CN116147539B - Novel measuring method and device for straightness of gas cylinder - Google Patents

Novel measuring method and device for straightness of gas cylinder Download PDF

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Publication number
CN116147539B
CN116147539B CN202310334380.1A CN202310334380A CN116147539B CN 116147539 B CN116147539 B CN 116147539B CN 202310334380 A CN202310334380 A CN 202310334380A CN 116147539 B CN116147539 B CN 116147539B
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gas cylinder
camera
straightness
support rod
base
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CN116147539A (en
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张冰
韩影
巩会平
宋雪
李智
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Shandong Sysbal Electromechanical Technology Service Co ltd
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Shandong Sysbal Electromechanical Technology Service Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/26Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B11/27Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/32Hydrogen storage

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

Abstract

The invention discloses a novel measuring method and device for straightness of a gas cylinder, which comprises a depth camera, a camera supporting rod and a circular base, and is characterized in that: the camera comprises a camera support rod, a camera angle adjusting shaft, a telescopic rod, a bottom support rod and a support rod base, wherein the camera support rod is arranged on the upper side of the camera support rod, the camera is arranged at the top of the camera support rod, and the camera support rod sequentially comprises the camera angle adjusting shaft, the telescopic rod, the bottom support rod and the support rod base from top to bottom. The invention relates to the field of industrial gas cylinder inspection and detection, in particular to a novel gas cylinder straightness measuring method and device. The invention aims to solve the technical problem of providing a novel measuring method and device for the straightness of a gas cylinder, which can judge whether the straightness of the gas cylinder to be measured meets the standard requirement or not according to the coordinate value of the upper point of the gas cylinder measured by a depth camera and transmitted to a computer for calculation. The straightness data detected by the method is quicker and more accurate, helps a factory to improve the inspection efficiency, and ensures that the gas cylinder meets the production standard.

