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A New Line of Defense in Smart Tunnels: A Comprehensive, All-Scenario Solution Featuring Dual-Light Fusion Temperature Measurement
Jun 11,2026
I. The key to tunnel safety lies not merely in “seeing vehicles,” but in detecting temperature anomalies well in advance.
Highway tunnels are quintessential enclosed traffic environments: they feature dense vehicle flows, elongated spatial dimensions, and limited ventilation. When abnormal temperature rises occur in vehicle tires, braking systems, engine compartments, or cargo areas, the risk can escalate much more rapidly than on conventional open roads. Traditional tunnel monitoring primarily addresses whether vehicles are present, whether congestion exists, and whether accidents have occurred, but its ability to detect excessive vehicle temperatures, localized hotspots, and early signs of fire is severely constrained.
The value of the tunnel‑specific dual‑light fusion temperature‑measurement system lies in upgrading conventional video surveillance to an integrated perception platform that combines visible‑light imaging, thermal‑imaging temperature measurement, and backend alarm linkage. It does more than simply detect vehicles passing through; as vehicles traverse the tunnel’s monitoring points, it continuously captures their thermal‑distribution data, enabling the identification of abnormal temperature rises and the issuance of timely warnings.
Sosk SSK/NW-TX9800 Tunnel-Specific Dual-Optical Fusion Temperature Measurement System It employs both visible-light and infrared thermal imaging sensors, supporting real-time fusion of thermal and visible imagery. Infrared thermal imaging captures the location and temperature of heat sources, while visible-light imaging provides high-resolution details of the target.
II. Why is dual-light fusion more essential inside tunnels than a single-camera approach?
A single visible-light camera can capture a vehicle’s exterior, lane markings, and traffic‑flow status, but it cannot detect temperature. Localized heating in vehicle tires, brake discs, the engine compartment, cargo compartments, or underbody often remains barely perceptible in standard video footage during the early stages. By the time smoke appears, a fire breaks out, or the vehicle comes to a stop, the situation has already progressed to the accident‑response phase.
A single thermal imaging device can detect heat sources, but the image details are less intuitive than those in visible-light imagery. If operators rely solely on thermal images, they may identify areas of elevated temperature, yet it can be difficult to quickly determine which vehicle, which zone, or which specific location is involved.
This is where the advantages of dual‑light fusion lie:
Visible light is responsible for clearly perceiving vehicles and the surrounding scene;
Thermal imaging is responsible for detecting temperature anomalies;
The fused image overlays the location of heat sources onto the real‑world vehicle view, enabling backend personnel to assess risks more quickly.
The TX9800 supports thermal‑imaging channel fusion with visible‑light imagery, enhancing image detail in the thermal channel; it also enables the visible‑light channel to overlay the thermal image in a picture‑in‑picture format.
III. The core of vehicle temperature monitoring is to detect fire risks at an early stage.
Tunnel vehicle fires rarely erupt instantaneously. In many cases, the risk first manifests as localized abnormal temperature rises—such as overheated tires, elevated brake‑system temperatures, excessive heat in the engine compartment, or localized heating of cargo. If these anomalies can be detected while the vehicle is still operating normally, it becomes possible to issue early warnings, provide alerts, guide drivers, and initiate appropriate response measures.
The SSK/NW-TX9800 supports multiple temperature‑measurement modes, enabling temperature monitoring of key areas in the image via point measurement, area measurement, and line measurement. It also allows for preset temperature‑measurement scenes and the configuration of multiple temperature‑measurement rules.
In high-speed tunnels, temperature-measurement zones can be configured based on the specific location.
Conduct comprehensive thermal screening of vehicles entering the tunnel;
Perform area‑of‑interest temperature measurements on the vehicle’s side panels, tire zones, and underbody.
Temperature measurement is conducted along the lane cross-section.
Trigger a platform alarm for abnormal heat sources;
Capture images, record video, and log events for alerted vehicles.
This approach does not involve waiting for a vehicle to catch fire before reviewing surveillance footage; instead, it shifts monitoring forward to the “abnormal temperature‑rise phase.”
