Method and device for self-calibration of a radar sensor arrangemetn
First Claim
1. A method for operating a radar sensor system, having a number of adjacent individual sensors (3, 4, 5, 6), extensively synchronized with one another, for determining the position of a target object (15), in which in one measurement cycle, the transit time of each radar signal, emitted by an individual sensor and reflected back from the target object to this individual sensor (3, 4, 5, 6), is evaluated as a direct echo (13, 14);
- in the same measurement cycle, the transit time of each radar signal, emitted by one individual sensor (3, 4, 5, 6) and reflected from the target object (15) to a different individual sensor (3, 4, 5, 6), is evaluated as a cross echo (16);
from the evaluation of the direct and cross echoes (13, 14, 16), at least the position of the target object (15) is determined, and a detection quality signal (Q) is ascertained; and
in which after a predetermined amount of the detection quality signal (Q) for a target object (15), a calibration is performed by providing that from the deviation in the position of the target object (15) ascertained from the direct echoes (13, 14) and its position ascertained from the cross echoes (16), a correction variable for the cross echoes (16) is ascertained.
1 Assignment
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Accused Products
Abstract
A method and an apparatus for operating a radar sensor system with a number of adjacent individual sensors (3, 4, 5, 6), extensively synchronized with one another, for determining the position of a target object (15) are proposed. In one measurement cycle, the transit time of the radar signal emitted from one individual sensor and reflected by the target object to this individual sensor (3, 4, 5, 6) (direct echo (13, 14)) and to a different individual sensor (3, 4, 5, 6) (cross echo (16)) is evaluated. From the evaluation of the direct and cross echoes (13, 14, 16), at least the position of the target object (15) is determined, and a detection quality signal (Q) is ascertained, and once a predetermined amount of the detection quality signal (Q) is reached for a target object (15), a calibration is performed.
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Citations
9 Claims
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1. A method for operating a radar sensor system, having a number of adjacent individual sensors (3, 4, 5, 6), extensively synchronized with one another, for determining the position of a target object (15), in which
in one measurement cycle, the transit time of each radar signal, emitted by an individual sensor and reflected back from the target object to this individual sensor (3, 4, 5, 6), is evaluated as a direct echo (13, 14); -
in the same measurement cycle, the transit time of each radar signal, emitted by one individual sensor (3, 4, 5, 6) and reflected from the target object (15) to a different individual sensor (3, 4, 5, 6), is evaluated as a cross echo (16);
from the evaluation of the direct and cross echoes (13, 14, 16), at least the position of the target object (15) is determined, and a detection quality signal (Q) is ascertained; and
in whichafter a predetermined amount of the detection quality signal (Q) for a target object (15), a calibration is performed by providing that from the deviation in the position of the target object (15) ascertained from the direct echoes (13, 14) and its position ascertained from the cross echoes (16), a correction variable for the cross echoes (16) is ascertained. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification