CN113155060A - Object surface flatness detection method and detection equipment thereof - Google Patents
Object surface flatness detection method and detection equipment thereof Download PDFInfo
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- CN113155060A CN113155060A CN202110277617.8A CN202110277617A CN113155060A CN 113155060 A CN113155060 A CN 113155060A CN 202110277617 A CN202110277617 A CN 202110277617A CN 113155060 A CN113155060 A CN 113155060A
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- 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
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
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Abstract
The invention relates to a method and equipment for detecting the surface flatness of an object, comprising the following steps: a detachable fixing unit (15) is arranged to fix the laser emission platform (21) on the surface of the object to be measured, and the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); wherein, the sponge body is fixedly stuck on the working surface of the fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; and the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity.
Description
Technical Field
The invention relates to an optical measurement technology, in particular to a method and equipment for detecting the surface flatness of an object.
Background
The measurement of the surface flatness of an object has strong requirements in the field of industrial manufacturing, particularly a non-contact measurement mode, and has wide application in many fields such as precision manufacturing, aerospace, military and the like. The measurement of the surface flatness of an object can be classified into contact and non-contact measurement methods. The contact measurement is that the measuring head and the surface of the workpiece are in contact measurement, and the scanning movement is carried out along the shape of the workpiece. Its disadvantage is that it is liable to cause various degrees of damage to the surface being measured. Due to the development of laser measurement technology, a non-contact measurement mode has become the mainstream.
In the field of measuring the flatness and the gradient of a wall surface in construction, a detection ruler is mainly used at present. The principle of using a measuring ruler to measure flatness is similar to that of a 3m straight ruler in road surface detection, and the measuring ruler is contacted with a measured surface and then observes and measures gaps. The measuring ruler is also provided with instruments for measuring parameters such as gradient, levelness and verticality, and the inclination degree can be measured. The method is almost the only method for measuring the flatness of vertical wall surfaces, ceilings and floors in buildings at present, manual operation is needed, time and labor are wasted, comprehensive and visual results are difficult to obtain, and positions which are difficult to touch are not suitable for measurement by the method.
Patent No. 201610901267.7 discloses a method for optically measuring the flatness and inclination of an approximate plane, which uses the deviation between the projection of two intersection lines, i.e. the intersection line of a planar laser and a measured surface and the intersection line of the planar laser and an artificially defined standard plane, on the measured surface to calculate the offset between the measured surface and the standard plane at each position, and further obtain the flatness and inclination data of the whole measured surface, and is characterized by comprising the following steps: (1) artificially defining a standard mathematical plane corresponding to an actual measured plane, wherein the standard mathematical plane is as close to the measured plane as possible; (2) a laser emitter capable of emitting planar laser with a certain color is placed at a certain distance from the standard plane to emit laser to the measured surface, so that an included angle of 90 degrees is formed between the laser plane and the standard mathematical plane, and an area illuminated by laser irradiation on the measured surface is positioned on an intersection line of the laser plane and the two surfaces of the actual measured surface; (3) if the measured surface is not completely overlapped with the standard mathematical plane (i.e. uneven condition exists), the deviation exists between the area illuminated by the laser on the measured surface and the projection of the intersection line between the laser plane and the standard mathematical plane on the measured surface by taking the normal line of the standard plane as the projection line, and the difference value of each position on the projection line relative to the standard mathematical plane can be obtained by correspondingly calculating the deviation value; (4) the method comprises the steps that a picture irradiated by laser on a measured surface is shot through a digital shooting device, data of deviation of each position on the measured surface are collected, corresponding analysis is carried out on the picture through computer processing, and the concave-convex difference value of each point in a projection area on the measured surface, which takes the normal of a standard plane as a projection line, of the intersection line between the current laser plane and the standard mathematical plane on the measured surface relative to the standard mathematical plane is calculated; (5) changing the emission direction or position of the planar laser emitter, enabling the laser illumination area and the projection of the intersection line between the laser plane and the standard mathematical plane on the measured surface to sweep the whole measured surface by taking the normal line of the standard plane as the projection line, and synchronously repeating the step 4 for multiple times until the concave-convex difference value of the position represented by any pixel point in the picture of the whole measured surface relative to the standard plane can be calculated, thereby obtaining the overall flatness data of the measured surface; (6) after the difference of the whole measured surface relative to the standard plane is obtained, the integral inclination degree of the measured surface relative to the standard plane is known at the same time, and then the integral inclination degree of the measured surface in the space can be obtained through calculation as long as the determined shooting direction when the device is placed is read.
