964 results about "Height difference" patented technology

The invention relates to the technical field of computer vision detection, and discloses a height feature information generation method, device and equipment based on point cloud and a medium, and the method comprises the steps: obtaining three-dimensional point cloud data of the surface of an object to be detected, carrying out the preprocessing of the data to obtain a target point cloud, and carrying out the reference plane fitting of the target point cloud, and calculating the vertical distance of each point in the target point cloud based on the reference plane obtained by fitting and generating height difference data, and finally extracting and outputting surface height feature information according to the height difference data. According to the method, the three-dimensional point cloud data is subjected to preprocessing noise removal, datum plane accurate fitting and height difference data separation, high-precision extraction of tiny height changes of a complex surface is achieved, the detection efficiency is improved, dependence on high-cost optical equipment is reduced, and the method is compatible with various workpiece shapes.

The invention provides an open caisson sinking control method based on dynamic balance of a soil resistance field, which comprises the following steps of: judging whether an open caisson posture dynamic balance condition is met or not according to an open caisson bottom surface soil resistance vector field and an open caisson posture offset, if not, intervening space distribution of the open caisson bottom surface soil resistance vector field, and reconstructing the open caisson bottom surface soil resistance vector field; the dynamic balance condition of the open caisson posture is met; and based on the open caisson bottom surface soil resistance vector field, the height difference vectors of the adjacent bins on the open caisson bottom surface and the soil taking control matrix, a dynamic decision objective function is constructed, the objective function is solved, an optimal soil taking control matrix is obtained, and an actuator cluster is controlled to take soil from the bins on the open caisson bottom surface. According to the method, the influence of dynamic evolution of the soil resistance field of the bottom face of the open caisson on the open caisson attitude offset is considered, the soil resistance field is dynamically adjusted, the open caisson attitude is accurately controlled, and soil taking control is optimized.

The embodiment of the invention relates to the technical field of automatic unstacking robots, and discloses an unstacking method and system, a controller and a computer readable storage medium, and the method comprises the steps: obtaining RGB image information and point cloud information of an ROI region through a 3D camera, recognizing a to-be-unstacked article in the RGB image information, and generating a grabbing point; the camera coordinates of the grabbing points, the length and width information of the box body of the top layer to be unstacked and the height information of the top surface of the box body are obtained through the point cloud information; and the grabbing step is executed, after the current grabbed box leaves the stack, the height difference of the original position of the current box is obtained through the 3D camera again, the detection height value of the current box is obtained, laser radar verification is selectively adopted according to different conditions, and finally efficient unstacking is achieved. By means of the technical scheme, the problem that in the unstacking process in the prior art, the detection efficiency and the operation precision are difficult to consider at the same time is solved.

The invention provides an anti-collision wafer taking method and system capable of recognizing wafer warping and a storage medium, and the method comprises the steps: arranging a contour collector on a vertical surface of a wafer of an aligner, collecting the contour point data of the wafer in the process that the wafer is rotated by the aligner, and obtaining the contour point data of the wafer; the center position determining module is used for determining the center position of the wafer, the eccentric distance between the center position and the wafer rotation center and the included angle between the projection position of the contour collector on the wafer surface and the direction of the wafer center and the wafer rotation center; according to the eccentric distance, the direction included angle and the known wafer radius, the theoretical distance from the wafer rotation center to the wafer contour is determined under the ideal condition that the wafer is not warped; according to the theoretical distance and the actual distance from the wafer contour to the wafer rotation center, the height difference between the ideal posture and the actual posture of the wafer is determined so as to judge the warping degree of the wafer, and the wafer taking height of the robot is correspondingly adjusted. Therefore, the manipulator is prevented from interfering with the wafer when taking the wafer.

The invention provides a mountain slope transmission system catenary determining method and device, and the method comprises the steps: obtaining the arrangement parameters of a transmission system on a mountain slope, and the arrangement parameters at least comprise the horizontal distance between two fixed points of the transmission system, the vertical height difference, and the total length of a rope of the transmission system; based on the arrangement parameters, a simultaneous equation with the catenary opening coefficient as a core unknown quantity is established, and the simultaneous equation comprises the arc length constraint of the catenary and the height difference constraint of the two end points at the same time; solving the simultaneous equation to obtain a numerical solution of the catenary opening coefficient; and determining a catenary shape and a core engineering index of the transmission system on the mountain slope under the action of gravity according to the solved catenary opening coefficient. According to the method and the device, the engineering design precision is improved, and material redundancy and adjustment cost caused by shape uncertainty are saved.

