SU1203588A1 - Device for changing parameters of recording tracks of magnetic sound tracks - Google Patents

Description

The invention relates to the field of information storage, namely, devices for measuring parameters of magnetic track recording tracks.

The aim of the invention is to improve the measurement accuracy of the parameters of magnetic recording tracks.

The drawing shows one of the possible variants of the proposed device for measuring the size of magnetic recording tracks of phonograms.

The device contains a write current driver 1, connected by output to stationary heads 2, an angular position sensor 3 rigidly connected to the shaft of an electric motor 4 on which heads 5 are mounted, mounted with the possibility of interaction with a magnetic tape 6 located on coils 7, driver 8 of the angular position signal, the playback amplifier 9, the shaper, control signal generator 10, the oscillographic indicator 11 and the permanent magnet 2. The angular position signal shaper 8 is connected by input to Exit sensor 3 angular position. The rotating heads 5 are connected to the input of the playback amplifier 9 connected by the output to the first information input of the oscillographic indicator 11. The output of the rotation control gain generator 0 is connected to the electric motor 4. In this case the fixed heads 2 and the permanent magnet 12 are mounted with the possibility of recording along the magnetic tape 6

The device also contains the first trigger frequency divider 13, the output of which is connected to the input of the rotation control signal generator 10, the waiting multivibrator 4 with adjustable pulse duration, connected by the input to the output of the angular position generator 8, the additional oscillographic indicator 15 connected the first information input with the output of the playback amplifier 9, the second trigger splitter frequency 16, the switch 17 with manual control, counter-indicator 18, the first and second analog sum tori 19 and 20, first and second counters 21 and 22 with a programmable counting module, selector 23 time reference marks and a crystal oscillator 24. The output of the switch 17 is connected to the clock input of the oscilloscope indicator 11. The output of the first analog adder 19 is connected to the second information input oscillographic indicator 11. Quartz oscillator 24 is connected to the input of the first trigger splitter 13 frequency and to the first input of the second trigger splitter 16 frequency, connected by a second input to the waiting multivibrator 14. F uschy multivibrator 14 is connected to the first input of the counter indicator 18 and to the first inputs of the first and second counters 21 and 22 with prog

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counting module connected by the second inputs to the output of the second trigger splitter 16 frequency connected to the first input of the selector 23 of the reference time stamps. The second input of the selector 23 of the reference time stamps is connected to the first output of the first counter 21 with a programmable counting module connected to the first input of the second analog adder 20, the output of which is connected to the first input of the first analog adder 19 and to the second information input of the additional oscillographic indicator 15. Synchronization input Additional oscillographic indicator 15 is connected to the output of the mimic 8 signal of the angular position. The second input of the second analog adder 20 is connected to the first output of the second counter 22 with a programmable counting module connected by a second output to the first input of the switch 17. The second input of the switch 17 is connected to the second output of the first counter 21 with a programmable counting module connected to the third input of the selector 23 reference time stamps, the output of which is connected to the second inputs of the counter-indicator 18 and the first analog adder 19.

The device works as follows.

In the recording mode, the write current shaper 1 acts on the stationary heads 2, which ensure the application of the recording tracks along the magnetic tape 6, shifted when winding from one coil 7 to another. In this case, the permanent magnet 12 provides for magnetization of the base edge of the magnetic tape 6.

In the playback mode, the signal of the crystal oscillator 24 is fed to the first trigger divider frequency 13, which generates synchronization signals having a line frequency, a frame rate and a double line frequency. The synchronization signals from the output of the first trigger splitter 13 frequency are fed to the driver 10 of the rotational control signal acting on the electric motor 4. The signal of the crystal oscillator 24 is also fed to the second triggers frequency divider 16, which is affected by the waiting multivibrator 14, which ensures a smooth zero reference the pulses of the generator 8 of the signal of the angular position, excited by the sensor 3 of the angular position. The second trigger divider frequency 16 forms the reference time stamps passing through the selector 23 of the reference time stamps to the meter 18 and to the first analog adder 19 and to the first and second counters 21 and 22 with a programmable counting module that are affected by the pending multivibrator 14 The first counter 21 with a programmable meter selects a zero count pulse, and the second counter 22 with a programmed memory.

the counting module — the pulses of a choice of the record track to be checked.

The first and second counters 21 and 22 with a programmable counting module through the switch 17 provide synchronization of the oscillographic indicator 11 and affect the selector 23 reference time stamps and the second analog adder 20. From the output of the selector 23 reference time stamps on the indicator indicator 18 and. The first analog adder 19 receives the reference time stamps located between the zero reference pulse and the selection pulse of the record track to be checked. From the output of the second analog adder 20 to the additional oscillographic indicator 15 and the first analogue

Secondary adder 19 receives amplitude zero count pulses and selection pulses of the test recording track. From the output of the first analog adder 19, the oscillographic indicator 11 receives the reference time stamps, zero count pulses and pulses of the selected test track. On the oscillographic indicator 11 and on the additional oscillographic indicator 15 are received

Also, the signals of rotating heads 5, formed when they cross recording tracks on magnetic tape 6. At the same time, the synchronization of the additional oscillographic indicator 15 is provided by pulses of the former 8 of the angular position signal.

Claims (1)

A DEVICE FOR MEASURING MAGNETIC PHONOGRAM RECORDING WAYS PARAMETERS, comprising a recording current driver connected to the output to the fixed heads, an angular position sensor rigidly connected to the motor shaft, on which are mounted rotating heads mounted to interact with the magnetic tape and connected to the input of the playback amplifier connected by the output to the first information input of the oscilloscope indicator, the driver of the rotation control signal, connected by the output to an electric motor, an angular position signal shaper connected to the output of the angular position sensor input, and a permanent magnet, the fixed heads and the permanent magnet being mounted for recording along the magnetic tape, characterized in that, in order to increase the measurement accuracy, the first trigger divider is introduced into it frequency, connected by the output to the input of the driver of the rotation control signal, waiting multivibrator, connected by the input to the output of the driver of the angular position signal, switch connected by the output to the synchronizing input of the oscilloscope indicator, the first analog adder connected by the output to the second information input of the oscilloscope indicator, an additional oscilloscope indicator connected by the first information input to the output of the playback amplifier, the second trigger frequency divider, the second analog adder, counter-indicator, the first and the second counters with a programmable counting module, a separator of reference time stamps and a crystal oscillator, and the crystal oscillator The driver is connected to the input of the first trigger frequency divider and to the first input of the second trigger frequency divider connected by the second input to the standby multivibrator connected to the first input of the counter-indicator and to the first inputs of the first and second counters with a programmable counting module connected by the second inputs to the output of the second trigger divider, frequency - SS frequency, connected to the first input of the separator of reference time stamps, connected by the second input to the first output of the first counter with programmable mode the account terminal connected to the first input of the second analog adder, the output of which is connected to the first input of the first analog adder and to the second information input of an additional oscilloscope indicator connected to the output of the angular position signal shaper, and the second input of the second analog adder is connected to the first output of the second a programmable counter module connected by a second output to the first input of the switch, the second input of which is connected to the second mu output of the first counter with a programmable counting module connected to the third input of the separator of reference time stamps, the output of which is connected to the second inputs of the indicator counter and the first analog adder. SU „„ 1203588