SU741276A1 - Digital statistical analyzer - Google Patents

Description

The invention relates to computing and can be used in devices for measuring parameters of random processes. five

A multifunctional statistical analyzer is known for measuring the probability distribution of various emission parameters of random processes. 1.10

The closest technical solution to this invention is a digital statistical analyzer containing counters, the inputs of which are connected to the corresponding outputs of the elements I, the first inputs of which are connected to the first output of the pulse generator, the second output of which is connected to the input of the installation of the zero accumulating counter, 20 outputs which are connected to the respective inputs of the decoder, the outputs of the decoder are connected to the second inputs of the corresponding elements And, the input of the pulse generator is connected 25, the output of the threshold element, the first and second inputs of which are connected to respective inputs of adder

both are first and second

analyzer, the output of the adder plug-in, Q

To the first input of the comparison element, the output of which is connected through the first and second discriminators to the first inputs of the first and second elements I, whose outputs are connected respectively to the inputs the addition and subtraction of a reversible counter, the output of which is connected to the input of a digital-analogue converter, the output of which is connected to the second to the input of the reference element, the second inputs of the first and second elements I are connected to the output of the pulse generator 2.

The disadvantages of the known analyzers are that they do not allow measuring the distribution of the emission areas.

The aim of the invention is to enhance the functionality of the device by estimating the distribution of emission areas.

The goal is achieved by the fact that a switch and a frequency divider are introduced into the proposed digital statistical analyzer, while the output of the pulse generator is connected to the input of the frequency divider, the outputs of which are connected to information

the inputs of the switch, the control inputs of the switch are connected to the outputs of the reversible counter, and the output of the switch is connected to the counting input of the accumulating counter.

FIG. 1 shows the block diagram of the proposed analyzer; in fig. 2 schedule; see how it works.

The analyzer contains adder 1, element 2, digital-analogue converter 3, first discriminator 4, second discriminator 5, first element 6, second element 7, reversible counter 8, switch 9, frequency divider 10, accumulating counter 11, pulse generator 12, the threshold element 13, the pulse shaper 14, the elements And 15, the decoder 16, channel counters 17.

The principle of operation of the digital analyzer is based on a uniform quantization of not the level of the amplitude of the emission. SB emission is defined as

Sg and U C, +. .. ttt. As with uniform quantization,. . . ,, where fikU is the quantization level, then the expression for SB can be written as. Sg AUt + 2uU-ut2. +. . . + & Uu-ty ,.

If the voltage is converted to a pulse frequency, i.e. we assume that U.U 1C (f, then the expression for SB takes the form

 {fu.t + 2f- u.t2 + ... + f & tyi) N is the number of pulses.

The analyzer works as follows.

The instantaneous value of the emission voltage from the output of the adder 1 is fed to the comparison unit 2, to the second input of which voltage is supplied from the output of the digital-to-analog converter 3. Depending on the sign of the difference of these voltages, the first discriminator 4 is triggered, opening the first element And b, or the second discriminator 5, the opening second element AND 7. The pulses of the generator 12 are passed either to the subtractive or to the summing input of the reversible counter 8 until the voltages supplied to the comparison element 2 are compared c. In this case, both elements AND b and i are closed. Thus, the output of the digital-to-analog converter 3 produces a step voltage that repeats the form of the outlier, and the code of the reversible counter 8 at each time moment corresponds to the amplitude of this voltage.

The switch 9 under the influence of the control signal of the reversible counter 8 connects one or another output of frequency divider 10 to the signal input of the accumulating counter 11. If the number of quantized emission levels is equal to P (P Determines the accuracy;

Sg), then the frequency divider 10 must have P outputs with different division factors. The pulse repetition rate of the generator 12 should be determined as the smallest 5 common multiple of 1,2,3 ... P. If at some moment of time the voltage amplitude at the output of converter 3 is, for example, if, then the corresponding state of this switch 8 is such that switch 9 connects the first output of frequency divider 10. At the same time, pulses with frequency f arrive at the input of the counter 11 during the time At. When the voltage at the output of the converter 3 changes to 2dU, the switch 9 connects the second output of the frequency divider 10, so that the generator 11 impulses with a frequency of 2f over time At.o etc. are fed to the input of the counter 11.

So the total. pulses received at the input of the counter 11 during the duration of the ejection will be proportional to the area of 5 sd Sg. At the output of the threshold unit 13, an impulse is formed, the duration of which is equal to the duration of the ejection. At the moment of termination of the ejection, the second output of the former 14 appears

Q a short pulse that passes through that channel element 15, which is opened by the corresponding output of the decoder 16. This pulse enters the corresponding channel counter 17. at the time of the next ejection, the pulse from the first output of the former 14 resets the accumulating counter 11 to its initial state . After the required analysis time has expired, channel counters 17 will accumulate the ordinates of estimating the density of the area distribution of SB emissions.

Thus, the introduction of a switch and a frequency divider allows

5 to expand the functionality of the proposed analyzer.

Claims (2)

1. Computing technology Minsk, Science and technology, 1965, p. 28. 2. The copyright certificate 5 application no. 2229357 / 18-24, cl. G 06 F 15/36, 1976 (prototype).