CN101865698A - Method for discriminating error source of angular instrument - Google Patents
Method for discriminating error source of angular instrument Download PDFInfo
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- CN101865698A CN101865698A CN201010189623A CN201010189623A CN101865698A CN 101865698 A CN101865698 A CN 101865698A CN 201010189623 A CN201010189623 A CN 201010189623A CN 201010189623 A CN201010189623 A CN 201010189623A CN 101865698 A CN101865698 A CN 101865698A
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- angle measuring
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Abstract
The invention discloses a method for discriminating an error source of an angular instrument, which belongs to the technical field of precision instrument measurements. The method comprises the following steps of: using two 0.2'' self-alignment light tubes to perform mutual opposite aiming so as to establish a reference line of which an error is less than 1''; fixing a plane mirror on a turntable of the angular instrument; rotating the turntable of the angular instrument, performing self alignments on the two light tubes by using the plane mirror respectively, and recording read numbers of a coder of the angular instrument; observing the conditions when angular difference values of the coder of the two alignments deviate 180 degrees, and if the measured deviation values are within a tolerance deviation according to overall accuracy allocation requirements of the angular instrument, discriminating the error source influencing the measurement accuracy is an optical sighting system; and if the measured deviation values are not with the tolerance deviation according to the overall accuracy allocation requirements of the angular instrument, discriminating the error source influencing the measurement accuracy is an axis or the coder. The method for discriminating the error source of the angular instrument can accurately and effectively judge the error source influencing the measurement accuracy, and can be used as a method for process inspections of parts of the angular instrument such as a transit instrument and the like.
Description
Technical field
The present invention is mainly used in the photoelectric measurement field, belongs to the exact instrument field of measuring technique, relates to a kind of method of differentiating the error source of angle measuring instrument.
Background technology
Along with development and the application of angle measuring instrument, more and more higher to the measuring accuracy requirement of angle measuring instrument in fields such as national defence, military project, aerospaces.In order to guarantee the measuring accuracy of angle measuring instrument, debug with use in, when measuring accuracy was overproof, accurately the error in judgement source had become important link.Do absolute timing signal at Subnano-class high-precision dot diffraction interferometer, need accurately to rotate the measured optical unit and carry out the interferogram collection, differentiate the method complexity of error source.After the single part of angle measuring instruments such as transit is debug detection, be assembled together again and carry out precision measure.When each parts debug detect qualified after, or after angle measuring instrument used a period of time, the measuring accuracy of instrument may not reach measurement requirement because it is more influence the parts and the factor of precision, it is relatively difficult to judge that sometimes which parts precision does not meet the demands.Therefore, how can differentiate the error source of angle measuring instrument rapidly and accurately, be problem anxious to be solved.
Summary of the invention
The purpose of this invention is to provide a kind of method of differentiating the error source of angle measuring instrument, this method can be differentiated the error source of angle measuring instrument rapidly and accurately, and is time saving and energy saving.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of method of differentiating the error source of angle measuring instrument comprises the steps:
Step 1: with two 0.2 " the autocollimatic light pipe to taking aim at, is set up datum line mutually, and the datum line error is less than 1 ";
Step 2: on the turntable of angle measuring instrument, fix a plane mirror;
Step 3: rotate the turntable of angle measuring instrument, utilize plane mirror respectively two light pipes to be carried out autocollimatic, write down the reading of angle measuring instrument scrambler;
Step 4: the scrambler angle difference of observing twice aligning departs from 180 ° situation, if distributing according to the angle measuring instrument overall accuracy, the deviation value that records requires in permissible variation, show that then axial system error, encoder errors meet the demands, the error source that influences measuring accuracy is an optical aiming system; Require not in permissible variation if the deviation value that records distributes according to the angle measuring instrument overall accuracy, show that then the error source that influences measuring accuracy is axle or scrambler; Thereby finish the method for the error source of differentiating angle measuring instrument.
The invention has the beneficial effects as follows: the factor of the decision influence angle measuring instrument measuring accuracy that this method can be accurate and effective is axle system, scrambler, or optical aiming system; Method of the present invention also can be used as the method for angle measuring instrument parts procedure inspections such as transit.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail.
The present invention differentiates the method for the error source of angle measuring instrument and successfully tries out in multiple angle measurement quasi-instrument, such as, angle measuring instruments such as point-diffraction interferometer, transit.
Be that example illustrates that the present invention differentiates the method for error source below with the transit.
Concrete grammar is: with two 0.2 " the autocollimatic light pipe to taking aim at, is set up datum line mutually, and the datum line error is less than 1 "; Fixing a plane mirror on the transit four-way or on the transverse axis spindle nose; Rotate the Z-axis or the transverse axis of transit, utilize plane mirror respectively two light pipes to be carried out autocollimatic, write down the reading of pitching scrambler and azimuth encoder; The scrambler angle difference of observing twice aligning departs from the situation of 180 degree; If the deviation value that scrambler records is 180 ° 3 ", and the actual permissible variation that distribution requires according to the transit overall accuracy is 5 ", showing that then the axial system error of transit, encoder errors meet the demands, the error source that influences measuring accuracy is an optical aiming system.If the deviation value that scrambler records is 180 ° 3 "; and the actual permissible variation that distribution requires according to the transit overall accuracy is 1 ", one of them does not reach designing requirement or in use changes then to show the axial system error of transit and encoder errors, and the error source that influences measuring accuracy is the axle system or the scrambler of transit.
