Tunnel visibility detector helps driving safety

The tunnel is a relatively closed section of highway, and low visibility is an important safety hazard of the tunnel. If the speed is too fast, it is easy to rear-end the car in front, coupled with the narrow space, which increases the difficulty of rescue. Therefore, domestic tunnels generally have a speed limit of 60km/h or 80km/h. And there will be speed cameras at the tunnel entrance.

Tunnel visibility detector FT-SN1 is used to measure tunnel visibility instrument, its working principle is: transmission. The transmitter/receiver and the reflector are installed relative to each other, and after fixed alignment with the support, the highly focused beam emitted by the optical component becomes a detection beam, and the installation distance is 3 meters (round-trip dual optical path, the actual detection optical path is 6 meters). Due to the attenuation of the dust, the receiver receives the signal and processes it into the measured value.

The traffic safety in the tunnel is a very important problem. The characteristics of the tunnel pipeline bring the "motion effect" of driving into full play. As drivers drive through the tunnel, their field of vision gets smaller and smaller, and they lose sight of what's going on around them and on both sides. And due to the emission of vehicle exhaust and smoke, coupled with the tunnel ventilation is not timely, will lead to the concentration of salt spray, further reduce visibility, therefore, it is necessary to measure the visibility in the tunnel in time, in order to take countermeasures.

Tunnel visibility detector FT-SN1 installed in the tunnel, collect on-site data, and transmit it to the background management center, the instrument will automatically issue an alarm when failure, a variety of output methods, with automatic compensation function.

In addition, the device measures the concentration of carbon monoxide and monitors the air quality inside the tunnel in real time.

At present, the market has begun to gradually promote the use of tunnel visibility detector FT-SN1. The equipment is suitable for high-speed sections, has wide application, stable performance and long service life.