8results about How to "Exact width" patented technology

The invention discloses a time interval error jitter extraction method based on Hilbert transform, and relates to the field of high-speed data signal processing. After obtaining the measured data signal, firstly, a level histogram is used for statistics, and a corresponding level judgment reference is determined; secondly, the measured data signal is subjected to Hilbert transform to obtain the time information of the transition edge of the measured data signal; a "coarse frequency estimation + fine frequency estimation" method is used to extract the accurate symbol rate of the measured data signal, and a high-precision constant frequency clock is recovered; and high-precision time interval error is extracted according to the above-mentioned recovered clock. The time interval error jitter extraction method based on Hilbert transform provided by the invention provides a basis for high-precision time interval error jitter, and accurately performs jitter measurement on the measured data signal.

The present invention belongs to the technical field of non-destructive testing signal processing, and in particular, relates to a defect size quantification method. The defect size quantification method detects the defects of the insulating component to be tested by a rectangular dual-electrode sensing device, and obtains the first-order derivative of the obtained detection signal, so as to accurately judge the length and width parameter size of the defect of the insulating component to be tested. A defect size quantification method includes the following steps: determining the performance parameters of the electrode sensing device used in the defect size quantification method; scanning and detecting the insulating component to be tested along a direction to obtain a one-dimensional line scanning signal; deriving to obtain a first-order derivative signal; scanning and detecting the insulating component to be tested along a direction to obtain a one-dimensional line scanning signal; deriving to obtain a first-order derivative signal; judging whether there is a concave area in the one-dimensional line scanning signal and the one-dimensional line scanning signal.

The utility model provides an automatic grooving machine for heat preservation core material processing, belongs to the technical field of grooving processing, and solves the technical problems that an existing grooving machine cannot perform positioning grooving at different depths and cannot perform dust collection on grooving rock wool powder. An automatic grooving machine for heat preservation core material processing comprises a portal frame and a base fixed to the bottom end of the portal frame, the surface of the base is fixedly connected with a bottom frame, and the upper portion of the bottom frame is connected with a lifting table through a lifting assembly. According to the grooving machine, under the action that the lifting table is arranged in the portal frame in a lifting mode and the grooving assembly is arranged above the lifting table, the grooving machine can conduct grooving machining of different depths on the heat preservation core materials on the surface of the lifting table, through reciprocating motion of the grooving assembly, the grooving structure is stable, grooving accuracy is guaranteed, and meanwhile the grooving efficiency is improved. And the suction head is arranged on the outer side of the milling cutter, so that the suction head can adsorb and collect rock wool powder generated by grooving.

The invention discloses a method for preventing crack propagation of a nickel-plated layer on a rotor yoke assembly through laser surface modification, and belongs to the technical field of surface treatment of rotor yoke assemblies of small and medium-sized motors. According to the method, laser surface cladding is carried out near the weld joint fusion line, cracking or crack propagation of a nickel layer on the fusion line is avoided, the cladding area can be accurately controlled, and the machining cost is controlled. By adopting a laser welding method, the width and depth of a fusion area can be accurately controlled, and a laser surface cladding area can be accurately controlled. Workpiece deformation caused in the laser surface cladding process can be effectively avoided.

The application discloses a channel scratch depth and width determination method based on speckle domain Gaussian distribution fitting. The method is characterized in that a light guide beam and a camera are cooperated with coherent laser illumination to explore a channel, original laser speckle images in the channel are collected, Gaussian distribution fitting of speckle domains is carried out through drawing a straight line vertical to a scratch in the image, and the depth and width of the target scratch are determined. The scheme provided by the application can be applied to a specific endoscope pipeline diameter, and the depth and width of the scratch can be effectively determined.

The application discloses a machine vision target positioning method and system based on boundary frame self-adaptive adjustment, relates to the technical field of target detection and positioning, and comprises the following steps: acquiring real-time images and depth images of a current monitoring environment; inputting the real-time images into a light-weight target detection model based on an improved YOLO, identifying targets in the images and extracting target boundary frames; aligning the real-time images and the depth images, determining the depth value of each pixel point according to the coordinates of each pixel point in the target boundary frame region; based on the depth value of each pixel point in the target boundary frame region, using an adaptive width and distance measurement algorithm to distinguish target regions and background regions in the target boundary frame region, extracting the overall depth value of the target regions, determining the target distance and the target position, re-identifying the boundaries around the targets in the target boundary frame region, determining the target width and height, and thus completing target positioning. The application can realize more accurate and reliable acquisition of target positioning information.

The utility model discloses a kind of blade width auxiliary acquisition appliances, comprising: first plate body, the first plate body is used to attach to the outer surface of blade;Reference window with pre-known length size is opened on the first plate body, the length of the reference window corresponds with the width of the blade, the reference window is used to expose the widest area of blade including two sides;The surface color of the first plate body is different from the surface color of the blade.Because the length size of reference window is known, thus, with reference window as reference based on the proportion of blade relative to reference window, the width of blade exposed in reference window can be obtained more accurately, so that the influence of shooting angle, shooting position and image size on blade width is less.