100 results about "Dimension measurement" patented technology

The invention relates to the technical field of large-size part three-dimensional measurement, and discloses a large-size part three-dimensional size measurement method and device based on machine vision, and the method comprises the steps: obtaining a material reflection characteristic reference data set and original point cloud data; according to the reference data set, laser power and gain are adjusted in a self-adaptive mode, and optimized scanning parameters are obtained; and performing denoising, feature extraction, region segmentation and plane fitting according to the optimized parameters and the original point cloud to obtain a high-precision geometric dimensioning result. According to the invention, high-precision, high-stability and high-efficiency three-dimensional size measurement can be realized on a large-size part made of a complex material and having a curved surface, and the three-dimensional size measurement method is obviously superior to a traditional scheme.

The invention relates to the technical field of size detection, and provides a size detection method, system and device and a medium, and the method comprises the steps: obtaining a shadow image of a to-be-detected workpiece, carrying out the gray conversion or binarization processing, and smoothing the image through a Gaussian kernel filter, so as to reduce the noise and enhance the edge information; performing edge detection by using an improved Canny operator to extract object contour pixel points, calculating by using an interpolation algorithm to obtain a higher-precision object contour image, gradually traversing the contour image according to a preset track and a reference template by means of a sliding window algorithm, and calculating similarity to select a target local area; and finally, finding the highest point and the lowest point of the object contour image in the target local area, and integrating the data of each target local area according to the height difference, thereby accurately obtaining the overall size of the workpiece to be measured, and improving the accuracy and convenience of size measurement.

The invention relates to the technical field of quality inspection, and particularly discloses an electronic grating quality inspection method and system based on digital twinning, and a medium, and the method comprises the steps: carrying out the three-dimensional modeling of an actual part in a standard form, and obtaining a digital twinning model of the actual part; carrying out quality inspection zoning on the surface area of the actual part based on the digital twinborn model of the actual part to obtain all appearance quality inspection areas of the actual part; detecting each appearance quality inspection area of the actual part by using a digital twin electronic grating group to obtain shape and size measurement data and surface defect detection data of each appearance quality inspection area of the actual part; based on the shape and size measurement data and the surface defect detection data of all the quality inspection areas of the actual part and the digital twinborn model, obtaining a quality inspection result of the actual part; accurate partition detection of a quality inspection object is realized, and visual visualization of a quality inspection result is realized by using digital twinning.

The present invention belongs to the field of dimension measurement technology, and specifically relates to a method, system, device, and medium for evaluating the uncertainty of a large-scale multilateral coordinate measurement system. The method inputs the acquired target point coordinates into an error transfer model to obtain three coordinate uncertainty components corresponding to the coordinate values. This uncertainty coefficient is then calculated based on the uncertainty introduced by the offset of the reflector's optical center, and the uncertainty evaluation is performed. The present invention, based on the fundamental principles of the multilateral coordinate measurement system, simplifies the system coordinate system to reduce parameters, thereby reducing the amount of calculations. The method also provides a specific mathematical formula, which facilitates rapid evaluation at the measurement site and is easy for metrologists to learn and apply.

The invention discloses a size measurement method, device and equipment and a storage medium, and relates to the technical field of industrial measurement, and the method comprises the steps: determining the coordinates of a to-be-measured point corresponding to current image data according to a target visual conversion model; when the special point locations exist in the point locations to be measured, the special point locations in the point locations to be measured are preprocessed, and the point locations to be measured are updated according to a processing result; and measuring the size of the to-be-measured product according to the updated coordinates of the to-be-measured point. Through the above mode, after the optical measurement equipment collects the current image data of the to-be-measured product, the coordinates of the to-be-measured point locations are determined based on the target artificial intelligence service equipment according to the target visual conversion model, whether special point locations exist in the to-be-measured point locations is judged, if yes, the size of the to-be-measured product is measured based on the geometric measurement strategy, and the measurement accuracy is improved. Therefore, the efficiency and precision of measuring the size of the product can be effectively improved, the reliability of a measurement result is ensured, and powerful support is provided for quality control and decision making in the production process.

