CN102589432A - Field calibration device of high-temperature forging structure light photography measurement system - Google Patents
Field calibration device of high-temperature forging structure light photography measurement system Download PDFInfo
- Publication number
- CN102589432A CN102589432A CN2012100364583A CN201210036458A CN102589432A CN 102589432 A CN102589432 A CN 102589432A CN 2012100364583 A CN2012100364583 A CN 2012100364583A CN 201210036458 A CN201210036458 A CN 201210036458A CN 102589432 A CN102589432 A CN 102589432A
- Authority
- CN
- China
- Prior art keywords
- light source
- light
- calibration device
- camera
- source base
- 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
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a field calibration device of a high-temperature forging structure light photography measurement system. The field calibration device can realize measurement on the field, the trend and each section of a high-temperature forging cast in a workshop, solves the problems in the prior art that the applicability is poor and the measurement precision is low. The field calibration device is characterized in that a calibration plate handle is arranged at the middle part of the upper part of a plane calibration plate, coding mark points and light-reflecting mark points are alternately distributed on the calibration plate body; three light source bases are arranged for a photographic light source device, a camera is arranged in the center of each light source base, a light source system connected with the camera is arranged at the periphery of the camera on each light source base, a light source controller is connected with the cameras on the three light source bases respectively by signal wires and is also connected with the light source system, and a power line and a switch are arranged on the light source controller. The field calibration device is simple in structure, convenient to operate, high in measurement speed, and high in precision, can realize non-contact long-distance/short-distance measurement, and simultaneously can obtain an in-place high-temperature forging three-dimensional model in real time to meet the requirement of thermal-state in-place measurement of the high-temperature forging.
Description
Technical field
The present invention relates to a kind of in-situ calibration device of high warm forging structured light Digital Photogrammetric System.
Background technology
At present, be a difficult point to the hot in-place detection technology of high warm forging, to this problem, the worker develops multiple detection system, but can not satisfy actual needs.Like double camera scaling method patent of invention publication number in the three-dimensional reconfiguration system is (CN1851752A), the double camera caliberating device of proposition, more complete demarcation the s internal and external orientation of two cameras.Yet this caliberating device is not considered the nominal light source problem utilizing scaling board to carry out timing signal dependence surrounding environment intensity, can't be fit to the practical application of workshop condition intensity complicated factory, and on-the-spot general applicability is relatively poor.Camera on-field calibration method patent of invention publication number in the measuring system is (CA101876532A); The double camera caliberating device that proposes; Target is projected in the factory building on the brighter and cleaner plane, demarcates the intrinsic parameter of camera, outer parameter target is projected on the forge press column; With the actual range of two transit survey unique points, demarcate the outer parameter of two cameras.But forging casting department site environment is complicated and changeable, can not all select suitable bright and clean plane and appropriate column at every turn, and incompatible occasion at large scene, casting department's circumstance complication is used.
Summary of the invention
To above-mentioned situation; For overcoming the defective of prior art; The object of the invention just provides a kind of in-situ calibration device of high warm forging structured light Digital Photogrammetric System, can realize in-site measurement, kinetic measurement and each section survey to the high warm forging of casting in the workshop, and it is poor for applicability effectively to solve prior art; Measuring accuracy is low, can not satisfy the problem of actual measurement demand.
Technical scheme of the present invention is, comprises plane reference plate and photography device, and described plane reference plate comprises plate body, and the scaling board handle is arranged in the middle of the plate body top, demarcates plate body and submits mistake and be distributed with coding will point and reflecting sign point; Described photography device comprises light source base, light source and light source controller; Light source base is 3; Camera is equipped with at each light source base center; The camera periphery is evenly equipped with the light-source system that links to each other with camera on light source base, light source controller connects three cameras on the light source base respectively through three line trigger signals, and light source controller connects light-source system respectively through three light source power lines; The power lead that connects light source controller is housed on the light source controller, and light source controller is equipped with the power switch that links to each other with power supply.
