A machine-vision vehicle service system, and methods of operation, incorporating at least one at least one camera and an optical projector for guiding placement of vehicle service components relative to a vehicle undergoing service. The camera and optical projector are operatively coupled to a processing system configured with software instructions to selectively control a projection axis orientation for the optical projector to enable projection of visible indicia onto various surfaces visible within the field of view of the camera.

A calibration system and a calibration bracket thereof. The calibration bracket includes: a base; a fixed vertical rod, one end of the fixed vertical rod being mounted on the base; a movable vertical rod, mounted on the fixed vertical rod, and being able to move relative to the fixed vertical rod along a length direction of the fixed vertical rod; a brake member, configured to provide a friction force for driving the movable vertical rod to be fixed relative to the fixed vertical rod along the length direction of the fixed vertical rod; and a hanging member, mounted on the movable vertical rod, the hanging member being used for hanging a calibration element, the calibration element being used for calibrating an advanced driver assistance system of a vehicle.

A testing device for testing a distance sensor that operates using electromagnetic waves includes: a receiving element for receiving an electromagnetic free-space wave as a receive signal (S.sub.RX); and a radiating element for radiating an electromagnetic output signal (S.sub.TX). In a test mode, a test signal unit generates a test signal (S.sub.test), and the radiating element is configured to radiate the test signal (S.sub.test) or a test signal (S′.sub.test) derived from the test signal (S.sub.test) as the electromagnetic output signal (S.sub.TX). In the test mode, an analysis unit is configured to analyze the receive signal (S.sub.RX) or the derived receive signal (S′.sub.RX) in terms of its phase angle (Phi) and/or amplitude (A) and store a determined value of phase angle (Phi) and/or amplitude (A) synchronously with the radiation of the test signal (S.sub.test) or of the derived test signal (S′.sub.test) as the electromagnetic output signal (S.sub.TX).

A vehicular apparatus is provided with a radar device. A station apparatus has a stop position for the vehicular apparatus. The station apparatus is provided with a signal source located at a position and transmitting a radio signal to the radar device. A receiver circuit of the radar device receives a radio signal from a signal source to output a received signal, when the vehicular apparatus stops at the stop position. A signal processing circuit of the radar device estimates distance and direction of the signal source with respect to the radar device based on the received signal. A control circuit of the radar device calibrates the receiver circuit, or the signal processing circuit based on known distance and direction of the signal source with respect to the radar device of the vehicular apparatus stopping at the stop position, so as to minimize errors of the estimated distance and direction.

A calibration utilizes reference data indicative of a position of a target element relative to a reference location, of a position of a reference point on a rotatable support relative to the reference location, orientation data indicative of at least one angular position of the rotatable support, and antenna measurement data indicative of electromagnetic echo signals received by a radar antenna from the target element. A measured position of the target element relative to the radar antenna is determined based on at least a portion of the antenna measurement data. A reference position of the target element relative to the radar antenna is determined based on the reference data and on at least a portion of the orientation data. At least one bias value or function associated with the orientation data and/or the antenna measurement data is determined based on a deviation between the determined measured position and reference position.

This document describes techniques for enabling radar system calibration with bistatic sidelobe compensation. Radar signals reflect off of a flat plate that changes orientation (e.g., elevation and/or azimuth angle) and position relative to a mounting position of a specific radar sensor being calibrated. For each radar sensor, measurements may be obtained across a range of translational positions of the flat plate. Highly accurate calibration errors are determined for each radar sensor this way. By calibrating radar systems repositioning the target during the data collection in this way, the prominence of any bistatic sidelobes appearing in measurements may be reduced or prevented, which may enable less-complex and more-accurate calibration of each unique radar system installation. An indication of each calibration error may be output for use in individually adjusting the mounting position of each specific radar sensor within a radar system.

A multi-target dynamic simulation test system for vehicle-mounted millimeter-wave (MMW) radar. The test system includes an antenna turntable, a radar pan-and-tilt head (PTH), a radar echo simulation module, a control module, a signal acquisition module and a display. A test radar is driven by the radar PTH to pan or tilt. The radar PTH and the test radar are both placed in a darkroom module. An antenna is driven by the antenna turntable to pan. The control module sends expected states of the test radar and the antennas to the radar PTH and the antenna turntable, respectively, and sends relative states between host vehicle and virtual targets to the test radar after processing by the radar echo simulation module. The signal acquisition module acquires and stores a detection signal of the test radar, and transmits the detection signal of the test radar to the display for real-time display.

A method for training a trainable module for evaluating radar signals. The method includes feeding actual radar signals and/or actual representations derived therefrom of a scene observed using the actual radar signals to the trainable module and conversion thereof by this trainable module to processed radar signals and/or to processed representations of the respective scene, and using a cost function to assess to what extent the processed radar signals are suited for reconstructing a movement of objects or to what extent the processed representations contain artifacts of moving objects in the scene. Parameters, which characterize the performance characteristics of a trainable module, are optimized with regard to the cost function. A method is also provided for evaluating moving objects from radar signals.

Low-cost devices and methods for measuring radar transmission and/or reflectance of coated articles, as well as methods for forming coatings on 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.

A vehicular radar auxiliary jig includes a transverse extensible bar, two longitudinal extensible bars and two upright bars. The longitudinal extensible bars are perpendicularly connected to two ends of the transverse extensible bar, respectively. One end of each longitudinal extensible bar is positioned distal to the transverse extensible bar and provided with a tire securing portion. The upright bars are perpendicularly connected to two ends of the transverse extensible bar and are perpendicular to the longitudinal extensible bars, respectively. One end of each upright bar is positioned distal to the transverse extensible bar and provided with a mounting portion, thereby connecting to an electromagnetic wave component. A vehicular radar mounting method and vehicular radar detecting method, each using the vehicular radar auxiliary jig, are provided. The vehicular radar auxiliary jig, vehicular radar mounting method and vehicular radar detecting method enable a vehicular radar to be mounted and tested efficiently.