SU641353A1 - Pulse amplitude measuring arrangement - Google Patents

Description

one

The invention relates to a measurement technique, can be used for the analysis of transients in monitoring and control devices.

A device for measuring the amplitude of a periodic signal containing logic elements, transducers, a generator {J.

However, the measurement of the amplitude of a non-periodic pulse sequence using this device makes measurement errors very large.

It is also known a device for measuring the amplitude of a non-periodic signal containing a clock generator, an organ and a digital-to-analog converter | 2}

When measuring the amplitude of a non-periodic pulse train, the measurement error is so large that the device actually stops operating.

The purpose of the invention is to increase the accuracy of measuring the amplitude of a non-periodic sequence of pulses.

The goal is achieved by the fact that in a device for measuring the amplitude, containing a clock generator, a null organ

and a digital-to-analog converter, the input module of the voltage module, comparator, resolution block, trigger counter, switch and series-connected counter of the number of deviations, decipher and second trigger counter, input of which is also connected to the second input of the switch, are entered in series; the second input is connected to the input a trigger counter, and the output is connected to the third input of the switch, the output of which is connected to the input of a digital-to-analog converter, the output of the input unit of the voltage module through a null organ, is connected to the input of the counter of the number of deviations, the second output of the descrambler is connected to the second input of the comparator via a digital-analog converter, and the output of the clock generator is connected to the second input of the resolution unit.

Functional diagram of the device shown in the drawing.

Claims (3)

The device contains a module introduction unit 1, a comparator 2, a null organ 3, a clock generator 4, a resolution block 5, a counter for the number of deviations 6, a decoder 7, trigger counters 8 and 9, switch 0 and an analog converter 1. The device works as follows. In the initial state Ц (the signal voltage to be measured) is zero, Uon (reference voltage) is zero, therefore, the comparator 2 is in a state where resolution block 5 is locked, i.e. the clock signal 4 does not pass to trigger counters 8 and 9. The output voltage of the digital-to-analog converter (DAC) II is also zero. Transient oscillations from the control object through the module I input unit arrive at the signal input of the comparator 2 and the null organ 3. The null organ and the deviation number counter 6 determine the number of oscillations, and the decoder 7 issues commands to establish the trigger counter in the “O” state. controls the switch 0 and the D / A converter P. At the moment of the beginning of the first oscillation, when Uon O, the comparator 2 changes the state and allows the clock signal 4 to pass to the trigger meters 8 and 9. The current value counter begins to count, to its signal l through the switch 0 enters the DAC 11, and from here in analog form enters the reference input of the comparator 2. As soon as Uot, becomes equal to or greater than the Z.Component, it returns to its original state, closes the resolution block 5, and the trigger counter stops counting. At the moment of transition, the oscillation value through the "O decoder 7 sets to the state" O the trigger counter of the current value 9, and the voltage at the output of the D / A converter J1 becomes equal to zero. On the counter 8, the signal remains in digital form equal to U: ngj4. When the second oscillation arrives, the cycle repeats. In this case, the total value of the values of the first and second oscillations, and so on, is recorded in counter 8. The decoder 7 is set to the position, corresponding to its number of oscillations that need to be measured, before starting the measurement. After completing the measurements, the decoder 7 switches the switch 10, and a voltage equal to the sum of the voltages of the measured oscillations appears at the input of the DAC 11. The magnitude of this voltage can be judged on the quality of the transition process of the control object. An apparatus for measuring pulse amplitude, comprising a clock generator, a zero-organ and a digital-analog converter, characterized in that, in order to improve the accuracy of measuring the amplitude of a non-periodic pulse train, a sequentially connected input unit of a voltage module, a comparator, a resolution block, a trigger counter, a switch and a series-connected counter of the number of relations, a decoder and a second trigger counter. The input is also connected to the second input of the switch, the second input is connected to the input of the trigger counter, and the output is connected to the third input of the switch, the output of which is connected to the input of the digital-to-analog converter, and the input of the voltage module is connected to the input of the counter the number of deviations, the second input of the decoder is connected to the second input of the comparator via a digital-to-analog converter, and the output of the clock generator is connected to the second input of the resolution block. Sources of information taken into account during the examination: 1. USSR Author's Certificate No. 448682, H 03 K 5/00, 1975. 3. “Instruments and equipment of experiment No. 14, to become“ A digital meter of amplitudes of nanosecond pulses, 1971.