The present invention is simple in structure, and is easy to operate, and measuring speed is fast; Precision is high, can realize the measurement of noncontact, far and near distance, obtains high warm forging three-dimensional model on the throne simultaneously in real time; Instruct the actual production process of forging in real time, can finely satisfy the requirement of the hot dimensional measurement on the throne of high warm forging.
Description of drawings
Accompanying drawing 1 is two dimensional surface scaling board structural representation of the present invention.
Accompanying drawing 2 is the present invention's led light source structural drawing of photographing.
Accompanying drawing 3 is photography structure drawing of device of the present invention.
Embodiment
Below in conjunction with accompanying drawing the technical scheme of invention is done further to specifically describe.
Shown in Fig. 1-3, the present invention includes plane reference plate and photography device, described plane reference plate comprises plate body, and scaling board handle 4 is arranged in the middle of plate body 1 top, demarcates and is staggeredly distributed with coding will point 3 and reflecting sign point 2 on the plate body 1; Described photography device comprises light source base 5, light source 12 and light source controller 7; Light source base is 3; Camera 6 is equipped with at each light source base center; The camera periphery is evenly equipped with the light-source system 12 that links to each other with camera on light source base 5, light source controller 7 meets three camera 6a, 6b, 6c on the light source base respectively through three line trigger signal 9a, 9b, 9c, and light source controller 7 connects light-source system 12 respectively through three light source power line 10a, 10b, 10c; The power lead 11 that connects light source controller is housed on the light source controller 7, and light source controller is equipped with the power switch 8 that links to each other with power supply.
Described light source base 5 comprises that the first light source base 5a, secondary light source base 5b, the 3rd light source base 5c form.
Described calibration point is 42, and the coding calibration point is 9.
Described light-source system 12 is a led light source, has 6 at least, is distributed on camera periphery and the cup dolly.
Two dimensional surface scaling board of the present invention; Be the carbon fibre material, be of a size of 600mm * 600mm * 5mm, paste 42 monumented points, 9 coding maker points above; The relative position of these 51 some positions is that the three-dimensional coordinate of each point confirms that there is a grip on the scaling board top.Described monumented point and coding maker point are to adopt directed light echo reflecting material to process the light echo reflective marker that diameter is 6mm, and coding maker point adopts spot distribution type coding maker.In the image, the image of monumented point and the brightness contrast of background are obvious, produce by " accurate two-value image ", obtain high precision monumented point picpointed coordinate through Flame Image Process, and the coding maker dot image can be discerned in Flame Image Process automatically.The heavy 1.5kg of this two dimension scaling board, the distribution design of 51 some positions is reasonable, and the three-dimensional coordinate precision is high, guarantees that every pictures has the coding maker more than four to put clear imaging, satisfies the requirement of high warm forging structured light Digital Photogrammetric System on-site proving.There is a grip this two dimension scaling board top, holds handle, can conveniently be rotated in the calibration process at the scene, operation such as translation, takes many group uncalibrated images, and is simple and practical.This two dimension scaling board adopts carbon fibre material to make, and is in light weight, and structural strength is high, and is indeformable, especially do not receive temperature variation and deforms, and can adapt to high warm forging field temperature environment well.
Be used for photogrammetric three light sources of high warm forging structured light; Be installed on three discoid light source bases; Annular evenly is furnished with six led light source systems on each light source, and this light-source system is respectively installed a camera by light-source controller controls in three light source base centres.
Led light source satisfies adjustable brightness joint, working temperature is low, realization is balanced, flicker free, shadow-free camera function, and is easy to use, can satisfy noncontact, far and near distance, the requirement of the hot in-place detection of high warm forging of different light intensity condition.Adopt evenly distributed 6 great power LEDs of annular, when two-dimentional scaling board is taken in work with camera synchronization, guarantee in the time shutter of microsecond level, to collect two-dimentional clearly scaling board image.LED is a light emitting semiconductor device, and the electric current of trace is almost all changed into visible luminous energy, and light efficiency can reach 50～210 lumens/watt, and spectrum is narrow.This photography energy-saving efficiency is high, has the characteristic that WV is low, electric current is little, brightness is high.Under equal illumination effect quality, this photography led light source is than conventional light source energy-conservation 80%～90%.