This invention discloses a multi-vision method for measuring the dimensions of small workpieces based on a binocular vision system, belonging to the field of workpiece dimension measurement technology. Addressing the difficulty in achieving accurate three-dimensional dimension measurement using existing methods, the following solution is proposed, comprising the following steps: S1: Chessboard corner point extraction; S2: Calibration plate removal; S3: Plane fitting; S4: Vertex extraction; S5: Stereo matching algorithm; S6: Dimension calculation. The average absolute error of this invention at different angles is 0.33 mm, the total relative error is 0.90%, and the variance is less than 0.01 mm. 2 This enables relatively accurate measurement of the three-dimensional dimensions of small workpieces from multiple perspectives.

The invention relates to the technical field of size measurement, in particular to a high-precision measurement method for the size of an ABS plate mold, and the method comprises the steps: scanning the surface of the ABS plate mold twice, respectively obtaining all point cloud data and all sparse point cloud data, and respectively constructing a three-dimensional mold model and a three-dimensional sparse model, performing spatial calibration on the three-dimensional mold model, and dividing the three-dimensional mold model into a plurality of component models; and calculating the space deviation value, the reflection deviation value, the adjustment coefficient and the adjusted filtering radius of each part model, filtering the point cloud data on all the part models by combining a filtering algorithm to obtain a reconstructed three-dimensional mold model, and measuring the size of the ABS plate mold. By dynamically adjusting the filtering radius of the filtering algorithm, the deviation influence caused by the reflectivity difference of different materials in the ABS plate mold is effectively reduced, and the precision and accuracy of size measurement of the plate mold are improved.

1. Name of the Design Product: Measuring Industrial Camera (4K). 2. Use of the Design Product: This design product is used for geometric dimension measurement and image processing functions of products such as electronics and hardware. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: Stereogram.

The utility model discloses the technical field of machining measurement device, more specifically discloses a kind of for the size measurement tool of incomplete circle, comprising: tool main body, detachably set on part;Compensation component, set on tool main body, can be synchronous with the arc to be processed Machining;Wherein, the straight line of the center of the arc to be processed of compensation component and arc to be processed can pass through arc to be processed;Measuring component is used to measure the diameter between compensation component and arc to be processed;By using the utility model, arc can be measured in real time during processing, cancel the use of radius gauge and three-dimensional coordinate instrument;Greatly reduce the difficulty of real-time measurement arc actual size in part processing process, improve the arc size measurement stability and accuracy, can effectively improve the product quality and stability of part.

The present application discloses a product size measurement method, device, equipment and medium, which relates to the field of three-dimensional measurement technology. The method includes: photographing the product to be measured by a preset top camera and a preset bottom camera to obtain the upper surface and the lower surface of the product to be measured, and determining the inclination angle of the upper surface and the inclination angle of the lower surface of the product to be measured based on the upper surface and the lower surface of the product to be measured; determining the inclination angle of the product to be measured based on the inclination angle of the upper surface and the inclination angle of the lower surface of the product to be measured and the inclination angle of the upper surface and the lower surface of the calibration block of a preset calibration block; rotating and adjusting the upper surface and the lower surface of the product to be measured according to the inclination angle of the product to be measured to obtain the actual upper surface and the actual lower surface of the product to be measured; and determining the size of the product to be measured based on the actual upper surface and the actual lower surface of the product to be measured.

The invention belongs to the technical field of testing and measuring, and particularly relates to a fastener size measuring method and system based on a structured contour line. The method comprises the following steps: placing a calibration block on a detection platform for image acquisition, and taking an upper edge line of the calibration block as a reference line; the calibration block is taken down, and the fastener is placed on a detection platform for image acquisition; extracting a plurality of feature points from the outer contour of the fastener image, calculating a symmetric line for representing the symmetry axis of the fastener, and correcting the outer contour line of the image based on the symmetric line; according to the corrected outer contour line, a cylindrical surface outer contour straight line and a conical surface outer contour straight line of the fastener are determined, and two intersection points of the cylindrical surface outer contour straight line and the conical surface outer contour straight line on the left side and the right side of the fastener are calculated respectively; determining the distance from the midpoint of the connecting line of the two intersection points to the datum line; and determining the processing precision of the fastener according to the distance and a preset distance threshold value. According to the invention, the measurement precision of the dimension of the fastener is improved.

