CN101403609A - Method for non-contact workpiece angle measurement by using laser displacement transducer - Google Patents
Method for non-contact workpiece angle measurement by using laser displacement transducer Download PDFInfo
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- CN101403609A CN101403609A CNA2008100514353A CN200810051435A CN101403609A CN 101403609 A CN101403609 A CN 101403609A CN A2008100514353 A CNA2008100514353 A CN A2008100514353A CN 200810051435 A CN200810051435 A CN 200810051435A CN 101403609 A CN101403609 A CN 101403609A
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- laser displacement
- displacement sensor
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- measured
- dynamic device
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Abstract
The invention discloses a non-contact method for measuring a workpiece angle by adopting a laser displacement sensor, which belongs to an angle measurement method in the optoelectronic measurement technical field. The technical problem to be solved is to provide a method for carrying out non-contact measurement by adopting a laser displacement sensor. The technical program is as follows: first step, the measurement devices are established; second step, keeping appropriate distance between the grating ruler and the measured object to ensure that the distance between the measured point of the measured object and the laser displacement sensor is in the measuring range of the laser displacement sensor; third step, four measured point coordinate data of measured object surface one and surface two are substituted into the slope formula K=(Y1-Y2) /(X1-X2), the slope K1 and K2 are obtained, according to the slope K1 and K2, the angle tangent value between two surfaces can also be gained, tanTheta=(K1-K2)/(1+K1K2), therefore, the included angle Theta is solved; and a plurality of measured values can be used and averaged to improve the measuring precision.
Description
Technical field
The invention belongs to the method for a kind of measuring workpieces angle that relates in the photoelectric measurement technical field.
Background technology
Generally speaking, the method that generally adopts of the measurement of workpiece angle is a contact type measurement.For the complicated workpiece of shape, the angle measurement method of contact exists tangible limitation.Be subjected to the restriction of the size and dimension of surveying instrument own on the one hand, the complexity of measured workpiece also makes direct contact measurement be difficult to realize on the other hand, as the measurement of the angle between two faces in workpiece inside, the measurement of certain angle of complicated die etc., this is the problem that often runs in commercial Application and scientific research.
In existing technology, the prior art the most approaching with the present invention is: clinometer rule is generally adopted in conventional measurement of angle, as shown in Figure 1: comprise measured piece 1, clinometer rule 2, the using method of clinometer rule can find in many books.Workpiece for simple shape can directly adopt kind of calliper, and for the situation that clinometer rule can't be placed, can't measure.
Summary of the invention
In order to overcome the defective that prior art exists, the objective of the invention is to implement the measurement of angle to complex-shaped workpieces, ad hoc meter is a kind of to adopt the contactless method that workpiece angle is measured.
The technical problem to be solved in the present invention is: a kind of method that adopts laser displacement sensor to carry out non-contact workpiece angle measurement is provided.The technical scheme of technical solution problem is: the first step, set up measurement mechanism, as shown in Figure 2, this device comprises measured piece 3, grating chi scale 4, grating dynamic device 5, laser displacement sensor 6, processor 7, raster data capture card 8, first data line, 9, the second data lines 10, computing machine 11.
The grating chi is made up of grating chi scale 4 and grating dynamic device 5, grating dynamic device 5 can move along the length direction of grating chi scale 4, grating dynamic device 5 is connected with raster data capture card 8 by lead, and the output terminal of raster data capture card 8 is connected with the input end of computing machine 11 by first data line 9; Laser displacement sensor 6 is installed on the grating dynamic device 5, move with grating dynamic device 5, the measuring head of laser displacement sensor 6 is towards measured piece 3, the output terminal of laser displacement sensor 6 is connected with the input end of processor 7, and the output terminal of processor 7 is connected with the input end of computing machine 11 by second data line 10.Second step, make grating chi scale 4 and measured piece 3 keep suitable distance, the distance that makes measurement point on the measured piece 3 and laser displacement sensor 6 is in the range ability of laser displacement sensor, because laser displacement sensor 6 is installed on the grating dynamic device 5, measuring head aiming measured piece 3, when grating dynamic device 5 moves, the distance that the grating chi can Laser Measurement displacement transducer 6 moves, laser displacement sensor 6 can be measured the distance of measured piece 3 apart from laser displacement sensor 6, can read on the measured surface one of measured piece 32 position coordinates by the position of mobile grating dynamic device 5, i.e. (X
1, Y
1), (X
2, Y
2), and the position coordinates on 2 two on measured piece 3 surface, i.e. (X
3, Y
3), (X
4, Y
4).The 3rd step, four point coordinate data substitution slope formula K=(Y that measure on the measured surface one and surperficial two with measured piece 3
1-Y
2)/(X
1-X
2), obtain the slope K on measured piece 3 surfaces 1
1And the slope K on surface 2
2, according to slope K
1, K
2Can obtain the angle tangent value tg θ=(K on two surfaces
1-K
2)/(1+K
1K
2), angle theta can be obtained thus; In order to improve measuring accuracy, desirable a plurality of measured values also ask average with measurement result.
