CN205300603U - Angle measurement accuracy calibration system - Google Patents

Abstract

The utility model belongs to the technical field of accurate optical test, concretely relates to angle measurement accuracy calibration system. This system includes total powerstation, electronic two -dimensional translation table, cooperative target, circle prism, the origin of coordinate who waits to mark the electronic two -dimensional translation table translation face of optical axis perpendicular to of optical measurements part and pass through electronic two -dimensional translation table, by the total powerstation lies in and waits to demarcate the optical measurements parts, its height of center with height such as electronic two -dimensional translation table's origin of coordinate, the origin of coordinate department that the cooperative target was installed at electronic two -dimensional translation table, the circle prism is installed in electronic two -dimensional translation table's X direction and by being located the cooperative target, height such as the center of circle prism and cooperative target center, wait that the distance of maring optical measurements part and total powerstation and electronic two -dimensional translation table is 27m~30m. Require the angle measurement accuracy, make the angle measurement error little through using this utility model can satisfy the height.

Description

A kind of angle measurement accuracy calibration system

Technical field

This utility model belongs to precision optics technical field of measurement and test, is specifically related to a kind of angle measurement accuracy calibration system.

Background technology

Optical measurement is mainly used in Small object is deviateed the measurement of main shaft angle, is now widely used for the technical field such as target recognition, target detection. Angle measurement accuracy is that optical calibrating measures the of paramount importance technical specification of parts, is weigh the standard that optical measurement performance is good and bad.

In the calibration process of angle measurement accuracy, the true value calibrated is the key factor determining measurement error, and therefore the demarcation of true value is often significantly high to the requirement of test equipment, method and personnel.

When required precision is relatively low, existing method is to adopt target plate, target plate being determined, a central point makes its initial point measuring parts with optical calibrating overlap, choose diverse location at each quadrant and use tape measure translational movement, obtain the true value of deviation main shaft angle subsequently according to the distance between target plate and optical measurement, compare with the measured value of optical measurement and obtain angle measurement accuracy.

But when angle measurement accuracy requires higher, said method cannot accurately measure angle measurement accuracy. First, the certainty of measurement of tape measure is limited; Second, in measurement process, tape measure cannot accurately be directed at impact point, and the inclination of tape measure and collimating fault all can cause measurement error. When measuring distance for 20m��70m, both the angle measurement accuracy error comprehensively brought is between 0.01mrad��0.05mrad, and the more near then angle measurement accuracy error of distance is more big.

Utility model content

In order to solve the above-mentioned technical problem existed in background technology, a kind of angle measurement accuracy calibration system that this utility model provides a kind of can meet high request angle measurement accuracy, angle error is little.

Technical solution of the present utility model is:

This utility model provides a kind of angle measurement accuracy calibration system, including total powerstation, electronic two-dimension translational platform, cooperative target, circle prism;

The optical axis of optical measurement to be calibrated is perpendicular to electronic two-dimension translational stage translation face and by the zero of electronic two-dimension translational platform;

Described total powerstation is positioned at by optical measurement to be calibrated, and high and described electronic two-dimension translational platform the zero in its center is contour;

Described cooperative target is arranged on the zero place of electronic two-dimension translational platform;

Described round prism is arranged on the X direction of electronic two-dimension translational platform and is positioned at by cooperative target, and the center of circle prism is contour with cooperative target center;

The distance of described optical measurement to be calibrated and total powerstation and electronic two-dimension translational platform is 27m��30m.

In order to total powerstation is easily installed, this system also includes being erected at below total powerstation for regulating the spider of total powerstation height.

It should be noted that the parts of native system have certain technical specification, respectively: electronic two-dimension translational stage translation scope is not less than 600mm; Circle prism bore is not less than 40mm, and is coated with reflectance coating, and reflectance is 99%.

The utility model has the advantages that:

1, high efficiency. This utility model have employed total powerstation, can coordinate with circle prism and directly read plan range, when ensureing equal accuracy, the measurement time can be made to shorten more than half.

2, in high precision. This utility model have employed total powerstation and electronic two-dimension translational platform, the translation distance of moving guide rail in electronic two-dimension translational platform is obtained by total powerstation, and thus obtain angle measurement accuracy, eliminate the measurement error brought by tape measure, simultaneously, omnidistance use total powerstation measurement, improves pointing accuracy, reduces and aim at the error brought.

Accompanying drawing explanation

Fig. 1 is the test schematic diagram of angle measurement accuracy calibration system provided by the utility model.

Detailed description of the invention

This utility model provides a kind of angle measurement accuracy calibration system, and referring to Fig. 1, this system includes total powerstation 2, circle prism 3, cooperative target 4, electronic two-dimension translational platform 5;

The optical axis of optical measurement 1 to be calibrated is perpendicular to electronic two-dimension translational platform 5 translational plane and by the zero of electronic two-dimension translational platform 5;

It is other that total powerstation 2 is positioned at optical measurement 1 to be calibrated, and high and described electronic two-dimension translational platform 5 the zero in its center is contour;

Cooperative target 4 is arranged on the zero place of electronic two-dimension translational platform 5;

Circle prism 3 is arranged on the X direction of electronic two-dimension translational platform 5 and is positioned at cooperative target 4 side, and its center is contour with cooperative target 4 center;

The distance of optical measurement 1 to be calibrated and total powerstation 2 and electronic two-dimension translational platform 5 is 27m��30m.

Total powerstation 2 in this system is placed on spider, and 5 liang of translation directions of electronic two-dimension translational platform are parallel with the visual graticle horizontal hair of total powerstation 2 and vertical hair respectively; Total powerstation 2 is equal with the distance of electronic 5 liang of translating rails of two-dimension translational platform

Total powerstation has display screen, azimuth and the angle of pitch of target can be measured, and the distance between prism conjunction measuring total powerstation and circle prism and can be justified, and show on a display screen with the form of angle and distance, can be calculated, when measuring distance for 20m��70m, total powerstation the angle measurement accuracy error brought is between 0.002mrad��0.003mrad.

