3 results about "Position sensitive device" patented technology

The invention provides a rapid calibration method and system for angle measurement precision of a laser seeker. The method comprises the following steps: emitting a laser beam to a calibration rod array through a laser seeker, and collecting the displacement of a laser spot reflected by the surface of each calibration rod through a position sensitive device; inputting the laser spot displacement into a spot displacement feature extraction network, and generating an angle and displacement time sequence containing a timestamp; identifying abnormal sampling points in the angle and displacement time sequence; and performing geometric reconstruction on the abnormal sampling points by adopting a space geometric constraint optimization algorithm and combining a fixed space included angle constraint relation to obtain angle measurement error calibration parameters of the laser seeker. According to the technical scheme provided by the invention, the high-precision dynamic calibration of the angle measurement error of the laser seeker is realized through the collaborative analysis of the space coordinates of the calibration rod and the displacement of the laser spot in combination with the neural network and geometric constraint optimization.

A mechanism for tracking an approximate position of a desired light beam. An optical system is configured to derive one or more first positions of one or more incident light beams from data produced by a position-sensitive device and one or more second positions of one or more incident light beams from image data produced by an image sensing arrangement. A tracking system processes the first position(s) and the second position(s) to determine or identify a position of the desired light beam.

The application provides a kind of laser seeker angle measurement precision fast calibration method and system.Therein, the method includes: by laser seeker emitting laser beam to the calibration rod array, and by position sensitive device collection each calibration rod surface reflected laser spot displacement amount;The laser spot displacement amount is input into spot displacement feature extraction network, and the angle and displacement time sequence containing time stamp are generated;Abnormal sampling points in angle and displacement time sequence are identified;Using spatial geometric constraint optimization algorithm, combined with fixed space angle constraint relationship, abnormal sampling points are geometrically reconstructed, and the angle measurement error calibration parameter of laser seeker is obtained.The technical scheme provided by the application realizes high-precision dynamic calibration of laser seeker angle measurement error through cooperative analysis of calibration rod space coordinates and laser spot displacement, combined with neural network and geometric constraint optimization.