CN110715933A - Optical layout structure for online image acquisition of train wheel set tread - Google Patents
Optical layout structure for online image acquisition of train wheel set tread Download PDFInfo
- Publication number
- CN110715933A CN110715933A CN201911096007.7A CN201911096007A CN110715933A CN 110715933 A CN110715933 A CN 110715933A CN 201911096007 A CN201911096007 A CN 201911096007A CN 110715933 A CN110715933 A CN 110715933A
- Authority
- CN
- China
- Prior art keywords
- tread
- wheel set
- camera
- image acquisition
- wheel
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/12—Measuring or surveying wheel-rims
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30248—Vehicle exterior or interior
- G06T2207/30252—Vehicle exterior; Vicinity of vehicle
Landscapes
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Quality & Reliability (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses an optical layout structure for online image acquisition of a train wheel set tread, which comprises a track for a wheel set to pass through, a light supplement lamp for irradiating the wheel set tread and a camera for performing image acquisition on the wheel set tread, wherein the light supplement lamp is inclined to a wheel set rotation plane to irradiate the wheel set tread, and the center direction of a view field of the camera is vertical to the length direction of the track. The invention has simple and compact structure, effectively avoids strong reflection, has good light supplementing uniformity and more uniform image brightness, completely eliminates the shielding interference of parts such as brake shoes, sand sprinkling pipes and the like, realizes the shooting without shielding dead angles, light supplementing dead angles and overexposure bright spots in the shooting field range of a designed camera, has good visual effect, has obvious wheel set tread conditions and defect characteristics, achieves the aims of no dead angle full coverage and image acquisition quality improvement, and improves the accuracy of tread defect detection.
Description
Technical Field
The invention relates to the technical field of train wheel set detection, in particular to an optical layout structure for on-line image acquisition of train wheel set tread.
Background
The wheel set is one of important parts of a train running gear, and the running safety of the train is directly influenced if the wheel set runs normally. The defects of scratch, local depression and the like of the wheel set tread are important factors influencing the running safety, the stability and the application economy of the train. The method has the characteristics of safety, high adaptable speed, high precision and the like, but tread defects often show different states in acquired images due to different shooting modes, the optical layout of an image acquisition system is very important for ensuring the subsequent defect identification accuracy, the quality of the shot images is directly determined, the difficulty of a subsequent algorithm is greatly reduced when the quality of the images is higher, and the detection accuracy is also improved.
The existing optical layout structure adopts a mode that a camera and a light supplement lamp are arranged at the same point, the camera and the light supplement lamp are positioned at the outer side of the circumference of a wheel set, as shown in figure 1, the center of a camera view field is over against the center of reflected light generated by the light supplement lamp irradiating a tread surface, reflected light of the tread surface in other areas of the camera view field can not directly enter the camera, and the reflected light completely depends on diffused light of the tread surface, so that a shot image is in a state of high middle brightness and dark side, strong reflected light is easy to generate, the image quality is not beneficial to detection, the effective detection area is small, and a large number of cameras need to be arranged for achieving 360-degree detection, and the cost is; still adopt the optical layout structure of camera and light filling area, as shown in fig. 2, camera and light filling area distribute in the wheel set tread circumferencial direction different positions, for former mode, the wheel set tread of camera visual field center below also is effectively lighted, has more light to enter into the camera, and the effective area of shining of image increases, but the wheel set tread of camera visual field center top still is difficult to have the effect by the light filling area and lights up, has the condition of dark partially, and the image quality of gathering is relatively poor. The existing optical layout structure has the problems of strong light reflection, uneven light supplement, blocking of brake shoes and sand sprinkling pipes and the like, so that the image quality is poor, and the accuracy of tread defect detection is influenced.
