CN211060854U - Automobile morphology visual detection system based on unchanged angle similarity - Google Patents
Automobile morphology visual detection system based on unchanged angle similarity Download PDFInfo
- Publication number
- CN211060854U CN211060854U CN201922503610.4U CN201922503610U CN211060854U CN 211060854 U CN211060854 U CN 211060854U CN 201922503610 U CN201922503610 U CN 201922503610U CN 211060854 U CN211060854 U CN 211060854U
- Authority
- CN
- China
- Prior art keywords
- camera
- dimensional reference
- reference plate
- connecting piece
- line laser
- 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.)
- Active
Links
Images
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses a car appearance visual detection system based on angle is similar unchangeable aims at solving the car appearance initiative visual detection problem based on angle is similar unchangeable. The active vision reconstruction system for the automobile morphology based on the similarity and invariance of angles mainly comprises a camera support (1), a camera (2), a connecting piece (3), a line laser (4) and a two-dimensional reference plate (5). Regular geometric figures of intersecting linear families and parallel linear families capable of generating angle characteristics are adhered to the surface of the two-dimensional reference plate (5), the camera support (1) is placed on the ground, the camera (2) is fixedly connected with a bolt thread at the top of the camera support (1) through a threaded hole at the bottom, and the two-dimensional reference plate (5) is placed in a long and thin groove of a U-shaped steel plate of the connecting piece (3), so that the automobile morphology visual detection system based on angle similarity invariance is simple in structure and reliable in performance.
Description
Technical Field
The utility model relates to a measuring equipment in car appearance detection area, more specifically the utility model relates to a car appearance visual detection system based on angle is similar unchangeable.
Background
In recent years, machine vision has gradually become a key technology to improve the efficiency and accuracy of automobile inspection. The automobile appearance detection is one of important research contents for detecting the passing ability and the driving safety of the automobile. The automobile morphology detection based on machine vision can realize automatic identification of whether the automobile is overrun and overloaded, and provides very important basis for classification of automobile types, acquisition and reconstruction of whole automobile size parameters and automobile information. Therefore, the research on the automobile appearance visual detection system based on the unchanged angle similarity has important research significance for enriching the automobile performance detection method, guaranteeing the life and property safety of people and realizing the automatic detection of the automobile through the non-contact measurement method. The utility model discloses a non-contact, measuring speed is fast, be fit for measuring the detection method of no strict constraint of large-scale object, has constructed space conversion characteristic parallel lines and perpendicular line to utilize the unchangeable characteristic of similar space angle to construct the angle invariant that contains laser projection point information, realized adopting the short-term test of simple and convenient model to the car appearance.
Disclosure of Invention
The utility model discloses to solving and obtaining the car appearance in-process, need a non-contact, measuring speed is fast, be fit for measuring the current situation that the detection method that does not have the strict constraint of large-scale object resumes the car appearance, provide a method and system that the performance is reliable, simple structure, easy and simple to handle, algorithm are simple. The method mainly comprises a camera bracket, a camera, a connecting piece, a line laser and a two-dimensional reference plate, and firstly, a transformation matrix from a projection space to a similar space is solved by utilizing a plurality of pairs of parallel straight lines and orthogonal straight lines on a reference pattern; then utilizing the angle similarity invariant formed by the laser projection point and the known line segment on the two-dimensional reference plate; and finally, converting the laser projection points in the similar space into an Euclidean space according to the sine theorem of the triangle, thereby realizing the visual detection of the appearance of the automobile based on the unchanged angle.
With the attached drawings of the specification, the utility model adopts the following technical scheme to realize:
the visual detection system for the automobile morphology based on the unchanged angle similarity comprises a camera bracket, a camera, a connecting piece, a line laser and a two-dimensional reference plate;
the camera support is placed on the ground, a camera is fixedly connected with a bolt thread at the top of the camera support through a threaded hole at the bottom, a two-dimensional reference plate is placed in a long and thin groove of a U-shaped steel plate of a connecting piece, a bolt penetrates through a through hole of the connecting piece and the two-dimensional reference plate and is fixedly connected with a nut thread, a line laser is inserted into an inner hole of a laser connecting piece steel pipe, a set screw is screwed into a threaded hole in the side face of the connecting piece steel pipe, the end part of the set screw is in contact and tight fit with the cylindrical surface of the line laser, and a laser line emitted by the line;
the camera support in the technical scheme is a triangular support with adjustable height;
the camera in the technical scheme is a wide-angle industrial camera provided with a narrow-band filter;
the connecting piece in the technical scheme is a part formed by welding a U-shaped steel plate and a steel pipe, a through hole is processed on the side surface of the U-shaped steel plate, and a threaded hole is processed on the side surface of the steel pipe;
the line laser in the technical scheme is a cylindrical part capable of emitting line laser, and the laser wavelength emitted by the line laser is consistent with the band-pass wavelength of a narrow-band filter of a camera;
the two-dimensional reference plate in the technical scheme is a part made of a rectangular steel plate, regular geometric figures of intersecting linear families and parallel linear families capable of generating angle characteristics are adhered to the surface of the two-dimensional reference plate, and a through hole is machined in the two-dimensional reference plate.
