SU370457A1 - COORDINATOMETER - Google Patents

Description

one

This invention relates to a measurement technique.

Coordinometers are known for measuring the dimensions of products by a contactless optical method, comprising a housing, horizontal and vertical limbs, a linear scale, an optical system for transmitting the image of scales in the field of view of the operator, and a spring tube installed rotatably in the horizontal and vertical planes and having an autocollimator for pointing an object.

The purpose of the invention is to simplify the device and expand the limits of measurement while improving the measurement accuracy.

This is achieved by the fact that the vertical limb is rigidly connected with the telescope and can be rotated with it relative to the common axis in the horizontal and vertical planes and displaced relative to the horizontal limb and a linear scale installed vertically along the axis of the body in the plane, the telescope passes through the line of sight, and the autocollimator mirror is located on the rotating part of the body.

FIG. 1 shows a schematically described coordinate meter, and section A-A in FIG. one; in fig. 2 is a section according to BB in FIG. one; in fig. 3 is a section along the line BB of FIG. one;

Wah FIG. 4-6 are diagrams explaining the prii ai to determine the size of the product.

The coordinate meter contains a telescope / having a focusing limit on the measurement object from zero meters to oo. The telescope is rigidly connected to the vertical limb 2 and can move up and down along the column of the housing 3 relative to the stationary millimeter scale 4 and horizontal limb 5. Observation of the measurement unit leads to a moving shark p 6 where the images of the reference field of view of the millimeter scale 4 and the autocollimator 7. Observation of readings on limbs 2 and 5 is carried out in the field of view of a stationary shark 8 of the reference limb system.

The millimeter scale light 4, vertical 2, horizontal 5 limbs and autocollimator 7 is illuminated with lamps L1 h-L4.

The line of sight about the optic tube / is aligned with the plane of graduation of the millimetric scale 4, and the axis Oi-Oi of rotation of the optic tube passes through the line of symmetry 02-Oz of the divisions of scale 4 and the center of the vertical limb. The line of symmetry 02-02 passes through the center of the horizontal limb 5, relative to which the tube rotates through an angle from 0 to 360 °.

The autocollimator 7 is reinforced together with the telescope case /, and when it is tilted relative to the horizon in the field of view of the eyepiece 6 of the tube, an autocollimation image of the grid bisector reflected from the stationary mirror 9 of the autocollimator 7 is observed. and, directly or indirectly, determine the vertical and horizontal coordinates of the products. The length of the inclined segment (see Fig. 5) is determined by the formula: / (/ W. + 2-2 g r-co85 ,, (1) where di, dz is the distance to the measured points of the inclined straight AB; 8 - the reference angle in vertical lvmbu 2 between direct OA and OB The distance to the measured points is determined by the formulas: di - /, - tgsj where 8i and 82 are the angles of inclination of the axis of sight of the pipe to the extreme points of the vertical inclined section. if the length of the measured segment AB significantly exceeds the length of the scale (see Fig. 6), then the vertical leg of the segment is defined as the sum of three segments:, + h, l ,,., igs + d, .tg, (3) where di - ra 8, 81 — The angles of inclination of the axis of sight to the extreme points of the straight line, the dimensions of the inclined horizontal segments (see Fig. 5) are measured by the formula: K, + d ,, - cosf ,, (4) where 81 and 82 are the angles counted on the vertical limb; F1 is the angle counted on the horizontal limb between the straight lines of the OB and OA; According to Fig. 5 di / i-tg8i; d2 li-ige2, During operation, measurement of catheto1B and sloped sections are produced as follows. The telescope / is moved in height relative to the millimeter scale 4 and two counts are taken when the pipe is installed horizontally by the autocollimator 7. In these fields, the size / i is determined on a scale equal to the difference of two counts needed for counting using formulas 2 and 3 If the measured segment is greater than the length of the scale, then it is necessary to calculate di / -tg82 (see Fig. 6) by measuring the angles 8 ,, RI and 82 along the vertical limb. The angle 8i is determined at a sight from the lower point of the first reference on the scale of point B and D. Distance (ii / i-tg82 is determined by calculation after measuring the angle between the direct OS and the axis of the scale divisions., 90 ° - So, where 8o is the angle between two pipe positions when sighting the points O at points C and D. Calculating the dimensions of the horizontal coordinates X and Y of the segments is done after calculating and measuring the angle Φ1 with two sightings at the points A to B of the segment AB. di and dz (see fig. 5) are made similarly for No distances for vertical segments: di / j-tgs, dl, -tgs Subject of the invention Coordinator for measuring the dimensions of products in a contactless optical method, comprising a body, horizontal and vertical limbs, a linear scale, an optical system for transmitting images of scales in the field of view of the operator and a telescope mounted rotatably in horizontal and vertical planes and having an autocollimator for aiming at an object, characterized in that, in order to simplify the device and extend the measurement limits at the same time, the vertical limb is rigidly connected with the telescope and made to rotate with it relative to the common axis in the horizontal and vertical planes and to move relative to the horizontal limb and the linear scale installed vertically along the axis of the body in the plane; through the sight line of the telescope, and the autocollimator mirror is located on the rotary part of the body.

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