5 results about "Y-Coordinate" patented technology

The application discloses a kind of experimental correction method and system of optical deformation of density interface in density stratified fluid, method steps: S1, obtains the continuous original image of spherical particle cross-interface, control adjacent image particle displacement is not more than average pixel radius, set particle falling direction as y axis positive direction;S2, select the image i before particle enters interface, get y coordinate by profile, build the mapping array of corrected y' and original y;S3, select the i+n (n≥1, indicate that it is processed n image) image, get y coordinate and particle center by profile, determine particle center correction position according to mapping array, obtain its corrected y' by formula for specific line, add mapping array;S4, repeat S3 to obtain complete mapping array;S5, according to complete mapping array, correct subsequent image.The application constructs mapping array in stages to realize accurate correction, and can improve the reliability of related experimental image measurement data.

The present application belongs to the field of base station calibration, and is a base station calibration method based on fusion of TOF and AOA method. A base station is selected as an original base station to establish a coordinate system. With the original base station as the origin, a first adjacent base station A is found in a counterclockwise or clockwise direction, the distance r between the original base station and the base station A is measured n , the spatial coordinates of the base station A are calculated, and the azimuth of the base station A to be determined is distinguished by azimuth. The distance r between the original base station and a base station B adjacent to the base station A is measured n , the azimuth and the pitch angle are calculated, the base station A and the base station B are projected onto the xoy plane of the original base station, a spherical equation is established, two sets of spatial coordinate solutions of the base station B are obtained by solving the spherical equation, and the azimuth of the base station B is used to determine the final solution. The calibration method improves the x and y coordinate accuracy of the base station. Through distance measurement of three base stations, mutual constraint is achieved, and the calibration accuracy is improved.

This invention discloses a method for JRC estimation based on Hausdorff distance. The method involves extracting the coordinates of 10 standard profiles of Barton's structural surfaces with a sampling interval of dx. Based on the extracted x and y coordinate data, the cumulative slope of each standard profile is calculated, forming a cumulative slope data sequence of standard curves. The structural surface curves are then measured in the field, and the coordinates of the measured curves are extracted with a sampling interval of dx. The cumulative slope of the measured curves is calculated, forming a cumulative slope data sequence of measured data. The Hausdorff distance between the cumulative slope of the measured curves and the cumulative slope of the standard curves is calculated. The standard profile of the structural surface most similar to the measured curve is identified, and its corresponding JRC value is assigned to the measured curve, ultimately estimating the JRC value of the measured curve. This invention achieves JRC value estimation based on the self-similarity of the cumulative slope of the curves, avoiding the arbitrariness and subjectivity in determining the JRC value caused by comparing visual observation with standard profiles.

An inspecting unit for use in a laser processing apparatus includes a camera configured to image a spot of a laser beam, and a processing unit configured to generate a light intensity at two-dimensional X-Y coordinates corresponding to a two-dimensional image imaged by the camera. The processing unit includes a determining unit configured to generate a three-dimensional approximate curve or an approximate curved surface such that the light intensity corresponding to the two-dimensional coordinates is set as a Z-coordinate, and determine that there is dirt, a flaw, or an abnormality in an optical system on an optical path on the laser oscillator side of a position at which the spot is imaged when a difference between the first light intensity of the Z-coordinate corresponding to the two-dimensional coordinates and a second light intensity indicated by the approximate curve or the approximate curved surface exceeds an allowable value.

A flame detection system is disclosed. The flame detection system includes one or more processors coupled to at least one flame detector and at least one image capture device. The one or more processors identify a location of the flame by determining a base Y-coordinate, a tip Y-coordinate, a leftmost X-coordinate, and a rightmost X-coordinate of a plurality of pixels associated with the flame; determining that the variation in the base Y coordinate of the most current image in the sequence of images is less than a predefined limit of the height of the flame; and determining that the change in the tip Y coordinate of the most current image in the sequence of images is greater than a predefined limit of the height of the flame, or the change in the leftmost X coordinate or the rightmost X coordinate of the most current image in the sequence of images is greater than a predefined limit of the width of the flame.