| 摘要 |
The present invention relates to a radar measuring device which, with a simple design, ensures reliable distance determination even when a mixed signal is zero, and a method for operating a radar measuring device. The radar measuring device includes: A high-frequency oscillator ( 11 ) which emits two different carrier frequency signals (F 1 , F 2 ), A first switching device ( 14 ) for switching the carrier frequency signals (F 1 , F 2 ) as a function of first pulse signals (P 1 ) and emitting radar pulse signals (T 1, 2 ), A transmission antenna ( 16 ) and a receiving antenna ( 18 ), A second switching device ( 24 ) for switching the carrier frequency signals as a function of a delayed second pulse signal (P 2 ) and emitting delayed radar pulse signals (S 1, 2 ), A mixing device ( 21 ) for mixing received radar signals (R 1, 2 ) with the delayed radar pulse signals (S 1, 2 ) and emitting mixed signals (M 1, 2 ). The phase differences between the received radar signals (R 1, 2 ) and delayed radar pulse signals (S 1, 2 ) differ by a predetermined value when the two carrier frequency signals (F 1, 2 ) are emitted. An amplitude signal is subsequently determined from the first and second mixed signal (M 1, 2 ).
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