9results about How to "Eliminate random errors" patented technology

This invention relates to a method, system, and medium for measuring the spatial parameters of a monocular target object based on a 2D camera. The method includes: acquiring a calibration board image and an original distorted image captured by the 2D camera; calibrating the calibration board image using a calibration algorithm to obtain calibration parameters; correcting the original distorted image using the calibration parameters to obtain a corrected image; performing target detection; and outputting the external contour and target contour feature points of the target object; classifying the target contour feature points into upper boundary feature points and lower boundary feature points; calculating the relative distance between the target object and the 2D camera based on the lower boundary feature points and the calibration parameters; and performing curve fitting on the upper and lower boundary feature points and the lower boundary feature points, respectively, and calculating the actual height of the target object based on the calibration parameters. Compared with existing technologies, this invention has advantages such as improved measurement accuracy and adaptability to complex boundary targets.

The utility model relates to glass steel product assembly technical field, concretely relates to a kind of positioning tool for positioning column center distance assembly, the positioning column at least two, the parallel arrangement between the positioning column, the positioning tool includes connecting sleeve head and connecting rod, the connecting sleeve head one end is matched with positioning column, and the other end is provided with connecting rod;The clearance fit between the connecting sleeve head and positioning column, the positioning column includes column stem, protruding portion and column head from below to above in order, the width of protruding portion is greater than the width of column head, and the width of column head is greater than the width of column stem;The bottom of connecting sleeve head is provided with positioning slot, and the positioning slot is matched with column head, and at least two connecting sleeve heads are provided on the connecting rod.The utility model is convenient and fast, and positioning accuracy is high, reduces random error, improves assembly efficiency and assembly qualification rate, meets the requirement of product batch consistency, with remarkable engineering application value.

The application discloses an optical receiving end bandwidth test method, system and related equipment, which first performs coarse scanning by a first sweep frequency step and divides the amplitude-frequency response area, then determines a smaller second sweep frequency step according to the transition core area attenuation slope, adopts differential sampling in different areas, effectively reduces frequency point redundancy, shortens test time consumption, accurately captures the amplitude-frequency rapid attenuation characteristics, balances test efficiency and accuracy, and adapts to production line batch test requirements. By combining real-time signal-to-noise ratio adjustment sampling time and Fourier transform average number, the influence of various interference factors can be inhibited; by peak detection, roll-off characteristic determination, matching of a suitable low-pass model for global fitting, random sampling errors can be eliminated, the standard amplitude-frequency response curve can be fitted to the actual characteristics, and the stability and repeatability of bandwidth determination are improved. The method realizes accurate, efficient and stable test of the optical receiving end bandwidth through the organic combination of adaptive non-uniform sweep frequency and model fitting, and improves the test performance.

The utility model provides a kind of three-dimensional compression bag 1, 4, comprising: sealed cavity: by top layer 51, 61, bottom layer 52, 62 and peripheral surface layer 53, or symmetrical side layer 63A, 63B are enclosed and sealed connection formation;Wherein, the peripheral surface layer 53 is sequentially arranged between the top layer 51 and the bottom layer 52 around;Or the side layer 63A, 63B is symmetrically distributed in the top layer 61 and the bottom layer 62 two sides, the top layer 61 extends to the bottom layer 62 around connection;Peripheral surface layer 53 in the utility model is sequentially constituted with a surface layer material, so when sealing assembly is arranged in peripheral surface layer 53, air-tight zipper 2 can be arranged in at least two sides, so that air compression bag opening is more open, and it is convenient for user to take and place article.

The application discloses a system automatic clock calibration method, device and system terminal and a metering box, and relates to the technical field of clock calibration. The method comprises the following steps: querying time synchronization information groups recorded by electric energy meters in a transformer area; calculating clock errors of the electric energy meters at various temperature points according to the time synchronization information groups; and performing clock calibration on the electric energy meters based on the clock errors. Through system time collection and then according to the logic of calculating target clock errors according to temperature, real clock deviations under different temperatures can be accurately matched, the problems of over-calibration under low temperature and insufficient calibration under high temperature can be avoided, the accuracy of the electric energy meter clock can be effectively improved, and error accumulation caused by temperature change can be reduced. Through systematic data processing and analysis, the calibration process is further optimized, and the overall efficiency is improved.

