328 results about "Reference line" patented technology

The invention relates to a czochralski method-based crystal growth interface shape detection method and device. The method comprises the steps that: a seed crystal temperature T and an interface electromotive force U at the same time in a crystal growth process are collected, and a T-U curve of the interface electromotive force U changing with the seed crystal temperature T is obtained; the change trend of the shape of a crystal growth interface in real time is judged by observing the deviation between the T-U curve and a reference line, wherein the reference line is a straight line passing through the starting point of the T-U curve, and the slope of the straight line is the Seebeck coefficient of the crystal. The invention also relates to a device used by the method. The detection method provided by the invention can detect the change trend of the shape of the crystal growth interface in real time in the crystal growth process, and can be applied to Czochralski method growth equipment for various single crystals such as lithium niobate, lithium tantalate, sapphire, yttrium aluminum garnet and the like.

In various examples, a simulation platform generates a simulated driving environment by processing road map data to derive the location of wear-related visual artifacts for sections of a lane surface. Using map data, the simulation platform generates texture maps for aesthetic road rendering, which are used to apply textures to a 3D polygon topology mesh. The simulation platform generates visual artifacts representing the wear and tear of the road surface based on a calculation of one or more lane feature distances derived from the map data. The simulation platform calculates distances associated with reference line data derived from an image to render a texture of one or more lane features.The spacing is used to determine how the appearance of the texel is adjusted to include wear-related visual artifacts when displayed on a lane of the simulated driving environment.

The present application relates to a kind of method and device for judging the trend of concrete oblique crack tip, fill metal powder in the crack to be measured;Determine the beginning and end point of crack trend according to the opening trend of crack surface to be measured, draw the center line of the connecting line of beginning and end point as the first measuring line, respectively from the two end points of the first measuring line along the first measuring line to crack opening position detection using electromagnetic wave radar detector, record the position and depth of the first fluctuation point on radar development map;With the first measuring line as reference line, rotate to make several new measuring lines, obtain the position and depth of the first fluctuation point of each new measuring line;Fluctuation point is sorted according to measuring line sequence, draw the connecting line diagram, i.e. the trend curve of oblique crack tip.The present application is based on the essential characteristics such as the height and form of oblique crack tip position, combined with the measurement mode from far to near, multi-angle, multiple measuring points and the reflection law of radar wave by metal powder, the position and depth of multiple points of concrete oblique crack tip are measured, and then the trend of crack tip is effectively judged.

The invention relates to the technical field of automatic driving, and discloses a tramcar path planning method, device and equipment based on a reference line and a storage medium. According to the method, an improved A * search algorithm is combined with reference line discretization and smoothing processing, the node expansion number is reduced, the path smoothness is optimized, and the tramcar path planning efficiency is improved. Meanwhile, a double-factor heuristic function and dynamic constraint verification are utilized to ensure that the path is safe and feasible, and the method has the advantages of improving path planning efficiency, reducing path fluctuation, meeting special terrain and dynamic constraint requirements of a mining area and ensuring that the mine car stably travels along a predetermined reference line.

The invention discloses a method for generating a reference line in vehicle driving path planning and electronic equipment, and the method comprises the steps: obtaining initial data corresponding to an automatic driving vehicle, the initial data comprising driving map information, historical driving track information and vehicle parameter information; preprocessing the initial data to obtain target data; according to the target data, constructing boundary constraint information required by optimization based on the environment information; according to the initial reference line and the target boundary constraint information, generating target input information corresponding to a target reference line optimizer, and inputting the target input information to the target reference line optimizer, so that the target reference line optimizer performs reference line optimization processing according to the target input information to generate corresponding target output information, the target output information comprises a target reference line of the autonomous vehicle corresponding to a target driving road in the driving environment. Therefore, the reasonability and accuracy of the reference line can be improved.

The invention discloses a multi-view three-dimensional reconstruction driven cattle body size online measurement method, and relates to the technical field of animal husbandry three-dimensional measurement, and the method comprises the steps: extracting a ground reference plane, a segment elevation function, a guardrail reference line, a segment guardrail spacing, a periodic pitch and a hoof ground contact event, and generating a calibration opportunity score in combination with a pixel-level quality weight map; in the sliding window factor graph, jointly solving an external parameter rotation matrix, an external parameter translation vector and a global scale by taking the prior as a constraint, and outputting an uncertainty matrix; implementing hierarchical self-recovery according to the comprehensive health degree and the score, and replacing safe writing with double buffer atoms; carrying out weighted splicing under a unified measurement coordinate and carrying out profile robust measurement, forwards transmitting uncertainty to a body size layer and supporting individual multi-time column-passing convergence; the method is suitable for channel visibility interruption and structure variable scenes, and under the condition of uninterrupted release, measurement consistency is kept and auditable results are output.