Description

Novel measuring method and device for straightness of gas cylinder
Technical Field
The invention relates to the field of industrial gas cylinder inspection and detection, in particular to a novel gas cylinder straightness measuring method and device.
Background
Any offset in the horizontal direction of a straight line is called horizontal straightness and the vertical direction is called vertical straightness. In the gas cylinder production standard, the straightness of the gas cylinder is specifically required, and gas cylinders exceeding a specified range are regarded as defective products. In actual production, the traditional manual measurement mode has longer detection time, lower detection efficiency and higher detection cost.
If the straightness of the gas cylinder can be measured through the light-shadow relation, the method is favorable for improving the automation degree and accelerating the detection speed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel measuring method and device for the straightness of a gas cylinder, which can judge whether the straightness of the gas cylinder to be measured meets the standard requirement or not according to the coordinate value of the upper point of the gas cylinder measured by a depth camera and transmitted to a computer for calculation. The straightness data detected by the method is quicker and more accurate, helps a factory to improve the inspection efficiency, and ensures that the gas cylinder meets the production standard.
The invention adopts the following technical scheme to realize the aim of the invention:
the utility model provides a novel measuring method and device of gas cylinder straightness accuracy, includes degree of depth camera, camera bracing piece and circular base, its characterized in that: the camera comprises a camera support rod, a camera angle adjusting shaft, a telescopic rod, a bottom support rod and a support rod base, wherein the camera is located on the upper side of the camera support rod, the camera is installed on the top of the camera support rod, the camera support rod sequentially comprises the camera angle adjusting shaft, the telescopic rod, the bottom support rod and the support rod base from top to bottom, the camera angle adjusting shaft, the telescopic rod, the bottom support rod and the support rod base are sequentially and fixedly connected, the camera is installed on the upper side of the camera angle adjusting shaft, the round base sequentially comprises a matching base, a rotary table and a round base from top to bottom, the matching base is fixedly connected with the rotary table, and the rotary table is rotationally connected with the round base.
As a further limitation of the technical scheme, the telescopic rod is pulled up and down, and the front elevation angle and the back elevation angle of the camera angle adjusting shaft are adjusted, so that the up-down height and the shooting angle of the depth camera are adjusted, and the depth camera can be used for measuring different measured gas cylinders.
As a further limitation of the technical scheme, the measured gas cylinders completely fit with the matching bases, and the corresponding matching bases are replaced according to the measured gas cylinders with different diameters.
By further limiting the technical scheme, the turntable is rotated, so that the tested gas cylinder can automatically rotate along the vertical axis, and the data can be measured for a plurality of times after the angle is changed, so that the accuracy of the measured data can be ensured.
The novel measuring method for the straightness of the gas cylinder is characterized by comprising the following steps of:
step one: placing the camera support rod and the circular base on the ground so that the support rod base and the circular chassis contact the ground;
step two: placing a measured gas cylinder in the matching base, ensuring that the matching base corresponds to the measured gas cylinder in shape, and ensuring that the center point of the matching base and the center point of the measured gas cylinder are on the same vertical line;
step three: according to the height of the gas cylinder to be measured, adjusting the telescopic quantity of the telescopic rod and the angle of the camera angle adjusting shaft to enable the position of the depth camera to be matched with the gas cylinder to be measured;
step four: the depth camera is opened to shoot the gas cylinder to be detected, the depth camera shoots and obtains coordinate data of each point on the gas cylinder to be detected, the data are transmitted to the computer, the coordinate data of the needed point are screened, and the straightness of the gas cylinder to be detected is obtained according to a straightness formula;
step five: for measuring accuracy, the measured gas cylinder rotates for a certain angle along with the turntable on the circular base, and is shot and measured for a plurality of times, so that new coordinate data is formed through shooting, and then the computer calculates the new coordinate data to check whether the new coordinate data is consistent with the result obtained before;
