CN116295091A - Novel measuring method and device for out-of-roundness of gas cylinder - Google Patents

Novel measuring method and device for out-of-roundness of gas cylinder Download PDF

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Publication number
CN116295091A
CN116295091A CN202211681811.3A CN202211681811A CN116295091A CN 116295091 A CN116295091 A CN 116295091A CN 202211681811 A CN202211681811 A CN 202211681811A CN 116295091 A CN116295091 A CN 116295091A
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gas cylinder
roundness
camera
measured
depth camera
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张冰
韩影
宋雪
张传磊
吴承霖
李智
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Qilu University of Technology
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Qilu University of Technology
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Priority to CN202211681811.3A priority Critical patent/CN116295091A/en
Publication of CN116295091A publication Critical patent/CN116295091A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/2408—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring roundness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention provides a novel measuring device for out-of-roundness of a gas cylinder, which comprises a depth camera, a camera supporting rod and a rotating base, wherein the depth camera is arranged at the top end of the camera supporting rod, the bottom end of the camera supporting rod and the rotating base are arranged on a workbench surface, the camera supporting rod is used for adjusting the height and the angle of the depth camera, the rotating base is used for placing a gas cylinder to be measured and driving the gas cylinder to be measured to rotate along the axis of the gas cylinder, and the depth camera is used for shooting the gas cylinder to be measured. The invention correspondingly provides a measuring method, wherein the depth camera is used for shooting the coordinate data of the gas cylinder, and a computer calculates out-of-roundness of the gas cylinder according to the data. The invention can realize the rapid detection of the out-of-roundness of the gas cylinders with different diameters, greatly improves the working efficiency of the inspection, simultaneously avoids the error of manual measurement of the out-of-roundness, and ensures the accuracy of the inspection.

Description

Novel measuring method and device for out-of-roundness of gas cylinder
Technical Field
The invention relates to the technical field of industrial gas cylinder inspection and detection, in particular to a novel measuring method and device for out-of-roundness of a gas cylinder.
Background
The gas cylinder can all lead to the hole pattern out of round deformation of different degrees to appear in the gas cylinder body horizontal direction in production process to lead to the gas cylinder to become unqualified product. The traditional manual detection efficiency and accuracy are low, so that the out-of-roundness of the gas cylinder can be conveniently detected, the manual measurement workload is reduced, the detection efficiency and quality are improved, and a novel detection method and device for the out-of-roundness detection of the gas cylinder are necessary to design.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a novel measuring device for the out-of-roundness of a gas cylinder, which comprises a depth camera, a camera supporting rod and a rotating base, wherein the depth camera is arranged at the top end of the camera supporting rod, the bottom end of the camera supporting rod is arranged on a workbench surface, the camera supporting rod is used for adjusting the height and the angle of the depth camera, the rotating base is used for placing a gas cylinder to be measured, the rotating base is arranged on the workbench surface, the rotating base drives the gas cylinder to be measured to rotate along the axis of the gas cylinder, and the depth camera is used for shooting the gas cylinder to be measured.
Preferably, the camera bracing piece includes camera angle adjustment axle, telescopic link, bottom sprag pole and bracing piece base, and bottom sprag pole bottom is connected with the bracing piece base, and the bottom sprag pole is hollow structure, and the telescopic link slides and sets up in bottom sprag pole hollow structure, and telescopic link constitutes telescopic machanism with the bottom sprag pole, and the camera angle adjustment axle is connected to the one end that the bottom sprag pole was kept away from to the telescopic link, and the degree of depth camera is connected on the camera angle adjustment axle, and camera angle adjustment axle drives the longitudinal rotation of degree of depth camera, the bracing piece base is arranged in on the table surface.
