CN103791851A - Non-contact three-dimensional object measuring method and device - Google Patents
Non-contact three-dimensional object measuring method and device Download PDFInfo
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- CN103791851A CN103791851A CN201210549246.5A CN201210549246A CN103791851A CN 103791851 A CN103791851 A CN 103791851A CN 201210549246 A CN201210549246 A CN 201210549246A CN 103791851 A CN103791851 A CN 103791851A
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Abstract
A non-contact three-dimensional object measuring method and device. The non-contact three-dimensional object measuring method comprises the following steps. A three-dimensional contour model of a three-dimensional object is provided. And establishing an image capturing path according to the three-dimensional contour model. According to the image capturing path, an image extracting unit extracts a two-dimensional image of the three-dimensional object. Drawing a two-dimensional profile model on the two-dimensional image, or measuring the size of the two-dimensional image. The two-dimensional contour model is established according to the image capturing path and the three-dimensional contour model.
Description
Technical field
The present invention relates to a kind of three-dimensional object measuring method and device, and be particularly related to a kind of non-contact 3-D object measuring method and device.
Background technology
Flourish along with industry, the detection mode of conventional two-dimensional cannot meet complicated three-D object to be measured, therefore at present also has on the market a kind of three-dimensional measuring instrument to carry out the measurement of this complicated determinand.In general, three-dimensional measuring instrument adopts contact type measurement.The three-dimensional measuring instrument of contact is directly to utilize probe contact measured thing to carry out measurement size, and the shortcoming of this kind of mode is that speed is slow and have a doubt on injury determinand surface.
Summary of the invention
The present invention relates to a kind of non-contact 3-D object measuring method and device, it utilizes non-contacting mode to carry out the measurement of three-dimensional object.
According to an aspect of the present invention, a kind of non-contact 3-D object measuring method is proposed.Non-contact 3-D object measuring method comprises the following steps.One three-D profile model of one three-dimensional object is provided.According to three-D profile model, set up a capture path.According to capture path, extract a two dimensional image of three-dimensional object with an image extraction unit.On two dimensional image, draw the size of a two-dimensional silhouette model or measurement two dimensional image.Two-dimensional silhouette model is set up according to capture path and three-D profile model.
According to a further aspect in the invention, a kind of non-contact 3-D object measurement mechanism is proposed.Non-contact 3-D object measurement mechanism comprises a storage unit, a processing unit, an image extraction unit, a mobile unit and a display unit.One three-D profile model of cell stores one three-dimensional object.Processing unit is set up a capture path according to three-D profile model or is measured the size of a two dimensional image of three-dimensional object.Mobile unit is in order to according to capture path movement image extraction unit, so that image extraction unit is extracted the two dimensional image of three-dimensional object.Display unit is in order to show two dimensional image.Processing unit is drawn a two-dimensional silhouette model or is measured the size of this two dimensional image on two dimensional image.Processing unit, according to capture path and three-D profile model, is set up two-dimensional silhouette model.
For foregoing of the present invention can be become apparent, various embodiment cited below particularly, and coordinate accompanying drawing, be described in detail below:
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of the non-contact 3-D object measurement mechanism of the first embodiment.
Fig. 2 illustrates the process flow diagram of the non-contact 3-D object measuring method of the first embodiment.
Fig. 3 illustrates the schematic diagram at another visual angle of the three-dimensional object of Fig. 1.
Fig. 4 illustrates the schematic diagram of the two dimensional image of the three-dimensional object of the first embodiment.
Fig. 5 illustrates the schematic diagram of the two dimensional image of the second embodiment.
Fig. 6 A illustrates the schematic diagram of the two-dimensional silhouette model of the 3rd embodiment.
Fig. 6 B illustrates the schematic diagram of the two dimensional image of the 3rd embodiment.