The utility model has the advantages that:
(1) the utility model discloses a method adopts the image of parallel lines and perpendicular line to obtain the transformation matrix of Euclidean space to similar space, adopts known point and laser projection point to construct the similar invariant of angle, utilizes the sine theorem to construct automobile body point and rebuilds the solution equation, adopts the point with the coordinate axis coincidence to realize the linearization of quadratic equation, avoids knowing complicated nonlinear equation group, has realized the reconstruction of automobile body point.
(2) The utility model discloses a only need the camera to acquire an image that contains two-dimentional reference plate 5 and laser instrument 4 and the crossing projection laser spot in vehicle surface, can be at the true coordinate of solving 5 coordinate systems of two-dimentional reference plate of automobile body characteristic point, and then can solve the euclidean coordinate of automobile body characteristic point.
(3) The utility model discloses a camera 2 that the system adopted is wide for the wide angle industry camera that is equipped with the narrowband optical filter, and acquireable field of vision scope is wider for the laser wavelength that line laser 4 adopted sent is unanimous with the band-pass wavelength of the narrowband optical filter of camera 2, can effectively reduce the interference of ambient light source to measurement process, has improved measurement accuracy greatly. And threaded holes are processed on the upper, lower, left and right sides of the steel pipe of the connecting piece 3 for adjusting and fixing the position of the line laser 4, so that laser lines projected by the line laser 4 are coplanar with the two-dimensional reference plate 5.
Drawings
FIG. 1 is an isometric view of an automobile topography vision inspection system based on invariant angle similarity;
FIG. 2 is an isometric view of a camera mount 1 in an automobile topography vision inspection system based on invariant angle similarity;
FIG. 3 is an isometric view of a camera 2 in an angular similarity invariant based visual inspection system for vehicle topography;
fig. 4 is an isometric view of a connector 3 in an automobile topography vision inspection system based on angle similarity;
FIG. 5 is an isometric view of a two-dimensional reference plate 5 in an angular similarity invariant based automotive topography vision inspection system;
FIG. 6 is an isometric view of a connector 3, a line laser 4 and a two-dimensional reference plate 5 in an automobile topography vision detection system based on angle similarity;
in the figure: 1. the device comprises a camera support, 2. a camera, 3. a connecting piece, 4. a line laser and 5. a two-dimensional reference plate.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 to 6, the visual inspection system for the automobile morphology based on the similarity and invariance of angles includes a camera support 1, a camera 2, a connecting piece 3, a line laser 4 and a two-dimensional reference plate 5.
The camera support 1 is a triangle support with adjustable height, the camera support 1 is placed on the ground, the camera 2 is a wide-angle industrial camera provided with a narrow-band filter, the camera 2 is fixedly connected with a bolt thread at the top of the camera support 1 through a threaded hole at the bottom, the two-dimensional reference plate 5 is a part made of a rectangular steel plate, regular geometric figures of intersecting linear families and parallel linear families capable of generating angle characteristics are adhered on the surface of the two-dimensional reference plate 5, a through hole is processed on the two-dimensional reference plate 5, the connecting piece 3 is a part formed by welding a U-shaped steel plate and a steel pipe, a through hole is processed on the side surface of the U-shaped steel plate, a threaded hole is processed on the side surface of the steel pipe, the two-dimensional reference plate 5 is placed in a long and thin groove of the U-shaped steel plate of the connecting piece 3, a bolt penetrates through the through hole, set screw in connecting piece 3 steel pipe side's screw hole, set screw tip and 4 face of cylinder contact tight fits of line laser, and line laser 4 is the cylindrical part that can emit line laser, and the band-pass wavelength of the laser wavelength that line laser 4 sent is unanimous with the narrowband filter of camera 2, and the laser line that line laser 4 sent is coplanar with 5 figure planes of two-dimensional reference plate.
