17 results about "Absolute positioning" patented technology

The application provides a vehicle positioning method, a system, an electronic device and a computer storage medium, and relates to the technical field of automatic driving. In the absence of a fixed base station, the observation data of visible satellites is shared by two vehicles, so that the construction and maintenance costs can be saved, and the two-vehicle sharing can also be adapted to complex scenes and network-uncovered areas. In the positioning process, single-difference and double-difference processing is performed on the common visible satellites of the two vehicles, satellite clock errors, receiver clock errors and most atmospheric errors are eliminated, a high-precision relative baseline vector is obtained, and the obtained perception data of the two vehicles are fused and optimized to obtain the absolute positioning of the two vehicles, so that the positioning precision is improved and the absolute positioning reaches a centimeter-level precision. The purpose of providing stable and high-precision vehicle absolute positioning in a dynamic environment without relying on a fixed base station is achieved.

The application discloses a kind of tool butt joint method and system, including end setting with laser range finder, positioning tool interface is provided with measured piece;When reaching the position to be corrected, the laser measurement height value is read by laser range finder;The correlation analysis of the installation offset of laser range finder and the projection point on measured piece is carried out, and the coordinate relationship equation is established;Offset is calculated according to coordinate relationship equation, whether offset meets the requirement is judged, if it meets the requirement, then butt joint is completed, if it does not meet the requirement, then translation adjustment is carried out.The application is tested in laboratory, can control robot end absolute positioning accuracy to be below ±0.25mm, satisfies the requirement that robot completes butt joint operation;Uniform processing standard and gauge standard batch processing measured target are used, and quick replacement can be realized;3-point correction algorithm is used, installation error is weakened, and calculation error caused by installation error is further reduced.

A navigation system is described that allows for absolute pointer positioning by integrating a lever that establishes the navigation and activation relationship of the pointer, similar to a mouse, but without the drawbacks of sequential positioning methods. This innovative system combines a lever, an infrared light emitter, a camera, and image processing software to locate the lever's position in two dimensions and synchronize this position with the mouse pointer. The lever moves on a spherical surface or ball joint, enabling precise and fluid navigation. The infrared light emitter and the camera work together to establish the pointer's position, while image processing software allows the infrared emitter's position to be located in two dimensions and associated with the computer pointer's position.This approach offers absolute pointer positioning, improving the user experience in terms of accuracy and comfort.

A method and system for locating defects in cable-stayed bridges based on image recognition is disclosed, relating to general image data processing or generation. In this method, the spiral features of the cable-stayed bridge in consecutive video frames are extracted, and a sequence of equally spaced virtual nodes is generated by combining these features with a reference pixel spacing. The cumulative pixel displacement of the current frame is obtained by matching the translation differences between virtual nodes in adjacent frames. When a defect is identified, the intra-frame pixel offset of the defect relative to the first virtual node is calculated. Finally, the cumulative displacement and the intra-frame offset are added to obtain the total pixel coordinates of the defect, and calibration parameters are used to convert them into absolute positioning coordinates in physical space. This application aims to suppress missed and false detections during image feature extraction, reduce accumulated errors in visual distance calculation, and thus improve the accuracy of locating cable-stayed bridge defects in physical space.

The application discloses a kind of mechanical arm error compensation methods based on geometric error and non-geometric error combination, belong to mechanical arm precision control field.The present application mainly includes two parts of geometric error parameter error compensation based on least square algorithm and non-geometric error compensation based on BP neural network;In the geometric error compensation stage, the mechanical arm geometric error model is established by MDH method, then least square algorithm is designed to solve error model to obtain geometric error model data;In the non-geometric error compensation stage, the non-geometric error model based on BP neural network algorithm is designed to adaptively predict position and attitude compensation data;Geometric and non-geometric error compensation data are combined to compensate the positioning error of mechanical arm.The comprehensive error compensation method of the application can efficiently realize the high-precision error compensation of six-degree-of-freedom mechanical arm, and improve the absolute positioning accuracy of six-degree-of-freedom mechanical arm.

The present application belongs to the field of airborne photoelectric reconnaissance and situation awareness, and discloses a kind of integrated visual scene generation method based on photoelectric video motion estimation, comprising the following steps: determining the visual scene geographic range according to the photoelectric starting point position;For adjacent frames of photoelectric image, feature point extraction and matching are carried out;For the starting geographic area of photoelectric image, select the integrated visual scene geographic area and the corresponding photoelectric image for matching;According to the matching feature point pair of adjacent frames, the relative motion rotation matrix and translation matrix are solved;According to the matching result, the absolute positioning result of the carrier is solved;Fusion absolute positioning and relative positioning result, form continuous positioning result output;Establish a virtual camera imaging model;Based on virtual camera, integrated visual scene is generated.The present application can meet the integrated visual scene generation ability of existing airborne equipment under certain degree of anti-interference condition, and can be applied in multiple airborne task scenes by designing special software module, to help realize high-precision matching ability between multiple modal images.

The industrial robot absolute positioning error compensation method solves the problems of weak normal observation and unstable pose estimation under long distance or inclined angle in the existing robot absolute positioning, and belongs to the technical field of industrial robot precision control. The present application comprises: constructing a multi-layer parallel ArUco marker field in the workspace and optimizing the layout; the robot end monocular camera collects the marker field image along the planned path, and the enhanced image is obtained through edge-ROI guided super-resolution reconstruction; corner detection and pose solution are carried out based on the enhanced image, the actual pose is obtained and compared with the theoretical pose to obtain the pose error, and the re-projection error is recorded, and the data set is composed of the robot state characteristics; the data set is used to train the heteroscedastic Gaussian process regression model, wherein the observation noise variance of each sample is proportional to the square of the re-projection error; for the target task path point, the state characteristics are input into the model to predict the pose error and compensate to the theoretical instruction to generate the modified control instruction.

