SU1216632A1 - Method of measuring deflection from perpendicularity of t-angle - Google Patents

Abstract

The invention relates to a measurement technique and can be used in measuring the deviation from the perpendicularity of an L-shaped gon. The aim of the invention is to reduce costs and improve measurement accuracy by simultaneously measuring two squares and not using a reference square. Before the measurement, the square under study is connected to the second L-shaped square in such a way that their inner sides form a quadrilateral, the natural standard of the angle 2 is used as a reference (Г, and the deviation from perpendicularity is measured by determining the deviation from perpendicularity of the sides of the quadrilateral the following relations f - 4 (3a, -aj-a, -a), z I -. + Za, -a, -a), where b. b and 1 il. 2 ° A. deviations from the perpendicularity of the first and, respectively, second angles, the measurement angle readings. (L § to S Ob yu

Description

"

The image relates to the measurement technique and can be used to measure the deviation from the perpendicularity of T-shaped gons.

The aim of the invention is to reduce costs and increase the accuracy of measurements by measuring the two squares at the same time and not using them when measuring the standard angle.

The drawing shows schematically a device for carrying out a method for measuring the deviation from the perpendicularity of an L-shaped gon.

The device contains a base plate 1, on which are fixed the stops 2-4 and the tripod 5 with the measuring node 6,

The method for measuring the deviation from the perpendicularity of the G shaped coal NIKOV is as follows.

Before the measurement, the test square 7 is connected to the second (non-reference) square 8 so that their internal sides form a quadrilateral. The outer sides of the squares are also an image of a comfort quadrilateral. Measuring deviations from the perpendicular to the squares are made by determining the deviations from the perpendicularity of the sides of the quadrilateral. For this, interconnected L-shaped squares 7 and 8 are placed on the base plate 1, pressing them with side A to stops 2 and 3, and side B to the stop 4. After this, readings of measurement angle 6 are taken. Then the connected squares 7 and 8 are rotated relative to the base plate 1 and the stops, pressed by side B, to stops 2 and 3, side AJ - to stop 4 and taking readings by turning the squares

7 and 8, press them with side Aj to stops 2 and 3, side B to support 4, and take readings a. Then again turning the squares 7 and 8, press them with side B to stops 2 and 3, side A, to stop 4 and take the last reading a,

As a standard, a natural angle standard of 2 is used as a reference, knowing that

It, - "jt rrgfl

P, + /, + /, "27

2

de o,, D l, (y: ,, v. external angles

chfte; sugolnika formed by the connection of L-shaped squares 7 and 8;

/ (internal angles of this quadrilateral.

It's obvious that

but; C + H; (, 2,3,4). (2) de a. - measuring readings

node

C is some constant value;

  - the deviation from the perpendicularity of the angle / 3 ;, On the other hand, since

WITH

(,), e - -f

 2 L

(i 1, 2, 3, 4),

L is the length at which the deviation is determined, then from the first equation (1) it follows 5 that

one" . B „. . k

 ABOUT

(3)

 4 0.

The right and right parts of 5 alphabets (2) and taking into account equation (3) 5 we obtain

a, + aj-t-a3 + a 4 s

C -4 (a, -fra2 + a5 + a,).

(four)

Based on equations (2), we obtain

50

,, and, - With

(five)

Substituting expression (5) in formula (5) by formula (4), we have.

C °° 4, -a3-a) Cn-g (-a -} - Za, -a, -a).

2 З

(6)

If calculated by the formulas (6; the value (; (i, i, 2) is a positive value, nth number, this means, then /}; jIf the same, then |

Claims (1)

Invention Formula The method of measuring the deviation from perpendicularity of L-shaped squares, which consists in comparing the investigated square with a standard by means of the stops and measuring unit, characterized in that, in order to reduce costs and improve the accuracy of measurement, the square under study before measurement connected to the second G-shaped gon so that their inner sides form a quadrilateral and, as a reference, use EU The natural standard of the angle is 21, and the measurement of the deviation from the perpendicularity is carried out by determining the deviation from the perpendicularity of the sides 5 of the quadrilateral according to the following relations  (, -a, -a), (-a, + 3a, -a, -a,). ten Where Ij, H,, C JT - deviations t 1 (71 FROM the perpendicularity of the first and second respectively squares, I - readings of the measuring unit. Compiled by E. Vakumova Editor N. Egorova Tehred M. Parotsay s1k1G993 / 51 Circulation VNIIPI State Committee CCLF for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Branch PPP Patent, Uzhgorod, st. Project, 4