21results 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 application provides a kind of pipeline medium pressure non-contact measurement method and device based on ultrasonic surface wave, the method is by fixing ultrasonic surface wave transceiver module TRA and ultrasonic surface wave transceiver module TRB on the pipeline to be detected, parallel to the central axis of the pipeline to be measured;Start the measurement program of industrial computer, and set the measurement threshold;Get the ultrasonic surface wave propagation time t0 in zero pressure state;The pressure value P of real-time pipeline medium is calculated by the pressure calculation formula based on thickness correction index, and the final pressure value is obtained after averaging;The application can realize high-precision and high-accuracy non-contact measurement of pipeline medium pressure, the detection resolution is greatly improved, and the ultrasonic surface wave only propagates in the surface layer of the pipe wall, the signal transmission loss is small, is not affected by the nature of the medium inside the pipeline, can effectively improve the accuracy of measurement results, can be used for electric vehicle related facility manufacturing, realizes high-accuracy non-contact measurement of pipeline fluid pressure measurement.

The application relates to the technical field of material performance test tooling equipment, and particularly discloses a positioning type sample placing table, which comprises a transfer trolley, a sample placing table, a sample positioning assembly, a loading chain, a sample, a positioning frame and a trolley positioning assembly; the sample placing table is arranged on the top of the transfer trolley, the sample positioning assembly is arranged on the top of the sample placing table, and the trolley positioning assembly is arranged on the positioning frame; the outer side of the loading chain is provided with a positioning ring, and the sample is connected with the loading chain. The positioning type sample placing table is provided with a double-positioning structure, can significantly improve sample installation consistency and robot grasping success rate, has the advantages of automatic connection, AGV circulation adaptability, convenient operation, accurate positioning, and is suitable for sample automatic placement and full-process unmanned operation of an intelligent high-temperature tensile test system.

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 invention discloses a precision manufacturing method for an integrated structure of a harmonic reducer, and particularly relates to the technical field of harmonic reducer manufacturing, comprising the following steps: S1, process decision and optimization; s2, preparing a gradient material of the flexible gear ring; s3, establishing a reference; s4, rigid wheel cooperative running-in; s5, carrying out collaborative processing by a wave generator; s6, assembly integration and in-place fine adjustment are carried out; s7, pre-tightening solidification and healthy fingerprint implantation; and S8, collecting and associating initial health information. According to the method, random errors caused by part tolerance accumulation are fundamentally eliminated through'digital twinborn model reverse optimization 'and'collaborative running-in based on unified reference', so that key performance indexes of products not only reach a tip level in absolute value, but also are highly consistent in batches, and the product quality is improved. And the contradiction between wear resistance of the tooth part and fatigue resistance of the root part is broken from the material level, and fatigue crack initiation can be obviously delayed, so that the service life of the whole machine stably breaks through and exceeds that of imported same-grade products.

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 invention provides a device and a method for measuring the cellulose content of straw, and the device comprises a positioning mechanism which is arranged on a rack and fixes a transverse slice of the straw at a preset position; the first rotary driving part is arranged on the rack; the bearing frame is connected with the first rotary driving part; the flattening mechanism is arranged on the bearing frame and used for applying flattening pressure to the transverse cutting sheet; the moisture detection unit is integrated on the contact surface; the pesticide applying mechanism is arranged on the bearing frame and applies a cellulose developing reagent to the surface of the transverse slice; the image acquisition unit is arranged on the bearing frame; the processor is configured to receive the surface water content information and the color developing image, calculate the cellulose area proportion based on the color developing image, perform compensation correction on the area proportion based on the surface water content information, and calculate the cellulose content of the cross section based on the corrected area proportion; and the first rotary driving part drives the bearing frame to rotate, so that the flattening mechanism, the pesticide applying mechanism and the image acquisition unit directly face the transverse cutting sheet in sequence. The device realizes the unification of high efficiency and high precision.

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 utility model discloses an on-line automatic cigarette recycling system for defective cigarette cartons, and relates to the field of automation of the tobacco industry. The recycling system comprises a cigarette carton disassembling system, a posture adjusting system, a cigarette box disassembling system and a cigarette sorting system. The cigarette disassembling system achieves cigarette positioning, annular cutting and stripping through a longitudinal cutting annular cutter, a transfer table and a cigarette box tearing device. The posture adjusting system is used for adjusting the posture of the boxed cigarettes and compacting the cigarettes by using a rotary pressing wheel, a guide groove, a visual inspection mechanism and the like; the box cigarette disassembling system completes three-face cutting and package disassembling of box cigarettes through a transverse moving mechanism and a cutting station. According to the cigarette sorting system, sorting, removing and storing of cigarettes are achieved by means of a plate pushing step feeding device, a visual detection mechanism and an air cylinder. The full-process unmanned operation from cigarette disassembling to cigarette stacking is achieved, the sorting and recognizing accuracy is high, precision, adaptability and economical efficiency are high, the equipment expandability is high, and the full-process unmanned cigarette disassembling machine is suitable for disassembling requirements of cigarette boxes of different specifications.

The invention relates to a detection device for battery case production, which comprises a base and an upper cover plate which is arranged above the base and is driven by a driving mechanism to slide, the bottom of the upper cover plate is provided with an extrusion mechanism for extruding a battery case, and the top of the base is provided with a positioning mechanism for positioning the battery case; the invention relates to the technical field of battery shell production. According to the detection device for battery case production, when the detection device is pressed downwards, gas in the main air bag which is firstly pressed can be pressed into all the side air bags around to enable the side air bags to expand, so that secondary wrapping and flexible pressurization sealing of the air bags on the edge of a battery case are realized on the basis of initial positioning of the rigid frame. According to the double-sealing mode of rigid positioning and flexible filling, the workpiece size differential error and surface unevenness are effectively compensated, the sealing uniformity and reliability are ensured, and the leakage false alarm rate is greatly reduced.

