CN106767537A - A kind of monocular various dimensions profile scan device - Google Patents
A kind of monocular various dimensions profile scan device Download PDFInfo
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- CN106767537A CN106767537A CN201710164252.1A CN201710164252A CN106767537A CN 106767537 A CN106767537 A CN 106767537A CN 201710164252 A CN201710164252 A CN 201710164252A CN 106767537 A CN106767537 A CN 106767537A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/2518—Projection by scanning of the object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/254—Projection of a pattern, viewing through a pattern, e.g. moiré
Abstract
The invention discloses a kind of monocular various dimensions profile scan device, including two isosceles right-angle prisms and objective table；One of right-angle surface of each isosceles right-angle prism is vertically arranged, and objective table is located between two right-angle surfaces being vertically arranged, and workpiece to be detected is put into another right-angle surface that its contour surface in the vertical direction when on the objective table does not stretch out the isosceles right-angle prism；A word line structure light is provided with directly over objective table, the light bright line of the yi word pattern that the word line structure light is projected straight down is covered on workpiece for measurement；The video camera being connected with PC ends is additionally provided with immediately ahead of the objective table, the camera of the video camera can comprehensively shoot the image of the described smooth bright line on the isosceles right-angle prism and workpiece for measurement surface.The side profile of workpiece can be projected top surface profile by the device, can carry out the visual angle design of video camera to realize various dimensions profile scan and while meet contour equidistant high-precision vision imaging demand.
Description
Technical field
The invention belongs to piece surface contour detecting technical field, more particularly to a kind of irregular contour in cross-sectional area
With volume testing equipment.
Background technology
In daily production and living, the feelings for needing on-line checking product stereo profile and online cutting of fixed quantity are frequently encountered
The bulk object equivalent point such as condition, such as noble metal bar cutting of fixed quantity, the online cutting of fixed quantity of irregular glass bar, bread quantitative cutting
Zero application.Existing equipment will complete the work of this respect, usually require first work piece to be made the bar of standard section product
Shape, is then split by specified length to realize the purpose of equivalent cutting again, and the defect of this mode is larger, outstanding error
It is to be difficult to be processed into the bar shaped of standard section product for fragile material, and processing is in strip this procedure and can produce in itself necessarily
Cost, to also have additional many techniques to need perfect, therefore the above-mentioned object for being processed at present needs to count again mostly
Amount and screening.And the noncontact visual detection equipment of existing market mainly has following two aspect, one is due to general
The multiplication factor of machine visual lens is less than 1, has thus resulted in the angle of visual field of certain aperture, and this is observed in the longitudinal direction
For rectangular bar, be cannot see left side and right flank pattern appearance information, a kind of solution is along sight line
The reflective mirror at certain inclination angle is installed in direction in the left and right sides respectively, but due to light path overall length is inconsistent cannot be burnt in same camera lens
See that equally clearly image, image distance have big difference on face；On the other hand, for those surface undulations less (concavo-convex unobvious)
But to carry out Precise outline scanning three-dimensional parts (the rectangular steel bar in such as cross section or other there are many of various faces
Face body structure) for, one surface is extended transversely, and the surface (two sides) of its both sides extends longitudinally, and causes pole
Big imageing sensor breadth is wasted, and most directly influence is exactly to cause image frame per second/temporal resolution to drop significantly for one of them
Low, this is huge defect for those industrial parts for needing quick detection, will have a strong impact on its final detection knot
Really, because the frame per second and resolution ratio of same band hypograph sensor are inversely.
The content of the invention
It is an object of the invention to solve above-mentioned technical problem, there is provided a kind of monocular various dimensions profile scan device, the dress
Putting can project top view by the side view of workpiece, design to realize various dimensions profile scan by the visual angle for carrying out video camera,
And contour equidistant high-precision vision imaging demand is met simultaneously.
