SU1620836A1 - Apparatus for contactless checking of parameters of filamentous material - Google Patents

Abstract

The invention relates to a measurement technique using optoelectronic methods for monitoring the parameters of a thread-like material, and can be used on textile enterprises in laboratory conditions. The purpose of the invention is to improve the accuracy of measurement of the parameters of the filament material. The device comprises an illuminator 1 with a parabolic reflector 2, a system of mirrors 3, 4, a switch 5 of flow 6, a first lens 7, a control o-calibration element 8, a trihedral prism 9, a lens 10, a parabolic mirror 11, a guide 12, an integrating sphere 13, selective photodetectors 14, 15, second lens 18 and electronic recording equipment 19. 1 Il. and SS (L s 72 O5 S o 00 Co Le

Description

The invention relates to a measurement technique using optoelectronic methods for monitoring parameters of a filamentous material, and can be used on textile enterprises in laboratory conditions.

The purpose of the invention is to improve the accuracy of measurement of the parameters of the filament material.

The drawing shows a device for controlling the parameters of the thread.

The device contains an illuminator 1, installed at the focus of a parabolic reflector 2, a unit forming the working and reference light streams along the light flux in the form of a system of flat mirrors 3 and 4, the light flux switch 5, and further along the working light flux 6 the first lens 7 control and calibration element 8, the focusing unit of the working light flux, made in the form of a triangular prism 9 with an annular reflecting surface, on the entrance face of which a lens 10 is mounted, and on the output - a parabolic mirror 11, a filament guide 12, which is a solid tube with a transparent section in the measurement zone, a photo-receiving unit in the form of an integrating sphere 13, in which selective photodetectors 14, 15 are installed and along the axis of which passes a guide so that the transparent a plot (the measurement zone is at the focus of a parabolic mirror 11 and the integrating sphere 13, which has an opening 16 for receiving the reference luminous flux

17, guided by a second lens

18, and the electronic recording equipment 19. All elements, except for the electronic recording equipment 19, are enclosed in a light-dustproof housing (not shown).

A device for controlling the parameters of the filamentary material works as follows.

The luminous flux from the illuminator 1, located at the focus of the parabolic reflector 2, is converted by it into a parallel luminous flux, fasting onto the system of flat mirrors 3 and 4j that form two independent luminous fluxes — working 6 and reference 17. Both luminous fluxs enter the switch 5, by function which is alternate overlap. Worker

0

five

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five

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five

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five

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five

The flow 6 enters through the switch 5, the focusing lens 7 on the lens 10, which forms a parallel stream of light on the annular reflecting surface of the prism 9. The prism 9 forms a cylindrical stream of light and directs it to the parabolic mirror 11, which focuses it in the area of the transparent section 12, the filamentary material 21 passes through the rollers 20. At the focus of the parabolic mirror 11, the luminous flux intersects the filament material 21, the thickness and linear plane of which changes its intensity b, and enters the integrating sphere 13, where it forms a light field of uniform intensity. The reference luminous flux 17 through the switch 5, the focusing lens 18 and the aperture 16 also enters the integrating sphere 13. The light field from the incoming alternately to the integrating sphere of the worker 6 and the reference 17 light flux is recorded by selective photoreceivers 14 and 15. Signals from selective photoreceivers 14 and 15 They are recorded by electronic recording equipment 19, which stores the values of the signals from the worker 6 and from the reference 17 light fluxes, and then determines the parameters of the filamentous material 21 by the difference of these signals.

 Since the calculation of the parameters of the filament material 21 is made from the difference in signals from the same selective photodetectors 14 and 15, alternately illuminated by working 6 and reference 17 light beams, the characteristics of the photodetectors change. 14 and 15 are compensated by the calculation. Before starting the operation of the device in the absence of filamentous material in the measurement zone, its initial setting is made (installation using lens 18. At the same time, the magnitude of signals from photodetectors 14 and 15 from working 6 and reference 17 rays must be equal (the difference between is equal to zero.) The control and calibration element 8 is used, if necessary, to monitor the measuring channel (the passage channel of the working beam).

Thus, the proposed device allows to increase the accuracy of measurement of parameters of the filament material.

Claims (1)

Invention Formula A device for contactless monitoring of parameters of a thread-like material, 5 containing an illuminator and a first lens sequentially arranged along the light flux, a control and calibration element, an optical unit inside it, by selective photocells, and electron-recording equipment, electrically connected with a photodetector unit, characterized by the fact that, in order to increase the control accuracy, it is equipped with a parabolic reflector, in which the illuminator is located, and focusing the working luminous flux, established by the light flux by the working and reference light flux formation unit, made in the form of a system of flat mirrors with a light flux switch, followed by a lens located along the reference light flux, and the integrating sphere is made with a hole for introducing the reference light flow. made in the form of a triangular prism with an annular reflecting surface and a lens on the input face and a parabolic mirror on the output face, guiding the filaments in the form of a solid tube with a transparent section in the measurement zone, a photodetector unit in the form of an integrating sphere with installed by the flow of the light flux by the working and reference light flux formation unit, made in the form of a system of flat mirrors with a light flux switch, second lens, located along the reference light flux, and the integrating sphere is made with a hole for introducing the reference light flux.