4. The over-temperature alarm in the backend is key to truly establishing a closed-loop system.
A tunnel temperature‑monitoring system should not merely display a thermal‑imaging image at the front end. What truly adds value is the system’s ability to automatically trigger an alarm in the background when a vehicle’s temperature exceeds the preset threshold, while simultaneously activating linked functions such as platform integration, video recording, snapshot capture, and alarm output.
The TX9800 supports alarm input and output, and can perform various alarm functions such as SD‑card recording, digital output, intelligent snapshot capture, FTP upload, and email notifications. It also supports local storage, NAS, and network transmission, facilitating event management on the backend platform.
In tunnel applications, backend alarms can establish a complete workflow:
Vehicles pass through the monitoring point;
The front end captures both visible-light and thermal imaging footage.
The system calculates the temperature of key areas.
An alert is triggered when the threshold is exceeded.
The vehicle dashboard and heat map pop up in the background.
Interconnected audio‑visual alarm, information display board, or tunnel broadcasting system;
Management personnel guide vehicles to exit or enter the inspection area.
This is the core value of the intelligent tunnel vehicle over-temperature early-warning system.
5. The tunnel environment is complex, and equipment must be capable of long-term, stable operation.
The tunnel environment is far from ideal. Vehicle exhaust, dust, high humidity, vibrations, diurnal temperature fluctuations, and continuous, round‑the‑clock operation all put the stability of front‑end equipment to the test. A standard camera that addresses only video‑image quality may not be well suited to handling temperature‑measurement and early‑warning tasks.
The TX9800 boasts an IP67 protection rating, operates in ambient temperatures ranging from –40°C to 70°C, and features lightning and surge protection. Its low‑power design ensures reliable, continuous operation over extended periods.
For high-speed tunnel projects, stability is more critical than short-term demonstration performance. Since the equipment must remain installed in the tunnel over the long term, it must be capable of continuously capturing images, performing continuous temperature measurements, and transmitting data without interruption, while maintaining stable connectivity with the backend platform.
VI. From Single-Point Monitoring to Tunnel-Wide Temperature Measurement and Early Warning Across All Scenarios
The tunnel‑specific dual‑light fusion temperature‑sensing system is not a simple camera replacement; rather, it serves as a front‑end sensing node within the tunnel fire‑prevention and control framework. It can be deployed at locations such as the tunnel entrance section, key cross‑sections inside the tunnel, areas immediately after long downhill grades where vehicles enter the tunnel, critical road segments frequented by hazardous‑material vehicles, and the mid‑section of extra‑long tunnels.
In the engineering plan, multi-point deployment can be established:
Identify high-risk vehicles before entry;
Continuous monitoring of vehicle temperatures inside the tunnel;
Dual‑light fusion temperature measurement is conducted at key cross‑sections.
The backend platform centrally displays alarm events.
Integration of audio‑visual systems, information display boards, public address systems, and emergency response procedures.
In this way, tunnel safety management has evolved from “video‑based surveillance” to “vehicle temperature monitoring,” and from “post‑incident response” to “early warning of abnormal temperature rises.”
Summary
The core value of the SSK/NW-TX9800 tunnel‑specific dual‑light fusion temperature‑measurement system lies in its ability to perform visible‑light observation, thermal‑imaging temperature measurement, and backend over‑temperature alarm for vehicles traveling through high‑speed tunnels. It is not an ordinary camera; rather, it is a front‑end sensing device designed for early warning of vehicle fires.
By integrating dual‑light imaging, temperature monitoring in key areas, alarm linkage, and platform‑based logging, the system enables tunnel operators to detect abnormal vehicle temperature rises at an earlier stage, thereby gaining valuable time for vehicle guidance, risk mitigation, and fire prevention.
Corresponding Device Orientation (Important)
For different application scenarios, common corresponding device orientations include:
- Product link: https://www.settall.com/products_details/SSK/NW-TX9800.html
- Product Name: Tunnel-Specific Dual-Optical Fusion Temperature Measurement System
- Product Model: SSK/NW-TX9800
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EMAIL:Guojin@settall.com
8th Floor, Building 14, Zone 7, Headquarters Base, West Outer Ring Road, Fengtai District, Beijing