[main element symbol description]
1000: non-contact 3-D object measurement mechanism
110: storage unit
120: processing unit
130: image extraction unit
140: mobile unit
150: display unit
700: mesh lines
800: two dimensional image
800c: graphic based point
900: three-dimensional object
930: three-D profile model
930a: model-based on schedule
D1: length
D700a, D700b: spacing
S101, S102, S103, S104, S105: process step
X, Y, Z, θ: axially
θ 1: angle
Embodiment
Below propose various embodiment and be elaborated, embodiment is only in order to as example explanation, scope that can't limit wish protection of the present invention.In addition, the accompanying drawing clipped element in embodiment, shows technical characterstic of the present invention to know.
The first embodiment
Please refer to Fig. 1, it illustrates the schematic diagram of the non-contact 3-D object measurement mechanism 1000 of the first embodiment.Three-dimensional object measurement mechanism 1000 comprises a storage unit 110, a processing unit 120, an image extraction unit 130, a mobile unit 140 and a display unit 150.Storage unit 110 in order to store various data, for example, is a hard disk, a storer or a CD.Processing unit 120 in order to carry out various computings and handling procedure, for example, is a picture processing chip, a micro-chip processor, a firmware circuitry or a recording medium of storing several program codes.Image extraction unit 130 in order to extract an image, for example, is a camera, a video camera or the handheld electronic device with camera lens.Mobile unit 140 moves some object with automatic technology.Mobile unit 140 is for example robotic arm, track equipment, rotation platform, Suspenoing apparatus or its combination.Display unit 150 in order to export various pictures, for example, is display screen, draught machine or printing machine.
The present embodiment carries out the non-contact measurement of three-dimensional object 900 by above-mentioned various elements, whether meet predetermined dimension with length, angle and the profile of comparing out three-dimensional object 900.In measuring process, three-dimensional object 900 need not be contacted by any plant equipment or probe.
Please refer to Fig. 2, it illustrates the process flow diagram of the non-contact 3-D object measuring method of the first embodiment.In the present embodiment, as an example of the non-contact 3-D object measurement mechanism 1000 of Fig. 1 example, this process step is described.
In step S101, provide a three-D profile model of three-dimensional object 900 with storage unit 110.Three-D profile model is for example by computer aided design software (Computer Aided Design, CAD) institute's construction.Three-D profile model has comprised the profile of each position at various visual angles.Please refer to Fig. 1 and Fig. 3, Fig. 3 illustrates the schematic diagram at another visual angle of the three-dimensional object 900 of Fig. 1.Two kinds of visual angles of three-dimensional object 900 are illustrated in respectively Fig. 1 and Fig. 3.Certain position and certain visual angle of specified three-dimensional object 900 that is to say, as long as can obtain corresponding two-dimensional silhouette model.
In step S102, processing unit 120, according to three-D profile model, is set up a capture path.Capture path can be the sequenced collection of multiple capture points, can be also single capture point.In the time of three-dimensional object small volume, capture path can be single capture point; Larger at three-dimensional object volume, capture path can be multiple capture points.The setting in capture path comprise a three-dimensional capture position (X-axis, Y-axis, Z axis position that image acquiring apparatus is located) and a θ axial.
In another embodiment, the setting in capture path also comprises a capture scope.In the situation that image extraction unit 130 has zoom lens, capture scope can be controlled by the optical focal distance setting system of image extraction unit 130 or digital zoom system.In the time that the fineness of measuring is had relatively high expectations, can dwindle capture scope, so that the image of thin portion can be exaggerated.In the time that the area requirement of measuring is wider, can amplify capture scope, so that image can be extracted on a large scale.
In step S103, image extraction unit 130 is illustrated in the display unit 150 of Fig. 1 and Fig. 4 according to a two dimensional image 800(of capture path extraction three-dimensional object 900).In the present embodiment, mobile unit 140 can move image extraction unit 130 towards three moving directions, for example, be X axis, Y-axis and Z-axis direction, so that image extraction unit 130 can be moved to the three-dimensional capture position defining.Mobile unit 140, except can mobile image extraction unit 130, can also utilize θ axial-rotation image extraction unit 130, so that image extraction unit 130 is towards the three-dimensional capture direction defining.Thus, image extraction unit 130 can be aimed at the part that 900 wishs of three-dimensional object are measured.
