A method with three-dimensional (3D) position measuring using a radio detection and ranging (radar) sensor includes: transmitting, through the radar sensor, a transmission signal of which a carrier frequency varies over time; obtaining, through the radar sensor, a reflected signal from the transmission signal being reflected by an object; obtaining a beat frequency signal indicating a frequency difference between the transmission signal and the reflected signal; and estimating 3D position information of the object based on groups of sample data of different frequency bands extracted from the beat frequency signal.

Systems and methods for sensing the surroundings of vehicles via vehicle mounted radar sensors. A directional transmitter array transmits radiation into the region surrounding the vehicle and a receiver array receives the radiation reflected back. Controllers may use self-velocity calculation modules, wall detection modules, dynamic range enhancement modules, double reflection detection modules and the like to harvest useful information such as the vehicles relative speed and the identification of hazards in its surroundings.

Fall detection systems and methods use radar chips to scan monitored regions such that data obtained by the scanning radar chip are processed to identify targets within the monitored region. Targets are tracked and profiled indicating their posture and fall detection rules are applied. Standard energy profiles and time dependent energy profiles are generated for various segments of the monitored region and compared to the current energy profile for each target segment of the monitored region. Anomalies are detected, false fall alerts filtered out and verified fall alerts are generated.

A terahertz security inspection robot is provided, including: a housing including a main housing and a head housing rotatably connected to the main housing; a terahertz wave imaging mechanism including a mirror assembly arranged in the head housing and a detector array arranged in the main housing; and a rotating mechanism configured to cause the head housing and the mirror assembly located in the head housing to rotate with respect to the main housing, so that the mirror assembly of the terahertz wave imaging mechanism is oriented in different directions to respectively perform terahertz scanning and imaging on objects to be inspected in different inspection regions in a security inspection scene.

A sensor assembly for a vehicle includes a base, a sensor body mounted to the base and rotatable relative to the base around an axis in a direction of rotation, and a cover. The sensor body includes a sensor window and a wall having heat fins elongated circumferentially relative to the axis. The cover is positioned to cover the heat fins. The cover includes an inlet open in the direction of rotation. The cover defines an airflow path from the inlet through the heat fins. The cover includes an outlet positioned to direct air across the sensor window.

An RF imaging receiver using photonic spatial beam processing is provided with an optical beam steerer that directs the modulated optical signals to steer the composite optical signal and move the location of the spot on the optical detector array. The optical beam steerer may be implemented with one or more phase-dependent steering units in which each unit includes a waveplate and polarization grating to steer the modulated optical signals. The optical beam steerer may be configured to act on the individual modulated optical signals to induce individual phase delays that produce a phase delay with a linear term, and possibly spherical or aspherical terms, to steer the composite optical signal in which case the optical beam steerer may be implemented, for example, with an optical phase modulator and optical antenna in each optical channel which together form an OPA, a Risley prism or a liquid crystal or MEMs spatial light modulator.

An RF imaging receiver using photonic spatial beam processing is provided with an optical beam steerer that directs the modulated optical signals to steer the composite optical signal and move the location of the spot on the optical detector array. The optical beam steerer may be implemented with one or more phase-dependent steering units in which each unit includes a waveplate and polarization grating to steer the modulated optical signals. The optical beam steerer may be configured to act on the individual modulated optical signals to induce individual phase delays that produce a phase delay with a linear term, and possibly spherical or aspherical terms, to steer the composite optical signal in which case the optical beam steerer may be implemented, for example, with an optical phase modulator and optical antenna in each optical channel which together form an OPA, a Risley prism or a liquid crystal or MEMs spatial light modulator.

Systems and methods for calibrating a radar sensor based upon synthetic aperture radar (SAR) principles are described herein. A relative motion is induced between a radar sensor and a calibration target in the field-of-view of the radar sensor. The radar sensor receives returns from the calibration target. The radar sensor outputs, based upon the relative motion between the radar sensor and the calibration target, detections that are indicative of locations of points on the calibration target. A computing system generates calibration data based upon the detections, the calibration data comprising a correction factor between a position measured by the radar sensor and a corresponding true position of an object. The computing system programs the radar sensor based on the calibration data such that subsequent to being programmed, the radar sensor outputs detections based upon radar returns and the calibration data.

A method for detecting, localizing, reporting, and displaying potholes on a road, in a system comprising a sensing device mounted on a vehicle, a cartography display, and a control unit, the sensing device comprising at least a radar device, the method comprising scanning with the sensing device an area of interest in front of and ahead the vehicle, the area of interest including at least a surface of a road traveled by the vehicle, the sensing device outputting a data flow; identifying first candidate potholes formed on the road surface; further processing the data flow to find out first confirmed potholes among the first candidates potholes; allocating a geolocation to each of the first confirmed potholes; and displaying, on the cartography display, first potholes with their localization superimposed on the map.

Aspects of the present disclosure are directed to radar transmissions and related componentry. As may be implemented in accordance with various embodiments, radar signals are generated and transmitted using both scanning and fixed beam analog signal codes concurrently/as combined for each radar signal. Reflections of the radar signals from a target are processed for ascertaining positional characteristics of the target.