.0 over TLS 1.3
SM2/SM3/SM4 encryption
QoS 2 delivery
Edge Computing
Atlas 500 3000 (optional)
CPU: Kunpeng 920 4-core
NPU: Ascend 310 4TOPS INT8
Memory: 8 GB LPDDR4x
Storage: 64 GB eMMC

2.6 Compliance and Certifications

Standard
Compliance
EMC
GB/T 17626.2~6 (ESD, RS, EFT)
CISPR 32 Class B
Safety
GB 4943.1-2022
IEC 62368-1:2018
Acoustic Safety
Compliance with China's
Noise Pollution Prevention Law
, Article 43:
• >120 dB SPL requires ≥50 m distance
• Human proximity radar auto-shutoff
Data Security
GB/T 35273-2020
Level 3 Cybersecurity Protection (China)
Industry Access
Emergency Management Ministry Fire Product Certification (XFCC-2024-CT235HD)
National Forestry Bureau Fire Prevention Equipment Catalog (2024)

3. Performance Comparison (vs Traditional Systems)

Metric
CT235HD
Traditional IR Camera
Manual Patrol
Fire Detection Time
2.1 ± 0.8 min
12.7 ± 4.3 min
28.5 ± 10.2 min
Night Recognition Rate
96.3%
68.1%
—
False Alarm Rate
4.7%
22.8%
—
Acoustic Coverage
1000 m (clear voice)
None
—
All-Weather Availability
99.2% annual
76.5%
60%
Single-Point Coverage
28 km²
8–12 km²
2–5 km²
Test Data Source: Field tests in Liangshan, Sichuan and Pu’er, Yunnan (27 units, 11,340 operating hours, 2024).

4. Deployment Recommendations

4.1 Key Applications

  • Forest Fire Prevention
  • Perimeter Security
  • Campus/Community Emergency Broadcasting

4.2 Installation Guidelines

  • Site Selection
  • Coverage Strategy
  • Power Supply
  • Communication Backup

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