A method for recognizing an object located in an object space includes emitting a distance measuring pulse into the object space by a signal time-of-flight based distance measuring unit. The object is provided with a marker which, in response to the influence of the distance measuring pulse, emits electromagnetic marker radiation in which object information for the object recognition is stored. The method further includes recording the marker radiation by an electrical radiation detector and the object information for object recognition being assigned to the object.

A method for recognizing an object located in an object space includes emitting a distance measuring pulse into the object space by a signal time-of-flight based distance measuring unit. The object is provided with a marker which, in response to the influence of the distance measuring pulse, emits electromagnetic marker radiation in which object information for the object recognition is stored. The method further includes recording the marker radiation by an electrical radiation detector and the object information for object recognition being assigned to the object.

A system and method for detecting a rotary wing aircraft. A return electromagnetic signal, reflected by a rotary wing aircraft, is received through an electromagnetic signal detection apparatus. The aircraft includes a plurality of propeller blades attached to at least one motor. At least one propeller blade has at least one portion with a reflectivity different from other portions. A first time series data of the return electromagnetic signal is received. A second time series data is determined based on the first time series data and a predefined threshold. A characteristic of the second time series data is used to determine whether it corresponds to the known aircraft.

A system and method for detecting a rotary wing aircraft. A return electromagnetic signal, reflected by a rotary wing aircraft, is received through an electromagnetic signal detection apparatus. The aircraft includes a plurality of propeller blades attached to at least one motor. At least one propeller blade has at least one portion with a reflectivity different from other portions. A first time series data of the return electromagnetic signal is received. A second time series data is determined based on the first time series data and a predefined threshold. A characteristic of the second time series data is used to determine whether it corresponds to the known aircraft.

Provided is a light detection and ranging (LiDAR) device including an illuminance sensor configured to detect illuminance of light received by the LiDAR device, a photodiode array including a plurality of photodiodes that are connected in parallel, the plurality of photodiodes being configured to generate a current based on the light received, and a processor configured to determine a number of photodiodes included in the photodiode array to be activated based on the illuminance and activate the determined number of photodiodes.

Provided is a light detection and ranging (LiDAR) device including an illuminance sensor configured to detect illuminance of light received by the LiDAR device, a photodiode array including a plurality of photodiodes that are connected in parallel, the plurality of photodiodes being configured to generate a current based on the light received, and a processor configured to determine a number of photodiodes included in the photodiode array to be activated based on the illuminance and activate the determined number of photodiodes.

A spatial recognition device provided with an analysis unit configure to acquire, from an optical device, which is mounted on a moving body and which receives reflected light obtained by radiating light onto a reflective plate provided on a stationary structure positioned within a detection area, reflected light information obtained based on the reflected light in accordance with a radiation direction of the light, and determine a positional relationship between the moving body and the stationary structure on which the reflective plate is provided, based on a distribution of the reflected light information at coordinates within the detection area.

A spatial recognition device provided with an analysis unit configure to acquire, from an optical device, which is mounted on a moving body and which receives reflected light obtained by radiating light onto a reflective plate provided on a stationary structure positioned within a detection area, reflected light information obtained based on the reflected light in accordance with a radiation direction of the light, and determine a positional relationship between the moving body and the stationary structure on which the reflective plate is provided, based on a distribution of the reflected light information at coordinates within the detection area.

Aspects of the disclosure are directed to acquiring aligned geographic coordinates of a vertical position. In one aspect, a vertical navigation system includes a light source to generate a source beam; a beam splitter to generate a first and a second source references derived from the source beam; a hollow retroreflector to produce a first and a second vertical references derived from the first and the second source references; an attitude sensor to capture a plurality of reference stars and to measure a first set of angles for the first vertical reference and a second set of angles for the second vertical reference, the first set of angles and the second set of angles are relative to the plurality of reference stars; and a processor to produce the aligned geographical coordinates using the first set of angles, the second set of angles, a gravity vector measurement and a time signal.

This disclosure, and the exemplary embodiments provided herein, include a system and method for encoding information in a relatively dense and time-varying manner. In exemplary embodiments, a reflector or retroreflector is wrapped around a rotating member, such as a cylinder, (also referred to as “Rotational LIDAR Barcodes”), which encodes relatively longer data messages, as compared to a static barcode, which can be detected by a LIDAR system and decoded from every direction, i.e. bearings angles of 0-360 degrees, even when partially obstructed.