Tunnel visibility detector

1. Product Introduction of Tunnel Visibility Meter

The tunnel visibility detector is also called the tunnel COVI detector. The tunnel visibility detector can provide users with the visibility value in the area of the road and the smoke concentration in the tunnel in real time. It also has the functions of data storage and complete data post-processing analysis. The FT-SDN1 detector works according to the principle of transmission. The emitter/receiver and the reflector are installed relatively. The detection optical distance is 6 meters), due to the attenuation of dust, the receiver gets the signal and processes it into the measured value. According to the requirements of my country's "Code for Design of Highway Tunnel Ventilation and Lighting", it is installed on the top or side wall of the tunnel.

The intelligent detector has a built-in compensation function, which can automatically perform gain compensation when the optical lens is polluted, thus ensuring a longer maintenance period. Tunnel is a special tubular structure. Due to its small space and airtight characteristics, if the exhaust gas emitted by vehicles passing through the tunnel is not discharged in a timely and reasonable manner, it will cause the accumulation of CO and suspended particles, which will directly affect the quality of the vehicles passing through the tunnel. The personal safety of the vehicle drivers, passengers and maintenance staff in the tunnel.

FT-SDN1 series is designed to collect VI/CO data online and provide it to the traffic supervision department to provide decision-making basis for tunnel ventilation and road safety.

2. Product Features of Tunnel Visibility Meter

1. Visibility (VI) and carbon monoxide (CO) can be measured simultaneously or separately;

2. High resolution visibility measurement;

3. The measurement is completely unaffected by other stray light sources;

4. Specially designed for the harsh environment of the tunnel;

5. Effectively avoid the inability to measure caused by the vibration of the environment and passing vehicles;

6. Low installation, start-up and maintenance costs;

7. The instrument comes with status display, fault alarm and data storage functions, which is convenient for debugging and equipment maintenance;

8. Multiple output modes, convenient for data collection;

9. The unique compensation function ensures a long maintenance cycle;

10. Non-contact, continuous monitoring of visibility;

11. Using the latest microprocessor technology, fully digital operation.

3. Technical parameters of tunnel visibility detector

Installation method: wall installation

Measured value: VI value: 1/m, CO concentration: PPM

Measuring range: VI: 0--35×10-3 1/m, CO: 0--500PPM

Measuring distance: 6 meters optical path (probe installation distance 3 meters)

Accuracy: VI: ±0.0001 1/m, CO: ±1

Digital output: RS485

Analog signal output: two channels 0/4mA-20mA (internal impedance is not greater than 500Ω)

Automatic compensation function: VI has self-calibration and automatic zero function