CN101839697A - Optical system for use in shaft hole diameter measurement - Google Patents
Optical system for use in shaft hole diameter measurement Download PDFInfo
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- CN101839697A CN101839697A CN 201010151256 CN201010151256A CN101839697A CN 101839697 A CN101839697 A CN 101839697A CN 201010151256 CN201010151256 CN 201010151256 CN 201010151256 A CN201010151256 A CN 201010151256A CN 101839697 A CN101839697 A CN 101839697A
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Abstract
The invention discloses an optical system for use in hole diameter measurement and relates to the technical field of advanced optical design and precise measurement. The optical system comprises an photoelectric detection device, a reference device, a fixed regulation device, an imaging device and a lighting device, wherein the photoelectric detection device, the fixed regulation device, the imaging device and the lighting device are arranged symmetrically relative to the reference device; the variation of the diameter of a shaft hole is not vertical to the optical axis of the imaging device; the photoelectric detection device is fixed on the fixed regulation device; the imaging device is fixed on the fixed regulation device along the direction of the inclined surface of the fixed regulation device; the lighting device is fixed on the fixed regulation device horizontally; and the fixed regulation device is fixed on the reference device. In the embodiment of the invention, the accurate imaging measurement of a to-be-measured geometric value which cannot be observed positively nor imaged positively is realized, and the requirements for measuring the diameter of the shaft hole are met.
Description
Technical field
The present invention relates to advanced optical design and Technology of Precision Measurement field, particularly a kind of optical system that is applied to shaft hole diameter measurement.
Background technology
Along with the development of measuring technique, the multiple optical system that is applied to inner diameter measurement has been proposed in the prior art, can realize measuring by these optical systems, tentatively satisfied the needs in the practical application.
The inventor finds that there is following shortcoming and defect at least in above-mentioned prior art in realizing process of the present invention: measuring method of the prior art can not be to can't forward observing or the geometric sense to be measured of forward imaging is carried out imaging measurement accurately.
Summary of the invention
In order to realize to can't forward observing or the geometric sense to be measured of forward imaging is carried out imaging measurement accurately, satisfy in the practical application needs to inner diameter measurement, the embodiment of the invention will be applied to field of measuring technique from the imaging shaft technology, a kind of optical system that is applied to shaft hole diameter measurement is provided, and described technical scheme is as follows:
The embodiment of the invention provides a kind of optical system that is applied to shaft hole diameter measurement, and described optical system comprises: geometric sense to be measured (geometric sense that shaft hole diameter changes or other can't forward be observed), Electro-Optical Sensor Set, standard apparatus, fixedly adjusting gear, imaging device, lighting device;
Described geometric sense to be measured, described Electro-Optical Sensor Set, described fixedly adjusting gear, described imaging device, described lighting device are placed with respect to described standard apparatus symmetry; The optical axis out of plumb of described geometric sense to be measured and described imaging device; Described Electro-Optical Sensor Set is fixed on the described fixedly adjusting gear; Described imaging device is fixed on the described fixedly adjusting gear along the bevel direction of described fixedly adjusting gear; Described lighting device is fixed on the described fixedly adjusting gear along the surface level direction; Described fixedly adjusting gear is fixed on the described standard apparatus.
The plane of described geometric sense to be measured and the planar conjugate of described Electro-Optical Sensor Set.
Described imaging device and/or described lighting device adopt the ventricumbent modes of emplacement of optics.
Object lens in the described imaging device adopt 3 groups 4 lens.
The beneficial effect of the technical scheme that the embodiment of the invention provides is:
By optical axis and the geometric sense out of plumb to be measured that makes imaging device, to apply in the axis hole measurement from the imaging shaft technology, realized can't forward observing or the geometric sense to be measured of forward imaging is carried out imaging measurement accurately, satisfied in the practical application needs shaft hole diameter measurement; And, solved geometric sense to be measured a certain position imaging clear, a certain position imaging and do not known the problems such as measuring accuracy is not high that reach by adopting from the axle optical design.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the optical system that provides of the embodiment of the invention;
Fig. 2 is the ray tracing synoptic diagram of the optical system that provides of the embodiment of the invention.
In the accompanying drawing, the list of parts of each label representative is as follows:
1-1: geometric sense to be measured; 1-2: Electro-Optical Sensor Set; 1-3: standard apparatus; 1-4 is adjusting gear fixedly; 1-5: imaging device; 1-6: lighting device.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
In order to realize to can't forward observing or the geometric sense to be measured of forward imaging is carried out imaging measurement accurately, satisfy in the practical application needs to shaft hole diameter measurement, to be applied in the embodiment of the invention from the imaging shaft technology, the embodiment of the invention provides a kind of optical system that is applied to shaft hole diameter measurement, referring to Fig. 1, this system mainly comprises: geometric sense 1-1 to be measured, Electro-Optical Sensor Set 1-2, standard apparatus 1-3, fixedly adjusting gear 1-4, imaging device 1-5, lighting device 1-6;
Geometric sense 1-1 to be measured, Electro-Optical Sensor Set 1-2, fixedly adjusting gear 1-4, imaging device 1-5, lighting device 1-6 be with respect to the symmetrical placement of standard apparatus 1-3; The optical axis out of plumb of geometric sense 1-1 to be measured and imaging device 1-5; Electro-Optical Sensor Set 1-2 is fixed on fixedly on the adjusting gear 1-4; On imaging device 1-5 is fixed on fixedly adjusting gear 1-4 along the fixing bevel direction of adjusting gear 1-4; On lighting device 1-6 is fixed on fixedly adjusting gear 1-4 along the surface level direction, and keep the beam level of lighting device 1-6; Fixedly adjusting gear 1-4 is fixed on the standard apparatus 1-3.
