CN117629100A - 3D cambered surface measuring method based on two-dimensional laser image and detecting equipment thereof - Google Patents
3D cambered surface measuring method based on two-dimensional laser image and detecting equipment thereof Download PDFInfo
- Publication number
- CN117629100A CN117629100A CN202311331949.5A CN202311331949A CN117629100A CN 117629100 A CN117629100 A CN 117629100A CN 202311331949 A CN202311331949 A CN 202311331949A CN 117629100 A CN117629100 A CN 117629100A
- Authority
- CN
- China
- Prior art keywords
- detection
- laser
- point
- cambered surface
- starting point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 150
- 238000012795 verification Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 18
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims 5
- 230000008569 process Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 4
- 238000004441 surface measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a 3D cambered surface measuring method based on a two-dimensional laser image and a detecting device thereof, which comprises the following detecting steps: step one: placing a workpiece to be detected on a horizontal detection table top, and establishing a detection coordinate system based on the workpiece; step two: calibrating the starting point position of the cambered surface of the workpiece to be a detection starting point of an X axis; step three: the laser detection device performs movement detection along the X-axis direction by using the detection starting point, and performs a laser Z-axis height data calibration after each specific distance is moved by the laser detection device to obtain a data point; continuously detecting to obtain a 3D point data set; and 3D detection work of the cambered surface of the workpiece is realized according to the information of the 3D point data set. In the detection process, the generation of the cambered surface information of the workpiece is realized by integrating data points into a 3D point data set, the precision verification can be realized by comparing the cambered surface information with 3D drawing information or directly generating cambered surface image data, and the efficient and high-precision cambered surface detection work is realized.
Description
Technical Field
The invention belongs to the technical field of cambered surface detection, and relates to a 3D cambered surface measuring method based on a two-dimensional laser image and detection equipment thereof.
Background
In the traditional work piece cambered surface detection work, the cambered surface detection work is mainly realized by adopting a contact type measurement mode, however, the surface of some work pieces is also detected by adopting the contact type measurement mode due to the influences of the thickness of the product and the structural characteristics of materials, and the surface of the product can be scratched, deformed and the like; in order to solve the technical problem, the prior art mainly adopts a laser measurement mode to replace contact measurement, but the measurement method of laser measurement in the prior art has lower measurement precision, cannot realize the detection work of high-precision requirements, and does not meet the measurement requirements of high-precision products in the market.
Disclosure of Invention
In order to solve the technical problems, the invention adopts the following technical scheme:
A3D cambered surface measuring method based on a two-dimensional laser image comprises the following detection steps:
step one: the workpiece to be detected is placed on a horizontal detection table top, a detection coordinate system is established based on the workpiece, and the detection coordinate system comprises: an X-axis direction and a Z-axis direction;
step two: irradiating and detecting the workpiece from top to bottom along the Z-axis direction by using laser measuring equipment, and calibrating the starting point position of the cambered surface of the workpiece to be a detection starting point of an X-axis;
step three: the laser detection device performs movement detection along the X-axis direction by using the detection starting point, and performs a laser Z-axis height data calibration after each specific distance is moved by the laser detection device to obtain a data point; continuously detecting to obtain a 3D point data set; and 3D detection work of the cambered surface of the workpiece is realized according to the information of the 3D point data set.
As a further scheme of the invention: in the third step, the laser detection device performs a laser Z-axis height data calibration after each 0.2mm distance.
As a further scheme of the invention: in the second step, when the laser measuring device performs the calibration of the detection starting point, the laser measuring device adopts a continuous laser calibration mode to move from the plane position of the workpiece to the cambered surface position of the workpiece until the detection starting point is calibrated.
As a further scheme of the invention: the calibration distance of continuous laser calibration is controlled between 0.5mm and 1 mm.
As a further scheme of the invention: after the laser measuring equipment performs detection starting point calibration, the laser measuring equipment performs secondary verification on two sides of the X-axis direction of the detection starting point calibration by taking the detection starting point as the starting point to obtain the Z-axis heights of two detection points before and after the detection starting point, and a starting point front calibration point and a starting point rear calibration point are obtained; and the rechecking work of the detection starting point is realized.