In another embodiment, processing unit 120 can also be controlled the zoom lens of image extraction unit 130, so that image extraction unit 130 can correspond to the capture scope defining.
Please refer to Fig. 4, it illustrates the schematic diagram of the two dimensional image 800 of the three-dimensional object 900 of the first embodiment.In step S104, processing unit 120 is measured the size of two dimensional image 800 on two dimensional image 800, for example, be length D1.
In step S105, processing unit 120 is drawn a mesh lines 700 on two dimensional image 800.All space D 700a, the D700b of mesh lines 700 can be identical in fact; Or the space D 700a of mesh lines 700 can be different from the space D 700b of mesh lines 700; Or can be incomplete same between the space D 700a of mesh lines 700; Or can be incomplete same between the space D 700b of mesh lines 700.By automatically presenting of mesh lines 700, user also easily summary measure the size (being for example length D1) of two dimensional image 800.
In another embodiment, also can not perform step S105, and directly automatically be measured to calculate the size (being for example length D1) of two dimensional image 800 by processing unit 120.
In addition, step S105 can carry out after step S103 or carry out after step S104; Or S104 carries out simultaneously with step.
By above-mentioned non-contact 3-D object measuring method and device 1000, need not contact the surface of three-dimensional object 900, can avoid the surface of three-dimensional object 900 by scratch.And in measuring process, only needing to extract two dimensional image 800 can compare, and need not carry out mechanical entity measuring, and measuring speed can be accelerated.
The second embodiment
Please refer to Fig. 5, it illustrates the schematic diagram of the two dimensional image 800 of the second embodiment.The present embodiment and the first embodiment difference are the size that two dimensional image 800 is measured, no longer repeated description of all the other something in common.
In the present embodiment, processing unit 120 can directly be measured the angle θ 1 of two dimensional image 800, and need not contact the surface of three-dimensional object 900, can avoid the surface of three-dimensional object 900 by scratch.And in measuring process, only needing to extract two dimensional image 800 can compare, and need not carry out mechanical entity measuring, and measuring speed can be accelerated.
The 3rd embodiment
Please refer to Fig. 6 A～Fig. 6 B, Fig. 6 A illustrates the schematic diagram of the two-dimensional silhouette model 930 of the 3rd embodiment, and Fig. 6 B illustrates the schematic diagram of the two dimensional image 800 of the 3rd embodiment.The step that the present embodiment and the first embodiment difference are to draw two-dimensional silhouette model 930, no longer repeated description of all the other something in common.
As shown in Figure 6A, two-dimensional silhouette model 930 is illustrated in Fig. 1 for three-dimensional object 900() an outline line.Two-dimensional silhouette model 930 has model-based 930a on schedule, two dimensional image 800 has a graphic based point 800c, the step S104(that draws two-dimensional silhouette model 930 on two dimensional image 800 is illustrated in Fig. 2) in, overlay model reference point 930a and graphic based point 800c, so that two-dimensional silhouette model 930 is drawn on the opposite position of two dimensional image 800.
Due to two-dimensional silhouette model 930 with two dimensional image 800 all corresponding to identical three-dimensional capture position, three-dimensional capture direction and capture scope, two-dimensional silhouette model 930 should be able to coincide with two dimensional image 800 in theory.
Processing unit 120 can be compared for two dimensional image 800 and two-dimensional silhouette model 930, go out the difference of two dimensional image 800 and two-dimensional silhouette model 930 with automatic analysis, and need not contact the surface of three-dimensional object 900, can avoid the surface of three-dimensional object 900 by scratch.And in measuring process, only needing to extract two dimensional image 800 can compare, and need not carry out mechanical entity measuring, and measuring speed can be accelerated.
In sum, although the present invention with various embodiment openly as above, so it is not in order to limit the present invention.Those skilled in the art of the invention without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on appended claims confining spectrum.