The present application discloses a size measurement method, device, equipment and storage medium, relating to the technical field of industrial measurement, including: determining the coordinates of the points to be measured corresponding to the current image data according to the target vision conversion model; when there are special points among the points to be measured, preprocessing the special points among the points to be measured, and updating the points to be measured according to the processing result; measuring the size of the product to be measured according to the coordinates of the updated points to be measured. By the above method, after collecting the current image data of the product to be measured by using an optical measurement device, the coordinates of the points to be measured are determined based on the target artificial intelligence service device according to the target vision conversion model, and it is judged whether there are special points among the points to be measured. If so, the size of the product to be measured is measured based on the geometric measurement strategy, so as to effectively improve the efficiency and accuracy of measuring the size of the product, ensure the reliability of the measurement result, and provide strong support for quality control and decision-making in the production process.

The invention discloses an intelligent tension wire device for high-rise building reference transmission and an offset monitoring method, and relates to the technical field of high-rise building construction surveying and mapping, the device comprises a reference fixing mechanism, a tensioning mechanism, a multi-source surveying and mapping data acquisition module, a data processing module and a data output module; according to the invention, the GNSS real-time dynamic surveying and mapping module, the inertial measurement unit and the linear array CCD visual surveying and mapping sensor are integrated to construct a multi-source surveying and mapping data acquisition system, multi-source data fusion is realized in combination with a Kalman filtering optimization algorithm, the problems of single-dimensional measurement and large error in the prior art are solved, full-dimensional coverage and high-precision measurement of tension wire offset are realized, and the measurement precision is improved. Through real-time calibration of a data processing module and a high-rise building construction coordinate system and format output of an adaptive standard, an extra data conversion step is avoided, the problems of poor data compatibility and untimely construction guidance are solved, and it is ensured that measured data can be directly used for construction regulation and control.

The invention relates to the field of dimension measurement equipment, and discloses a full-automatic dimension measurement device for a basin stand, and the device comprises a feeding mechanism which is used for directionally conveying a to-be-measured product to a detection station; the detection module is arranged on one side of the feeding mechanism, and the detection module is sequentially provided with a code scanning unit, a front face detection unit, a reverse face detection unit, a side face detection unit and a laser detection unit in the conveying direction. According to the invention, by integrating the code scanning module, the front and back visual inspection module, the three-dimensional contour scanning module and the laser thickness measurement module, the full-automatic operation process of automatic feeding, automatic detection and automatic discharging is realized, the detection speed and efficiency are improved, multiple detection functions are integrated on one device, multi-parameter and all-directional detection of products is realized, and the production efficiency is improved. The occupied area and the number of detection equipment are reduced, and the space utilization rate of a production site is improved.

The application relates to a size measurement method, device, computer equipment and computer readable storage medium. The method comprises the following steps: obtaining a 2.5D depth image of an object surface to be measured, and establishing a two-dimensional reference coordinate system in the 2.5D depth image; wherein the 2.5D depth image refers to a two-dimensional image comprising depth information; determining a target position and a coverage area of a virtual probe in the 2.5D depth image under the two-dimensional reference coordinate system; extracting depth information from pixel points in the 2.5D depth image within the coverage area through the virtual probe, and determining a three-dimensional point position according to the depth information and the target position; constructing a three-dimensional reference coordinate system based on the three-dimensional point position and the two-dimensional reference coordinate system; and performing size measurement on the object to be measured based on the three-dimensional reference coordinate system to obtain a size measurement result. The application can improve the accuracy of size measurement.

