CN109708574B - Pipeline space dimension measuring system - Google Patents
Pipeline space dimension measuring system Download PDFInfo
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- CN109708574B CN109708574B CN201910138811.0A CN201910138811A CN109708574B CN 109708574 B CN109708574 B CN 109708574B CN 201910138811 A CN201910138811 A CN 201910138811A CN 109708574 B CN109708574 B CN 109708574B
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Abstract
The invention is suitable for the technical field of pipeline measuring devices, and provides a pipeline space dimension measuring system which comprises a handheld measuring instrument, a dimension capturing and analyzing device and a clamping mechanism, wherein the dimension capturing and analyzing device is used for capturing and identifying a track of the handheld measuring instrument and analyzing the track to obtain the space dimension of a measured bent pipe, the clamping mechanism is used for installing and fixing the measured bent pipe pipeline, the handheld measuring instrument comprises a measuring instrument body, a grooved wheel and an identification component, the grooved wheel is in rolling fit with the measured bent pipe, the grooved wheel is rotatably connected with the measuring instrument body, and the identification component is arranged on the measuring instrument body. According to the pipeline space dimension measuring system provided by the invention, the handheld measuring instrument capable of sweeping the measured pipeline and the dimension capturing and analyzing device capable of capturing, identifying and analyzing the track of the identification component are arranged, so that the space dimension of the measured elbow is obtained through fitting calculation, the measuring efficiency is high, the requirement on manual operation is low, and the measurement is accurate.
Description
Technical Field
The invention belongs to the technical field of pipeline measuring devices, and particularly relates to a pipeline space dimension measuring system.
Background
With the development of manufacturing technology, pipeline design is widely applied to military industry and civil manufacturing industry, and in order to maximize processing precision, the spatial geometry of the formed bent pipe needs to be accurately measured, and correction or reconstruction is performed on the basis. The traditional method for detecting the contour quality of the bent pipe is complicated and inaccurate, the whole contour of the bent pipe is difficult to redraw, and a new technology needs to be designed to obtain the outer contour of the bent pipe so as to solve the problem of detecting the contour of the bent pipe.
At present, a mode-dependent method and a three-coordinate measuring instrument are mainly adopted for measuring the space geometric shape after pipeline processing at home and abroad.
The measurement result by the die method is visual, but only the rough inspection of the shape of the pipeline can be realized, the universality is not strong, the workload is increased compared with the manufacture of a die, and the measurement result is also different from person to person. The three-coordinate measuring instrument has high measurement precision, but has strict requirements on measurement environment and limited measurement range. Corresponding special clamps are required to be manufactured for different pipelines to be tested, and the cost is high. The requirement on measuring personnel is high, certain operation experience is required, and the measuring process is time-consuming and labor-consuming. The common defects of the above measurement methods in pipeline measurement are that a large amount of manual operation is required, and the measurement efficiency for complex pipelines is very low.
Disclosure of Invention
The invention aims to provide a pipeline space dimension measuring system, and aims to solve the technical problems of high technical requirements on measuring personnel and low measuring efficiency in the process of measuring a pipeline in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: a pipe space dimension measurement system comprising:
the handheld measuring instrument comprises a measuring instrument body, a grooved wheel and an identification component, wherein the grooved wheel is used for being in rolling fit with a measured bent pipe, the grooved wheel is rotationally connected with the measuring instrument body, and the identification component is arranged on the measuring instrument body;
the size capturing and analyzing device is used for capturing and identifying the track of the identification component and analyzing the track to obtain the space size of the bent pipe to be measured; and
and the pipeline clamping mechanism is used for installing and fixing the bent pipe to be measured.
Further, the grooved wheel comprises a wheel body, and the wheel body is provided with a v-shaped ring groove which is used for being tangent to the bent pipe to be measured and arranged along the circumferential direction of the bent pipe to be measured.
Further, the measuring instrument body is provided with an accommodating space, the identification assembly comprises a light-emitting body, a power supply and a mask plate, the light-emitting body, the power supply and the mask plate are arranged in the accommodating space, the mask plate is installed on the measuring instrument body, the power supply is electrically connected with the light-emitting body, emergent light rays of the light-emitting body can penetrate through the light-emitting hole of the mask plate to form a target, and the size capturing and analyzing device captures and identifies the track of the target and then analyzes the space size of the bent pipe to be measured.
Furthermore, the pipeline clamping mechanism comprises a rack and a plurality of fixing components for movably fixing the bent pipe to be measured, and the fixing components are movably arranged on the rack.