Proximity-based surface texture generation for simulated environment systems and applications is disclosed. In various examples, a simulation platform generates a simulated driving environment by processing road map data to infer locations of wear-related visual artifacts for portions of a roadway surface. The simulation platform uses the map data to generate texture maps for aesthetic road rendering, which are used to apply texture to the 3D polygon topology mesh. The simulation platform generates visual artifacts representing use and wear of the roadway surface based on calculating one or more distances from roadway lane features derived from the map data. The simulation platform calculates a distance from the one or more roadway lane features associated with reference line data derived from the image to render the texture. The distances are used to determine how to adjust the appearance of texels to include wear-related visual artifacts when rendering wear-related virtual artifacts on the roadway of the simulated driving environment.

A method of and an apparatus for controlling intra prediction for decoding of a video sequence are provided. The method may include based on a reference line index signaling a first reference line nearest to a coding unit, among a plurality of reference lines adjacent to the coding unit, applying intra smoothing on one or more first reference lines comprising the first reference line, among the plurality of reference lines, and based on the intra smoothing being applied on the one or more first reference lines, applying a position-dependent intra prediction combination (PDPC) on one or more third reference lines comprising the first reference line, among the plurality of reference lines, while preventing application of the PDPC on one or more fourth reference lines other than the one or more third reference lines, among the plurality of reference lines.

In the embodiments herein, an instrument for level and plumb determinations, includes: a sealed chamber of equal dimensions made from transparent or translucent material marked with center lines and filled with a colored fluid, so when placed on any surface. Relative to the orientation of the surface to the face of the earth, the instrument reveals if a surface is: plumb within an upright position; level within a horizontal position; or at an angle, which can be marked and transferred. Reference lines are placed exactly parallel and centered to the sides and ends.

The invention provides a method for measuring the position of a welding seam by using a Leeb hardness tester. Comprising the following steps that firstly, a theoretical position line of the center of a welding bead is drawn according to a reference positioning datum; secondly, two datum lines parallel to the theoretical position line of the center of the welding bead are drawn out; thirdly, weld bead excess weld metal or protrusions at the measuring positions on the two sides of the center line are polished and removed; step 4, a measurement position line is drawn between the two datum lines, the measurement position line is perpendicular to the two datum lines, and a measurement point is drawn on the measurement position line every 3mm; step 5, measuring the hardness of each measuring point by using a Leeb hardness tester, wherein each measuring point is measured for more than three times; analyzing an average value of measurement data of each measurement point, and drawing a hardness-position curve graph according to a position corresponding relation; obtaining the position and boundary dimension information of the welding seam according to the measurement position point by comparing the hardness change area; and more accurate position and boundary dimension information of the weld joint is obtained in a measurement point encryption mode.

A video decoder may be configured to determine that a block of video data is encoded using an intra prediction process that utilizes multiple intra prediction predictors; determine a set of reference lines for the intra prediction process; determine a first set of intra prediction predictors based on the set of reference lines; determine a second set of intra prediction predictors based on the set of reference lines; generate a fusion of predictors from the first set of intra prediction predictors and the second set of intra prediction predictors; and decode the block of video data using the fusion of predictors.

The invention provides a parametric modeling method for a bridge support, and the method comprises the following steps: creating a spatial three-dimensional curve: creating the spatial three-dimensional curve of a design line; a project model file creation step: creating a support project model file; a horizontal curve creation step: creating a horizontal curve according to the spatial three-dimensional curve, and obtaining a cross section datum line; a calculation step: calculating coordinates of component placement according to the cross section reference line; and a placing step: placing the component according to the coordinates, and setting design parameters of the component. According to the method, parametric modeling of the bridge support is achieved, automatic arrangement and parametric generation are achieved, the manual modeling time is greatly shortened, and the modeling efficiency is improved.