Preferably, the rotating base comprises a matching base, a rotary table and a circular base plate, the rotary table is arranged on the circular base plate in a rotating mode, the circular base plate is connected with the working table surface, the matching base is fixedly connected with the rotary table, the shape of the matching base is matched with the shape and the size of the bottom of the gas cylinder to be measured, the gas cylinder to be measured is placed on the matching base, and the matching base is provided with various types according to the gas cylinders to be measured with different diameters.
A novel measuring method for the out-of-roundness of a gas cylinder comprises the following steps:
s1: the camera support rod and the rotating base are arranged on a workbench surface, the depth camera is installed on the camera support rod, the gas cylinder to be measured is placed on the rotating base, and the whole gas cylinder to be measured is located in the shooting visual field range of the depth camera;
s2: starting a depth camera to shoot the gas cylinder to be detected to obtain coordinate data of each point on the gas cylinder to be detected, wherein the depth camera is connected with a computer for processing the data, and the depth camera uploads the shot coordinate data of the gas cylinder to be detected to the computer;
s3: the computer processes the coordinate data, screens the coordinate data of the required points, and calculates out-of-roundness of the measured gas cylinder according to an out-of-roundness calculation formula;
s4: and (3) rotating the measured gas cylinder to change a certain angle, shooting by a depth camera to obtain coordinate data of each point on the measured gas cylinder under different rotation angles, obtaining out-of-roundness of the measured gas cylinder under different rotation angles according to the step (S3), and judging whether the out-of-roundness of the measured gas cylinder is qualified or not according to a calculation result.
Preferably, the process of processing the coordinate data by the computer is as follows: setting required measuring points, respectively setting a cross section at the upper part, the middle part and the lower part of the gas cylinder to be measured, wherein the three cross sections are respectively an A surface, a B surface and a C surface, and the points A are respectively taken on the circumferences of the A surface, the B surface and the C surface 1 、B 1 And C 1 Point A 1 、B 1 And C 1 On the same longitudinal line, respectively taking point A on the circumferences of A face, B face and C face 2 、B 2 And C 2 Point A 2 、B 2 And C 2 On the same longitudinal line A 1 、A 2 The two points of connection line pass through the center of the A plane and B 1 、B 2 The connecting line of the two points passes through the center of the circle of the B surface, C 1 、C 2 The connecting line of the two points passes through the center of the C surface;
establishing a space rectangular coordinate system, taking the center of a main optical axis of a depth camera lens as an origin of the space coordinate system, taking a horizontal straight line where the optical axis is positioned as a Z axis, and taking the Z axis as a horizontal straight line passing through the origin from a measured gas cylinder to the lens, so as toParallel to point A 1 、B 1 And C 1 The vertical line is taken as a Y axis, the straight line passing through the origin is taken as an X axis, the straight line which is perpendicular to the Y axis and the Z axis at the same time and passes through the origin is taken as an X axis, a space rectangular coordinate system is formed, a coordinate scale is set according to the actual size, the size of the diameter of the surface A is obtained according to the coordinates, and the diameter of the surface A is A 1 、A 2 Connecting two points, and equally, respectively obtaining the diameter size of the B surface and the diameter size of the C surface;
according to the above, the dimensions of other diameters of the surface A are respectively obtained, the nominal diameter D, the maximum diameter Dmax and the minimum diameter Dmin on the surface A are obtained, the out-of-roundness of the surface A is obtained according to an out-of-roundness calculation formula, the out-of-roundness of the surface B and the surface C are respectively obtained, whether the out-of-roundness of the gas cylinder to be measured is qualified or not is judged according to the out-of-roundness of the three surfaces, and when the out-of-roundness values of the three surfaces all meet the standard, the out-of-roundness of the gas cylinder to be measured is qualified;
the calculation formula of the out-of-roundness is O= [ (Dmax-Dmin)/D ]. 100%; wherein O is a non-roundness factor; dmax is the maximum diameter of the cylinder cross section; dmin is the minimum diameter of the cross section of the cylinder; d is the nominal diameter.