Technical scheme is as follows：
A kind of monocular various dimensions profile scan device, including two isosceles right-angle prisms and objective table；Each isosceles right angle
One of right-angle surface of prism is vertically arranged, and the objective table is located between two right-angle surfaces being vertically arranged, workpiece to be detected
It is put into another right-angle surface that its contour surface when on the objective table does not touch the isosceles right-angle prism in the horizontal direction；
A word line structure light source is provided with directly over the objective table, the word line structure light source is projected straight down
The light bright line of yi word pattern be covered on the upper surface that workpiece for measurement and prism levels are set；
The video camera being connected with PC ends is additionally provided with the upper front of the objective table, the camera of the video camera can be comprehensive
Shoot the image of the described smooth bright line on the isosceles right-angle prism and workpiece for measurement surface.
Further, the monocular various dimensions profile scan device possesses following Parameter Conditions：
Wherein, Δ h=H, Δ h are the virtual image of the ambient light bright line of the workpiece seen by prism with respect to isosceles right angle
The height on prism base, H is the height of the upper surface relative to isosceles right-angle prism base of measured workpiece, and d is isosceles right-angled edge
The right angle edge lengths of mirror, n is the refractive index of isosceles right-angle prism, and θ is the visual angle of video camera, LfErected described in workpiece and corresponding side
Horizontal interval distance between the right-angle surface of the straight isosceles right-angle prism for setting.
Conversely, when the design object for having specific isosceles right-angle prism and height to be measured, phase can be designed by relationship below
The visual angle of installation oblique angle, the i.e. video camera of machine is designed calculating：
Further, a piano convex cylindrical lens, institute are provided between two isosceles right-angle prisms and a word line structure light source
The flat mirror for stating piano convex cylindrical lens is parallel with the horizontally disposed right-angle surface of isosceles right-angle prism.Or the two of a wordline
Individual diverging direction is respectively mounted two panels speculum close to the position of prism, and speculum is less than sharp with the angle α of laser optical axis
The half of light divergence angle beta and more than 0, i.e., 0<α<β/2.
Further, the word line structure light source is colored structures light source, two upper surfaces of waist right-angle prism, i.e.,
An a kind of filter for only allowing light of color to pass through is respectively equipped between two isosceles right-angle prisms and the piano convex cylindrical lens
Light microscopic, and the color of light that two optical filterings are passed through is different；Or directly by two isosceles right-angle prism plated surfaces
Film realizes colour filter function.
Further, the right-angle surface that the left and right sides of the objective table are vertically arranged with isosceles right-angle prism two separates.
Further, the isosceles right-angle prism is embedded in the mounting seat of rectangular-shape, by described in the mounting seat
The side of objective table is provided with 45 degree of inclined planes, and the inclined-plane of the isosceles right-angle prism is brought into close contact with 45 degree of inclined planes.
Beneficial effects of the present invention：Three facial contours of workpiece are projected same water by the present invention using isosceles right-angle prism
In average face, so as to IMAQ, acquisition becomes apparent from accurate image, and using contour design further by left and right two
The contour images of side are projected in the plane coplanar with workpiece top surface, not only by the contour images (light bright line) in three faces at one
On face the height change scope of very little or without in the range of difference in height it is (coplanar) concentrate intake, solve digital camera multidimensional
Degree, the excessive problem of the geometric area especially shared by orthogonal dimensions image, improve digital camera photosensitive unit utilization rate,
It is dynamic to improve by improving video camera frame per second/time precision and then realization improves the purpose of digital camera frame per second/time precision
The speed and precision of state detection；And the image light bright line of all contoured surfaces coplanar collinearly also achieve all profiles to be detected and arrives
The equivalent air path of camera lens is apart from equal, i.e., equivalent total light of the light bright line that each profile point is projected to camera lens
Cheng Xiangtong, so as to further improve the image-capturing resolution of camera picture, reduces the vision algorithm difficulty of information extraction, improves dynamic
The speed and precision of state detection.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the cross-sectional view that the present invention cuts open from a word line structure light source.
