CN104034349A - Absolute horizontal reference precision test system and test method thereof - Google Patents
Absolute horizontal reference precision test system and test method thereof Download PDFInfo
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- CN104034349A CN104034349A CN201410184200.7A CN201410184200A CN104034349A CN 104034349 A CN104034349 A CN 104034349A CN 201410184200 A CN201410184200 A CN 201410184200A CN 104034349 A CN104034349 A CN 104034349A
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- plane mirror
- level reference
- twin shaft
- dimensional electron
- autocollimator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Abstract
The invention relates to an absolute horizontal reference precision test system and a test method thereof. The absolute horizontal reference precision testing system includes a two-dimensional electronic level, a plane mirror, a leveling base and a biaxial autocollimator; the two-dimensional electronic level, the plane mirror and the leveling base are sequentially arranged together from top to bottom; and the biaxial autocollimator is arranged above the plane mirror, and the biaxial autocollimator and the plane mirror are arranged in a same optical path. The absolute horizontal reference precision testing system and the test method have the advantages of high automation, high efficiency and high precision.
Description
Technical field
The invention belongs to precision optics technical field of measurement and test, relate to a kind of horizontal reference accuracy test system, relate in particular to a kind of abswolute level reference precision test macro and method of testing.
Background technology
Level reference apparatus can provide abswolute level benchmark, be widely used at present a plurality of 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 °, at plane mirror opposite side, sets up autocollimation theodolite.Until mercury liquid level stabilizing, after 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 rotating table is 180 °, until mercury liquid level, again stablizes after half an hour, carries 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 rotating table is 180 °, and 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.
Summary of the invention
In order to solve the above-mentioned technical matters existing in background technology, the invention provides a kind of high automation, high-level efficiency and high-precision abswolute level reference precision test macro and method of testing.
Technical solution of the present invention is: the invention provides a kind of abswolute level reference precision test macro, 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.
A method of testing based on abswolute level reference precision test macro as above, its special character is: said method comprising the steps of:
1) Two-dimensional electron level meter, plane mirror and leveling pedestal are installed;
2) regulate leveling pedestal that the minute surface of plane mirror is definitely flattened;
3) regulate twin shaft autocollimator to make it to the complete autocollimatic of plane mirror;
4) by twin shaft autocollimator, read axial test value X and the Y of quadrature two of level reference apparatus to be measured, finally according to formula
calculate the abswolute level reference precision of level reference apparatus to be measured.
Above-mentioned steps 1) specific implementation is:
1.1) select the place of steady vibration isolation to settle leveling pedestal;
1.2) above leveling pedestal, lay plane mirror, the minute surface normal of plane mirror straight up;
1.3) Two-dimensional electron level meter is placed on plane mirror, the grouan base of Two-dimensional electron level meter is contacted with the minute surface of plane mirror.
Above-mentioned steps 2) specific implementation is: the power supply of opening Two-dimensional electron level meter, after registration is stable, regulate the foot screw of leveling pedestal, and the absolute inclination magnitude variations of simultaneously observing Two-dimensional electron level meter, constantly regulate the minute surface of plane mirror is definitely flattened.
Above-mentioned steps 3) specific implementation is: take Two-dimensional electron level meter away, set up twin shaft autocollimator above the minute surface of plane mirror, the measuring head of twin shaft autocollimator is straight down over against the minute surface of plane mirror; Keep the position stability of leveling pedestal and plane mirror constant, regulate twin shaft autocollimator to make it to the complete autocollimatic of plane mirror, and by registration zero clearing.
Above-mentioned steps 4) specific implementation is:
Take leveling pedestal and plane mirror away, keep the position stability of twin shaft autocollimator constant, level reference apparatus to be measured is placed in the optical system for testing of measuring head below of twin shaft autocollimator; Until the mercury liquid level stabilizing of level reference apparatus to be measured, after half an hour, by twin shaft autocollimator, read quadrature two axial test value X and Y, finally according to formula
calculate the abswolute level reference precision of level reference apparatus to be measured.
Advantage of the present invention is:
1, high automation.The present invention 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 present invention has adopted the erection mode of another kind of plane mirror, by leveling pedestal and Two-dimensional electron level meter, realizes the quick leveling to plane mirror minute surface, compares traditional erection mode more efficient and convenient.Simultaneously, the present invention 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, by twin shaft autocollimator, directly export test value, 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 present invention has adopted the erection mode of another kind of plane mirror, by leveling pedestal and Two-dimensional electron level meter, realize the accurate leveling to plane mirror minute surface, eliminated the plane mirror angular deviation of being introduced by traditional erection mode, and cancelled the turn back process of plane mirror to autocollimation light, improved light echo effect.Meanwhile, the present invention has also adopted twin shaft autocollimator, without human eye, aims at, and has eliminated pointing error, more without carrying out diameter measurement, has eliminated by mercury liquid level and has not rotated 180 ° and the self-collimation measurement error introduced completely.Make the test of abswolute level reference precision fundamentally realize high precision.