The utility model relates to a vernier straight rod ruler measuring device for a wide-range inner hole, and belongs to the technical field of object dimension measurement. According to the technical scheme, one end of a ruler frame (1) is provided with a ruler frame cover plate (2) and a vernier scale (8), and the other end is provided with a second measuring head (9); one end of the main ruler body (5) is provided with a measuring head I (6), and the other end of the main ruler body (5) is slidably arranged in a space formed by the ruler frame (1), the ruler frame cover plate (2) and the vernier (8); a spring shaping rod (10) is arranged in the ruler frame (1), and a spring (11) is sleeved on the spring shaping rod (10); the main ruler body (5) is provided with a cavity (21), the spring shaping rod (10) and the spring (11) are both arranged in the cavity of the main ruler body (5), and the spring (11) moves through stretching and retracting of the main ruler body (5). The beneficial effects of the utility model are that the device is high in measurement precision, is wide in measurement range, can rapidly deal with the switching of measurement of different sizes, and improves the measurement work efficiency.

The invention relates to the technical field of steel structure measurement, discloses a high-precision steel structure geometric dimension measuring and positioning method, and aims to solve the problems that an existing measuring means is low in efficiency, limited in coverage range, poor in key feature extraction robustness, difficult to adapt to a complex field environment and lack of a real-time comparison feedback mechanism. The method comprises the following steps: deploying a multi-modal sensing system, and synchronously acquiring laser point cloud and binocular vision data; adaptive denoising and multi-view point cloud splicing are executed; fusing the visual edge and the point cloud curvature features to generate a high-confidence geometric feature set; reconstructing a local fine three-dimensional model based on a moving least square method; dynamically comparing the actual measurement model with the BIM design model to generate a full-surface deviation distribution diagram; and identifying the out-of-tolerance area and outputting a three-dimensional deviation correction instruction. By the adoption of the technical scheme, non-contact measurement and closed-loop correction with millimeter-level precision can be achieved, and the one-time success rate and the intelligent construction level of steel structure installation are remarkably improved.

The present application provides a method and device for measuring the geometric dimensions of a point cloud based on a caliper. The method includes: obtaining a point cloud to be measured, a virtual caliper, and a measurement direction; constructing a search geometry based on the virtual caliper and the measurement direction; segmenting the point cloud to be measured based on the search geometry to obtain a candidate point cloud; extracting point cloud measurement points along the measurement direction from the candidate point cloud based on the virtual caliper; calculating the distance between the point cloud measurement points, and using the distance as the dimension of the point cloud to be measured along the measurement direction. Before extracting the point cloud measurement points, the present application segments the point cloud to be measured by constructing a search geometry to obtain a candidate point cloud, thereby greatly reducing the amount of data and improving computational efficiency. In addition, it can achieve rapid and high-precision measurement of the geometric dimensions of workpieces of different directions and shapes in a variety of application scenarios, thereby improving the accuracy of the point cloud geometric dimension measurement results.

A dimension measurement method includes: extracting a plurality of lines from a plurality of images generated by shooting a target area from a plurality of viewpoints, and generating a line segment model which is a three-dimensional model of the target area that is expressed using the plurality of lines; calculating a dimension of a particular part inside the target area, using the line segment model; and outputting the dimension calculated.

The invention relates to a shaft measurement reference seat and a high-precision shaft local structure size measurement method, one end of a shaft is a positioning end face, and the reference seat comprises a radial limiting structure which limits the shaft in the radial direction so that the shaft can only move in the axial lead direction of the shaft; the universal floating platform is provided with a datum plane corresponding to the positioning end face, the datum plane is perpendicular to the axis of the universal floating platform, and the axis coincides with the axial lead; when the contour line of the positioning end face is not perpendicular to the axis, in the attaching process of the positioning end face and the datum plane, the universal floating platform elastically deforms, the axis is bent to enable the datum plane to incline, and after the positioning end face is separated from the datum plane, the datum plane is reset. And the reference surface of the universal floating platform without elastic deformation is used as a reference to measure the size parameters of the shaft. Therefore, the number of sensors used in the tight measurement process of the shaft can be reduced, the measurement rhythm is improved, and the manufacturing cost of measurement equipment is reduced.

