Method for calibrating a sensor cluster in a motor vehicle

Abstract

Embodiments herein relate to a method for calibrating a sensor cluster (1) which is located at an inside of a windshield (2) of a motor vehicle (3) and arranged such that the pitch thereof is adjustable. The sensor cluster (1) at least comprises a narrow beam sensor (4) and an imaging sensor (5) both of which are directed forward of the motor vehicle (3). An angle gamma (y) between the center directions (6, 7) of the narrow beam sensor (4) and the imaging sensor (5) of the sensor cluster (1) has been pre-calibrated and stored in at least one memory unit (8, 9). The method comprises the steps of: calibrating at least one of the narrow beam sensor (4) and the imaging sensor (5) of the sensor cluster (1) with respect to a geometrical travel axis (10) of the motor vehicle (3); recording a measure epsilon (µ) corresponding to an angle between a center direction (7) of the imaging sensor (5) and a reference provided by a fixed vehicle (3) structural part (11); and storing the recorded measure epsilon (µ) in the at least one memory unit (8, 9).

Description

technical field [0001] Embodiments herein relate to a method for calibrating a sensor cluster positioned inside a windscreen of a motor vehicle, the sensor cluster comprising at least a narrow beam sensor and an imaging sensor. [0002] Further embodiments herein also relate to a motor vehicle comprising a sensor assembly comprising at least a narrow beam sensor and an imaging sensor, and the sensor assembly has been calibrated according to the method described above. Background technique [0003] In motor vehicles, sensor assemblies are used to record the vehicle environment. In particular, sensor assemblies are used in driver assistance systems. [0004] In order to provide data for such driver assistance systems, the use of sensor assemblies in motor vehicles is becoming more and more common, sometimes comprising sensors of different technologies, the extent of which may at least partially overlap. In particular, the use of sensor assemblies consisting of two different ...

AI Technical Summary

Problems solved by technology

[0009] While the calibration device suggested by US 2009033926 may provide an adequate calibration of imaging sensors for some situations, the device of US 2009033926 is not suitable for calibration of sensor assemblies comprising multiple sensors due to, for example, Alignment differences can provide insufficient alignment for proper functioning of certain kinds of sensors, such as narrow beam sensors such as RADAR, LIDAR, or sensors based on LASER technology

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