This photography life cycle is longer, and LED utilizes the solid-state semiconductor chip that electric energy is converted into luminous energy, adds epoxy encapsulation, can bear high-strength mechanical and impact, and the LED life-span, maintenance cost is low, and was economical and practical more than 100,000 hours.This photography is safe, owing to use low voltage drive, luminous stable, pollution-free, no stroboscopic problem.This photography triggered response is fast, selects the stroboscopic pattern to be used with camera, and the LED luminotron response time is short, can guarantee between a plurality of light sources or light source zones of different between work switch.When adopting power supply to supply power to led light source, reach several microseconds of time of high-high brightness, efficient is high.The brightness of led light source system adjustment through voltage system 0 and 40W between free adjustment, satisfy the demand of the on-the-spot surrounding environment complicacy of high warm forging casting department.
Among the present invention; The light-source system pattern of design has stroboscopic and long bright two kinds of mode of operations, and when selecting the stroboscopic operation pattern, the corresponding camera of each light source and institute can be received same trigger pip; Through the software operation synchronous triggering, guarantee the shooting of light source exposure of flash lamp and camera synchronously.
Working condition of the present invention is:
1, three photographies 1 are installed in respectively on three cameras 2, connect the power lead 3 of three photographies simultaneously, when guaranteeing each photography work stable voltage is arranged, annular evenly is furnished with six led light source systems 4 on each photography 1;
2, the line trigger signal 6 with light source controller 5 links to each other with three cameras 2 with light source controller 5, camera and light source synchronous triggering when guaranteeing work;
3, the power lead 7 that connects light source controller;
When 4, high warm forging structured light was photogrammetric, light source controller was set to the stroboscopic pattern;
5, open the power switch 8 of light source controller 5;
6, two-dimentional scaling board is fixed on or manual work is lifted at 4-8 rice, high warm forging structured light Digital Photogrammetric System the place ahead, utilizes mounted photography 1 and the two dimensional surface scaling board that fixes to begin to carry out on-site proving work;
7, start high warm forging structured light Digital Photogrammetric System on-site proving software, each three camera synchronization are taken three sheet photos;
8, three pictures are carried out Flame Image Process, utilize calibration algorithm, calibrate the external parameter of three cameras;
9, repeating step 7, step 8 are repeatedly taken, and adjustment calibrates the optimal value of three camera external parameters, thereby carries out the in-site measurement work of the hot in-place detection of high warm forging;
10, demarcate to finish after, cut off the electricity supply and pull out power lead 7 and line trigger signal 6.
This apparatus structure is reasonable in design; Led light source satisfies adjustable brightness joint, working temperature is low, realization is balanced, flicker free, shadow-free camera function; Scaling board adopts the carbon fibre material; It is little influenced by ambient temperature, and the in-situ calibration device of high warm forging structured light Digital Photogrammetric System is easy to operate, and the on-the-spot adaptability of high warm forging in-place detection is stronger.
Claims (5)
1. the in-situ calibration device of one kind high warm forging structured light Digital Photogrammetric System; Comprise plane reference plate and photography device; It is characterized in that; Described plane reference plate comprises plate body, and scaling board handle (4) is arranged in the middle of plate body (1) top, demarcates and is staggeredly distributed with coding will point (3) and reflecting sign point (2) on the plate body (1); Described photography device comprises light source base (5), light source (12) and light source controller (7); Light source base is 3; Camera (6) is equipped with at each light source base center; The camera periphery is evenly equipped with the light-source system (12) that links to each other with camera on light source base (5); Light source controller (7) connects three cameras (6a, 6b, 6c) on the light source base respectively through three line trigger signals (9a, 9b, 9c); Light source controller (7) connects light-source system (12) respectively through three light source power lines (10a, 10b, 10c), and the power lead (11) that connects light source controller is housed on the light source controller (7), and light source controller is equipped with the power switch (8) that links to each other with power supply.
2. the in-situ calibration device of high warm forging structured light Digital Photogrammetric System according to claim 1; It is characterized in that described light source base (5) comprises first light source base (5a), secondary light source base (5b), the 3rd light source base (5c) composition.