Fig. 3 is the position view of the light bright line observed by human eye from side when detecting qualified workpiece.
The image schematic diagram of bright line position shown in Fig. 3 that Fig. 4 is arrived for shot by camera.
Fig. 5 is that the position of the light bright line observed by human eye from side when detecting that there is rough workpiece on surface is illustrated
Figure.
The image schematic diagram of bright line position shown in Fig. 5 that Fig. 6 is arrived for shot by camera.
Fig. 7 be human eye from side gradually change visual angle when light bright line change in location schematic diagram.
Fig. 8 is the schematic diagram after the profile hidden line (dotted line) for deleting each component in Fig. 7.
The image schematic diagram of bright line position change shown in Fig. 7 that Fig. 9 is arrived for shot by camera.
Contour, the equidistant light bright line schematic diagram that Figure 10 is photographed for video camera.
Figure 11 is the structural representation of the invention for being provided with mounting seat.
Figure 12 is to be provided with the cross-sectional view that the present invention of mounting seat cuts open from a word line structure light source.
Figure 13 is that parameter derives optical schematic diagram.
Figure 14 is the schematic structural view of the invention for being provided with piano convex cylindrical lens.
Figure 15 is the schematic structural view of the invention for being provided with speculum.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages of the invention and effect easily.
The invention will be further described with reference to the accompanying drawings and examples：
As shown in Fig. 1-2, a kind of monocular various dimensions profile scan device, including two isosceles right-angle prisms 4 and objective table
5；One of right-angle surface of each isosceles right-angle prism 4 is vertically arranged, and the objective table 5 is located at two right-angle surfaces being vertically arranged
Between, its contour surface in the vertical direction should be less than the isosceles right-angled edge when workpiece to be detected 6 is put on the objective table 5
Another right-angle surface of mirror 4, i.e., do not expose the horizontally disposed right-angle surface of isosceles right-angle prism 4, to ensure the two of workpiece for measurement 6
Side profile light can perpendicular projection in the right-angle surface that isosceles right-angle prism 4 is vertically arranged.Usually, workpiece height is rib
Half of mirror height or so can make video camera obtain preferable observed bearing.
Be provided with a word line structure light source 7 in the surface of the objective table 5, a word line structure light source 7 can for wall scroll or
A plurality of chroma clear rester or lines laser, such as yi word pattern laser, are widely used in ready-made clothes laser positioning, clothes buttoning spot light
Positioning, fabric cutter fabric dividing Auxiliary Marking, clothes flanging straight line laser positioning etc., can inspire a visible straight line wire speck
(light bright line), the light bright line of the yi word pattern that the word line structure light source 7 is projected straight down is covered in workpiece for measurement 6 and isosceles
The upper surface (horizontally disposed right-angle surface) of right-angle prism 4, wherein being projected onto work to be measured by the laser rays that prism 4 is totally reflected
The side of part.
The video camera 8 being connected with PC ends (not shown), the video camera are additionally provided with the front of the objective table 5
8 camera can comprehensively shoot the image of the described smooth bright line on the isosceles right-angle prism 4 and the surface of workpiece for measurement 6.