step six: the measured gas cylinder rotates to calculate straightness of different angles, wherein the maximum value is required to meet the requirement of straightness in the gas cylinder production standard, and the maximum value is usually not more than 0.3%, which indicates that the measured gas cylinder does not meet the requirement of straightness, namely a disqualified product.
As a further limitation of the present technical solution, the specific steps of the computer processing data are:
step four, first: the computer selects three points of upper, middle and lower on a plurality of longitudinal sections of the gas cylinder to be tested, which are shot by the depth camera, and the boundary line in front of the longitudinal sections is called a front longitudinal tangent line, and takes three points from the front longitudinal tangent line by taking the front longitudinal tangent line as an example: A. b and C;
step four, two: and taking the straight line where the perpendicular lines of A, C are located as the Y axis. The other two axes are X and Z axes respectively, and the coordinates of A are (X a ,y a ,z a ) B has the coordinates (x) b ,y b ,z b ) C has the coordinates (x) c ,y c ,z c ) The abscissa values of the selected A, B and C three points are the same, i.e. x a =x b =x c
And step four, three: the straightness can be obtained by substituting the numerical value into a straightness calculation formula, and the straightness calculation formula is as follows:
wherein: s is a perpendicularity coefficient;
deltar is the maximum distance between the point B taken by the gas cylinder to be measured and the perpendicular line of the two points AC;
L 0 the vertical distance between the two points of the AC is taken from the upper and lower sides of the gas cylinder to be measured.
As further limitation of the technical scheme, the point A is 2-10cm below a node of the side straight line part where the arc transition of the shoulder of the gas cylinder to be detected is carried out;
b, taking the point with the maximum bending value on the front longitudinal cutting line;
and the distance between the point C and the bottommost surface of the measured gas cylinder is about 2 cm to 10cm.
As a further limitation of the present technical solution, in the fourth step:
take the selected A, B and C three points as examples;
when z a >z c When Δr=z a -z b
When z a <z c When Δr=z c -z b
L 0 =y a -y b
Compared with the prior art, the invention has the advantages and positive effects that:
1. the measuring method and the measuring device for the straightness of the gas cylinder can realize the rapid detection of the straightness 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 verticality and ensuring the accuracy of inspection.
3. The measuring method and the measuring device for the straightness of the gas cylinder mainly comprise a depth camera, a camera supporting rod and a round base, and are simple in structure and easy to operate. The matching base corresponding to the gas cylinders with different diameters can be replaced according to the gas cylinders with different diameters, so that the straightness 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 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 base structure of the present invention.
Fig. 5 is a schematic diagram showing the extraction of coordinate data of a desired measurement point on a gas cylinder according to the present invention.
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, a supporting rod base, 3, a round base, 31, a matching base, 32, a turntable, 33, a round chassis, 4, a measured gas cylinder, 5, the ground, 6 and a coordinate axis direction schematic formed by shooting the depth camera body, 7 and a depth camera shooting visual field range schematic, and 8, selecting a coordinate data schematic diagram of a required measuring point.
Detailed Description
One embodiment of the present invention will be described in detail below with reference to the attached drawings, but it should be understood that the scope of the present invention is not limited by the embodiment.
As shown in fig. 1-5, the invention comprises a depth camera 1, a camera support rod 2 and a circular base 3, wherein the depth camera 1 is positioned on the upper side of the camera support rod 2, the depth camera 1 is installed on the top of the camera support rod 2, the camera support rod 2 sequentially comprises a camera angle adjusting shaft 21, a telescopic rod 22, a bottom support rod 23 and a support rod base 24 from top to bottom, the camera angle adjusting shaft 21, the telescopic rod 22, the bottom support rod 23 and the support rod base 24 are sequentially and fixedly connected, the depth camera 1 is installed on the upper side of the camera angle adjusting shaft 21, the circular base 3 sequentially comprises a matching base 31, a turntable 32 and a circular base 33 from top to bottom, the matching base 31 is fixedly connected with the turntable 32, and the turntable 32 is rotationally connected with the circular base 33.