Further, the fixing assembly comprises a first sliding block capable of being adjusted transversely relative to the rack, a second sliding block capable of being adjusted longitudinally relative to the first sliding block, and a fixing piece arranged on the second sliding block and used for fixing the bent pipe to be measured.
Further, the fixing piece is a clamping block provided with a v-shaped clamping groove, and the clamping block is connected with the second sliding block through a second bolt.
Furthermore, the fixing piece is a semicircular elastic hoop which is used for being elastically clamped with the bent pipe to be measured, and the elastic hoop is fixedly connected to the second sliding block.
Further, pipeline space dimension measurement system still includes the return bend tip positioner that is used for setting up at the elbow end that is surveyed, return bend tip positioner including be used for with the coupling mechanism of the tip swing joint of the elbow that is surveyed and be used for with the butt of the elbow that is surveyed and be used for with the sheave butt cooperation confirms the fender body of the elbow end position that is surveyed, keep off the body with coupling mechanism links to each other.
Further, the connecting mechanism comprises a first clamping block, a second clamping block and a screw rod which are used for being abutted to the inner wall of the bent pipe to be measured respectively, a first threaded hole is formed in the first clamping block, a second threaded hole is formed in the second clamping block, the thread turning directions of the first threaded hole and the second threaded hole are opposite, a first external thread and a second external thread which are in threaded connection with the first threaded hole and the second threaded hole respectively are arranged on the screw rod, and the connecting mechanism drives the first clamping block and the second clamping block to be abutted to the inner wall of the bent pipe to be measured by means of rotation of the screw rod.
Further, the size capturing and analyzing device comprises a CCD camera for capturing and identifying the track of the identification component and an analyzing module for analyzing and obtaining the spatial size of the elbow to be measured according to the track signal captured and identified by the CCD camera, and the analyzing module can be communicated with the CCD camera.
According to the pipeline space dimension measuring system provided by the invention, the handheld measuring instrument capable of sweeping the measured pipeline and the dimension capturing and analyzing device capable of capturing, identifying and analyzing the track of the identification component are arranged, so that the space dimension of the measured elbow is obtained through fitting calculation, the measuring efficiency is high, the requirement on manual operation is low, and the measurement is accurate.
Drawings
FIG. 1 is a schematic diagram of a pipeline dimensional measurement system according to an embodiment of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
FIG. 4 is an enlarged view at C of FIG. 3;
FIG. 5 is a schematic diagram of a hand-held measuring device in a pipeline spatial dimension measuring system according to an embodiment of the present invention;
FIG. 6 is a second schematic diagram of a handheld measuring device in a pipeline spatial dimension measuring system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a sheave attachment bracket and a sheave of one type in a pipe space dimension measurement system according to an embodiment of the present invention;
FIG. 8 is a schematic view of another type of sheave attachment bracket and sheave in a pipe space dimension measurement system according to an embodiment of the present invention;
FIG. 9 is a schematic view of the elbow end position determining device of FIG. 1;
FIG. 10 is a schematic view of an application of the elbow end positioning device;
fig. 11 is a schematic diagram of an elastic hoop in a pipeline space dimension measurement system according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a method for determining the coordinate position of the sheave rotation center in the coordinate system of the marking assembly (target of mask plate) by the pipeline space dimension measuring system according to the embodiment of the present invention;
fig. 13 is a second schematic diagram of the method for determining the coordinate position of the sheave rotation center in the coordinate system of the marking assembly (target of mask plate) by the pipe space dimension measuring system according to the embodiment of the present invention;
fig. 14 is a third schematic diagram of a method for determining a coordinate position of a sheave rotation center in a coordinate system of a marking assembly (target of a mask plate) by a pipeline space dimension measuring system according to an embodiment of the present invention.
In the figure: 1-a frame; 2-camera attachment frame; 3-industrial CCD cameras; 4-a first bolt; 5-a first slide block; 6-a guide post; 7-a hand-held meter; 8-a second bolt; 9-a clamping block; 10-a second slide; 11-bending the pipe to be measured; 12-grooved pulley connecting frame inclined plate; 13-a nut; 14-mounting bolts; 15-rolling bearings; 16-sheave; 17-a first screw; 18-a battery well; 19-a self-reset switch; 20-a luminophore; 21-a light-diffusing plate; 22-a mask plate; 23-cell slot cover; 24-a second screw; 25-elastic hoop; 26-a first fixture block; 27-a second cartridge; 28-rivets; 29-a hinge; 30-positioning plate; 31-a screw; 32-a third screw; 33-cylindrical pin; 34-grooved pulley connecting frame vertical plates; 35-assay target plate; 36-magnet.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, fig. 2, fig. 3, fig. 5 and fig. 6, an embodiment of the pipeline space dimension measuring system provided by the present invention will now be described. Pipeline space dimension measurement system is including handheld measuring apparatu 7, size capture analytical equipment and pipeline clamping machine structure. The pipeline clamping mechanism is mainly used for installing and fixing the bent pipe 11 to be measured, so that the pipeline position is prevented from moving in the measuring process, and the handheld measuring instrument 7 can conveniently perform sweeping measurement.