(for ease of visual representation, herein including using human eye in subsequent embodiment in certain side position for example shown in 3-4
Put the image observed carries out contrast demonstration with the image taken by video camera 8), workpiece for measurement 6 is a rectangular-shape
Steel bar, when the equal continuous formation of top surface and left and right sides of steel bar, during defect without depression, projection etc, as shown in figure 3,
Operator stands when left front of the invention is seen, divides by the upper surface of the side of workpiece in workpiece top surface and isosceles right-angle prism 4
There is not a light bright line for red, wherein, the projection light bright line on workpiece top surface 1 is the first smooth bright line 100, workpiece left surface
Profile projection light bright line is the second smooth bright line 200, and the projection profiles light bright line of workpiece right flank 3 is the 3rd smooth bright line 300.Herein
It should be noted that because the position shared by operator is different with residing figure, causing human eye visual angle different, the light bright line
Can be observed the inside in isosceles right-angle prism 4 by the side of workpiece, and be in isosceles right-angled edge under most of visual angles
The inside of mirror 4 occurs, and light bright line on isosceles right-angle prism 4 presents down parallel distribution with the light bright line of workpiece top surface, according to
Visual angle and the difference of isosceles right-angle prism 4 and workpiece size, the first smooth bright line 100 of workpiece top surface 1 can be at top and also may be used
It is below.And this moment the position of the light bright line taken by video camera 8 as shown in figure 4, by visual angle now, the first smooth bright line
100 are located at the front side of the second smooth bright line 200 and the 3rd smooth bright line 300 near the position of video camera 8.No matter human eye or shooting
Machine 8 is with which kind of view, observed or photograph as long as defect of the above three surface of workpiece without depression or convex type
Three equal continuously smooths of light bright line it is free of discontinuities.And when detected workpiece surface has drawbacks described above, as shown in figure 5, work
There are pit 11, flange 12, workpiece right flank 3 fluted 31, projection 32, then correspondingly taken by video camera 8 on part top surface 1
Picture on there is breakpoint septal line as shown in Figure 6, corresponding light bright line interruption is discontinuous, the first 110 corresponding defects of broken string
At pit 11, at the second 120 corresponding defect flanges 12 of broken string, at the 3rd 310 corresponding defect grooves 31 of broken string, the 4th broken string 320
At correspondence defect projection 32.
When in use, workpiece can be moved with certain speed or camera movement is so as to the profile by detection is entirely needed
The light bright line that face is projected shoots imaging.And on profile is detected some dot or during linear character, a word line structure
The light bright line at that to be detected point/cable architecture can be only shot without relative movement between light source 7 and workpiece,
Certain this detection error is slightly bigger, is adapted to the qualitative detection of local configuration.
Further, the monocular various dimensions profile scan device possesses following Parameter Conditions：
Wherein, Δ h is the virtual image of the side surface of workpiece light bright line seen by prism with respect to isosceles right-angle prism base
Height.The smooth bright line 100 of projection light bright line first on workpiece top surface 1, profile projection light second light of bright line of workpiece left surface
Bright line 200, the three of the 3rd smooth bright line of projection profiles light bright line 300 of workpiece right flank 3 is in sustained height position, also will work
Three contour lines in face that part is not in same plane are projected on a face (on workpiece top surface 1) completely.Above-mentioned d is isosceles
The right angle edge lengths of right-angle prism 4, n is the refractive index of isosceles right-angle prism, and θ is the visual angle of video camera, LfFor workpiece with it is corresponding
Horizontal interval distance between the right-angle surface being vertically arranged described in side, this section of horizontal interval is unobstructed apart from interior spaciousness, is one section
Only there is the air gap of air dielectric, parameter LfPrimarily to when avoiding workpiece from being placed on objective table 5, workpiece two sides with
The right-angle surface that the two of isosceles right-angle prism 4 are vertically arranged interferes collision and sets, when workpiece is placed on 5 centre of objective table,
Positioned at the L in left sidefEqual to the L on right sidefValue, when workpiece both sides are in contact with the right-angle surface being vertically arranged, its Lf=0.
