156 results about "Straight segment" patented technology

The invention belongs to the technical field of reservoir dam line design, and provides an automatic determining method and system for a dam site of a whole-reservoir anti-seepage pumped storage reservoir. The method comprises the following steps: S1, extracting a contour line of a terrain curved surface corresponding to the elevation of a hydropower station; s2, selecting a contour line with the largest enclosed area range; s3, generating a convex hull for the selected contour line; s4, poles of the convex hulls are connected into a plurality of straight line sections li, the poles cut off the contour line into a plurality of curved line sections pli, and i closed areas are defined by the straight line sections li and the curved line sections pli; s5, selecting a closed area of which the volume is greater than a preset value V; s6, traversing a point j on the curve segment pli, drawing a vertical line nj from the point j to the straight line segment li, calculating the length hj of the vertical line nj, obtaining the length hijmax of the longest vertical line of each closed area, and calculating the ratio k of the hijmax to the straight line segment li; s7, setting a threshold value a, and selecting kgt; a closed area of a is used as a selected dam address. The method can accurately select sites, reduces man-made interference, and is suitable for various terrain environments.

The invention discloses a super-large broken line glass curtain wall installation method which comprises the following steps: based on curtain wall design parameters, obtaining deformation trends of a curtain wall in different installation stages, and based on the deformation trends, respectively determining deformation control thresholds of a straight line section component and a broken line node component of the curtain wall; adjustable hydraulic supporting tools are arranged in the installation area of the linear segment component and the installation area of the broken line node component respectively, and the adjustable hydraulic supporting tools are used for supporting glass plates of the linear segment component and the broken line node component; and staged installation is carried out according to the time sequence that the linear segment components are installed firstly and then the broken line node components are installed. Deformation trends of different installation stages are obtained in advance based on curtain wall design parameters, differentiated deformation control threshold values are set for the straight line section component and the broken line node component, and refined control over the rigidity sudden change area at the broken line node is achieved; the adjustable hydraulic supporting tool is arranged, and the supporting force is dynamically adjusted through the hydraulic rod.

The utility model discloses a tunnel combined type lining grating steel frame structure which comprises a plurality of first sections and two second sections, the arc-shaped first sections are sequentially connected end to end through first connectors to form an arch structure, and the two second sections are symmetrically arranged. The upper ends of the second sections are connected with the two ends of the arch structure through first connectors, and the lower ends of the two second sections are connected with second connectors. Wherein the central angle opposite to the first section is 30 degrees; the second section is composed of an arc-shaped section and a linear section, the upper end of the arc-shaped section is connected with the first connector, and the lower end of the arc-shaped section is connected with the second connector through the linear section. The construction mode that field assembly is carried out after prefabrication is adopted, the field construction difficulty is effectively reduced, and the construction efficiency is improved.

A cable handling bow (2) for an overboarding system of a work platform is proposed, wherein the cable handling bow (2) comprises a cable retaining structure (4) for retaining a length of a cable, wherein the cable retaining structure (4) extends along a partially curved path (6), which path (6) has a first end (8) and an opposed second end (10), wherein the path (6) has a first straight segment (14) located between the first end (8) and the second end (10) and being spaced away from both ends (8, 10), such that a cable joint connecting two ends of a cable is placeable in the first straight segment (14), when the cable length is retained in the cable retaining structure (4).

The invention discloses a screw taking-out device and a using method thereof, and belongs to the technical field of aeronautical manufacturing and maintenance, the screw taking-out device comprises a sleeve, a locking ring, a cylindrical rolling shaft and the like, the cross section of an inner hole of the sleeve is a similar triangle formed by connecting three linear sections and three arc sections at intervals, and the locking ring is provided with three strip-shaped cylindrical rolling grooves; and the cylindrical rolling shaft and the cylindrical rolling groove are combined and then are placed and limited in the inner hole of the sleeve. During use, the screw rod is inserted among the three cylindrical rolling shafts in the locking ring, the outer sides of the cylindrical rolling shafts are adjacent to the arc section of the inner hole in a non-extrusion state, the sleeve is rotated, the cylindrical rolling shafts slide to the linear section of the inner hole under the friction force action of threads of the screw rod, the screw rod is clamped by the cylindrical rolling shafts, and the sleeve is continuously rotated to screw out the screw rod. According to the screw disassembling device, when the screw is disassembled, torque applied to the screw acts on the axis of the screw, the screw is prevented from being broken in the rotating and taking-out process, and the disassembling work efficiency is not affected while the quality of a product fastened by a bolt is guaranteed.