According to the parcel stack removing method and system on the stack removing device, the positions of parcels are detected on the basis of multiple sets of conveying belts with height differences, the positions of the parcels are corrected in combination with a compensation offset formula, and the positions of the parcels on the belts and corresponding speed information are accurately obtained; key indexes such as area distribution, number and positions (front section / middle section / tail section) of the packages on each section of conveyor belt are calculated; on the basis of key indexes, the speed of each section of belt is dynamically adjusted according to inverted-order calculation logic, and a targeted strategy is formulated by combining the parcel position (whether the parcel reaches the tail section or not), the downstream belt state (the number and area threshold) and the like; through accurate position compensation and correction, the problem of detection deviation caused by belt operation delay is solved; by means of reverse-order calculation and multi-gear speed control, dynamic matching of the speed of the upstream belt and the speed of the downstream belt is achieved, and secondary stacking is reduced; the cooperative operation strategy of the inlet conveyor belt avoids parcel slipping, and the delay starting rule of the fall belt reduces the overlapping risk.

The invention provides a calibration process and a calibration block of a contourgraph, and relates to the technical field of contour parameter calibration, in the calibration process of the contourgraph, first scanning data is obtained by scanning a gauge block calibration part of the calibration block, second scanning data is obtained by scanning a standard ball calibration part of the calibration block, and the first scanning data and the second scanning data are obtained based on a physical model among a probe, a rotating shaft and a sensor. The measuring height difference between the first calibration plane and the second calibration plane, the straightness of the inclined plane, the measuring diameter of the fitting circle, the actual height difference of the gauge block calibration part and the actual diameter of the standard ball calibration part are calculated, and the position relation among the probe, the rotating shaft and the sensor is calculated at least with the minimum straightness of the inclined plane as the constraint. The calibration data not only have the height of the gauge block and the diameter of the standard ball, but also introduce the straightness of the inclined plane, and the calibration data is increased, so that the calibration precision is improved, and the nonlinear error caused by the difference between a mechanical structure and a theoretical model can be reduced.

The invention belongs to the technical field of engineering surveying, and particularly discloses a river-crossing leveling method and system.The method comprises the steps that four control points are arranged on the two sides of a water area to be measured, each control point is provided with a centering rod tool, and each centering rod tool is integrated with an upper-layer prism and a lower-layer prism with the preset fixed vertical distance; a first total station and a second total station are erected on the two banks of the water area, upper-layer prisms and lower-layer prisms arranged on centering rod tools on the opposite banks are observed synchronously and oppositely, and vertical angle and slant distance data of all observation targets are obtained; and based on the vertical angle and slope distance data, a preset fixed vertical distance is used as a checking condition, and the height difference between the target positions on the two banks is solved. According to the method, the double-layer prism tool is introduced into a physical forced closing check condition, and traditional quadrilateral geometric closing check is combined, so that the data redundancy and the reliability of results are greatly enhanced, and system errors can be effectively identified and separated.

The invention provides a large-view-field-oriented dispensing method and system, and the method comprises the steps: obtaining imaging parameters of an industrial camera above a dispensing machine, controlling a dispensing head to carry out sparse sampling in the height direction, carrying out grid scanning at a plurality of discrete height layers, and obtaining object image mapping relation matrixes corresponding to the discrete height layers; acquiring the surface height of a to-be-dispensed workpiece, selecting the object image mapping relation matrix of the discrete height layer which is closest to the surface height of the workpiece and is smaller than or equal to the surface height of the workpiece as an initial object image coordinate conversion matrix of the workpiece, acquiring the image coordinate of the current dispensing point of the workpiece, and determining the dispensing point of the workpiece according to the height difference between the surface height of the workpiece and the selected discrete height layer. Obtaining a physical coordinate offset according to imaging parameters of the industrial camera; the initial position of the dispensing point is determined through sparse sampling, the offset of the dispensing point based on the initial position is determined based on the imaging geometrical relationship, the dispensing point can be rapidly and accurately positioned, and the efficiency and precision of dispensing operation are improved.

