CN101776439A - Variable light path laser length measuring machine - Google Patents
Variable light path laser length measuring machine Download PDFInfo
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- CN101776439A CN101776439A CN 201010108082 CN201010108082A CN101776439A CN 101776439 A CN101776439 A CN 101776439A CN 201010108082 CN201010108082 CN 201010108082 CN 201010108082 A CN201010108082 A CN 201010108082A CN 101776439 A CN101776439 A CN 101776439A
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- light path
- length
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- Instruments For Measurement Of Length By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a variable light path laser length measuring machine, and belongs to a length measuring instrument. A measuring mirror (5) of a laser measuring system is fixed on a measuring axis of a movable headstock (6); and an interference mirror (8) and a laser head (9) are fixed on a movable pulley (11). In a measuring process, the interference mirror and the laser head can be adjusted to a position nearest to the headstock according to the length of a measured size, so a shortest measuring light path can be achieved whether to measure a long part or a short part. Therefore, a measuring error and an unstable measuring result caused by environmental change in the measuring process can be reduced to the largest extent, and the measuring accuracy of the laser length measuring machine is greatly enhanced.
Description
Technical field: the present invention relates to length-measuring instrument, particularly a kind of variable light path laser length measuring machine.
Background technology: laser length measuring machine is used to measure the length dimension of big machinery part and measurer.Owing to adopt interference of light principle and meet Abbe measurement principle as measuring basis and design with optical maser wavelength, therefore have the characteristics of resolution height, measuring accuracy height, measurement range length, in big machinery manufacturing industry and national quality testing department, be widely adopted.
Therefore the conventional laser gauging machine meets Abbe and measures principle because the measuring beam of laser is disposed on the extended line of tested length dimension.In order to obtain long as far as possible measurement range, laser head and interference mirror are fixed on the distal-most end of base, can have the largest motion space so that measure the headstock between tailstock and interference mirror.Laser beam is called as from the geometry distance of interference mirror arrival measurement mirror and the product of air refraction: measure light path.Because laser beam is propagated in air dielectric, air refraction can be subjected to such environmental effects such as temperature, air pressure, humidity and RQ rough air, in measuring process, if these environmental factors change, will bring measuring error and measurement result instability, it is long more to measure light path, influences serious more.Therefore, measured piece is short more, and it is just long more to measure light path, is subjected to the environmental factor variable effect just big more; And measured piece is long more, and it is just short more to measure light path, is subjected to the environmental factor variable effect just more little.According to ISO dimensional tolerence standard, the object of same accuracy class, size is more little, and tolerance is just strict more; Size is big more, and tolerance is just loose more, and the error rule of conventional laser gauging machine is just in time opposite with size tolerance requirements.In order to guarantee the measuring accuracy of all measured pieces, the gauger has to measurement environment is proposed harsh more requirement, has strengthened the measurement cost virtually.
Summary of the invention: the object of the present invention is to provide a kind of variable light path laser length measuring machine, utilize this gauging machine can reduce environmental change brings in the measuring process the measuring error and the instability of measurement result to the full extent, the measuring accuracy of laser length measuring machine is increased substantially.
Formation of the present invention: comprise base, tailstock, worktable, the headstock and coaster, the interference mirror of laser measurement system and laser head are fixed on the coaster, laser measurement light beam and head, tail frame two touch and survey the measurement axis coaxle that end constitutes; Measure mirror and be fixed on the measurement axis of the headstock, set the rough position of the headstock before the measurement earlier according to the nominal length of measured size, movable block is also fixing to the position nearest apart from the headstock again, measures then.
Compared with the prior art, the present invention is fixed on interference mirror and laser head on the coaster that can move along base rail.Before the measurement, set the rough position of the headstock earlier according to the nominal length of measured size, movable block is also fixing to the position nearest apart from the headstock again, measures then.Like this, no matter measuring long and short part can both make the measurement light path the shortest.Thereby can reduce the instability that environmental change in the measuring process brings measuring error and measurement result to the full extent, the measuring accuracy of laser length measuring machine is increased substantially.
Before measured piece is installed, the mobile headstock of elder generation, making head, tail frame two touch the survey end contacts, set up measuring point, this moment, laser beam was called as to the geometry distance of measuring mirror and the product of air refraction from interference mirror: initial light path, this light path is subjected to factor affecting such as temperature, air pressure, humidity and disturbing flow equally.But because measured piece is short more, initial light path is just short more, is subjected to the environmental factor variable effect just more little; And measured piece is long more, and initial light path is just long more, is subjected to the environmental factor variable effect just big more, and this rule and ISO dimensional tolerence standard-required just in time are complementary.