The invention provides an arc thread double-end bolt assembly and a combined nut, and belongs to the technical field of bolt connection. The arc thread double-end bolt assembly comprises a double-end bolt, an embedded nut and a fastening nut, thread forms of external threads at the two ends of the double-end bolt comprise an outer thread top, a thread side linear section, a thread bottom arc and a thread side linear section which are sequentially connected, and the thread form angles of the external threads are all 60 degrees. The thread forms of the internal threads of the embedded nut and the fastening nut comprise a thread bottom arc, a thread side linear section, a thread top linear section and a thread side linear section which are connected in sequence, the thread form angle of the internal threads of the fastening nut is beta j, the thread form angle of the internal threads of the embedded nut is beta m, beta j is larger than beta m, and beta m is smaller than 60 degrees. The fatigue performance of the external threads at the two ends of the double-end bolt is different, the fatigue performance of the position, matched with the embedded nut, of the double-end bolt is better than that of the position, matched with the fastening nut, of the double-end bolt, when the double-end bolt is subjected to fatigue fracture, the fracture position is located at the position of the fastening nut more easily, and therefore the double-end bolt can be detached from a structural body conveniently, and on-site replacement operation is facilitated.

The utility model provides a sliding block component of a buffering sliding door and a buffering device, and is applied to the technical field of buffering sliding doors, the sliding block component is arranged in a sliding groove of a buffering frame in a sliding mode and connected with a buffering component, the sliding groove comprises a linear section and an arc section, and the sliding block component slides and rotates in the linear section and the arc section; and a connecting part is arranged at the rotating center, rotating in the arc section, of the sliding block part and used for being hinged to the buffering part, so that the buffering sliding door has the beneficial effects of being stable in structure and not prone to deformation.

1. The name of the design product: the side surface of a uniaxial robot. 2. The use of the design product: the uniaxial robot is used for automation equipment, and the side surface of the uniaxial robot serves as one side of the uniaxial robot. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view. 5. Other circumstances that need to be explained: the main protection of the design product is the partial design of the uniaxial robot. The gray part is the part claimed by the partial design, and the claimed design does not include the gray color, but includes the straight line segment green color arranged on the gray part. The blue part is the part not claimed by the partial design.

The application relates to the technical field of motion planning, and discloses a corner fairing method of an asymmetric Airthoid-arc, which comprises the following steps: constructing a tool path fairing curve which is sequentially connected by a first Airthoid curve, an arc and a second Airthoid curve, and is used for fairing a corner formed by adjacent straight line segments; preliminarily setting a first transition length and a second transition length according to the lengths of the line segments on the two sides of the corner; solving the first and second tangent angles according to geometric constraints, tangential continuity, curvature continuity constraints and position continuity constraints; if there is a solution, analytically calculating a current approximate error; and finally analytically calculating the curvature extreme value and the arc length of the fairing curve. The asymmetric curve structure is adopted, the corner space is fully excavated, the curvature extreme value is small, the arc length can be analytically expressed, and the profile error is controllable, so that the numerical control machining efficiency is improved.

The utility model relates to the technical field of chip production, and aims to solve the technical problem that the service life is shortened. In order to solve the technical problem, the utility model provides the diaphragm cylinder with the positioning function. A lower cover is provided with a groove body and a vent hole from top to bottom, and the groove body is communicated with the vent hole; the upper cover is connected to the top of the lower cover, a mounting groove and a sliding groove are formed in the bottom of the upper cover from bottom to top, and the mounting groove communicates with the sliding groove; the top wall of the mounting groove is sunken upwards to form a first groove hole, and a positioning pin is mounted in the first groove hole; the positioning pin is provided with a lower half part extending into the mounting groove, and the lower half part comprises a linear section and a conical section from top to bottom; a piston body of the piston is matched with the mounting groove; the guide part is matched with the sliding groove; a positioning pin hole is formed in the top of the piston body, the lower half part is located in the positioning pin hole, and the linear section is matched with the positioning pin hole and used for achieving positioning. And the diaphragm is hermetically connected between the lower cover and the upper cover. According to the utility model, the service life is prolonged.