3. the in-situ calibration device of high warm forging structured light Digital Photogrammetric System according to claim 1 is characterized in that, described reflecting sign point (2) is 42.
4. the in-situ calibration device of high warm forging structured light Digital Photogrammetric System according to claim 1 is characterized in that, described coding maker point (3) is 9.
5. the in-situ calibration device of high warm forging structured light Digital Photogrammetric System according to claim 1 is characterized in that, described light-source system (12) is a led light source, has 6 at least, is distributed on the cup dolly of camera periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100364583A CN102589432A (en) | 2012-02-17 | 2012-02-17 | Field calibration device of high-temperature forging structure light photography measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100364583A CN102589432A (en) | 2012-02-17 | 2012-02-17 | Field calibration device of high-temperature forging structure light photography measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102589432A true CN102589432A (en) | 2012-07-18 |
Family
ID=46478426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100364583A Pending CN102589432A (en) | 2012-02-17 | 2012-02-17 | Field calibration device of high-temperature forging structure light photography measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102589432A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879080A (en) * | 2012-09-11 | 2013-01-16 | 上海交通大学 | Sound field analysis method based on image recognition positioning and acoustic sensor array measurement |
| CN104008548A (en) * | 2014-06-04 | 2014-08-27 | 无锡观智视觉科技有限公司 | Feature point extraction method for vehicle-mounted around view system camera parameter calibration |
| CN104236944A (en) * | 2014-09-12 | 2014-12-24 | 北京卫星环境工程研究所 | Application of stroboscopic target recognition on lunar surface gravity simulation system |
| CN107492098A (en) * | 2017-08-17 | 2017-12-19 | 广东工业大学 | It is a kind of based on PCA and CNN high-temperature forging surface defect in position detecting method |
| CN108106568A (en) * | 2015-08-24 | 2018-06-01 | 江苏理工学院 | High-temperature forging double-mirror measuring equipment |
| CN111102928A (en) * | 2018-10-29 | 2020-05-05 | 株洲中车时代电气股份有限公司 | Calibration system and method for detecting hard spots of contact net |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851752A (en) * | 2006-03-30 | 2006-10-25 | 东南大学 | Dual video camera calibrating method for three-dimensional reconfiguration system |
| CN101373135A (en) * | 2008-07-01 | 2009-02-25 | 南京航空航天大学 | Method and apparatus for measuring three-dimensional curved surface based on instantaneous accidental light irradiation |
| JP4295664B2 (en) * | 2004-05-12 | 2009-07-15 | 株式会社神戸製鋼所 | Hot cylindrical workpiece shape measuring apparatus and hot forging method for cylindrical body using the same |
| CA2445432C (en) * | 2001-04-24 | 2009-09-22 | Krypton Electronic Engineering N.V. | Method and device for the verification and identification of a measuring device |
| CN101660894A (en) * | 2009-09-11 | 2010-03-03 | 天津大学 | Device and method based on parallel light and used for multi-vision visual detection |
| CN101876532A (en) * | 2010-05-25 | 2010-11-03 | 大连理工大学 | Camera on-field calibration method in measuring system |
| CN202420434U (en) * | 2012-02-17 | 2012-09-05 | 华北水利水电学院 | Site calibration device of light photogrammetric system for structure of high-temperature forging piece |
-
2012
- 2012-02-17 CN CN2012100364583A patent/CN102589432A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2445432C (en) * | 2001-04-24 | 2009-09-22 | Krypton Electronic Engineering N.V. | Method and device for the verification and identification of a measuring device |
| JP4295664B2 (en) * | 2004-05-12 | 2009-07-15 | 株式会社神戸製鋼所 | Hot cylindrical workpiece shape measuring apparatus and hot forging method for cylindrical body using the same |
| CN1851752A (en) * | 2006-03-30 | 2006-10-25 | 东南大学 | Dual video camera calibrating method for three-dimensional reconfiguration system |
