SU1330465A1 - Optical transducer of circular movements of object - Google Patents

Abstract

This invention relates to instrumentation technology. The aim of the invention is to expand the measurement range and increase speed by continuously scanning around the circumference with the frequency of the sweep generator. With the help of illuminator 1, performed on a cathode-ray tube, the deflection system of which is controlled by a sinuso- generator 2. the long-distance voltage and the optical system 5 projecting a light spot from the screen of the cathode ray tube onto the object 6 with the reflector 7 fixed on it, a circular scan of the object 6 is performed. The photodetector 8, when the light beam hits the reflector 7, produces a pulse arriving at the phase detector 4, counting the phase of the pulse arrival relative to the reference signal from the sinusoidal voltage generator 2. 1 il. (L oo oo o 4 o: ate

Description

The invention relates to instrumentation engineering and can be used to measure displacements and to operatively monitor the position of an object making a rotary motion.

The purpose of the invention is to expand the range of measurable displacements and increase speed by continuously scanning around the circumference with the frequency of the sweep generator.

The drawing shows a diagram of the optical sensor of circular movements of the object,

The optical sensor for circular movements of the object contains an illuminator 1, made on a cathode ray tube, in which one of the orthogonal deviation channels is connected to the sinusoidal voltage generator 2, also connected to the input of the phase shifter 3 and the first input of the phase detector 4, the output of the phase shifter 3 is connected with another channel of the deviation of the cathode-ray tube, the optical system 5, which provides the projection onto the object 6 of the optical beam and the reflector 7, made in the form of a radial strip and fixed to the volume those photodetector 6 and 8, the output of which is connected to the input of the phase detector vtorm 4.

Optical sensor circular movements of the object works as follows.

A sinusoidal voltage generator 2 together with a phase shifter 3 provides the deflection of the light point on the screen of the cathode ray tube around the circumference, which, when projected by optical system 5 onto the rotating object 65j, provides for its scanning and when the beam hits the reflector 7 it is directed to the photodetector 8, producing them

Editor A. Revin

Compiled by O. Smirnov

Tehred I.Popovich Proofreader N.Korol

Order 3570/42 Edition 676 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 1 13035-, Moscow, Zh-35, Raushsk nab., d, 4/5

Production and printing company, Uzhgorod, st. Project, 4

pulse arriving at phase detector 4.

The phase of the pulse from the photodetector 8 is proportional to the angle if rotation of the reflector 7, t, e, of the object 6. Thus, the readings of the phase detector 4 are proportional to the measured angle cf,

The speed of the light point on the screen of the cathode ray tube is determined by the oscillator frequency, so the optical sensor allows to measure circular movements in the whole range of real speeds of the mechanisms, and since scanning is performed around the circumference, this makes it possible to measure angular movements of almost unlimited magnitude. ,

Claims (1)

Invention Formula Optical sensor of circular movements of the object, containing an illuminator and successively located along the light beam optical system, a reflector, attached to the object, and a photodetector, so that, in order to extend the measurement range displacement and speed, it is equipped with a sinusoidal voltage generator, a phase shifter and a phase detector, and the illuminator is made on a cathode ray tube, while the sinusoidal voltage generator output is connected to one of the orthogonal The output channels of the cathode ray tube, to the input of the phase shifter and to one of the inputs of the phase detector, the output of the phase shifter is connected to another channel of the deviation of the cathode ray tube, the output of the photodetector is connected to the second input of the phase detector.