The present inventors have found that the above-described flatness detecting apparatus and detecting method have the following disadvantages: firstly, the flatness needs to be obtained by obtaining a large amount of data and then obtaining a result through calculation and data comparison, and the calculation amount is large and the time consumption is high. Secondly, the method needs to be realized by a computer and digital camera equipment, and is high in cost.
Disclosure of Invention
The invention aims to provide the object surface flatness detection equipment and the object surface flatness detection method which are simple to operate, high in precision, high in measurement speed and low in equipment cost.
The technical scheme adopted by the invention is as follows: a method for detecting the surface flatness of an object comprises the following steps:
a detachable fixing unit (15) is arranged to fix the laser emission platform (21) on the surface of the object to be measured, and the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); wherein, the sponge body is fixedly stuck on the working surface of the fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity;
at least one group of laser line modules (1) capable of emitting linear laser is arranged on the laser emitting platform (21); emitting a laser line to the surface of the object to be measured through the laser line module (1), so that an included angle of 90 degrees is formed between the laser line and the surface of the object to be measured, and an area which is irradiated and illuminated by the laser line appears on the surface of the object to be measured;
if the surface of the object to be measured is flat, the shape of the area irradiated and illuminated by the laser ray is a straight line;
if the surface of the object to be measured is uneven, the shape of the area irradiated and illuminated by the laser line is a curve with a recess and a bulge;
and changing the emission direction or position of the laser line module (1) to enable the laser line to sweep the surface of the whole object to be measured, and judging the flatness of the surface of the whole object to be measured according to the shape of the area irradiated and illuminated by the laser line.
Further, the method comprises the following steps:
set up a rotary platform and make laser emission platform can rotate to make the laser line that the laser line module was launched can shine the detected object surface of bigger area, and according to the regional shape that the laser line shines and illuminates, judge the roughness on detected object surface of bigger area.
Further, the method comprises the following steps: an angle adjusting unit is arranged on the laser emitting platform (21), and the emitting direction of the laser line module (1) is adjusted and changed through the angle adjusting unit; and a horizontal adjusting unit is arranged between the laser emitting platform and the rotating platform (16), and the position of the laser line module is adjusted and changed through the horizontal adjusting unit.
Furthermore, a horizontal observation unit is arranged on the laser emission platform (21), and the horizontal observation unit is connected with the laser line module and used for observing whether the laser line is horizontal or not.
An object surface flatness detection device comprises a laser emission platform (21) and a detachable fixing unit (15); the detachable fixing unit (15) is used for fixing the laser emitting platform on the surface (20) of the detected object;
the laser emission platform is provided with at least one group of laser line modules (1) which are used for emitting laser lines to the surface (20) of the detected object;
the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); the sponge body is fixedly adhered to the working surface of the detachable fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; and the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity.
Further, a rotation platform (16) is provided between the laser emitting platform and the detachable fixed unit for rotating the laser emitting platform over the detachable fixed unit.
Furthermore, an angle adjusting unit is arranged on the laser emitting platform (21), and the emitting direction of the laser line module (1) is adjusted and changed through the angle adjusting unit; a horizontal adjusting unit is arranged between the laser emitting platform and the rotating platform (16), and the position of the laser line module is adjusted and changed through the horizontal adjusting unit.
Furthermore, a horizontal observation unit is arranged on the laser emission platform (21), and the horizontal observation unit is connected with the laser line module and used for observing whether the laser line is horizontal or not.
