CN1869587A - Compact variable-diameter contact type spherical curvature radius measuring instrument - Google Patents
Compact variable-diameter contact type spherical curvature radius measuring instrument Download PDFInfo
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- CN1869587A CN1869587A CN 200610027945 CN200610027945A CN1869587A CN 1869587 A CN1869587 A CN 1869587A CN 200610027945 CN200610027945 CN 200610027945 CN 200610027945 A CN200610027945 A CN 200610027945A CN 1869587 A CN1869587 A CN 1869587A
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- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
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- 238000005259 measurement Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
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Abstract
A compact variable-diameter contact spherical curvature radius measuring instrument is composed of a length meter, a stepping motor, a driver, a microcomputer, a variable-diameter measuring ring and a base. It can be used to measure spherical curvature radius, planeness and arc profile. The measuring principle is that the rise of the spherical surface to be measured is measured by a length meter, a microcomputer calculates the radius of curvature of the spherical surface according to a formula, the microcomputer analyzes the size of the radius of the required measuring ring according to the requirement of measuring precision, the microcomputer controls a stepping motor to automatically change the size of the radius of the required measuring ring through a driver of the stepping motor, then the rise of the spherical surface to be measured is measured by the length meter, and the radius of curvature of the spherical surface with the required precision is calculated according to the formula. The device also has the characteristics of small volume, simple and compact structure, large change range of the radius of the measuring ring and high measuring precision.
Description
Technical field
The present invention relates to a kind of surveying instrument, especially a kind of compact reducable contact spherical curvature radius measuring instrument that is applicable to sphere element radius of curvature measurement.
Technical background
The sphere curvature radius surveying instrument is the surveying instrument of sphere element radius-of-curvature.Because accurate sphere element is one of element main in precision optical machinery, instrument and meter, aerospace equipment and the optics manufacturing, therefore the measurement of research and discussion high precision sphere curvature radius has very important realistic meaning.At present, sphere curvature radius mainly contains two kinds by metering system: a kind of is contactless, mainly is to utilize the optical interference method, for example utilize the Newton ring interference instrument of equal thickness interference principle, but it mainly measures the glass elements that some have direct reflection character.Another kind is a contact, is mainly " bending high chord length " method, and its measuring principle mainly is to measure rise by length gauge, and then calculates the radius-of-curvature of sphere element according to formula.Yet the surveying instrument to this contact carries out precision analysis as can be known, and measuring accuracy is along with the radius of surveying ring changes, and also the radius-of-curvature along with sphere element to be measured changes.The method that solves this contradiction at present is to prepare the survey ring of many cover different radiis, uses the survey ring of different radiuses at different sphere curvature radius to be measured and different measuring accuracy.Owing to begin to be rough estimate sphere curvature radius to be measured, make judgement then, select suitable survey ring for use, carefully survey again, and when measuring different sphere curvature radius to be measured, must select the survey ring of different radii for use, in the instrument use, just must constantly load and unload and change the survey ring of different radii like this, inevitably introduce a lot of stochastic errors and personal error, greatly reduced measuring accuracy.Therefore and the survey number of rings order of different radii is limited, has only the survey ring of a few cover radii fixuses, and when measuring sphere element to be measured, the measuring accuracy of sphere element to be measured that can not be all can both reach the full accuracy of institute's nominal.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency of above-mentioned technology formerly, and a kind of compact reducable contact spherical curvature radius measuring instrument device is provided, its survey ring change in radius precision height, and it is big to survey ring change in radius scope, and simple and compact for structure.It can instant playback sphere element to be measured radius-of-curvature and precision.It can analyze and judge precision, regulates automatically then to survey the ring radius and measure, can also take multiple measurements same sphere element, so that it reaches high measuring accuracy.In addition, owing to do not relate to the loading and unloading and the replacing of surveying ring, so reduced the influence that stochastic error and personal error are brought greatly.
