摘要:
A navigation system provides lane guidance for a navigation route. The navigation route specifies actions for a user to navigate a route from an originating point to a destination along a set of road segments. The lane guidance at a position along the navigation route scores the lanes and provides the lane scoring for the user. To score the lanes, the navigation system determines a lane distance for each lane indicating how far along the navigation route a user may continue to use this lane, without shifting to another lane. The lane distance may be measured up to a look-ahead distance. The lane distance includes distance along subsequent road segments of the route, such that when a lane turns onto a lane on another road segment according to the navigation route, the distance along the other road may be included in the lane distance.
摘要:
A zero-optical-path-length-difference optical phased array built with essentially planar photonic devices determines a direction to an incoherent optical source, such as a star. The phased array can replace a 3-dimensional star tracker with a nearly 2-dimensional system that is smaller and lighter. The zero-optical-path-length-difference phased array can be optically connected to an interferometer. Driven by a light source, the zero-optical-path-length-difference phased array can be used as an optical projector.
摘要:
The invention pertains to a method for geometric referencing of multi-spectral data in a sequence of images, the images containing distinct regions representing imaged radiation in respective distinct wavelengths, the method comprising: selecting a subset from the sequence of images, said subset containing a plurality of images, each image of which represents a field of view that overlaps with a field of view of at least one other image in the same subset; generating a 3D model by performing photogrammetric 3D reconstruction on the images in the subset; estimating a displacement and a yaw between pairs of successive images of said sequence of images; and using said 3D model and said estimated displacement and yaw to calculate photogrammetric parameters for images of said sequence of images that are not in said selected subset. The invention also pertains to a corresponding system and a corresponding computer program product.
摘要:
A tracking device for automatically following a moving light source that is detectable in the presence of ambient light. A carrier platform including one or more radiant energy conversion devices and a sensor array is mounted to an upright support column with a universal joint. Three independently-operated, linear actuators are equally angularly spaced about the support column with an upper end connected to the carrier platform with a universal hinge and a lower end connected to a floating base with a spherical hinge. A sensor array carried by the carrier platform includes a primary sensor associated with each actuator. During operation, when a primary sensor is not receiving direct radiant energy, the actuator retracts, and when it is receiving radiant energy directly, the actuator extends. The result is that the platform will directly track the sun across the horizon.
摘要:
An apparatus and system for use in determining location of a celestial body are presented. The apparatus comprises: a polarizer comprising an array of polarized light filter cells and a light sensor array. The array of polarized light filter cells comprises at least a first polarization direction and a second polarization direction different from said first polarization direction. And the polarizer thereby produces polarized light of at least first and second different polarizations. The light sensor array is configured to receive the polarized light from the polarizer and produce data indicative of a pattern of at least one of light polarization intensity and direction. The pattern is indicative of at least one of azimuth and elevation of the celestial body to be located.
摘要:
The present invention relates to a method of controlling an actuator for a mobile item of equipment in building comprising the steps consisting in: deploying a model (M) linking at least one modelling parameter (P) with at least one characteristic physical quantity (C) of the environment or of the operation of the actuator exhibiting a temporal evolution; collecting a set of measurement values (VCm) relating to the at least one characteristic physical quantity (C) of the environment or of the operation of the actuator in the course of a measurement interval (Tm), each measurement value (VCm) being associated with an instant (Tm) of the measurement interval (Tm); determining or correcting at least one value (VP) of the at least one modelling parameter (P) in such a way that a modelled temporal evolution (Ee) defined on the basis of the application of the model (M) of the at least one value (VP) of modelling parameter (P) corresponds to or approaches an observed temporal evolution (Eo) of the characteristic physical quantity (C) determined on the basis of the set of measurement values (VCm); applying or correcting a definition of the operation of the actuator (1) as a function of a determined or corrected value (VP) of the at least one parameter (P). The present invention also relates to an actuator implementing such a method.