SU1401082A1 - Sensor of linear density of fibrous product - Google Patents

Abstract

The invention relates to textile industry. The purpose of the invention is to improve the measurement accuracy. The linear density sensor contains a radiation source and a photodetector that are optically coupled to a unbranched &

Description

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measurement

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The corresponding ends of the corresponding light guides 3 and 4, the branched ends of which are embedded in the housing 1 form the funnel, symmetrically along its perimeter and diametrically opposite. The sensor is equipped with an internal end 5 with a fixed angle of rotation and holes 6 located opposite the ends of the branched light guides embedded in the body of the forming funnel, and

Also, additional light guides 7 placed in a recess on the outer surface of the ring 5, the ends of which are offset at a fixed angle relative to the holes and facing towards the ends of the branched light guides. Rotating the ring 5 allows the control of the parameters of the source and photodetector without disrupting the process, 5 Il.

FIELD: textile industry.

The purpose of the invention is the measurement accuracy,

Fig, I shows the counter, the appearance; Fig, 2 - section A-A on .fig, 1; in fig. 3 and 4 is a section BB in FIG. 2, respectively, in the measurement and control; FIG. 5 shows the arrangement of additional light guides.

The linear density sensor includes a housing I forming a funnel, fixedly mounted on the arm 2 ,. radiating 3 and receiving 4 optical fibers fixed diametrically opposite in housing 1, a movable inner ring 5 with diametrically opposite holes 6 filled with a light-guiding filler, additional light guides 7 located in a recess (in grooves) on the outer surface of the inner ring 5 and diametrically inserted ends, a knob 8 rigidly connected to the inner ring 5, slots 9 in the lateral plane of the inner ring 5 with fixing screws 10, a tape 11 placed inside the ring 5 (radiation source), LED 12 and photodetector (photodiode) 13, mounted on fixed ends of optical fibers 3 and 4 and connected to the corresponding electronic sensor units (not shown),

For the sake of clarity and simplification of the image, the sensor is made with branched light guides.

The sensor works as follows

Before starting work or periodically during work using manual2

8, the inner ring 5 is rotated at an angle tp to the Control position. In this case, the ends of the additional optical fibers 7 are aligned with the ends of the optical fibers 3 and 4 integrated into the housing 1 of the shaping funnel, and the radiation flux from the optical fiber 12 passes through the radiating optical fiber 3, additional optical fibers 7 and receiving light guide 4 to photodiode 13; By adjusting the power of the light guide 12 or the photoamplifier force factor (not shown), set the reference value of the output signal on the recording device, for example, equal to the nominal lin value In this case, the additional density of the tape, 7, can fulfill the role of a specific standard used in calibrating the sensor by attenuating the radiation flux passing through them.

After that, the handle 8 is transferred to the Measurement position. In this case, the openings 6 of the movable inner ring 5 are aligned with the ends of the radiating and receiving light guides 3 and 4 and the radiation flux from the LED 12 passes through the radiating light guide 3 through the controlled tape 11 and the receiving light guide 4 to the photodiode 13.

Claims (1)

Invention Formula The linear density sensor of the fiber product, containing a radiating fiber, the branched ends of which are embedded in the body of the forming funnel, and the common end is connected to the radiation source, and the receiving light guide, the branched ends of which are embedded in the body of the forming funnel and The diametrically oppositely branched end of the radiating light guide is located around its perimeter, and its common end is connected to the photoreceiver, while the ends of the branched ends of the light guides are placed on the inner surface of the forming funnel, characterized in that, in order to improve the accuracy of measurement, it is provided with a ring having an outer diameter equal to the inner diameter of the cylindrical part of the forming funnel, in the walls of which, by the number of branched ends of the optical fibers in the diametric direction, uniformly around the perimeter of the outlet filled with holes and up to 2 complementary light guides, the number of which is two times smaller than the number of holes in the ring, the ring being installed inside the cylindrical part of the forming funnel with the possibility of rotation at a fixed angle relative to the funnel body, on the outer side surface of the ring grooves for placing additional light guides with their ends located on the outer surface of the ring, while the angle between the axes of the adjacent aperture and the end face of the fiber is equal to the angle of rotation of the ring, and the axis of the ends of all the fibers and holes lie in the same plane. Puz.i ten Montrol (Piis.