Among other things, techniques are described for a universal calibration target. The universal calibration target includes a core and an outer body. The core is core associated with a first salient property. The outer body is associated with a second salient property. The first salient property and the second salient property are configured to be observed by a sensor modality, and the first salient property and the second salient property correspond to at least one sensor of a vehicle.

A vision sensing system of a vehicle comprising a camera, an object detection module, and a calibration module. The object detection module is configured to detect a first object in data received from the camera. The calibration module is configured to calibrate the object detection module to detect the first object in the presence of a second object that obstructs a view of the camera and that includes a predetermined pattern sensed by the camera. A driver monitoring system for a vehicle comprises a camera and a driver monitoring module. The camera is arranged proximate to a steering wheel of the vehicle to monitor a face of a driver of the vehicle. The driver monitoring module is configured to detect an obstruction between the camera and the face of the driver and to ignore the obstruction in response to the obstruction including a predetermined pattern sensed by the camera.

Various aspects of the subject technology relate to a mobile support platform for vehicle sensor calibration. The mobile support platform includes a chassis, lift posts on the chassis configured to interface with one or more lift points on a vehicle and raise the vehicle, and a set of wheels mounted to the chassis configured to carry the vehicle through a calibration sequence.

Apparatus for detecting misalignment of a radar unit (2; 22) of a vehicle (3; 23), the apparatus comprising: a magnet (1; 21), which may be a permanent magnet or an electromagnet, arranged to be mounted on the vehicle (3; 23) spaced from the radar unit (2; 22); a magnetic field sensor (4; 24), typically a three-axis magnetic field sensor, such as a Hall Effect Sensor, arranged to be coupled to the radar unit (2; 22) and having an output at which a signal indicative of the magnetic field at the magnetic field sensor (4; 24); and a processor (5; 25) coupled to the output and arranged to determine a misalignment of the radar unit (2; 22) based on the output of the magnetic field sensor (4; 24). Where the magnet is an electromagnet (21), the field strength of the electromagnet (21) can be varied by its drive circuit (30).

Low-cost devices for measuring radar transmission and/or reflectance of coated articles are provided. An exemplary low-cost radar transmission and reflection measurement device includes a radar transmitter that emits a radar signal, a radar target to which the radar signal is directed, and a radar receiver that receives the radar signal. Further, the exemplary low-cost device includes a sample holder located between the radar transmitter and the radar target and between the radar target and the radar receiver. The sample holder receives a sample including a coating. The low-cost device also includes a controller connected to the radar transmitter and radar receiver. The controller measures a radar signal loss due to the coating.

An apparatus (1) for calibrating an ADAS sensor of an advanced driver assistance system of a vehicle (9) positioned in a service area (8), includes: a support structure (3); a vehicle calibration assistance structure (4), mounted on the support structure (3) and including a calibration device (41, 42) configured to facilitate aligning or calibrating the ADAS sensor of the vehicle (9); a positioning system; a computer (102), having access to a database (101) and configured to: receive one or more information items as input; query the database (101) to retrieve a reference parameter (111) and a geometric parameter (112) as a function of the input information; process the reference parameter (111) and the geometric parameter (112) to generate derived data (114) relating to a reference position of the vehicle calibration assistance structure (4).

A system and method of calibrating an ADAS sensor of a vehicle by aligning a target with the sensor, where the vehicle is initially nominally positioned in front of a target adjustment stand that includes a stationary base frame and a movable target mount configured to support a target, with the target adjustment stand including one or more actuators for adjusting the position of the target mount. A computer system is used to determine an orientation of the vehicle relative to the target adjustment stand, with the position of the target mount being adjusted based on the determined orientation of the vehicle relative to the target adjustment stand. Upon properly orienting the target mount, and the target supported thereon, a calibration routine is performed whereby the sensor is calibrated using the target.

The present disclosure provides a system for processing radar data. The system may comprise a frequency generator configured to generate a reference frequency signal; a timing module configured to generate a shared clock signal or a plurality of timing signals; and a plurality of radar modules in communication with the frequency generator and timing module. The radar modules may be configured to: (i) receive the reference frequency signal and at least one of a shared clock signal and a timing signal, (ii) transmit a first set of radar signals based in part on the reference frequency signal and at least one of the shared clock signal and the timing signal, and (iii) receive a second set of radar signals reflected from a surrounding environment. The system may comprise a processor configured to process radar signals received by each radar module, by coherently combining radar signals using phase and timestamp information.

A system for testing a driver assistance system of a motor vehicle is provided, wherein the driver assistance system comprises a control unit configured to process sensor signals of at least one environment sensor of the motor vehicle, wherein the environment sensor is configured to detect environmental information and convert it into sensor signals. The system comprises a vehicle test bench configured to operate at least one drive train of the motor vehicle, with at least one simulation module, wherein the simulation module incorporates at least one environment sensor and comprises a stimulation device allocated to said environment sensor. The environment sensor incorporated by in the simulation module corresponds, for example functionally and/or structurally, to the environment sensor of the motor vehicle or is the environment sensor of the motor vehicle. The simulation module is connected to the vehicle test bench in order to transmit a sensor signal from the simulation module to the control unit of the driver assistance system.

A radar system (2) for a vehicle (1), having a radar transceiver (3) and a control unit (4), where the control unit (4) is adapted to control the radar transceiver to apply an initial signal power level (P.sub.i) for transmitted radar signals (5); and to receive reflected radar signals (6) that have been reflected by at least one object (7). The control unit (4) is further adapted to determine a total signal reduction level (L) for which at least one predetermined criterion is not met; to compare the total signal reduction level (L) to a threshold; and to determine whether the radar transceiver (3) is working in an acceptable manner or not in dependence of the comparison.