Disclosure of Invention
The invention aims to solve the technical problems and provide a technical task for improving the prior art, provides an optical layout structure for on-line image acquisition of a train wheel set tread, and solves the problems that the optical layout structure for image acquisition of the wheel set tread in the prior art has strong light reflection, brake shoes and a sand sprinkling pipe, the image acquisition quality is influenced, and the tread defect detection accuracy is reduced.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the utility model provides an optical layout structure of train wheel pair tread on-line image acquisition, includes the track that supplies the wheel pair to pass, is used for shining the light filling lamp of wheel pair tread and is used for carrying out image acquisition's camera to the wheel pair tread, the light filling lamp incline to wheel pair rotation plane and shine the wheel pair tread, the visual field center direction perpendicular to track length direction of camera. The optical layout structure for on-line image acquisition of the train wheel set tread adopts the mode that the light supplement lamp is inclined to the wheel set rotating plane to irradiate and irradiate the wheel set tread, so that strong light reflection is effectively avoided, meanwhile, the wheel set tread is subjected to image acquisition in the mode that the view field center direction of the camera is perpendicular to the length direction of the rail, namely, the camera acquires the image of the wheel set tread from the side direction of the rail, so that the uniform and clear image of the wheel set tread can be shot, more reflected light enters the camera, the image is more uniform in brightness and darkness, the shielding interference of parts such as brake shoes, sand sprinkling pipes and the like is completely eliminated, the quality of image acquisition is improved, and the accuracy of tread defect.
Furthermore, still including being used for the wheel that will be shone by the light filling lamp to the reflector of tread reflection to the camera, utilize the reflector can effectively enlarge the field of view scope to be convenient for the nimble settlement of camera position.
Furthermore, the view field center direction of the camera is parallel to the rotating shaft direction of the wheel set, so that the installation is convenient, and the structural stability is good.
Further, the light filling lamp be along track length direction's bar light, make the light filling at track length direction more even for the image light and shade that the shooting obtained is even, improves image quality.
Furthermore, the view field center direction of the camera is opposite to the wheel set tread, namely, the image acquired by the camera is an orthographic image of the wheel set tread, so that the defects of scratches, pits and the like on the tread can be more clearly and accurately shot, the image acquisition quality is improved, and the tread defect detection accuracy is improved.
Further, the light supplement lamp and the camera are arranged below the wheel set, namely the light supplement lamp supplements light to the tread from the wheel set below, and the camera collects images of the tread from the wheel set below.
Furthermore, the camera continuously shoots when the wheel pair passes through a coverage area of the light supplement lamp, the wheel pair tread is of a circumferential structure, the relative position of the wheel pair tread in contact with the rail is fixed, only a small part of the wheel pair tread is illuminated by the light supplement at a certain moment when the wheel pair passes through the coverage area of the light supplement lamp, so that an image acquired by single shooting of the camera only covers a small part of the circumference of the wheel pair tread, the whole view field of the camera along the length direction of the rail is effectively utilized in a continuous shooting mode, more areas of the circumference of the wheel pair tread are shot, and a plurality of cameras are arranged side by side along the length direction of the rail to cover the whole circumference of the wheel pair tread.
Furthermore, the track comprises a bearing rail for bearing the wheel set and a guard rail parallel to the bearing rail and used for limiting the transverse position of the wheel set, so that the wheel set can accurately advance along the track, and the accuracy of image acquisition is improved.
Furthermore, the camera is an area array camera, two-position image information is accurately acquired, and the measured image is more visual and accurate.
Furthermore, the field of view of the cameras along the length direction of the track at least covers 1/8 of the wheel set tread circumference, and only a small number of cameras are needed to cover the whole circumference of the wheel set tread.
Compared with the prior art, the invention has the advantages that:
the optical layout structure for on-line image acquisition of the train wheel set tread has a simple and compact structure, effectively avoids strong reflection, has good light supplementing uniformity and more uniform image brightness, completely eliminates the shielding interference of parts such as brake shoes, sand sprinkling pipes and the like, realizes the purposes of no shielding dead angle, no light supplementing dead angle and no over-exposure bright spot shooting in the shooting field range of a designed camera, has good visual effect, has remarkable wheel set tread condition and defect characteristics, achieves the purposes of no dead angle full coverage and image acquisition quality improvement, and improves the accuracy of tread defect detection.
Drawings
FIG. 1 is a schematic diagram of a first conventional optical layout;
FIG. 2 is a schematic diagram of a second conventional optical layout;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic view of an image acquisition of a wheel set tread marked with an artificial defect;
fig. 5 is a schematic diagram of the image acquisition of the actual wheel set tread.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The optical layout structure for on-line image acquisition of the train wheel set tread disclosed by the embodiment of the invention has the advantages of simple structure, good light supplementing uniformity, capability of avoiding the strong light reflection condition, effective improvement of image acquisition quality, remarkable tread condition and defect characteristics and improvement of the accuracy of tread defect detection.