Wherein, the geometric sense that geometric sense to be measured is meant mainly that shaft hole diameter changes or other can't forward be observed.
During specific implementation, the optical axis of imaging device 1-5 and geometric sense 1-1 out of plumb to be measured, making has certain included angle between the optical axis of imaging device 1-5 and the geometric sense 1-1 to be measured, realized from the imaging shaft The Application of Technology, the number of degrees of this angle are relevant with the physical size of geometric sense to be measured, during specific implementation, the embodiment of the invention does not limit this.On imaging device 1-5 was fixed on fixedly adjusting gear 1-4 along the bevel direction of stationary installation 1-4, this bevel direction was by the design parameter decision from the imaging shaft object lens, and during specific implementation, the embodiment of the invention does not limit this.
Said fixing adjusting gear 1-4 is used for fixing geometric sense 1-1 to be measured, Electro-Optical Sensor Set 1-2, imaging device 1-5 and lighting device 1-6, this fixed form can be fixed for draw-in groove, bolt or other fixed form, during specific implementation, the embodiment of the invention does not limit this.
In sum, will be applied in the shaft hole diameter measurement from the imaging shaft technology, having solved in the practical application can not be to can't forward observing or the geometric sense to be measured of forward imaging is carried out the problem of imaging measurement accurately.
Because the optical axis out of plumb of geometric sense 1-1 to be measured and imaging device 1-5, make the object distance of the relative imaging device 1-5 of different parts of geometric sense 1-1 to be measured differ bigger, on the one hand owing to exist the influence of the depth of field can make a certain position imaging clear, a certain position imaging of geometric sense 1-1 to be measured unclear; Cause magnification to have difference because of the object distance of the different parts of geometric sense 1-1 to be measured is different on the other hand, produce perspective distortion, and then make the measuring accuracy to geometric sense 1-1 to be measured exert an influence.
In order to solve the unclear problem that measuring accuracy is exerted an influence that reaches of geometric sense 1-1 to be measured a certain position imaging clear, a certain position imaging further, the embodiment of the invention has adopted further from the axle optical design, sees for details hereinafter to describe:
Can solve the unclear problem of a certain position imaging clear, a certain position imaging of geometric sense 1-1 to be measured by design to the objective lens of imaging device 1-5, the embodiment of the invention preferably adopts the object lens among the imaging device 1-5 3 groups 4 lens, got access to 1～3 times image magnification by these lens, improved the quality of imaging, through scaling method, can improve the measuring accuracy of geometric sense 1-1 to be measured further, can also adopt the lens of other group sheets during specific implementation, the embodiment of the invention does not limit this.Referring to Fig. 2, provided the ray tracing synoptic diagram that draws behind the lens that object lens among the imaging device 1-5 adopt 3 groups 4 among Fig. 2, can know that by this figure geometric sense 1-1 to be measured has been exaggerated 1～3 times, improve image quality, can know the measuring accuracy that has improved geometric sense to be measured by this device further.
In sum, above-mentioned by adopting from the axle optical design, solve the unclear problem of geometric sense to be measured a certain position imaging clear, a certain position imaging, and further improved the precision of measuring.
Further, in order to solve the problem of the measuring error that produces because of perspective distortion, the embodiment of the invention is preferably with the planar conjugate of the geometric sense 1-1 to be measured of the plane of the Electro-Optical Sensor Set 1-2 that tilts and inclination, thereby proofreaied and correct perspective distortion.
Further, for fear of in use imaging device 1-5, lighting device 1-6 are subjected to the contaminating impurity in the external environment, for example: impurity such as chip, dust, the embodiment of the invention preferably adopt the ventricumbent modes of emplacement of optics with imaging device 1-5 and/or lighting device 1-6.
Further, this Electro-Optical Sensor Set 1-2 can be CCD (Charge-coupled Device, charge-coupled image sensor), PSD (Position Sensitive Device, position sensitive detector) device such as, can also be other device during specific implementation, the embodiment of the invention does not limit this.
Further, the multiple needs when satisfying actual measurement during specific implementation, can adopt one or more groups array mode in a plurality of radial direction geometric sense 1-1 to be measured to be measured simultaneously.
Further, in order to obtain measurement effect preferably, the embodiment of the invention has preferably adopted the laser instrument of magnetic tape trailer fibre, and laser instrument is external, during specific implementation, can also be other laser instrument, and the embodiment of the invention does not limit this.