Preferably, the A surface is positioned at 2cm-10cm below the arc transition of the shoulder of the gas cylinder to the straight line part of the side surface, the C surface is positioned at 2cm-10cm above the bottom of the gas cylinder, and the B surface is positioned at the midpoint position between the A surface and the C surface.
Preferably, in the step S4, for practical needs, the measured gas cylinders are rotated 180 degrees in total, and the more the same measured gas cylinder is rotated, the more accurate the value of the out-of-roundness is measured finally.
The invention has the beneficial effects that:
1. the measuring method and the measuring device for the out-of-roundness of the gas cylinder can realize the rapid detection of the out-of-roundness of the gas cylinders with different diameters, and greatly improve the working efficiency of inspection.
2. The inspection process of the invention is completely participated by the detection equipment, thereby avoiding errors of manual measurement of out-of-roundness and ensuring the accuracy of inspection.
3. The measuring device for the out-of-roundness of the gas cylinder is simple in structure and easy to operate. The corresponding matching base can be replaced according to the gas cylinders with different diameters, so that the out-of-roundness of the gas cylinders with different diameters can be detected. The depth camera is connected with the telescopic link, camera angle adjusting shaft with the bottom support pole, can realize the upper and lower height and the shooting angle adjustment of depth camera, can highly different gas bottle measurement use.
Drawings
FIG. 1 is an overall layout of a measuring device of the present invention;
FIG. 2 is a schematic diagram of a process of shooting a gas cylinder by the depth camera;
FIG. 3 is a schematic view of a camera support bar according to the present invention;
FIG. 4 is a schematic view of a rotating base structure according to the present invention;
FIG. 5 is a schematic drawing showing the extraction of the desired measurement points on the cylinder being measured;
fig. 6 is an enlarged view of the required measurement points on the cylinder being measured.
Reference numerals in the drawings: 1. the depth camera comprises a depth camera body, 2, a camera supporting rod, 21, a camera angle adjusting shaft, 22, a telescopic rod, 23, a bottom supporting rod, 24 and a supporting rod base, 3, a rotating base, 31, a matching base, 32, a turntable, 33, a round chassis, 4, a measured gas cylinder, 5, a working table, 6, a space rectangular coordinate system, 7, a depth camera shooting visual field range, 8 and a required measuring point.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
1-6, a novel measuring device of gas cylinder out of roundness, including degree of depth camera 1, camera bracing piece 2 and rotation base 3, degree of depth camera 1 sets up on camera bracing piece 2 top, and table surface 5 is arranged in to camera bracing piece 2 bottom, and camera bracing piece 2 is used for adjusting the height and the angle of degree of depth camera 1, rotation base 3 is used for placing by gas cylinder 4, and rotation base 3 sets up on table surface 5, and rotation base 3 drives by gas cylinder 4 and rotates along the gas cylinder axis, degree of depth camera 1 is used for taking by gas cylinder 4.
Specifically, the camera bracing piece 2 includes camera angle adjustment shaft 21, telescopic link 22, bottom sprag pole 23 and bracing piece base 24, bottom sprag pole 23 bottom is connected with bracing piece base 24, bottom sprag pole 23 is hollow structure, telescopic link 22 slides and sets up in the hollow structure of bottom sprag pole 23, telescopic link 22 constitutes telescopic machanism with bottom sprag pole 23, camera angle adjustment shaft 21 is connected to telescopic link 22's one end of keeping away from bottom sprag pole 23, the depth camera 1 is connected on camera angle adjustment shaft 21, camera angle adjustment shaft 21 drives the longitudinal rotation of depth camera 1 for the height and the angularly adjustable of depth camera 1 can shoot the gas cylinder of different heights and detect, bracing piece base 24 is arranged in on table surface 5.
