CN102192705A - Non-contact type compound scanning measuring system - Google Patents
Non-contact type compound scanning measuring system Download PDFInfo
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- CN102192705A CN102192705A CN 201010119855 CN201010119855A CN102192705A CN 102192705 A CN102192705 A CN 102192705A CN 201010119855 CN201010119855 CN 201010119855 CN 201010119855 A CN201010119855 A CN 201010119855A CN 102192705 A CN102192705 A CN 102192705A
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Abstract
The invention discloses a non-contact type compound scanning measuring system, which comprises a dot laser, a cylindrical lens, a double-sided reflector, a digital camera, an ocular lens and a reflector, wherein the digital camera and the ocular lens are mounted in parallel from top to bottom; the mounting center lines of the digital camera and the ocular lens are approximately superposed; light rays emitted from the dot laser are reflected to a measured object by a first surface of the double-sided reflector; and the light rays emitted from the measured object enter into the digital camera through the ocular lens after being reflected to a second surface of the double-sided reflector by the reflector. Compared with the prior art, the non-contact type compound scanning measuring system has the advantages that the structure is simple, the operation is convenient and fast and the surface of the object is free from being damaged; various non-contact measurements can be realized; and the measurement can be performed in a same coordinate system, the measured data are accurate, and the data acquired in various measuring manners can be integrated in the same coordinate system.
Description
[technical field]
The present invention relates to high-precision measuring equipment, a kind of contactless compound scan measuring system of more specifically saying so.
[background technology]
Three-dimensional precision measurement equipment commonly used is to use three coordinate measuring machine, the measurement component of its use is a probe, the parts that belong to contact, the parts of this kind contact are powerless for the testee of flexible material, and it is very low to obtain efficient for the complex-curved data that testee has.
In order to solve this difficult problem, contactless measuring equipment has also appearred on the market, and as three-dimensional laser scanner, but the measured data precision of this equipment is not high, and this equipment also seems powerless to the border of testee.If use three coordinate measuring machine or three-dimensional laser scanner to obtain contour of object, utilize the equipment (as the image-type measuring instrument) of Measured Boundary to come the border of Measuring Object again, because repeatedly the instrument of measuring not is an instrument, then the D coordinates value of the object of surveying is difficult to unified.
In view of above drawback, be necessary to research and develop a kind of new contactless compound scan measuring system in fact to overcome above-mentioned defective.
[summary of the invention]
The purpose of this invention is to provide a kind of multiple measurement that can realize the object dimensional data, and with the high-precision contactless compound scan measuring system that is unified in the coordinate system of the data of multiple measurement.
To achieve these goals, the present invention adopts following technical scheme: a kind of contactless compound scan measuring system, it comprises dot laser, double mirror, digital camera, eyepiece and catoptron, wherein, described digital camera and the from up to down parallel installation of eyepiece, its the two mounting center line roughly overlaps, the light that described dot laser sends reflexes to testee through the first surface of double mirror, and the light that testee sends enters digital camera by eyepiece through mirror reflects to the second surface of double mirror.
Preferential is, described contactless compound scan measuring system is provided with switching device shifter and cylindrical lens.
Preferential is, described contactless compound scan measuring system also is provided with switching device shifter and high magnification object lens, and described switching device shifter can make that dot laser, cylindrical lens, double mirror and catoptron do not participate in measuring.
Compared to prior art, the present invention has following advantage:
1. simple in structure, easy to operate;
2. measure in same coordinate system, multiple metering system gained data can be unified in the coordinate system, and measuring speed is quick;
3. measure the data precision height of gained.
[description of drawings]
Fig. 1 is the structural principle synoptic diagram of contactless compound scan measuring system;
Fig. 2 is the principle schematic that the present invention is in an accurate laser measurement;
Fig. 3 is the light path isoboles that the present invention is in an accurate laser measurement;
Fig. 4 is the triangulation schematic diagram that the present invention adopts;
Fig. 5 is the principle schematic that the present invention is in the line laser high-velocity scanning;
Fig. 6 is the light path isoboles that the present invention is in the line laser high-velocity scanning;
Fig. 7 is that the present invention is in Eikonometric principle schematic.
[embodiment]
Below by specific embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Please refer to shown in Figure 1ly, Fig. 1 is the structural principle synoptic diagram of contactless compound scan measuring system.Contactless compound scan measuring system 100, it comprises high magnification object lens 10, dot laser 20, cylindrical concave lens 30, double mirror 40, digital camera 50, eyepiece 60, catoptron 70 and a cover switching device shifter (not shown), and wherein the direction that is reflected after the some laser process double mirror 40 that dot laser 20 produces and the optical axis of eyepiece 60 overlap.This switching device shifter switches assembly wherein, thereby reaches different duties according to work requirements.Following is described three kinds of duties.
