Apparatus and methods are provided for using a retroflected target for calibrating environmental geometric sensing systems. In particular, apparatus and methods are provided for unstructured calibrations using a plurality of spatial sensing data acquisitions and the data correlations thereof. In various implementations, a combined LiDAR-RADAR detector is used to associate one with the other. According to one aspect of the present disclosure, a predetermined LiDAR detector is used as a reference frame for RADAR segmentation. Specifically, a LiDAR point-of-interest is conveyed to RADAR system for unstructured calibration. To that end, RADAR and LiDAR can be calibrated with one another without the need for absolute positioning.

Apparatus and methods are provided for using a retroflected target for calibrating environmental geometric sensing systems. In particular, apparatus and methods are provided for unstructured calibrations using a plurality of spatial sensing data acquisitions and the data correlations thereof. In various implementations, a combined LiDAR-RADAR detector is used to associate one with the other. According to one aspect of the present disclosure, a predetermined LiDAR detector is used as a reference frame for RADAR segmentation. Specifically, a LiDAR point-of-interest is conveyed to RADAR system for unstructured calibration. To that end, RADAR and LiDAR can be calibrated with one another without the need for absolute positioning.

A system simultaneously tracks multiple objects. All or a subset of the objects includes a wireless receiver and a transmitter for providing an output. The system includes one or more wireless transmitters that send commands to the wireless receivers of the multiple objects instructing different subsets of the multiple objects to output (via their respective transmitter) at different times. The system also includes object sensors that receive output from the transmitters of the multiple objects and a computer system in communication with the object sensors. The computer system calculates locations of the multiple objects based on the sensed output from the multiple objects.

A system simultaneously tracks multiple objects. All or a subset of the objects includes a wireless receiver and a transmitter for providing an output. The system includes one or more wireless transmitters that send commands to the wireless receivers of the multiple objects instructing different subsets of the multiple objects to output (via their respective transmitter) at different times. The system also includes object sensors that receive output from the transmitters of the multiple objects and a computer system in communication with the object sensors. The computer system calculates locations of the multiple objects based on the sensed output from the multiple objects.

The present disclosure provides for systems and methods for quasi-static and dynamic characterization and adjustment of radio frequency aperture and transmission. The system may comprise a transmission structure with a plurality of sensors. The system may comprise a plurality of optical metric markers. The system may receive corrective signals, shape, or deflection knowledge, or any combination thereof, from an estimator to one or more controllers. The method may comprise association of distance measurements received from a plurality of sensors through physical system identification to plot cartesian coordinates in three-dimensional space as a function of time. When the system comprises one or more controllers, the controllers may be actuated in response to shape or deformation knowledge provided by the computation module. The estimator may comprise phase correction of a large array from sparse data that is then translated to controller actuation.

A reflective device for an optical measuring system and for arranging in a measuring object, including an optical deflection device and a retroreflector. The deflection device can deflect a light beam at the optical deflection device from an incident axis. The retroreflector can reflect the beam parallel to its incoming direction for each of various incoming directions of a light beam onto the retroreflector. The reflective device can be arranged in the measuring object such that a measuring beam of the optical measuring system, pointed at the measuring object and arriving at the optical deflection device in a first direction, is deflected by the optical deflection device onto the retroreflector in a different, second direction and, following reflection at the retroreflector, is deflected by the optical deflection device in reverse parallel to the first direction. An optical measuring system, a flying object and a flying object system are further described.

The present invention relates to an optical telemetry system for measuring the distance between two vehicles comprising a first optoelectronic assembly formed by at least one light source SL.sub.s and at least one photosensitive sensor CP+, which source and sensor are oriented towards in front of the vehicle, and a second optoelectronic assembly formed by at least one light source SL.sub.c (6) and at least one photosensitive sensor CP.sub.c (5) that is oriented towards behind the vehicle, characterized in that said light sources SL.sub.s and SL.sub.c are conventional light sources, the light source SL.sub.s being modulated by a signal of frequency F.sub.s, said light source SL.sub.c (6) of the target (4) being modulated by a clock of frequency controlled by a phase-locked loop driven by the electrical signal delivered by said photosensitive sensor CP.sub.c, said first optoelectronic assembly furthermore comprising a circuit for measuring the phase shift between the electrical signal delivered by said photosensitive sensor CP.sub.s (5) and the signal modulating the paired light source SL.sub.s (6), said system furthermore comprising a computer for determining the distance depending on the frequency F.sub.s and the measured phase shift. The invention also relates to an optoelectronic assembly for an optical telemetry system, to a vehicle equipped with such a system and to a telemetry method.

The present invention relates to an optical telemetry system for measuring the distance between two vehicles comprising a first optoelectronic assembly formed by at least one light source SL.sub.s and at least one photosensitive sensor CP+, which source and sensor are oriented towards in front of the vehicle, and a second optoelectronic assembly formed by at least one light source SL.sub.c (6) and at least one photosensitive sensor CP.sub.c (5) that is oriented towards behind the vehicle, characterized in that said light sources SL.sub.s and SL.sub.c are conventional light sources, the light source SL.sub.s being modulated by a signal of frequency F.sub.s, said light source SL.sub.c (6) of the target (4) being modulated by a clock of frequency controlled by a phase-locked loop driven by the electrical signal delivered by said photosensitive sensor CP.sub.c, said first optoelectronic assembly furthermore comprising a circuit for measuring the phase shift between the electrical signal delivered by said photosensitive sensor CP.sub.s (5) and the signal modulating the paired light source SL.sub.s (6), said system furthermore comprising a computer for determining the distance depending on the frequency F.sub.s and the measured phase shift. The invention also relates to an optoelectronic assembly for an optical telemetry system, to a vehicle equipped with such a system and to a telemetry method.

A laser measuring system is provided by combining N-beams, angle based modulation and a laser receiver and laser transmitter configured with corner reflectors for signal shift measuring to facilitate full three dimensional positioning.

A communication system provided in a working vehicle includes: an identification device that stores identification information; a communication device that outputs electric waves to communicate with the identification device; an ambient temperature judging unit that judges whether or not an ambient temperature of the environment in which the identification device is disposed exceeds an operational temperature at which an operation of the identification device is ensured; and a communication controller that prohibits the communication device from outputting the electric waves when the ambient temperature judges that the ambient temperature exceeds the operational temperature.