During specific implementation, Electro-Optical Sensor Set 1-2 can be photodetector; Standard apparatus 1-3 can be the center reference post; Fixedly adjusting gear 1-4 can be for adjusting piece; Imaging device 1-5 can be the optical detection camera lens; Lighting device 1-6 can be optical fiber collimator.During specific implementation, said apparatus can also be other corresponding devices, and the embodiment of the invention does not limit this.
The embodiment of the invention with photodetector, center reference post, to adjust piece, optical detection camera lens, optical fiber collimator be example that the groundwork mode of this optical system is described, detailed description vide infra:
At first, photodetector, center reference post, adjustment piece, optical detection camera lens, optical fiber collimator are fixed according to the fixed form of foregoing description; Secondly, after optical fiber collimator is exported after collimating, the laser radiation behind the collimation is on geometric sense to be measured through fiber optic conduction for the laser that the laser instrument of magnetic tape trailer fibre penetrates, reflect, reflected light is imaged on the photodetector through the optical detection lens imaging, and photodetector receives and output; Once more, the result who exports is connected in the circuit of practical application, calculates, finally obtain actual measurement result, promptly can realize accurate measurement by the way geometric sense to be measured.
In sum, the embodiment of the invention provides a kind of optical system that is applied to shaft hole diameter measurement, this system has solved the problem that can't carry out accurate imaging measurement in the practical application to the geometric sense to be measured of forward observation or forward imaging by being applied in the shaft hole diameter measurement from the imaging shaft technology; By adopting, solved the unclear and not high problem of measuring accuracy of geometric sense to be measured a certain position imaging clear, a certain position imaging from the axle optical design.
It will be appreciated by those skilled in the art that accompanying drawing is the synoptic diagram of a preferred embodiment, the invention described above embodiment sequence number is not represented the quality of embodiment just to description.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. an optical system that is applied to shaft hole diameter measurement is characterized in that, described optical system comprises:
Geometric sense to be measured, Electro-Optical Sensor Set, standard apparatus, fixedly adjusting gear, imaging device, lighting device; Described geometric sense to be measured, described Electro-Optical Sensor Set, described fixedly adjusting gear, described imaging device, described lighting device are placed with respect to described standard apparatus symmetry; The optical axis out of plumb of described geometric sense to be measured and described imaging device; Described Electro-Optical Sensor Set is fixed on the described fixedly adjusting gear; Described imaging device is fixed on the described fixedly adjusting gear along the bevel direction of described fixedly adjusting gear; Described lighting device is fixed on the described fixedly adjusting gear along the surface level direction; Described fixedly adjusting gear is fixed on the described standard apparatus.
2. optical system according to claim 1 is characterized in that, the plane of described geometric sense to be measured and the planar conjugate of described Electro-Optical Sensor Set.
3. optical system according to claim 1 is characterized in that, described imaging device and/or described lighting device adopt the ventricumbent modes of emplacement of optics.
4. according to claim 1 or 3 described optical systems, it is characterized in that the object lens in the described imaging device adopt 3 groups 4 lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010151256 CN101839697A (en) | 2010-04-20 | 2010-04-20 | Optical system for use in shaft hole diameter measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010151256 CN101839697A (en) | 2010-04-20 | 2010-04-20 | Optical system for use in shaft hole diameter measurement |
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| CN101839697A true CN101839697A (en) | 2010-09-22 |
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| CN 201010151256 Pending CN101839697A (en) | 2010-04-20 | 2010-04-20 | Optical system for use in shaft hole diameter measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940374A (en) * | 2014-04-09 | 2014-07-23 | 华南理工大学 | System and method for detecting perpendicularity of group holes based on vision measurement |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007024646A (en) * | 2005-07-14 | 2007-02-01 | Daido Gakuen | Optical measuring instrument |
| CN101023319A (en) * | 2004-09-22 | 2007-08-22 | 罗伯特·博世有限公司 | Optical measuring device for measuring several surfaces of a measuring object |
-
2010
- 2010-04-20 CN CN 201010151256 patent/CN101839697A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101023319A (en) * | 2004-09-22 | 2007-08-22 | 罗伯特·博世有限公司 | Optical measuring device for measuring several surfaces of a measuring object |
| JP2007024646A (en) * | 2005-07-14 | 2007-02-01 | Daido Gakuen | Optical measuring instrument |
Non-Patent Citations (1)
| Title |
|---|
| 《长春工程学院学报》 20081231 杨崇波等 内径尺寸光电位移检测系统设计 73-76 1-4 第9卷, 第1期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940374A (en) * | 2014-04-09 | 2014-07-23 | 华南理工大学 | System and method for detecting perpendicularity of group holes based on vision measurement |
| CN103940374B (en) * | 2014-04-09 | 2017-01-04 | 华南理工大学 | Group's hole perpendicularity detecting system that group's hole perpendicularity detection method of a kind of view-based access control model measurement and the view-based access control model of employing the method are measured |
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Open date: 20100922 |