The telescopic rod 22 is pulled up and down, and the front and back elevation angle of the camera angle adjusting shaft 21 is adjusted, so that the up and down height and shooting angle of the depth camera 1 are adjusted, and the depth camera can be used for measuring different measured gas cylinders 4.
The telescopic rod 22 can be used for manually adjusting the telescopic amount mechanically, and also can be an electric push rod and a hydraulic rod.
The measured gas cylinders 4 are completely matched with the matching base 31, and the matching base 31 corresponding to the measured gas cylinders 4 with different diameters is replaced according to the measured gas cylinders 4.
The upper part of the matching base 31 is a conical bulge which is matched with the conical recess at the bottom of the measured gas cylinder 4.
The mating base 31 is of various types.
The turntable 32 is rotated to realize the self-rotation of the measured gas cylinder 4 along the vertical axis, and the data are measured for a plurality of times after the angle is changed, so as to ensure the accuracy of the measured data.
A novel measuring method for straightness of a gas cylinder comprises the following steps:
step one: placing the camera support bar 2 and the circular base 3 on the ground 5 such that the support bar base 24 and the circular base 33 contact the ground 5;
step two: placing the gas cylinder 4 to be tested in the matching base 31, ensuring that the shape of the matching base 31 corresponds to that of the gas cylinder 4 to be tested, and ensuring that the center point of the matching base 31 and the center point of the gas cylinder 4 to be tested are on the same vertical line;
step three: according to the height of the measured gas cylinder 4, adjusting the telescopic quantity of the telescopic rod 22 and the angle of the camera angle adjusting shaft 21 to enable the position of the depth camera 1 to be matched with the measured gas cylinder 4;
step four: the depth camera 1 is opened to shoot the gas cylinder 4 to be detected, the depth camera 1 shoots and obtains coordinate data of each point on the gas cylinder 4 to be detected, the data are transmitted to a computer, the coordinate data of the required point are screened, and the straightness of the gas cylinder 4 to be detected is obtained according to a straightness formula;
the specific steps of the computer processing data are as follows:
step four, first: the computer selects three points of upper, middle and lower on a plurality of longitudinal sections of the gas cylinder 4 to be measured, which are shot by the depth camera 1, and the boundary line in front of the longitudinal sections is called a front longitudinal tangent line, taking the front longitudinal tangent line as an example, and three points are taken from the front longitudinal tangent line: A. b and C;
the point A is 2-10cm below the node from the arc transition of the shoulder of the measured gas cylinder 4 to the straight line part of the side surface;
b, taking the point with the maximum bending value on the front longitudinal cutting line;
and the distance between the point C and the bottommost surface of the measured gas cylinder 4 is about 2 cm to 10cm.
Step four, two: and taking the straight line where the perpendicular lines of A, C are located as the Y axis. The other two axes are X and Z axes respectively, and the coordinates of A are (X a ,y a ,z a ) B has the coordinates (x) b ,y b ,z b ) C has the coordinates (x) c ,y c ,z c ) The abscissa values of the selected A, B and C three points are the same, i.e. x a =x b =x c
And step four, three: the straightness can be obtained by substituting the numerical value into a straightness calculation formula, and the straightness calculation formula is as follows:
wherein: s is a perpendicularity coefficient;
deltar is the maximum distance between the point B taken by the gas cylinder to be measured and the perpendicular line of the two points AC;
L 0 the vertical distance between the two points of the AC is taken from the upper and lower sides of the gas cylinder to be measured.
Take the selected A, B and C three points as examples;
when z a >z c When Δr=z a -z b
When z a <z c When Δr=z c -z b
L 0 =y a -y b
Step five: for measuring accuracy, the measured gas cylinder 4 rotates with the turntable 32 on the circular base 3 for a certain angle, and is photographed and measured for a plurality of times, so that new coordinate data is formed through photographing, and then the computer calculates the new coordinate data to check whether the new coordinate data is consistent with the previous measured result;
step six: the measured gas cylinder 4 rotates to calculate straightness of different angles, wherein the maximum value must meet the requirement of straightness in the gas cylinder production standard, usually not more than 0.3%, and the computer can give an alarm when exceeding the value, so that the measured gas cylinder 4 does not meet the requirement of straightness, namely a disqualified product.
The above disclosure is merely illustrative of specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be considered by those skilled in the art should fall within the scope of the present invention.

