CN113280783A - Deformation detection method, system and device for automobile covering part and storage medium - Google Patents
Deformation detection method, system and device for automobile covering part and storage medium Download PDFInfo
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- 230000009286 beneficial effect Effects 0.000 description 4
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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Abstract
The application discloses a deformation detection method, a system and a device for an automobile covering part and a storage medium. The method comprises the steps of obtaining digital-analog data obtained by scanning a covering part by a scanner; intercepting a section line of the covering part according to the digital-analog data; establishing a rectangular coordinate system by taking the starting point of the section line as an origin coordinate, and enabling the end point of the section line to fall on an X axis of the rectangular coordinate system; according to a preset interval, sequentially taking a plurality of sampling points on a section line, and determining a line segment connecting any two sampling points; determining a normal section line segment of the covering part according to the line segment; the end points of the normal section line segments comprise a first sampling point and a second sampling point; determining the maximum value of the Y-axis distance of each point on the section line and the normal section line, and determining that the covering element is deformed when the maximum value exceeds a first preset threshold value. The deformation detection method for the automobile covering part has high detection accuracy, and can accurately and effectively detect the deformation problem of the automobile covering part. The method can be widely applied to the technical field of automobiles.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a deformation detection method, a system, a device and a storage medium for an automobile covering part.
Background
The automobile panel is a surface or an interior part of a space shape made of a metal sheet covering an engine and a chassis of an automobile and constituting a cab and a vehicle body. The function and the position can be divided into an external covering part, an internal covering part and a framework covering part. Automobile panels are important and relatively independent parts of automobile bodies, and need to meet certain structural performance requirements such as rigidity and strength besides certain functions. The problems that the closing force is increased, air and rain leak, cracks and falling of paint occur, the attractiveness of the whole automobile is reduced and the like are easily caused by insufficient rigidity or deformation of the covering part, so that whether the automobile covering part deforms or not and the deformation condition need to be analyzed in the related technology to determine the corresponding repairing strategy.
When the deformation condition of the automobile covering part is detected, the zebra-stripe lamp tube is often used for lighting, the deformation position and the deformation degree are confirmed through the distortion degree of stripes of the lamp light, or the deformation position and the deformation degree are confirmed through scratches of oilstones on the surface of the covering part. Most of the above methods rely on the sense of the detecting personnel to judge whether the covering part has deformation, so that the deformation degree cannot be well evaluated, and the deviation of the place with serious deformation is determined, which often influences the production and repair quality of the automobile. In view of the above, there is a need to solve the technical problems in the related art.
Disclosure of Invention
The present application aims to solve at least one of the technical problems in the related art to some extent.
Therefore, an object of the embodiments of the present application is to provide a deformation detection method for an automobile panel, which has high detection accuracy and can accurately and effectively detect the deformation problem of the automobile panel.
It is another object of embodiments of the present application to provide a deformation detection system for an automobile panel.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the application comprises the following steps:
in a first aspect, an embodiment of the present application provides a deformation detection method for an automobile panel, including the following steps:
acquiring digital-to-analog data obtained by scanning a covering part by a scanner;
intercepting a section line of the covering part according to the digital-analog data;
establishing a rectangular coordinate system by taking the starting point of the section line as an origin coordinate, and enabling the end point of the section line to fall on an X axis of the rectangular coordinate system;
according to a preset interval, sequentially taking a plurality of sampling points on the section line, and determining a line segment connecting any two sampling points;
determining a normal section line segment of the covering part according to the line segment; the end points of the normal section line segments comprise first sampling points and second sampling points, and the intervals between the first sampling points and the second sampling points are larger than preset intervals;
determining a maximum value of the Y-axis distance of each point on the section line and the normal section line segment, and determining that the covering element is deformed when the maximum value exceeds a first preset threshold value.
In addition, according to the deformation detection method of the automobile covering part of the above embodiment of the present application, the following additional technical features may be further provided:
further, in one embodiment of the present application, said determining a normal section line segment of said cover from said line segment comprises:
numbering the sampling points from the starting points of the section lines;
sequentially determining straight lines where the two sampling points are located according to the serial number sequence, and acquiring the number of intersection points of the straight lines and the section lines;
and when the number of the intersection points is two and the straight line is positioned at the outer side of the section line, determining the line segment between the two current sampling points as a normal section line segment.
