SU855373A1 - Method of checking bubble level precision - Google Patents

Description

(54) METHOD FOR CONTROL OF ACCURACY OF BUBBLE

one

The invention relates to a measurement technique, in particular to methods for controlling the accuracy of bubble levels, and can be used, for example, to control the accuracy of ampoules of bubble levels.

A known method for controlling the accuracy of a bubble level is that the level is inclined relative to the measuring goniometric device and the error of the bubble level is determined by comparing its readings with the readings of the goniometric device {I.

This method has low productivity, low accuracy due to the need to repeatedly tilt the level at specified angles with high accuracy, and read the level readings from the goniometric device.

The purpose of the acquisition is to simplify the method and increase the accuracy of control.

In order to achieve this goal, the slope of the level is made by moving the surface of its ampoule along its calculated arc, and the error of the bubble level is determined by the position of the level bubble relative to the fixed scale of the angle gauge.

LEVEL

FIG. 1 and 2 shows a scheme for controlling levels, the magnitude of the radius g of the curvature of the surface of the ampoule which coincides with the calculated value of R; in fig. 3, 4 - scheme of level control, the magnitude of the radius r of the curvature of the surface of the ampoule which is smaller

5 estimated value of R; in fig. 5, 6 - level control scheme, the magnitude of the radius g of the curvature of the surface of the ampoule which is larger than the calculated value R.

The level containing the ampoule I with the scale 2 and the bubble 3 is installed on the angle measuring device with the fixed scale 4 to the initial (zero) position. The vial 3 of ampoule 1 is on the zero mark on the scale 2 of ampoule 1 and occupies a symmetrical position relative to the zero mark on the non-J5 movable scale 4 measuring goniometric device. Then the level (or ampoule) is tilted at an angle,, moving the controlled surface of ampoule 1 along its calculated arc, for example, of radius R. The accuracy control of the lumpule (or

20 levels) are produced according to the position of the bubble 3 relative to the fixed scale 4 of the measuring goniometric device as continuously throughout the entire scale of the meter

the level of a slow movement of the surface of its ampoule along its calculated arc, and discretely, at certain points of the range.

The position of the bubble 3 ampoule 1 of a relatively fixed scale 4 remains unchanged when the ampoule is precisely manufactured, i.e., if the curvature radius coincides with a controlled ampoule of level 1 ampoule calculated with this ampoule. In the case of a mismatch between the radius of curvature of the arc of the monitored surface of the ampoule and its calculated value, the position of the bubble 3 of the ampoule 1 relative to the fixed scale 4 changes. When the sign of the error of manufacturing the ampoule coincides with the sign of the angle of inclination of the ampoule (Fig. 4) and, conversely, with R-g, the sign of the error of manufacturing the ampoule does not coincide with the sign of the angle of inclination of the ampoule (Fig. 5).

Claims (1)

1. USSR author's certificate No. 405011, cl. G 01 B 5/24, 1970 (prototype). FIG. y / mw //////. FIG. year