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Title
Verfahren und Vorrichtung zur beruehrungslosen Geschwindigkeitsmessung auf Oberflaechen
Date Issued
2000
Author(s)
Weber, N.
Lueftner, H.
Seitzer, D.
Patent No
1995-19501228
Abstract
In a process and a device for contactless velocity measurement on surfaces, in particular the measurement of ski speed on snow surfaces, a signal at a fixed frequency is emitted in the direction of travel below a radiation angle, whereby the radiation angle is smaller than half the aperture of a device emitting the signal: a signal reflected by the surface is received, said signal being subjected to a Doppler shift in relation to the emitted signal; the spectral component with the highest frequency from the Doppler spectrum of the received signal and which exceeds a specific energy value is detected; and the speed is derived from the frequency of the detected spectrum component.
Language
de
Patenprio
DE 1995-19501228 A: 19950117