Further, in one embodiment of the present application, the preset interval is equal to or less than 0.5 mm.
Further, in an embodiment of the present application, the method further includes the following steps:
determining the maximum value of the Y-axis distance on the section line and the normal section line segment as a third sampling point;
determining a first width distance between the first sampling point and a third sampling point, and determining a second width distance between the second sampling point and the third sampling point;
determining the smaller of the first width distance and the second width distance as a narrow side distance;
determining a ratio of the maximum value to the narrow side distance, and determining that there is deformation of the cover when the ratio exceeds a second preset threshold.
In a second aspect, an embodiment of the present application provides a deformation detection system for an automobile panel, including:
the acquisition module is used for acquiring digital-analog data obtained by scanning the covering part by the scanner;
the intercepting module is used for intercepting the section line of the covering element according to the digital-analog data;
the establishing module is used for establishing a rectangular coordinate system by taking the starting point of the section line as an origin coordinate and enabling the end point of the section line to fall on an X axis of the rectangular coordinate system;
the sampling module is used for sequentially taking a plurality of sampling points on the section line according to a preset interval and determining a line segment connecting any two sampling points;
a processing module for determining a normal section line segment of the covering element from the line segment; the end points of the normal section line segments comprise first sampling points and second sampling points, and the intervals between the first sampling points and the second sampling points are larger than preset intervals;
the first detection module is used for determining the maximum value of the Y-axis distance of each point on the section line and the normal section line, and when the maximum value exceeds a first preset threshold value, the covering element is determined to be deformed.
In addition, according to the deformation detection system of the automobile panel of the above-mentioned embodiment of the present application, the following additional technical features may also be provided:
further, in an embodiment of the present application, the processing module is specifically configured to:
numbering the sampling points from the starting points of the section lines;
sequentially determining straight lines where the two sampling points are located according to the serial number sequence, and acquiring the number of intersection points of the straight lines and the section lines;
and when the number of the intersection points is two and the straight line is positioned at the outer side of the section line, determining the line segment between the two current sampling points as a normal section line segment.
Further, in one embodiment of the present application, the preset interval is equal to or less than 0.5 mm.
Further, in one embodiment of the present application, the system further comprises:
the second processing module is used for determining a point of the maximum value of the Y-axis distance on the section line and the normal section line segment as a third sampling point; determining a first width distance between the first sampling point and a third sampling point, and determining a second width distance between the second sampling point and the third sampling point; determining the smaller of the first width distance and the second width distance as a narrow side distance; determining a ratio of the maximum value to the narrow side distance, and determining that there is deformation of the cover when the ratio exceeds a second preset threshold.
In a third aspect, an embodiment of the present application provides a deformation detection device for an automobile panel, including:
at least one processor;
at least one memory for storing at least one program;
the at least one program, when executed by the at least one processor, causes the at least one processor to implement the deformation detection method of an automobile panel according to the first aspect.
In a fourth aspect, the present application further provides a computer-readable storage medium, in which a processor-executable program is stored, and the processor-executable program is used for implementing the deformation detection method for an automobile panel according to the first aspect when the processor executes the program.