The invention relates to a continuous punch forming method for a disc spring with the compression amount of 70%, which comprises the following steps of: punching a positioning hole, punching an inner hole, chamfering the inner side, pre-stabbing the shape and blanking and forming, namely, pre-stabbing a circular processing area downwards to 60-70% of the thickness of a material belt according to the outline of the outer edge of the disc spring; and in the blanking forming step, the round machining area and the positioning connecting area are punched off, and the disc spring body is formed in the round machining area at the same station. In the pre-stabbing process, a height difference is generated between materials on the two sides of the outline through a mold, and then in the material tearing process, 30-40% of thickness connection can be reserved only when the tearing is not complete, so that the connection strength of the outline part is greatly reduced, but the circular machining area is still connected to the positioning connection area. In this way, the tensile stress in material flowing can be reduced in follow-up machining, and local thinning is avoided. Processing continuity is achieved, and operation efficiency is high. The obtained belleville spring with the compression amount of 70% is high in bearing capacity.

The invention discloses a stepped adjusting and cutting device for linear cutting equipment. The stepped adjusting and cutting device comprises a lower wiring groove roller, an upper wiring groove roller, a side rotating mechanism used for adjusting the state of the lower wiring groove roller and a platen. The device has the beneficial effects that the two lower wiring groove rollers are inclined downwards through the side rotating mechanism, the effect of forming an equal-height-difference stepped cutting structure for the distributed cutting lines is achieved, and a traditional horizontal equal-distance-distribution cutting line distribution mode is adjusted into a stepped equal-height-difference cutting line distribution mode; the effect of cutting one by one is achieved, the problem that a plurality of slice parts fall and collide at the same time is avoided, and operation reaction time difference is provided for follow-up implementation of ordered discharging; the saw dust wood frame is used for binding and fixing the bottom of the to-be-cut workpiece, the saw dust wood frame can be cut through the cutting line, the thoroughness of the cutting line cutting the bottom of the workpiece can be guaranteed, meanwhile, the stability of the remaining workpiece part in the cutting state can be maintained, and unnecessary cutting hindrance is reduced.

The invention belongs to the technical field of data processing, and particularly discloses an intelligent design method and device for long and short legs of an iron tower, electronic equipment, a medium and a program product. Generating a feasible solution space containing a tower leg length candidate set and a center pile adjustment height candidate set; the height of each candidate center pile is adjusted, a height difference matrix is constructed, the optimal tower leg length is determined through a conditional screening algorithm, and a leg matching scheme is formed; an error absolute value, an error variance and a center pile adjustment height are extracted as evaluation indexes, and after a comprehensive score is calculated through normalization and weighting, a scheme with the minimum score is selected. According to the method, automation and precision of iron tower long and short leg design are achieved, and design efficiency and scheme reliability are improved.

The invention relates to the technical field of material volume detection, and particularly discloses a hopper material volume detection method and device, and the method comprises the following steps: S1, employing a 3D camera to obliquely shoot a material in a hopper, and generating a 3D point cloud picture; s2, in the generated point cloud image, areas with holes are detected one by one, and then each hole area is filled, so that calibration of the 3D point cloud image is realized; and S3, starting material volume detection to obtain the height difference between the surface height of the material and the bottom of the hopper, and further calculating the volume of the material in the corresponding hopper according to the bottom surface information integral of the calibrated 3D point cloud picture.

The invention discloses a torsion guide structure for a rolled piece, and relates to the technical field of metallurgical steel rolling, the guide structure comprises guide roller assemblies arranged in pairs and an outlet guide used between finish rolling continuous flat racks, and the guide structure can utilize an asymmetric clamping area to pass through diagonal distribution of a plane working face and a semi-R arc-shaped working face; the semi-R arc-shaped working face is attached to the curved surface of one side of the rolled piece to form linear contact, the plane working face is in point contact with the other side of the rolled piece, and the height difference between the plane working face and the plane working face is matched to form a stable triangular constraint structure. According to the structure, the central axis of a rolled piece is always kept unchanged in the torsion process, the contact area is increased by 40%-50% compared with that of a flat roller, clamping force is distributed in a gradient mode in the circumferential direction of the section of the rolled piece, rigid extrusion of a symmetrical structure is avoided, tiny deformation of the rolled piece is absorbed through flexible contact of a plane working face, dynamic self-adaptive clamping is achieved, and the service life of the rolled piece is prolonged. And the torsion angle deviation is controlled within + / -2 degrees.

