CN112781507A - Intelligent analysis system and method for laser thickness measurement of cold-rolled steel plate - Google Patents
Intelligent analysis system and method for laser thickness measurement of cold-rolled steel plate Download PDFInfo
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- CN112781507A CN112781507A CN202011552199.0A CN202011552199A CN112781507A CN 112781507 A CN112781507 A CN 112781507A CN 202011552199 A CN202011552199 A CN 202011552199A CN 112781507 A CN112781507 A CN 112781507A
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- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 31
- 238000004458 analytical method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 110
- 239000010959 steel Substances 0.000 claims abstract description 110
- 239000011159 matrix material Substances 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000012937 correction Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 7
- 238000004364 calculation method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
Abstract
The invention discloses a laser thickness measurement intelligent analysis system and method for a cold-rolled steel plate. The system is used for measuring the thickness of a steel plate, and comprises: the system comprises a 3D camera, a light source and an industrial personal computer; the 3D camera is installed above the steel plate in the steel plate production line and used for obtaining a 3D image of the steel plate, the light source is installed on one side of the 3D camera and used for providing structured light required by the 3D camera to scan, and the industrial personal computer is connected with the 3D camera and used for obtaining a point cloud matrix corresponding to the 3D image and calculating the thickness value of the steel plate according to the point cloud matrix. The method comprises the following steps: acquiring a 3D image of a steel plate; processing the 3D image by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image; and calculating the thickness value of the steel plate based on the point cloud matrix. According to the intelligent analysis system and method for the laser thickness measurement of the cold-rolled steel plate, the thickness of the steel plate can be intelligently measured by using the 3D camera and the industrial personal computer, the measurement efficiency and the measurement precision are high, the operation is convenient, and the operation process is safe.
Description
Technical Field
The invention relates to the technical field of thickness measurement, in particular to a laser thickness measurement intelligent analysis system and method for a cold-rolled steel plate.
Background
The thickness of a steel sheet is one of important indexes of the specification of the steel sheet, and the detection of the thickness of the steel sheet is an important process in the production of the steel sheet, and affects the production of the steel sheet. Because the steel sheet is in the mobile state among the steel sheet production line, adopt X ray measuring apparatu to measure the thickness of steel sheet at present, nevertheless because X ray is invisible light, and can cause the harm to the human body, if operating personnel uses X ray measuring apparatu to measure the steel sheet thickness for a long time, can endanger operating personnel's self life and health, have higher potential safety hazard.
Disclosure of Invention
In order to solve part or all of technical problems in the prior art, the invention provides an intelligent analysis system and method for laser thickness measurement of a cold-rolled steel sheet.
In a first aspect, the invention discloses an intelligent analysis system for laser thickness measurement of a cold-rolled steel plate, which is used for measuring the thickness of the steel plate and comprises: the system comprises a 3D camera, a light source and an industrial personal computer;
the 3D camera is installed above a steel plate in a steel plate production line and used for acquiring a 3D image of the steel plate, the light source is installed on one side of the 3D camera and used for providing structured light required by the 3D camera to scan, the industrial personal computer is connected with the 3D camera and used for acquiring a point cloud matrix corresponding to the 3D image and calculating the thickness value of the steel plate according to the point cloud matrix.
In some optional embodiments, the system further comprises a support frame on which the 3D camera and the light source are mounted, the 3D camera being disposed above the steel plate through the support frame.
In some alternative embodiments, the support frame is a door frame structure, and the steel plate can pass through the support frame through an opening of the support frame.
In some optional embodiments, the industrial personal computer is provided with a user interface, and the user interface is used for displaying a deviation curve chart of the thickness value of the steel plate and a target value under the control of the industrial personal computer, and is used for realizing other functions of a user operating the laser thickness measurement intelligent analysis system for the cold-rolled steel plate.