Preferably, the level adjustment unit comprises a first level adjustment wheel (5), a second level adjustment wheel (6) and a third level adjustment wheel (7).
Preferably, the horizontal observation unit comprises an X-axis horizontal observation module (8) and a Y-axis horizontal observation module (9) which are perpendicular to each other, and the X-axis horizontal observation module (8) and the Y-axis horizontal observation module are liquid horizontal bubbles or angle sensors.
The invention has the advantages that firstly, the detection equipment is detachably and directly arranged on the surface of the object to be detected, and the deviation of the surface of the object to be detected in the vertical direction is converted into the deviation in the parallel direction by a laser irradiation mode, so that the detection difficulty of the deviation is greatly reduced. Secondly, the deviation condition of the surface flatness of the measured object is completely reflected on the measured surface, only human eyes are needed to observe and analyze, a complex measuring tool does not need to be installed on measuring equipment, and the measuring device is low in cost and rapid to operate.
Drawings
FIG. 1 is a schematic structural diagram of the object surface flatness detecting apparatus according to the present invention during operation;
FIG. 2 is a schematic structural diagram of a top view angle of the object surface flatness detecting apparatus according to the present invention;
fig. 3 is a schematic cross-sectional view of the front view angle of the object surface flatness detecting apparatus according to the present invention.
In the figure, 1, a first laser line module; 3. a second laser line module; 2. a first angle adjustment wheel; 4. a second angle adjustment wheel; 5. a first horizontal adjustment wheel; 6. a second horizontal adjustment wheel; 7. a third horizontal adjustment wheel; 8. an X-axis horizontal observation module; 9. a Y-axis horizontal observation module; 10. a vacuum pump; 11. a body of sponge; 12. a connecting hose; 13. a battery; 15. a detachable fixed unit; 16. a rotation unit; 20. detecting the surface of an object to be detected; 21. a laser emitting platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first", "second" and "third" in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. All directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
As shown in fig. 1, fig. 2 and fig. 3, a method for detecting flatness of an object surface includes the following steps:
a detachable fixing unit (15) is arranged to fix the laser emission platform (21) on the surface of the object to be measured, and the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); wherein, the sponge body is fixedly stuck on the working surface of the fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity;
at least one group of laser line modules (1) capable of emitting linear laser is arranged on the laser emitting platform (21); emitting a laser line to the surface of the object to be measured through the laser line module (1), so that an included angle of 90 degrees is formed between the laser line and the surface of the object to be measured, and an area which is irradiated and illuminated by the laser line appears on the surface of the object to be measured;
if the surface of the object to be measured is flat, the shape of the area irradiated and illuminated by the laser ray is a straight line;
if the surface of the object to be measured is uneven, the shape of the area irradiated and illuminated by the laser line is a curve with a recess and a bulge;
and changing the emission direction or position of the laser line module (1) to enable the laser line to sweep the surface of the whole object to be measured, and judging the flatness of the surface of the whole object to be measured according to the shape of the area irradiated and illuminated by the laser line.
Further, the method comprises the following steps:
set up a rotary platform and make laser emission platform can rotate to make the laser line that the laser line module was launched can shine the detected object surface of bigger area, and according to the regional shape that the laser line shines and illuminates, judge the roughness on detected object surface of bigger area.
Further, the method comprises the following steps: an angle adjusting unit is arranged on the laser emitting platform (21), and the emitting direction of the laser line module (1) is adjusted and changed through the angle adjusting unit; and a horizontal adjusting unit is arranged between the laser emitting platform and the rotating platform (16), and the position of the laser line module is adjusted and changed through the horizontal adjusting unit.
Furthermore, a horizontal observation unit is arranged on the laser emission platform (21), and the horizontal observation unit is connected with the laser line module and used for observing whether the laser line is horizontal or not.
An object surface flatness detection device comprises a laser emission platform (21) and a detachable fixing unit (15); the detachable fixing unit (15) is used for fixing the laser emitting platform on the surface (20) of the detected object;
the laser emission platform is provided with a first laser line module (1) and a second laser line module (3); the first laser line module (1) and the second laser line module (3) are used for emitting laser lines to the surface (20) of the detected object;
the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); the sponge body is fixedly adhered to the working surface of the detachable fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; and the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity.
