SU1654792A2 - Device for adjusting oscillations - Google Patents

Abstract

The invention relates to a test technique, is intended for testing products for impulse loads, and is an improvement of the known device according to A. USSR No. 1068905. The purpose of the invention is to expand the functionality by forming pulse signals with a linearly discretely decreasing follow-up period. For this, the device OR 25, the switch 24 with the mode setter, the second key element 26, the third trigger 27, the delay element 28 and the maximum code unit 23 connected in series, the second pulse counter 21 and the second comparison unit 22 are entered into the device. The invention allows to expand the functionality of the device, which expands its scope. 1 il.

Description

The invention relates to testing equipment, is intended for testing products for pulsed loads and is an improvement of the device according to ed. St. No. 1068905.

The purpose of the invention is the expansion of functionality by providing the ability to generate pulsed signals with a linearly discrete descending period.

The drawing shows a structural diagram of a device.

The device comprises serially connected generator 1 of periodic signals, amplitude controller 2, first key element 3, power amplifier 4, vibrator 5, vibration transducer 6, matching amplifier 7, peak value meter 8, memory unit 9, first comparison unit 10, and also driver 11 of square-wave signals, inverter 12, first pulse counter 13, first differentiating unit 14, element 14, first 16 and second 17 triggers, second differentiating unit 18, pulse number adjuster 19, third differentiating unit 20, second pulse counter 21, second comparison unit 22, maximum code setting unit 23, switch 24, OR element 25, second key element 26, third trigger 27, delay element 28 and reset input 29.

• The device operates as follows.

In the initial state, the triggers 16, 17, 27 are set to zero, the contents of the counters 13, 21 are zero, and at zero potential at the control input of the switch 24, the operation of the device is similar to that of the known device.

In the mode of generating a sequence of pulsed signals with a linearly discrete decreasing pulse repetition period, a single potential is supplied to the input of the pulse counter 21 and the contents of the maximum code setting unit 23 are written to the counter 21, and a single potential is supplied to the control input of the switch 24.

The generator 1 of the periodic signals generates a signal at its output, in particular a sinusoidal voltage, which is supplied to the input of the key element 3 through the amplitude controller 2.

Since in the initial state, the trigger 17 is in the zero state, the circuit of the key element 3 is open, and the pulse signals do not enter the winding of the moving coil of the vibrator 5.

At the output of the shaper 11, rectangular pulses are formed, which are differentiated by block 14. At the same time, pulses inverted by block 12 are differentiated by block 18 and fed to the zero input of trigger 17, confirming its zero state.

The signal from the output of the shaper 11 is input to the input of the first counter 13 pulses directly, and through the first delay element 28 to the input of the second comparison unit, and when the codes are equal at the outputs of the bits of the counters 13 and 21, a signal is generated at the output of the comparison unit 22, which enters through the switch 24 to the single input of the trigger 16, setting it to a single state.

Therefore, when a positive pulse appears at the output of block 14, an impulse signal appears at the output of element And 15, setting the trigger 17 to a single state. In this case, the key 3 is closed, at the same time, the signal from the output of the trigger 17 is fed to the input of the memory unit 9 and prepares it for storing the signal received at its input, and the signal from the output of the generator 1 enters through the amplifier 4 into the winding of the moving coil of the vibrator 5.

The output signal of the vibration transducer 6 through the matching amplifier 7 and the meter 8 peak values is fed to the input of the memory unit 9, which captures the maximum signal value.

The signal from the output of the memory unit 9 is fed to the first input of the comparison unit 10, the second input of which is supplied with a reference voltage from the output of the reference voltage source (not shown).

The maximum signal value recorded in the memory unit 9 at the time of a pause is compared with the reference value in the comparison unit 10 and is supplied to the control input of the amplitude controller 2, adjusting the pulse amplitude to a predetermined value.

The signal from the output of the comparison unit 22 through the OR element 25 is fed to the input of the zero setting of the counter 13, setting it to zero, and directly to the input of the unit setting of the trigger 27, setting it to the single state, and the key element 26 to the closed state.

In this case, the next signal from the output of the shaper 11 of the rectangular signals is fed to the summing input of the counter 13, which is in the zero state, increasing its contents by a unit of the least significant bit, and through a closed key 26 it is fed to the subtracting input of the counter 21, decreasing its content by a unit of the least significant bit, and to the input of the zero installation of the trigger 27, setting it to the zero state and bringing the key element 26 to the open state.

When the working pulse is limited, a pulse is received at the input of the zero setting of trigger 17 from the output of the second differentiating 5 block 18, setting the trigger 17 to zero, the key element 3 is opened, trigger 16 is also set to zero state by the pulse from the output of the differentiating block 10 20.

The next pulse at the output of the comparison unit 22 is again formed when the codes at its inputs are equal, and each subsequent code differs from the previous one by a unit of 15 least significant, which means that each subsequent interval between pulses differs from the previous one by the period of the sinusoidal voltage generated at the output of the generator 1 of periodic signals. 20

The pulse number master 19 counts the number of pulses and, upon reaching a predetermined value, stops the pulse counter 13.

A broader functionality is due to the possibility of generating a sequence of pulsed signals to excite the vibrator with a period that varies linearly discrete decreasing dependence, which 30 expands the scope of the device.

Claims (1)

Formula, invention A device for controlling oscillations according to ed. St. No. 1068905, characterized in that, in order to expand the functionality by providing the formation of impulse signals with a linearly discrete decreasing repetition period, an OR element, a switch, a second key element, a third trigger, a delay element, and a serial code maximizer are introduced into it , the second pulse counter and the second comparison unit, connected by the second group of inputs to the corresponding outputs of the first pulse counter, and the synchronization input through the delay element to the outputs of the forms square pulse generator and the information input of the second key element connected by the control input to the output of the third trigger, and the output to the input of the initial setting of the second pulse counter and the zero input of the third trigger, the reset input of which is the reset input of the device, and the output of the number of pulses is connected to the reset input of the first pulse counter through the OR element, the output of the first pulse counter is connected to the unit input of the first trigger through the switch, sub provided by the control input to the output of the mode switch, the second inputs of the OR element and the switch and the unit input of the third trigger are connected to the output of the second comparison unit.