Wherein it should be noted that, electronic two-dimension translational platform 5 range of translation of this system is not less than 600mm. Circle prism 3 bore is not less than 40mm, and is coated with highly reflecting films, and reflectance can reach 99%.

Cooperative target can send laser and be received by optical measurement to be calibrated, obtains deviation main shaft angle.

Disposing test equipment according to Fig. 1, for the Ith quadrant, method of the present utility model is as follows:

Step 1) location:

Step 1.1) riding position of optical measurement to be calibrated is determined with total powerstation;

Specific practice is: select the place of steady shock insulation to dispose spider, spider is installed total powerstation, by total powerstation leveling, electronic two-dimension translational platform is vertically disposed at predetermined distance place, use hand-held stadia surveying total powerstation to the distance of bidimensional translation stage the right and left and to adjust to equidistantly, use vertical to adjust bidimensional translation stage vertical direction simultaneously; Adjust spider height, make bidimensional translation stage zero and total powerstation center contour, adjust bidimensional translation stage so that it is two translation directions are parallel with total powerstation visual graticle horizontal hair and vertical hair respectively; Circle prism is fixed on the zero place of bidimensional translating rails, uses total station survey to bidimensional translation stage distance, adjust total powerstation front and back position and make itself and bidimensional translation stage distance be predetermined distance;

Step 1.2) optical measurement to be calibrated is placed on total powerstation position, it is desirable to and its optical axis is perpendicular to electronic two-dimension translational stage translation face the optical measurement to be calibrated of the zero by electronic two-dimension translational platform;

Step 1.3) total powerstation is placed on by optical measurement to be calibrated, it is desirable to and high and electronic two-dimension translational platform the zero in total powerstation center is contour;

Step 2) measure:

Step 2.1) cooperative target is placed on the zero of electronic two-dimension translational platform, circle prism is arranged on the X-direction of electronic two-dimension translational platform and is positioned at by cooperative target, it is desirable to center of its circle prism is contour with cooperative target center;

Step 2.2) aim at circle prism rib point with total powerstation, read the orientation values A of now total powerstation₁Peace is from L₁;

Step 2.3) control electronic two-dimension translational platform and move to any position in optical measurement visual field to be calibrated along X direction (X-direction), aim at circle prism rib point with total powerstation, read the orientation values A of now total powerstation₂, pitch value E₁Peace is from L₂;

Step 2.4) control electronic two-dimension translational platform (Z-direction) more longitudinally axially and move to any position in optical measurement visual field to be calibrated, aim at circle prism rib point with total powerstation, read the pitch value E of now total powerstation₂;

Step 2.5) by the deviation angle �� (the optical measurement main shaft to be calibrated said refers to the optical axis of optical measurement to be calibrated itself in fact) of optical calibrating to be calibrated measurement component retrieval cooperative target deviation optical measurement main shaft to be calibrated herein;

Step 3) demarcate:

Step 3.1) by formula (1) and formula (2) computer azimuth angle and pitching angle:

A=| A₂-A₁|��������(1)

E=| E₂-E₁|��������(2)

Step 3.2) calculate X to translation distance by formula (3):

$X=\sqrt{{L_1}^2+{L_2}^2-2L_1{L}_2\cos A}\mathrm{...}\left(3\right)$

Step 3.3) by formula (4) calculating Z-direction translation distance be:

Z=L₂��tanE��������(4)

Step 3.4) by formula (5) computational rules apart under angle measurement accuracy ��:

$\mathrm{\Δ}=|{\tan }^{-1}\left(\frac{\sqrt{X^2+Z^2}}{L}\right)-\mathrm{\θ}|\mathrm{...}\left(5\right),$

In formula:

A orientation angle;

E₁��E₂The pitch value that total powerstation records;

E pitching angle;

L₁��L₂Total powerstation record flat from;

The transverse translation distance of the electronic two-dimension translational platform of X;

The longitudinal translation distance of the electronic two-dimension translational platform of Z;

The distance of L optical measurement to be calibrated and electronic two-dimension translational platform;

�� step 2.5 is surveyed deviation main shaft angle;

�� angle measurement accuracy.

By can be calculated, when measuring distance for 20m��70m, the angle measurement accuracy error of the method can reach between 0.002mrad��0.003mrad.

Claims (3)

1. an angle measurement accuracy calibration system, it is characterised in that: include total powerstation, electronic two-dimension translational platform, cooperative target, circle prism;

The optical axis of optical measurement to be calibrated is perpendicular to electronic two-dimension translational stage translation face and by the zero of electronic two-dimension translational platform;

Described total powerstation is positioned at by optical measurement to be calibrated, and high and described electronic two-dimension translational platform the zero in its center is contour;

Described cooperative target is arranged on the zero place of electronic two-dimension translational platform;

Described round prism is arranged on the X direction of electronic two-dimension translational platform and is positioned at by cooperative target, and the center of circle prism is contour with cooperative target center;

The distance of described optical measurement to be calibrated and total powerstation and electronic two-dimension translational platform is 27m��30m.

2. angle measurement accuracy calibration system according to claim 1, it is characterised in that: also include being erected at below total powerstation for regulating the spider of total powerstation height.

3. angle measurement accuracy calibration system according to claim 1 and 2, it is characterised in that: described electronic two-dimension translational stage translation scope is not less than 600mm; Described round prism bore is not less than 40mm, and is coated with reflectance coating, and reflectance is 99%.