The invention belongs to the technical field of visual sensors, and particularly relates to a gap measurement method which is used for describing a gap in a segmented manner, describing the whole gap based on a segmented manner, establishing a surface point cloud of the gap by using a fringe projection structured light three-dimensional measurement technology, and extracting a boundary point cloud of the gap by using a binocular fringe-free picture. Fitting the surface point cloud and the boundary point cloud to solve the problem of large noise point quantity at the boundary in the measurement process of the binocular fringe projection structured light system; and meanwhile, the reference plane and the reference line are fitted by depending on the existing point cloud data, so that the fitting error is reduced. On the basis of improving the gap measurement precision, the method can be suitable for measurement of complex gaps which are long and narrow in gap shape, have light pollution, have low-frequency micro-amplitude vibration, have external shielding and have dynamic non-uniform deformation in the length direction in the fields of aerospace, rail transit, precision manufacturing, heavy industry and the like.

The utility model belongs to the related technical field of automatic welding equipment, and particularly relates to a frame welding fixing device. A workbench is arranged, the workbench is provided with a first datum line and a second datum line, the first datum line and the second datum line are perpendicular to each other, and a first frame and a second frame are arranged on the workbench along the first datum line and the second datum line respectively; and at least one pushing mechanism is arranged to push the frame to the datum line, and the pressing mechanism is arranged to conduct automatic pressing, so that the pushing mechanism and the pressing mechanism are combined to fix the frame, the stability of the frame is improved, and therefore metal frame welding is conducted through the welding mechanism. By means of the frame welding and fixing device, automatic welding and fixing of the metal frame are achieved, so that the welding efficiency and stability are improved, the production cost is reduced, and the quality of welded products is improved.

The application discloses a kind of super-long part bending front feeding positioning device and method, belong to metal sheet precision forming manufacturing field, method is through high-precision measurement acquisition feeding platform surface full field data, constructs and bending mould center line alignment digitization platform surface model, and generates height constant equal to mould center line global reference line and static platform compensation mapping function.In feeding process, the trajectory deviation of the part bottom surface relative to the reference line is detected in real time using a non-contact displacement sensor array, the static compensation value is combined with feedforward-feedback composite control to drive the active leveling mechanism for vertical adjustment, and the static error and dynamic disturbance of the platform are simultaneously offset.The system continuously monitors the actual trajectory and triggers the instant adjustment mechanism when the deviation exceeds the limit.The application solves the problem of error accumulation in super-long part feeding by establishing a global unified reference, integrating static pre-compensation and dynamic closed-loop control, and constructing multiple verification, achieving high-precision positioning.

A projection device (20) comprises: a distance measurement unit (22) that measures the distance to the projection device (20) from each of three or more non-aligned points located on two non-parallel reference lines, which are drawn on a projection surface (50) in the building and the positions of which are defined in drawing data of a building; an angle measurement unit (27) that measures the angle of the distance measurement unit (22) when the distance was measured; a control unit (24) that performs spatial recognition to link a position in the drawing data with a position on the projection surface (50) on the basis of the measured distance and the angle of the distance measurement unit (22) when the distance was measured; and a projection unit (23) that projects a light-emitting point at a position on the projection surface (50) corresponding to a work position defined in the drawing data. The control unit (24) shifts the position of the light-emitting point on the projection surface (50) on the basis of the result of the spatial recognition.

The rotary clamping self-locking mechanism comprises a shell, a first clamping jaw, a second clamping jaw, a locking rod and a driving rod, the first clamping jaw and the second clamping jaw are arranged at the two ends of the shell correspondingly, and the first clamping jaw is slidably arranged on the shell. The first clamping jaw is provided with a locking groove, the locking rod is arranged in the locking groove, and the first end of the locking rod and the first clamping jaw are arranged in a relative rotation mode and form a first pivot point. The driving rod is rotatably arranged on the shell, and the driving rod is pivoted with the second end of the locking rod to form a second pivoting point, so that the locking rod is driven to move; when the driving rod rotates, the second pivoting point rotates along an arc, so that the locking rod pulls the first clamping jaw to slide; a datum line is virtually constructed in the length direction of the shell and passes through the first pivot point, and when the second pivot point is located on the right side of the datum line, the first clamping jaw is self-locked; when the second pivot point is located on the left side of the datum line, the first clamping jaw is unlocked. Compared with the prior art, the rotary clamping self-locking mechanism has the advantages that self-locking can be achieved, and clamping is more stable and firmer.

A work machine control device (40) is a control device for a work machine (100) comprising a machine body and a work device (3) that is rotatably supported by the machine body. The work machine control device (40) comprises a controller (50) that calculates the intersection (P1) of a predicted trajectory (PL), which is traced by a specific part (SP) of the work device (3) in conjunction with the rotation of the work device (3), and a target reference line (TL), which is set following along a target construction surface (S1), and on the basis of the height difference between the specific part (SP) and the intersection (P1), or a physical quantity correlated with said height difference, controls the operation speed of the work device (3) when the specific part (SP) approaches the intersection (P1).