As a further scheme of the invention: in the rechecking operation of the detection starting point, the moving distance of the laser measuring device along the X axis is smaller than the moving distance during the detection operation.
As a further scheme of the invention: the moving distance of the laser measuring device is 0.1mm-0.05mm.
As a further scheme of the invention: when the detection starting point is subjected to the rechecking operation, if the front calibration point of the starting point is different from the detection starting point, the laser measurement equipment can calibrate the front calibration point of the starting point as a new detection starting point, and the rechecking operation of the detection starting point is performed again until the accurate detection starting point is determined;
similarly, if the post-starting calibration point is the same as the detection starting point, the laser measurement device calibrates the post-starting calibration point to be a new detection starting point, and re-detection of the detection starting point is performed again until an accurate detection starting point is determined.
As a further scheme of the invention: and thirdly, comparing the information in the 3D point data set with the information in the 3D drawing information to realize the detection of the cambered surface of the workpiece.
As a further scheme of the invention: the method is characterized in that in the third step, cambered surface image data are obtained according to the information construction in the 3D point data set, and judgment and detection are directly carried out.
3D cambered surface measurement check out test set based on two-dimensional laser image includes: a detection group and a display group;
wherein, the detection group includes: the detection platform and the laser detection module are arranged on the detection platform, and the detection platform is arranged on a group of X-axis moving modules;
the display group includes: the main control host is used for realizing data recording and calculation work and the display screen is used for realizing data display work.
The invention has the beneficial effects that: the method has the advantages that high-precision laser detection work on the arc surface of the workpiece is realized, generation of arc surface information of the workpiece is realized in the detection process in a mode of integrating a 3D point data set through data points, precision verification can be realized in a mode of comparing with 3D drawing information or directly generating arc surface image data, and high-efficiency and high-precision arc surface detection work is realized.
Drawings
FIG. 1 is a schematic diagram of the detection method of the present invention.
Fig. 2 is a schematic diagram of a laser detection apparatus according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments, and the present application is not limited by the example embodiments described herein. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the embodiments of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and include, for example, either permanently connected, removably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention provides a 3D cambered surface measuring method based on a two-dimensional laser image, referring to FIG. 1, which comprises the following detection steps:
step one: the workpiece to be detected is placed on a horizontal detection table top, a detection coordinate system is established based on the workpiece, and the detection coordinate system comprises: an X-axis direction and a Z-axis direction;
step two: irradiating and detecting the workpiece from top to bottom along the Z-axis direction by using laser measuring equipment, and calibrating the starting point position of the cambered surface of the workpiece to be a detection starting point of an X-axis;
step three: the laser detection device performs movement detection along the X-axis direction by using the detection starting point, and performs a laser Z-axis height data calibration after each specific distance is moved by the laser detection device to obtain a data point; continuously detecting to obtain a 3D point data set; 3D detection work of the cambered surface of the workpiece is realized according to the information of the 3D point data set; the detection mode can be that the detection work of the cambered surface of the workpiece is realized by comparing the mode of leading in 3D drawing information with the information in the 3D point data set, or cambered surface image data is constructed according to the information in the 3D point data set, and the judgment and the detection are directly carried out; in the actual detection work process, a detection personnel can select one of the detection modes to carry out the detection work according to the actual situation, and can also simultaneously apply two detection methods to carry out the high-precision detection work in the high-precision workpiece detection work.
Furthermore, in the third step, after the laser detection device moves by 0.2mm, the laser detection device can perform the height data calibration of a laser Z axis, and under the detection distance, the high precision requirement of cambered surface detection can be ensured, and the detection efficiency can be improved maximally.
Further, in the second step, when the laser measurement device performs the calibration of the detection starting point, the laser measurement device adopts a continuous laser calibration mode to move from the plane position of the workpiece to the arc surface position of the workpiece until the detection starting point is calibrated, and the calibration distance of the continuous laser calibration is controlled between 0.5mm and 1mm, so that the detection precision can be ensured, and the marking efficiency can be maximized.