The present invention is achieved through the following technical solutions:
A kind of compact reducable contact spherical curvature radius measuring instrument, it is characterized in that it is by length gauge, stepper motor, driver, microcomputer, but reducing is surveyed ring and pedestal is formed, but described reducing is surveyed ring and stepper motor is fixed on the pedestal, but described reducing is surveyed the formation of ring: centrosymmetric three pinion wheels that center gear wheel of installing in the cavity of a cylindrical survey toroidal shell body and periphery thereof are meshed with it, link to each other by the axle of shaft joint by the lower end that corresponding three connecting links are connected three arbitrary pinion shafts of fulcrum ball respectively at the upper surface of the axle upper end of described three pinion wheels and described survey toroidal shell body with described step motor, but survey installation one length gauge between the ring at this pedestal and reducing, this length gauge is by probe, sounding rod and body are formed, but the through hole that described sounding rod is surveyed the center of the center of ring and center gear wheel by reducing stretches out, this sounding rod is in the center of the equilateral triangle that three fulcrum ball lines are constituted, the probe of this sounding rod upper end is in the upper surface of surveying the toroidal shell body, this probe can vertically move with respect to sounding rod and body, the input end of described microcomputer connects the output terminal of length gauge, and the output terminal of this microcomputer is connected with described stepper motor through described driver.
The sounding rod of described length gauge is connected by the tensioning conical sleeve with surveying between the toroidal shell body.
Described microcomputer has corresponding data processing and TT﹠C software.
Go out the rise of sphere to be measured during measurement earlier by the length gauge preliminary surveying, calculate the radius-of-curvature of sphere to be measured then according to formula by microcomputer, carry out precision analysis by microcomputer again and calculate reaching the needed survey ring of precision radius of curvature dimensions size, rotate by the driver control stepper motor then.Thereby drive a pinion rotation of side, drive other two pinion rotation of center gear wheel and side again by this pinion wheel, connecting link and fulcrum ball because three pinion wheels of side are being connected, final three fulcrum balls rotate synchronously, thereby the center of the equilateral triangle that the sounding rod that has guaranteed length gauge is constituted at three fulcrum ball lines all the time, and reached the continually varying purpose of surveying the ring radius size.
The present invention has the following advantages:
1. but the present invention's reducing is surveyed simply compactness of ring structure, and physical dimension is little, and it is big to survey ring change in radius scope, surveys ring change in radius precision height.
2. can improve measuring accuracy by changing the radius of surveying ring when measuring, and can change survey ring radius according to the needs of measuring accuracy.
3. need not change when measuring and survey ring, easy to use, reduced the influence of stochastic error that cargo handling process brought and personal error greatly.
4. measuring instrument utilization of the present invention can instant playback sphere curvature radius to be measured size, and provide the measuring accuracy size, can also measure the radius of curvature dimensions of sphere to be measured according to the requirement of measuring accuracy.
Description of drawings
Fig. 1 is the structured flowchart of compact reducable contact spherical curvature radius measuring instrument of the present invention.
But Fig. 2 is the vertical view that reducing of the present invention is surveyed ring.
Fig. 3 looks cut-open view for the master of the mechanical body part of compact reducable contact spherical curvature radius measuring instrument of the present invention.
Fig. 4 is the A-A cut-open view of survey ring of the present invention.
Fig. 5 is the front view of the loam cake of survey toroidal shell body of the present invention.
Fig. 6 is the B-B cut-open view of the loam cake of survey toroidal shell body of the present invention.
Fig. 7 is the front view of the gear wheel of centre of the present invention.
Fig. 8 is the vertical view of the gear wheel of centre of the present invention.
Fig. 9 is the front view of tensioning conical sleeve of the present invention.
Figure 10 is the vertical view of tensioning conical sleeve of the present invention.
Figure 11 is the front view of length gauge of the present invention.
Figure 12 is the vertical view of length gauge of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
As seen from Figure 1, compact reducable contact spherical curvature radius measuring instrument of the present invention, but form by length gauge 7, stepper motor 6, driver 5, microcomputer 4 reducings survey ring and pedestal 11.See also Fig. 2, Fig. 3 and Fig. 4, but described reducing is surveyed ring and stepper motor 6 is fixed on the pedestal 11, it is center gear wheel 8 and the peripheral centrosymmetric first pinion wheel 1-1 that is meshed with it thereof that installs in the cavity of a cylindrical survey toroidal shell body 9 that but described reducing is surveyed the formation of ring, the second pinion wheel 1-2 and third pinion 1-3, at the described first pinion wheel 1-1, the axle upper end of the second pinion wheel 1-2 and third pinion 1-3 and the upper surface of described survey toroidal shell body 9 are respectively by corresponding head rod 2-1, the second connecting link 2-2, the 3rd connecting link 2-3 connects the first fulcrum ball 3-1, the second fulcrum ball 3-2, the 3rd fulcrum ball 3-3, the lower end of the axle of the described first pinion wheel 1-1 links to each other with the axle of described step motor 6 by shaft joint 10, but survey installation one length gauge 7 between the ring at this pedestal 11 and reducing, this length gauge 7 is by probe 7-1, sounding rod 7-2 and body 7-3 form, referring to Figure 11 and Figure 12, but the through hole that described sounding rod 7-2 surveys the center of the center of ring and center gear wheel 8 by reducing stretches out, this sounding rod 7-2 is in the center of the equilateral triangle that three fulcrum ball lines are constituted, the probe 7-1 of this sounding rod 7-2 upper end is in the upper surface of surveying toroidal shell body 9, this probe 7-1 can vertically move with respect to sounding rod 7-2 and body 7-3, the input end of described microcomputer 4 connects the output terminal of length gauge 7, and the output terminal of this microcomputer 4 is connected with described stepper motor 6 through described driver 5.
