SU851486A1 - Device for monitoring detonation of magnetic recording apparatus - Google Patents

Description

(54) DEVICE - FOR THE CONTROL OF THE DETONATION OF THE MAGNETIC RECORDING DEVICE

This invention relates to instrumentation engineering, in particular, to devices for controlling magnetic recording apparatus. A device comprising a magnetic head, an amplifier, a driver, a trigger, an AND-NOT circuit, counters, a register, and a registering device 1 is known. However, this device does not automatically control the speed variation of the magnetic carrier from the specified tolerance limits. . Closest to the present invention, there is a device for controlling a detonation comprising a reference frequency generator, connected via a counter to a descrambler and through a first output of the descrambler to the first input of a trigger. The OR element is connected between the second output of the decoder and the second trigger input, as well as between the counter, the delay line, and the coincidence circuit, which is connected to the indicator {2. The drawback of the device is the lack of control of the "deviation sign relative to the specified tolerances, which increases the adjustment time of the equipment. The purpose of the invention is to reduce the time of control of magnetic recording equipment by increasing the amount of control by registering a "detonation deviation sign with predetermined tolerances. This goal is achieved in that a device for controlling the detonation of a magnetic recording apparatus, comprising a series-connected reference frequency generator, a counter, a decoder, a first trigger, a first AND logic and an indicator, as well as a delay line whose input is connected to the output of a magnetic recording apparatus , with the reset input of the counter and the second input of the first logical element And, the second trigger connected in series and the logical element And, the output of which is connected to the indicator, while the output line back The holders are associated with a single input of the first trigger and a zero input of the second trigger, the single input of which is connected to the second output of the decoder, and the input of the delay line is connected to the second inputs of logic elements I. The drawing shows the proposed device block diagram.

The device for controlling the detonation contains a generator 1 of the reference frequency, a counter 2, a decoder 3, a delay line 4, triggers 5 and 6, logic gates And 7 and 8, an indicator 9, and a monitored magnetic recording device 10.

The generator 1 is connected to the counting input of the counter 2, the outputs of which are connected to the inputs of the decoder 3, designed to determine the upper and lower limits of the control tolerance.

The triggers 5 and b and the logic elements And 7 and 8 connected to their outputs serve to form the time interval for the tolerances of the control. The inputs of the triggers 5 and 6 are connected to the outputs of the decoder 3 and to the output of the 4 delay line. The input of the delay line connected to the reset input of the counter 2 second inputs of logic elements And 7 and 8 and connected to the output of the device 10 magnetic recording. The outputs of the logic elements And 7 and 8 are connected to the inputs of the indicator 9.

The device works as follows.

A reference frequency signal is pre-recorded on a magnetic carrier. For this purpose, a device generator and counter can be used.

. During reproduction, each pulse of the signal from the magnetic carrier resets the counter 2 to the zero state, after which it starts counting the pulses again from the generator 1. This same signal through the delay line 4 sets the trigger 5 to the single state, and the trigger 6 to the zero state. At the moment when the number of pulses corresponds to the lower limit of the tolerance, the output 11 of the decoder 3 p. The signal that sets the trigger 5 to the zero state, and at the moment when the number of pulses corresponds to the upper tolerance limit, the output 12 of the decoder 3 has a signal that sets the second trigger 6 to one. In the case when the next impulse from the magnetic recording apparatus 10 comes before the signal from the output 11 of the decoder 3, the AND 7 logic element operates and the indicator 9 shows the detonation output for the lower one. tolerance limit When the next pulse from the 10. Magnetic recording device comes after the signal from output 12

decoder 3, the logic element And 8 is triggered and the indicator 9 shows the detonation output beyond the upper tolerance limit. If the next impulse from the device 10 comes between the signals from the outputs I and 12, then the logic elements I 7 and 8 do not let it through. In this case, having passed through the delay line 4, the signal flips triggers 5 and 6 and brings the circuit to the initial state. Line 4 of the delay allows you to eliminate the transfer of triggers 5 and 6 and the opening of the logic elements And 7 and 8 pulse, the arrival of magnetic recording from the device 10 between the signals of the lower and upper tolerances. The proposed device shows in which direction the detonation deviation occurred beyond the specified tolerances, which increases the amount of control and reduces the adjustment time.

Claims (2)

Invention Formula A device for controlling the detonation of a magnetic recorder, containing a series-connected reference frequency generator, a counter, a decoder, a first trigger, a first logic element and an indicator, as well as a delay line whose input is connected to the output of the magnetic recorder, and a reset input of the counter and the second input of the first logical element AND, characterized in that, in order to reduce the monitoring time, the device has a sequentially connected second trigger and a logical element AND whose output is connected to indicator, wherein the output of the delay line is coupled to the input unit 5 of the first flip-flop and the zero input of vtorot trigger unit whose input is connected to the second output of the decoder, and the input of the delay line is connected to the second inputs of logic elements I. 0Sources of information taken into account during the examination 1. USSR Copyright Certificate No. 555434, cl. G 11 B 27/10, 11.02.76. 2. USSR author's certificate 5 № 418898, cl. G & B 27/36, 03.01.72 (prototype).