SU1277185A1 - Device for magnetic recording - Google Patents

Abstract

The invention relates to instrumentation engineering and allows increasing the speed and reliability of the device. When accumulating the data necessary for recording a zone on a magnetic tape, a high level signal is received from the system at input 7, which through the elements AND 19, OR 21, and 27 sets the trigger 24 and through the element 26 it enters the delay circuit 25. The tape moves in the forward direction, and then the signal from the output of the delay circuit 25 through the element OR 29 starts the generator 30, which records the data from the inputs 33. 1 Il. (L to m 00 ate

Description

The invention relates to instrumentation and can be used in systems for collecting, recording and processing information. The purpose of the invention is to enhance the performance and reliability of the device. The drawing shows a block diagram of a magnetic recording device. The device connects the magnetic recording device 1, the control unit 2 controls the first 3 and the second 4 elements AND, the first inverter 5, the first 6 and the second 7 inputs of the device, the first 8, the second 9, the third 10 counters, the first 11, the second 12, the third 13 and the fourth 1t triggers, the third 15, the fourth 16, the fifth 17, the sixth 18, the seventh 19, the eighth 20 elements And, the element №1И 21 delay circuit 22, the second inverter 23. The control unit 2 may contain a trigger 24, delay circuit 25, elements Both 26 and 27, elements I.TII 28 and 29, controlled generator 30. The device also has the third 31 and fourth 32 inputs. The information inputs of the device are the inputs 33 of a magnetic recording apparatus. In the initial state, all the trigger and counters are reset (the setup circuits in the initial state are not shown in the drawing). The device works as follows. In the initial state, the element And 19 is closed, and the high level from the inverse output of the trigger 13 through the element OR 21 opens the element And 27 of the control unit 2. In the presence of a readiness signal from the magnetic recording apparatus, the beginning of the movement, coming through the first input of block 2 to element 27, generates a signal at its output, sets the trigger and 24, and through element 26 that triggers the delay circuit 25. The signal at the output of the trigger 24 starts the movement of the tape in the magnetic recording apparatus, and then, with a signal from the output of the circuit 25, the generator 30 starts up with a signal for accelerating the tape to the nominal speed. This signal goes through the open element 20 to the delay circuit 22, the output of which makes the generator 30 stop, and the counter 10 assumes a single state. The delay in circuit 22 is effected by the time required to generate 1852 by the signal generator 30, which records the mark on the magnetic tape. In this case, the signal from the output of the circuit 22 causes a reset of the motion trigger 24. At the time of movement of the magnetic tape, the signal at the first output of the magnetic recorder is low. After the magnetic tape stops at the first output of the magnetic recorder, a high level of the readiness to start movement appears, after which the trigger 24 is set again and the magnetic tape begins to move. A signal from the output of the circuit 25 starts the generator 30 to record the second mark, after which the signal from the output of the circuit 22 stops the generator 30, resets the trigger 24 and increases the state of the counter 10. At the same time, the signal from the output of the counter 10 blocks AND 20 and sets the trigger 14. When the trigger 24 is reset, it stops A trigger 24 is set and the magnetic tape begins to move, but in the opposite direction, since trigger 14 is set. When the magnetic tape moves in the reverse direction in the magnetic recording apparatus, previously recorded marks are read from the tape. The first will be read the label recorded by the second, while the signal from the output of the magnetic recording apparatus to the post, goes to the element 15, opened by the set trigger 14. On the trailing edge of the signal at the output of the element 15, a trigger 11 is set, allowing clock pulses from input 31 Element 17 at the counting input of the counter 8. When reading the next label (recorded first) through elements 15 and 16, the flip-flops 13, 14, 24 are reset and then the falling edge of the signal at the output of the 15 element triggers the trigger 11. Element And 17 closes and in the account Chick 8 fixed number of clock pulses corresponding to the interval of time during continuous movement of the magnetic tape between marks recorded to stop the tape. After stopping the magnetic tape, the device is ready to record information from the outputs 33. The sign of the low-level counter 8

3

the output of trigger 12 is rewritten into counter 9.

 When accumulating in the system of collecting and recording the amount of data required to record a zone on a magnetic tape, the system receives a high level signal at input 7, which sets trigger 24 through elements AND 19, OR 21, And 27, and through element 26 enters circuit 25. A magnetic tape begins to move in the forward direction, and then the signal from the output of circuit 25 through the OR element 29 is started by the generator 30, which records the data from the inputs 33.

When a zone of the required volume is recorded from the system, a pulse arrives at the input 6, which is set through the OR element 28 by the generator 30 and if no data is prepared in the system to record the next zone, then the trigger 24 and the magnetic tape are reset via element 3.

When data is accumulated, a high level is applied to input 7 and the zone recording process is repeated. The signal at input 6 ends the recording of the zone and the generator 30 stops. If the data for recording the next zone is prepared at the moment when the termination signal arrives at input 6, the signal from the output of the And 4 element sets the trigger 12. The set trigger 12 prohibits writing to the counter 9 of the counter 8 and permits the passage of clock pulses through an AND 18 element to the subtracting input of counter 9. An interband gap is formed without stopping the magnetic tape. When the value of counter 9 becomes zero, the signal from its output resets trigger 12 and

Allows the generator 30 to record the next zone.

Claims (1)

Invention Formula A magnetic recording device containing a magnetic recording apparatus, the first and second inputs of which are connected to the same outputs of the control unit, the first input of which is connected to the first output of the magnetic recording apparatus, the second input of the control unit connected to the output of the first And element, the first input of which is connected to the first input of the second element 1854 And the first input of the device is the second input of the first element And connected to the output of the first inverter, the input of which is connected to the second input of the second element And is the second input of the device, characterized in that, in order to improve speed and reliability, the first input , second and third counters, first, second, third and fourth triggers, third, fourth, fifth, sixth, seventh and eighth elements AND, element OR, a delay circuit and a second inverter whose input is connected to the output of the third counter and the first input even The first trigger, the first output of which is connected to the first input of the third element And and the third input of the magnetic recording apparatus, the second output of which is connected to the second input of the third element And whose output is connected to the first input of the fourth element And and the input of the first trigger, the output of the last with the second input of the fourth element And and the first input of the fifth element And, the output of which is connected to the input of the first counter, the outputs of the named counter are connected to the corresponding inputs of the second counter, the first control whose input is connected to the output of the sixth element And, and the second to the output of the second trigger and the first input of the sixth element And, the second input of this element is connected to the second input of the fifth element And, and is the third input of the device, the output of the second counter is connected to the first input of the second the trigger and the third input of the control unit, the second input of the second trigger is connected to the output of the second element I, the first input of which is connected to the fourth input of the control unit, the fifth input of this block is connected to the input of the third counter and the output ohm of the delay circuit, the input of which is connected to the output of: the eighth element I, the first input of this element is connected to the output of the second inverter, and the second input to the third output of the control unit, the input of which is connected to the second output of the fourth trigger, the second input of this trigger is connected to the output of the fourth element And, the seventh input of the control unit and the first exit of the third trigger, the outputs of which are connected respectively to the first inputs of the seventh element And and the OR element, the output of the latter is connected by the eighth input of the unit Item 12771854, and the second input is with the output of the seventh element I, the second input of which is connected to the second input of the device.