Further, a rotation platform (16) is provided between the laser emitting platform and the detachable fixed unit for rotating the laser emitting platform over the detachable fixed unit.
Furthermore, an angle adjusting unit is arranged on the laser emission platform (21), the angle adjusting unit comprises a first angle adjusting wheel (2) and a second angle adjusting wheel (4), and the emission directions of the first laser line module (1) and the second laser line module (3) are adjusted and changed through the first angle adjusting wheel (2) and the second angle adjusting wheel (4);
the laser emission platform with be equipped with the level (l) ing unit between rotary platform (16), the level (l) ing unit includes first level (l) ing wheel (5), second level (l) ing wheel (6) and third level (l) ing wheel (7), through first level (l) ing wheel (5), second level (l) ing wheel (6) and third level (l) ing wheel (7) adjustment change the position of first laser line module (1) and second laser line module (3).
Furthermore, a horizontal observation unit is arranged on the laser emission platform (21), the horizontal observation unit comprises an X-axis horizontal observation module (8) and a Y-axis horizontal observation module (9) which are perpendicular to each other, and the X-axis horizontal observation module (8) and the Y-axis horizontal observation module can be liquid horizontal bubbles or angle sensors. The horizontal observation unit is connected with the laser line module and used for observing whether the laser line is horizontal or not.
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 (10)
1. A method for detecting the surface flatness of an object comprises the following steps:
a detachable fixing unit is arranged to fix the laser emission platform on the surface of the measured object, and the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); wherein, the sponge body is fixedly stuck on the working surface of the fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity;
at least one group of laser line modules (1) capable of emitting linear laser is arranged on the laser emitting platform (21); emitting a laser line to the surface of the object to be measured through the laser line module (1), so that an included angle of 90 degrees is formed between the laser line and the surface of the object to be measured, and an area which is irradiated and illuminated by the laser line appears on the surface of the object to be measured;
if the surface of the object to be measured is flat, the shape of the area irradiated and illuminated by the laser ray is a straight line;
if the surface of the object to be measured is uneven, the shape of the area irradiated and illuminated by the laser line is a curve with a recess and a bulge;
and changing the emission direction or position of the laser line module (1) to enable the laser line to sweep the surface of the whole object to be measured, and judging the flatness of the surface of the whole object to be measured according to the shape of the area irradiated and illuminated by the laser line.
2. The method for detecting the flatness of the surface of an object according to claim 1, comprising the steps of:
set up a rotary platform and make laser emission platform can rotate to make the laser line that the laser line module was launched can shine the detected object surface of bigger area, and according to the regional shape that the laser line shines and illuminates, judge the roughness on detected object surface of bigger area.
3. The object surface flatness detecting method according to claim 1 or 2, comprising the steps of: an angle adjusting unit is arranged on the laser emitting platform (21), and the emitting direction of the laser line module (1) is adjusted and changed through the angle adjusting unit; and a horizontal adjusting unit is arranged between the laser emitting platform and the rotating platform (16), and the position of the laser line module is adjusted and changed through the horizontal adjusting unit.
4. The object surface flatness detecting method according to claim 1 or 2, comprising the steps of: the laser emission platform (21) is provided with a horizontal observation unit, and the horizontal observation unit is connected with the laser line module and used for observing whether the laser line is horizontal or not.
5. An object surface flatness detecting apparatus according to claim 1 or 2, comprising a laser emitting platform (21), and a detachable fixing unit (15); the detachable fixing unit (15) is used for fixing the laser emission platform on the surface (20) of the detected object; the laser emission platform is provided with at least one group of laser line modules (1) which are used for emitting laser lines to the surface (20) of the detected object;
the detachable fixing unit (15) comprises a battery (13), a vacuum pump (10), a connecting hose (12) and a sponge body (11); the sponge body is fixedly adhered to the working surface of the detachable fixing unit; when the working surface is tightly attached to the surface (20) of the object to be detected, the working surface, the surface (20) of the object to be detected and the sponge form a closed cavity; and the vacuum pump vacuumizes the closed cavity through the connecting hose to form a negative pressure adsorption cavity.
