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1. Tunnel visibility detector product introduction
Tunnel visibility detector is used to collect carbon monoxide and tunnel visibility data online to provide decision-making basis for tunnel ventilation and road safety.Tunnel visibility detector works according to the transmission principle. The transmitter/receiver and reflector are installed relative to each other. After using the bracket to fix the alignment, the highly focused beam emitted by the optical component becomes a detection beam. The installation distance is 3 meters (round trip dual optical path, actual detection light The distance is 6 meters), due to the attenuation of dust, the receiver obtains the signal and then processes it into a measured value. According to the requirements of my country's "Road Tunnel Ventilation and Lighting Design Code", it is installed on the top or side wall of the tunnel.
This intelligent detector has a built-in compensation function. When the optical lens is contaminated, it can automatically perform gain compensation, thereby ensuring a longer maintenance cycle. The 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 particulate matter, which will directly affect the safety of the tunnel. The personal safety of tunnel vehicle drivers and maintenance staff.
Tunnel visibility detector 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 detector
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. Specifically designed for the harsh environment of tunnels;
5. Effectively avoid inability to measure caused by vibrations from the environment and passing vehicles;
6. Low installation, startup and maintenance costs;
7. The instrument comes with status display, fault alarm and data storage functions to facilitate debugging and equipment maintenance;
8. Multiple output methods, convenient data collection;
9. Unique compensation function ensures a longer maintenance cycle;
10. Non-contact, continuous monitoring of visibility;
11. Uses the latest microprocessor technology and operates completely digitally.
3. Technical parameters of Tunnel visibility detector
Installation method: wall mounting
Power supply mode: AC220V
Measured value: VI value: 1/m, CO concentration: PPM
Measuring principle: ray projection method
Measuring range: VI: 0--15×10-3 1/m, CO: 0--400PPM
Measuring distance: 6 meters optical path (probe installation distance 3 meters)
Accuracy: VI: ±0.0001 1/m, CO: ±1PPM
Output interval: 60 seconds
Digital output: RS485
Analog signal output: two channels 0/4mA-20mA (internal impedance is not large
at 500Ω)
Reliability: mean time between failures not less than 5,000 hours
Automatic compensation function: VI has self-calibration and automatic zero functions