Description of drawings: accompanying drawing is a structural representation of the present invention.
1. tailstocks among the figure 2. touch and survey end, 3. measured piece, and 4. worktable is 5. measured mirror, and 6. the headstock is 7. measured light path, 8. interference mirror, 9. laser head, 10. base, 11. coasters, RQ rough air.
Embodiment: 1) the maximum measurement range that will reach, the length of design base 10 according to the occupy-place length and the gauging machine of tailstock 1, the headstock 6, coaster 11.Tailstock 1 is designed in base one end and fixes.
2) the design headstock 6, worktable 4 and coaster 11, the three should have motion guide and driving mechanism, can do the high precision rectilinear motion along base rail.
3) interference mirror 8 of laser measurement system and laser head 9 are fixed on the coaster 11, and laser beam and head, tail frame two touch surveys the measurement axis coaxle that end 2 constitutes; Measuring mirror 5 is fixed on the measurement axis of the headstock 6.
4) measure the preceding rough position of setting the headstock 6 earlier according to the nominal length of measured size, movable block 11 is also fixing to the nearest position of the distance headstock again, measures then.
Claims (1)
1. variable light path laser length measuring machine, comprise base, tailstock, worktable, the headstock and coaster, it is characterized in that: interference mirror of laser measurement system (8) and laser head (9) are fixed on that coaster (11) is gone up, the laser measurement light beam touches the measurement axis coaxle of surveying end (2) formation with head, tail frame two; Measure mirror (5) and be fixed on the measurement axis of the headstock (6), set the rough position of the headstock (6) before the measurement earlier according to the nominal length of measured size, movable block (11) is also fixing to the position nearest apart from the headstock again, measures then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010108082 CN101776439A (en) | 2010-02-10 | 2010-02-10 | Variable light path laser length measuring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010108082 CN101776439A (en) | 2010-02-10 | 2010-02-10 | Variable light path laser length measuring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101776439A true CN101776439A (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010108082 Pending CN101776439A (en) | 2010-02-10 | 2010-02-10 | Variable light path laser length measuring machine |
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| Country | Link |
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| CN (1) | CN101776439A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775847A (en) * | 2018-05-11 | 2018-11-09 | 南京信息职业技术学院 | Gauge for measuring length of rod part |
| CN113910022A (en) * | 2021-11-11 | 2022-01-11 | 济南凯特尔机器有限公司 | Numerical control end surface cylindrical grinder for efficiently and ultraprecisely grinding high-speed cutter handle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152200Y (en) * | 1993-01-18 | 1994-01-05 | 朱家璈 | Measuring mechanism for combined laser guide screw measuring instrument |
| CN1275712A (en) * | 1999-05-27 | 2000-12-06 | 中国科学院光电技术研究所 | laser interference length measuring method |
| US6870605B2 (en) * | 2000-09-25 | 2005-03-22 | Agency Of Industrial Science And Technology, Ministry Of International Trade And Industry | Method of measuring length and coordinates using laser tracking interferometric length measuring instruments |
-
2010
- 2010-02-10 CN CN 201010108082 patent/CN101776439A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2152200Y (en) * | 1993-01-18 | 1994-01-05 | 朱家璈 | Measuring mechanism for combined laser guide screw measuring instrument |
| CN1275712A (en) * | 1999-05-27 | 2000-12-06 | 中国科学院光电技术研究所 | laser interference length measuring method |
| US6870605B2 (en) * | 2000-09-25 | 2005-03-22 | Agency Of Industrial Science And Technology, Ministry Of International Trade And Industry | Method of measuring length and coordinates using laser tracking interferometric length measuring instruments |
Non-Patent Citations (2)
| Title |
|---|
| 《应用激光》 19931031 赵建新等 一种精密的激光测长技术 231，230 1 第13卷, 第5期 2 * |
| 《新产品新技术》 20061231 胡清 测长机评述 25 1 , 第11期 2 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108775847A (en) * | 2018-05-11 | 2018-11-09 | 南京信息职业技术学院 | Gauge for measuring length of rod part |
| CN113910022A (en) * | 2021-11-11 | 2022-01-11 | 济南凯特尔机器有限公司 | Numerical control end surface cylindrical grinder for efficiently and ultraprecisely grinding high-speed cutter handle |
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Open date: 20100714 |