Specifically, the rotating base 3 comprises a matching base 31, a turntable 32 and a circular base 33, the turntable 32 is rotatably arranged on the circular base 33, the circular base 33 is connected with the workbench surface 5, the matching base 31 is fixedly connected with the turntable 32, the shape of the matching base 31 is matched with the shape and the size of the bottom of the gas cylinder 4 to be measured, the gas cylinder 4 to be measured is placed on the matching base 31, the gas cylinder 4 to be measured can rotate along with the turntable 32 through the matching base 31, the matching base 31 is provided with various types according to the gas cylinders 4 to be measured with different diameters, the rotating base 3 is a circular base, and the base axle center and the gas cylinder axle center can be ensured to be on the same longitudinal line.
It should be understood that the depth camera 1 can obtain depth information of a photographing object, that is, three-dimensional position and size information.
A novel measuring method for the out-of-roundness of a gas cylinder comprises the following steps:
s1: the camera support rod 2 and the rotating base 3 are arranged on the workbench surface 5, the depth camera 1 is arranged on the camera support rod 2, the measured gas cylinder 4 is placed on the rotating base 3, the whole measured gas cylinder 4 is positioned in a depth camera shooting visual field range 7, the depth camera 1 horizontally shoots the measured gas cylinder 4, and when the depth camera 1 shooting visual field range cannot cover the body of the measured gas cylinder 4, the shooting angle of the depth camera 1 can be adjusted by rotating the camera angle adjusting shaft 21;
s2: starting a depth camera 1 to shoot the gas cylinder 4 to be detected, obtaining coordinate data of each point on the gas cylinder 4 to be detected, connecting a computer for processing the data with the depth camera 1, and uploading the shot coordinate data of the gas cylinder 4 to the computer by the depth camera 1;
s3: the computer processes the coordinate data, screens the coordinate data of the required points, and calculates out-of-roundness of the measured gas cylinder 4 according to an out-of-roundness calculation formula;
s4: the measured gas cylinder 4 is rotated, the measured gas cylinder 4 is changed by a certain angle, the depth camera 1 shoots and obtains coordinate data of each point on the measured gas cylinder 4 under different rotation angles, out-of-roundness of the measured gas cylinder 4 under different rotation angles is obtained according to the step S3, whether the out-of-roundness result of the measured gas cylinder is consistent with that measured under the previous rotation angle is checked, whether the out-of-roundness of the measured gas cylinder 4 is qualified is judged according to the calculation result, and the accuracy of measurement can be ensured by shooting and measuring the gas cylinders under a plurality of rotation angles.
It should be understood that the measured gas cylinder 4 can calculate out-of-roundness under different angles through rotation, wherein the largest value in the out-of-roundness result must meet the out-of-roundness requirement in the gas cylinder production standard, beyond which the alarm program can be set in a computer or an alarm device is connected to alarm in a sounding way, at this time, the gas cylinder is proved to be out-of-roundness requirement, namely an unqualified product, so that a worker can know whether the product is qualified or not conveniently, and the detection result data of each gas cylinder is not required to be observed all the time to judge whether the gas cylinder is qualified or not.
