SU896688A1

SU896688A1 - Device for indication of magnetic tape quantity

Info

Publication number: SU896688A1
Application number: SU802928134A
Authority: SU
Inventors: Алексей Аврамович Реденский; Игорь Васильевич Чуманов; Василий Федорович Андрущенко
Original assignee: Предприятие П/Я В-8071
Priority date: 1980-05-22
Filing date: 1980-05-22
Publication date: 1982-01-07

Description

(54) УСТРОЙСТВО ДЛЯ Ш1ДИКАЦИИ КОЛИЧЕСТВА МАГНИТНОЙ ЛЕНТЫ(54) DEVICE FOR DETERMINING THE QUANTITY OF MAGNETIC TAPE

1one

Изобретение относитс к накоплению информации, а именно к устройствам дл индикации количества магнитной . ленты.The invention relates to the accumulation of information, namely, devices for indicating the amount of magnetic. tapes.

Известно устройство дл индикации количества магнитной лепты, содержащее датчик положени магнитной ленты, соединенный через преобразователь с г.ндикатором ll.A device for indicating the amount of magnetic mite, comprising a position sensor of a magnetic tape, is connected via a converter to the indicator ll.

Известное устройство имеет относительно простую конструкцию, однако не позвол ет обеспечить достаточную простоту его обслуживани .The known device has a relatively simple design, but does not allow for sufficient simplicity of its maintenance.

Известно также устройство дл индикации количества магнитной ленты, содержащее датчик положени магнитной ленты, подключенный ко входу формировател импульсов, выход которого соединен через включенные последовательно и попеременно лог-ические преобразователи и триггеры с первым входом одновибротора, подключенного выходом к дес тичному реверсивному счетчику , подсоединенному ко входам блокаIt is also known a device for indicating the amount of magnetic tape, containing a magnetic tape position sensor, connected to the input of a pulse shaper, whose output is connected via serially and alternately log converters and triggers to the first input of a one-shot, connected to an output to a decisive reversible counter connected to block inputs

цифровых индикаторов и к выходам суммировани , вычитани и начальной установки блока управлени , соединенного другими выходами с лентопрот жным механизмом. Это устройство позвол ет обеспечить относительную простоту процесса управлени им 2}.digital indicators and to the outputs of the summation, subtraction and initial installation of the control unit connected by other outputs with a tape drive mechanism. This device allows for the relative ease of managing it 2}.

Недостаток подобного устройства состоит в значительной погрешности индикации количества магнитной лен10 ты.The disadvantage of such a device is a significant error in indicating the amount of magnetic tape.

Цель изобретени - уменьшение погрешности индикации количества магнитной ленты.The purpose of the invention is to reduce the error in indicating the amount of magnetic tape.

Указанна цель достигаетс за This goal is achieved in

15 счет того, что в устройство дл индикации количества магнитной ленты введены пол ризованные реле, выполненные с контактными группами, подключенными ко входам триггеров, 15 due to the fact that polarized relays, made with contact groups connected to the trigger inputs, are inserted into the device for indicating the amount of magnetic tape,

Claims

20 unit of signal fronts and elements, And, the unit of signal fronts separation is connected to the summation and subtraction outputs of the control unit, to the second input of the single-oscillator, to the contact groups of polarized relays and to the first inputs of elements And, the second inputs of which are connected to triggers, and the outputs are with windings of polarized relays. The drawing shows a diagram of a device for indicating the amount of magnetic tape, one of the possible options. The device contains a sensor 1 of the position of the magnetic tape 2 connected to the input of the driver 3 pulses. The output of the pulse former 3 is connected via logic transducers 4 and triggers 5 connected in series and alternately with the first input of the one-oscillator 6. The one-oscillator 6 is connected to the output of a decimal parallel counter 7 connected to the inputs of the digital indicator block 8 and to the outputs of the summation, subtraction and initial settings control unit 9 connected by other outputs with a tape drive mechanism 10. The proposed device also contains polarized relays made with contact groups 11, n Connected to the inputs of the flip-flops 5, and with the windings 12, the block 13 of the signal edge and elements 14. And the block 13 of the edge of the signal is connected to the outputs of the summation and subtraction signals of the control unit 9 to the second input of the single-oscillator 6, to the contact groups 1I polarized relays and to the first inputs of elements And 14. The second inputs of elements And 14 are connected to triggers 5, and the outputs to windings of 12 polarized relays. In the proposed device, in the process of moving the magnetic tape 2, pulses characterizing its position are fed to the decimal reversible counter 7. The decimal reversible counter 7, depending on the direction of movement of the magnetic tape 2, operates in the mode of summation or SEARCHING, and its state 4 is highlighted by a block of 8 digital indicators. At the same time, due to the presence of polarized relays, a ten-meter reversible counter ensures that its state is maintained in the event of a temporary loss of supply voltage. The use of the invention makes it possible to significantly reduce the error in indicating the amount of magnetic tape. The invention The device for indicating the number of magnetic tape, containing a magnetic tape position sensor, is connected to the input of the impuser; Ls, the output of which is connected through logical transducers and triggers connected in series and alternately to the first input of the single-oscillator connected to the output of a ten-meter reversible counter connected inputs of the digital indicator unit and to the outputs of the summation, subtraction and initial installation of the control unit connected by other outputs with the tape A rotary mechanism, characterized in that, in order to reduce the indication error, polarized relays are introduced into it, the contact groups of which are connected to the trigger inputs, the signal edge extraction unit and the AND elements, and the signal edge extraction unit is connected to the summation and subtraction outputs of the unit control, to the second input of the one-shot, to the contact -groups of the polarized relays and to the first inputs of the And elements, the second inputs of which are connected to the triggers, and the outputs with the windings of the polarized relays. Sources of information taken into account in the examination 1. Japanese Patent No., cl. 102 E93, 10.01.77.

2. USSR author's certificate for application number 2598966 / 18-10, cl. G 11 V 27/20, 03/04/78 (prototype)