CN103644841A - Location degree measurement method for circle center of inclined hole - Google Patents
Location degree measurement method for circle center of inclined hole Download PDFInfo
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- CN103644841A CN103644841A CN201310457380.7A CN201310457380A CN103644841A CN 103644841 A CN103644841 A CN 103644841A CN 201310457380 A CN201310457380 A CN 201310457380A CN 103644841 A CN103644841 A CN 103644841A
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Abstract
The invention discloses a location degree measurement method for the circle center of an inclined hole. The method comprises the following steps: (1.1) a checkerboard is selected as a calibration board; (1.2) calibration image capture is performed on a calibration board by using a calibration camera which is vertically arranged on a grating ruler mechanical platform to extract angular points and establish the mapping relation between image coordinates of the calibration camera and calibration board coordinates; (1.3) the grating ruler mechanical platform is moved in the horizontal X direction and Y direction to obtain the angular points at four different locations to obtain the absolute location; (1.4) the grating ruler mechanical platform is moved to establish the mapping relation between image coordinates of a first measuring camera and the calibration board coordinates, and the location of an image point on the first measuring camera in a mechanical coordinate system is obtained through conversion; (2.1) image capture is performed by using the first measuring camera, and values in the X and Y directions are acquired through calculation; (2.2) image capture is performed on the vertical surface direction of a hole to be detected by using a second measuring camera which is arranged horizontally, and the value in the Z direction is acquired through the acquired values in the X and Y directions.
Description
Technical field
The present invention relates to mechanical field, relate in particular to the position measurement method in a kind of inclined hole center of circle.
Background technology
The development of modern mechanical processing and manufacturing, engineering goods structure becomes increasingly complex, and the quality requirements of the inclined hole on product is corresponding raising also, and the position degree of inclined hole and the degree of accuracy of space angle directly have influence on the quality of product.Along with development of industrial systems, more and more higher to the requirement of position degree and spatial angle measuring and precision, measuring method and means also constantly promote.Be mainly, by three-coordinates measuring machine, data point scanning, image data point are carried out in test product surface at present, to obtain the three-dimensional of test product in spatial dimension, thereby obtain position degree and the space angle of inclined hole on product.
But three-coordinates measuring machine cost is higher and can not measure in batches, make enterprise's production cost higher; For reducing costs, there is the plug of employing conjunction measuring method, according to the design parameter of tested inclined hole, make corresponding plug, then use instrument to measure plug and indirectly obtain the related data of inclined hole, although this measuring method cost is lower, measuring accuracy is lower, and do not possess better adaptability, because the change in size of inclined hole is various, the supporting plug quantity that a rod is joined a hole is larger, and handling cost is higher, therefore, practicality is not strong.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of convenient, for the method for inclined hole position degree in measuring workpieces.
For addressing the above problem, the invention provides a kind of position measurement method for the inclined hole center of circle, it is characterized in that, comprise the following steps:
(1) demarcate, it comprises:
(1.1) choose gridiron pattern as scaling board;
(1.2) scaling board is lain in a horizontal plane in to measured place, use vertically disposed calibration for cameras on grating scale mechanical platform to demarcate capture to scaling board, extract angle point, can set up the image coordinate of calibration for cameras and the mapping relations of scaling board coordinate;
(1.3) along X-direction, the Y-direction moving grating chi mechanical platform of level, obtain the angle point of four diverse locations, can obtain the absolute position of this scaling board in mechanical coordinate system;
(1.4) moving grating chi mechanical platform, the first measurement camera that use is obliquely installed is to the capture of calibrating block mechanical calibrating, carry out after angle point extraction, set up the image coordinate of the first measurement camera and the mapping relations of scaling board coordinate, and by conversion, obtain the first picture point of measuring on camera, the position in mechanical coordinate system;
(2) measure, it comprises:
(2.1) take out scaling board, will treat that gaging hole is placed in measured place, use first to measure camera to its capture, by calculating, obtain the numerical value of X, Y-direction;
(2.2) second of usage level setting measure camera and treat gaging hole vertical plane direction and carry out capture, and obtain the numerical value of Z direction by the X having obtained, the numerical value of Y-direction.
As a further improvement on the present invention, when a workpiece is provided with a plurality of described inclined hole, the first measurement camera and second identical with described inclined hole quantity is set and measures camera, and corresponding one by one with each inclined hole respectively, during use, first inclined hole described in each is successively carried out to step (1), carry out afterwards step (2) simultaneously.
The invention solves the defect existing in background technology, method is simple, easy to operate, cost is low, practical, precision is high, position degree that can an inclined hole of independent measurement, also can workpiece of measure batch in the position degree of a plurality of inclined holes.
Embodiment
Below the present invention is described in further details.
Embodiment mono-:
The present embodiment comprises the pedestal that can move along Y-axis, with be arranged on the crossbeam (grating scale mechanical platform) that can move in the X-axis direction on pedestal, during measurement, workpiece is fixed on to the upper surface of pedestal, now, on this workpiece, the position at each inclined hole place is measured position, this enforcement from also comprise: a calibration for cameras, is vertically fixed on crossbeam; One first measures camera, is arranged on crossbeam, and can rotates relative to crossbeam; One second measures camera, is horizontally disposed with, and this second camera lens of measuring camera points to measured position.The present embodiment concrete steps are as follows:
(1) choose gridiron pattern as scaling board;
(2) by scaling board horizontal positioned by side position, move horizontally crossbeam and make calibration for cameras over against scaling board, thereby scaling board is demarcated to capture, extract angle point, can set up the image coordinate of calibration for cameras and the mapping relations of scaling board coordinate;
(3) along Y-axis or X-direction, moving beam or pedestal, obtain the angle point of four diverse locations of scaling board, can obtain the absolute position of this scaling board in mechanical coordinate system;
(4) moving beam, the first measurement camera that use is obliquely installed is to the capture of calibrating block mechanical calibrating, carry out after angle point extraction, set up the image coordinate of the first measurement camera and the mapping relations of scaling board coordinate, and by conversion, obtain the first picture point of measuring on camera, the position in mechanical coordinate system;
(5) take out scaling board, workpiece is placed on pedestal, make inclined hole to be measured aim at measured position, first measures camera carries out capture to inclined hole, by calculating, obtains the X in the inclined hole center of circle, the numerical value of Y-direction;
(6) second of usage level setting the measurement camera carries out capture to inclined hole vertical plane direction, and obtains the numerical value of inclined hole center of circle Z direction by the X having obtained, the numeral of Y-direction.