The utility model discloses a kind of sieve on material collecting devices, which comprises shell, sieve and filter screen: ultrasonic pool is formed in shell, ultrasonic pool is used to hold ultrasonic wave conducting medium, first outlet is also formed in communication with ultrasonic pool on shell;Sieve is set in ultrasonic pool and is inserted in first outlet, sieve is formed with through filter channel in it;Filter screen is set in filter channel. Compared with traditional manual sampling, the device breaks through the limitation of sieve on material spatial distribution heterogeneity, ultrasonic treatment forces dispersion of different particle sizes, filter screen retains sample complete representation of overall material characteristics, eliminates random error caused by force, angle difference of manual spoon, ensures that battery material coating uniformity evaluation, recovery metal separation efficiency detection and other key data have high repeatability and comparability.

This application relates to the field of intelligent manufacturing technology and discloses an intelligent adaptation method and system for non-standard fixtures of tube adapters. It aims to solve the problems of traditional fixtures having fixed structures, relying on manual experience for clamping parameters, and resulting in deformation of thin-walled parts and low changeover efficiency due to rough clamping force control. The method includes: acquiring workpiece point cloud data through three-dimensional visual perception; analyzing geometric features and matching clamping datum; automatically calculating the optimal clamping point distribution and clamping parameters; driving the flexible fixture to perform positioning; controlling the clamping force based on pressure feedback closed-loop control; and verifying the pose accuracy through secondary scanning. By adopting the above technical solution, this application can achieve highly flexible, high-precision, and automated clamping, effectively preventing workpiece deformation and improving changeover efficiency and the level of intelligent production.

This invention provides a method, system, device, and medium for calculating the coordinates of equal-length tower legs of portal towers for power grid digitalization, relating to the field of digital design technology for transmission lines. The method includes: acquiring the tower location path parameters and portal tower design parameters, wherein the path parameters include the center coordinates of the current tower location and adjacent tower locations, and the line turning angle; using a preset coordinate axis as a reference, calculating the azimuth angle using the coordinates and combining it with the line turning angle to perform directional normalization processing on the tower location, obtaining the normalized turning angle; calculating the center coordinates of the left and right sub-towers of the portal tower based on the tower location center coordinates, sub-tower spacing, and normalized turning angle; and finally, combining the tower leg root opening parameters, using a geometric solution model to calculate the corner coordinates of each sub-tower leg. This invention achieves automated and high-precision calculation of portal tower coordinates, significantly improving design efficiency and quality, and strongly supporting the digital transformation of power grid engineering.

The present application relates to the technical field of three-dimensional modeling, and particularly relates to a three-dimensional modeling method of a twisted blade sawtooth structure and a related device thereof; the method comprises the following steps: obtaining a middle surface of a three-dimensional entity model of a twisted blade; drawing a two-dimensional profile curve of a single period sawtooth on the middle surface; performing geometric extension of the two-dimensional profile curve along a normal direction of the middle surface, and generating a three-dimensional sawtooth boundary which is fitted to a blade surface through geometric intersection operation with the blade entity; generating a single sawtooth structure based on the three-dimensional sawtooth boundary; and taking a path on the middle surface as a guide, arraying the single sawtooth structure to complete modeling of the entire sawtooth structure. Through taking the blade middle surface as a unified geometric reference, combining normal extension-Boolean intersection and adaptive arraying, the problems of poor fitting accuracy, difficulty in guaranteeing direction consistency and low modeling efficiency when constructing a sawtooth structure on a complex twisted surface are solved, and high-precision and high-efficiency automatic modeling is realized.