An inner curve type PPU robot is characterized by: further comprising a support block, the support block being disposed inside three support bearings, and an oscillating contour surface being formed on the outer side of the support block, the oscillating contour surface comprising two symmetrically arranged C-shaped contour surfaces, the C-shaped contour surface comprising an arc segment and straight segments at both ends of the arc segment, and the distance of the arc segment from the rotation center of the main shaft being greater than the distance of the straight segments from the rotation center of the main shaft; when the oscillating wheel moves, the three support bearings and the oscillating contour surface are always in contact to form a rolling fit, and the oscillating wheel drives the linkage shaft to move along the C-shaped trajectory. Its advantages are: 1. The support block is set inside the three support bearings. Compared with the cycloidal frame in the prior art, the outer curved surface is changed to the inner curved surface, making the structure more compact and reasonable, and greatly reducing the volume; 2. The C-shaped contour surface includes an arc segment and two straight segments. Compared with the rounded square trajectory in the prior art, the movement of the swing wheel will be more continuous; 3. The support bearing has a higher speed and greater torque when passing through the straight segment, which reduces the influence of gravity and makes the movement more stable. The support bearing has a lower speed and faster speed when passing through the arc segment, which increases the running speed and makes the movement more rapid.

The present invention provides a Ribas rope groove positioning device, which includes a straight-line segment guiding component and an inclined-line segment guiding component. The straight-line segment guiding component includes a first connecting plate and a first fixing member. A plurality of first guiding grooves are provided at the bottom of the first connecting plate. The first guiding grooves match the straight-line segment round steel, and the center line of the first guiding grooves is parallel to the tangent of the drum. The first fixing member is used to connect both ends of the first connecting plate to the drum wall; the inclined-line segment guiding component includes a second connecting plate and a second fixing member. A plurality of second guiding grooves are provided at the bottom of the second connecting plate. The second guiding grooves match the inclined-line segment round steel, and the included angle between the center line of the second guiding grooves and the tangent of the drum is an acute angle. The Ribas rope groove positioning device according to the embodiment of the present invention has a simple structure, is convenient for disassembly and assembly, reduces the positioning difficulty of the straight-line segment round steel and the inclined-line segment round steel, and further improves the Ribas rope groove positioning accuracy.

The present application relates to the technical field of numerical control machining.A three-axis linkage operation method capable of self-adapting to realize arbitrary orientation movement includes the following steps: the whole process is virtually three straight line movements: ABE, EF and FCD, and the velocities, accelerations and the like of each endpoint A, E, F and D are all 0, the BE segment is pure deceleration movement, FC is pure acceleration movement, and they perform superimposed movement with EF in different time periods, so that the intermediate "frogs' leap" curve is obtained AB +t EF +t CD . Wherein A, B, C and D are four fixed points initially set according to machining requirements, A and D are respectively start and end points, AB and CD are respectively linear segments with limited trajectories, and E and F are respectively points on the extension lines of the linear segments AB and DC. The technical scheme of the present application realizes the shortest whole process movement time of the movement target, has no large corner in the movement process, has no frequent deceleration processing, and has short operation time.

The application relates to the technical field of cutting tools, in particular to a cutting blade and a cutting tool. The cutting blade comprises a central shank and a cutting head; the cutting head comprises a rake face, a relief face, a bottom face and a chip breaking structure located on the rake face; a cutting edge formed by the rake face and the relief face comprises two edge straight line segments formed by a first rake face and the relief face, two first edge circular arc segments formed by a first circular arc transition face and the relief face and a second edge circular arc segment formed by a second rake face and the relief face; when viewed along the length direction of the central shank towards the relief face, the middle part of the second edge circular arc segment is concave downwards, and the two sides are connected to the edge straight line segments upwards through the first edge circular arc segments. The cutting edge of the application is concave in the overall shape, effectively reduces the cutting resistance during cutting processing, thereby inhibiting the vibration between the cutting edge and the workpiece and improving the machining precision. The cutting blade has certain edge strength while ensuring the sharpness of the edge.

A staple includes a crown section including a first curve, a second curve, a third curve, a first straight segment extending between the first curve and the second curve, and a second straight segment extending between the first curve and the third curve. The second curve and the third curve define, respectively, opposite ends of the crown section. The staple includes a pair of leg sections extending from the opposite ends of the crown section.