The invention relates to the technical field of bridges, and provides a linear control method for girder assembly in incremental launching construction, which comprises the following steps of: temporarily assembling a kth batch of girder sections according to a positioning height difference calculated value on a construction site, and determining an optimal space positioning parameter of a temporary stress-free linear shape when a girder section height difference measured value of each girder section is smaller than a preset threshold value; and welding the kth batch of beam sections, then carrying out incremental launching construction on the kth batch of beam sections in place, when the kth batch of beam sections is not the last batch of beam sections, obtaining a tail beam height difference measured value of the last beam section of the kth batch of beam sections, and determining a positioning height difference calculated value of the first beam section of the (k + 1) th batch of beam sections and positioning height difference calculated values of the remaining beam sections. According to the method, the splicing error construction of each batch is controlled, and the splicing construction of the next batch is guided through the correction of the actual tail end state after the pushing of the previous batch, so that the timely correction of the periodic linear error is realized, and the high-precision linear control of the main beam in the multi-round pushing construction is realized.

The invention provides a blanking system and a gantry crane, and relates to the technical field of engineering machinery. The blanking system is characterized in that a first conveying piece is arranged corresponding to a discharge port of the gantry crane; the second conveying assembly is movably arranged below the first conveying piece so as to convey materials output from the first conveying piece. The lifting parts are connected with the second conveying assembly, the lifting parts are used for corresponding to at least one of the multiple blanking points, and the lifting parts are used for ascending or descending when the blanking points are switched; and the second conveying assembly is configured to decelerate to stop when the blanking point is switched and the second conveying assembly moves from the current blanking point to the target blanking point to the deceleration area of the target blanking point, so that the lifting piece is correspondingly located above the target blanking point. According to the embodiment of the invention, through the second conveying assembly which is movably arranged, a large height difference is not needed, and material conveying to a plurality of material falling points is achieved.

The invention provides a land suitability evaluation method for a placement area under a large height difference condition, and the method comprises the steps: obtaining topographic data and planning constraint elements of the placement area, recognizing topographic features based on an elevation threshold value, and screening an initial land unit through a first evaluation unit constructed by historical data and topographic parameters; decomposing the initial unit, identifying a high-risk area, and performing optimization adjustment by using a second evaluation unit when a risk exists to form a planning scheme; in implementation, the first evaluation unit is regularly corrected according to updated topographic data, and the remaining schemes are dynamically adjusted. The first evaluation unit and the second evaluation unit optimize a land use sequence through a dynamic programming algorithm, and the connection weight is determined by weighting calculation of factors such as gradient, geological stability, traffic accessibility, vegetation coverage and catchment area. According to the method, the scientificity and safety of site selection of the placement area of the large-height-difference area can be improved.

The invention discloses a post-processing method for a binocular point cloud map containing low-speed dynamic obstacles, the post-processing method can effectively remove point cloud data of the low-speed dynamic obstacles in the point cloud map, and the post-processing method specifically comprises the following steps: S1, mapping in a working scene containing the low-speed dynamic obstacles, obtaining a prior map and data of a working scene; s2, constructing an auxiliary map by walking the same path again according to the mapping completion trajectory; s3, selecting a region of interest for each frame of auxiliary point cloud data and corresponding point cloud data in the prior map, then performing grid division on the region of interest and calculating a height difference descriptor; s4, comparing the height difference descriptor in the prior map with the height difference descriptor of the auxiliary point cloud data at the same position, and if the height difference descriptor of the auxiliary point cloud data is far smaller than the height difference descriptor in the prior map, considering that the point cloud data existing in the current prior map is low-speed dynamic obstacle point cloud data; and S5, performing ground fitting by adopting a region growing algorithm and a principal component analysis method, and deleting point cloud data on the ground in the current grid. According to the method, the point cloud data of the low-speed dynamic obstacles can be effectively removed from the point cloud map containing the low-speed dynamic obstacles, and more accurate and more real conditions are created for tasks such as working path planning of a subsequent robot.

This invention provides a leveling device for real estate surveying, relating to the field of leveling technology. The device includes a main body comprising an adjustment platform, an angle adjustment mechanism, a locking mechanism, and a calibration component. A first level and a second level are mounted on the surface of the adjustment platform. The bottom of the first level and the surface of the adjustment platform are screwed together as a single unit. An angle adjustment mechanism is mounted on the bottom of the adjustment platform. The surface of the adjustment platform has grooves and slotted holes. This leveling device can simultaneously project two horizontal lines and quickly calculate the height difference between different horizontal lines on the same vertical plane. It offers greater flexibility, simplifies surveying tasks requiring multiple horizontal lines, and improves the stability of horizontal line illumination. It can quickly calibrate and detect the levelness of the horizontal lines projected by the two levels, thus enabling timely detection of deviations in the levels.

