CN203881347U - Testing system for absolute horizontal-reference accuracy - Google Patents
Testing system for absolute horizontal-reference accuracy Download PDFInfo
- Publication number
- CN203881347U CN203881347U CN201420223619.4U CN201420223619U CN203881347U CN 203881347 U CN203881347 U CN 203881347U CN 201420223619 U CN201420223619 U CN 201420223619U CN 203881347 U CN203881347 U CN 203881347U
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- plane mirror
- level reference
- test macro
- twin shaft
- precision test
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Abstract
The utility model relates to a testing system for the absolute horizontal-reference accuracy. The testing system comprises a two-dimension electronic level instrument, a plane reflecting mirror, a leveling base and a double-shaft autocollimator, wherein the two-dimension electronic level instrument, the plane reflecting mirror and the leveling base are arranged together in sequence from top to bottom; the double-shaft autocollimator is arranged above the plane reflecting mirror and the double-shaft autocollimator and the plane reflecting mirror are arranged in the same light path. The testing system provided by the utility model has the advantages of high automation, high efficiency and high accuracy.
Description
Technical field
The utility model belongs to precision optics technical field of measurement and test, relates to a kind of horizontal reference accuracy test system, relates in particular to a kind of abswolute level reference precision test macro.
Background technology
Level reference apparatus can provide abswolute level benchmark, be widely used at present multiple fields such as Laboratory Calibration, delicate metering, geodetic surveying, target range measurement, civil construction, and abswolute level benchmark is also the prerequisite guarantee of demarcating metering, engineering construction accurately.Abswolute level reference precision is the of paramount importance technical indicator of level reference apparatus, is the standard of weighing level reference apparatus performance quality.
Due to the natural characteristic of mercury, be therefore often chosen as the topmost starting material of production technique standard apparatus.This level reference apparatus is simple in structure, with low cost, reliability is high, is most widely used.But mercury purity is not high, impure more conventionally, and the phenomenon of Density inhomogeneity can cause the abswolute level benchmark that mercury liquid level provides to have error.Therefore be necessary abswolute level reference precision often to test, and test process is very high to testing apparatus, method and personnel's requirement.
The concrete steps of conventional test methodologies are: level reference apparatus to be measured is placed on turntable, settles above it plane mirror, fixed pan catoptron makes its minute surface normal and level angle at 45 °, sets up autocollimation theodolite at plane mirror opposite side.After mercury liquid level stabilizing half an hour, by the reflection of plane mirror, use autocollimation theodolite to carry out order to level reference apparatus to be measured and take aim at from locating tab assembly.Slowly 180 ° of rotating tables, stablize after half an hour again until mercury liquid level, carry out order again take aim at from locating tab assembly by autocollimation theodolite.According to the measured value in twice diameter direction, then by calculating abswolute level reference precision.
There is many drawbacks in conventional test methodologies: the first, setting up of plane mirror is loaded down with trivial details, its minute surface normal should with level angle at 45 °, if this angle has deviation, can affect final measuring accuracy, when deviation is excessive, even do not observe autocollimation picture, test cannot be carried out; The second, slowly 180 ° of rotating tables, object is in order to make mercury liquid level unitary rotation to diameter direction, but in fact mercury liquid level can not rotate 180 ° completely, causes the measured value in diameter direction not accurate enough; The 3rd, tester can introduce pointing error by autocollimation theodolite visual sight; The 4th, autocollimation light need to be turned back through plane mirror, and order of reflection is too much, light echo weak effect; The 5th, in test process, mercury liquid level need to stablize twice, and the test duration is long.
Visible, the abswolute level reference precision of use classic method testing level standard apparatus, instrument and equipment sets up loaded down with trivial details, and the error source of introducing in test process is more, and measuring accuracy is not high, and the test duration is long, and efficiency is low.
In view of above reason, extremely need a kind of abswolute level reference precision test macro.
Utility model content
In order to solve the above-mentioned technical matters existing in background technology, the utility model provides a kind of high automation, high-level efficiency and high-precision abswolute level reference precision test macro.
Technical solution of the present utility model is: the utility model provides a kind of abswolute level reference precision test macro, and its special character is: described abswolute level reference precision test macro comprises Two-dimensional electron level meter, plane mirror, leveling pedestal and twin shaft autocollimator; Described Two-dimensional electron level meter, plane mirror and leveling pedestal set gradually together from top to bottom; Described twin shaft autocollimator is arranged on the top of plane mirror and is placed in same light path with plane mirror.
The surface figure accuracy RMS value of above-mentioned plane mirror is not less than λ/20.
Above-mentioned plane mirror is coated with high reflection film.
Above-mentioned plane mirror is metal flat reflector or glass planar catoptron.