The principle of work explanation
Want the angle of two faces of measuring workpieces, according to dihedral angle definition, as long as measure in these two faces angle perpendicular to two straight lines of these two hand-deliver lines, this principle can find in the solid geometry textbook.And the measurement of the angle of conplane two straight lines can also be passed through formula tg θ=(K by the slope of measuring following two straight lines of the same coordinate system
1-K
2)/(1+K
1K
2) obtain.This formula is the formula that solves the actual techniques problem, is not the formula of intellection recreation.And, just can realize the measurement of the angle of two faces in the workpiece by the method that the inventor proposes.
Good effect of the present invention: the measurement mechanism of being set up row simple in structure, easy, measuring method is operated easily, can realize the non-cpntact measurement to angle between two faces of complex part.
Description of drawings
Fig. 1 is the instrument and equipment that measuring method adopted of prior art, with the synoptic diagram that concerns of measured piece
Fig. 2 is that the instrument and equipment that adopted in the measuring method of the present invention and the position of measured piece concern synoptic diagram
Embodiment
The present invention implements by the method step of stipulating in the technical scheme, wherein, in the measurement mechanism that the first step is set up, the grating chi is the SGC-K2S type grating chi that adopts Changchun Guangji Digital Display Technology Co., Ltd. to produce, raster data capture card 8 is the SGC-PC3.1 data collecting cards that adopt Changchun Guangji Digital Display Technology Co., Ltd. to produce, both are auxiliary products, and data are passed to Legend Kaitian 4600 computing machines 11 by first data line 9.The LK-501 type laser displacement sensor that the Japanese Keyence of laser displacement sensor 6 employings company produces.Laser displacement sensor 6 output simulating signals are by handling with the supporting LK-2501 type laser displacement sensor processor 7 of laser displacement sensor.And data are passed to Legend Kaitian 4600 computing machines 11 by second data line 10.Second step, the 3rd step implement by the method step of stipulating in the technical scheme.
Claims (1)
1, a kind of method that adopts laser displacement sensor to carry out non-contact workpiece angle measurement comprises measured piece, it is characterized in that the first step, sets up measurement mechanism; This device comprises grating chi scale (4), grating dynamic device (5), laser displacement sensor (6), processor (7), raster data capture card (8), first data line (9), second data line (10), computing machine (11); The grating chi is made up of grating chi scale (4) and grating dynamic device (5), grating dynamic device (5) can move along the length direction of grating chi scale (4), grating dynamic device (5) is connected with raster data capture card (8) by lead, and the output terminal of raster data capture card (8) is connected with the input end of computing machine (11) by first data line (9); Laser displacement sensor (6) is installed on the grating dynamic device (5), move with grating dynamic device (5), the measuring head of laser displacement sensor (6) is towards measured piece (3), the output terminal of laser displacement sensor (6) is connected with the input end of processor (7), and the output terminal of processor (7) is connected with the input end of computing machine 11 by second data line 10; Second step, make grating chi scale (4) and measured piece (3) keep suitable distance, the distance that makes measurement point on the measured piece (3) and laser displacement sensor (6) is in the range ability of laser displacement sensor, because laser displacement sensor (6) is installed on the grating dynamic device (5), measuring head aiming measured piece (3), when grating dynamic device (5) is mobile, the distance that the grating chi can Laser Measurement displacement transducer (6) moves, laser displacement sensor (6) can be measured the distance of measured piece (3) apart from laser displacement sensor (6), can read on the measured surface one of measured piece (3) 2 position coordinates by the position of mobile grating dynamic device (5), i.e. (X
