SU1376116A1 - Device for measuring magnetic tape meterage - Google Patents

Abstract

This invention relates to the accumulation of information. The purpose of the invention is to improve the accuracy of measuring the footage of a magnetic tape. The light reflected from the base of the magnetic tape 3 enters the photosensitive element 4, which forms pulses corresponding to its optical marks 2. After amplification, these pulses come from the top of amplifier 5 through the open element I I6 to the counter 33, which generates signals corresponding to a reading of tens of centimeters magnetic tape 3. In the winding mode to the left, the voltage from the third output of the switch 14 operating modes opens the elements And 20, 21, 22 and 23, which count down, respectively, the counters 33, 34, 35 and 36. 1 Il.

Description

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The invention relates to the field of information storage, namely, devices for measuring the footage of a magnetic tape.

The purpose of the invention is to improve the measurement accuracy of the metric area of a magnetic sheet;

The drawing shows a device for measuring the footage of a magnetic tape.

The device contains an illuminator 1 of optical labels 2 of magnetic tape 3, a photosensitive element connected by an output to an input of an amplifier 5, the output of which is connected via a switch 6 to an input of a counter 7 connected by an output to the first input of a comparison unit 8, a driver 9 of reference signals, conversion code - for example voltage, voltage regulator 11, power supply unit 12, electric motor 13, switch 14 operating modes and pulse generator 15. The comparator unit 8 is connected by a second input to the first output of the driver of the 9 reference signals and is connected by an output to the input of the converter 10 code - voltage. The output of the code converter 10 is the voltage connected to the first input of the voltage regulator 11 connected by the second input to the first output of the power supply unit 12 and connected to the output with the electric motor 13. The electric motor 13 is connected to the second output of the power supply unit 12 connected to the third output of the input of the switch 14 modes of operation.

The device also contains the first 16, second 17, third 18 and fourth 19 elements And connected by the first inputs to the first output of the operating mode switch 14, the second output of which is connected to the second input of the driver 9 of the reference signals connected to the input of the illuminator 1 of the optical labels 2 magnetic tapes 3, fifth 5, sixth 21, seventh 22, eighth 23, ninth 24, tenth 25, eleventh 26, twelfth 27, thirteenth 28 ,. fourteenth 29 and fifteenth 30 And elements, connected in series decoder 31 and indicator 32, first 33, second 34, third 35 and fourth 36 additional counters, shift register 37 and additional illuminator 38 optical labels 2 of magnetic tape 3. Fifth 20, sixth 21st, seventh

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22 and eighth 23 elements And are connected by the first inputs to the third output of the switch 14 operating modes connected by the second output to the input of the key 6. The ninth 24 and tenth 25 elements And are connected by the first inputs to the output of the amplifier 5. Additional illuminator 38 of the optical labels 2 of magnetic tape 3 connected to the fourth output output of the switch 14 modes.

In the device, the first output of the switch 14 operating modes is connected to the first inputs of the first 33, second 34 third 35 and fourth 36 additional counters connected to the outputs of the fifth 20, sixth 21, seventh 22 and eighth, respectively

23 elements I. The third output of the switch 14 operating modes is connected to the second inputs of the first 33, second

34, third 35 and fourth 36 additional counters connected to the outputs of the corresponding first 16, second 17, third 18 and fourth 19 elements I. The fourth output of the switch 14 operating modes is connected to the second input of the ninth element 24 connected to the third the inputs of the first 33, second 34, third 35 and fourth 36 additional counters. Outputs of the first 33 and second. 34 additional counters are connected to the inputs of the eleventh 26 and twelfth 27 And elements respectively and connected to the inputs of the decoder 31, the other inputs of which are connected to the outputs of the third additional counter 35 connected to the inputs of the thirteenth 28 and fourteen 29 elements And The output of the amplifier 5 is connected to the second inputs of the first 16 and the fifth 20 elements I. The output of the eleventh element And 26 is connected to the second inputs of the second 17 and sixth 21 elements And, The output of the twelfth el And 27 is connected to the second inputs of the third 18 and seventh 22 elements I. The output of the pulse generator 15 is connected to the second input of the tenth element And 25, connected by the output to the first input of the fifteenth element And 30, which is connected to the output of the thirteenth element II 28 and connected to the output of the first input of the shift register 37 connected by the second input to the output of the fourteenth element I 29 and connected to the output of the second inputs of the fourth 19 and eighth 23 elements I.

The illuminator I of the optical labels 2 of the magnetic tape 3 and the additional illuminator 38 of the optical labels 2 of the magnetic tape 3 are mounted with the possibility of affecting the base of the magnetic tape 3 from the side opposite to its working layer. The optical marks 2 are made in the form of optical strips perpendicular to the direction of movement of the magnetic tape 3 and located on its base with the same pitch. In this case, each thousand optical mark 2, corresponding to one hundred meters of magnetic tape 3, is made wider than other optical marks 2.

A device for measuring the footage of a magnetic tape works as follows.