Claims (20)
1. a non-contact 3-D object measuring method, comprising:
One three-D profile model of one three-dimensional object is provided;
According to this three-D profile model, set up a capture path;
According to this capture path, extract a two dimensional image of this three-dimensional object with an image extraction unit; And
On this two dimensional image, draw a two-dimensional silhouette model or measure the size of this two dimensional image, this two-dimensional silhouette model is set up according to this capture path and this three-D profile model.
2. non-contact 3-D object measuring method as claimed in claim 1, wherein setting up in the step in this capture path, this capture path comprises a three-dimensional capture position and a three-dimensional capture direction.
3. non-contact 3-D object measuring method as claimed in claim 2, wherein setting up in the step in this capture path, this capture path also comprises a capture scope.
4. non-contact 3-D object measuring method as claimed in claim 1, also comprises:
On this two dimensional image, draw a mesh lines.
5. non-contact 3-D object measuring method as claimed in claim 4, wherein, in the step of this mesh lines of drafting, the spacing of this mesh lines is identical in fact.
6. non-contact 3-D object measuring method as claimed in claim 1, wherein this two-dimensional silhouette model has a model-based on schedule, this two dimensional image has a graphic based point, on this two dimensional image, draw in the step of this two-dimensional silhouette model, be overlapping this model-based on schedule and this graphic based point so that this two-dimensional silhouette modeling rendering is in the opposite position of this two dimensional image.
7. non-contact 3-D object measuring method as claimed in claim 1, wherein, in the step of size of measuring this two dimensional image, the size of this two dimensional image comprises length.
8. non-contact 3-D object measuring method as claimed in claim 1, wherein, in the step of size of measuring this two dimensional image, the size of this two dimensional image comprises angle.
9. non-contact 3-D object measuring method as claimed in claim 1, wherein setting up in the step of this two-dimensional silhouette model, this two-dimensional silhouette model comprises an outline line of this three-dimensional object.
10. a non-contact 3-D object measurement mechanism, comprising:
One storage unit is a three-D profile model of storage one three-dimensional object;
One processing unit, sets up a capture path or measures the size of a two dimensional image of this three-dimensional object according to this three-D profile model;
One image extraction unit;
One mobile unit, in order to according to this this image extraction unit of capture path movement, so that this image extraction unit is extracted a two dimensional image of this three-dimensional object; And
One display unit, in order to show this two dimensional image, this processing unit is drawn a two-dimensional silhouette model or is measured the size of this two dimensional image on this two dimensional image, and this processing unit, according to this capture path and this three-D profile model, is set up this two-dimensional silhouette model.
11. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein this capture path comprises a three-dimensional capture position and a three-dimensional capture direction.
12. non-contact 3-D object measurement mechanisms as claimed in claim 11, wherein this capture path also comprises a capture scope.
13. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein this processing unit is more drawn a mesh lines on this two dimensional image.
14. non-contact 3-D object measurement mechanisms as claimed in claim 13, wherein the spacing of this mesh lines is identical in fact.
15. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein this two-dimensional silhouette model has a model-based on schedule, this two dimensional image has a graphic based point, overlapping this model-based of this processing unit on schedule and this graphic based point so that this two-dimensional silhouette modeling rendering is in the opposite position of this two dimensional image.
16. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein the size of this two dimensional image comprises length.
17. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein the size of this two dimensional image comprises angle.
18. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein this two-dimensional silhouette model comprises an outline line of this three-dimensional object.
19. non-contact 3-D object measurement mechanisms as claimed in claim 10, wherein this mobile unit is in order to move this image extraction unit towards three moving directions.
20. non-contact 3-D object measurement mechanisms as claimed in claim 19, wherein this mobile unit is also in order to swing or to rotate this image extraction unit.
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| TW101140096 | 2012-10-30 | ||
| TW101140096A TWI472711B (en) | 2012-10-30 | 2012-10-30 | Method and device for measuring 3-d article without contacting |
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| CN109540030A (en) * | 2018-11-27 | 2019-03-29 | 中国船舶重工集团公司第十二研究所 | A kind of handheld scanning device self poisoning accuracy checking method |
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| TW201416640A (en) | 2014-05-01 |
| TWI472711B (en) | 2015-02-11 |
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