发明授权
- 专利标题： VERFAHREN UND VORRICHTUNG ZUR BERÜHRUNGSLOSEN GESCHWINDIGKEITSMESSUNG AUF OBERFLÄCHEN
- 专利标题（英）： Process and device for non-contact measurement of speed on surfaces
- 专利标题（中）： 方法和装置用于非接触转速测量表面上
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申请号： EP95937837.3申请日： 1995-10-24
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公开(公告)号： EP0804745B1公开(公告)日： 2000-01-26
- 发明人: WEBER, Norbert , LÜFTNER, Harald , SEITZER, Dieter
- 申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- 申请人地址： Leonrodstrasse 54 80636 München DE
- 专利权人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- 当前专利权人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
- 当前专利权人地址： Leonrodstrasse 54 80636 München DE
- 代理机构： Schoppe, Fritz, Dipl.-Ing.
- 优先权： DE19501228 19950117
- 国际公布： WO9622549 19960725
- 主分类号： G01S15/60
- IPC分类号： G01S15/60 ; G01S13/60 ; G01C22/00
摘要：
In a process and with a device for non-contact measurement of speed on surfaces, in particular for ski speed measurement on snow surfaces, a signal (102) with a fixed frequency is beamed in the direction of travel (106) at a beam angle ( alpha ) which is less than a half aperture angle ( THETA /2) of the device (100) emitting the signal (102); a signal (110) reflected at the surface (104) and Doppler-shifted relative to the beamed signal (102) is received; from the Doppler spectrum of the received signal (110) that portion with the highest frequency and an energy value above a predetermined level is determined, and the speed is derived from the frequency of the determined portion of the spectrum.
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