The invention discloses a small-size sealing tooth machining tool, a design method and a machining method, and belongs to the technical field of tool design, the sealing tooth machining tool comprises a tool body and a blade, the length of the tool body is larger than the height H of a sealing tooth, and the side face angle of the tool body is larger than the tooth side angle C; the cutting edge is an arc cutting edge arranged at the lower end of the cutter body, and the radius of the cutting edge is a transition fillet R of the tooth side and the tooth bottom of the sealing tooth; the length m of a straight section between arcs of the cutting edge is determined according to the length of a straight section M at the bottom of the sealing tooth; when the length of the straight line section M at the bottom of the sealing tooth is less than 0.5 mm, the cutting edge is a spherical cutting edge; when the length of the bottom straight line section M of the sealing tooth is larger than 0.5 mm, the length m of the straight line section between the arcs of the cutting edge is M-0.5 mm; the cutter effectively solves the technical problem of blade breakage caused by insufficient cutter strength in the machining process of a traditional cutter through multi-dimensional innovative design, and has high use value and popularization value.

The invention discloses an overturning tool assembly and method for ultra-large disc parts. The turnover tool assembly comprises a turnover transfer tool, a transfer hook and a temporary storage part; the turnover transfer tool comprises a bottom plate, the bottom plate is provided with a fixing assembly used for fixing parts from the middle and / or the edge, the periphery of the bottom plate is provided with a plurality of supporting legs, the supporting legs are located on the hoisting side and the turnover side respectively, the supporting legs on the hoisting side are provided with hanging rings, the supporting legs on the turnover side are provided with arc-shaped edges facing the turnover side, and the arc-shaped edges face the periphery of the bottom plate. And a linear section is arranged in the middle of the arc-shaped edge and is perpendicular to the bottom plate. The problems that parts are difficult to fix and blades are prone to deformation are solved, and damage to the blades by external force is avoided through accurate positioning and stable clamping; the overturning resistance is reduced through the overturning side arc-shaped supporting legs, the gravity center in the overturning process is effectively balanced in cooperation with the reasonable position design of the hoisting side lifting ring, and the potential safety hazard that inertia instant overturning or manual intervention is needed due to gravity center shifting is avoided.

The utility model discloses a space avoidance hinge in the hardware technical field, including door frame, door board and hinge module, the door board is assembled in the door frame inside through the hinge module with axial connection mode, the hinge module contains mirror image symmetry's upper hinge group, lower hinge group, in the upper hinge group, the integrative first upper hinge processes the inside, outside limit guide rail that is parallel to each other, and two movable bearings of second upper hinge installation are accurate adaptation with it, and the bottom of door frame is equipped with the adaptation sink groove, and forms double positioning with the outside limit guide rail, through such structural design, can firm connection door board and door frame and accurate guidance door board movement, when door board opening, first along the guide rail straight line section smooth translation, and then along the arc segment smooth rotation to 90 degrees, make door board thickness completely hide, this design not only has promoted the space utilization, also satisfies the strict requirement of high sealing place, has improved the defect of traditional hinge in space utilization and sealing performance greatly.

The present application relates to the technical field of sealing strip rubber sleeve conveying, and discloses a sealing strip rubber sleeve conveying device and a conveying method, the conveying device comprising: a rubber sleeve conveying belt, the rubber sleeve conveying belt comprising: a plurality of straight line segments, in polygonal distribution. The present application places a plurality of rubber sleeves on the first straight line segment in sequence, so that the plurality of rubber sleeves are conveyed along the plurality of straight line segments and the plurality of arc-shaped segments, and finally the plurality of rubber sleeves are arranged on the plurality of straight line segments respectively; since the plurality of straight line segments and the plurality of arc-shaped segments form a rotary structure, the corners of the plurality of rubber sleeves can be all directed towards the center of the rotary structure. The rotary structure can change the direction of the corners of the rubber sleeves, and no additional reversing line body is needed; the conveying device is highly integrated, occupies a small area, and greatly reduces the investment cost required by the device.

The invention relates to the technical field of metal processing and mechanical manufacturing, and discloses a pipe cutting device for frame production, which comprises a table top, a support rod I, a support rod II, a cutting knife, a reciprocating transportation mechanism and a rotary cutting mechanism, and is characterized in that the reciprocating transportation mechanism is arranged to synthesize composite motion with a specific time sequence, so that the cutting efficiency is improved; horizontal feeding and vertical jacking and falling actions are fused in a compact cycle; when the small gear rolls along the straight line section of the circular gear column, accurate horizontal pushing of the pipe material is achieved, and the accuracy of fixed-length feeding is ensured; when moving to the arc-shaped sections at the two ends of the special-shaped sliding groove, the combined gear mechanism triggers the vertical displacement of the whole combined gear mechanism, the upper supporting plate is jacked up or put down through the long rod, grabbing and releasing of pipes are completed, an independent lifting driving element can be omitted, and more importantly, strict synchronism and high repeated positioning accuracy of the feeding process and the cutting action are guaranteed; and the cutting length error and the equipment clamping stagnation risk caused by unstable feeding are fundamentally overcome.