This application relates to the field of automotive driving technology, and discloses a trajectory planning and decision-making method, device, vehicle, medium, and program product to ensure more reasonable avoidance decisions while reducing computational power consumption. Specifically, the method includes: detecting an avoidance target during vehicle operation; determining a target reference line for the vehicle to bypass the target, wherein the target reference line indicates the bypass direction and endpoint of the vehicle to bypass the target, and the target reference line is one of at least two reference lines, and at least two of the at least two reference lines have different bypass directions; determining a target avoidance trajectory that meets set constraints based on the target reference line and obstacle and road information in the surrounding environment of the vehicle; and controlling the vehicle to steer around the target based on the target avoidance trajectory.

The application discloses a method for installing a pod type full-rotation rudder propeller device on a total section, which comprises the following steps: 1) after welding of a section where the rudder propeller device is located is completed and precision detection is qualified, a flange cylinder assembly is installed on the section, and a reference line is drawn on the section; 2) a positioning reference line is drawn on the ground, and positioning installation of the section on the ground is completed by corresponding to the reference line on the section, the sections are aligned, and the total section is welded; 3) after welding of the total section is completed, reference positioning data on the total section is measured, and whether the deviation of the detected reference positioning data exceeds a set range is judged; 4) the rudder propeller device is hoisted to the flange cylinder assembly for positioning assembly; 5) the total section is hoisted to a dock for large closing welding; and 6) after welding of the total section is completed, each reference parameter on the total section is detected, and corresponding reference parameters on the dock or the berth are used for inspection and correction. By using the method, the total section integrity can be improved and the construction progress can be accelerated under the condition of ensuring the installation precision.

According to the reset switch provided by the utility model, the structure of the reset switch is improved, so that at least one technical effect of simplifying the reset switch, reducing the size of the reset switch and ensuring the accurate reset of the reset switch is realized. The reset switch comprises a driving assembly, a shifting piece, a triggering piece and a surface cover, the shifting piece is hinged to the surface cover through a shifting shaft, and the shifting piece can move downwards along with the surface cover to abut against the triggering piece and drive the triggering piece to rotate; the driving assembly comprises two magnetic attraction pieces, one magnetic attraction piece is fixed to the surface cover, the other magnetic attraction piece is fixed to the shifting piece, and the opposite magnetic poles of the two magnetic attraction pieces in the first direction are opposite and arranged at intervals; the two magnetic attraction pieces can be aligned along a reference line under the action of magnetic force, and the reference line extends in the first direction and penetrates through the axis of the shifting shaft.

The present invention provides a method and apparatus for selecting an intra interpolation filter for multi-line intra prediction based on a reference line index for decoding a video sequence. [Solution] The method includes: identifying a set of reference lines associated with an encoding unit; applying a first type of interpolation filter to reference samples contained in a first reference line adjacent to the encoding unit, based on the fact that a first reference line in the set of reference lines is associated with a first reference line index, to generate a first set of prediction samples; and applying a second type of interpolation filter to reference samples contained in a second reference line not adjacent to the encoding unit, based on the fact that a second reference line in the set of reference lines is associated with a second reference line index, to generate a second set of prediction samples.

The invention relates to an agricultural machine navigation diagonal harrowing path planning method and device, equipment and a medium. The method comprises the steps that two corresponding harrowing directions of an agricultural machine in a polygonal land parcel and the number of operation rows corresponding to each harrowing direction are obtained; determining two operation directions and a datum line of each operation direction; calculating the projection distance of each turning on each boundary of the polygonal plot according to the two operation directions and the datum line of each operation direction; determining a first operation row according to an operation starting point set by a user and any one of the two operation directions; and starting from the first operation line, searching the next optimal operation line of each operation line in the global path according to the determined projection distance and the turning mode of each type to obtain an optimal global path. By means of the method, fuel oil can be saved, the driverless tracking deviation can be reduced, and the field turning efficiency is improved.

The application discloses a grinding processing method for inner concave outer circle and end face, which comprises the following steps: grinding the inner concave outer circle and end face of a part to be processed by using a grinding wheel; the grinding wheel comprises a grinding wheel body and a connecting rod; one end of the connecting rod is connected to a grinding wheel frame, and the other end is connected to one end of the grinding wheel body; a grinding surface is arranged on the side surface of the grinding wheel body to grind the part to be processed; the central axis of the connecting rod and the central axis of the part to be processed have an inclination angle alpha; on the plane passing through the central axis of the part to be processed, the end face projection line is used as a reference line, the highest height of the inner concave outer circle projection line relative to the reference line is H, the diameter of the grinding wheel body is D, the diameter of the connecting rod is d, the length of the connecting rod is l, l<=3d is satisfied, and beta=90-alpha. The application has the advantages of high machining precision and high efficiency.

