SU1322090A1 - Pneumatic contactless transducer of distance to object surface - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control linear dimensions and movements. The purpose of the invention is to expand the functionality by increasing the range of controlled distances and eliminate the influence on the results of monitoring the heterogeneity of the object surface. into the equalization chamber 3 and through the nozzle 11 into the tank 10, where it is converted into an electric signal by the transducer 7. 1 h, n, f-ly, 1 sludge. C - ffpesucffjffupi / foafff p n the organizer of the organization. + I (Л С its N5 О; 0

Description

The invention relates to a measurement technique and can be used to control linear dimensions and movements.

The purpose of the invention is to expand the functional capabilities by increasing the range of controlled distances and eliminating the effect on the monitoring of surface object heterogeneity.

The drawing shows the proposed device.

The sensor comprises a housing 1 with a central channel 2, a balancing chamber 3 and openings 4, bonded to the housing 1 by means of a laid-on rail 5, a branch pipe 6, and a pneumo-electric transducer 7.

The equalizing chamber 3 communicates with the channel 2 by the holes 4, which are made at an acute angle to the axis 00 of the channel 2 in the direction from the inlet (from nozzle 6) to the exit from the channel. The central channel 2 is made in the form of a supersonic nozzle of the type of Laval nozzle with supersonic part 8 at the exit of the channel.

The equalizing chamber 3 is made of two parts: the first part is formed by an annular groove in the housing 1 and a ring 9 isolating the chamber from the external environment, and the second part is made in the form of a container 10, front side with the first part through the jet 11. The converter 7 is placed in containers 10.; The sensor works as follows

Through the pipe 6 into the channel 2 serves compressed gas with pressure, providing

supersonic gas flow velocity in the nozzle part 8 and long jet range. When a supersonic jet encounters an object of control (not shown), a system of shock waves arises in the jet, the pressure drops in which depend mainly on the average distance: and between the exit from the nozzle and the object of control. The pressure in the canape is transmitted through the holes 4 to the first part of the balancing

Editor A. Sabo

Compiled by V.Hordeev Tehred A. Kravchuk

Order 2853/36 Circulation 677 Subscription

VNMSHI USSR State Committee

for inventions and. Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and Printing Enterprise, Uzhgorod, st. Project, 4

chambers 3 and through the jet 1 to the tank 10, where they are converted into an electrical signal proportional to the specified distance. The nozzle 11 and the container 10 form an inertial link, the averaging local pressure in the supersonic part 8 of the nozzle in the exit zone of the holes 4 in it.

Thus, the passage of the channel in the form of a supersonic nozzle, the pressure in the supersonic part of which is transmitted to the surge chamber and perceived by the pneumoelectric transducer, allows an increase in the range of controlled distances and eliminates the effect on the results of monitoring the heterogeneity of the object surface.

Claims (2)

1. A pneumatic contactless sensor of the distance to the object's surface, comprising a housing with a central channel, a balancing chamber and openings communicating a balancing chamber with a central channel and made at an acute angle to the channel axis in the direction from the input to the output, and pneumatic-electric converter, characterized in that, in order to expand functionality by increasing the range of controlled distances and eliminate the influence on the results of monitoring the heterogeneity of the object's surface, the central channel is made in the form of a supersonic nozzle of the Laval nozzle type. on supersonic part of it. 2. Sensor pop. 1, characterized in that the balancing chamber is made of two parts, one of which is in the form of an annular groove and in the housing and the ring isolating it from the external environment is connected to the central channel, and the other communicates with the groove through the jet The pneumatic-electric converter is placed. Proofreader G. Reshetnik