Above-mentioned leveling pedestal is the pedestal with three or four foot screw governor motions.
The utility model has the advantages that:
1, high automation.The utility model has adopted twin shaft autocollimator, and in-built CCD device replaces human eye completely and aims at, and has realized the automatic interpretation to autocollimation picture, and has exported in real time the test value of autocollimation drift angle.Make the test of abswolute level reference precision fundamentally realize high automation.
2, high-level efficiency.The utility model has adopted the erection mode of another kind of plane mirror, realizes the quick leveling to plane mirror minute surface by leveling pedestal and Two-dimensional electron level meter, compares traditional erection mode more efficient and convenient.Simultaneously, the utility model has also adopted twin shaft autocollimator, once twin shaft autocollimator to the complete autocollimatic of plane mirror after, just level reference apparatus to be measured can be put into optical system for testing, directly export test value by twin shaft autocollimator, level reference apparatus to be measured is without any adjustment, mercury liquid level only need be stablized once, has cancelled mercury liquid level and has rotated 180 ° and need the operating process of Quadratic Stability.Make the test of abswolute level reference precision fundamentally realize high-level efficiency.
3, high precision.The utility model has adopted the erection mode of another kind of plane mirror, realize the accurate leveling to plane mirror minute surface by leveling pedestal and Two-dimensional electron level meter, eliminate the plane mirror angular deviation of being introduced by traditional erection mode, and cancel the turn back process of plane mirror to autocollimation light, improved light echo effect.Meanwhile, the utility model has also adopted twin shaft autocollimator, without human eye aim at, eliminated pointing error, more without carrying out diameter measurement, eliminated by mercury liquid level do not rotate completely 180 ° and introduce self-collimation measurement error.Make the test of abswolute level reference precision fundamentally realize high precision.
Brief description of the drawings
Fig. 1 is the test schematic diagram of abswolute level reference precision test macro provided by the utility model;
Wherein:
1-Two-dimensional electron level meter; 2-plane mirror; 3-flattens pedestal; 4-twin shaft autocollimator; 5-level reference apparatus to be measured.
Embodiment
The utility model provides a kind of abswolute level reference precision test macro, and this test macro comprises Two-dimensional electron level meter, plane mirror, leveling pedestal and twin shaft autocollimator; Twin shaft autocollimator positioned beneath plane mirror; Plane mirror positioned beneath leveling pedestal, Two-dimensional electron level meter is settled in its minute surface top; After Two-dimensional electron level meter is taken away, adjust twin shaft autocollimator to the complete autocollimatic of plane mirror; Take plane mirror and leveling pedestal away, in same position, level reference apparatus to be measured is placed in below twin shaft autocollimator.
Below in conjunction with accompanying drawing, the utility model is elaborated.
Referring to Fig. 1, the utility model provides a kind of abswolute level reference precision test macro, and the instrument and equipment that this abswolute level reference precision test macro is used comprises Two-dimensional electron level meter 1, plane mirror 2, leveling pedestal 3, twin shaft autocollimator 4, level reference apparatus to be measured 5.Plane mirror in this abswolute level reference precision test macro is placed on leveling pedestal, and Two-dimensional electron level meter is settled in its minute surface top; After the leveling of plane mirror minute surface, take Two-dimensional electron level meter away, twin shaft autocollimator is erected to plane mirror top; The measuring head of twin shaft autocollimator is just to plane mirror minute surface; Adjust twin shaft autocollimator to the complete autocollimatic of plane mirror; Take plane mirror and leveling pedestal away, in same position, level reference apparatus to be measured is placed in the optical system for testing below twin shaft autocollimator measuring head.
Two-dimensional electron level meter 1 has display screen, can measure the absolute tilt quantity of horizontal basal plane, and the inclination value of pairwise orthogonal direction is provided simultaneously, and be presented in real time on display screen with angle form, two orientation measurement precision are 0.2 ", base is 0 grade of grouan base, and uses dry cell power supply.
Plane mirror 2 bores are not less than Φ 200mm, and material of main part is glass or metal, and are coated with high reflection film, and reflectivity can reach 99%, and surface figure accuracy RMS value is not less than λ/20.
Leveling pedestal 3 is the pedestals with three or four foot screw governor motions, three foot screws be 120 ° uniform, four foot screws be 90 ° uniform, load-bearing is not less than 30kg.
Twin shaft autocollimator 4 adopts CCD image device and visible laser light source, can automatically gather autocollimation picture, automatic interpretation autocollimation drift angle provides orthogonal two axial test values simultaneously, have absolute measurement and two kinds of patterns of relative measurement that can zero clearing, two axial angle measurement accuracys are 0.1 ".