When the visual angle of human eye progressively rotates change to a direction, as shown in Figure 7 and Figure 8, it can be seen that isosceles right angle
Light bright line on prism 4 is progressively moved down, i.e., all of smooth bright line is moved down (conversely, anti-to the bottom of isosceles right-angle prism 4
To rotation human eye visual angle, above-mentioned smooth bright line gradually rises).Correspondingly, in above-mentioned change procedure, video camera 8 also does correspondingly
Visual angle rotates, the position moving process of taken light bright line as shown in figure 9, progressively move forward, to the mirror of video camera 8
Head direction is close to.The first smooth bright line 100, the second smooth bright line 200 and the 3rd smooth bright line 300 shown in Fig. 7-9 respectively have four articles,
When representing that visual angle is rotationally-varying respectively, the change location of light bright line, when Article 4 light bright line y is transformed to, the second smooth bright line 200
It is just coplanar contour with the first smooth bright line 100 with the 3rd smooth bright line 300；That is Δ h=H this moment, H are the upper surface phase of measured workpiece
Height for isosceles right-angle prism base (reaches the upper surface of light bright line that the profile of two sides casts out and measured workpiece
Contour requirement).Certainly, in practice, can determine whether as needed it is contour, or between light bright line height difference control
Within the scope of great.
Referring to Figure 13, derived for the above-mentioned parameter relational theory of contour design as follows：
1. the basis of contour design be the virtual image as obtained by looking side ways the object under high refractive index medium highly.
2. virtual image height is got based on light path overall length, and the actual optical path length of high refractive index medium and video camera 8
The equivalent optical path of video (virtual image) is different, the i.e. light path of the virtual imageWherein Lv for the virtual image optical path length (i.e. etc.
Effect air light path), Lm is actual optical path length in medium, and n is the refractive index of medium.
3. used in the present invention is 45 ° of isosceles right-angle prisms 4 of standard, and on the one hand optical path length Lm depends on being situated between in medium
Matter height and width in itself, on the other hand the visual angle to video camera is related, according to refractive index formula(n is refraction
Rate, θ is camera angles, is also equal to incidence angle, and δ is refraction angle), we can obtainDue to this hair
Bright camera angles θ is the formed angle of cross section rotation of the axis based on video camera 8 and two isosceles right-angle prisms 4,
Angle i.e. between the camera lens axis of video camera 8 and the cross section of isosceles right-angle prism 4, that is, equal to incidence angle θ, and it is vertical
When the end face of isosceles right-angle prism 4 is observed, the actual optical path length in prism is consistently equal to height (width) d of prism, so,
Around the actual optical path length that the end face (cross section) of isosceles right-angle prism 4 rotatesTherefore, the light path of the 2nd step virtual image
4. the equivalent air optical path length Lv for being obtained according to the 3rd step, we obtain position and the optical path length such as figure of the virtual image
13, now, this workpiece in 8 bottoms of shooting has improve the height of Δ h in video camera 8, and this height is and takes the photograph
Camera view angle theta is related again, i.e.,L in this formulafWorkpiece apart from prism both sides vertical plane it
Between air-gap width.It may be noted that Figure 13 show Lf=0 situation, i.e. workpiece both sides are connect with two right-angle surfaces of prism
Tactile, so.Herein, above formula isAnd consider that being detected workpiece should not abrade prism surface, so
Gap L f is left, now our design image height h should be with d-LfIt is equal, i.e. the height of the virtual image, then for video camera 8 and its camera lens
For, apart from the vertical right-angle surface L of prismfThe width at place be with the height of measured workpiece it is contour and equidistant, as shown in Figure 10.
Further, according to prism it is wide/d high and design gaps Lf, by formulaIt is counter to be pushed away
Calculate, can obtain the design angle of camera angles
Wherein, equally, θ is the visual angle of above-mentioned video camera, and H is the height of the upper surface apart from prism base of measured object, n
It is the refractive index of isosceles right-angle prism, d is the right angle edge lengths of isosceles right-angle prism 4, and video camera 8 is calculated using the formula
Mounting inclination angle degree, with the workpiece for meeting different light path overall lengths be observed surface have equal equivalent away from；It is used to solve
The object distance difference for being observed face of different light path overall lengths causes problem that can not be confocal, and causes being observed for different light path overall lengths
Surface has equally clearly picture quality and identical multiplication factor by same camera lens.In specific design, can root
According to flexible selection is needed calculated using the angle of inclination or change isosceles right-angle prism 4 for changing video camera 8 by above formula
Refractive index or height width size realize the dynamic detection speed and precision of video camera 8.