Embodiment bis-:
The present embodiment comprises the pedestal that can move along Y-axis, with be arranged on the crossbeam (grating scale mechanical platform) that can move in the X-axis direction on pedestal, during measurement, workpiece is fixed on to the upper surface of pedestal, now, on this workpiece, the position at each inclined hole place is measured position, in the present invention, also comprises: calibration for cameras, is vertically fixed on crossbeam; First measures camera, is arranged on crossbeam, and can rotates relative to crossbeam, and its number is greater than or equal to the inclined hole number of workpiece; Second measures camera, is horizontally disposed with, and its number is greater than or equal to the inclined hole number of workpiece, and each second camera lens of measuring camera all points to measured position.The present embodiment concrete steps are as follows:
(1) choose gridiron pattern as scaling board;
(2) scaling board is lain in a horizontal plane in to one of them by side position, moving horizontally crossbeam makes calibration for cameras over against scaling board, thereby scaling board is demarcated to capture, extract angle point, can set up the image coordinate of calibration for cameras and the mapping relations of scaling board coordinate;
(3) along Y-axis or X-direction, moving beam or pedestal, obtain the angle point of four diverse locations of scaling board, can obtain the absolute position of this scaling board in mechanical coordinate system;
(4) moving beam, the first measurement camera that use is obliquely installed is to the capture of calibrating block mechanical calibrating, carry out after angle point extraction, set up the image coordinate of the first measurement camera and the mapping relations of scaling board coordinate, and by conversion, obtain the first picture point of measuring on camera, the position in mechanical coordinate system;
(5) scaling board is placed on successively on other three measured positions, repeating step 2-4, obtains other three first picture point of measuring on camera, the position in mechanical coordinate system;
(6) take out scaling board, workpiece is placed on pedestal, make each inclined hole to be measured aim at measured position, measure camera for four first and each self-corresponding inclined hole is carried out to capture simultaneously, by calculating, obtain the X in the inclined hole center of circle, the numerical value of Y-direction;
Use four horizontally disposed the second measurement cameras to carry out capture to its corresponding inclined hole vertical plane direction, and obtain the numerical value of inclined hole center of circle Z direction by the X having obtained, the numeral of Y-direction.
Claims (2)
1. for the position measurement method in the inclined hole center of circle, it is characterized in that, comprise the following steps:
(1) demarcate, it comprises:
(1.1) choose gridiron pattern as scaling board;
(1.2) scaling board is lain in a horizontal plane in to measured place, use vertically disposed calibration for cameras on grating scale mechanical platform to demarcate capture to scaling board, extract angle point, can set up the image coordinate of calibration for cameras and the mapping relations of scaling board coordinate;
(1.3) along X-direction, the Y-direction moving grating chi mechanical platform of level, obtain the angle point of four diverse locations, can obtain the absolute position of this scaling board in mechanical coordinate system;
(1.4) moving grating chi mechanical platform, the first measurement camera that use is obliquely installed is to the capture of calibrating block mechanical calibrating, carry out after angle point extraction, set up the image coordinate of the first measurement camera and the mapping relations of scaling board coordinate, and by conversion, obtain the first picture point of measuring on camera, the position in mechanical coordinate system;
(2) measure, it comprises:
(2.1) take out scaling board, will treat that gaging hole is placed in measured place, use first to measure camera to its capture, by calculating, obtain the numerical value of X, Y-direction;
(2.2) second of usage level setting measure camera and treat gaging hole vertical plane direction and carry out capture, and obtain the numerical value of Z direction by the X having obtained, the numerical value of Y-direction.
2. a kind of position measurement method for the inclined hole center of circle according to claim 1, it is characterized in that, when a workpiece is provided with a plurality of described inclined hole, the first measurement camera and second identical with described inclined hole quantity is set and measures camera, and corresponding one by one with each inclined hole respectively, during use, first inclined hole described in each is successively carried out to step (1), carry out afterwards step (2) simultaneously.
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| CN201310457380.7A CN103644841A (en) | 2013-09-30 | 2013-09-30 | Location degree measurement method for circle center of inclined hole |
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| CN201310457380.7A CN103644841A (en) | 2013-09-30 | 2013-09-30 | Location degree measurement method for circle center of inclined hole |
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Cited By (1)
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| CN109297408A (en) * | 2018-10-05 | 2019-02-01 | 苏州佳裕达自动化科技有限公司 | The high-speed automated detection any hole of accurate device is to aperture thread and the dedicated unit of position degree |
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| CN109297408A (en) * | 2018-10-05 | 2019-02-01 | 苏州佳裕达自动化科技有限公司 | The high-speed automated detection any hole of accurate device is to aperture thread and the dedicated unit of position degree |
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Application publication date: 20140319 |