Some reflective vests that are commonly sold in our country do not see in the dark. They found that researchers from the Brno University. These include vests purchased in the marketplace. They do have a label on Standards for Attestation, but are dysfunctional. The obligations in the dark, wear reflective elements are pedestrians outside the village for more than a year.

 

Researchers from the Faculty of Electrical Engineering and Communication BUT reflective vests tested in the field. They use a special device to the camera, which can create so-called brightness map. It shows how the character is in contrast with the night view of the surroundings. “What you see here is a luminance analyzer, which is built on a digital SLR, which is specially adapted for this case, then use photo software analyze,” says head of the laboratory of lighting technology Jan Skoda.

 

Two helpers went into the dark, 80 meters from the car. This distance must be visible to the driver in the speed ninety managed pedestrians react. Technician with the device in a car is focused, photographed and analyzed device. “From the brightness maps goes to see, to see there is only one safety vest, one cannot see,” said Jan measurement result.

 

Buy cheap vest is gambling with life

“A couple of crowns can mean the difference between life and death. A colleague is wearing a vest from the market and whether the record has not been seen, “said the researcher analyzes accidents Institute of Forensic Engineering Michal. Quality vest comes to about two hundred crowns and drivers can buy it for example at a gas station or store the car. According to those researchers believe possible. Reflective elements are vests for night illumination clearly seen already at a distance of 300 meters.

 

Neither the label with a certificate of quality guarantee vests

The market is worth about fifty crowns vest. Even such a majority is required on the label certification. That will see in the dark, but despite this is not guaranteed.

 

Now that my vest attestation in controlling Czech Trade Inspection enough. If running really well lit, it had not determined. The obligations in the dark, wear reflective elements are pedestrians outside the village for more than a year. That has not been seen, for example, cost the life and walker at last year’s accident in eastern Moravia. Darkness came only in dark clothes.