Multi-targeting method and multi-targeting sensor device for locating short-range target objects in terms of distance and angle
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Abstract
A multi-targeting method for locating short-range target objects in terms of distance and angle. The method includes the following steps: a) a characteristic signal is emitted by a transmitting antenna of a first sensor element; b) the reflected characteristic signal is received by at least two adjacent reception antennae of the first sensor element; c) the difference in transit time of the reflected characteristic signal to the two adjacent reception antenna of the first sensor element is measured in order to determine the distance between the target objects and the first sensor element; and d) the phase differences of the characteristic signal between the two adjacent reception antenna of the first sensor element are measured in order to determine the angles between the target objects and the first sensor element. In addition, a device for implementing the above-mentioned method.
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Citations
36 Claims
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1-18. -18. (canceled)
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19. A method for distance and angle positioning of a plurality of close-range target objects, the method comprising the steps of:
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a) transmitting a characteristic signal using a transmitting antenna of a first sensor element;
b) receiving the characteristic signal reflected from the plurality of target objects using at least two adjacent receiving antennae of the first sensor element;
c) measuring propagation time differences of the reflected characteristic signal to the at least two adjacent receiving antennas so as to a determine respective distances of the target objects to the first sensor element; and
d) determining an angle of incidence for each of the target objects to the first sensor element, wherein the determining of the angle of incidence includes measuring phase differences of the reflected characteristic signal between the at least two adjacent receiving antennas, by subjecting each of the reflected characteristic signals received by the receiving antennae to a correlation with the transmitted characteristic signal so as to determine a complex correlation function that uniquely associates the measured phase differences with a distance, drawing a conclusion regarding the angle of incidence for each of the target objects according to the principle of retrodirective arrays. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A sensor device for distance and angle positioning of a plurality of close-range target objects, the sensor device comprising:
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a first sensor element having a first transmitting antenna and at least two adjacent first receiving antennae, the first transmitting antenna being configured to transmit a characteristic signal, and the at least two first adjacent receiving antennae being configured to receive the characteristic signal reflected from the plurality of target objects;
a measuring device configured to measure propagation time differences of the reflected characteristic signal to the two adjacent first receiving antennas so as to determine respective distances of each target object to the first sensor element; and
a device configured to measure phase differences of the reflected characteristic signal between the two adjacent receiving antennae so as to determine a respective angle of each target object to the first sensor element;
a correlator configured to subject each reflected transmission signal received by the first receiving antennae to a correlation with the characteristic signal so as to determine a complex correlation function uniquely associating the obtained phase information with a distance; and
a comparer unit configured to draw a conclusion with regard to the respective angle of incidence for each target object from the phase difference between the signals at the two receiving antennae according to the principle of retrodirective arrays. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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Specification