SU718864A1 - Apparatus for magnetic recording - Google Patents

Description

The invention relates to techniques for magnetic recording, and in particular to devices for magnetic recording on a disk medium.

A device for magnetic recording is known, in which, to control the recording process, 5 recording — playback, a recording unit, a playback unit, and an indicator are connected to the switch [1].

The disadvantage of this device is the low reliability of control, due to the fact that these blocks and connections do not provide control of the surface of the magnetic carrier.

Of the known devices, the closest in technical essence and the achieved effect to the described invention is a device containing a switch, recording units and playback units connected to the same heads and a switch, a control signal generator, the output of which is connected via a key to the blocks records, and the input - with the command signal bus, and position sensors connected to the switch [2].

This device has the same drawback 25 as the first.

The purpose of the invention is to increase the reliability of control.

To this end, the proposed device is equipped with a control signal determination unit 30, the four control inputs of which are connected to the outputs of the switch, the fifth control input is connected to the outputs of the playback units, the signal input is connected to the command signal bus, and the output to the input of the switch.

The drawing shows a block diagram of a device.

The device comprises a switch 1, recording units 2 connected to the recording heads 3, playback units 4 connected to the reproducing heads 5, a control signal generator 6, the output of which is connected via the key 7 to the recording units 2, and position sensors 8. The sensors 8, the recording units 2 and the playback units 4 are connected to the switch 1. The input of the generator 6 is connected to the bus 9 of the command signals.

The device is also equipped with a control signalogram determination unit 10, the four control inputs of which are connected to the outputs of the switch, and the fifth control input - with the outputs of the playback units 4. The connection with the playback units 4 is through the comparison unit 11. The signal input of the unit 10 is connected to the bus 9, and the output is connected to the input of the switch 1.

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Block 10 contains valves 12, 13, whether # ju, -..., 14 delays, triggers 15 and 16, sksGmu'ILI '' 17 and inverter 18.

The device operates as follows.

Groups of magnetic heads 3 and 5 are cyclically moved above the surface of the magnetic disks 19 from edge to center (working stroke) and from center to edge (idle). When a command signal is sent to 1 bus 9, the generator 6 is turned on, the signals of which are transmitted via electronic key 7 to the recording blocks 2. At the same time, the signal from the bus 9 through the delay line 14 triggers 15 and 16 are set to their initial position, while the valve 13 is closed and a signal is generated at its output, allowing the passage of pulses from the sensors 8 to the switch 1, which turns on the recording unit 2. Through the block 2 2 records and the head 3 records on the magnetic track of the disk 19 is applied to the control signal.

When the control signal enters the area of the playback head 5, the valve j 13 opens to pass the reproduced signal, while the switch 1 switches the magnetic recording heads 3 and playback heads 5 and the zone numbers that are displayed by indicator 20 and played by the heads 5. In case of malfunction a record-playback channel or damage to the disk surface 19 in the area that reproduces the head 5, is removed from the fifth signal yn _g ravlyaetsya input unit 10, while with you

-. Turning 13 on the switch 1 sends a signal to prohibit switching heads, and the indicator 20 displays the number of the faulty recording-playback channel 5 or the number of the damaged zone of the disk 19.

The invention improves the reliability of control by reflecting the state of not only the recording and reproduction channels, but also reflecting the state of the surface of the magnetic disk.

Claims (2)

I "si.. Block 10 contains valves 12, 13, or # ju ,; 14 delays, triggers 15 and 16, with ShuILI 17 and inverter 18. The device operates as follows. The groups of magnetic heads 3 and 5 cyclically move over the surface of the magnetic disks 19 from the edge to the center (working stroke) and from the center to the edge (idling). When a command signal is applied to the bus 9, the generator 6 is turned on, the signals of which through the electronic key 7 are fed to the blocks 2 of the record. At the same time, the signal from bus 9 through delay line 14 triggers 15 and 16 are reset, and valve 13 closes and a signal is generated at its output, allowing pulses from sensors 8 to pass to switch 1, which activates block 2 of recording. Through the recording unit 2 and the recording head 3, a control signal is applied to the magnetic track of the disk 19. When the control waveform enters the area of the playback head 5, the valve 13 opens for the reproduction of the reproduced signal, and the switch 1 switches the magnetic recording heads 3 and the playback heads 5 and the zone numbers, which are displayed by the indicator 20 and reproduced by the heads 5. - reproducing or damaging the surface of the disk 19 in the zone reproduced by the head 5, the signal from the fifth control input of the unit 10 is removed, while with you .-, - 5 10 15 20 25 30 35: i: 4 valve / 1 strokes 13 on the switch 1 is given a head-out prohibition signal, and the indicator 20 displays the number of the faulty recording-playback channel or the number of the damaged area of the disk 19. The invention improves the reliability of control by reflecting not only the recording-playback channels, but also the reflection of the surface conditions magnetic disk. The device for magnetic recording, containing a switch, recording blocks and playback blocks connected to the same heads and a switch, a pilot signal generator, the output of which is connected via a key to the recording blocks, and the input is connected to a command signal bus, and position sensors connected to a switch, characterized in that, in order to increase the reliability of the control, it is provided with a control signal detection unit, four control inputs of which are connected to the switch outputs, fifth control input coupled to the outputs of the reproducing unit, a signal input is connected to the bus command signals, and an output connected to the input of the switch. Sources of information taken into account during the examination 1. USSR author's certificate No. 486355, cl. G 11B 5/00, 1975. 2. USSR author's certificate number 574770, cl. G 11B 27/36, 1976 (prototype).