A machine vision detection method includes receiving a three-dimensional image of a part to be detected including a first part and a second part, determining a plurality of sampling positions that satisfy sampling conditions, acquiring first sample data of the three-dimensional image of the first part at sampling positions and second sample data of the three-dimensional image of the second part at the sampling positions, calculating a first height difference between a plurality of first sample data and a second height difference between a plurality of second sample data, calculating a third height difference between the first sample data and the second sample data, and determining that the part to be detected is unqualified when any one of the first height difference, the second height difference, and the third height difference fails to meet a preset detection criterion.

The invention discloses an IC board warping degree and curved surface groove detection method based on a three-dimensional point cloud, and the method comprises the following steps: S1, collecting the point cloud data of the surface of an IC board through a three-dimensional imaging device, and carrying out the noise filtering, resampling and attitude normalization preprocessing; s2, nine key points distributed on the surface of the IC board are automatically extracted, a reference surface is generated through a curved surface fitting algorithm based on coordinates of the key points, and the height deviation value of each key point relative to the reference surface is calculated; according to the method, nine key points are selected on the surface of the IC Board, the global reference curved surface is generated by combining the curved surface fitting technology of the three-dimensional point cloud, and errors caused by local height anomaly or measurement noise are effectively avoided. Through the multi-dimensional analysis of the height difference between the central point and the edge point, the quantification of the warping degree is more comprehensive, the measurement result is more stable and reliable, and compared with a traditional single-point or linear measurement method, the method has higher precision and robustness.

The utility model particularly relates to a rapid track-on device for track equipment, which comprises a long plate device and a base device, and the base device comprises a base plate arranged at the bottom; the cylindrical supporting legs are vertically arranged on the base plate; the spherical shaft head is arranged at the upper end of the cylindrical supporting leg; the long plate device comprises a supporting plate arranged in the middle; the shaft sleeve is arranged at the bottom of the supporting plate and is provided with a hemispherical concave structure with a downward opening; the two long plates are arranged at the two ends of the supporting plate respectively, the long plates and the supporting plate are arranged in a perpendicular orthogonal relation, the thickness of the long plates is larger than that of the supporting plate, and a height difference is formed between the upper surfaces of the long plates and the upper surface of the supporting plate; and the hemispherical concave structure of the shaft sleeve is movably matched with the spherical shaft head, so that the long plate device is erected on the base device and is movably matched with the base device. The device has the advantages that the device is matched with the width of the steel rail, stable transfer of the device is ensured, and the stability and steering flexibility of the device are enhanced.

The invention provides a method for automatically adjusting the height of a vertical position detector assembly, a method for shooting a chest radiograph, equipment, a medium and a product. The method for automatically adjusting the height of the vertical position detector assembly comprises the steps that the first height between the lower jaw of a detected person and the ground is obtained; acquiring a second height between the vertical position detector assembly and the ground; calculating the height difference between the first height and the second height; a signal is sent to the vertical position detector assembly adjusting mechanism according to the height difference, and the vertical position detector assembly adjusting mechanism adjusts the height of the vertical position detector assembly according to the height difference. The technical problems that in the prior art, due to the fact that height adjustment of a traditional vertical position detector assembly depends on manual operation of medical staff according to experience, the adjustment process is time-consuming, the manual adjustment precision is not high, the image quality is inconsistent, and the workload of the medical staff is increased are solved. According to the method for automatically adjusting the height of the standing position detector assembly, automatic adjustment can be carried out according to the face image of the patient and the image of the standing position detector assembly.

The application relates to a ridge pressing roller device which comprises a first adjusting seat, a second adjusting seat and a ridge pressing roller body; the first adjusting seat comprises a movable adjusting rod, the lower end of the adjusting rod is connected with the ridge pressing roller body, one end of the second adjusting seat comprises a first rotating shaft, the ridge pressing roller body is arranged on the first rotating shaft, the other end of the second adjusting seat comprises a first fixing assembly and a second fixing assembly, the first fixing assembly and the second fixing assembly are connected through a second rotating shaft, the first rotating shaft is arranged on one end of the second fixing assembly, when the ridge pressing roller body moves up and down, the second rotating shaft enables the ridge pressing roller body to move up and down, and the adjusting rod provides a moving space for the ridge pressing roller body. The ridge pressing roller body of the application can move up and down along with the height difference of the ridge, so that the ridge pressing roller body of the ridge pressing roller device of the application can adapt to the uneven ridge, and the ridge pressing effect is better.