Advantages and benefits of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application:
according to the deformation detection method of the automobile covering part, digital-analog data obtained by scanning the covering part by a scanner are obtained; intercepting a section line of the covering part according to the digital-analog data; establishing a rectangular coordinate system by taking the starting point of the section line as an origin coordinate, and enabling the end point of the section line to fall on an X axis of the rectangular coordinate system; according to a preset interval, sequentially taking a plurality of sampling points on the section line, and determining a line segment connecting any two sampling points; determining a normal section line segment of the covering part according to the line segment; the end points of the normal section line segments comprise first sampling points and second sampling points, and the intervals between the first sampling points and the second sampling points are larger than preset intervals; determining a maximum value of the Y-axis distance of each point on the section line and the normal section line segment, and determining that the covering element is deformed when the maximum value exceeds a first preset threshold value. The deformation detection method for the automobile covering part has high detection accuracy, and can accurately and effectively detect the deformation problem of the automobile covering part.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present application or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating an exemplary embodiment of a method for detecting deformation of an automobile panel according to the present disclosure;
FIG. 2 is a cross-sectional view of a cross-sectional line in an embodiment of a method for detecting deformation of an automobile panel according to the present application;
FIG. 3 is a schematic diagram illustrating a method for detecting deformation of an automobile panel according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of an exemplary embodiment of a deformation detection system for an automobile panel according to the present disclosure;
fig. 5 is a schematic structural diagram of an embodiment of a deformation detection device for an automobile panel according to the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
The automobile panel is a surface or an interior part of a space shape made of a metal sheet covering an engine and a chassis of an automobile and constituting a cab and a vehicle body. The function and the position can be divided into an external covering part, an internal covering part and a framework covering part. Automobile panels are important and relatively independent parts of automobile bodies, and need to meet certain structural performance requirements such as rigidity and strength besides certain functions. The problems that the closing force is increased, air and rain leak, cracks and falling of paint occur, the attractiveness of the whole automobile is reduced and the like are easily caused by insufficient rigidity or deformation of the covering part, so that whether the automobile covering part deforms or not and the deformation condition need to be analyzed in the related technology to determine the corresponding repairing strategy.
When the deformation condition of the automobile covering part is detected, the zebra-stripe lamp tube is often used for lighting, the deformation position and the deformation degree are confirmed through the distortion degree of stripes of the lamp light, or the deformation position and the deformation degree are confirmed through scratches of oilstones on the surface of the covering part. Most of the above methods rely on the sense of the detecting personnel to judge whether the covering part has deformation, so that the deformation degree cannot be well evaluated, and the deviation of the place with serious deformation is determined, which often influences the production and repair quality of the automobile. Therefore, in the current deformation detection method for the automobile covering part, a detection method which has higher detection accuracy and can accurately and effectively detect the deformation problem of the covering part is lacked.
In view of this, an embodiment of the present application provides a method for detecting deformation of an automobile panel, where the method in the embodiment of the present application may be applied to a terminal, a server, or software running in the terminal or the server. The terminal may be, but is not limited to, a tablet computer, a notebook computer, a desktop computer, and the like. The server may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing basic cloud computing services such as cloud service, a cloud database, cloud computing, a cloud function, cloud storage, network service, cloud communication, middleware service, domain name service, security service, CDN, and a big data and artificial intelligence platform. Referring to fig. 1, the method mainly comprises the following steps:
in the embodiment of the application, an ATOS scanner can be adopted to scan the covering part to be detected, actual digital-analog data of the covering part are generated, the digital-analog data are aligned through the surface fitting (or the reference of the detection tool) of the ATOS, and the coordinate system where the digital-analog data of the covering part are located can be the coordinate system of the vehicle body. The function of the vehicle body coordinate system is that the intercepting position of the subsequent section line can be conveniently determined, specifically, the deformation position can be preliminarily determined through the distortion degree of the light stripes according to the illumination of the zebra stripe lamp in the related technology, so as to facilitate the subsequent detection.
in the embodiment of the application, the section line of the scanned digital-analog data can be intercepted by software of the scanner. Referring to fig. 2, in the embodiment of the present application, a rectangular coordinate system may be established for the obtained section line with the starting point as the origin coordinate, and then the section line may be adjusted so that the ending point falls on the X axis. Specifically, in some embodiments, as shown in fig. 2, the abscissa and ordinate of the end point Y1 may be calculated, the difference between the ordinates of points Y1 ' and Y1 after the end point Y1 falls on the X axis is then determined, and then for any other point, for example, point X1, the ratio of the abscissa of X1 to the abscissa of Y1 is calculated, multiplied by the ordinate of X1, which is the ordinate of the adjusted X1 shift position X1 ', and the abscissa of X1 ' is the same as X1. In some embodiments, it is also possible to translate the starting point of the section line to the original point and then drop the end point onto the X-axis by rotating the entire section line. It will be appreciated that in this embodiment, corresponding to the same angular rotation of all points on the section line, it is ensured that the shape of the section line does not change. It should be noted that, in the embodiment of the present application, in order to more intuitively display the position of the deformation, the Y-axis scale in the plane may also be enlarged, so as to be beneficial to obtaining an accurate analysis result, and a specific magnification factor may be flexibly adjusted as needed, for example, 5 times and 10 times are optional implementations.