Accompanying drawing explanation
Fig. 1 is the test schematic diagram of abswolute level reference precision test macro provided by the present invention;
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 invention provides a kind of abswolute level reference precision test macro, 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, below same position is placed in level reference apparatus to be measured twin shaft autocollimator.
Below in conjunction with accompanying drawing, the present invention will be described in detail.
Referring to Fig. 1, the invention provides a kind of abswolute level reference precision test macro, 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 over against 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 the axial test value of quadrature two 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.
According to Fig. 1, settle testing apparatus, 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, set up twin shaft autocollimator 4 above the minute surface of plane mirror 2, the measuring head of twin shaft autocollimator 4 is straight down over against the minute surface of plane mirror 2; 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; Until the mercury liquid level stabilizing of level reference apparatus 5 to be measured, after half an hour, by twin shaft autocollimator 4, read quadrature two axial test value X and Y, finally according to formula
calculate the abswolute level reference precision of level reference apparatus 5 to be measured.
Claims (10)
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.
6. the method for testing based on abswolute level reference precision test macro as claimed in claim 5, is characterized in that: said method comprising the steps of:
1) Two-dimensional electron level meter, plane mirror and leveling pedestal are installed;
2) regulate leveling pedestal that the minute surface of plane mirror is definitely flattened;
3) regulate twin shaft autocollimator to make it to the complete autocollimatic of plane mirror;
4) by twin shaft autocollimator, read axial test value X and the Y of quadrature two of level reference apparatus to be measured, finally according to formula
calculate the abswolute level reference precision of level reference apparatus to be measured.
7. method of testing according to claim 6, is characterized in that: specific implementation described step 1) is:
1.1) select the place of steady vibration isolation to settle leveling pedestal;
1.2) above leveling pedestal, lay plane mirror, the minute surface normal of plane mirror straight up;
1.3) Two-dimensional electron level meter is placed on plane mirror, the grouan base of Two-dimensional electron level meter is contacted with the minute surface of plane mirror.
8. method of testing according to claim 7, it is characterized in that: specific implementation described step 2) is: the power supply of opening Two-dimensional electron level meter, after registration is stable, regulate the foot screw of leveling pedestal, and observe the absolute inclination magnitude variations of Two-dimensional electron level meter simultaneously, constantly regulate the minute surface of plane mirror is definitely flattened.
9. method of testing according to claim 8, it is characterized in that: specific implementation described step 3) is: take Two-dimensional electron level meter away, above the minute surface of plane mirror, set up twin shaft autocollimator, the measuring head of twin shaft autocollimator is straight down over against the minute surface of plane mirror; Keep the position stability of leveling pedestal and plane mirror constant, regulate twin shaft autocollimator to make it to the complete autocollimatic of plane mirror, and by registration zero clearing.
10. method of testing according to claim 9, is characterized in that: specific implementation described step 4) is:
Take leveling pedestal and plane mirror away, keep the position stability of twin shaft autocollimator constant, level reference apparatus to be measured is placed in the optical system for testing of measuring head below of twin shaft autocollimator; Until the mercury liquid level stabilizing of level reference apparatus to be measured, after half an hour, by twin shaft autocollimator, read quadrature two axial test value X and Y, finally according to formula
calculate the abswolute level reference precision of level reference apparatus to be measured.
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| CN106403990A (en) * | 2015-07-31 | 2017-02-15 | 北京航天计量测试技术研究所 | Calibration apparatus for consistency of optical axes |
| CN108828748A (en) * | 2018-05-31 | 2018-11-16 | 北京航天发射技术研究所 | A kind of optical path is turned back the reflecting mirror Method of Adjustment and system of device |
| CN113251995A (en) * | 2021-05-18 | 2021-08-13 | 中国科学院云南天文台 | Method for obtaining all-weather astronomical longitude and latitude indirect measurement value |
| CN114966889A (en) * | 2022-05-24 | 2022-08-30 | 中国科学院西安光学精密机械研究所 | Stability precision detection device for airborne stable platform and test method thereof |
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| CN113251995A (en) * | 2021-05-18 | 2021-08-13 | 中国科学院云南天文台 | Method for obtaining all-weather astronomical longitude and latitude indirect measurement value |
| CN114966889A (en) * | 2022-05-24 | 2022-08-30 | 中国科学院西安光学精密机械研究所 | Stability precision detection device for airborne stable platform and test method thereof |
| CN114966889B (en) * | 2022-05-24 | 2024-04-12 | 中国科学院西安光学精密机械研究所 | Device and method for detecting stability and precision of airborne stabilized platform |
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