SU1518672A1 - Pneumatic jet-pipe pickup of position - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control the position and shape of objects in space. The purpose of the invention is to improve the positioning accuracy and sensitivity. The compressed air exhausts in the direction of the test surface of the part 10 through the nozzle 3 formed by the housing 1 and the insert 2 eccentrically located in it. The pressure at the inlet 5 to the receiving channel 4 is determined mainly by the position of the test surface relative to the maximum gap 8. With free air flowing through the gap 8, due to the ejection, the pressure at the inlet 5 is negative, and at the moment of overlap by the projection becomes positive. 1 il.

Description

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The invention relates to a measurement technique and can be used to control the position and aorma of objects in space, for example, in automating production processes.

The purpose of the invention is to improve the accuracy of position determination and increase sensitivity.

The drawing shows the sensor, a general view.

The pneumatic string position sensor contains a hollow body 1, a cylindrical insert 2, which forms an annular feed nozzle 3 with the case, a receiving channel 4 in the insert, an inlet 5 in which is located at one end of the insert, and an outlet 6 at its other end.

Box 2 is located eccentric to housing 1, so that the gap between it and the housing is variable. Near the minimum gap 7 at the end of the insert there is an entrance 5 to the receiving channel, which is offset relative to the axis 00 of the insert. Diametrically opposed to the minimum case and the insert form the maximum gap 8. In the case there is an opening 9 for supplying compressed air.

The sensor is placed above the test surface of the part 10 and compressed air is fed into the opening 9, which flows through the nozzle 3 in the direction of the test surface. In the position shown in the drawing, through the maximum gap 8 there is a more powerful stream of air, which, failing, carries the jet

flow less power from the gap 7. In this case, the pressure taken by the channel 4 from the inlet 5, is negative.

When the protrusion of the monitored surface turns out to be under the gap 8, a powerful air flow from this gap is reflected from the monitored surface and raises (twists) a jet of lesser power flowing through the minimum gap 7, creating a discretely increased positive pressure at the inlet 5 of the channel 4.

Such a relay characteristic makes it possible to increase the position determination accuracy and to increase the output signal power due to the fact that the insert is eccentric to the housing and the entrance to the receiving channel is located near the minimum clearance of the insert with the housing.

25 Formulation 11 11

Pneumatic inkjet position sensor, comprising a hollow body, a cylindrical insert forming an annular feed nozzle with the case, and a receiving channel in the insert, the entrance to which is offset relative to the axis of the insert, characterized in that, in order to improve the position determination accuracy and increase sensitivity, the insert is located eccentric to the housing, and the entrance to the receiving channel is located at the insert end near the minimum gap between it and the housing.

Claims (1)

Claim A pneumatic jet position sensor comprising a hollow body, a cylindrical insert forming an annular feed nozzle with the housing, and a receiving channel made in the insert, the entrance to which is offset relative to the axis of the insert, so that, in order to increase the accuracy of determining the position and to increase sensitivity, the insert is eccentric to the housing, and the entrance to the receiving channel is located at the end of the insert near the minimum gap between it and the housing. "·