SU1642447A2 - Device for controlling oscillations - Google Patents

Abstract

The invention relates to a test technique, is intended to test products for impulse loads, and is an improvement of the device according to the USSR automatic communication system No. 1534433. the amplitude of the pulses in a pair of packs and with a linearly discretely variable amplitude in a sequence of packs of the same polarity. For this, a pulse counter 41, a switch 42, a delay element 43, a switch 44, an inverter 45 and a mode setpoint 46 are entered into the device for controlling the oscillations. 2 Il.

Description

The invention relates to testing equipment and is intended for testing products for pulsed loads.

The purpose of the invention is the expansion of functionality by providing the reproduction of pulse sequences of signals with bipolar pairs of pulses of pulses of alternating polarity at a constant amplitude of pulses in a pair of packets and with a linearly discrete amplitude in a sequence of packets of the same polarity.

On the. figure 1 shows the structural diagram of the proposed device; figure 2 - diagrams explaining his work.

The device for controlling oscillations contains a series-connected generator of periodic signals 1, an amplitude controller 2 and a first key 3, as well as a series-connected power amplifier 4, a vibrator 5, a vibration transducer 6, a matching amplifier 7, a peak value meter 8, a memory unit 9, and a first block 10 comparison, as well as the shaper 11 of the rectangular pulses. inverter 12, first pulse counter 13, first differentiating unit 14, first element And 15, first and second triggers 16 and 17, second differentiating unit 18. pulse number adjuster 19, third differentiating unit 20, first switch, 21, second switch 22, second key 23, third trigger 24, reverse counter 25, first maximum code adjuster 26, second comparison unit 27, digital-to-analog converter 28, AND element 29, first delay element 30, third and fourth keys 31 and 32, respectively, fourth trigger 33, second counter 34 pulses, WTO oh maximum code switch 35, third comparison unit 36, OR elements 37 and 38. second delay element 39, start input 40, fourth pulse counter 41, third switch 42, third delay element 43, fifth key 44, second inverter 45 and switch 46 Mode.

A device for regulating vibrations is as follows.

When a signal is received at input 40 Start, trigger 33 is set to a single state. In this case, the key 31 is closed. The generator 1 generates at its output a periodic signal, in particular sinusoidal oscillations, which through the regulator 2 are fed to the input of the key 3.

In the initial state, the trigger 17 is set to zero, the key 3 is open and the pulse signals do not arrive at the vibrator 5. At the output of the former 11, rectangular pulses are formed, which are differentiated by block 14. The pulses simultaneously inverted by block 12 are differentiated by block 18 and fed to the input setting the zero state of the trigger 17, confirming its zero state. The pulses from the output of the shaper 11 are fed to the input of the counter 13, which forms a pause between the pulse signals generated by the vibrator 5.

When a pulse appears at the output of the counter 18, the trigger 16 is set to a single state. Therefore, when a pulse of positive polarity appears at the output of block 14, an pulse appears at the output of element And 15, which sets the trigger 17 to a single state. In this case, the block 9 is prepared for operation, the key 3 is closed and passes the pulses from the generator 1 to the amplifier 4 and then to the vibrator 5.

The output signal of the vibration transducer 6 through the matching amplifier 7 and the meter 8 is fed to the input of block 9, which stores the maximum value of the signal. This value of the signal at the time of a pause is compared with the one set in block 10 and their difference is fed to the control input of controller 2. adjusting the pulse amplitude to the specified value.

In the program change mode, the pulse amplitude increases linearly discretely to the maximum value and then linearly · discretely decreases from the maximum value to the output of the switch 21, the signal from the output of the digital-to-analog converter 28, and the signal from the output of the block 36 to the first output of the switch 42.

During the formation of pulses arriving at the vibrator 5, the trigger 16 is set to a single state, the key 23 is closed, and the pulse corresponding in time to the leading edge of the working pulse of the vibrator 5 is transmitted through the closed key 31 to the input of the switch 22 and then to the summing input of the counter 25. increasing its contents by a unit of lower order. The same pulse delayed by element 30. is fed to the input of block 27, and from the output of key 31, to the input of setting the zero state of trigger 33.