The application relates to a high-continuity appearance surface processing technology and device, and belongs to the technical field of surface processing, and comprises the following contents: S1: curvature distribution data of a charging port cover edge is acquired in real time through three-dimensional laser scanning, and a partition geometry model containing a straight line segment, a small fillet segment and a large fillet segment is established; S2: based on the curvature distribution data, polishing assembly is adjusted to adaptively adjust polishing areas of the straight line segment, the small fillet segment and the large fillet; S3: based on the partition geometry model, the polishing assembly is adjusted to polish the straight line segment, the small fillet segment and the large fillet segment in sequence, through a curvature-adaptive dynamic processing system, a technical bottleneck of traditional fixed-parameter polishing is broken, high precision of a complex curvature surface is realized, and the high-continuity appearance surface requirement of the charging port cover can be guaranteed.

The invention provides an arc threaded connection pair, and belongs to the technical field of threaded connection. The arc thread connection pair comprises an external thread and an internal thread which are both arc threads, and the thread form of the external thread comprises an external thread crest arc, an external thread flank linear section, an external thread root arc and an external thread flank linear section which are connected in sequence. The tooth form of the internal thread comprises an internal thread root arc, an internal thread flank linear section, a transition arc and an internal thread crest linear section which are connected in sequence, and the transition arc is tangent to the external thread root arc. The contact point of the internal thread and the external thread is closer to the tooth bottom of the external thread, and the equivalent force arm between the contact point and the tooth bottom of the external thread is shorter, so that the torque borne by the tooth of the external thread is reduced, the opening effect of the tooth of the internal thread on the tooth of the external thread can be weakened, the stress concentration of the tooth bottom of the external thread is reduced, and the fatigue performance of the external thread is improved.

The invention provides an aqueduct construction method. The aqueduct construction method comprises the following steps that S1, an aqueduct is divided into a straight line section and a curve section; s2, calculating a central angle alpha of the second groove body; s3, dividing the straight line segment into a first straight line segment and a second straight line segment; a prefabricated groove field is built on the first straight line section; s4, supports are installed at the tops of the cushion blocks of the two adjacent pier columns, then a groove body left end mold, a groove body right end mold and a groove body mold plate of a first groove body are installed, prefabrication of the first groove body is conducted, and all prefabrication of the first groove body and assembly construction of a second straight line section are completed; s5, clockwise rotating the left end mold of the groove body by 0.5 alpha, anticlockwise rotating the right end mold by 0.5 alpha, adaptively moving and adjusting top supports of two adjacent pier columns in the longitudinal groove direction, mounting a groove body mold plate of a second groove body, and then completely prefabricating the second groove body and assembling and constructing a curved section; and S6, assembling construction of the first straight line section is completed. The construction efficiency of aqueduct construction is improved.

According to the long-term storage transverse folding and unfolding rudder sheet mechanism and the unfolding method, the design of the transverse folding and unfolding rudder sheet mechanism is provided, transverse initial stable locking of a rudder sheet is achieved through a front linear section of a cam, unfolding of the rudder sheet is achieved through an actuator cylinder, a push rod, a cam curve and the rudder sheet, and locking of the tail position of the rudder sheet is achieved through a rear linear section of the cam after the rudder sheet is in place; the long-term storage reliability is guaranteed by taking gunpowder as driving energy, and the flight process is stable and reliable by the mechanism. The structure is simple and reliable, and implementation is convenient.

The present invention provides an integrated tail cover for loading and unloading ammunition, comprising: a tail cover and a projectile locking and releasing mechanism integrated on the tail cover; two loading and unloading hook bases symmetrically mounted on the tail cover; a straight segment of the loading and unloading hook is rotatably connected to the loading and unloading hook base; a curved hook of the loading and unloading hook is used to hook the edge of the wing plate of the mine-killing projectile; a connecting handle is fixedly connected to the other end of the straight segment of the two loading and unloading hooks; by pressing the connecting handle, the loading and unloading hook rotates about its connection point with the loading and unloading hook base, thereby locking or releasing the curved hook on the wing plate; a handle is also fixedly connected to the tail cover, which facilitates lifting the handle to place or remove the mine-killing projectile locked on the tail cover into or out of the ammunition tube; a positioning hole I and a positioning hole II are provided on the loading and unloading hook, and a through hole is provided on the loading and unloading hook base corresponding to the locking position and the release position; a safety pin is inserted into the positioning hole I or the positioning hole II to limit the loading and unloading hook. The present invention can be used to load and unload ammunition without special tools, is simple to operate, and can effectively improve work efficiency.