1, Y
1), (X
2, Y
2), and the position coordinates on 2 two on measured piece (3) surface, i.e. (X
3, Y
3), (X
4, Y
4); The 3rd step, four point coordinate data substitution slope formula K=(Y that measure on the measured surface one and surperficial two with measured piece (3)
1-Y
2)/(X
1-X
2), obtain the slope K on measured piece (3) surface one
1And the slope K on surface two
2, according to slope K
1, K
2Can obtain the angle tangent value tg θ=(K on two surfaces
1-K
2)/(1+K
1K
2), angle theta can be obtained thus; In order to improve measuring accuracy, desirable a plurality of measured values also ask average with measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100514353A CN101403609A (en) | 2008-11-18 | 2008-11-18 | Method for non-contact workpiece angle measurement by using laser displacement transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100514353A CN101403609A (en) | 2008-11-18 | 2008-11-18 | Method for non-contact workpiece angle measurement by using laser displacement transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101403609A true CN101403609A (en) | 2009-04-08 |
Family
ID=40537692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100514353A Pending CN101403609A (en) | 2008-11-18 | 2008-11-18 | Method for non-contact workpiece angle measurement by using laser displacement transducer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837097A (en) * | 2012-11-23 | 2014-06-04 | 上海久点触控计算机系统股份有限公司 | Workpiece angle automatic measurement device based on image processing and measurement method thereof |
| CN104406518A (en) * | 2014-11-14 | 2015-03-11 | 中国科学院上海光学精密机械研究所 | Large size laser neodymium glass cladding size and angle non-contact detection device and method |
| CN104913742A (en) * | 2015-06-05 | 2015-09-16 | 天津大学 | Ray-cluster-based method for measuring included angle between two plane surface |
| CN105526885A (en) * | 2015-12-03 | 2016-04-27 | 郑州轻工业学院 | Taper hole cone angle high precision detection method based on composite probe |
| CN107238354A (en) * | 2017-07-27 | 2017-10-10 | 南京信息工程大学 | A kind of Angle Measuring Equipment and its measuring method based on PSD position sensors |
| CN109099859A (en) * | 2018-09-26 | 2018-12-28 | 中国科学院上海光学精密机械研究所 | Optical elements of large caliber surface defect apparatus for measuring three-dimensional profile and method |
| CN111215771A (en) * | 2020-03-04 | 2020-06-02 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Laser processing device and processing method |
-
2008
- 2008-11-18 CN CNA2008100514353A patent/CN101403609A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103837097A (en) * | 2012-11-23 | 2014-06-04 | 上海久点触控计算机系统股份有限公司 | Workpiece angle automatic measurement device based on image processing and measurement method thereof |
| CN103837097B (en) * | 2012-11-23 | 2016-12-21 | 上海久点触控计算机系统股份有限公司 | A kind of workpiece angle self-operated measuring unit based on image procossing and measuring method |
| CN104406518A (en) * | 2014-11-14 | 2015-03-11 | 中国科学院上海光学精密机械研究所 | Large size laser neodymium glass cladding size and angle non-contact detection device and method |
| CN104406518B (en) * | 2014-11-14 | 2017-01-25 | 中国科学院上海光学精密机械研究所 | Large size laser neodymium glass cladding size and angle non-contact detection device and method |
| CN104913742A (en) * | 2015-06-05 | 2015-09-16 | 天津大学 | Ray-cluster-based method for measuring included angle between two plane surface |
| CN104913742B (en) * | 2015-06-05 | 2018-01-12 | 天津大学 | A kind of measuring method of two plane included angles based on ray cluster |
| CN105526885A (en) * | 2015-12-03 | 2016-04-27 | 郑州轻工业学院 | Taper hole cone angle high precision detection method based on composite probe |
| CN105526885B (en) * | 2015-12-03 | 2018-06-15 | 郑州轻工业学院 | A kind of taper hole cone angle high-precision detecting method based on composite probe |
| CN107238354A (en) * | 2017-07-27 | 2017-10-10 | 南京信息工程大学 | A kind of Angle Measuring Equipment and its measuring method based on PSD position sensors |
| CN109099859A (en) * | 2018-09-26 | 2018-12-28 | 中国科学院上海光学精密机械研究所 | Optical elements of large caliber surface defect apparatus for measuring three-dimensional profile and method |
| CN111215771A (en) * | 2020-03-04 | 2020-06-02 | 北京半导体专用设备研究所（中国电子科技集团公司第四十五研究所） | Laser processing device and processing method |
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