In addition, when certain model ballistic camera is always examined, find that precision index is overproof, be difficult to judge which subsystem is out of joint, each subsystem all reexamines one time to waste time and energy, and has discharged axle system and scrambler soon by method of the present invention, and final the discovery is the fault of optical aiming system.
Claims (3)
1. a method of differentiating the error source of angle measuring instrument is characterized in that, this method comprises the steps:
Step 1: with two 0.2 " the autocollimatic light pipe to taking aim at, is set up datum line mutually, and the datum line error is less than 1 ";
Step 2: on the turntable of angle measuring instrument, fix a plane mirror;
Step 3: rotate the turntable of angle measuring instrument, utilize plane mirror respectively two light pipes to be carried out autocollimatic, write down the reading of angle measuring instrument scrambler;
Step 4: the scrambler angle difference of observing twice aligning departs from 180 ° situation, if distributing according to the angle measuring instrument overall accuracy, the deviation value that records requires in permissible variation, show that then axial system error, encoder errors meet the demands, the error source that influences measuring accuracy is an optical aiming system; Require not in permissible variation if the deviation value that records distributes according to the angle measuring instrument overall accuracy, show that then the error source that influences measuring accuracy is axle or scrambler; Thereby finish the method for the error source of differentiating angle measuring instrument.
2. the method for the error source of differentiation angle measuring instrument according to claim 1 is characterized in that, described angle measuring instrument is point-diffraction interferometer or transit or ballistic camera.
3. the method for the error source of differentiation angle measuring instrument according to claim 1, it is characterized in that, when described angle measuring instrument is transit, the fixed position of the described plane mirror of step 2 is on the transit four-way or on the transverse axis spindle nose, and the turntable of the described rotation angle measuring instrument of step 3 is for rotating the Z-axis or the transverse axis of transit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010189623XA CN101865698B (en) | 2010-06-02 | 2010-06-02 | Method for discriminating error source of angular instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010189623XA CN101865698B (en) | 2010-06-02 | 2010-06-02 | Method for discriminating error source of angular instrument |
Publications (2)
| Publication Number | Publication Date |
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| CN101865698A true CN101865698A (en) | 2010-10-20 |
| CN101865698B CN101865698B (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010189623XA Expired - Fee Related CN101865698B (en) | 2010-06-02 | 2010-06-02 | Method for discriminating error source of angular instrument |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017791A (en) * | 2012-12-12 | 2013-04-03 | 中国科学院长春光学精密机械与物理研究所 | Method for distinguishing error source of angle measuring instrument at high accuracy |
| CN104316082A (en) * | 2014-10-28 | 2015-01-28 | 中国科学院长春光学精密机械与物理研究所 | Theodolite external field infinite remote calibration method |
| CN104568382A (en) * | 2014-12-20 | 2015-04-29 | 中国科学院西安光学精密机械研究所 | System and method for measuring angle error of two arms of Sagnac interferometer |
| CN108827190A (en) * | 2018-09-03 | 2018-11-16 | 中国科学院长春光学精密机械与物理研究所 | High precision angle-measuring error detecting apparatus and its detection method based on double autocollimators |
-
2010
- 2010-06-02 CN CN201010189623XA patent/CN101865698B/en not_active Expired - Fee Related
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017791A (en) * | 2012-12-12 | 2013-04-03 | 中国科学院长春光学精密机械与物理研究所 | Method for distinguishing error source of angle measuring instrument at high accuracy |
| CN104316082A (en) * | 2014-10-28 | 2015-01-28 | 中国科学院长春光学精密机械与物理研究所 | Theodolite external field infinite remote calibration method |
| CN104568382A (en) * | 2014-12-20 | 2015-04-29 | 中国科学院西安光学精密机械研究所 | System and method for measuring angle error of two arms of Sagnac interferometer |
| CN104568382B (en) * | 2014-12-20 | 2017-04-19 | 中国科学院西安光学精密机械研究所 | System and method for measuring angle error of two arms of Sagnac interferometer |
| CN108827190A (en) * | 2018-09-03 | 2018-11-16 | 中国科学院长春光学精密机械与物理研究所 | High precision angle-measuring error detecting apparatus and its detection method based on double autocollimators |
| CN108827190B (en) * | 2018-09-03 | 2020-07-24 | 中国科学院长春光学精密机械与物理研究所 | High-precision angle measurement error detection device based on double autocollimators and detection method thereof |
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| CN101865698B (en) | 2012-04-11 |
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