Please refer to shown in Figure 2ly, Fig. 2 is that this system is in the high-accuracy surveying work state of a laser.The class of operation of some accurate laser measurement and probe measurement seemingly need to prove that end of probe is generally ball-type, three-dimensional data value for accurate Measuring Object, need face the measured surface of object, and some laser there is not this phenomenon, can not face the surface measurements of object; But, generally face the measured surface of object in order to use the program that probe-type measures and the habituation of operation.The light path of this kind duty as shown in Figure 2, the point-like laser that dot laser 20 sends, face testee 90 after arriving double mirror 40 reflections, arrive the another side of double mirror 40 then through catoptron 70, arrive digital camera 50 through eyepiece 30 at last.Switching device shifter will be removed cylindrical concave lens 30 and high magnification object lens 10 this moment, the flight path of the line representative point laser of band arrow among this Fig. 2.And digital camera 50 and eyepiece 60 then by one group of double mirror 40 and catoptron 70, are mirrored to second digital camera 50 ' among the figure and the position of second eyepiece 60 ', and its equivalent index path is shown in Figure 3.
By the triangulation principle, the just accurate three-dimensional data of Measuring Object.The principle of triangulation is as shown in Figure 4: size L is the distance that testee 90 surfaces are arrived in laser radiation, and the laser of this moment just is reflected in the center of the target surface of digital camera 50.A is the angle of laser and second eyepiece, 60 ' optical axis, i.e. the angle of design and installation.When testee 90 was in position L ', then computation process was as follows:
The target surface center dX of the imaging skew of laser in digital camera 50, dX ' is directly proportional with dX among the figure, establishes K=dX '/dX, and promptly K is a magnification ratio.L '=L+dX '/sin (a)=L+K*dX/sin (a) then.
Fig. 5 is that this system is in the duty that the line laser high-velocity scanning is measured, i.e. 3 D laser scanning duty.The light path of its work as shown in Figure 5.The point-like laser that dot laser 20 sends, become line laser through cylindrical concave lens 30, arrive double mirror 40 then, shine testee 90 after being reflected, arrive the another side of double mirror 40 then through catoptron 70, arrive digital camera 50 through eyepiece 60 at last.Switching device shifter will be removed high magnification object lens 10 this moment.The line of band arrow is represented the flight path of laser among this Fig. 5.Similar to Fig. 2 is, digital camera 50 and eyepiece 60 by one group of double mirror 40 and catoptron 70, are mirrored to the 3rd digital camera 51 ' among Fig. 5 and the position of the 3rd eyepiece 61 ', and its equivalent index path is Fig. 6.This state has utilized the triangulation ratio juris equally, different is, point laser is by behind the cylindrical concave lens 30, become finishing tool, on object, formed laser rays one, thereby reached the purpose of the three-dimension curved surface of high-velocity scanning testee, with respect to traditional probe-type scanning, improve efficient greatly, and do not had the phenomenon that scratches body surface.
Fig. 7 is that this system is in the high-accuracy surveying work state of image-type.Radiographic measurement is the magnification ratio according to camera lens, comes the boundary profile of recognition object by artificial or computing machine, reaches the purpose of measurement.Switching device shifter will be removed double mirror 40 this moment, and laser instrument 20 is closed simultaneously.The light path of its work is as shown in Figure 7: the boundary profile of testee, by high magnification object lens 10, arrive eyepiece 60, and arrive digital camera 50 at last.Yet image-type is measured the planar profile that can only obtain object, for elevation information, needs to obtain by automatic focus.Self-focusing principle is: when object was in focal position, its imaging was the most clear, at this time, and the difference sum maximum of neighbor.
In order to allow coordinate system come together, we must use same calibration device to determine Inside Parameter Value under the different conditions.Can adopt process as described below: bidding allocates face perpendicular to the Z axle, and the some laser vertical shines demarcates the plane.Because in above-mentioned duty, some laser overlaps with the optical axis of camera lens through behind the double mirror 40, XY coordinate in the then above-mentioned duty is unified, and its deviation is the registration between the two, in the practical application, can pass through micromatic setting, reach very high registration accuracy.What we need proofread and correct so is: the coordinate on the Z-direction is unified, the distance between the focal length when L when promptly putting laser measurement state (or line laser scanning mode) among Fig. 4 and radiographic measurement.At first, system is switched to a laser measurement state, the distance between Adjustment System and the correcting block makes the center of invocation point laser imaging at the target surface of digital camera.Write down coordinate figure.Switch to the radiographic measurement state then, the distance between Adjustment System and the correcting block when dot matrix imaging on correcting block is more clear, according to the automatic focus principle, is come automatic focus by program again, to reach best focal position, writes down coordinate figure; Then the coordinate between the two is poor, is compensation rate.To be benchmark under the laser measurement state, during radiographic measurement, its elevation information will add this compensation rate, just can unify the coordinate of Z axle.
