A method for operating a radar system, which includes at least two radar sensors. A signal is transmitted in the radar sensors for transmitting at least one radar signal. A signal processing is performed in the radar sensors for ascertaining a piece of detection information by the radar sensors in each case, which is specific to the radar signal transmitted. A disturbance evaluation is performed for detecting at least one disturbance in the radar sensors based on the particular piece of detection information. At least one adjustment option is provided for avoiding the at least one detected disturbance by an adjustment of the signal transmission. An evaluation is performed of the at least one adjustment option for the radar sensors and a coordination of the adjustment options is performed. An adjustment of the signal transmission is performed according to the at least one adjustment option.

A method for operating a radar system, which includes at least two radar sensors. A signal is transmitted in the radar sensors for transmitting at least one radar signal. A signal processing is performed in the radar sensors for ascertaining a piece of detection information by the radar sensors in each case, which is specific to the radar signal transmitted. A disturbance evaluation is performed for detecting at least one disturbance in the radar sensors based on the particular piece of detection information. At least one adjustment option is provided for avoiding the at least one detected disturbance by an adjustment of the signal transmission. An evaluation is performed of the at least one adjustment option for the radar sensors and a coordination of the adjustment options is performed. An adjustment of the signal transmission is performed according to the at least one adjustment option.

A target alignment system for calibrating a safety sensor mounted on a vehicle with front and rear wheels by locating an optimum target position upon a horizontal surface for accurate calibration of the sensor. The target alignment system comprises a plurality of visual guide projectors and a pair of target assemblies which project a visible guide line perimeter around the vehicle, the perimeter including parallel longitudinal lines on either side of the vehicle, a lateral alignment guide line crossing the longitudinal lines in front of the vehicle, and a center guide line colinear with the vehicle center line. The front and rear wheels of the vehicle are longitudinally aligned causing the vehicle thrust line to match the vehicle center line. One of the visual guide projectors projects a transverse line across the center guide line, creating an intersection point which marks the optimum target position.

A three-dimensional (3D) terrain reconstruction method for a scoured area around bridge pier foundation based on a mechanical scanned imaging sonar includes scanning an overall terrain of a scoured area around bridge pier foundation with a sonar from different azimuths to acquire n sonar images of a foundation scouring terrain; intercepting multiple analysis sections from each of acquired sonar images at a same distance; extracting key parameters of upper and lower edges on a terrain imaging strip in each of the analysis sections in the image, and transforming extracted parameters to a 3D space, a fan-shaped beam surface of the sonar being represented with a fan-shaped arc; recognizing a scour terrain profile in the analysis section; recognizing terrain profiles one by one, and respectively extracting spatially scattered 3D coordinate data; and performing interpolation and fitting on the spatially scattered data, thus implementing 3D reconstruction for the foundation scouring terrain.

A method for determining a longitudinal velocity of a vehicle using at least one radar sensor and an installation orientation of the at least one radar sensor during cornering, wherein the method comprises: determining at least one velocity vector of the at least one radar sensor during cornering of the vehicle, wherein the at least one velocity vector contains a longitudinal velocity component and a lateral velocity component of the at least one radar sensor, transmitting the at least one velocity vector to a module for estimating the longitudinal velocity of the vehicle and the installation orientation of the at least one radar sensor, and estimating the longitudinal velocity of the vehicle and the installation orientation of the at least one radar sensor at least on the basis of the at least one velocity vector transmitted to the module and via the module.

A system and method for guiding placement of a vehicle service external fixture relative to a vehicle undergoing service or inspection. A vehicle service system support structure having at least one camera module is positioned at an initial location within a vehicle service area, and a location of the initial location within a vehicle reference frame is established from images of optical targets secured to the vehicle. The vehicle service system support structure is subsequently repositioned relative to the vehicle to a new position located outside of an external fixture placement region, while maintaining at least one of the observed optical targets within a field of view of the camera module. The new position of the vehicle service system support structure within said vehicle reference frame is determined from target images, and a placement location within the placement region for the external fixture is identified relative to the vehicle.

The present disclosure relates to a radar device, including a transmitter circuit configured to generate an RF oscillator signal and to transmit an RF fault detection signal based on the RF oscillator signal, a receiver circuit configured to receive an RF reception signal based on the RF fault detection signal and to mix the RF reception signal with the RF oscillator signal in order to obtain a down-converted reception signal, and a fault detection circuit configured to detect a hardware fault of the radar device based on a phase of the down-converted reception signal.

According to a further example implementation, the method comprises measuring magnitude response information relating to an analog baseband signal processing chain of a reception channel of a radar system, determining—based on the measured magnitude response information—at least one value which characterizes at least one frequency limit of the first baseband signal processing chain, and determining a phase response for the baseband signal processing chain based on the at least one value and a model of the baseband signal processing chain. The method also comprises digitizing an output signal from the baseband signal processing chain and digitally processing the digitized output signal, wherein phase equalizing is carried out based on the determined phase response during normal radar operation of the radar system.

According to a further example implementation, the method comprises measuring magnitude response information relating to an analog baseband signal processing chain of a reception channel of a radar system, determining—based on the measured magnitude response information—at least one value which characterizes at least one frequency limit of the first baseband signal processing chain, and determining a phase response for the baseband signal processing chain based on the at least one value and a model of the baseband signal processing chain. The method also comprises digitizing an output signal from the baseband signal processing chain and digitally processing the digitized output signal, wherein phase equalizing is carried out based on the determined phase response during normal radar operation of the radar system.

A method for calibrating a vehicular radar sensing system includes disposing two spaced apart calibrating radars at respective transmitting locations that are spaced from a vehicle calibration location at an end of line portion of a vehicle assembly line, and moving a vehicle along the vehicle assembly line, the vehicle including an electronic control unit (ECU) and a vehicular radar operable to sense exterior of the vehicle. Signals are transmitted via the first and second calibrating radars at the transmitting locations and, with the vehicle at the vehicle calibration location, the plurality of radar receivers of the vehicular radar receive the transmitted signals transmitted by the first and second calibrating radars, and the vehicular radar generates an output that is processed at the ECU. Responsive to processing at the ECU of the output of the vehicular radar, misalignment of the vehicular radar at the vehicle is determined.