RU4782U1 - DEVICE FOR NON-CONTACT MEASUREMENT OF LINEAR MOVEMENTS - Google Patents

Abstract

A device for non-contact measurement of linear displacements, comprising a transformer sensor and a signal converter, the output of which is connected to a display device, characterized in that the device contains a matching unit, the input of which is connected to the output of the transformer sensor, and the output is connected to the signal converter, the latter being made in the form of an electronic computing device, the output of which is connected to a display device.

Description

Contactless Measurement Device

-Poleshchad Moyel

refers to heat and can be

used for automation and control of transient power units, in particular for measuring the relative axial expansion of the turbine rotor, the absolute expansion of the bodies, etc.

It is known that currently using standard measuring instruments for the relative axial expansion of rotors of the СШР) turbines using differential transformer or inductive sensors, have a kind of disadvantages and therefore the task of improving the ORP meters is relevant.

The disadvantages of these meters should be: low accuracy, high sensitivity to interference; NEVER CHARACTERISTICS, LIMITED MEASUREMENT RANGE. These shortcomings arise from the principle of the sensors and the amplitude measurement method implemented in the meters / Oleynikov & G. Study of the influence of disturbing factors on the induction control systems of steam turbines: Auto ref. dis. for a job. scientist degrees of cand. tech. sciences. Kharkov, 1970 /.

The lowest in terms of technical nature and the achieved positive effect .. is

P1 meter of relative expansion of a turbine rotor with a spatially vector tracking method (see Scientific and Technical Achievements. Series Means of Control and Measurement. M.: L1 of Neck Displacements

VISH, 19Sh, s. 26-27).

This device contains a transformer output sensor from which an active transducer containing a system, including a transformer, motor and amplifier, as well as a tochosid transducer.

The sensor generates three variable voltages, the amplitudes of which vary as a function of the measured displacement. The signal, in the form of an EMF, is fed to the windings of the unit of the servo system. The engine through the gearbox rotates the rotor of the unit of operation, which operates in t {X1Hsfor {4 mode. The rotation angle of the selsyn rotor is proportional to the measured displacement. The rotation of the selsyn shaft is connected with a current-force converter. The normalized current signal changing in the function of the measured displacement is fed to the imaging device. The disadvantage of this device is the low speed. In addition, the presence of mechanical elements reduces the accuracy of measurements and the reliability of the device.

 Task /: is to increase the speed of work.

the inserted goal is achieved by the fact that in the known device for non-contact measurement of linear displacements, containing the same. a transformer sensor and a signal converter, the output of which is connected to a display device, unlike the known one, contains a matching unit, the input of which is connected to the output of the transformer sensor, and the output is connected to the sishalov converter, the latter being made in the form of an electronic computing device, the output of which is connected with imaging device.

The aforesaid allows us to conclude that the proposed differences are new. The 70th part of the proposed device consists in introducing new elements and elements} to and between elements. Used in. .. the device elements themselves are widely known. However, the foregoing set of all elements without exception and their value in the historians of the scientific, technical and patent literature available to authors has not been disclosed. The compensating compensating system described in the prototype with a space-vector tracking method implemented using electromechanical devices (amplifier, synchro, engine, gearbox) in the proposed device is replaced by electronic devices with direct measurement of the signals from the sensor and the calculation of linear displacements in the electronic computing device.

The block diagram of the device is presented on

FIG. one.

The device contains a transformer sensor I, the output of which is connected to the input of the matching unit, the output of which is connected to the input of the signal converter 3, which is made in the form of an electronic computing device. The transmitter inlet 3 is connected to the input of the imaging device 4.

The device operates as follows.

 i generates three components of the output signal of the alternating voltage in the form of an emf iS, th, E. On the communication lines s, d.s. iir, ii% ad8S) T in the settlement block 2, in which the variable stresses Um, S, Y.

 ) ese1

digital code. The digital code contains the following information: the average value of E,, SQ, taking into account the sign (the voltages are in phase or in phase with the reference voltage).

A digital code from the output of the matching unit 2, to the input of the signal converter 3, made in the electronic computing device, where the vector addition of three emfs occurs taking into account the sign, finding the direction angle of the summing vector and converting the angle to a linear value.

:, A device based on integrated circuits and microprocessor technology provides a speed of 0.0 s, an accuracy of 0.5; 1.1 times higher probability of uptime.

 / V 2 / 33I

Claims (1)

A device for non-contact measurement of linear displacements, comprising a transformer sensor and a signal converter, the output of which is connected to a display device, characterized in that the device contains a matching unit, the input of which is connected to the output of the transformer sensor, and the output is connected to the signal converter, the latter being made in the form of an electronic computing device, the output of which is connected to a display device.