The device of autocollimator error of indication detection method and application the method
Technical field
The present invention relates to apparatus measures field, especially autocollimator indication error detection device and method.
Background technology
Autocollimator is a kind of precision measuring instrument for small angle measurement, the method that detects at present the autocollimator error of indication is the method for introducing according in JJG202-2007 < < autocollimator > > national metrological verification regulations, by gauge block and low-angle somascope, form standard angle, then by autocollimator, measure these standard angles, record its error of indication.The subject matter that this detection method and device exist is: 1. complicated operation, waste time and energy, and personnel to be had relatively high expectations, labour intensity is large; 2. data calculation of complex, because the method relies on artificial reading, detecting data needs manual record and processing, so efficiency is lower, easily makes mistakes.
Summary of the invention
This invents technical matters to be solved is to realize the automatic measurement of the autocollimator error of indication, record and processing, improves detection efficiency and the accuracy of the autocollimator error of indication.
For addressing the above problem, the invention provides a kind of autocollimator error of indication detection method, it is characterized in that: by digital colimated light system, measure the angle of tested autocollimator indication, the angle of tested autocollimator indication passes to digital colimated light system by transmitting the biplane catoptron of same angular value; Adjust tested autocollimator, make it to produce the angle value variation of a plurality of check points, i.e. a
i-a
0, a wherein
0initial angle, a
iit is the measured value of a plurality of check points of tested autocollimator; The variation that therefore digital colimated light system records corresponding a plurality of angles value, i.e. b
i-b
0, b wherein
0corresponding initial value, b
iit is the measured value of the corresponding a plurality of check points of digital colimated light system; Obtain the error of indication δ of a plurality of check points
ifor δ
i=(a
i-a
0)-(b
i-b
0), get a plurality of δ
imaximal value and the net result of the difference of the minimum value error of indication that is tested autocollimator.
The present invention also provides a kind of device of applying described autocollimator error of indication detection method, comprise tested autocollimator 2, it is characterized in that: also comprise digital colimated light system 4 and double mirror fine motion system 3, double mirror fine motion system 3 is placed in the centre of tested autocollimator 2 and digital colimated light system 4, and the biplane catoptron of double mirror fine motion system 3 is for changing the angle of tested autocollimator 2 indications to pass to digital colimated light system 4.
Double mirror in described double mirror fine motion system 3 is the structure that becomes in the plane to have at any angle two or more reflectings surface.
In described double mirror fine motion system 3, there is the device of adjusting double-sided reflecting mirror angle.
Described digital colimated light system 4 comprises: light source 9, light lens 12, spectroscope 10, object lens 11, photoelectric conversion unit 5, data recording are calculated machine system 6, the light that light source 9 sends sees through light lens 12 after spectroscope 10 refractions, pass again object lens 11 by a face vertical reflection of double mirror, then through object lens 11, be mapped to photoelectric conversion unit 5 and be converted to electric signal, be input to data recording and calculate machine system 6.
Described digital colimated light system 4 adopts photo-electric or digital autocollimator.
Useful technique effect of the present invention: this invention has utilized photoelectric technology to form digital colimated light system, measures the indicating value of tested autocollimator by digital colimated light system, calculates the error of indication of tested autocollimator by data recording and computing system.This device does not need artificial reading, record and calculating, has improved detection efficiency and accuracy.
Accompanying drawing explanation
Fig. 1 is structure of the present invention and schematic diagram;
Fig. 2 is schematic diagram before graticule aims at;
Fig. 3 is schematic diagram before graticule aims at;
Fig. 4 is the second structure of the present invention and schematic diagram;
Fig. 5 is the third structure of the present invention and schematic diagram.
In figure: 1, microdrum, 2, tested autocollimator, 3, double mirror fine motion system, 4, digital colimated light system, 5, photoelectric conversion unit, 6, data recording is calculated machine system, and 7, reflection image crosshair, 8, graticule crosshair, 9, light source, 10, spectroscope, 11, object lens, 12, light lens.
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Embodiment
As shown in Figure 1: the centre that double mirror fine motion system 3 is placed in to digital colimated light system 4 and tested autocollimator 2; Wherein the double mirror Main Function in double mirror fine motion system 3 is to reflect respectively the light from two sides by parallel tow sides, double mirror can be rotated, and biplane catoptron can be also to become in the plane the structure at any angle with two or more reflectings surface; The light that wherein in digital colimated light system 4, light source 9 sends sees through light lens 12 after spectroscope 10 refractions, pass again object lens 11 by a face vertical reflection of double mirror, then through object lens 11, be mapped to photoelectric conversion unit 5 and be converted to electric signal, be input to data recording and calculate machine system 6, record and calculate; Digital colimated light system 4 also can adopt photo-electric or digital autocollimator; The microdrum 1 of tested autocollimator 2 is adjusted to the initial position a of check point
0, by double mirror fine motion system 3, rotary double-face catoptron, makes the reflection image crosshair 7 of tested autocollimator 2 aim at graticule crosshair 8(as shown in Figure 2,3), digital colimated light system 4 records corresponding initial value b
0and record the indicating value of this initial position, also can be by b
0zero clearing.Rotate the microdrum 1 of tested autocollimator 2, make the graticule crosshair 8 of tested autocollimator 2 navigate to the position a of measured point
1, then by double mirror fine motion system 3, rotary double-face catoptron, makes the reflection image crosshair 7 of tested autocollimator 2 aim at graticule crosshair 8(as shown in Figure 2,3), digital colimated light system 4 records current angle value b
1, b
1be the true angle value that tested autocollimator 2 graticule crosshairs 8 move relative to initial position, tested autocollimator 2 is at the error of indication δ at this check point place
1by formula (1), calculated:
δ
1=(a
1-a
0)-(b
1-b
0) (1)
Again rotate the microdrum 1 of tested autocollimator 2, make the graticule crosshair 8 of tested autocollimator 2 navigate to the position a of next measured point
2, repeat operation above, obtain angle value b
2, measure successively the check point of tested autocollimator, obtain a
3,a
4 ...,a
i,a
n, b
3,b
4 ...,b
i,b
n, through type (2) calculates the error of indication δ at each check point place
i for:
δ
i=(a
i-a
0)-(b
i-b
0) (2)
Get the net result of the error of indication that the maximal value of the error of indication and the difference of minimum value are tested autocollimator.
As shown in Figure 4, positive and negative two minute surfaces of double mirror can be uneven, and two minute surface can vertically reflect respectively the light with tested autocollimator 2 from digital colimated light system 4.
As shown in Figure 5, positive and negative two minute surfaces of double mirror can be in same plane, and two minute surface can vertically reflect respectively the light with tested autocollimator 2 from digital colimated light system 4.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.