G - Physics – 01 – S
Patent
G - Physics
01
S
343/29
G01S 13/58 (2006.01) G01S 1/60 (2006.01) G01S 13/62 (2006.01)
Patent
CA 1101969
PHF 76-611 ABSTRACT: A radio range measuring apparatus having a controlled modulation slopein order to keep the beat frequency between the transmitted signal and the received signal constant. This device is arranged for measuring the speed at which a mobile target approaches or recedes by means of a generator of a fixed frequency which, after frequency division, maintains the duration between the start of the two consecutive sawtooths fixed. A particu- lar line of the beat signal is demodulated by this fixed frequency via a mixer whose output is filtered by a pass- band filter. The signal at the output of the filter has a frequency which is equal to the Doppler frequency, proportional to the speed. The apparatus is used for the control of the mooring procedure of a big ship.
293112
Telecommunications Radioelectriques Et Telephoniques T.r.t.
Van Steinburg C.e.
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