Claims (2)

1. The utility model provides a novel measurement of gas cylinder straightness accuracy device, includes depth camera (1), camera bracing piece (2) and circular base (3), its characterized in that:
the depth camera (1) is positioned on the upper side of the camera supporting rod (2), and the depth camera (1) is arranged on the top of the camera supporting rod (2);
the camera support rod (2) sequentially comprises a camera angle adjusting shaft (21), a telescopic rod (22), a bottom support rod (23) and a support rod base (24) from top to bottom;
the camera angle adjusting shaft (21), the telescopic rod (22), the bottom supporting rod (23) and the supporting rod base (24) are fixedly connected in sequence;
the depth camera (1) is arranged on the upper side of the camera angle adjusting shaft (21);
the round base (3) comprises a matching base (31), a rotary table (32) and a round chassis (33) from top to bottom in sequence;
the matching base (31) is fixedly connected with the rotary table (32), and the rotary table (32) is rotationally connected with the circular chassis (33);
the upper part of the matching base (31) is a conical bulge which is matched with the conical concave at the bottom of the gas cylinder (4) to be tested; the gas cylinder (4) to be tested is completely matched with the matching base (31), and the matching base (31) corresponding to the gas cylinder (4) to be tested with different diameters is replaced according to the gas cylinder (4) to be tested;
the measuring method using the measuring device for the straightness of the novel gas cylinder comprises the following steps:
step one: placing the camera support rod (2) and the circular base (3) on the ground (5) so that the support rod base (24) and the circular base plate (33) are in contact with the ground (5);
step two: placing a gas cylinder (4) to be tested in the matching base (31), ensuring that the shape of the matching base (31) corresponds to that of the gas cylinder (4) to be tested, and ensuring that the center point of the matching base (31) and the center point of the gas cylinder (4) to be tested are on the same vertical line;
step three: according to the height of the gas cylinder (4) to be measured, adjusting the expansion amount of the expansion rod (22) and the angle of the camera angle adjusting shaft (21) to enable the position of the depth camera (1) to be matched with the gas cylinder (4) to be measured;
step four: the depth camera (1) is opened to shoot the gas cylinder (4) to be detected, the depth camera (1) shoots and obtains coordinate data of each point on the gas cylinder (4) to be detected, the data are transmitted to a computer, the coordinate data of the required point are screened, and the straightness of the gas cylinder (4) to be detected is obtained according to a straightness formula; the specific steps of the computer processing data are as follows:
step four, first: the computer selects three points of upper, middle and lower on a plurality of longitudinal sections of the gas cylinder (4) to be tested, which are shot by the depth camera (1), the boundary line in front of the longitudinal section is called a front longitudinal tangent line, and three points are sequentially taken from the front longitudinal tangent line from top to bottom: A. b and C; wherein, the point A is 2 cm to 10cm below the node of the arc transition from the shoulder of the gas cylinder (4) to be tested to the side straight line part; b, taking the point with the maximum bending value on the front longitudinal cutting line; the distance between the point C and the bottommost surface of the detected gas cylinder (4) is 2-10cm;
step four, two: taking the straight line of A, C perpendicular lines as Y axis, the other two axes as X and Z axes, and the coordinate of A as (X) a ,y a ,z a ) B has the coordinates (x) b ,y b ,z b ) C has the coordinates (x) c ,y c ,z c ) The abscissa values of the selected A, B and C three points are the same, i.e. x a =x b =x c
And step four, three: the straightness can be obtained by substituting the numerical value into a straightness calculation formula, and the straightness calculation formula is as follows:
wherein: s is a perpendicularity coefficient;
Δr is the distance between the B point of the measured gas cylinder and the perpendicular line of the two points AC;
L 0 the vertical distance between two points of the AC is taken from the upper and lower sides of the gas cylinder to be measured;
when z a >z c When Δr=z a -z b
When z a <z c When Δr=z c -z b
L 0 =y a -y b
Step five: for measuring accuracy, the measured gas cylinder (4) rotates for a certain angle along with the rotary table (32) on the circular base (3), the rotary table (32) is rotated, the measured gas cylinder (4) automatically rotates along a vertical axis, multiple shooting and measurement are carried out after the angle is changed, new coordinate data are formed through shooting, and then calculation is carried out by a computer, so that whether the measured gas cylinder is consistent with the previous measured result or not is checked;
step six: the measured gas cylinder (4) rotates to calculate straightness of different angles, wherein the maximum value is required to meet the requirement of straightness in the gas cylinder production standard, and the maximum value is usually not more than 0.3%, which indicates that the measured gas cylinder (4) does not meet the requirement of straightness, namely a disqualified product.
2. The novel measurement device for straightness of a gas cylinder according to claim 1, wherein: the telescopic rod (22) is pulled up and down, and the front elevation and the back elevation of the camera angle adjusting shaft (21) are adjusted, so that the adjustment of the height and the shooting angle of the depth camera (1) is realized, and the measurement of the gas cylinders (4) with different heights is used.
CN202310334380.1A 2023-03-31 2023-03-31 Novel measuring method and device for straightness of gas cylinder Active CN116147539B (en)

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CN213903335U (en) * 2020-10-13 2021-08-06 上海市特种设备监督检验技术研究院 Steam active type infrared thermal imaging device for detecting defects of wound gas cylinder
CN214583093U (en) * 2021-04-25 2021-11-02 潍坊天恒检测科技有限公司 Device for detecting verticality of glass bottle by camera
CN115463858A (en) * 2022-09-26 2022-12-13 江苏润模汽车检测装备有限公司 Automatic detection device and detection method for aluminum bottles

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