SU1497452A2 - Contactless sensor of geometric dimensions of glass fibre - Google Patents

Abstract

The invention relates to a measuring technique and is aimed at improving the accuracy of a contactless photoelectric sensor of the geometric dimensions of glass fiber by electrostatically stabilizing its position in the zone of the focal bar formed by the optical system of the sensor. To ensure the stabilization of the controlled glass fiber 4 in the measurement zone, the fiber is passed through two pairs of bushings-electrodes 6, 7 and 8, 9 connected to the poles of the high-voltage source 5. Under the action of electrostatic forces arising in the gaps between these electrodes, the fiberglass is drawn into the region of a stronger electrostatic field, thereby stabilizing its position in the zone of the focal line and eliminating its vibrations and vibrations. As a result, the stability is increased and the interference pattern that arises in the plane of the receiving screen 3 is simplified. 2 Il.

Description

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FIG. one

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jTOJcaM DC 5 high voltage source. Under the influence of electrostatic forces arising

same but qi

Life stabilizes in the focal stroke zone and eliminates its vibrations and vibrations. Therefore

in the gaps between these bushings — electr — stability increases and is simplified.

By the way, fiberglass is drawn into the region of a stronger electrostatic field, due to which its invention relates to a measuring technique and is an improvement in the contactless photoelectric sensor of the geometric dimensions of fiberglass according to avt.S. No. 532,000.

The purpose of the invention is to improve the accuracy of measurement of dimensions by providing electrostatic stabilization of the position of the glass fiber in the zone of the focal line formed by the optical system of the sensor.

FIG. 1 presents the principle. ; Full sensor circuit; Fig, 2 - one of the pairs of sleeve-electrodes, the cut.

A contactless sensor of fiberglass geometric dimensions contains a monochromatic light source 1, an optical system 2 including at least one element having cylindrical symmetry in the plane of the perpendicular optical axis of the system, and a receiving e crane 3. The plane of symmetry of the said cylindrical element passing through cylindrical generatrix is inclined to the axis of the monitored -fibre 4 by an angle (/, where 20 °, and the aperture angle ip in this plane is 10. The sensor is equipped with a high-voltage source 5 current, and two pairs of 6, 7 and 8, 9 bushings electrodes connected to the source 5 and placed concentrically with controlled fiber 4 on both sides of the focal line formed by the optical system. Bushing electrodes b, 7 and 8, 9 are fixed on dielectric substrates 10 and 11, respectively, and connected by terminals 12 and 13 to the positive pole, and terminals 14, 15 to the negative grounded pole of source 5. To improve the efficiency of the electrostatic stabilization system, a glass-interference pattern appeared in the plane of the receiving screen 3. 2 Il.

The fiber 4 bushings-electrodes in pairs face one another with their hemispherical tips, and the axial holes in them are made narrowed.

The sensor works as follows

Controlled fiberglass 4 is passed through the holes in. pairs of electrodes 6, 7 and 8,, 9, as a result of which electrostatic forces occurring in the gap between these electrodes, when connected to source 5, fiber glass 4 is drawn into a region with a stronger electric field and is oriented in space in accordance with the configuration and charge of the bushing electrodes. The light from the monochromatic source 1 is formed with the help of the optical system 2 into a focal bar perpendicular to the axis of the fiberglass 4, while one part of the rays from source 1 is reflected from the outer surface of the fiberglass, and the other is refracted from inside the fiberglass and is reflected from its inner surface. As a result, interference bands are formed in the plane of the receiving screen 3, the distance between which depends both on the dimensions of the outer and inner diameters of the fiberglass to be tested, and on the distance between the fiber 4 and the receiving screen 3. Under the influence of the electric field formed between the pairs of bushings electrodes are provided. reliable stabilization of the position of the glass fiber 4 in the focal line, eliminates vibration in the radial plane and oscillations in the axial direction, as a result of which STABILITY increases and the observable on the receiving screen 3 interferes with the pattern, and the measurement accuracy is 1 times simpler.

Claims (1)

The sensor can find a wide application in precision engineering, electrical engineering and other fields to control the size of various extended objects in the process of their manufacture and in the presence of adverse control conditions - vibrations, shocks, impacts. Invention Formula Contactless sensor geometric dimensions. Glass fiber auth. No. 532000, that is, in order to improve accuracy — by electrostatic stabilization of the position, glass fiber — it is supplied with a high voltage source of direct current and two pairs installed on both. the sides of the optical system and the pbd-connected to the source of bushings-electrodes with hemispherical tips facing each other in each pair. Sfs) 7 (8) FU8.2