The invention discloses a high-precision and high-efficiency spectral interference measurement method and system for wafer-level microstructure size measurement. The method comprises the following steps: constructing an interpolation function to reconstruct two frames of initially collected spectral interference patterns; normalizing the reconstructed two frames of spectral interferograms; selecting an effective position for calculating a spectral phase shift and a phase in the spectral interferogram based on a light intensity equivalent strategy; calculating the phase shift and phase of the spectral interferogram; and calculating the height dimension value of the microstructure contour. According to the method, the advantages of high precision, unconstrained phase shift and large measurement range of the random phase shift algorithm are effectively integrated, and the measurement task of the height size of the microstructure contour can be stably completed with the help of low calculation cost.

1. Name of the Design Product: Multifunctional Line Drawing Ruler. 2. Use of the Design Product: For dimension measurement and marking, and angle line drawing. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective View.

The invention discloses an automobile skid size measurement method and system based on three-dimensional reconstruction, and the method comprises the following steps: S1, controlling a mechanical arm to carry out the image shooting of an automobile skid according to a preset path and angle, and obtaining a plurality of processed images; s2, preprocessing the processed image, wherein preprocessing comprises data cleaning and point cloud feature extraction; s3, inputting the preprocessed processing image into the trained identification model to obtain part information including part classification and positioning; and S4, carrying out size parameter calculation on the part information to obtain the size of the automobile skid. And the sizes of different parts in the automobile skid can be accurately obtained, so that whether the production of the skid meets the specification requirement or not can be judged. The method can adapt to different automobile skid, and the universality of detection is improved.

The present invention relates to the field of quality inspection technology, and specifically discloses an electronic grating quality inspection method, system, and medium based on digital twins. The method includes: performing three-dimensional modeling on actual parts of standard form to obtain a digital twin model of the actual parts; partitioning the surface area of ​​the actual parts for quality inspection based on the digital twin model of the actual parts to obtain all appearance quality inspection areas of the actual parts; using a digital twin electronic grating group to inspect each appearance quality inspection area of ​​the actual parts to obtain shape and size measurement data and surface defect detection data of each appearance quality inspection area of ​​the actual parts; obtaining quality inspection results of the actual parts based on the shape and size measurement data and surface defect detection data of all quality inspection areas of the actual parts and the digital twin model; realizing accurate partition detection of the quality inspection object, and realizing intuitive visualization of the quality inspection results by using digital twins.

This utility model discloses a non-contact dimensional measuring device for industrial parts, including a chassis. The upper end of the chassis has two symmetrically arranged electric slide rails. A second electric slide rail is connected between the sliding seats of the two first electric slide rails via a support rod. An adjustment platform is located at the front end of the sliding seat of the second electric slide rail via a support seat. An adjustment rod is slidably connected inside the adjustment platform. A rotating measuring seat is located at the lower end of the adjustment rod. The device also includes a quick-release mechanism. The quick-release mechanism includes a mounting base, a magnet, a magnet, a mounting platform, and a secondary fixing assembly. The mounting base is located at the front end of the rotating measuring seat, and the mounting platform is inserted into the mounting base. This non-contact dimensional measuring device for industrial parts can measure complex curved surfaces or three-dimensional dimensions by quickly changing sensors, eliminating the need to switch between different devices to complete multi-dimensional measurements, thus reducing manpower waste and time costs.