in this step, for the adjusted section line, a plurality of sampling points may be obtained at a time thereon according to a preset interval, for example, in some embodiments, one point may be obtained every 0.3 mm. Of course, the preset interval may be flexibly adjusted according to the requirement, and is not fixed to a specific value, and may be any interval smaller than or equal to 0.5mm, for example. After a plurality of sampling points are determined, line segments connecting the sampling points can also be determined.
in the embodiment of the application, the normal section line segment of the covering part can be determined according to the line segment between each sampling point. The normal section line segment refers to a section state that the covering element should be in before deformation, generally, referring to fig. 3, in the embodiment of the present application, when determining the normal section line segment, the sampling points may be numbered from the starting point of the section line, for example, sampling point 1 and sampling point 2 … …, sample point n (n is a positive integer and is greater than or equal to 2), then according to the order of the numbers, the straight lines where the two sampling points are located are sequentially determined, and the number of intersection points of the straight lines and the section line is obtained; when the number of the intersection points is two, and the straight line is positioned outside the section line (namely the Y coordinate values of all the other points except the intersection point are larger than the Y coordinate value of the point on the section line with the same X coordinate), the current straight line is the common tangent of the section line, and the line segment between the current two sampling points can be determined as the normal section line segment. Specifically, if the sampling point 1 and the line segments of other sampling points are connected to the right, whether the line segments of the sampling point 1 and the other sampling points are normal section line segments is determined, and when the sampling point 1 does not meet the normal section line segments, the line segments are sequentially determined from the sampling point 2 to the right. And when the normal section line segment is determined, recording one end of the line segment as a first sampling point, and recording the other end of the line segment as a second sampling point. Here, it should be noted that, since it is detected whether the deformation of the covering member exists, and the deformation generally needs to be generated within a certain width range, a minimum distance may be preset, and when the distance between two sampling points is smaller than the preset interval, it is considered that the distance between the two sampling points is too short, and the deformation hardly occurs, and the distance may not be considered. Therefore, when the first sampling point and the second sampling point are determined, some situations that deformation is possible obviously do not exist can be eliminated, and the detection speed of the normal section line segment is accelerated.
And step 160, determining the maximum value of the Y-axis distance of each point on the section line and the normal section line, and determining that the covering element is deformed when the maximum value exceeds a first preset threshold value.
In the embodiment of the application, after the normal section line segment is determined, the maximum values of the Y-axis distances of the points on the section line and the normal section line segment can be sequentially determined, the maximum values represent deformation information of the deepest deformation position on the covering element, and whether the covering element is seriously deformed or not can be judged. Therefore, in the embodiment of the present application, a first preset threshold may be preset, and when the maximum value exceeds the first preset threshold, it is considered that the covering member is deformed, and the repairing work is required.
In some embodiments, the deformation condition may be quantitatively evaluated according to a ratio of the deformation depth to the deformation width, for example, according to a width distance between the first sampling point and the second sampling point, and then a ratio of the maximum value to the width distance is determined, a second preset threshold value may be preset for the ratio, and when the ratio exceeds the second preset threshold value, it is considered that the cover member is deformed, and the repair work is required.
In some embodiments, the deformation condition can be quantitatively evaluated according to the ratio of the deformation depth to the deformation narrow side width, where the narrow side width refers to the smaller of the width distances between the two end points of the normal section line segment and the deformation deepest point (i.e., the point of the maximum value of the Y-axis distance on the section line and the normal section line segment). Specifically, the deepest point of deformation is recorded as a third sampling point, a point of the maximum value of the Y-axis distance on the section line and the normal section line segment is determined as the third sampling point, then a first width distance between the first sampling point and the third sampling point and a second width distance between the second sampling point and the third sampling point are calculated, then the first width distance and the second width distance are compared, and the smaller of the first width distance and the second width distance is taken as the narrow-side distance. From this, the ratio of the maximum value to the width of the narrow side can be determined, for which a third predetermined threshold value can be predetermined, and when the ratio exceeds the third predetermined threshold value, it is assumed that the covering element is deformed and needs to be repaired.