The invention provides an arc threaded connection pair, and belongs to the technical field of threaded connection. The arc threaded connection pair comprises an internal thread and an external thread which are both arc threads, the included angle between an external thread side linear section and a plane perpendicular to the axis of the external thread is # imgabs 0 # internal thread, and at least all internal thread side linear sections, close to one axial end, in the thread form of the internal thread are adduction linear sections with the included angle smaller than # imgabs 1 # internal thread and the plane perpendicular to the axis of the internal thread. The intersection point of the adduction straight line section and the inner crest straight line section and the outer tooth side straight line section and the contact point are located on the side, closer to the axis of the outer thread, of the middle point of the outer tooth side straight line section, or the intersection point of the adduction straight line section and the inner crest straight line section is in arc contact with the outer tooth bottom, and the contact point is closer to the tooth bottom of the outer thread; the force arm between the contact point and the external thread root is shorter, so that the torque borne by the external thread tooth is reduced, the opening effect of the internal thread tooth on the external thread tooth can be weakened, the stress concentration of the external thread root is reduced, and the fatigue performance of the external thread is improved.

The present invention relates to a tibial liner. The tibial liner includes a medial articular surface and a lateral articular surface. The cross-sectional line formed by the intersection of the medial articular surface and a first sagittal plane includes a first arc, a first straight line segment, and a second arc connected in sequence. The radius of curvature of the first arc is greater than or equal to the radius of curvature of the second arc. The cross-sectional line formed by the intersection of the lateral articular surface and the second sagittal plane includes a fourth arc, a second straight line segment, and a fifth arc connected in sequence. The radius of curvature of the fourth arc is greater than or equal to the radius of curvature of the fifth arc. The tibial liner has good stability.

A method for rapidly achieving the unfolding length of a bent pipe with a flange comprises the steps that a straight pipe is divided into a reserved flange interference prevention distance L1, a straight line section L2, a bent part L3, a straight line section L4 and a reserved flange interference prevention distance L5, repeated bending is conducted till the rebound angle measured after current bending rebound meets the precision requirement, and then the bent pipe with the flange is obtained. And the unfolding length of the bent section L3 and the unfolding length of the whole bent pipe corresponding to the bent section L3 are calculated according to the current rebound angle. According to the method, the unfolding lengths of pipes of different materials and different sizes can be rapidly and accurately calculated, the problem that the bent pipe with the flange cannot be installed due to the fact that the length error is too large during installation is solved, the bending forming quality and forming efficiency can be remarkably improved, the production cost is reduced, and the production efficiency is improved. The method has important engineering application value and obvious economic benefits in the engineering fields of ships, aerospace, automobiles and the like.

The present invention relates to a method for detecting the height and width of a circumferential weld of a straight segment of a pipeline, comprising the following steps: obtaining point clouds of the pipeline weld and the straight segments before and after the weld; fitting small cylinders segment by segment with the weld design width as a step size; iteratively fusing adjacent cylindrical segments with similar radii to separate the straight segment and the weld rough positioning segment; calculating the distance from the weld rough positioning segment point cloud to the straight segment cylinder axis to obtain the precise positioning of the weld; calculating the difference between the maximum distance from the weld point cloud to the pipeline axis and the pipeline radius to obtain the weld height; projecting the weld point cloud onto the pipeline axis to obtain a new projected point cloud, calculating the maximum distance between the points in the projected point cloud to obtain the weld width. The present invention can detect the height and width of the circumferential weld of a straight segment pipeline weld, providing a new method for automated detection of the height and width of the circumferential weld of a straight segment pipeline.

The invention relates to a retaining device (201) comprising a base (202) having at least one retaining pattern (M) comprising at least two retaining zones (207, 207a, 207b, 207c, 207d, 207e, 207f), each provided with retaining elements (205), the retaining pattern being delimited by two opposite longitudinal edges (212a, 212b), the two retaining zones being arranged in such a way that any straight segment (L) extending in a second direction (Y) from a first longitudinal end edge (209a) to a second longitudinal end edge (209b) crosses at least one of the two retaining zones, the base comprising at least one zone without retaining elements (208, 213a, 213b) and having at least one transverse portion (208) extending continuously on the first face (203) of the base (202) from a first longitudinal edge (212a) to a second longitudinal edge (212b) of the retaining pattern.