The invention relates to a method for detecting a screening of a sensor device (4) of a motor vehicle (1) by an object (8), in which at least one echo signal, captured by the sensor device (4), that characterizes a spacing between the sensor device (4) and the object (8) is received (S1) by means of a computing device (3), a capture region (E) for the sensor device (4) is determined, and on the basis of the at least one received echo signal it is checked whether the capture region (E) of the sensor device (4) is being screened by the object (8), at least in some regions, wherein the at least one echo signal is assigned by means of the computing device (3) to a discrete spacing value (B1, B2, B3) from a plurality of discrete spacing values (B1, B2, B3), for each of the discrete spacing values (B1, B2, B3) a power value (P) is determined (S2) on the basis of the echo signal, and on the basis of the power values (P) a decision is made by means of a classifier as to whether at least a predetermined proportion of the capture region (E) of the sensor device (4) is being screened (S6) by the object (8).

Example embodiments relate to taking images at certain predetermined angles in order to have consistent exposure throughout the images. An example embodiment includes a method. The method includes determining, using a lidar device, light intensity information of a surrounding environment of the lidar device. The light intensity information includes a plurality of angles within a threshold range of light exposure. The method also includes determining rotation times associated with each of the angles within the threshold range of light exposure. Further, the method includes based on the rotation times associated with each of the angles within the threshold range of light exposure, determining a plurality of target image times. In addition, the method includes capturing, by a camera system, a plurality of images at the plurality of target image times.

An optoelectronic sensor (10) for detecting objects in a monitored zone (20) is provided which has the following: a front screen (38); a light transmitter (12) for transmitting a light beam (16); a movable deflection unit (18) for the periodic sampling of the monitored zone (20) by the light beam (16); a light receiver (26) for generating a received signal from the light beam (22) remitted by the objects; at least one test light transmitter (42); at least one test light transmitter (42), at least one test light receiver (44) and at least one test light reflector (48) which span a test light path (46a-b) through the front screen (38); and an evaluation unit (32) which is configured to acquire pieces of information on the objects in the monitored zone (20) from the received signal and to recognize an impaired light permeability of the front screen (38) from a test light signal which the test light receiver (44) generates from test light which is transmitted from the test light transmitter (42) and which is reflected at the test light reflector (48). In this respect, the test light reflector (48) is arranged such that it moves along with the deflection unit (18).

A return signal associated with a frequency modulated continuous wave (FMCW) optical beam is received. A correction for Doppler scanning artifacts in the return signal is made. A determination as to whether the return signal is caused by an obstruction on or proximate to a LIDAR window is made. A field of view (FOV) reflectivity map is generated based on the determination. The FOV reflectivity map is analyzed by identifying an obstructed FOV of the LIDAR system and determining a reflected energy from the obstructed FOV.

The present invention relates to the field of vehicle calibration and discloses a calibration system and a calibration bracket. The calibration bracket includes a base, a stand assembly and a beam assembly. The stand assembly includes a first upright rod and a second upright rod. One end of the first upright rod is detachably mounted on the base. The second upright rod is connected to the first upright rod. The first upright rod is nested or folded with the second upright rod to reduce the length of the stand assembly. The beam assembly is supported by the stand assembly. In the calibration bracket of the present invention, the first upright rod is detachably mounted to the base so that the base detaches from the first upright rod, thereby facilitating loading and handling of the calibration bracket. In addition, the first upright rod is adapted to be nested or folded with the second upright rod, which can reduce the length of the stand assembly and further facilitate the loading and handling of the calibration bracket.

A range finding system includes: an electromagnetic output to provide a first beam of electromagnetic radiation along a first beam path; an electromagnetic input to receive reflected electromagnetic radiation of the first beam from an object for determining a range of the range finding system from the object; and an enclosure including a side wall that surrounds a central axis of the enclosure, the side wall transparent to the electromagnetic radiation provided by the electromagnetic output. The electromagnetic output and electromagnetic input are disposed within the enclosure such that the electromagnetic input is located outside a second beam path of a second beam of electromagnetic radiation defined by a specular reflection of the first beam on the side wall. Since the electromagnetic input is located outside the second beam path, the specular reflection of the first beam off the side wall does not reach the electromagnetic input.

The present disclosure describes proximity sensor modules that include a time-of-flight (TOF) sensor. The module can include a plurality of chambers corresponding, respectively, to a light emission channel and a light detection channel. The channels can be optically separated from one another such that light from a light emitter element in the light emission chamber does not impinge directly on light sensitive elements of the TOF sensor in the light detection chamber. To achieve a module with a relatively small footprint, some parts of the TOF sensor can be located within the light emission chamber.

A light detection and ranging (LIDAR) system, includes an optical source to generate a frequency modulated continuous wave (FMCW) optical beam, a memory, and a processor, operatively coupled to the memory, to identify energy peaks in a frequency domain of a range-dependent baseband signal that corresponds to a return signal from a reflection of the FMCW optical beam and identify an obstruction of the LIDAR system based on a comparison of a frequency of the energy peaks to a threshold frequency.

A method for determining a distance offset between a depth map of an indirect time-of-flight measurement device and a reference ground truth map includes emitting emission optical radiation by an emission circuit of the indirect time-of-flight measurement device. The emission optical radiation is sequentially modulating by N modulation frequencies. N is greater than or equal to three. The method further includes receiving, by a reception circuit of the indirect time-of-flight measurement device, reception optical radiation generated by the emission optical radiation reflected off objects of a scene and by optical crosstalk between the emission optical radiation and the reception optical radiation, and estimating the distance offset based on the reception optical radiation.

A method for range determination for a LIDAR sensor. The method includes: receiving measured values of a LIDAR sensor organized in a point cloud, and each including pieces of directional information and radial distance information relative to the LIDAR sensor and representing a laser beam reflected from the particular direction and at the particular radial distance; assigning the measured values based on the pieces of directional and radial distance information to areas of interest of a field of view; ascertaining a maximum distance range as an area of interest including a maximum radial distance to the LIDAR sensor and a point distribution of measured values of the area of interest, which includes a variance which reaches or exceeds a predetermined limiting value; and providing a value of the radial distance of the maximum distance range to the LIDAR sensor as the maximum range of the LIDAR sensor.