SU1453170A1 - Pneumatic method and apparatus for measuring lateral dimensions of moving articles - Google Patents

Abstract

The invention relates to a measurement technique and can be used to measure the transverse dimensions of a moving article. The purpose of the invention is to provide the ability to control products of complex configuration by centering them with respect to the measuring nozzles. Measuring nozzles 3 and 4 with the help of aerostatic supports 5 and 6 are installed with gaps S relative to the controlled surfaces of the moving article 9, In a niche. 13-16 serves the gas, the pressure of which on the controlled product provides the balancing of the forces acting vertically and horizontally. The node 11 according to the algebraic sum of the distance between the nozzles 3 and 4 and the gaps S fixes the transverse size of the product 9. 2 sec. f-ly, 2 ill. from iS 4: 01 00

Description

i The invention relates to a measuring technique and can be used to measure the transverse dimensions of moving products of asymmetrical n) in the process of their manufacture, for example, belts, rods, polymer-Hiix shells, etc.

The purpose of the invention is to expand the use of () the scope of use by providing the ability to control products of the above-mentioned configuration by centering them relative to the measuring nozzles.

FIG. Figure 1 shows a measurement scheme of a product with four G) bases; in fig. 2 - principle device sdem.

The device for measuring the transverse dimensions of Hiox contains sensitive elements 1 and 2 with measuring instruments L) 1 and 3 and 4, equipped with aerostatic supports 5 and 6, respectively, sensors 7 and 8 of the gaps S between the nozzles MJJ 3 and 4 and the product under test 9 and the distances between the nozzles 3 and 4, the adder 10 sensor readings, the node 1 reference, the sensors 12 pressure. The nozzle 3 and 4 are located opposite and installed with the possibility of moving along its own axis.

 In the aerostatic bearings 5 and 6, on the side of the measuring nozzles 3 and 4, in a plane perpendicular to the direction of movement of the product 9 (in the plane of the drawing), 13–16 "are installed on which pressure sensors 12 are installed. Adjustable throttles are installed at the entrance to the Bi niches of the gas supply pipelines. 17. The niches are profiled on the equidistant surface of the sample controlled product.

From the source of compressed gas, the gas is supplied to the measuring nozzles 3 and 4 and to the entrances to the niches 13-16, where it is throttled at adjustable throttles to certain pressures, the quantities to which are determined from the conditions of mutual balancing of the pressure forces acting on both the sides of the measuring nozzles 3 and 4 and on both sides of the lines perpendicular to the axis of the measuring nozzles.

Under the action of these pressures, the test article is centered relative to the axis of the Shelter of the measuring nozzles, and in the case of the product 9 moving along the axis

The op amps measuring nozzles 3 and 4 are displaced on the sensing elements 1 and 2 approximately synchronously with the displacement of the product, maintaining approximately the gaps S. Constant; The lateral size is determined by means of sensors 7 and 8 and adder 10 as the algebraic sum of the distance between the measuring nozzles 3 and 4 and the gaps S between the nozzles and the item being monitored.

Consider the implementation of the proposed method as applied to the control of a product with four flat-based faces.

The equilibrium condition of the controlled product is the equality of the sum of all the forces acting on it to zero (Fig. 1):

F; + t, -f F, 0 (1)

Rectifying forces F,, Fj ,, F, F on the axis ОХ and ОУ, get the system of equations

F, cosoi - - Fjcosy + + F4CosA O; (2)

-F sinoL - F ,, sine + FjsinJ. + + F sinu 0 - (3)

After algebraic transformations, provided that the niche areas are equal to 13-16 and the areas equal to which the indicated pressures act, the dependences between the pressures in the chambers are obtained, ensuring the centering of the test article relative to the measuring nozzles:

P P C25.

2. COS

cos

 „I: ua u

P Pi —Sn J.

Q

five

0

 /.tV-sinCoi. ) where m iiinC J + u) Before starting the measurement, set the required clearances S between the measuring nozzles 3 and 4 and the controlled product 9, using adjustable chokes 17 — the required pressures P, Pj, Pj, P in the niches 13- sixteen.

In the process of measurement at fixed positions of the throttles 17, the gas flows from the niches to the monitored product ensure its centering relative to the measuring nozzles.

314531

which eliminates the measurement error associated with the displacement of the controlled product in space.

Claims (2)

1. A pneumatic method for measuring the transverse dimensions of a moving product, which consists in directing gas flows to the surface of the controlled product, which center the product relative to positively directed measuring nozzles, and the transverse size is determined by the algebraic sum of the distance between the measuring nozzles and the gaps between the nozzles and the controlled product, characterized in that, in order to expand the field of use by providing the ability to control products of complex configuration, Different pressures of gas flows are controlled product, and pressure values are determined from the conditions of mutual equilibrium 0 five five 704 shivaniya pressure forces acting on both sides of the measuring nozzles and on both sides of the line perpendicular to the axis of the measuring nozzles. 2. A device for measuring the transverse dimensions of a moving product, containing two measuring nozzles arranged oppositely mounted for movement along their axis and equipped with aerostatic supports, gap sensors between the nozzles and the item being monitored, a clearance sensor readout unit and a reference unit connected to an adder , about t- The fact that in aerostatic bearings on both sides of the measuring nozzles in the plane perpendicular to the direction of movement of the controlled product, niches profiled equidistant to the surface of the model controlled product and equipped with pressure sensors and adjustable throttles on the inlet are made. 8x1 5/4 Yakz