A method for using template based intra mode derivation (TIMD) with adaptive reference line selection is provided. A video coder generates a prediction of a template region neighboring the current block for each candidate intra mode in a set of candidate intra modes. Different sets of reference samples from different reference lines may be used for generating predictions for different candidate intra modes and / or different template regions. The video coder computes a difference value between reconstruction samples of the template region and the generated prediction of the template region for each candidate intra mode. The video coder derives an intra mode based on the computed difference values for the set of candidate intra modes. The video coder computes a predictor of the current block based on the derived intra mode and use the computed predictor to encode or decode the current block.

To provide a driver state determination method and its determination system capable of securing state determination accuracy while shortening a learning period.SOLUTION: A periphery information acquiring unit, a vehicle state acquiring unit, a visual field image creating unit 23 that creates a visual field image appearing in a field of view of a driver, a reference line-of-sight distribution generating unit 2 that generates in advance a reference line-of-sight distribution A based on a standard visual field image, an abnormality estimating unit 28 that compares a line-of-sight behavior distribution B with a reference line-of-sight distribution A corrected by using a second correction coefficient β that is learning information, a reliability setting unit 27a that sets a reliability N as learning data of the visual field image for generating the second correction coefficient β, and an abnormality determining unit 28 that determines an abnormality of the driver by comparing the reliability N as the learning data with a determination threshold value or more. And a learning restriction part 27 for executing learning based on the visual field image, and for restricting learning based on the visual field image when the reliability N as learning data is less than a determination threshold.SELECTED DRAWING: Figure 1

The application discloses a kind of unstructured scene under the method for dividing and generating reference line of passing boundary, it is related to the technical field of car intelligence planning, and its technical solution main points are: obtaining discrete path data, pre-processing, obtaining pre-processed data, and calculating the heading and curvature information of reference line;Receive road network information and input A* algorithm, obtain global rough path, convert global rough path from Cartesian coordinate system to Frenet coordinate system, then establish driving space node graph, input driving space node graph into dynamic programming algorithm, obtain left and right rough boundary, realize smoothing involving equality constraint initial solution in combination with quadratic programming model;Establish the kinematic model of vehicle motion of arc length parameter and discretization AL-iLQR solver combined with multi-constraint optimization, generate smooth reference line.The application significantly improves the path modeling efficiency and noise resistance, optimizes the real-time and safety of passing boundary smoothing, and efficiently generates kinematically feasible trajectory.

A page distortion correction method and system, an electronic device and a computer readable medium. The page distortion correction method comprises: determining a target text line to be corrected, and selecting a plurality of check points in the target text line, the plurality of check points satisfying that the connecting line of the plurality of check points is coincident with or parallel to a correction reference line when the page is not distorted; comparing the positions of the plurality of check points with the correction reference line, and calculating the offset amount of the check points to be corrected; and correcting each character of the target text line according to the calculated offset amount. The method is simple and efficient, has good restoration, strong adaptability, and the correction result is more stable.

The embodiment relates to a method and a technical device for implementing the method. The method comprises: identifying one or more reference lines; extracting a reference sample for the block through a reference line that is not adjacent to the block; intra prediction is performed on the block by a planar prediction process and the extracted reference samples, wherein the planar prediction process includes determining predicted samples according to a distance between a reference line and the block.

The application relates to a method and system for automatically monitoring horizontal displacement of a continuous tracking reference line method, which comprises the following steps: setting A point and B point as working base points, determining a reference line, setting n points as monitoring points, acquiring initial horizontal and vertical distances D of the monitoring points to the reference line through a total station, dividing the monitoring points into N groups, setting a laser emitter and a laser displacement sensor for each group of adjacent monitoring points, acquiring the abscissa of each monitoring point through the laser displacement sensor, calculating the horizontal displacement of each monitoring point according to the abscissa of each monitoring point this time and last time, and sending the horizontal displacement to a relevant monitoring data management platform. i The application has the beneficial effects that the horizontal displacement of a building foundation pit can be automatically monitored in real time, the workload of a measurer is reduced, and the real-time performance, reliability and accuracy of foundation pit monitoring are improved.