Further, as shown in figure 14, to be provided with one between two word line structure light sources 7 of isosceles right-angle prism 4 and flat
Convex cylindrical lens 13, the flat mirror of the piano convex cylindrical lens 13 is equal with the horizontally disposed right-angle surface of isosceles right-angle prism 7
OK, i.e., piano convex cylindrical lens 13 are parallel with horizontally disposed right-angle surface.The design is mainly for the word for having certain angle of divergence
Cable architecture light source 7, places a piano convex cylindrical lens, the piano convex cylindrical between the word line structure light source 7 of isosceles right-angle prism 4 and
Lens 13 are used to collimate the structure light for having certain angle of divergence or are carried out angle of divergence adjustment, so as to by isosceles right-angle prism
A 4 wordline projects light energy enables video camera to observe whole side completely to the workpiece base equal to or less than prism base
The profile in face, the scattering of the light for mainly being sent in view of a word line structure light source 7.
Reached except above-mentioned setting piano convex cylindrical lens in addition to above-mentioned purpose of design method, it is also possible in a word line structure light
Two diverging directions in source 7, as shown in figure 15, the position both sides close to isosceles right-angle prism 4 are respectively mounted speculum 14, and this is anti-
Mirror 14 is penetrated the light that a word line structure light source 7 sends can be reflexed on isosceles right-angle prism 4, speculum 14 and laser optical axis
Angle α is less than the half of the divergence angle beta of the light that laser is sent, and more than 0, i.e., 0<α<β/2.
Further, when the word line structure light source 7 for being used is for colored structures light source, that is, multiple color is included
Light time, in order that detection more it is accurate clearly, be respectively equipped with one in all right-angle surfaces of two isosceles right-angle prisms 4 and only allow one
The optical filtering (not shown) that the light of kind of color is passed through, and the color of light that two optical filterings are passed through is different.Or
Directly by the way that in two surface coatings of isosceles right-angle prism 4, the tunic only transmits the light of certain color, so as to realize colour filter work(
Energy.The design because, for the material for having certain transmitance, such as glass, the word line structure light is using monochromatic color knot
During structure light, surface reflection and opposite are thrown incoming light and all can all be observed by video camera by prism, it is difficult to distinguish them,
And the light of only workpiece surface reflection is completely only what we needed because of structural information, so to the two pieces of isosceles right-angled edges in left and right
Mirror 4 needs that the filter (light of a certain wavelength correspondence a certain kind color) of different wave length is respectively adopted, and makes two pieces of isosceles right-angle prisms 4
In the light injected be two kinds of different pure color light, while because the filter of opposite can be prevented transmitted through the different colours light for coming
Line and pass through this side same color reflection light so that the only complete surface reflection of message structure that receives of video camera
Line；Therefore, two optical filterings are respectively arranged on above two isosceles right-angle prisms 4 to filter light source, which type of color is realized
Entering also to only have the light of this color can solve the cross-interference issue that transmitted light is formed in opposite from it out.
Further, as shown in Figure 10-11, the objective table 8 is the rectangular cuboid bloom in cross section, described two
Individual isosceles right-angle prism 4 on the specular of the objective table 5, in order to determine the L at left and right sidesfIt is equal, it is easy to meter
Contour equidistant design is realized in calculation.
