Method and device for determining separation and relative speed of a distant object
First Claim
1. A method for determining the distance (R) and relative speed (v) of at least one object remote from an observation point with the aid of electromagnetic signals, which are emitted from the observation point and whose frequency is shifted over a modulation range (fSweep) during a measuring interval, and which are in the form of signal sections (A, B) that are emitted alternately and exhibit a frequency spacing (fShift) from one another and whose echo signals are detected after reflection at the object, the phase difference (Δ
- ψ
) of the echo signals originating from the respective signal sections (A, B) being determined, characterized in that the signal sections (A, B) are emitted shifted in steps over the modulation range (fSweep) by in each case one frequency step (fIncr), and in that at least one sample is taken for each signal section to determine the phase difference (Δ
ψ
).
1 Assignment
0 Petitions
Accused Products
Abstract
The determination of separation (R) and relative speed (v) of at least one object which is distant from an observation point can be achieved by sending electromagnetic signals from the observation point, with a frequency shift over a modulation range (fSweep), in the form of signal segments (A, B) during a measuring interval, with a frequency separation (fShift) from each other which are transmitted alternately, the echo signals from which are detected after reflecting from the object. The phase difference (Δφ) of the echo signals arising from each signal segment (A, B) is detected. Said determination occurs with short reaction time and high precision whereby the signal segments (A, B) are transmitted with a stepwise shift each time by a frequency step (fIncr) over the modulation range (fSweep) and at least one sampled value for determination of the phase difference (Δφ) for each signal segment is taken.
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Citations
20 Claims
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1. A method for determining the distance (R) and relative speed (v) of at least one object remote from an observation point with the aid of electromagnetic signals, which are emitted from the observation point and whose frequency is shifted over a modulation range (fSweep) during a measuring interval, and which are in the form of signal sections (A, B) that are emitted alternately and exhibit a frequency spacing (fShift) from one another and whose echo signals are detected after reflection at the object, the phase difference (Δ
- ψ
) of the echo signals originating from the respective signal sections (A, B) being determined, characterized in that the signal sections (A, B) are emitted shifted in steps over the modulation range (fSweep) by in each case one frequency step (fIncr), and in that at least one sample is taken for each signal section to determine the phase difference (Δ
ψ
). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- ψ
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11. An apparatus for determining the distance (R) and relative speed (v) of at least one object remote from an observation point with the aid of an electromagnetic transmitter for alternately emitting signals whose frequency is shifted over a modulation range (fSweep) during a measuring interval, and which are in the form of signal sections (A, B) that are emitted alternately and exhibit a frequency spacing (fShift) from one another, and with the aid of a receiver for receiving the signal sections reflected by the object, the receiver having a device for establishing the phase difference (Δ
- ψ
) between the echo signals originating from the respective signal sections (A, B), characterized in that the signal sections (A, B) are emitted shifted in steps over the modulation range (fSweep) by in each case one frequency step (fIncr), and in that at least one sample is taken in the receiver for each signal section to determine the phase difference (Δ
ψ
). - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- ψ
Specification