| CN101373135A (en) * | 2008-07-01 | 2009-02-25 | 南京航空航天大学 | Method and apparatus for measuring three-dimensional curved surface based on instantaneous accidental light irradiation |
| CN101660894A (en) * | 2009-09-11 | 2010-03-03 | 天津大学 | Device and method based on parallel light and used for multi-vision visual detection |
| CN101876532A (en) * | 2010-05-25 | 2010-11-03 | 大连理工大学 | Camera on-field calibration method in measuring system |
| CN202420434U (en) * | 2012-02-17 | 2012-09-05 | 华北水利水电学院 | Site calibration device of light photogrammetric system for structure of high-temperature forging piece |
Non-Patent Citations (1)
| Title |
|---|
| 冯其强等: "基于双相机的动态测量技术研究", 《测绘科学》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879080A (en) * | 2012-09-11 | 2013-01-16 | 上海交通大学 | Sound field analysis method based on image recognition positioning and acoustic sensor array measurement |
| CN104008548A (en) * | 2014-06-04 | 2014-08-27 | 无锡观智视觉科技有限公司 | Feature point extraction method for vehicle-mounted around view system camera parameter calibration |
| CN104236944A (en) * | 2014-09-12 | 2014-12-24 | 北京卫星环境工程研究所 | Application of stroboscopic target recognition on lunar surface gravity simulation system |
| CN108106568A (en) * | 2015-08-24 | 2018-06-01 | 江苏理工学院 | High-temperature forging double-mirror measuring equipment |
| CN108106568B (en) * | 2015-08-24 | 2020-05-01 | 江苏理工学院 | High-temperature forging double-mirror measuring equipment |
| CN107492098A (en) * | 2017-08-17 | 2017-12-19 | 广东工业大学 | It is a kind of based on PCA and CNN high-temperature forging surface defect in position detecting method |
| CN107492098B (en) * | 2017-08-17 | 2018-04-10 | 广东工业大学 | It is a kind of based on PCA and CNN high-temperature forging surface defect in position detecting method |
| CN111102928A (en) * | 2018-10-29 | 2020-05-05 | 株洲中车时代电气股份有限公司 | Calibration system and method for detecting hard spots of contact net |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102589432A (en) | Field calibration device of high-temperature forging structure light photography measurement system | |
| JP6550536B2 (en) | Multi-line array laser light three-dimensional scanning system and multi-line array laser light three-dimensional scanning method | |
| CN105203046B (en) | Multi-thread array laser 3 D scanning system and multi-thread array laser 3-D scanning method | |
| CN202420434U (en) | Site calibration device of light photogrammetric system for structure of high-temperature forging piece | |
| US10772171B2 (en) | Directional lighting system and method | |
| US9198262B1 (en) | Directional lighting system and method | |
| CN108765494B (en) | Multi-camera calibration method based on cylinder calibration object | |
| CN107132031B (en) | LED maximum radiance measuring device | |
| CN102681295A (en) | Illumination device for a camera | |
| CN104730823A (en) | White balance adjustment device and method suitable for DLP projector | |
| CN101498605A (en) | Tunable multispectral vision detection light source | |
| CN105050229A (en) | Illumination system and method based on illumination setting | |
| CN109269775A (en) | Auto-correction method and system are infinitely approached based on light axis consistency measurement | |
| CN104764441A (en) | Rapid calibration equipment and system for road traffic accident field measurement | |
| CN208569701U (en) | Camera calibration device | |
| CN104374316A (en) | Image measurement device with laser scanning function | |
| CN108683908A (en) | Multi-functional caliberating device | |
| CN204613561U (en) | To mix colours the light-emitting diode flash device of coordinate | |
| CN110933804B (en) | Lamp, and lamp angle control system and method | |
| CN203365344U (en) | Image type spray code detection device | |
| CN201661980U (en) | Double LED angle modulation annular light source device for dynamic photogrammetry | |
| CN110894933B (en) | Adjusting method, adjusting system and lamp | |
| CN204165513U (en) | The efficient image measuring device of sweep type | |
| CN104375265A (en) | High definition image type measurement instrument | |
| CN203705347U (en) | Device for detecting screen meshes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120718 |