SU1363275A1 - Apparatus for identifying information - Google Patents

Abstract

The invention relates to automation and computing and can be used in diagnostic systems. The purpose of the invention is to improve the accuracy of information recognition by the introduction of two comparators, two AND elements, a pulse generator, and a block for setting time intervals, which makes it possible to rearrange the nonlinear characteristic of the converter over a wide range. 2 Il. from 05 WITH 1C SP

Description

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The invention relates to automation and computer technology and can be used in solving problems of determining the technical condition of industrial products.

The purpose of the invention is to increase the accuracy of the device.

FIG. 1 is a block diagram of a device for recognizing noise signals in FIG. 2 - diagrams of device voltages.

The device contains an input amplifier 1, two comparators 2 and 3, an adaptation block 4, the first 5 and second 6 And elements, an integrator 7, a pulse generator 8 and a time interval setting block 9.

The device works as follows

An electrical signal of a random nature is fed to the input of the device, which is amplified by the input amplifier 1 and is fed to the inverting input of the first comparator 2 and the non-inverting input of the second comparator 3. From the output of the adaptation block 4 to the non-inverting input of the first comparator 2 and the inverting input of the second comparator 3 are applied voltages that can vary within wide enough limits and perform

the role of the top

(and clause c)

and lower

(and

rm, n

the thresholds for the first and second comparators, respectively.

The output of the first comparator 2 removes a sequence of pulses of a rectangular shape, the duration of which is proportional to the residence time of the analyzed signal below the upper threshold level (Un. 4). From the output of the second comparator 3, a sequence of pulses is removed, the duration of which is proportional to the residence time of the analyzed signal above the lower threshold level ( and j). At the output of the first element I, a sequence of pulses appears, the duration of which is proportional to the time the test noise signal is within the amplitude level formed by the upper and lower threshold values.

Thus, elements 2, 3 and 5, together with adaptation unit 4, allow non-linear conversion of the input signal in accordance with the expression

 Y (t) (t) F (X)

where X (t) is the input noise signal; Y (t) is the output signal, F (X) 1 for ll, x.U is the non-linear operator for the conversion j

O-in the remaining cases, and form an indicative description of the analyzed signal based on its time spent within a given amplitude level (interval), i.e. the signal is converted to a value proportional to the density distribution of the instantaneous values of its amplitude.

From the output of the first element I 5, the converted signal is fed to one of the inputs of the second element I 6, to which pulses of countable frequencies are also sent from the generator 8 pulses

25 ZO

35

From the output of the second element I 6 pulses of a counting frequency, the number of which is proportional to the residence time of the analyzed signal within a predetermined amplitude interval (and n c i i v), arrive at the input of the reversible counter 7, which, together with the time interval setting unit 9, counts the number of pulses for the selected analysis time. This number has a one-to-one correspondence with the shape of the signal recognition and is further used as its attribute when comparing with other analyzed signals.

Claims (1)

Formula Isob.teni A device for recognizing information containing an input amplifier, an adaptation unit and an integrator, characterized in that, in order to improve the accuracy of the device, two comparators, two AND elements, a pulse generator and a time interval setting unit, an integrator are implemented on the reversible counter and the adaptation unit is designed as a source of reference voltages, the input of which is the first control input of the device, and the first and second outputs of the source of reference voltages are connected to the non-inverting input of the first comp The aarator and with the inverting input of the second comparator, the amplifier input is the information input of the device, the ei o output is connected to the inverting input of the first comparator and to the inverter 9 input of the second comparator whose outputs are connected to the inputs of the first element And whose output is connected to the first input of the second element And, the second entrance is connected to the code. pulse generator, and the output is connected to the information input of the reversible counter, the control input of which is connected to the output of the time interval unit, whose input is the BTo pbtM control input of the device, the output of the reversible counter is the output of the device. figure 1