The present application belongs to the technical field of substation grounding grid monitoring, and discloses a real-time safety monitoring system for a substation main grounding grid based on multi-sensor fusion. A dynamic association database module adopts a mixed architecture of MySQL and InfluxDB to store static data such as the location of the substation and the material of the grounding grid, and dynamic data such as soil parameters and corrosion rates. A soil parameter and sampling frequency dynamic mapping table is built in to send a sampling frequency adjustment instruction to the sensor array module and start the soil sample automatic collection device when the soil salinity is greater than 15 mS / cm or the pH is less than 5.5. The module also establishes a material corrosion digital twin model and a climate zoning library to provide scenario data for the scheme dynamic adaptation and operation and maintenance module, so that it can output an adaptive scenario corrosion prevention scheme, and calculate the grounding electrode replacement cycle according to the corrosion rate to build a dynamic association between soil working conditions and corrosion protection, effectively improving the durability of the grounding grid.

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.

The invention discloses a lens diopter and microstructure detection device and method based on a mechanical switching structure, the lens diopter and microstructure detection device comprises a support table, a focusing assembly and an imaging assembly, the focusing assembly and the imaging assembly are both mounted on the support table, the imaging assembly comprises a Hartmann diaphragm assembly and a microscopic measurement assembly, and the Hartmann diaphragm assembly and the microscopic measurement assembly are mounted on the support table. The Hartmann diaphragm assembly and the microscopic measurement assembly are connected with the support table through the mechanical switching assembly, and a lens to be measured is arranged between the Hartmann diaphragm assembly and the focusing assembly or between the microscopic measurement assembly and the focusing assembly. Aiming at the problem that the precision is uncontrollable due to the fact that the optical center and the geometric center of the microstructure area of the current microstructure lens cannot be positioned at the same time, the quality of the microstructure lens and the accuracy of an inspection mechanism are expected to be improved.

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 application provides a method and system for automatic hanging of a suspension by three-dimensional vision measurement, the method comprising the following steps: collecting images of targets in an aircraft cabin, and obtaining pose information related to an actual suspension and an aircraft rack; based on the pose information, calculating pose deviation of a bomb loading vehicle relative to a design axis of the aircraft cabin in horizontal, vertical, pitch and rotation directions, and controlling a lifting device to move cooperatively with a six-degree-of-freedom platform to adjust the spatial position and attitude of the actual suspension, so that the suspension lug and the hook of the aircraft rack are precisely connected, and automatic hanging is completed. The method accurately measures targets in the aircraft cabin, can obtain the pose information of the suspension and the rack in real time and with high precision, and calculates accurate pose deviation. Based on the deviation, the lifting device and the six-degree-of-freedom platform move cooperatively to automatically and accurately adjust the spatial position and attitude of the suspension, and finally realize precise connection of the lug and the hook.

The application provides a building component processing technology intelligent labeling method, equipment and medium, and belongs to the technical field of BIM data processing. The method comprises the following steps: obtaining a building component three-dimensional model to be labeled and corresponding processing technology information; performing structural processing on the processing technology information to obtain an attribute set associated with the building component three-dimensional model; identifying the building component three-dimensional model, extracting geometric feature points, and calculating the geometric attributes of the geometric feature points; based on the geometric attributes, the geometric feature points are matched and bound with the processing technology information in the attribute set through a preset semantic rule to generate labeling data; the abstract graphic data is converted into four types of feature points of "shape, position, direction and surface texture" with engineering semantics by recognizing the geometric feature points, random errors caused by manual point selection are eliminated, and the consistency of processing and assembly positioning reference is ensured.

The application relates to the technical field of shield slag measurement, and discloses a real-time measurement method and system for the slump degree and water content of shield slag, the method comprising the following steps: a sensing assembly acquires resistance information of shield slag; a signal processing unit receives environmental data of a shield slag belt conveyor, and processes the environmental data and the resistance information to obtain standardized multidimensional data; a data conversion module performs data shunting on resistance impedance digital values and belt speed digital values in the standardized multidimensional data, performs inverse discrete Fourier transform on the frequency domain components to obtain a reflection coefficient and an attenuation coefficient, calculates a dielectric constant according to the reflection coefficient and the attenuation coefficient, calculates the water content of the slag according to the dielectric constant, inputs time domain amplitude and the belt speed digital values into a nonlinear regression model, and outputs a slag slump degree value; and a display terminal displays the slag slump degree value and the water content of the slag. The application can solve the data lag problem and improve the accuracy and reliability of the slag state data.

The invention provides a scanning type particulate matter accumulation thickness measuring system and method for a wind tunnel test. The scanning type particulate matter accumulation thickness measuring system for the wind tunnel test comprises a measuring device, and the measuring device is arranged above a to-be-measured model; the measuring device comprises a guiding structure, a telescopic structure and a distance measuring structure, the guiding structure is arranged in the horizontal direction and can cover a to-be-measured model, the first end of the telescopic structure is movably connected with the guiding structure to move along a preset track, the second end of the telescopic structure can reciprocate in the vertical direction, and the distance measuring structure is arranged at the second end. The distance measuring structure is used for measuring vertical distances between different positions of the surface of the to-be-measured model and the distance measuring structure. The distance measuring structure is controlled to scan and measure the to-be-measured model along the preset track, and point-by-point difference calculation is performed on the distance data before and after the wind tunnel test, so that particulate matter accumulation thickness distribution can be obtained. According to the scheme, automatic, non-contact and continuous scanning measurement is realized, and the measurement efficiency and the measurement precision are greatly improved.

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.