The handheld measuring instrument 7 comprises a measuring instrument body, a grooved wheel 16 and an identification component, wherein the grooved wheel 16 is in rolling fit with the measured elbow 11, the grooved wheel 16 is rotatably connected with the measuring instrument body, and the identification component is arranged on the measuring instrument body.
And the size capturing and analyzing device can capture the track of the identification component and analyze and process the track information, so that the space size of the bent pipe to be measured is drawn.
During testing, the pipe diameter of the measured bent pipe 11 and the coordinate position of the rotation center of the grooved pulley 16 in the coordinate system of the identification component are known or well measured, an operator firstly fixes the measured pipe 11 on the pipe clamping mechanism, then the operator only needs to hold the handheld measuring instrument 7 by hand, and the outer edge of the measured bent pipe 11 is swept along the winding direction of the measured bent pipe 11 by utilizing the rolling contact matching of the grooved pulley 16 and the measured bent pipe 11, so that the whole operation is very simple, and much professional technical training of the operator is not needed. Along with the movement of the handheld measuring instrument 7, the size capturing and analyzing device can capture and identify the track of the identification component, the size capturing and analyzing device records the position of the identification component in real time by applying the principle of combining contact measurement and visual measurement, points on the axis of the bent pipe corresponding to the tangent position of the grooved pulley 16 and the bent pipe 11 to be measured are obtained through conversion calculation at each moment, the direction of the axis of the bent pipe 11 to be measured is obtained through a series of point fitting calculation, the contour of the bent pipe is finally obtained, the redrawing of the three-dimensional shape of the pipeline is realized, and the whole measurement and size drawing process is very quick, simple.
According to the pipeline space dimension measuring system provided by the embodiment of the invention, the handheld measuring instrument capable of sweeping the measured pipeline and the dimension capturing and analyzing device capable of capturing, identifying and analyzing the track of the identification component are arranged, so that the space dimension of the measured elbow is obtained through fitting calculation, the measuring efficiency is high, the requirement on manual operation is low, and the measurement is accurate.
Referring to fig. 1, fig. 3, fig. 14, and fig. 5 to fig. 8, as a specific embodiment of the pipeline space dimension measuring system provided by the present invention, the grooved wheel 16 includes a wheel body, a circle of v-shaped ring groove is provided along the circumference of the wheel body, the v-shaped ring groove is adapted to the dimension of the measured elbow 11, that is, two side walls of the v-shaped ring groove are in contact with and tangent to the measured elbow 11, so that on one hand, the requirement of the contact measurement principle is required, and on the other hand, the technical requirement of the operator can be further reduced, the grooved wheel 16 is prevented from falling off from the measured elbow 11 due to careless operation, the operator only needs to make the v-shaped ring groove in contact with and in clamping and abutting connection with the outer edge of the measured elbow 11, and then the handheld measuring instrument 7 is moved to make the grooved wheel 16 roll and sweep once relative to.
Referring to fig. 1, fig. 3, fig. 5 and fig. 6, as a specific embodiment of the pipeline space dimension measuring system provided by the present invention, a measuring instrument body is provided with an accommodating space, an identification component includes a light emitter 20 disposed in the accommodating space, a power supply and a mask plate 22 provided with a light outlet, the mask plate 22 is mounted on the measuring instrument body, and the power supply is electrically connected to the light emitter.
The mask plate 22 is an optical mask plate made by a photo-lithography machine, and has an optical light-emitting hole, and the emergent light of the luminous body 20 can penetrate through the light-emitting hole of the mask plate 22 to form a target with a certain shape, so that the size capturing and analyzing device can obtain the space size of the bent pipe 11 to be measured by capturing and identifying the track of the target and further analyzing.
In one embodiment of the present invention, the light emitter 20 is an LED light source board.
