SU124697A1 - Random Process Analyzer - Google Patents

Description

The subject of the invention is a random process analyzer designed to determine the amount of asymmetry and the number of deformation cycles, as well as other values represented as an electrical signal proportional to it.

The analyzer contains amplitude integral discriminator, coincidence circuits, trigger circuits and scaling circuits with electro-. khanicheskie counters. A distinctive feature of the proposed analyzer is that the outputs of its amplitude discriminator are electrically connected to the input of a selection circuit for operating pulses (a trigger circuit with two stable states) and to the inputs of a matching circuit. The output of the operating pulse selection circuit is electrically connected to the second inputs of the matching circuits. Such an embodiment of the analyzer ensures the selection of working pulses corresponding to the extreme values of the function of the process under study.

In addition, in the analyzer, a trigger with two steady states and a reset diode array are applied to form the output pulse.

The lattice is included in the feedback circuit of the shaping circuit, by means of which the circuit returns to its initial state.

FIG. Figure 1 shows a curve depicting a random process of varying the voltage of a part over time, expressed in terms of the electrical voltage (for example, the deformation of a node, expressed by means of strain gauges and an amplifier); in fig. 2 is a block diagram of a random process analyzer.

The letters BWG, etc. (Fig. 1) on the curve indicate extreme stress points. The entire voltage range can be divided into a number of subbands straight, parallel to the time axis. These lines can be called voltage levels and numbered.

M 124697-2 -

in order of increasing. The subband width in this graph is denoted by At /, and level 3 is zero.

If the voltage range is called the absolute value of the difference of the ordinates of the adjacent extreme points of the curve, and the asymmetry of the range is the half-sum of the ordinates of the extreme points, then the magnitude of the range and its asymmetry are determined by which subband and into which the extreme points pass. If the extreme point is somewhere between two levels, then it is conditionally considered that its ordinate is equal to the half-sum of these levels. Consequently, the magnitude of the magnitude will be a multiple of AU, the asymmetry of the same krgna-.

The task of counting spans with sorting them by magnitude and asymmetry is reduced to sorting them according to the position of the beginning and end of the span (extreme points) in the voltage subranges. The basic idea, the implementation of which made it possible to construct the proposed analyzer, is as follows.

In order to determine the location of the span in the system of levels, it is sufficient to determine the nearest levels that intersect the curve, the voltage after passing the extreme points of the beginning and end of the span. The difference between these levels plus the width of the subrange gives the magnitude of the swing, and the half-sum of the levels gives asymmetry. For example, the range of a BV is fully characterized by points BV, the span of DE-points D E, and so on.

The device's circuit selects these points of intersection of the levels from all the others, and the successive passage of voltage through two such points triggers the corresponding counter, taking into account the range of a certain magnitude and asymmetry. ,

The random process analyzer consists of the following main nodes: / - integral amplitude discriminator, // - working pulse selection circuit, /// - diode coincidence circuits, IV - shaping circuits, V - diode reset grid, VI - diode output coincidence circuits, VII - scaling circuits and electromechanical “b.

The integral amplitude discriminator is assembled on Schmitt circuits. By using diode forming cells, it has been achieved that the output of short pulses of one polarity (negative) when the input signal crosses the threshold limits both with increasing and decreasing voltage of the signal. These pulses are then sent to the matching circuit of this discriminator channel. Odin; simultaneously, with this, the voltage drop from one arm of the Schmitg circuit of each channel controls the operation of the circuit // selection of working pulses. The sign of this difference depends on whether it increases or decreases, the detection of the input signal at the intersection of the circuit trigger level; Schmitt

The scheme // of the selection of working pulses is a trigger with two stable states, which is controlled by alternating pulses from the discriminator / to one of the control grids. Thus, the dip-hole circuit will be transferred only by the first of a series of pulses of one direction, coming to it from all channels of the discriminator, i.e. it will be transferred at the moments of intersection of the input voltage of the nearest level following extreme voltage values. The circuit selects points like B C D and so on. At the output of the circuit, the selection also forms short negative pulses that go to the cathode

repeater and, from its output, to diode circuits /// matches. In the course of the /// matching circuit, a signal appears only if the input signals from the channel and from the // selection circuit of the working pulses are simultaneously received.

Thus, the joint operation of the first three nodes /, //, /// of the device allows to solve the first part of the task - to isolate the working pulses corresponding to the beginning and end of the input voltage sweep, and to send these pulses through the appropriate channels.

Next, the working pulse is fed to the input of the forming circuit IV. This circuit represents a trigger with two stable states with dual control. The first control circuit receives a working impulse from the coincidence circuit, ///, which transfers the circuit to the second state. In this state, the circuit is held until a reset pulse arrives at the second control circuit, coming through the reset diode latch V when any other forming circuit is triggered. The reset pulse returns the circuit to its original, first, state. Diode V-grating provides selective resetting of forming circuits. A reset impulse is formed from the voltage drop at the output of the forming circuit as it transitions from the first state to the second and through the diode grating enters all other forming circuits except this one. The delay circuits at the input of the diode array provide an output signal of the required duration.

Diode VI output coincidence circuits, which receive input voltages from the shaping circuits, are intended to form the final output signals of the instrument that fall on the recalculated Circuits and are ultimately considered electromechanical counters. Each diode circuit VI receives voltage from the two shaping circuits. The number of these diode circuits is determined by the number of combinations of two from among the forming circuits n, i.e.,

for four levels, and for twelve levels. ,

The coincidence circuit diode VI produces an output pulse only if the forming circuits to which it is connected work immediately one after the other. Sequential operation of two forming circuits causes the appearance of one output pulse, falling on a specific counter, counting the sweeps of a certain size and asymmetry.

Thus, the joint operation of nodes IV, V and VI also solves the second part of the task - the formation of two working pulses corresponding to the beginning and end of the span, the output impulse arriving at the counter, the double number of which defines as a quantity, and the span asymmetry . The sign of the span, i.e., the correspondence to its increase or decrease in voltage, is not taken into account and the counter is counted for the span of both signs.

Subject invention

Claims (2)

1. A random process analyzer for determining the asymmetry value and the number of strain cycles and other quantities presented. in the form of a proportional electric signal, containing amplitude integral discriminator, coincidence circuits, triggered schemes, recalculated circuits with electromechanical counters, differing from the fact that, in order to separate the working pulses corresponding to the extreme values of the function of the process under study, Zana with the entrance - 3 No. 124697 working pulse selection circuits (a trigger circuit with two stable states) and with inputs of a matching circuit, and the output of a working pulse selection circuit is electrically connected with the second inputs of a matching circuit. 2. In the device of claim 1, an application for generating an output pulse of a trigger with two stable states and a reset diode array incorporated into the feedback circuit of the shaping circuit, by means of which the circuit returns to its original state. 63 & U T 2- l-ZuU 0-3uU r1 D jj /-four F3J Ij Ij Fig i