In the start mode or in the rewind mode, from the fourth output of the switch 14 of operation modes to the additional illuminator 38 optical marks 2 of the magnetic tape 3 and to the ninth And 24 element the voltage is not applied, which prevents false zeroing of the first 33, second 34, third 35 and fourth 36 additional counters. At the same time, the voltage from the first output of the switch 14 of operation modes opens the first 16, second 17, third 1 8 and fourth 1 9 elements AND, which allow direct counting, respectively, of the first 33, second 34, third 35 and fourth 36 additional counters, The normal mode of operation of which is provided respectively by the fifth 20, sixth 21, seventh 22 and eighth 23 elements I. The voltage from the fourth output of the switch 14 of the operating mode goes to the driver 9 of the reference signals acting on the illuminator 1 of the optical labels 2 magnet This tape is 3, illuminating its base from the side opposite to the working layer. The light reflected from the base of the magnetic tape 3 enters the photosensitive element 4, which generates pulses corresponding to its optical marks 2. These pulses after amplification come from the output of amplifier 5 through the open first element 16 to the first accessory

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A counter 33, which generates signals corresponding to a reading of tens of centimeters of magnetic tape 3. The signals of the first additional counter 33, after being decrypted in decoder 31, are displayed by indicator 32.

Every tenth pulse corresponding to a binary combination 0000 at the outputs of the first additional counter 33 is fed to the inputs of the eleventh element And 26, at the output of which it is represented as a logical unit passing through the open second element And 17 to the second additional counter 34. The second The additional counter 34 forms at its outputs signals corresponding to the reading of units of meters of magnetic tape 3. The signals of the second additional counter 34 after decryption are displayed in the decoder 31 by the indicator 32.

Every tenth pulse corresponding to a binary combination 0000 at the Outputs of the second additional counter 34 is fed to the inputs of the twelfth element AND 27, at the output of which it is allocated as a logical unit passing through the third element And 18 to the third additional counter 35. The third The additional counter 35 generates at its outputs signals corresponding to a reading of tens of meters of magnetic tape 3. The signals of the third additional counter 35, after being decrypted in the decoder 31, are displayed by an indicator 32. When the binary combination 1010 at the outputs of the third additional counter 35, the fourteenth element And 29 forms a logical unit, recorded in the first digit of the shift register 37.

Every tenth pulse corresponding to a binary combination 0000 at the outputs of the third additional counter 35, goes to the thirteenth element And 28, at the output of which it is allocated as a logical unit to the fifteenth element And 30. The fifteenth element And 30 also receives the pulse generator signal 15 through the tenth element I 25, if a pulse corresponding to the extended optical mark 2, which marks a hundred meters of magnetic tape 3, is applied to the last one from the amplifier 5, as a result of which the shift register 37 is affected tvuet via the open fourth AND gate 19 on the fourth additional counter 36, the signals from which are supplied to the decoder 31.

In the rewind mode, the voltage from the third output of the switch 14 of operation modes opens the fifth 20, sixth 21, seventh 22 and eighth 23 AND elements, which allow counting the first 33, second 34, third 35 and fourth 36 additional counters, the normal operation of which is ensured by the first 16, third 17, third 18 and fourth 19 elements, respectively.

The pulses from the output of the amplifier 5 are also delivered through the switch 6 to the counter 7, acting on the comparison unit 8 together with the driver 9 of the reference signals. Comparison unit 8, together with converter 10 code - voltage, voltage regulator I1 and power supply unit 12, controls the rotation of electric motor 13, which provides movement of magnetic tape 3 in the process of measuring its square footage.

Claims (1)

The formula of the invention. neither A device for measuring magnetic tape footage containing an optical tag illuminator of a magnetic tape; a photosensitive element connected by an output to the amplifier input, the output of which is connected via a switch to the input of a counter connected by an output to the first input of a comparator unit that is connected by a second input to the output of a reference signal conditioner and connected to the input of a code-voltage converter connected by an output to the first input of the voltage regulator, which is connected by the second input to the first output of the power supply unit and is connected by an output to an electric motor connected to the second output of the power supply unit, chennogo vho- third output to switch operation modes, and a pulse generator, characterized in that, in order to increase the measurement accuracy of the magnetic tape footage, it introduced first, second, third and fourth AND gates, the first inputs connected to 0 5 o n c five 0 the first output of the mode switch, the second output of which is connected to the second input of the reference signal generator, connected to the output of the optical label marker illuminator, the fifth, sixth, seventh and eighth And elements connected by the first inputs to the third output of the mode switch, the fifth and the tenth And elements connected by the first inputs to the output of the amplifier, an additional illuminator of the optical labels of the magnetic tape, connected by the input to the fourth output of the operation mode switch The eleventh, twelfth, thirteenth, fourteenth and fifteenth elements connected in series with the indicator And the first, second, third and fourth additional counters and shift register, the first output of the mode selector switch being connected to the first inputs of the first, second, third and the fourth additional counters connected to the outputs of the fifth, sixth, seventh and eighth elements, respectively; And, the third output of the operation mode switch is connected to the second inputs of the first, second, third and the fourth additional counters connected to the outputs of the first, second, third and fourth elements And, the fourth output of the mode switch are connected to the second input of the ninth element And connected to the output of the third inputs of the first, second, third and fourth additional counters, the outputs of the first and second additional counters. connected to the inputs of the eleventh and twelfth elements AND respectively and connected to the inputs of the decoder, the other inputs of which are connected to the outputs of the third additional counter connected to the inputs of the thirteenth and fourteenth elements And, and to the outputs of the fourth additional counter, the output of the amplifier is connected to the second inputs of the first and n In addition, the elements And, the output of the eleventh element And is connected to the second inputs of the second and sixth elements And, the output of the twelfth element And is connected to the second inputs of the third and dmogo elements and pulse generator output is connected to the second vho713761163 the house of the tenth element, And, is connected — with the first input of the shift register, at the bottom of the input to the first input of the pnad — connected by the second input to the output, the central element And, which is connected to the fourteenth element And is connected to the second input to the output of the third output with the second inputs of the fourth element And and connected to the output of the first and eighth elements I.