In a second aspect, the invention further discloses an intelligent analysis method for laser thickness measurement of a cold-rolled steel sheet, which is implemented by using the intelligent analysis system for laser thickness measurement of a cold-rolled steel sheet, and comprises the following steps:
acquiring a 3D image of a steel plate;
processing the 3D image by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image;
and calculating the vertical distance between different point positions on the upper surface of the steel plate and the horizontal plane where the 3D camera is located based on the point cloud matrix, comparing the vertical distance with the vertical distance between the point position of the steel plate with the standard thickness and the horizontal plane where the 3D camera is located, and obtaining the difference value between the surface point positions of the steel plate with different thicknesses and the thickness value of the steel plate.
In some optional embodiments, the acquiring a 3D image of a steel plate includes:
and scanning the surface of the steel plate by using a 3D camera to acquire a 3D image of the steel plate.
In some optional embodiments, the method further comprises:
and compensating the steel plate thickness value obtained based on the point cloud matrix by using the correction value, and determining the final value of the steel plate thickness.
In some optional embodiments, the method further comprises:
and comparing the thickness value of the steel plate with a target value of the steel plate, and acquiring a deviation curve chart of the thickness value and the target value.
The technical scheme of the invention has the following main advantages:
according to the intelligent analysis system and method for the laser thickness measurement of the cold-rolled steel plate, the thickness of the steel plate can be intelligently measured by using the 3D camera and the industrial personal computer, the measurement efficiency and the measurement precision are high, the operation is convenient, and the operation process is safe.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an intelligent analysis system for laser thickness measurement of cold-rolled steel sheets according to an embodiment of the present invention, wherein an industrial personal computer is not shown;
fig. 2 is a flowchart of an intelligent analysis method for laser thickness measurement of a cold-rolled steel sheet according to an embodiment of the present invention.
Description of reference numerals:
1-3D camera, 2-light source, 3-support frame and 4-steel plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, in a first aspect, an embodiment of the present invention provides an intelligent analysis system for laser thickness measurement of a cold-rolled steel sheet, the system is used for measuring the thickness of the steel sheet, and the system includes: the device comprises a 3D camera, a light source and an industrial personal computer, wherein the 3D camera is installed above a steel plate in a steel plate production line and used for acquiring a 3D image of the steel plate, the light source is installed on one side of the 3D camera and used for providing structured light required by the 3D camera to scan, and the industrial personal computer is connected with the 3D camera and used for acquiring a point cloud matrix corresponding to the 3D image and calculating the thickness value of the steel plate according to the point cloud matrix.
Specifically, when the intelligent analysis system for laser thickness measurement of the cold-rolled steel plate provided by the embodiment of the invention is used, the 3D camera is used for scanning the surface of the steel plate to obtain a 3D image of the steel plate, the obtained 3D image is sent to the industrial personal computer, the industrial personal computer receives the 3D image, and the 3D image is processed by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image; and then, the industrial personal computer calculates the thickness value of the steel plate according to the obtained point cloud matrix.
Further, in consideration of system errors existing when the 3D camera and the industrial personal computer perform image processing calculation, in an embodiment of the invention, in order to improve the accuracy of the obtained thickness value of the steel plate, when the thickness value of the steel plate is calculated, the industrial personal computer calculates the thickness calculation value of the steel plate according to the point cloud matrix, and then compensates the thickness calculation value by using the correction value to determine the thickness value of the steel plate.
Wherein, the corrected value can be confirmed according to the performance parameters and the system errors of the 3D camera and the industrial personal computer.
Referring to fig. 1, in an embodiment of the present invention, the system may further include a support frame, the 3D camera and the light source are mounted on the support frame, and the 3D camera is disposed above the steel plate through the support frame.
So set up, can be convenient for the installation of 3D camera and light source and be convenient for the 3D camera to scan the shooting to the steel sheet through setting up the support frame.
Optionally, the support frame is a door frame structure, and the steel plate can pass through the support frame through the opening of the support frame.
So set up, can make things convenient for the 3D camera to scan the shooting to whole steel sheet, the mobile control of the steel sheet of can being convenient for again avoids steel sheet and support frame and 3D camera to take place the position interference.