A deformation detecting system for an automobile panel according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 4, a deformation detecting system for an automobile panel according to an embodiment of the present application includes:
the acquisition module 101 is configured to acquire digital-to-analog data obtained by scanning the cover with the scanner;
an intercepting module 102, configured to intercept a cross-section line of the cover according to the digital-analog data;
the establishing module 103 is configured to establish a rectangular coordinate system with the starting point of the section line as an origin coordinate, and enable the end point of the section line to fall on an X axis of the rectangular coordinate system;
the sampling module 104 is used for sequentially taking a plurality of sampling points on the section line according to a preset interval and determining a line segment connecting any two sampling points;
a processing module 105 for determining a normal section line segment of the covering from said line segment; the end points of the normal section line segments comprise first sampling points and second sampling points, and the intervals between the first sampling points and the second sampling points are larger than preset intervals;
a first detection module 106, configured to determine a maximum value of the Y-axis distances of the points on the section line and the normal section line, and determine that the covering element is deformed when the maximum value exceeds a first preset threshold.
Optionally, in an embodiment of the present application, the processing module is specifically configured to:
numbering the sampling points from the starting points of the section lines;
determining straight lines where the two sampling points are located in sequence according to the serial number sequence, and acquiring the number of intersection points of the line segments and the section lines;
and when the number of the intersection points is two and the straight line is positioned at the outer side of the section line, determining the line segment between the two current sampling points as a normal section line segment.
Optionally, in an embodiment of the present application, the preset interval is less than or equal to 0.5 mm.
Optionally, in an embodiment of the present application, the system further includes:
the second processing module is used for determining a point of the maximum value of the Y-axis distance on the section line and the normal section line segment as a third sampling point; determining a first width distance between the first sampling point and a third sampling point, and determining a second width distance between the second sampling point and the third sampling point; determining the smaller of the first width distance and the second width distance as a narrow side distance; determining a ratio of the maximum value to the narrow side distance, and determining that there is deformation of the cover when the ratio exceeds a second preset threshold.
It is to be understood that the contents in the foregoing method embodiments are all applicable to this system embodiment, the functions specifically implemented by this system embodiment are the same as those in the foregoing method embodiment, and the advantageous effects achieved by this system embodiment are also the same as those achieved by the foregoing method embodiment.
Referring to fig. 5, an embodiment of the present application provides a deformation detection device for an automobile panel, including:
at least one processor 201;
at least one memory 202 for storing at least one program;
the at least one program, when executed by the at least one processor 201, causes the at least one processor 201 to implement a method of detecting deformation of an automobile panel.
Similarly, the contents of the method embodiments are all applicable to the apparatus embodiments, the functions specifically implemented by the apparatus embodiments are the same as the method embodiments, and the beneficial effects achieved by the apparatus embodiments are also the same as the beneficial effects achieved by the method embodiments.
The embodiment of the present application also provides a computer-readable storage medium, in which a program executable by the processor 201 is stored, and the program executable by the processor 201 is used for executing the above deformation detection method for the automobile panel when being executed by the processor 201.
Similarly, the contents in the above method embodiments are all applicable to the computer-readable storage medium embodiments, the functions specifically implemented by the computer-readable storage medium embodiments are the same as those in the above method embodiments, and the beneficial effects achieved by the computer-readable storage medium embodiments are also the same as those achieved by the above method embodiments.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flowcharts of the present application are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present application is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the functions and/or features may be integrated in a single physical device and/or software module, or one or more functions and/or features may be implemented in separate physical devices or software modules. It will also be appreciated that a detailed discussion regarding the actual implementation of each module is not necessary for an understanding of the present application. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the present application as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the application, which is defined by the appended claims and their full scope of equivalents.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
While the present application has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A deformation detection method for an automobile panel is characterized by comprising the following steps:
acquiring digital-to-analog data obtained by scanning a covering part by a scanner;
intercepting a section line of the covering part according to the digital-analog data;
establishing a rectangular coordinate system by taking the starting point of the section line as an origin coordinate, and enabling the end point of the section line to fall on an X axis of the rectangular coordinate system;
according to a preset interval, sequentially taking a plurality of sampling points on the section line, and determining a line segment connecting any two sampling points;
determining a normal section line segment of the covering part according to the line segment; the end points of the normal section line segments comprise first sampling points and second sampling points, and the intervals between the first sampling points and the second sampling points are larger than preset intervals;
determining a maximum value of the Y-axis distance of each point on the section line and the normal section line segment, and determining that the covering element is deformed when the maximum value exceeds a first preset threshold value.