In this case, the key 31 is opened, and the key 32 is closed. From the output of the key 32, the pulse through the OR element 38 is supplied to the counting input of the counter 34, increasing its content by a unit of the least significant bit. The pulse delayed by element 39 is transmitted to the input of block 36. If the codes of counter 34 and setpoint 35 are equal, this pulse is then fed to the input for setting the counter 34 to zero, and through switch 42 and OR 37, to the input for setting the trigger single state 33. 'key 31 closes again, and key 32 opens.

In case of inequality of codes at the inputs of block 36, trigger 33 remains in the zero state, therefore, key 31 is open and key 32 is closed. Subsequent pulses are received through the key 32 and the OR element 38 to the input of the counter 34 and through the element 39 to the input of the block 36 until the contents of the counter 34 are equal to the contents of the setpoint 35. In this case, the key 31 closes again and the output pulse the key 23 is fed to the input of the switch 22 and to the element 30.

Thus, the counter 34 counts the number of pulses of a burst with a constant amplitude. The number of pulses of the packet is determined by the contents of the setter 35.

If the contents of the counter 25 and the setter 26 are equal, the pulse from the output of the element 30 goes to the input of setting the zero state of the trigger 24. In this case, the signal from the output of the switch 22 goes to its output connected to the subtracting input of the counter 25. If the state of the counter 25 is zero And 29, a signal appears that sets the trigger 24 in a single state, and the switch 22 in a state in which the pulse signal from its input goes to its output connected to the summing input of the counter 25.

At the time of the end of the working pulse at the input of the installation of the zero state of the trigger 17 from the output of the block 18 receives a pulse and sets the trigger 17 to zero. When this key 3 is opened and the trigger 16 is set to zero by the pulse from the output of block 20.

The setter 19 is made in the form of a counter that counts the number of pulses and, upon reaching the set value, stops the counter 13.

In the mode of generating bipolar bursts of pulsed signals with a constant amplitude of signals in two adjacent consecutive bursts of bipolar signals and a linearly discrete amplitude in a sequence of pairs of packets of alternating polarity, a single signal from the output of mode switch 46 is supplied to the control input 42, and the signal from the input of the switch goes to its second output, and therefore to the counting input of the counter 41, set to its original state. The counter 41 is made two-digit. In the initial state, the fifth key 44 is closed. The first pulse from the output of block 36 increases the contents of the counter 41 by a unit of low order, so the key 44 opens and the pulses of the second packet turn out to be of negative polarity, since they are fed to the input of the power amplifier 4 through inverter 45. Only after the formation of two packets of pulses does one appear on the second input of the OR element 37, the trigger 33 is set to a single state, so that the key 31 is closed, and the next pulse from the output of the I15 element goes to the input of the counter 25, changing its contents by one ml of the previous discharge, the magnitude of the signal at the input of the comparison unit 10, and hence the pulse amplitude of the next burst. Each pulse signal generated at the output of the OR element 37 is supplied through the delay element 43 to the reset input of the counter 41, setting it to zero.

Thus, the invention allows to expand the functionality of the device by enabling the formation of sequences of bipolar pairs of bursts of pulsed signals of alternating polarity with a constant amplitude of the signals in a pair of bursts and with a linearly discrete amplitude in the sequence of bursts of pulsed signals of positive and negative polarities.

Claims (1)

Claim Device for regulating oscillations according to ed. St. No. 1534433. characterized in that, in order to expand the functionality by providing reproduction of pulse sequences of signals with bipolar pairs of pulses of pulses of alternating polarity with a constant pulse amplitude. in a pair of packets and with a linearly discrete amplitude in a sequence of packets of the same polarity, a third switch, a third delay element, are introduced into it. a fourth pulse counter, a mode switch, a second inverter and a fifth switch, the output of the first switch being connected to the input of the power amplifier through a second inverter and a fifth switch connected in parallel, the control input of which is connected to the inverse output of the high order of the fourth pulse counter connected to the first input with the first the output of the third switch, the reset input through the third delay element with the output of the first IL element AND and the low-order output - with the second input of the first OR element connected to the third input the house to the second output of the third switch, in which the signal input is connected to the output of the third comparison unit, and the control input is connected to the output of the mode switch.