Specifically, the process of processing the coordinate data by the computer is as follows: setting required measuring points 8, respectively setting a cross section at the upper part, the middle part and the lower part of the measured gas cylinder 4, wherein the three cross sections are respectively an A surface, a B surface and a C surface, and the points A are respectively taken on the circumferences of the A surface, the B surface and the C surface 1 、B 1 And C 1 Point A 1 、B 1 And C 1 On the same longitudinal line, respectively taking point A on the circumferences of A face, B face and C face 2 、B 2 And C 2 Point A 2 、B 2 And C 2 On the same longitudinal line A 1 、A 2 Two pointsThe connecting line passes through the center of the A plane and B 1 、B 2 The connecting line of the two points passes through the center of the circle of the B surface, C 1 、C 2 The connection line of the two points passes through the center of the C plane, point A 1 、B 1 、C 1 、A 2 、B 2 And C 2 I.e. all the required measuring points 8;
establishing a space rectangular coordinate system 6, taking the center of the main optical axis of the lens of the depth camera 1 as the origin of the space coordinate system 6, taking the horizontal straight line of the optical axis as the Z axis, and taking the Z axis as the horizontal straight line passing through the origin from the measured gas cylinder 4 to the lens to be parallel to the point A 1 、B 1 And C 1 The vertical line is taken as a Y axis, the straight line passing through the origin is taken as an X axis, the straight line which is perpendicular to the Y axis and the Z axis at the same time and passes through the origin is taken as an X axis, a space rectangular coordinate system 6 is formed, a coordinate scale is set by the actual size, the actual size is obtained through shooting by the depth camera 1, the coordinate scale can be defined according to the obtained actual size when a computer processes data, the size of the diameter of the surface A is obtained according to the coordinates, and the diameter of the surface A is A 1 、A 2 Connecting two points, and equally, respectively obtaining the diameter size of the B surface and the diameter size of the C surface;
according to the above, the dimensions of other diameters of the surface A are obtained respectively, the nominal diameter D, the maximum diameter Dmax and the minimum diameter Dmin on the surface A are obtained, the nominal diameter D is the average value of all diameters at the same section, the out-of-roundness at the surface A is obtained according to an out-of-roundness calculation formula, the out-of-roundness at the surface A is obtained respectively, the out-of-roundness at the surface B and the surface C are obtained respectively, whether the out-of-roundness of the measured gas cylinder 4 is qualified is judged according to the out-of-roundness of the three surfaces, and when the out-of-roundness values of the three surfaces all meet the standard, the out-of-roundness of the measured gas cylinder 4 is qualified;
in particular, in A on A plane 1 、A 2 Two points are taken as an example, point A 1 Is of the coordinates (Xa) 1 ,Ya 1 ,Za 1 ) The coordinates of the point A2 are (Xa 2 ,Ya 2 ,Za 2 ），A 1 And A 2 The connecting line passes through the center of the A plane, at this time Xa 1 =Xa 2 ,Ya 1 =Ya 2 . A1 and A2 have a wire dimension (i.e., A-plane diameter) of Za 1 -Za 2 The diameter dimensions at the B and C faces were obtained in the same manner as above.
The calculation formula of the out-of-roundness is O= [ (Dmax-Dmin)/D ]. 100%; wherein O is a non-roundness factor; dmax is the maximum diameter of the cylinder cross section; dmin is the minimum diameter of the cross section of the cylinder; d is the nominal diameter.
Specifically, the A surface is positioned at the position of the middle point between the A surface and the C surface, wherein the arc transition of the shoulder of the gas cylinder is 2cm-10cm below the straight line part of the side surface, the C surface is positioned at the position of 2cm-10cm above the bottom of the gas cylinder, and the B surface is positioned at the position of the middle point between the A surface and the C surface.
Specifically, in S4, for practical needs, the measured gas cylinder 4 may be rotated 180 degrees in total, the more the number of times the same measured gas cylinder 4 rotates, the more accurate the value of the out-of-roundness measured finally, that is, the measured gas cylinder 4 is rotated by a certain angle along the same direction each time by taking the initial shooting angle as the 0 degree position, the angle of each rotation is smaller than 180 degrees until the measured gas cylinder 4 rotates 180 degrees relative to the initial shooting angle, the more the number of times the measured gas cylinder 4 rotates from the 0 degree position to the 180 degrees position, the more accurate the value of the out-of-roundness measured, and the specific number of times of rotation of the measured gas cylinder 4 has no specific requirement.
More specifically, the measured gas cylinder 4 can be rotated 45 degrees in the same direction each time, and the measured gas cylinder is rotated four times in total, and the total is 180 degrees, so that four groups of diameter data can be obtained. If multiple measurements are needed, the initial position of the gas cylinder can be rotated by an arbitrary angle to serve as a new 0-degree position, then the gas cylinder 4 to be measured is rotated again in the same direction, and four groups of diameter data are measured at intervals of 45 degrees. The more the number of initial position changes of the cylinder 4 to be measured is, the more diameter data is obtained, and the more accurate the value of the out-of-roundness is for the detection.
