SU384127A1 - DEVICE FOR UNDERWATER MANAGEMENT - Google Patents

Description

one

The invention relates to the field of automation and computational techniques, and is intended for use in memory with magnetic drums or discs.

There are known devices for controlling the supply of magnetic heads, which contain a unit for measuring time intervals and a unit for generating commands.

The purpose of the invention is to improve the accuracy and reliability of work under conditions of varying voltage stresses.

In the proposed device, a command generation unit contains a trigger, the single and the zero inputs of which are connected respectively to the maximum and minimum outputs of the time interval measurement block directly and through the OR circuit, the second input of which is connected to the initial setting bus, and the trigger output is connected to the command output bus variable lag circuit. The command generation unit contains a generator connected to the third input of the “OR.

The drawing shows the functional diagram of the device.

The device has a block / time interval measurement, a command generation block 2, containing trigger 1, the single and zero inputs of which are connected to the block outputs / directly and through the scheme OR 4,

the second input of which is connected to the bus 5 of the initial installation, the variable delay circuit 6, the command bus 7, the generator 8.

The device works as follows. If the speed of rotation of the million disk is critical to a critical one, the impulse from the output of the block / post through the scheme “ILR 4” to the zero input (reset) of trigger 3 and resets it.

The output signal of the trigger prohibits the supply of magnetic heads to the carrier underpowered. In this case, the signal from the output of the block at the single input of the trigger, which corresponds to the rotational speed of the carrier more critical, is blocked. When such a speed is achieved, the signal from the output of the block enters the single input of the trigger 3 and cocks it, thereby allowing the supply of heads to the carrier.

The pulses of the generator 8, having passed through the circuit 4, periodically (once for the “K revolutions of the carrier) reset the trigger 3 and thus perform the initial installation and reset when other circuits of the reset are out of operation. The pulses from the trigger output 3 are fed to the input

circuits 6. This circuit generates a resolution signal for supplying magnet heads at a speed / speed after the continuous resolution signal arrives at its input. If the enabling sigal at its entrance disappears and turns on again,

Then the output enable signal is a longer period of time. This circuit generates a signal to prohibit the supply of magnetic heads, which will turn down after a continuous inhibit signal, and the output signal.

If, however, the blocking signal at its input disappears and appears again, then circuit 6 outputs a inhibitory signal after a longer period of time. Through the use of circuit 6, errors in the operation of the device due to one-time faults are eliminated.

Subject invention

Claims (2)

1. An apparatus for controlling a sub-code of magnetic heads comprising a time interval measuring unit and a generating unit commands, characterized in that, in order to improve the accuracy of the device, the command generation unit contains a trigger, the single and zero inputs of which are connected respectively to the maximum and minimum outputs of the time interval measuring unit directly and through the OR circuit, the second input of which is connected to the initial installation, and the trigger output is connected to the command issuing bus via the / variable delay circuit. 2. The device according to claim 1, characterized in that, in order to increase the reliability of operation, the command generation unit comprises a generator connected to the third input of the OR circuit.