In order to achieve more accurate calibration of the detection starting point, after the laser measurement device performs calibration of the detection starting point, the laser measurement device performs secondary verification on two sides of the X-axis direction of the detection starting point by taking the detection starting point as the starting point, so as to obtain the Z-axis heights of two detection points before and after the detection starting point, and obtain a front calibration point and a rear calibration point of the starting point; realizing the rechecking work of the detection starting point;
under the verification mode, the position closest to the accurate detection starting point can be quickly found through continuous laser calibration, and the most accurate detection starting point is found through a secondary verification mode, so that the machining precision is ensured.
Further, in the rechecking operation of the detection starting point, the moving distance of the laser measuring device along the X axis is smaller than that in the detection operation, wherein the moving distance of the laser measuring device is preferably controlled to be between 0.1mm and 0.05mm.
Furthermore, during the rechecking operation of the detection starting point, if the front calibration point of the starting point is different from the detection starting point, the front calibration point of the starting point is represented to be closer to the actual starting point of the cambered surface of the workpiece than the original detection starting point, so that the laser measurement device can calibrate the front calibration point of the starting point as a new detection starting point, and rechecking operation of the detection starting point is performed again until the accurate detection starting point is determined;
similarly, if the post-starting calibration point is the same as the detection starting point, the laser measurement device calibrates the post-starting calibration point to be a new detection starting point, and re-detection of the detection starting point is performed again until an accurate detection starting point is determined.
As shown in fig. 2, in order to implement the above-mentioned 3D arc surface measurement method based on the two-dimensional laser image, the present invention further provides a 3D arc surface measurement detection device based on the two-dimensional laser image, including: detection group 1 and display group 2;
wherein, detection group 1 includes: the detection platform 12 and the laser detection module 11 are arranged on the detection platform 12, the detection platform 12 is arranged on a group of X-axis moving modules 13, and the X-axis moving modules 13 are used for realizing the movement of the phase position in the X-axis direction between a workpiece to be detected and the laser detection module 11, so as to realize the laser detection processing action;
the display group 2 includes: a main control host 22 for realizing data recording and calculation work and a display screen 21 for realizing data display work.
It is further noted that relational terms such as first and second, and the like 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. Moreover, 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. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The 3D cambered surface measuring method based on the two-dimensional laser image is characterized by comprising the following detecting steps of:
step one: the workpiece to be detected is placed on a horizontal detection table top, a detection coordinate system is established based on the workpiece, and the detection coordinate system comprises: an X-axis direction and a Z-axis direction;
step two: irradiating and detecting the workpiece from top to bottom along the Z-axis direction by using laser measuring equipment, and calibrating the starting point position of the cambered surface of the workpiece to be a detection starting point of an X-axis;
step three: the laser detection device performs movement detection along the X-axis direction by using the detection starting point, and performs a laser Z-axis height data calibration after each specific distance is moved by the laser detection device to obtain a data point; continuously detecting to obtain a 3D point data set; and 3D detection work of the cambered surface of the workpiece is realized according to the information of the 3D point data set.
2. The method for measuring 3D cambered surface based on the two-dimensional laser image according to claim 1, wherein in the third step, the laser detection device performs a laser Z-axis height data calibration after moving by 0.2mm each time.
3. The method for measuring the 3D cambered surface based on the two-dimensional laser image, according to claim 1, wherein in the second step, when the laser measuring device performs the calibration of the detection starting point, the laser measuring device moves from the planar position of the workpiece to the cambered surface position of the workpiece in a continuous laser calibration mode until the detection starting point is calibrated.
4. A subject matter according to claim 3, characterized in that the calibration distance of the continuous laser calibration is controlled between 0.5mm and 1 mm.
5. A subject matter according to claim 3 wherein after the laser measuring device performs calibration of the detection start point, the laser measuring device performs secondary verification on both sides of the X-axis direction of the detection start point with the detection start point as the start point, and obtains the Z-axis heights of the two detection points before and after the detection start point, and obtains the before-start calibration point and the after-start calibration point; and the rechecking work of the detection starting point is realized.
6. The subject matter of claim 5 wherein in the rechecking operation of the start point of the test, the distance of movement of the laser measuring device along the X-axis is less than the distance of movement during the test operation.
7. A subject matter according to claim 6, characterized in that the distance of movement of the laser measuring device is 0.1mm-0.05mm.