Referring to fig. 5, as an embodiment of the system for measuring a spatial dimension of a pipeline provided by the present invention, a light-diffusing plate 21 is disposed between a light-emitting body 20 and a mask plate 22 so that the emergent light emitted from the light-emitting body 20 can be uniformly diffused onto the mask plate 22.
Referring to fig. 5 and 6, as an embodiment of the pipeline space dimension measuring system provided by the present invention, the measuring instrument body is a gun-type (L-type) or electric drill-type casing shape structure, and a sheave connecting frame is provided at one end of the measuring instrument body to mount the sheave 16.
Referring to fig. 5 to 8, the sheave connecting frame includes a sheave connecting frame inclined plate 12 and a sheave connecting frame vertical plate 34, the sheave connecting frame inclined plate 12 is connected with the sheave connecting frame vertical plate 34, and the sheave connecting frame vertical plate 34 is used for being installed on the measuring instrument body. The sheave 16 is rotatably connected to the sheave connecting frame sloping plate 12 through a rolling bearing 15.
Referring to fig. 5 to 8, the sheave connecting frames have various types, that is, the sheave connecting frame inclined plates 12 of the sheave connecting frames of different types and the sheave connecting frame vertical plates 34 have different setting angles (the setting angles are all from acute angles to obtuse angles), so that an operator can select a sheave connecting frame of a proper type according to the shapes of different measured bent pipes to sweep the measured bent pipe conveniently, so that the size capture analysis device can capture a target. Similarly, the grooved pulley 16 has various models, that is, the size of the grooved pulley 16 and the size of the v-shaped ring groove are different, so as to facilitate the scanning of the measured bent pipe with different outer diameters.
Referring to fig. 5-6, the sheave attachment brackets and sheaves 16 of different types are typically assembled in advance. The sheave connecting frame vertical plate 34 of the sheave connecting frame is firstly positioned with the measuring instrument body through the cylindrical pin 33 and is fixed on the measuring instrument body through the first screw 17, so that the requirements of quick installation and replacement of sheaves 16 and sheave connecting frames of different models are met.
Referring to fig. 5 and 6, in an embodiment of the system for measuring a spatial dimension of a pipeline provided by the present invention, the power source is a plurality of batteries, the measuring instrument body is provided with a battery jar 18 for placing the batteries, the battery jar 18 is covered with a battery jar cover 23, and the battery jar cover 23 is movably connected with the measuring instrument body through a second screw 24.
Referring to fig. 1 to 3, as a specific embodiment of the system for measuring a spatial dimension of a pipeline provided by the present invention, a pipeline clamping mechanism includes a frame 1 and a plurality of fixing assemblies for movably fixing a measured elbow, where the frame 1 is a rod-type frame structure. The fixing component is movably arranged on the machine frame 1, namely the fixing component can change the installation position on the machine frame 1 so as to adapt to fixing the tested bent pipes 11 with different sizes and shapes.
Referring to fig. 1 to 3, as an embodiment of the pipe space dimension measuring system provided by the present invention, the fixing assembly includes a first sliding block 5 capable of being adjusted transversely on the frame 1, a second sliding block 10 capable of being adjusted longitudinally relative to the first sliding block 5, and a fixing member disposed on the second sliding block 10 and used for fixing the pipe to be measured. Therefore, the transverse position of the fixing piece can be adjusted relative to the rack 1 by adjusting the first sliding block 5, and the longitudinal position of the fixing piece can be adjusted relative to the rack 1 by adjusting the second sliding block 10, so that the fixing piece has the function of multi-degree-of-freedom adjustment to meet the requirements of fixing bent pipes 11 to be measured with different sizes and shapes.
Referring to fig. 1 to 3, as an embodiment of the pipeline space dimension measuring system provided by the present invention, a transverse sliding groove is provided on the frame 1, and a sliding portion slidably engaged with the transverse sliding groove is provided at a lower portion of the first sliding block 5, so that the first sliding block 5 can slide transversely relative to the frame 1 by the sliding engagement of the sliding portion and the transverse sliding groove.
Referring to fig. 1 to 3, as an embodiment of the pipeline space dimension measuring system provided by the present invention, a first sliding block 5 is provided with a longitudinal guide post 6, and a second sliding block 10 is provided with a sliding hole in sliding fit with the guide post 6, so that the second sliding block 10 can slide longitudinally relative to the first sliding block 5 by the sliding fit of the guide post 6 and the sliding hole.