Claims (1)
1. An automobile appearance visual detection system based on unchanged angle similarity comprises a camera support (1), a camera (2), a connecting piece (3), a line laser (4) and a two-dimensional reference plate (5);
the camera support (1) is placed on the ground, a camera (2) is fixedly connected with a bolt thread at the top of the camera support (1) through a threaded hole at the bottom, a two-dimensional reference plate (5) is placed in a long and thin groove of a U-shaped steel plate of a connecting piece (3), a bolt penetrates through holes of the connecting piece (3) and the two-dimensional reference plate (5) and is fixedly connected with a nut thread, a line laser (4) is inserted into an inner hole of a steel pipe of the laser connecting piece (3), a set screw is screwed into the threaded hole in the side face of the steel pipe of the connecting piece (3), the end part of the set screw is in contact tight fit with the cylindrical surface of the line laser (4), and a laser line emitted by the line laser (4) is coplanar;
the camera support (1) is a triangular support with adjustable height;
the camera (2) is a wide-angle industrial camera provided with a narrow-band optical filter;
the connecting piece (3) is a part formed by welding a U-shaped steel plate and a steel pipe, a through hole is processed on the side surface of the U-shaped steel plate, and a threaded hole is processed on the side surface of the steel pipe;
the line laser (4) is a cylindrical part capable of emitting line laser, and the laser wavelength emitted by the line laser (4) is consistent with the band-pass wavelength of the narrow-band filter of the camera (2);
the two-dimensional reference plate (5) is a part made of a rectangular steel plate, a through hole is processed in the two-dimensional reference plate (5), and the two-dimensional reference plate is characterized in that regular geometric figures of intersecting linear families and parallel linear families capable of generating angle characteristics are pasted on the surface of the two-dimensional reference plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922503610.4U CN211060854U (en) | 2019-12-31 | 2019-12-31 | Automobile morphology visual detection system based on unchanged angle similarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922503610.4U CN211060854U (en) | 2019-12-31 | 2019-12-31 | Automobile morphology visual detection system based on unchanged angle similarity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211060854U true CN211060854U (en) | 2020-07-21 |
Family
ID=71595229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922503610.4U Active CN211060854U (en) | 2019-12-31 | 2019-12-31 | Automobile morphology visual detection system based on unchanged angle similarity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211060854U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082528A (en) * | 2020-09-21 | 2020-12-15 | 四川大学 | Model test terrain measuring device and method |
-
2019
- 2019-12-31 CN CN201922503610.4U patent/CN211060854U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082528A (en) * | 2020-09-21 | 2020-12-15 | 四川大学 | Model test terrain measuring device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211060854U (en) | Automobile morphology visual detection system based on unchanged angle similarity | |
| CN110672040A (en) | High-precision rotation angle measuring method based on vision | |
| CN101978240A (en) | Probe for a chassis-measuring system, chassis-measuring system and method for determining the position parameters of probes of a chassis-measuring system | |
| CN111174698A (en) | Automobile detection non-common-view-field camera global calibration system and method based on surface light field | |
| CN102937417A (en) | Device for detecting damage depth of object surface scratch | |
| CN104596412A (en) | Identification base for complex curved surface high-precision measuring and positioning | |
| CN111412856A (en) | Automobile morphology monocular active vision reconstruction system and method based on double-rectangle identification | |
| CN109773686A (en) | A kind of dot laser line scaling method and system for robotic asssembly | |
| CN211626384U (en) | Automobile detection non-common-view-field camera global calibration system based on surface light field | |
| CN202947693U (en) | Device for detecting depth of surface scratch damage of object | |
| CN104089579A (en) | Camera calibration target of automobile visual inspection system based on spherical coordinates | |
| CN109540042B (en) | Automobile morphology active vision detection system and method based on unconstrained light plane | |
| CN205373648U (en) | Contact net geometric parameters dynamic verification device based on triangulation | |
| CN111412854A (en) | Point and circle invariant based active vision reconstruction system and method for automobile morphology | |
| CN209399945U (en) | Based on without constraint homocentric beam race automobile pattern Active visual inspection system | |
| CN211060861U (en) | Automobile morphology active vision reconstruction system based on point and straight line invariant | |
| CN211060859U (en) | Automobile morphology reconstruction system based on triangular array affine invariant | |
| CN111412858A (en) | Automobile morphology visual detection system and method based on unchanged angle similarity | |
| CN113155060A (en) | Object surface flatness detection method and detection equipment thereof | |
| CN211060860U (en) | Automobile morphology reconstruction system based on duality quadratic curve with virtual round dots | |
| CN211060856U (en) | Automobile morphology active vision reconstruction system based on straight line and circle invariants | |
| CN2914032Y (en) | Optics non-contact type three-dimensional shaped measuring instrument | |
| CN211042116U (en) | Automobile morphology active vision reconstruction system based on point and circle invariants | |
| CN211626404U (en) | Shaft end grounding monocular reconstruction system of concentric quadratic curve polar line geometry | |
| CN211060858U (en) | Automobile morphology monocular active vision reconstruction system based on double-rectangular identification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |