SU873272A1 - Device for controlling magnetic tape tensioning - Google Patents

Description

one

The invention relates to the accumulation of information, namely, devices for controlling the tension of a magnetic tape.

A device for controlling the NIN of the tension of a magnetic tape is known, which contains electromechanical tension sensors connected through control units with electric motors to receive and feed into their SP assemblies.

The known device allows for relatively high control accuracy of the tension tape, however, it has a complex structure.

It is also known a device for controlling the tension of a magnetic tape containing elements And connected through memory blocks to the first inputs of the comparators, the outputs of which are connected via amplifiers to the motors of receiving-feeding units connected to the inputs of sensors, speeds and to the inputs of torque sensors.

connected to the second inputs of the Comparators, the element OR NOT, the input bus command stop and the input bus pulse frequency reference G2}. This device has a relatively simple structure, but its disadvantage is a considerable error in the control of the tension of the magnetic tape.

The purpose of the invention is to reduce the error in controlling the tension of a magnetic leite.

This is achieved due to the fact that the pulse and recording pulse separation unit, connected to the outputs of the speed sensors, is connected to the stop command input bus, to the first input of the OR-NOT element and to the first inputs of the AND elements, binary a counter connected to the input pulse bus of the reference frequency; a code-to-analog converter connected to the second inputs of the elements and a decoder. At the same time, the output of the IPI-NOT element is connected to the input of a binary counter, whose transducer is connected to the code-analogue converter input, and to the input of the decoder, which is connected by an output to the block of reset and write pulses and (Second input of the IGTI-NOT element, the third input of which connected to the input bus of the stop command. The drawing shows the proposed device for controlling the tension of the magnetic tape, one of the possible variants. The proposed device contains AND elements connected through blocks 2 pa1 to the first inputs parators 3, the outputs of which are connected via power amplifiers 4 to the electric motors of the receiver-5 nodes. The electric motors of the receiving-5 subsystems are connected to the inputs of the speed sensors 6 and from the output of the torque sensors 7 connected to the second inputs of the comparators 3, the proposed device also contains block 8 polling and recording pulses connected to the outputs of the speed sensors 6, to the stop command input bus 9, to the first input of the OR-NOT 10 element and to the first inputs of the AND 1 elements and the binary counter 41 connected to the input w another 12 pulses of the reference frequency. The output of the element OR NOT 10 is connected to the input of a binary counter 11, the output of which is connected to the input of the converter 11, the analogue code connected to the second inputs of the elements AND 1 The output of the binary counter I1 is connected In addition to the input of the decoder 14 connected to the output of block 8 pulses of reset and recording and to the second input of the element OR NOT 10, the third input of which is connected to the input BUS 9 stop command. In the proposed device, the reset and write pulse input unit 8 controls the binary counter 11 and the AND 1 elements. As a result, the signal from the converter 13 code-analogue alternately enters through the elements 1 to the memory blocks 2. The use of the invention makes it possible to significantly reduce the error in controlling the tension of a magnetic tape. Formula of the Invention Device to control the tension. a magnetic tape containing elements And connected through memory blocks to the first inputs of the comparators, whose outputs are connected through amplifiers to receiving motors of the receiver nodes connected to the input of the speed sensors and to the inputs of the Moment sensors connected to the second inputs of the Comparators OR element -NO, the input bus command stop and the input bus pulse frequency reference, differ-. This is so that, in order to reduce the control error, a block for the injection of reset and write pulses is inserted into it, connected to the outputs of the speed sensors, to the input bus of the stop command, to the first input of the OR-NOT element and to the first inputs of the elements And, a binary counter connected to the input bus of the reference frequency PULS, a converter codalog connected to the second inputs of the elements I. and a deshirator, more than the output of the element SH1I-NOT connected to the input of the binary counter, the output of which is connected to the input of the code converter alogi and to the input of decoder connected to the output of the isolation unit and write reset pulse and to a second input of OR-NO element whose third input is connected to an input bus GL stop command. , ; Sources of information taken into account in the examination 1. Kolischuk V. T. and others. Design and calculation of tape recorders. Kiev, Technique, 1965, p. 183-187. 2. The patent of France 2264353, cl. Q 11 V 15/43, 1975 (prototype).

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Claims (1)

The claims to. Tension control device. a magnetic tape containing AND elements connected through memory blocks to the first inputs of the comparators, the outputs of which are connected through amplifiers to the motors of the receiving and receiving units, connected * to the input of the speed sensors and to the inputs of the torque sensors connected to the second inputs of the comparators, the OR NOT, the input signal of the stop command and the input pulse bus of the reference frequency, characterized in that, in order to reduce the control error, it contains a reset pulse allocation and recording block connected to the output odes of speed sensors, to the input bus of the stop command, to the first input of the OR-NOT element and to the first inputs. AND elements, a binary counter connected to the input bus of the PULSES of the reference frequency, a code-to-analog converter connected to the second inputs of the I. elements and a decoder, and the output of the OR element is NOT connected to the input of the binary counter, the output of which is connected to the input of the code-analog converter and to the input of the decoder, connected by the output to the block of allocation of the reset and write pulses and to the second input of the OR-NOT element, the third input of which is connected to the input bus of the stop command.