G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 13/34 (2006.01) G01F 23/284 (2006.01) H03L 7/18 (2006.01)
Patent
CA 2267055
An arrangement for the precise measuring of the distance, in particular the filling level of a liquid in a tank, by means of FMCW radar, provides that the output frequency of a frequency-variable oscillator is linked in a phase-lacked loop to a reference signal and that the reference signal in thin case is obtained digitally, preferably based on the principle of the digital direct synthesis DDS, from a stabilized fixed- frequency oscillator signal. The arrangement according to the invention makes it possible to measure distances in the range of, for example, 50 m with an accuracy of one or several millimeters. Standard components, which are generally used for generating and stabilizing the oscillator signal, can be used for this arrangement, thereby ensuring a low-cost setup of the arrangement.
Cramer Stefan
Gluth Rolf
Zimmermann Berthold
Daimlerchrysler Ag
Eads Deutschland Gmbh
Fetherstonhaugh & Co.
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