The above embodiments merely illustrate the basic principles and features of the present invention, but are not limited by the above embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. The utility model provides a novel measuring device of gas cylinder out of roundness which characterized in that: including degree of depth camera (1), camera bracing piece (2) and rotation base (3), degree of depth camera (1) set up on camera bracing piece (2) top, and table surface (5) are arranged in to camera bracing piece (2) bottom, and camera bracing piece (2) are used for adjusting the height and the angle of degree of depth camera (1), rotation base (3) are used for placing by survey gas cylinder (4), and rotation base (3) set up on table surface (5), and rotation base (3) drive by survey gas cylinder (4) along the gas cylinder axis rotation, degree of depth camera (1) are used for shooting by survey gas cylinder (4).
2. The novel measuring device for out-of-roundness of a gas cylinder according to claim 1, wherein: the camera bracing piece (2) includes camera angle adjustment axle (21), telescopic link (22), bottom support pole (23) and bracing piece base (24), bottom support pole (23) bottom is connected with bracing piece base (24), bottom support pole (23) are hollow structure, telescopic link (22) slip sets up in bottom support pole (23) hollow structure, telescopic link (22) constitute telescopic machanism with bottom support pole (23), camera angle adjustment axle (21) are connected to one end that bottom support pole (23) was kept away from to telescopic link (22), depth camera (1) are connected on camera angle adjustment axle (21), camera angle adjustment axle (21) drive depth camera (1) longitudinal rotation, bracing piece base (24) are arranged in on table surface (5).
3. The novel measuring device for out-of-roundness of a gas cylinder according to claim 1, wherein: the rotary base (3) comprises a matching base (31), a rotary table (32) and a circular base plate (33), wherein the rotary table (32) is rotationally arranged on the circular base plate (33), the circular base plate (33) is connected with the workbench surface (5), the matching base (31) is fixedly connected with the rotary table (32), the shape of the matching base (31) is matched with the shape and the size of the bottom of the gas cylinder (4) to be tested, the gas cylinder (4) to be tested is placed on the matching base (31), and the matching base (31) is provided with various models according to the gas cylinders (4) to be tested with different diameters.
4. A novel method for measuring out-of-roundness of a gas cylinder according to claim 1 or 2 or 3, comprising the steps of:
s1: the camera support rod (2) and the rotating base (3) are arranged on a workbench surface (5), the depth camera (1) is arranged on the camera support rod (2), the gas cylinder (4) to be measured is arranged on the rotating base (3), and the whole gas cylinder (4) to be measured is positioned in a shooting visual field range (7) of the depth camera;
s2: starting a depth camera (1) to shoot the gas cylinder (4) to be detected to obtain coordinate data of each point on the gas cylinder (4) to be detected, wherein the depth camera (1) is connected with a computer for processing the data, and the depth camera (1) uploads the shot coordinate data of the gas cylinder (4) to be detected to the computer;
s3: the computer processes the coordinate data, screens the coordinate data of the required points, and calculates out-of-roundness of the measured gas cylinder (4) according to an out-of-roundness calculation formula;
s4: and (3) rotating the gas cylinder (4) to be measured, changing the gas cylinder (4) to a certain angle, shooting by a depth camera (1) to obtain coordinate data of each point on the gas cylinder (4) to be measured under different rotation angles, obtaining out-of-roundness of the gas cylinder (4) to be measured under different rotation angles according to the step (S3), and judging whether the out-of-roundness of the gas cylinder (4) to be measured is qualified or not according to a calculation result.
