SU378861A1 - —BOSOO1OZN.a, I - Google Patents

Description

one

The invention relates to the field of determining the statistical characteristics of random flows using computer technology.

The known devices, based on the statistical test method, contain logic circuits for extracting the number of random flow pulses on an exemplary time interval, an adjustable generator of exemplary pulses with a reading device, and a reversible counter for determining the difference in the numbers of favorable outcomes in statistical tests. However, obtaining accurate results is associated with a long Measurement Time and the presence of two readout devices.

The purpose of the invention is to improve the measurement accuracy while reducing the analysis time.

For this, in the proposed device, the measurement process is automated, the device is a self-tuning system with a feedback circuit, made by connecting a voltage to frequency converter to the integrator and its connection via a trigger with one of the inputs of the logic device.

The block diagram of the device shown in the drawing.

It contains the logic / allocation of the number of impulses of random

flow into the reference time interval; pulse formers 2 and 3, integrator 4, readout unit 5, voltage converter - frequency 6 and trigger 7.

The device input is connected to the input a of the logic circuit 1, two of which are all adjacent outputs through pulse formers 2 and 3 are connected respectively to the summing and subtracting inputs of the integrator.

Its output is connected to the reading unit 5,

as well as through voltage converter -

frequency 6 and trigger 7 with input b logical

scheme.

The device works as follows.

The random flow under study is fed to the input of logic circuit 7, and the sample flow generated by trigger 7 is input to input b. With the arrival of each exemplary pulse, the logic circuit allows determining the number of hits of a random flow per interval in the exemplary flow. With continuous arrival of pulses of the reference flow, random pulse flows with intensities (densities) are formed at the outputs of the logic circuit.

-y / oya, -. „.,,

where i is the output number of the logic circuit P 1.2, ...;

Ph,

the probability that t pulses of the simplest random flow fall on the TO interval.

The pulses from any two adjacent outputs of the logic circuit are normalized by formers 2 and 3 in duration and amplitude, therefore the output voltage of integrator 4 is determined solely by the difference of intensities of random flows and, therefore, by the difference of probabilities P, ni, toX and Pt, 1 x If at the moment the intensity difference mentioned is different from zero, the output voltage of the integrator 4 will change, as a result, the duration of the sample pulses will change until the intensity of the random flows from the output the logic doesn’t compare. The equality of km and Xm-i implies that

 t-i, s, hd. , - „, X

OR finally

-, to

where V is the integrator output voltage; Transmitter voltage-frequency transfer ratio. When using the described device in the complex of the information-measuring system, it is convenient to take the output pulse frequency from the voltage-frequency converter 6 output as the output value.

Subject invention

A device for determining the density of the simplest random flow, containing, its logic circuit connected via pulse shapers to an integrator connected to a reading unit, characterized by

in order to increase accuracy, it contains a voltage-to-frequency converter connected via a trigger to one of the inputs of the logic circuit.