As shown in fig. 3, an optical layout structure for on-line image acquisition of a train wheel set tread is arranged on a warehousing line of a train (including a motor train, a locomotive, a passenger train, a truck, a subway, a tramcar and the like), and mainly comprises a track for passing a wheel set, a light supplement lamp 3 for irradiating the wheel set tread and a camera 4 for performing image acquisition on the wheel set tread, wherein the track is formed by transforming a steel rail of a warehousing line, and comprises a bearing rail 1 for bearing the wheel set and a guard rail 2 parallel to the bearing rail 1 for limiting the transverse position of the wheel set, so that the wheel set accurately travels along the track, and the accuracy of image acquisition is improved;
the light supplement lamp 3 and the camera 4 are arranged beside the track and below the wheel pair, namely, the wheel pair is subjected to light supplement shooting from the lower part of the wheel pair to the tread, the light supplement lamp 3 is arranged on a base of the track, and the light supplement lamp 3 is inclined to the rotating plane of the wheel pair to irradiate and irradiate the tread of the wheel pair, so that strong light reflection is effectively avoided;
the camera 4 adopts a planar array camera, in the embodiment, a reflector 5 used for reflecting the wheel set tread irradiated by the light supplement lamp 3 to the camera 4 is further arranged, the reflector 5 is located below the wheel set, the viewing field center direction of the camera 4 is perpendicular to the length direction of the rail, the viewing field center direction of the camera 4 is parallel to the rotating shaft direction of the wheel set, the camera collects images of the wheel set tread from the side direction of the rail below the wheel set, when the reflector 5 reflects the wheel set tread to the camera 4, the viewing field center direction of the camera 4 is opposite to a wheel set tread mirror image in the reflector 5, and therefore the images collected by the camera 4 are front view images of the wheel set tread, the definition and accuracy of image collection are guaranteed, the wheel set tread condition and the defect characteristics are obvious, and the accuracy of tread defect detection is improved.
In order to improve the light supplement uniformity, the light supplement lamp 3 is a strip light along the length direction of the track, so that the light and shade of the shot image in the length direction of the track are uniform.
The relative position of the wheel set tread in contact with the track is fixed, the image acquired by a single shooting of the camera only covers a small part of the circumference of the wheel set tread, in order to realize the full coverage of the whole circumference of the wheel set tread, the camera 4 continuously shoots when the wheel set passes through the coverage area of the light supplement lamp 3, in the embodiment, 3 times of shooting are adopted to effectively utilize the whole view field of the camera 4 along the length direction of the track, so that a single camera can shoot more areas of the circumference of the wheel set tread; the field of view of the cameras 4 along the length direction of the track at least covers 1/8 of the wheel set tread circumference, so that only 8 cameras are needed to be arranged side by side along the length direction of the track to cover the whole circumference of the wheel set tread.
As shown in fig. 4, it can be seen that artificial defects of various marks are clearly displayed in an image, meanwhile, light supplement is uniform for the whole tread, and a situation of local strong reflection does not occur, and the whole field of view of the camera 4 along the length direction of the rail can be effectively utilized by 3 times of shooting, so that a single camera 4 can cover more areas of the circumference of the wheel set tread; fig. 5 shows an image of the tread of an actual wheel set, the image effect is clearer, the contrast between the defect on the tread and the periphery is clearer, and the strong light reflection area is extremely small, so that the subsequent detection is facilitated.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The utility model provides an optical layout structure of online image acquisition of train wheel pair tread, its characterized in that, including supplying the current track of wheel pair, be used for shining light filling lamp (3) of wheel pair tread and be used for carrying out image acquisition's camera (4) to the wheel pair tread, light filling lamp (3), camera (4) set up by the track, light filling lamp (3) incline to wheel pair rotation plane and shine the wheel pair tread, the visual field center direction perpendicular to track length direction of camera (4).
2. The optical layout structure for on-line image acquisition of train wheelset treads according to claim 1, characterized by further comprising a reflector (5) for reflecting the wheelset treads irradiated by the fill-in light (3) to the camera (4).
3. The optical arrangement structure for on-line image acquisition of train wheel set tread according to claim 2, wherein the center direction of the field of view of the camera (4) is parallel to the direction of the rotating shaft of the wheel set.
4. The optical layout structure for on-line image acquisition of the train wheel-to-tread according to claim 1, wherein the light supplement lamp (3) is a strip light along the length direction of the rail.