8. The subject matter of claim 5 wherein, during the rechecking of the inspection origin, if there is a difference between the pre-origin calibration point and the inspection origin, the laser measurement device calibrates the pre-origin calibration point to be a new inspection origin, and rechecks the inspection origin again until an accurate inspection origin is determined;
similarly, if the post-starting calibration point is the same as the detection starting point, the laser measurement device calibrates the post-starting calibration point to be a new detection starting point, and re-detection of the detection starting point is performed again until an accurate detection starting point is determined.
9. A theme according to claim 1, wherein in step three, the 3D detection method of the cambered surface may employ: and comparing the mode of importing the 3D drawing information with the information in the 3D point data set to realize a detection method of the cambered surface of the workpiece or constructing cambered surface image data according to the information in the 3D point data set, and directly judging one or two of the detection methods.
10. A device for detecting measurement of a 3D arc surface based on a two-dimensional laser image, for implementing a subject as set forth in any one of claims 1 to 9, comprising: a detection group and a display group;
wherein, the detection group includes: the detection platform and the laser detection module are arranged on the detection platform, and the detection platform is arranged on a group of X-axis moving modules;
the display group includes: the main control host is used for realizing data recording and calculation work and the display screen is used for realizing data display work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311331949.5A CN117629100A (en) | 2023-10-16 | 2023-10-16 | 3D cambered surface measuring method based on two-dimensional laser image and detecting equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311331949.5A CN117629100A (en) | 2023-10-16 | 2023-10-16 | 3D cambered surface measuring method based on two-dimensional laser image and detecting equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117629100A true CN117629100A (en) | 2024-03-01 |
Family
ID=90036636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311331949.5A Pending CN117629100A (en) | 2023-10-16 | 2023-10-16 | 3D cambered surface measuring method based on two-dimensional laser image and detecting equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117629100A (en) |
-
2023
- 2023-10-16 CN CN202311331949.5A patent/CN117629100A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10422619B2 (en) | Identification of geometric deviations of a motion guide in a coordinate-measuring machine or in a machine tool | |
| CN101526336B (en) | Calibration method of linear structured light three-dimensional visual sensor based on measuring blocks | |
| CN105157606B (en) | Contactless complicated optical surface profile high precision three-dimensional measurement method and measurement apparatus | |
| CN105081883B (en) | Machining center provided with on-machine detection device and using method of machining center | |
| CN102175182A (en) | Structured light three-dimensional measurement device and complete point cloud data acquisition method thereof | |
| CN207649542U (en) | A kind of multrirange large scale high-precision vision measuring mechanism | |
| CN112902880A (en) | Method and device for measuring parallelism of planar member | |
| CN112974141B (en) | Method for calibrating dispensing needle head and 3D sensor | |
| CN111735401A (en) | High-precision thickness measurement method and device for large-size object | |
| CN101685003A (en) | Measurement system and method for measuring deformation values in noncontact way | |
| CN111895921A (en) | Compensation model for improving measurement precision of system to height difference | |
| CN110017797B (en) | Dimension measurement result uncertainty evaluation method based on image isosurface segmentation method | |
| CN112945109B (en) | Laser displacement meter array system parameter calibration method based on horizontal displacement table | |
| CN110186397A (en) | A kind of guide rail parallelism measuring device and method | |
| CN117629100A (en) | 3D cambered surface measuring method based on two-dimensional laser image and detecting equipment thereof | |
| CN112050753B (en) | Method and device for measuring edge angle of longitudinal weld of pressure vessel | |
| CN116625271A (en) | Mobile phone middle frame non-contact z-direction detection method | |
| CN212109902U (en) | Probe card detection device | |
| CN112880586B (en) | Dynamic detection method and system for rail profile | |
| CN114862816A (en) | Glitch detection method, system, and computer-readable storage medium | |
| CN210268508U (en) | Advanced generation TFT glass A type frame detection device | |
| CN112184790A (en) | Object size high-precision measurement method based on depth camera | |
| CN111735402A (en) | Visual detection mechanism for porous cast aluminum workpiece | |
| CN220625209U (en) | Measuring device | |
| CN218847133U (en) | Two-dimensional and three-dimensional size measuring equipment for product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |