37 results about "Stars" patented technology

The invention discloses a method for fast star map recognition of the whole celestial sphere by a star sensor, which includes constructing a navigation feature library of the shape factor and angular distance value of the navigation triangle; according to the number of observed stars in the field of view of the star sensor, select the best The four observation stars form two target observation triangles; calculate the shape factor and angular distance value of the two target observation triangles, match them with the navigation feature library, and obtain the navigation triangle to be matched; according to the Navigate the triangle information, generate a reference star map of a local sky area, and perform star point matching on the reference star map and the current observation star map in four steps. It can reduce the requirement on the storage space of the navigation feature library. In the process of matching and recognition, the "unique" navigation triangle can be quickly found according to the characteristics of the observation triangle, which solves the problem of redundant navigation triangles in the traditional triangle method. The matching recognition time is short, the recognition success rate is high, and the robustness is good.

The invention relates to a total station and a star image star centroid extraction method thereof, By calculating the horizontal coordinates of the stars relative to the stations, the azimuth and altitude of the star, Based on the inverse transformation model of total station pixel coordinates and dial coordinates, Predicting the Initial Imaging Position of a Star, At that initial image position,Setting the range of star image processing and calculating star point centroid coordinates in this range, the star image of total station can be processed locally and effectively, avoiding the whole image processing, greatly shortening the time of star point centroid extraction, improving the efficiency of star point centroid extraction, and providing technical support for rapid astronomical measurement.

The invention discloses a method, a device and a telescope for quickly identifying a star. The identification method includes acquiring information on a star to be identified, and the information on the star includes a target angle coordinate; and adjusting the angle coordinate of a recognition device according to the target angle coordinate; Use the recognition device to capture the first starry sky image at the current angle coordinates; search the corresponding starry sky database to obtain the second starry sky image according to the target angle coordinates and the current field of view angle of the recognition device; compare the first starry sky image with the second starry sky image , identifying the star to be identified in the first starry sky image according to the comparison result. The telescope of the present invention does not need to be calibrated after starting up, and uses the starry sky database to simulate the current telescope, and compares the actual starry sky image with the simulated starry sky image to realize fast star searching, and compared with the composition star search method, the star recognition speed of the present invention and The accuracy rate is greatly improved.

The invention discloses a method for screening out false stars of a star sensor based on angular distance screening. The steps are: (1) recording all star points in the first frame star map as initial star points; (2) starting from the second frame , use the star tracking method to establish the corresponding relationship between each star point and the initial star point; (3) compare the angular distance between each frame and the initial frame, screen the angular distance according to the angular distance change, and update the angular distance screening matrix; (4) ) Use the star pairs corresponding to the screened angular distances to vote for each star point, and filter out the star points with too low number of votes; (5) Output the filtered star points for each frame and send them to the subsequent star map recognition module. The present invention has the following advantages: (1) the success rate of convergence is high, within 600 false stars, the success rate of convergence is above 98%; (2) the convergence speed is fast, and it only needs no more than 10 frames of star maps on average to screen out all false stars. False stars; (3) The ability to adapt to the number of false stars is strong, and all false stars can be screened out from the star map of up to 700 false stars; (4) The screening of false stars does not depend on the shape information of star points.