Optionally, the industrial personal computer is provided with a user interface, and the user interface is used for displaying a deviation curve chart of the thickness value and the target value of the steel plate under the control of the industrial personal computer and is used for realizing other functions of a user operating the laser thickness measurement intelligent analysis system of the cold-rolled steel plate. Other functions include, for example: setting user authority, checking user logs, checking average thickness values of steel plates, checking deviation curve graphs, checking detailed information of current steel plates and the like.
The deviation curve chart of the thickness value of the steel plate and the target value of the steel plate obtained through calculation is displayed through the user interface arranged on the industrial personal computer, and whether the thickness of the steel plate is abnormal or not can be conveniently observed by an operator.
Further, in order to facilitate the operator to know the calculated thickness value of the steel plate, the industrial personal computer may set a thickness value to be displayed every set distance in the user interface. Wherein the set distance can be specifically set by an operator.
In order to facilitate the setting of the set distance by the operator, in an embodiment of the invention, the industrial personal computer can be provided with a human-computer interaction interface, and the operator can modify and adjust the set distance through the human-computer interaction interface of the industrial personal computer.
Referring to fig. 2, in a second aspect, an embodiment of the present invention further provides a method for performing laser thickness measurement intelligent analysis on a cold-rolled steel sheet, where the method is performed by using the above-mentioned system for performing laser thickness measurement intelligent analysis on a cold-rolled steel sheet, and the method includes:
acquiring a 3D image of a steel plate;
processing the 3D image by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image;
and calculating the vertical distance between different point positions on the upper surface of the steel plate and the horizontal plane where the 3D camera is located based on the point cloud matrix, comparing the vertical distance with the vertical distance between the point position of the steel plate with the standard thickness and the horizontal plane where the 3D camera is located, and obtaining the difference value between the surface point positions of the steel plate with different thicknesses and the thickness value of the steel plate.
The following is a detailed description of the steps and principles of the intelligent analysis method for laser thickness measurement of cold-rolled steel sheets according to an embodiment of the present invention.
Step S1, acquiring a 3D image of the steel plate;
specifically, based on the above-mentioned cold-rolled steel sheet laser thickness measurement intelligent analysis system, acquiring a 3D image of the steel sheet includes: and scanning the surface of the steel plate by using a 3D camera to acquire a 3D image of the steel plate.
Step S2, processing the 3D image by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image;
specifically, the industrial personal computer receives a 3D image scanned and shot by the 3D camera, and the 3D image is processed by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image.
When the 3D camera is in use, a light source on one side of the 3D camera emits structured light, and the target distance is obtained by continuously transmitting light pulses to a target, and then receiving light returning from the target by using a sensor, and detecting the round-trip time of the light pulses. The 3D camera outputs the depth information of each measuring point to the industrial personal computer, the industrial personal computer processes the camera data, the depth information reflected on the software is two-dimensional depth point cloud information, namely the originally obtained information is an image, and the value of each point represents the distance value between the camera and the target.
Step S3, calculating the vertical distance between different point positions on the upper surface of the steel plate and the horizontal plane where the 3D camera is located based on the point cloud matrix, comparing the vertical distance with the vertical distance between the point position of the steel plate with the standard thickness and the horizontal plane where the 3D camera is located, and obtaining the difference value between the point positions on the surface of the steel plate with different thickness and the standard thickness to obtain the thickness value of the steel plate;
specifically, a distance value between a standard thickness steel plate and a camera is determined, then a deviation value between the current steel plate thickness and the standard steel plate thickness is obtained according to the depth point cloud information, and the current steel plate thickness is calculated according to the deviation value.
The distance value between the standard thickness steel plate and the camera is a fixed value measured during system installation.
Because there is a systematic error when the 3D camera and the industrial personal computer perform image processing calculation, in an embodiment of the present invention, the method may further include:
and compensating the steel plate thickness value obtained based on the point cloud matrix by using the correction value, and determining the final value of the steel plate thickness.