The present invention relates to the field of dimension measurement technology, and in particular to a dimension error measurement method and measurement equipment for aviation transmission gears. The present invention obtains the relative coordinates of each gear point and each gear point in the neighborhood according to the position distribution of the corresponding laser points of each gear point and each gear point in the neighborhood under each line laser scan; obtains the relative coordinate confidence of each gear point and each gear point in the neighborhood according to the single point stability index of the corresponding laser points of each gear point and each gear point in the neighborhood under each line laser scan, and the scanning normal factor of the scanning profile; obtains the corrected coordinates of each gear point according to the coordinates and coordinate accuracy of the corresponding laser points of each gear point under different line laser scans; obtains a three-dimensional model of the gear and measures the gear dimension error. The present invention obtains the accurate position coordinates of each gear point, constructs a three-dimensional model of the gear, and improves the accuracy of the gear dimension error measurement.

This invention discloses a method for measuring the outer contour dimensions of sheet metal based on contour chain corner point allocation and adjacent edge correction. The method acquires a scanned point cloud of the sheet metal to be measured and maps features such as template outer contour corner points, straight edges, and arc edges to the scanned point cloud coordinate system as a reference for outer contour feature localization. Subsequently, the scanned point cloud is projected onto a two-dimensional measurement plane, and the outer contour boundary is obtained using the Alpha Shape boundary extraction method. An ordered outer contour chain is then formed through resampling. Based on this, candidate corner points are scored for contour chain points in the neighborhood of template corner points, and global allocation is performed based on the contour order, relative distance, and directional relationship between template corner points to determine the primary positioning corner points. For corner points with excessive errors or weak features, the corner point position is further corrected based on the straight line or arc fitting results of the adjacent edges on both sides. Finally, the outer contour dimension parameters such as straight edge length, arc radius, and arc center are calculated. This method can improve the stability of outer contour corner point localization and dimension measurement of sheet metal and is suitable for automated detection of sheet metal outer contours.

One implementation provides a device and method for the simultaneous measurement of weight and dimensions of an object, enhancing efficiency by integrating these processes into a single step. One implementation encompasses a flat platform weight scale base containing load cells that ascertain the object's weight. It also features image sensors for capturing images from different angles to determine the object's length, width, and height through image analysis. The processor computes weight from load cell readings and applies image processing to assess object dimensions. This data can be displayed or transmitted, often wirelessly, for external usage, beneficial for industries requiring precise weight and size information to streamline various processes such as logistics and inventory management.

The invention discloses a size measurement method and device, equipment and a storage medium, and relates to the technical field of industrial measurement, and the method comprises the steps: obtaining the current image data of a to-be-measured product, and determining the coordinates of a to-be-measured point corresponding to the current image data according to a target visual conversion model; carrying out point location number identification on the to-be-detected point location; and measuring the size of the to-be-measured product according to the coordinates of the to-be-measured point locations when determining that no special point location exists in the to-be-measured point locations according to the identification result. Through the above mode, the coordinate of the to-be-detected point location is determined based on the target visual conversion model trained by the visual conversion algorithm of the newly added bidirectional feature cascade module and the bidirectional attention fusion module, then whether a special point location exists is determined through the identification result of the point location number, and if not, the to-be-detected point location is determined. If not, the size of the product to be measured is measured based on the geometric measurement strategy, so that the precision of measuring the size of the product can be effectively improved, the requirement of high-precision size measurement is met, and powerful technical support is provided for the modern high-end manufacturing industry.

This invention relates to the field of intelligent inspection technology, specifically to a method, system, equipment, and medium for measuring the stiffeners of a train carriage in harsh environments. By deploying top-down through-beam lidar on the front and rear tops of the carriage, point cloud data inside the carriage is collected. Even if the point cloud of the stiffener itself cannot be imaged due to environmental influences, the trailing point cloud appearing on the extension line of the stiffener can still be used, combined with a multi-radar spatial geometric inversion algorithm, to accurately calculate the true three-dimensional spatial position and size of the stiffener. Based on the spatial distribution of the trailing point cloud of the multi-lidar, a multi-line intersection inversion algorithm is used to achieve three-dimensional positioning and size measurement of the stiffener, without relying on the point cloud of the stiffener itself. It has strong environmental adaptability and automation capabilities, significantly improving the robustness, efficiency, and intelligence level of train carriage structure inspection.