The application is a kind of fiber reinforced ceramic matrix composite surface three-dimensional roughness detection method and system, belongs to the technical field of material processing surface quality detection;Method is, first scanning fiber reinforced ceramic matrix composite processing surface to get the original processing surface three-dimensional model, and export point cloud data;Secondly, the coordinate transformation processing is carried out to the original three-dimensional model point cloud data, and the model is put right, the height difference of adjacent point cloud data is taken as the feature, the abnormal data points are screened and removed, the internal hole exposed on the processing surface is removed, the processing surface is reconstructed and the three-dimensional roughness S a Is calculated;Then determine the measurement area;Finally, according to the determined measurement area, the above scanning, hole removal, model reconstruction, S a The calculation work, namely the three-dimensional roughness of the processing surface is determined. The three-dimensional surface roughness value calculated by the application is no longer affected by the hole data, which ensures the effectiveness of the data.

The invention belongs to the field of urban renewal construction, and relates to a method for adjusting elevation and landing in place in building translation construction. In the process that a building returns and resets to a newly-built basement top plate, firstly, a temporary platform composed of a heightening steel beam and a heightening steel cushion block is laid on the newly-built basement top plate in advance so as to solve the height difference problem existing between the newly-built basement top plate and a translation rail. Secondly, triangular haunching plates are additionally arranged at the corners of the wall clamping beams for supporting the building; and a landing jack is directly arranged below the haunching plate. By means of the arrangement mode, the eccentric bending moment borne by the underpinning structure is greatly reduced, and absolute safety in the landing process is ensured. And finally, a set of repeatable standardized circulating steps is designed, and the effect that the existing building is always reliably supported in the landing process is achieved. The invention aims to overcome the defects in the prior art, and provides the building translation landing method which is safe to operate, accurate to control and capable of effectively coordinating the foundation height difference and optimizing the landing stress path.

The present invention provides a substrate processing apparatus and method capable of minimizing the effects of height differences between multiple heads. The substrate processing method includes: providing an inkjet head module having a first head and a second head; calculating a first height difference between the first head and the second head; and controlling, based on the first height difference, a first ejection velocity of a first chemical liquid ejected from the first head and a second ejection velocity of a second chemical liquid ejected from the second head so as to differ.

The invention provides a photoetching alignment mark, a preparation method, an alignment device and an alignment method, which can be applied to the technical field of photoetching alignment. The photoetching alignment mark comprises a plurality of first straight stripes which are periodically arranged on the upper surface of a first alignment surface along a first direction; the plurality of second straight stripes are periodically arranged on the lower surface of the second alignment surface along the first direction; the first straight stripe and the second straight stripe comprise step structures with the same height difference in the second direction, and are used for detecting a vertical gap and / or a deflection angle of the first alignment surface and the second alignment surface through reflected light interference; the projections of the step structures in the first direction are correspondingly overlapped, the periods of the first straight stripes and the second straight stripes in the first direction are complementary, and the projections of the step structures in the first direction are complementary. According to the method, the detection of the vertical gap and the deflection angle except for horizontal alignment can be realized, and the photoetching alignment efficiency and the multi-dimensional detection precision are improved.

This invention discloses a method for compensating for arc-extinguishing collapse at the extinguishing point of a single-pass multi-layer weld in arc additive manufacturing, relating to the field of arc additive manufacturing. The method includes: determining corresponding welding process parameters based on welding equipment, welding materials, and welding methods; designing a single-pass multi-layer weld experiment based on the corresponding welding process parameters; constructing a deep neural network with the process parameters as input and the difference between the weld's intermediate height and the arc-extinguishing height, and the compensation length at the collapse point as output; training and evaluating the neural network using experimental data to obtain a prediction model for the weld's arc-extinguishing collapse compensation length; collecting and inputting parameters from the weld formation process into the trained weld compensation prediction model, and outputting the corresponding height difference and compensation length, thereby achieving accurate prediction of the arc-extinguishing collapse compensation length for single-pass multi-layer welds in arc additive manufacturing. This invention effectively solves the defect of arc-extinguishing collapse, and experimental verification shows that the height flatness of the component is improved.

The objective is to minimize the height difference between the first and second floor sections and the independent boards, even when using thick independent boards to connect the first and second floor sections, and to limit the range of movement of the independent boards relative to the first or second floor section. [Solution] The floor expansion joint comprises a first floor section provided in one building, a second floor section provided in the other building, separated from the first floor section and arranged along the same floor surface as the first floor section, an independent plate positioned between the first and second floor sections and arranged along the floor surface, a support section attached to the first or second floor section and supporting the independent plate from below so that the independent plate can move along the floor surface, and a limiting section provided on the lower surface of the independent plate and limiting the range of movement of the independent plate relative to the support section.