The correction value can be determined according to performance parameters and system errors of the 3D camera and the industrial personal computer.
Further, in an embodiment of the present invention, the method further includes: and comparing the thickness value of the steel plate with a target value of the steel plate, and acquiring a deviation curve chart of the thickness value and the target value.
By comparing the thickness value of the steel plate with the target value of the steel plate, a deviation curve chart of the thickness value and the target value is obtained, and the thickness condition of the steel plate can be conveniently analyzed by a follow-up operator.
According to the intelligent analysis system and method for the laser thickness measurement of the cold-rolled steel plate, provided by the embodiment of the invention, the intelligent measurement of the thickness of the steel plate can be realized by using the 3D camera and the industrial personal computer, the measurement efficiency and the measurement precision are high, the operation is convenient, and the operation process is safe.
It is noted that, herein, relational terms such as "first" and "second," and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a cold-rolled steel sheet laser thickness measurement intelligence analytic system which characterized in that, the system is used for measuring the thickness of steel sheet, includes: the system comprises a 3D camera, a light source and an industrial personal computer;
the 3D camera is installed above a steel plate in a steel plate production line and used for acquiring a 3D image of the steel plate, the light source is installed on one side of the 3D camera and used for providing structured light required by the 3D camera to scan, the industrial personal computer is connected with the 3D camera and used for acquiring a point cloud matrix corresponding to the 3D image and calculating the thickness value of the steel plate according to the point cloud matrix.
2. The intelligent laser thickness measurement analysis system for cold-rolled steel sheets according to claim 1, further comprising a support frame, wherein said 3D camera and said light source are mounted on said support frame, and said 3D camera is disposed above said steel sheet through said support frame.
3. The laser thickness measurement intelligent analysis system for cold-rolled steel sheets according to claim 2, wherein the support frame is a door frame structure, and the steel sheet can pass through the support frame through the opening of the support frame.
4. The intelligent laser thickness measuring analysis system for the cold-rolled steel plate according to claim 1, wherein the industrial personal computer is provided with a user interface, and the user interface is used for displaying a deviation curve chart of the thickness value of the steel plate and a target value under the control of the industrial personal computer and realizing other functions of a user for operating the intelligent laser thickness measuring analysis system for the cold-rolled steel plate.
5. An intelligent analysis method for laser thickness measurement of a cold-rolled steel sheet, which is implemented by using the intelligent analysis system for laser thickness measurement of a cold-rolled steel sheet according to any one of claims 1 to 4, and comprises the following steps:
acquiring a 3D image of a steel plate;
processing the 3D image by using an image processing algorithm to obtain a point cloud matrix corresponding to the 3D image;
and calculating the vertical distance between different point positions on the upper surface of the steel plate and the horizontal plane where the 3D camera is located based on the point cloud matrix, comparing the vertical distance with the vertical distance between the point position of the steel plate with the standard thickness and the horizontal plane where the 3D camera is located, and obtaining the difference value between the surface point positions of the steel plate with different thicknesses and the thickness value of the steel plate.
6. The intelligent laser thickness measurement analysis method of a cold-rolled steel sheet according to claim 5, wherein the acquiring of the 3D image of the steel sheet comprises:
and scanning the surface of the steel plate by using a 3D camera to acquire a 3D image of the steel plate.
7. The intelligent analysis method for laser thickness measurement of cold rolled steel sheet according to claim 5, further comprising:
and compensating the steel plate thickness value obtained based on the point cloud matrix by using the correction value, and determining the final value of the steel plate thickness.
8. The intelligent analysis method for laser thickness measurement of cold rolled steel sheet according to claim 5, further comprising:
and comparing the thickness value of the steel plate with a target value of the steel plate, and acquiring a deviation curve chart of the thickness value and the target value.
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| CN202011552199.0A CN112781507A (en) | 2020-12-24 | 2020-12-24 | Intelligent analysis system and method for laser thickness measurement of cold-rolled steel plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20210511 |