The contactless compound scan measuring system of the present invention owing to be on the same measuring machine, need not the situation of multiple clamping testee in above-mentioned different duty, does not have multiple clamping location equal error; Because multiple measurement means combines, form an integral body simultaneously, can use same calibration device, demarcated the inner parameter of the different operating state of this system.In sum, the data measured down of each state just can high unity in a coordinate system.Can reach micron-sized precision through repeatedly experiment showed; Because testee need not multiple clamping, and high-velocity scanning and high-acruracy survey all select as required, improved work efficiency greatly.
The above only is the preferred embodiments of the present invention; be not so limit claim of the present invention; every equivalent structure or equivalent transformation that utilizes instructions of the present invention and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (3)
1. contactless compound scan measuring system, it comprises dot laser, double mirror, digital camera, eyepiece and catoptron, it is characterized in that: described digital camera and the from up to down parallel installation of eyepiece, its the two mounting center line roughly overlaps, the light that described dot laser sends reflexes to testee through the first surface of double mirror, and the light that testee sends enters digital camera by eyepiece through mirror reflects to the second surface of double mirror.
2. contactless compound scan measuring system as claimed in claim 1 is characterized in that: described contactless compound scan measuring system is provided with switching device shifter and cylindrical lens.
3. contactless compound scan measuring system as claimed in claim 1, it is characterized in that: described contactless compound scan measuring system also is provided with the high magnification object lens, and described switching device shifter can make dot laser, cylindrical lens, double mirror and catoptron remove and make it not participate in to measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101198558A CN102192705B (en) | 2010-03-08 | 2010-03-08 | Non-contact type compound scanning measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101198558A CN102192705B (en) | 2010-03-08 | 2010-03-08 | Non-contact type compound scanning measuring system |
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| Publication Number | Publication Date |
|---|---|
| CN102192705A true CN102192705A (en) | 2011-09-21 |
| CN102192705B CN102192705B (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101198558A Expired - Fee Related CN102192705B (en) | 2010-03-08 | 2010-03-08 | Non-contact type compound scanning measuring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084682A (en) * | 2018-09-25 | 2018-12-25 | 福耀集团（上海）汽车玻璃有限公司 | Vehicle glass automatic detection device and method |
| CN109489691A (en) * | 2018-12-07 | 2019-03-19 | 银河航天(北京)通信技术有限公司 | Optical calibrating system and scaling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11316113A (en) * | 1998-04-30 | 1999-11-16 | Asahi Glass Co Ltd | Form measuring device |
| CN2387506Y (en) * | 1999-09-11 | 2000-07-12 | 海信集团公司 | Laser linear scanning 3D digital measurer |
| US20020024677A1 (en) * | 2000-08-23 | 2002-02-28 | Leonard Metcalfe | Method and apparatus for scanning lumber and other objects |
| CN101614534A (en) * | 2009-07-20 | 2009-12-30 | 重庆大学 | Can realize the mounting structure of the multiple sensors of duplex measurement |
-
2010
- 2010-03-08 CN CN2010101198558A patent/CN102192705B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11316113A (en) * | 1998-04-30 | 1999-11-16 | Asahi Glass Co Ltd | Form measuring device |
| CN2387506Y (en) * | 1999-09-11 | 2000-07-12 | 海信集团公司 | Laser linear scanning 3D digital measurer |
| US20020024677A1 (en) * | 2000-08-23 | 2002-02-28 | Leonard Metcalfe | Method and apparatus for scanning lumber and other objects |
| CN101614534A (en) * | 2009-07-20 | 2009-12-30 | 重庆大学 | Can realize the mounting structure of the multiple sensors of duplex measurement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084682A (en) * | 2018-09-25 | 2018-12-25 | 福耀集团（上海）汽车玻璃有限公司 | Vehicle glass automatic detection device and method |
| CN109489691A (en) * | 2018-12-07 | 2019-03-19 | 银河航天(北京)通信技术有限公司 | Optical calibrating system and scaling method |
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| Publication number | Publication date |
|---|---|
| CN102192705B (en) | 2013-11-13 |
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