Optionally, the first sliding block 5 is provided with a first bolt 4 in threaded connection with the first sliding block 5, so that when the first sliding block 5 is adjusted to a preset position and needs to be fixed, the first bolt 4 is screwed, and the first sliding block 5 can be fixed by tightly abutting the first bolt 4 against the frame 1. Optionally, the second slider 10 is provided with a third bolt in threaded connection with the second slider, so that when the second slider 10 is adjusted to a preset position and needs to be fixed, the third bolt is screwed, and the second slider 10 can be fixed by tightly abutting the third bolt against the guide post 6.
Referring to fig. 1 and fig. 3, as an embodiment of the pipeline space dimension measuring system provided by the present invention, the fixing member may be a clamping block 9 having a v-shaped slot, and the clamping block 9 is in threaded connection with a second slider 10 through a second bolt 8. The tested bent pipe 11 is movably clamped and fixed between the clamping block 9 and the second slide block 10 by the v-shaped clamping groove of the clamping block 9.
Optionally, the fixing component has at least 2 groups, and the fixing component is generally used for fixing the straight pipe portion of the elbow 11 to be measured and clamping the straight pipe portion on the straight pipe portion, so that even if the fixing component interferes with the sheave 16, the size of the whole straight pipe portion can be obtained by connecting the information scanned to the straight pipe portion of the pipe before and after the fixing component, and the measurement result is not affected.
Referring to fig. 11, as a specific embodiment of the pipeline space dimension measuring system provided by the present invention, the fixing member may be a semicircular elastic hoop 25 for elastically clamping the curved pipe 11 to be measured, the elastic hoop 25 is fixedly connected to the second slider 10, the elastic hoop 25 has certain elasticity, and the curved pipe 11 to be measured is fixed in the elastic hoop 25 by utilizing the elastic expansion and contraction performance of the elastic hoop 25, and the section of the elastic hoop 25 is semicircular, and has a gap that does not interfere with the sweeping of the grooved wheel 16 to the curved pipe 11 to be measured.
Referring to fig. 1, fig. 3, fig. 4, fig. 9 and fig. 10, as a specific embodiment of the pipeline space dimension measuring system provided by the present invention, the pipeline space dimension measuring system provided by the embodiment of the present invention further includes an elbow end positioning device for being disposed at an end of the measured elbow 11, the elbow end positioning device includes a connecting mechanism for being movably connected with the end of the measured elbow 11 and a stopper for being abutted against the end of the measured elbow 11, and the stopper is connected with the connecting mechanism.
Before the measured bent pipe 11 is swept, the bent pipe end part positioning devices are respectively installed at the end part of the measured bent pipe 11, the connecting mechanism is firstly installed at the end part of the measured bent pipe 11 during installation, and the blocking body connected with the connecting mechanism is abutted to the end part of the measured bent pipe 11. When the measured bent pipe 11 is swept, the sheave 16 can be abutted and stopped with the blocking body, so that the restraint on the sheave 16 when the end part is swept is increased, the sheave 16 can be accurately stopped at the end part edge of the measured bent pipe 11, and the end part measurement and position determination of the measured bent pipe 11 are more accurate.
Referring to fig. 1, fig. 3, fig. 4, fig. 9 and fig. 10, as an embodiment of the pipeline space dimension measuring system provided by the present invention, the connecting mechanism includes a first block 26, a second block 27 and a screw 31, which are respectively used for abutting against the inner wall of the measured elbow 11, the first block 26 is provided with a first threaded hole, the second block 27 is provided with a second threaded hole, and the thread directions of the first threaded hole and the second threaded hole are opposite. The screw 31 is provided with a first external thread and a second external thread which are respectively in threaded connection with the first threaded hole and the second threaded hole.
Thus, the first latch 26 and the second latch 27 can be translated closer to or farther from by the operator manually rotating the screw 31. When the elbow end positioning device needs to be installed, an operator firstly plugs the first fixture block 26 and the second fixture block 27 into the elbow pipe 11 to be measured, then rotates the screw 31 to enable the first fixture block 26 and the second fixture block 27 to be far away until the first fixture block 26 and the second fixture block 27 are tightly abutted to the inner wall of the elbow pipe 11 to be measured, and therefore the elbow end positioning device is fixed. After the positioning device for the end part of the bent pipe is installed and fixed, the blocking body is arranged outside the bent pipe 11 to be measured, the blocking body is abutted against the end part of the bent pipe 11 to be measured, and the outer edge of the blocking body extending out of the bent pipe 11 to be measured can be abutted against the grooved pulley 16. When the elbow end positioning device is disassembled, an operator rotates the screw 31 to enable the first fixture block 26 and the second fixture block 27 to move horizontally and approach, so that the first fixture block 26 and the second fixture block 27 are not pressed against the inner wall of the elbow 11 to be tested any more, and the elbow end positioning device can be taken down.