2. The method for detecting deformation of an automobile panel according to claim 1, wherein said determining a normal section line segment of the panel from the line segment includes:
numbering the sampling points from the starting points of the section lines;
sequentially determining straight lines where the two sampling points are located according to the serial number sequence, and acquiring the number of intersection points of the straight lines and the section lines;
and when the number of the intersection points is two and the straight line is positioned at the outer side of the section line, determining the line segment between the two current sampling points as a normal section line segment.
3. The deformation detecting method of an automobile panel according to claim 1, characterized in that: the preset interval is less than or equal to 0.5 mm.
4. The deformation detecting method of an automobile panel according to any one of claims 1 to 3, characterized by further comprising the steps of:
determining the maximum value of the Y-axis distance on the section line and the normal section line segment as a third sampling point;
determining a first width distance between the first sampling point and a third sampling point, and determining a second width distance between the second sampling point and the third sampling point;
determining the smaller of the first width distance and the second width distance as a narrow side distance;
determining a ratio of the maximum value to the narrow side distance, and determining that there is deformation of the cover when the ratio exceeds a second preset threshold.
5. A deformation detection system for an automobile panel, comprising:
the acquisition module is used for acquiring digital-analog data obtained by scanning the covering part by the scanner;
the intercepting module is used for intercepting the section line of the covering element according to the digital-analog data;
the establishing module is used for establishing a rectangular coordinate system by taking the starting point of the section line as an origin coordinate and enabling the end point of the section line to fall on an X axis of the rectangular coordinate system;
the sampling module is used for sequentially taking a plurality of sampling points on the section line according to a preset interval and determining a line segment connecting any two sampling points;
a processing module for determining a normal section line segment of the covering element from the line segment; the end points of the normal section line segments comprise first sampling points and second sampling points, and the intervals between the first sampling points and the second sampling points are larger than preset intervals;
the first detection module is used for determining the maximum value of the Y-axis distance of each point on the section line and the normal section line, and when the maximum value exceeds a first preset threshold value, the covering element is determined to be deformed.
6. The system according to claim 5, wherein the processing module is configured to:
numbering the sampling points from the starting points of the section lines;
sequentially determining straight lines where the two sampling points are located according to the serial number sequence, and acquiring the number of intersection points of the straight lines and the section lines;
and when the number of the intersection points is two and the straight line is positioned at the outer side of the section line, determining the line segment between the two current sampling points as a normal section line segment.
7. The system for detecting deformation of an automobile panel according to claim 5, wherein the preset interval is 0.5mm or less.
8. The system for detecting deformation of an automobile panel according to any one of claims 5 to 7, further comprising:
the second processing module is used for determining a point of the maximum value of the Y-axis distance on the section line and the normal section line segment as a third sampling point; determining a first width distance between the first sampling point and a third sampling point, and determining a second width distance between the second sampling point and the third sampling point; determining the smaller of the first width distance and the second width distance as a narrow side distance; determining a ratio of the maximum value to the narrow side distance, and determining that there is deformation of the cover when the ratio exceeds a second preset threshold.
9. A deformation detecting device for an automobile panel, comprising:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is caused to implement the deformation detecting method of an automobile panel according to any one of claims 1 to 4.
10. A computer-readable storage medium in which a program executable by a processor is stored, characterized in that: the processor-executable program, when executed by the processor, is for implementing the deformation detection method of the automobile panel according to any one of claims 1 to 4.
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