Further, the isosceles right-angle prism 4 is embedded in the mounting seat 9 of rectangular-shape, and institute is leaned in the mounting seat 9
The side for stating objective table 5 is provided with 45 degree of inclined planes, and the inclined-plane of the isosceles right-angle prism 4 is closely pasted with 45 degree of inclined planes
Close, to install isosceles right-angle prism 4, fastening bolt 10 can be also set on the outside of the end face of mounting seat 9, it is straight for holding out against isosceles
Angle prism 4, two right-angle surfaces being vertically arranged of isosceles right-angle prism 4 can also select to stretch out outside the mounting groove of mounting seat 9.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
The personage for knowing this technology all can carry out modifications and changes under without prejudice to spirit and scope of the invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete with institute under technological thought without departing from disclosed spirit such as
Into all equivalent modifications or change, should be covered by claim of the invention.
Claims (8)
1. a kind of monocular various dimensions profile scan device, it is characterised in that：Including two isosceles right-angle prisms and objective table；Each
One of right-angle surface of isosceles right-angle prism is vertically arranged, and the objective table is located between two right-angle surfaces being vertically arranged, and is treated
Detection workpiece is put into its contour surface in the vertical direction when on the objective table and does not stretch out the another of the isosceles right-angle prism
Right-angle surface；
Be provided with a word line structure light source directly over the objective table, the word line structure light source project straight down one
The light bright line of font is covered on workpiece for measurement；
The video camera being connected with PC ends is additionally provided with the upper front of the objective table, the camera of the video camera can shoot comprehensively
The image of the described smooth bright line on the isosceles right-angle prism and workpiece for measurement surface.
2. monocular various dimensions profile scan device according to claim 1, it is characterised in that：The monocular various dimensions profile is swept
Imaging apparatus possess following Parameter Conditions：
Wherein, Δ h=H, Δ h are the height of the virtual image with respect to isosceles right-angle prism base of the described smooth bright line seen by prism
Degree, H is the height of the upper surface relative to isosceles right-angle prism base of measured workpiece, and d is the right angle length of side of isosceles right-angle prism
Degree, n is the refractive index of isosceles right-angle prism, and θ is the visual angle of video camera, LfIt is that side surface of workpiece and corresponding side isosceles right-angle prism are erected
Horizontal interval distance between the straight right-angle surface for setting.
3. monocular various dimensions profile scan device according to claim 2, it is characterised in that：The monocular various dimensions profile is swept
Imaging apparatus can as follows design the visual angle of video camera：
4. monocular various dimensions profile scan device according to claim 2, it is characterised in that：Two isosceles right-angle prisms with
A piano convex cylindrical lens, the flat mirror and isosceles right-angle prism of the piano convex cylindrical lens are provided between one word line structure light source
Horizontally disposed right-angle surface is parallel.
5. monocular various dimensions profile scan device according to claim 4, it is characterised in that：The one word line structure light source is
Colored structures light source, one is respectively equipped between two isosceles right-angle prisms and the piano convex cylindrical lens and only allows a kind of color
The optical filtering that passes through of light, and the color of light that two optical filterings are passed through is different.
6. monocular various dimensions profile scan device according to claim 1, it is characterised in that：The left and right sides of the objective table
The right-angle surface that face is vertically arranged with isosceles right-angle prism two separates.
7. monocular various dimensions profile scan device according to claim 6, it is characterised in that：The isosceles right-angle prism is embedding
In in the mounting seat of rectangular-shape, the side in the mounting seat by the objective table is provided with 45 degree of inclined planes, and the isosceles are straight
The inclined-plane of angle prism is brought into close contact with 45 degree of inclined planes.
8. monocular various dimensions profile scan device according to claim 2, it is characterised in that：In two pieces of isosceles right-angle prisms
Both sides are separately installed with the speculum that can be reflexed to the light that a word line structure light source is projected on isosceles right-angle prism, described anti-
The angle for penetrating mirror and laser optical axis is α, and 0<α<β/2, β is the angle of divergence of a word line structure light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164252.1A CN106767537B (en) | 2017-03-20 | 2017-03-20 | A kind of monocular various dimensions profile scan device |
Applications Claiming Priority (1)
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