Změna teplot sněhu při běhu na lyžích v obraze sekvenční termografie
Snow temperature change during cross-country skiing at moving thermography images

Summary/Abstract: Twenty years ago it was shown that friction increases the temperature of snow skis. Change of state permits for water skis glide. The aim of this pilot study was to determine whether dynamic infrared thermography is able to capture rapid changes in temperature of snow some areas (not just at one point), the ski tracks before and after passing.We monitored the snow on the track after 60 races two runners in various weights (86 and 73 kg) on two types of skis and lubrication (for classic and skating cross) and three different speeds (3,04±0,180, 3,81±0,273 a 5,30±0,314 m.s-1). Measurements of infrared radiation and the calculation of snow surface temperature immediately before and after passing skier was carried out thermo-graphic system FLIR SC620 with 30 Mhz.

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