Referring to fig. 1, 3, 4, 9 and 10, as an embodiment of the pipeline space dimension measuring system provided by the present invention, the connecting mechanism further includes a hinge 29, and the hinge 29 is located outside the measured elbow 11 when the elbow end positioning device is installed and used.
The hinge 29 comprises a first connecting plate and a second connecting plate, one end of the first connecting plate is hinged with one end of the second connecting plate, and the other end of the first connecting plate is hinged with one end of the first clamping block 26; the other end of the second connecting plate is also hinged with one end of a second clamping block 27. In this way, the hinge 29 enables the first fixture 26 and the second fixture 27 to keep a certain constraint on the end of the first fixture 26 and the second fixture (in the non-moving direction) while ensuring the first fixture 26 and the second fixture 27 to move horizontally, so as to prevent the first fixture 26 and the second fixture 27 from rotating and skewing in the horizontal moving process.
Referring to fig. 1, fig. 3, fig. 4, fig. 9 and fig. 10, as an embodiment of the pipeline space dimension measuring system provided by the present invention, the first latch 26 and the second latch 27 are both half cylinders adapted to the inner diameter of the measured bent pipe 11, that is, the radius of the half cylinder is equal to or slightly smaller than the inner diameter of the measured bent pipe 11, so that the first latch 26 and the second latch 27 can be stably matched with the inner wall of the measured bent pipe 11, and the first latch 26 and the second latch 27 can be firmly abutted.
Referring to fig. 1, 3, 4, 9 and 10, as an embodiment of the system for measuring a spatial dimension of a pipeline provided by the present invention, the blocking body includes two blocking plates 30 respectively disposed on the first latch 26 and the second latch 27. When the elbow end positioning device is installed, the baffle 30 is perpendicular to the end axis of the elbow 11 to be measured.
Referring to fig. 4, 9 and 10, the first latch 26 and the second latch 27 are respectively provided with a mounting groove for mounting the baffle 30, and the baffle 30 is abutted and fixed in the mounting groove by a third screw 32.
Referring to fig. 1, as an embodiment of the pipeline spatial dimension measuring system provided by the present invention, the dimension capturing and analyzing device includes a CCD camera 3 for capturing and identifying the track of the identification component, and an analyzing module, which can communicate with the CCD camera 3, so as to analyze the spatial dimension of the measured elbow 11 according to the track signal captured and identified by the CCD camera 3.
Optionally, the analysis module may be a controller or a control unit such as an industrial personal computer, a PLC, or a single chip microcomputer.
Referring to fig. 1, as an embodiment of the pipeline space dimension measuring system provided by the present invention, a CCD camera 3 is mounted and fixed on a frame 1 through a camera connecting frame 2.
Referring to fig. 5 and fig. 6, as an embodiment of the pipeline space dimension measuring system provided by the present invention, the measuring instrument body is provided with a communication module for communicating with the dimension capturing and analyzing device. The measuring instrument body is provided with a self-reset switch 19, the self-reset switch 19 can be communicated with the size capture analysis device through a communication module, and before or after the test, an operator can inform the size capture analysis device to start or end capturing a target signal by pressing the self-reset switch 19.
It should also be understood that before the spatial dimension measurement of the measured bent pipe 11 is performed by using the pipeline spatial dimension measurement system provided by the embodiment of the present invention, the pipe diameter of the measured bent pipe 11, the dimensions (dimensional information such as thickness, radius and v-groove included angle) of the sheave 16 adapted to the pipe diameter and used for measurement are known, and the coordinate position of the rotation center of the sheave 16 in the identification component coordinate system needs to be determined (calibrated) in advance. Since the models of the sheave attachment bracket and the sheave 16 adapted when the elbow pipe 11 to be measured with different sizes is measured are not necessarily the same, the sheave attachment bracket and the sheave 16 with the corresponding models need to be installed according to requirements before measurement, and therefore, the coordinate position of the rotation center of the sheave 16 in the coordinate system of the marking assembly needs to be re-determined every time. The following provides a method of determining the coordinate position of the center of rotation of sheave 16 in the identification assembly (target of mask 22) coordinate system:
first, a measurement target plate 35 is produced, and the measurement target plate 35 is attached to one side (outer side) of the sheave 16.
Alternatively, referring to FIG. 12, the target pattern of the assay target plate 35 can be printed using a laser printer or made using a photolithography machine.