6. An object surface flatness detecting apparatus according to claim 5, wherein a rotating platform (16) is provided between said laser emitting platform and a detachable fixed unit, said rotating platform being adapted to rotate said laser emitting platform over said detachable fixed unit.
7. The object surface flatness detection apparatus according to claim 5 or 6, wherein an angle adjustment unit is arranged on the laser emission platform (21), and the emission direction of the laser line module (1) is adjusted and changed through the angle adjustment unit; a horizontal adjusting unit is arranged between the laser emitting platform and the rotating platform (16), and the position of the laser line module is adjusted and changed through the horizontal adjusting unit.
8. The object surface flatness detecting apparatus according to claim 6 or 7, wherein a level observing unit is disposed on the laser emitting platform (21), and the level observing unit is connected to the laser line module for observing whether the laser line is level.
9. The object surface flatness detection apparatus according to claim 7, wherein the leveling unit includes a first leveling wheel (5), a second leveling wheel (6), and a third leveling wheel (7).
10. The object surface flatness detecting apparatus according to claim 8, wherein the horizontal observing unit includes an X-axis horizontal observing module (8) and a Y-axis horizontal observing module (9) perpendicular to each other, and the X-axis horizontal observing module (8) and the Y-axis horizontal observing module are liquid horizontal bubbles or angle sensors.
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| CN202110277617.8A CN113155060A (en) | 2021-03-15 | 2021-03-15 | Object surface flatness detection method and detection equipment thereof |
| PCT/CN2021/081416 WO2022193202A1 (en) | 2021-03-15 | 2021-03-18 | Object surface flatness detection method and detection device thereof |
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| CN113670178A (en) * | 2021-10-22 | 2021-11-19 | 徐州苏力德木业有限公司 | Thick straightness measuring and marking device based on plate production and processing |
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| CN116222481A (en) * | 2023-05-06 | 2023-06-06 | 无锡麦格威精密机械有限公司 | New energy battery envelope contour degree automatic measuring instrument |
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| CN101650169A (en) * | 2009-07-17 | 2010-02-17 | 山东富美科技有限公司 | Scraper planeness detection system |
| JP2012198069A (en) * | 2011-03-18 | 2012-10-18 | Seiko Epson Corp | Flatness detection apparatus and flatness detection method |
| CN203587069U (en) * | 2013-11-16 | 2014-05-07 | 天津杰锋钢管工贸有限公司 | Pipe head leveling detection device |
| CN106248005A (en) * | 2016-10-16 | 2016-12-21 | 欧阳平 | A kind of optical measurement flatness and the method for gradient |
| JP2018096687A (en) * | 2016-12-07 | 2018-06-21 | 株式会社リコー | Light irradiator, optical sensor, and optical inspection apparatus |
| CN108917565A (en) * | 2018-04-08 | 2018-11-30 | 温州职业技术学院 | Adhesive material roughness detection equipments |
| CN207963843U (en) * | 2018-04-11 | 2018-10-12 | 苏州镒升机器人科技有限公司 | A kind of object plane degree detection device |
| CN109470182A (en) * | 2018-11-27 | 2019-03-15 | 中国航发长春控制科技有限公司 | A kind of avigation piece superhigh precision end face plane degree detection imaging device and detection method |
| CN110440724A (en) * | 2019-08-14 | 2019-11-12 | 莱赛激光科技股份有限公司 | A kind of planar smoothness detection device and detection method |
| CN110618138B (en) * | 2019-10-30 | 2022-06-07 | 安徽工业大学 | Method for detecting defects in display screen by using equal-thickness interference principle |
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| CN113670178A (en) * | 2021-10-22 | 2021-11-19 | 徐州苏力德木业有限公司 | Thick straightness measuring and marking device based on plate production and processing |
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