The application discloses a table virtual scrolling method and system, which comprises providing a root element, setting a scrolling container and a display container in the root element, and the two containers are sibling nodes in the same DOM level; the two containers are fixed in the root element through absolute positioning, and the display container is visually displayed on the scrolling container; the display container is fixed in the visible area and does not produce position deviation with the scrolling of the scrolling container; horizontal and vertical absolute positioning coordinates are set for each cell in the display container, and the final display position of all cells in the table is determined through absolute positioning; the scrolling container is used as the only node for executing the scrolling operation, and the scrolling displacement is generated by the scrolling container; the starting index and the ending index of the current visible area are calculated in real time according to the scrolling displacement, only the cells in the index range are rendered, and the cells outside the visible area are not rendered; the performance bottleneck of the white screen during fast scrolling, the synchronous misplacement of fixed columns and too many horizontal columns is overcome.

This invention belongs to the field of industrial robot-assisted manufacturing and precision operation technology, and discloses a method and device for precision micro-operation of industrial robots. The method includes: establishing a robot differential kinematic error model coupled to a tool coordinate system; automatically acquiring data on the robot's end-effector pose and corresponding robot joints using a low-cost probe and planar calibration block; constructing and solving a set of error identification equations including tool errors to obtain a corrected robot kinematic model; proposing a virtual tool coordinate algorithm to convert the calibration results for the probe into actual target point control of the micro-operation actuator; and using the corrected robot kinematic model and its corresponding compensation program to control the robot to complete high-precision micro-operations. This invention can improve the absolute positioning accuracy of robots from hundreds of micrometers to tens of micrometers, and is low-cost and highly automated, showing broad application prospects in the field of robot-assisted precision micro-operations.

This invention relates to the field of pose measurement and discloses a maskless embedded composite grating target and measurement system for precision linear guide components. The target includes a grating substrate, and within the same physical plane of the grating substrate, a two-dimensional incremental grating and an absolute positioning structure are disposed. The absolute positioning structure is discretely distributed within the two-dimensional incremental grating. No physical mask obstructs the target. In the measurement state, the spot of a single beam of measurement light simultaneously covers at least a portion of the two-dimensional incremental grating and at least one of the absolute positioning structures. The measurement system is implemented based on the target. The beneficial effects of this invention are that it eliminates Abbe error caused by measurement point separation at the physical level, achieving true single-point homogeneous six-degree-of-freedom measurement, and providing a high-precision, fully-degree-of-freedom, and compact in-situ measurement reference for ultra-precision industrial machine tool stages.

This application discloses a multi-sensor fusion positioning and correction method for a trolley. The method includes: acquiring multi-source sensor data; extracting the absolute value of the difference between longitudinal velocity and wheel-end linear velocity as a slip observation feature value; in the error state Kalman filter model, exponentially expanding the measurement noise covariance matrix of the wheel encoder when the feature value is not less than a threshold, and outputting a corrected pose; inputting the corrected pose and feature value into a model predictive controller, dynamically increasing the control increment penalty weight, solving for the optimal correction torque command sequence, and executing it. This application can actively isolate false mileage data generated by slippage, ensuring absolute positioning accuracy, and actively softening the correction action to avoid dynamic oscillations in the system.

A three-dimensional position positioning method based on visual recognition and multivariate measurement fusion belongs to the technical field of electric digital data processing and multi-sensor data fusion. The method constructs a unified motion state model, cooperatively fuses the environment structure information obtained by visual recognition and the quantitative measurement information of multi-source sensors, and introduces a physical consistency constraint mechanism to dynamically evaluate and adaptively adjust the credibility of different information sources, so that continuous, stable and high-precision three-dimensional position estimation can be realized in the case of unstable absolute positioning information, shielding or measurement anomaly. The present application can effectively suppress the interference of abnormal measurement on the positioning result, improve the positioning robustness and reliability of the system in complex terrain, slope and urban structure environment, and is suitable for technical fields such as intelligent vehicles and mobile robots.

The application discloses a high-precision damping hinge, which can reduce the back difference by applying pre-tightening force, and realizes high positioning precision through a limiting surface, and has the following advantages: high absolute positioning precision, high repeat positioning precision, high rigidity, compact structure, light weight, and the like; the hinge is integrated with a damper, and impact generated when a large load is unfolded is reduced.

This invention discloses an intelligent task scheduling and management method based on vision-based inspection robot localization. This invention relates to the field of task scheduling and management technology, including digital archiving of inspection asset ledgers and binding with positioning targets, inspection task scheduling and path planning, precise absolute positioning execution of the robot, inspection data collection, coordinate labeling and reporting, intelligent identification and handling of abnormal events, and work order management. The advantages of this invention are: by using no fewer than four total stations to calibrate positioning targets for redundant absolute positioning, centimeter-level three-dimensional absolute coordinate positioning accuracy is achieved, fundamentally eliminating the cumulative error of relative positioning methods; the CSG semantic occlusion model can dynamically quantify the degree of scene occlusion; and adaptively scheduling multiple sensors such as binocular vision, LiDAR, inertial measurement unit, RTK-GPS, and ultra-wideband positioning module to work collaboratively, ensuring stable and reliable positioning in complex environments such as mild, moderate, and extreme occlusion.