Alternatively, referring to fig. 12, the assay target plate 35 may be secured to the sheave 16 by magnets 36, with the plane of the assay target plate 35 in close contact with the side of the sheave 16, which is considered to be coplanar with the plane of the assay target plate 35.
And secondly, keeping the handheld measuring instrument 7 still, rotating the grooved wheel 16 to enable the measuring target plate 35 to be located at least three different positions respectively, recognizing and recording image (track) information of the measuring target plate 35 at each position, recognizing and recording image information of the identification assembly (target of the mask plate 22) at the moment, and performing feature extraction on the image information, namely extracting circle center coordinate information of the mask plate 22.
Specifically, referring to fig. 13, images of the measurement target plate 35 and the mask plate 22 can be simultaneously recorded by recognition, the measurement target plate 35 in contact with the sheave 16 is rotated to three or more different positions, and images of the positions (tracks) of the rotated measurement target plate 35 are respectively captured and recorded by a professional measurement camera. For the target picture of each position measurement target plate 35, since the relative position coordinates between the target points of each measurement target plate 35 and the internal parameters of the measurement camera are known, the camera coordinates (i.e., measurement camera coordinates) of each target point of the measurement target plate 35 at each position can be obtained, coordinates of each target point of the measurement target plate 35 at three (or more than three, the number of which is related to the image of the measurement target plate 35 recorded by the measurement camera) different positions are fitted, a fitting circle is obtained, and further the coordinates of the rotation center (fitting circle center) are obtained. And averaging the central coordinates obtained by fitting each target point to obtain the final (calibration) coordinate value of the rotating central point. The normal to the fitted circle is the direction of the axis of rotation of sheave 16.
Meanwhile, the position of the handheld measuring instrument 7 relative to the measuring camera is kept unchanged, a picture of the target of the identification component (the mask plate 22) on the handheld measuring instrument 7 is shot and recorded, and the coordinate value of the target of the identification component (the mask plate 22) in the coordinate system of the measuring camera is calculated.
Alternatively, a measuring camera for measuring the image (track) information of the target plate 35 and the image information of the identification component (the target of the mask plate 22) may also be the size capturing and analyzing device in the pipeline space size measuring system provided by the embodiment of the present invention.
And thirdly, in the same coordinate system, fitting to obtain coordinate information of the rotation center of the grooved pulley 16, obtaining coordinate information of the identification component, and further calculating to obtain coordinate position information of the rotation center of the grooved pulley 16 in the identification component (handheld measuring instrument) coordinate system.
Specifically, referring to fig. 14, since the hand-held measuring instrument 7 is in the measuring camera coordinate system, the direction of the rotation axis of the sheave 16 and the coordinates of the intersection point of the rotation axis and the surface on one side of the sheave 16 are known. Therefore, the direction of the rotation axis of the sheave 16 and the coordinate value of the intersection point of the rotation axis and the surface of one side of the sheave 16 in the target coordinate system of the mask plate 22 on the handheld measuring instrument 7 can be calculated, and the coordinate value of the center of the sheave 16 relative to the target coordinate system of the mask plate 22 on the handheld measuring instrument 7 can be obtained by translating the coordinate of the intersection point by one half of the thickness of the sheave 16 along the direction of the rotation axis of the sheave 16.
When the handheld measuring instrument 7 is used for measuring the bent pipe 11 to be measured, the v-shaped ring groove is always kept to be in contact with the pipeline, and each contact position can obtain the coordinate value of the center of the sheave 16 in the coordinate system of the size capture analysis device, the direction of the rotation axis of the sheave 16 and the tangential magnitude of the center point of the sheave 16 at the moment by fitting the center point of the sheave 16 by adopting a cubic B spline. Referring to fig. 14, the center of the pipe bend 11 under test is calculated in a normal plane passing through the fitting point of the center of the sheave 16. The distance between the center of the elbow 11 to be measured and the center of the sheave 16 is as follows:
D＝R+r/sin(α/2)
wherein, R is the distance from the bottom of the roller v-shaped ring groove to the rotation center, R is the outer diameter of the measured bent pipe, and alpha is the included angle of the v-shaped ring groove.
In particular, referring to fig. 10, when measuring the end of a bend, the position of sheave 16 may change abruptly due to lack of restraint, resulting in inaccurate end measurements. In order to ensure that the handheld measuring instrument 7 is more reliable in the measurement of the end part of the pipeline, the end part of the pipeline is provided with a bent pipe end part positioning device, and the accurate coordinate value of the end part of the pipeline can be obtained by compensating the radius of a grooved pulley 16 of the handheld measuring instrument 7 along the tangential direction of the measurement track.