The abswolute level benchmark of level reference apparatus 5 to be measured is provided by mercury liquid level.
Settle testing apparatus according to Fig. 1, principle of work is: select the place of steady vibration isolation to settle leveling pedestal 3, above leveling pedestal 3, lay plane mirror 2, the minute surface normal of plane mirror 2 straight up; Two-dimensional electron level meter 1 is placed on plane mirror 2, the grouan base of Two-dimensional electron level meter 1 is contacted with the minute surface of plane mirror 2; Open the power supply of Two-dimensional electron level meter 1, after registration is stable, regulate the foot screw of leveling pedestal 3, and the absolute inclination magnitude variations of simultaneously observing Two-dimensional electron level meter 1, constantly regulate the minute surface of plane mirror 2 is definitely flattened; Take Two-dimensional electron level meter 1 away, above the minute surface of plane mirror 2, set up twin shaft autocollimator 4, the measuring head of twin shaft autocollimator 4 minute surface to plane mirror 2 just straight down; Keep the position stability of leveling pedestal 3 and plane mirror 2 constant, regulate twin shaft autocollimator 4 to make it to the complete autocollimatic of plane mirror 2, and by registration zero clearing; Take leveling pedestal 3 and plane mirror 2 away, keep the position stability of twin shaft autocollimator 4 constant, level reference apparatus 5 to be measured is placed in the optical system for testing of measuring head below of twin shaft autocollimator 4; After mercury liquid level stabilizing half an hour of level reference apparatus 5 to be measured, read orthogonal two axial test value X and Y by twin shaft autocollimator 4, finally according to formula
calculate the abswolute level reference precision of level reference apparatus 5 to be measured.
Claims (5)
1. an abswolute level reference precision test macro, is characterized in that: described abswolute level reference precision test macro comprises Two-dimensional electron level meter, plane mirror, leveling pedestal and twin shaft autocollimator; Described Two-dimensional electron level meter, plane mirror and leveling pedestal set gradually together from top to bottom; Described twin shaft autocollimator is arranged on the top of plane mirror and is placed in same light path with plane mirror.
2. abswolute level reference precision test macro according to claim 1, is characterized in that: the surface figure accuracy RMS value of described plane mirror is not less than λ/20.
3. abswolute level reference precision test macro according to claim 2, is characterized in that: described plane mirror is coated with high reflection film.
4. abswolute level reference precision test macro according to claim 3, is characterized in that: described plane mirror is metal flat reflector or glass planar catoptron.
5. abswolute level reference precision test macro according to claim 4, is characterized in that: described leveling pedestal is the pedestal with three or four foot screw governor motions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223619.4U CN203881347U (en) | 2014-05-04 | 2014-05-04 | Testing system for absolute horizontal-reference accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223619.4U CN203881347U (en) | 2014-05-04 | 2014-05-04 | Testing system for absolute horizontal-reference accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203881347U true CN203881347U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420223619.4U Expired - Fee Related CN203881347U (en) | 2014-05-04 | 2014-05-04 | Testing system for absolute horizontal-reference accuracy |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034349A (en) * | 2014-05-04 | 2014-09-10 | 中国科学院西安光学精密机械研究所 | Absolute horizontal reference precision test system and test method thereof |
| CN105068259A (en) * | 2015-08-13 | 2015-11-18 | 中科院南京天文仪器有限公司 | Precision adjusting method used for two-dimensional scanning device optical device normal angle |
| CN109798928A (en) * | 2019-01-23 | 2019-05-24 | 长春理工大学 | Based on the reciprocal shaft-position encoder gamut accuracy checking method of corner |
-
2014
- 2014-05-04 CN CN201420223619.4U patent/CN203881347U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034349A (en) * | 2014-05-04 | 2014-09-10 | 中国科学院西安光学精密机械研究所 | Absolute horizontal reference precision test system and test method thereof |
| CN105068259A (en) * | 2015-08-13 | 2015-11-18 | 中科院南京天文仪器有限公司 | Precision adjusting method used for two-dimensional scanning device optical device normal angle |
| CN105068259B (en) * | 2015-08-13 | 2017-08-25 | 中科院南京天文仪器有限公司 | Accurate method of adjustment for optics normal angle in two-dimensional scan device |
| CN109798928A (en) * | 2019-01-23 | 2019-05-24 | 长春理工大学 | Based on the reciprocal shaft-position encoder gamut accuracy checking method of corner |
| CN109798928B (en) * | 2019-01-23 | 2022-01-28 | 长春理工大学 | Full-range precision detection method of shaft-position encoder based on rotation angle reciprocal |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20170504 |
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| CF01 | Termination of patent right due to non-payment of annual fee |