5. The optical layout structure for on-line image acquisition of train wheelset tread according to claim 1, characterized in that the center direction of the field of view of the camera (4) is opposite to the wheelset tread.
6. The optical layout structure for on-line image acquisition of the wheel set treads of the trains according to any one of claims 1 to 5, characterized in that the light supplement lamp (3) and the camera (4) are arranged below the wheel sets.
7. The optical layout structure for on-line image acquisition of the wheel set treads of the trains as claimed in any one of claims 1 to 5, characterized in that the cameras (4) take continuous shots when the wheel sets pass through the coverage area of the light supplement lamp (3).
8. The optical layout structure for the online image acquisition of the wheel set tread of the train as claimed in any one of claims 1 to 5, wherein the track comprises a bearing rail (1) for bearing the wheel set and a guard rail (2) parallel to the bearing rail (1) for limiting the transverse position of the wheel set.
9. The optical arrangement structure for on-line image acquisition of train wheel-to-tread according to any one of claims 1 to 5, wherein the camera is an area-array camera.
10. The optical arrangement structure for on-line image acquisition of train wheel set tread according to any one of claims 1 to 5, characterized in that the field of view of the camera (4) along the length direction of the track at least covers 1/8 of the wheel set tread circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096007.7A CN110715933A (en) | 2019-11-11 | 2019-11-11 | Optical layout structure for online image acquisition of train wheel set tread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911096007.7A CN110715933A (en) | 2019-11-11 | 2019-11-11 | Optical layout structure for online image acquisition of train wheel set tread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110715933A true CN110715933A (en) | 2020-01-21 |
Family
ID=69215871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911096007.7A Pending CN110715933A (en) | 2019-11-11 | 2019-11-11 | Optical layout structure for online image acquisition of train wheel set tread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110715933A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541851A (en) * | 2020-05-12 | 2020-08-14 | 南京甄视智能科技有限公司 | Face recognition equipment accurate installation method based on unmanned aerial vehicle hovering survey |
-
2019
- 2019-11-11 CN CN201911096007.7A patent/CN110715933A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541851A (en) * | 2020-05-12 | 2020-08-14 | 南京甄视智能科技有限公司 | Face recognition equipment accurate installation method based on unmanned aerial vehicle hovering survey |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10605697B2 (en) | Tyre condition analysis | |
| CN100449264C (en) | On-line detection method and device for thread defect of vehicle wheel set | |
| CN110146507B (en) | System and method for detecting appearance defects of automobile paint surface | |
| US10859468B2 (en) | Method and device for tyre condition analysis | |
| US11912320B2 (en) | Systems and methods for visualizing and analyzing a rail surface | |
| CN104870934B (en) | Device and method for measuring the tread depth of tire | |
| CN103917429B (en) | Vehicle part is monitored | |
| US20060274930A1 (en) | Vision system and a method for scanning a traveling surface to detect surface defects thereof | |
| CN110715933A (en) | Optical layout structure for online image acquisition of train wheel set tread | |
| CN112797918B (en) | Three-dimensional size detection device for elevator traction sheave groove | |
| JP3271549B2 (en) | Surface inspection equipment | |
| CN210953851U (en) | Optical layout structure for online image acquisition of train wheel set tread | |
| CN108709497A (en) | A kind of contact net geometric parameter detection device | |
| CN208887650U (en) | A kind of rail polling car mileage counting device | |
| CN109470262A (en) | A kind of rail polling car mileage method of counting | |
| JP4424294B2 (en) | Trolley wire position measuring device | |
| JP6850369B2 (en) | How to install the vehicle underfloor parts imaging system and the vehicle underfloor parts imaging system | |
| CN109447959A (en) | Tire static load mark measurement method | |
| CN114909990B (en) | Vehicle-mounted non-contact line abrasion measuring method, device and system | |
| CN105092214A (en) | Automobile headlamp detector | |
| CN113074655B (en) | Dynamic image wheel out-of-roundness monitoring method | |
| JP5576050B2 (en) | Linear levitation type high-speed rail guideway travel path inspection device and inspection method | |
| EP1891273B1 (en) | A vision system and a method for scanning a traveling surface to detect surface defects thereof | |
| CN216070000U (en) | Train wheel tread image acquisition unit and system | |
| CN2368753Y (en) | Automatic testing instrument for headlights of vehicle |
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 |