5. The novel measuring method for out-of-roundness of a gas cylinder according to claim 4, wherein: the process of processing the coordinate data by the computer is as follows: setting required measuring points (8), respectively setting a cross section at the upper part, the middle part and the lower part of the gas cylinder (4) to be measured, wherein the three cross sections are respectively an A surface, a B surface and a C surface, and the points A are respectively taken on the circumferences of the A surface, the B surface and the C surface 1 、B 1 And C 1 Point A 1 、B 1 And C 1 On the same longitudinal line, respectively on the circumferences of the A face, the B face and the C facePoint A 2 、B 2 And C 2 Point A 2 、B 2 And C 2 On the same longitudinal line A 1 、A 2 The two points of connection line pass through the center of the A plane and B 1 、B 2 The connecting line of the two points passes through the center of the circle of the B surface, C 1 、C 2 The connecting line of the two points passes through the center of the C surface;
establishing a space rectangular coordinate system (6), taking the center of a main optical axis of a lens of the depth camera (1) as an origin of the space rectangular coordinate system (6), taking a horizontal straight line where the optical axis is positioned as a Z axis, and taking the Z axis as a horizontal straight line passing through the origin from a measured gas cylinder (4) to the lens to be parallel to a point A 1 、B 1 And C 1 The vertical line is taken as a Y axis, the straight line passing through the origin is taken as an X axis, the straight line which is perpendicular to the Y axis and the Z axis at the same time and passes through the origin is taken as an X axis, a space rectangular coordinate system (6) is formed, the coordinate scale is set according to the actual size, the size of the diameter of the surface A is obtained according to the coordinates, and the diameter of the surface A is A 1 、A 2 Connecting two points, and equally, respectively obtaining the diameter size of the B surface and the diameter size of the C surface;
according to the above, the dimensions of other diameters of the surface A are respectively obtained, the nominal diameter D, the maximum diameter Dmax and the minimum diameter Dmin on the surface A are obtained, the out-of-roundness of the surface A is obtained according to an out-of-roundness calculation formula, the out-of-roundness of the surface B and the surface C are respectively obtained, whether the out-of-roundness of the gas cylinder (4) to be measured is qualified or not is judged according to the out-of-roundness of the three surfaces, and when the out-of-roundness values of the three surfaces all meet the standard, the out-of-roundness of the gas cylinder (4) to be measured is qualified;
the calculation formula of the out-of-roundness is O= [ (Dmax-Dmin)/D ]. 100%; wherein O is a non-roundness factor; dmax is the maximum diameter of the cylinder cross section; dmin is the minimum diameter of the cross section of the cylinder; d is the nominal diameter.
6. The novel measuring method for out-of-roundness of a gas cylinder according to claim 4, wherein: the A surface is positioned at the position of the middle point between the A surface and the C surface, the arc transition of the shoulder of the gas cylinder is 2cm-10cm below the straight line part of the side surface, the C surface is positioned at the position of 2cm-10cm above the bottom of the gas cylinder, and the B surface is positioned at the position of the middle point between the A surface and the C surface.
7. The novel measuring method for out-of-roundness of a gas cylinder according to claim 4, wherein: in the step S4, for practical needs, the measured gas cylinders (4) are rotated 180 degrees in total, and the more the same measured gas cylinder (4) rotates, the more accurate the value of out-of-roundness is finally measured.
CN202211681811.3A 2022-12-27 2022-12-27 Novel measuring method and device for out-of-roundness of gas cylinder Withdrawn CN116295091A (en)

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Application Number Priority Date Filing Date Title
CN202211681811.3A CN116295091A (en) 2022-12-27 2022-12-27 Novel measuring method and device for out-of-roundness of gas cylinder

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Application Number Priority Date Filing Date Title
CN202211681811.3A CN116295091A (en) 2022-12-27 2022-12-27 Novel measuring method and device for out-of-roundness of gas cylinder

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CN116295091A true CN116295091A (en) 2023-06-23

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