The sounding rod 7-2 of described length gauge 7 is connected by tensioning conical sleeve 12 with surveying between the toroidal shell body 9, referring to Fig. 9 and Figure 10.
Described microcomputer 4 has corresponding data processing software.
Because microcomputer 4, driver 5 are to be connected with data line with stepper motor 6, so microcomputer 4 can come step number, direction and the speed of control step motor 6 by driver 5.
Microcomputer 4 has two circuits to connect: the driver 5 of a connection stepper motor, so that give driver 5 output pulse signals, again by the rotation control signal of driver 5 by data line output stepper motor 6; Another connection length gauge 7 so that receive the measuring-signal of length gauge 7, is calculated the radius-of-curvature and the precision of sphere to be measured again according to formula by microcomputer 4.
Consult Figure 11, Figure 12, measuring element of the present invention is the incremental length gauge of German HEIDENHAIN company, selects the MT2500 in the HEIDENHAIN-METRO series length meter for use, and it is made up of probe 7-1, sounding rod 7-2, body 7-3.Probe 7-1 can move with respect to sounding rod 7-2 and body 7-3, and length gauge is by the next accurate Displacement Measurement of moving of probe 7-1.Consult Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, in physical construction of the present invention, ring is vertical to be placed length gauge 7 with respect to surveying, the sounding rod 7-2 of length gauge can be smoothly by center gear wheel 8 and the center of surveying toroidal shell body 9-1,9-2, this is to leave hole respectively because survey toroidal shell body 9-1, the centre of 9-2 and the centre of center gear wheel 8, like this, just can not interfere contradiction mutually between their physical construction.And connect by tensioning conical sleeve 12 between the sounding rod 7-2 of length gauge and survey toroidal shell body 9-1, the 9-2, like this, can guarantee verticality high between them, and the centralized positioning precision is very high.
The using method of instrument of the present invention is as follows:
Before use, at first regulate three first fulcrum ball 3-1, the second fulcrum ball 3-2, the 3rd fulcrum ball 3-3 and length gauge 7, school zero process is that the standard optical flat is positioned over the first fulcrum ball 3-1, the second fulcrum ball 3-2, on the 3rd fulcrum ball 3-3, the feasible probe 7-1 and the first fulcrum ball 3-1, the second fulcrum ball 3-2, the 3rd fulcrum ball 3-3 contacts the standard optical flat simultaneously, at this moment, their contact is just in the same plane, the reading that can establish length gauge 7 is zero, the step number initial value of stepper motor 6 is zero, so just finished school zero process, then sphere element to be measured is positioned over the first fulcrum ball 3-1, the second fulcrum ball 3-2, on the 3rd fulcrum ball 3-3, microcomputer 4 is regulated by driver 5 and stepper motor 6 and is surveyed the ring radius, making and surveying the ring radius size is a numerical value, measure rise by length gauge 7 and obtain first numerical value this moment, can calculate the initial value of the radius-of-curvature of sphere element to be measured like this by microcomputer 4, calculate the survey ring radius size size of needs then by microcomputer 4 according to the radius-of-curvature initial value of accuracy requirement and sphere element to be measured.Come control step motor 6 to rotate step number by microcomputer 4 by driver 5 again, make the first fulcrum ball 3-1, the second fulcrum ball 3-2 that is connected with stepper motor 6, the position that the 3rd fulcrum ball 3-3 arrives needed survey ring radius.At this moment measured by length gauge 7 again, obtain second rise numerical value, the pedometer that second rise numerical value that last microcomputer 4 can record according to length gauge 7 and stepper motor 6 are walked is calculated the numerical value of radius-of-curvature of the sphere element to be measured of required precision.
