SU1597931A1 - Device for determining quantity of tape record carrier on cores - Google Patents

Abstract

The invention relates to the field of accumulation and can be used to determine the number of tape recording media on cores. The purpose of the invention is to improve the accuracy of determining the number of tape media. The signals generated by the photosensitive triangles 1 are determined by the area of their illuminated surface, which depends on the external diameters of the rolls of the recording media placed on the cores 3. During the rewinding of the recording media, the illuminated surface of the photosensitive triangle 1 decreases, the edge 5 of which is placed in the plane rotation of the receiving core 3, and an increase in the illuminated surface of the photosensitive triangle 1, the edge 5 of which is located in the plane of rotation along ayuschego core 3. Thereby photosensitive triangles 1 generate signals describing the number peremonnogo tape recording medium and the direction of its winding. 1 il.

Description

The invention relates to storage | information, namely, devices for determining the number of tape recording medium on the cores j.

The aim of the invention is to improve the accuracy of determining the number of tape recording media on the cores. 10

The drawing shows the proposed device for determining the number of tape recording media on the cores.

The device comprises lamellar 45 light sensors made in the form of photosensitive triangles 1, connected by ribs through a dielectric strip 2 and located against the cores 3 of the tape drive 20 mechanism, on which a tape recording medium, for example magnetic tape, is placed in the form of rolls. In this case, the dielectric gasket 2 is located at an acute angle to the line 4 passing through the axis of rotation of the cores 3.

The photosensitive triangles are in the form of right-angled triangles, the hypotenuses of which coincide 30 with the edges of the plate-type light sensors “conjugated through a dielectric spacer 2. The first opposite ribs 5 of the photosensitive triangles 1, which coincide with the first 35 legs of the right-angled triangles, are parallel in the planes of · axes, rotation of the cores 3. The second opposite ribs 6 of the photosensitive triangles 1 coinciding with the second legs of rectangular triangles are located in parallel to the tangent planes to the diametrically opposite sides of the outer surfaces of the cores 3. 45 A device for determining the number of tape recording media on the cores works as follows.

The signals formed by photosensitive ~ 50 triangles 1 are determined by the area of their illuminated surface, which depends on the external diameters of the rolls of tape recording media placed on cores Z.55

During the rewinding of the tape recording medium from one core 3 to another, the outer diameter of the roll of the tape recording medium on the feeding core 3 decreases and the outer diameter of the roll of the tape recording medium on the receiving core 3 decreases. In this case, the illuminated surface of the photosensitive triangle 1 decreases, the first rib 5 which is placed in the plane of the axis of rotation of the receiving core 3, and an increase in the illuminated surface of the photosensitive element 1, the first rib 5 of which placed in the plane of the axis of rotation of the supply core 3. Due to this, the photosensitive triangles 1 form signals characterizing the number of rewound tape recording medium and the direction of its rewind.

The use of the invention by reducing the measurement error at the beginning and end of the rewind of the tape recording medium allows to increase the accuracy of determining its quantity on the cores 3 of the tape drive mechanism.

Claims (1)

Claim A device for determining the amount of tape recording medium on the cores, containing plate light sensors, mating ribs through a dielectric spacer and an arrangement against the cores on which the tape recording medium is arranged in the form of rolls, characterized in that, in order to increase the accuracy of determining the quantity of the recording medium tape, plate light sensors are made in the form of photosensitive triangles, the first opposite edges of which are parallel to the planes of the axes of rotation cores, the second opposite edges of the photosensitive triangles are located in parallel tangent planes to the diametrically opposite sides of the outer surfaces of both cores.