After the coordinate position of the rotation center of the grooved wheel 16 in the identification component coordinate system is calibrated, the handheld measuring instrument 7 is used for sweeping the measured bent pipe 11, the size capturing and analyzing device is used for capturing and analyzing the track of the handheld measuring instrument, and the space size drawing of the measured bent pipe 11 is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. Pipeline space dimension measurement system, its characterized in that includes:
the handheld measuring instrument comprises a measuring instrument body, a grooved wheel and an identification component, wherein the grooved wheel is used for being in rolling fit with a measured bent pipe, the grooved wheel is rotationally connected with the measuring instrument body, and the identification component is arranged on the measuring instrument body;
the size capturing and analyzing device is used for capturing and identifying the track of the identification component and analyzing the track to obtain the space size of the bent pipe to be measured; and
the pipeline clamping mechanism is used for installing and fixing the bent pipe to be measured;
the measuring instrument body is equipped with the accommodation space, the sign subassembly is including setting up luminous element, power and the mask plate that is equipped with the light-emitting hole in the accommodation space, the mask plate is installed on the measuring instrument body, the power with the luminous element electricity is connected, the emergent ray of luminous element can pierce through the light-emitting hole of mask plate forms the target, size seizure analytical equipment is through catching discernment the orbit and then the analysis of target reachs the space size of being surveyed the bent pipe.
2. The pipe space dimension measuring system of claim 1, wherein the sheave comprises a wheel body provided with a v-shaped ring groove arranged tangentially to and circumferentially around the pipe bend to be measured.
3. The system for measuring the spatial dimension of the pipeline according to claim 1, wherein the pipeline clamping mechanism comprises a frame and a plurality of fixing components for movably fixing the bent pipe to be measured, and the fixing components are movably arranged on the frame.
4. The system of claim 3, wherein the fixing assembly comprises a first slide block capable of being adjusted transversely relative to the frame, a second slide block capable of being adjusted longitudinally relative to the first slide block, and a fixing member disposed on the second slide block for fixing the pipe bend to be measured.
5. The system for measuring the spatial dimension of the pipeline according to claim 4, wherein the fixing member is a clamping block provided with a v-shaped clamping groove, and the clamping block is connected with the second sliding block through a second bolt.
6. The system according to claim 4, wherein the fixing member is a semicircular elastic hoop for elastically clamping the pipe to be measured, and the elastic hoop is fixedly connected to the second sliding block.
7. The system according to claim 1, further comprising an elbow end positioning device for positioning at the end of the elbow to be measured, wherein the elbow end positioning device comprises a connecting mechanism for movably connecting with the end of the elbow to be measured and a stopper for abutting against the end of the elbow to be measured and for abutting-fitting with the sheave to determine the end position of the elbow to be measured, and the stopper is connected with the connecting mechanism.
8. The system according to claim 7, wherein the connecting mechanism includes a first fixture block, a second fixture block and a screw rod, which are respectively used for abutting against the inner wall of the elbow to be measured, the first fixture block is provided with a first threaded hole, the second fixture block is provided with a second threaded hole, the first threaded hole and the second threaded hole have opposite thread directions, the screw rod is provided with a first external thread and a second external thread, which are respectively in threaded connection with the first threaded hole and the second threaded hole, and the connecting mechanism drives the first fixture block and the second fixture block to abut against the inner wall of the elbow to be measured by rotation of the screw rod.
9. The system according to any one of claims 1-8, wherein the dimension capturing and analyzing device comprises a CCD camera for capturing and identifying the track of the identification component and an analyzing module for analyzing the measured spatial dimension of the elbow according to the track signal captured and identified by the CCD camera, and the analyzing module can communicate with the CCD camera.
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| CN111121620B (en) * | 2019-12-12 | 2021-02-02 | 天目爱视（北京）科技有限公司 | Rotary 3D information rapid acquisition equipment |
| CN111609793A (en) * | 2020-04-14 | 2020-09-01 | 中国科学院西安光学精密机械研究所 | Zoom cam curve precision detection system and method based on image measurement |
| CN112945146A (en) * | 2021-01-30 | 2021-06-11 | 河南新开源石化管道有限公司 | Detection device for detecting elbow curvature |
| CN113063347A (en) * | 2021-03-04 | 2021-07-02 | 华东交通大学 | Three-dimensional coordinate measuring device for complex bent pipe |
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