Physical dimension of the present invention is little, and is simple and compact for structure, and it is big to survey the ring radius, surveys ring change in radius precision height, and can measure the size of the radius-of-curvature of sphere element to be measured according to the requirement of measuring accuracy.In addition, also can become the repeatedly measurement of parameter, so just reduce in the measuring process stochastic error and personal error the influence of measuring accuracy to same sphere element.
Claims (3)
1, a kind of compact reducable contact spherical curvature radius measuring instrument, it is characterized in that it is by length gauge, stepper motor, driver, microcomputer, but reducing is surveyed ring and pedestal is formed, but described reducing is surveyed ring and stepper motor is fixed on the pedestal, but described reducing is surveyed the formation of ring: centrosymmetric three pinion wheels that center gear wheel of installing in the cavity of a cylindrical survey toroidal shell body and periphery thereof are meshed with it, link to each other by the axle of shaft joint by the lower end that corresponding three connecting links are connected three arbitrary pinion shafts of fulcrum ball respectively at the upper surface of the axle upper end of described three pinion wheels and described survey toroidal shell body with described step motor, but survey installation one length gauge between the ring at this pedestal and reducing, this length gauge is by probe, sounding rod and body are formed, but the through hole that described sounding rod is surveyed the center of the center of ring and center gear wheel by reducing stretches out, this sounding rod is in the center of the equilateral triangle that three fulcrum ball lines are constituted, the probe of this sounding rod upper end is in the upper surface of surveying the toroidal shell body, this probe can vertically move with respect to sounding rod and body, the input end of described microcomputer connects the output terminal of length gauge, and the output terminal of this microcomputer is connected with described stepper motor through described driver.
2, compact reducable contact spherical curvature radius measuring instrument according to claim 1, the sounding rod that it is characterized in that described length gauge are connected by the tensioning conical sleeve with surveying between the toroidal shell body.
3, compact reducable contact spherical curvature radius measuring instrument according to claim 1 is characterized in that described microcomputer has corresponding data processing software.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100279458A CN100398989C (en) | 2006-06-21 | 2006-06-21 | Compact variable-diameter contact type spherical curvature radius measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100279458A CN100398989C (en) | 2006-06-21 | 2006-06-21 | Compact variable-diameter contact type spherical curvature radius measuring instrument |
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| Publication Number | Publication Date |
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| CN1869587A true CN1869587A (en) | 2006-11-29 |
| CN100398989C CN100398989C (en) | 2008-07-02 |
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| CNB2006100279458A Expired - Fee Related CN100398989C (en) | 2006-06-21 | 2006-06-21 | Compact variable-diameter contact type spherical curvature radius measuring instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886921A (en) * | 2010-07-08 | 2010-11-17 | 西安工业大学 | Measurement method and measurement accessory for zero point calibration of gear measuring center |
| CN101750031B (en) * | 2009-12-09 | 2011-08-10 | 华中科技大学 | Method and device for measuring two-dimensional contour shape |
| CN102538716A (en) * | 2011-12-21 | 2012-07-04 | 西安北方捷瑞光电科技有限公司 | Eccentricity detecting method for spherical surface optic element with small caliber and large curvature |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86201617U (en) * | 1986-03-22 | 1987-04-08 | 沈阳 | Direct-reading micro-spherometer |
| JP3806268B2 (en) * | 1999-05-17 | 2006-08-09 | 日本航空電子工業株式会社 | Spherometer |
| CN1221777C (en) * | 2004-05-14 | 2005-10-05 | 中国科学院上海光学精密机械研究所 | Variable diameter contact type sphere diameter instrument |
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2006
- 2006-06-21 CN CNB2006100279458A patent/CN100398989C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750031B (en) * | 2009-12-09 | 2011-08-10 | 华中科技大学 | Method and device for measuring two-dimensional contour shape |
| CN101886921A (en) * | 2010-07-08 | 2010-11-17 | 西安工业大学 | Measurement method and measurement accessory for zero point calibration of gear measuring center |
| CN101886921B (en) * | 2010-07-08 | 2012-07-18 | 西安工业大学 | Measurement method and measurement accessory for zero point calibration of gear measuring center |
| CN102538716A (en) * | 2011-12-21 | 2012-07-04 | 西安北方捷瑞光电科技有限公司 | Eccentricity detecting method for spherical surface optic element with small caliber and large curvature |
| CN102538716B (en) * | 2011-12-21 | 2014-05-28 | 西安北方捷瑞光电科技有限公司 | Eccentricity detecting method for spherical surface optic element with small caliber and large curvature |
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| CN100398989C (en) | 2008-07-02 |
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Granted publication date: 20080702 Termination date: 20120621 |