SU1157563A1 - Device for determining spectral density of signal power - Google Patents

Abstract

DEVICE1 DURING DETERMINATION OF THE SPECTRAL S10TH OF THE SIGNAL POWER containing a series-connected signal source, a recording unit and a playback unit connected by outputs to a playback unit of time signals with the first: the control bus, the second control bus, the second pulse generator connected to the first input of the recorder and the first analyzer A ktra connected by a first input with an output of a key element, characterized in that, in order to increase the reliability of the analysis results in real time, a second spectrum analyzer, adder, delay element, subtraction unit, comparator, clock generator, time interval set ,: code converter and code sensor, which is connected to the auxiliary input of the recording unit, the code converter being connected to the output of the time signal playback unit and output to the second one Valid comparison unit connected to the first output of the pulse inputs directly and through. 9 block set time intervals and clock generator. connected by the output to the second input of the first spectrum analyzer, to the first input of the second spectrum analyzer and to the input of the second pulse shaper connected via a comparator to the second control bus and to the output of the subtraction unit connected by the inputs to the output of the first spectrum analyzer and the first to the input of the summator and to the connected interconnections to the output of the second analyzer of the spectrum and the second input of the adder connected by the output to the second input of the recorder, with this key 4 connected to the output via the delay element to the second input of the second spectrum analyzer.

Description

The invention relates to instrumentation, namely, devices for determining the spectral power density of signals. A device is known for determining the spectral power density of signals containing interconnected reference frequency generator, recording and reproducing blocks, frequency discriminator, generator, control unit, mixer, and filter. The disadvantage of this device is the low fidelity of the analysis results in real time. It is also known a device for determining the spectral power density of signals containing a series-connected signal source, a recording unit of a reproduction unit connected by outputs to a reproducing unit of time signals and to the first input of the key element, the second input connected to the output of the first pulse generator, block comparison, connected by the first input to the first control bus, the second control bus, the second pulse generator connected to the first input of the recorder and en recuperators spectrum pervm input coupled with the output key element 2. The disadvantage of the known device is not enough high fidelity of the results of the analysis in real time. The purpose of the Invention is to increase the reliability of the results of the analysis in real time. The goal is achieved by the fact that a device for determining the spectral power density of signals, comprising a serially connected signal source, a recording unit and a playback unit, connected by outputs to a playback unit of time signals and to the first input of a key element, a second input connected to the output of the first pulse generator, a comparison unit connected by the first input to the first control bus, the second control bus, the second pulse shaper connected in vodo to the first input ohm recorder, and the first spectrum analyzer, connected to the first input with the output of the key element, introduced the second Siyektra analyzer, adder, delay element. 1 3 subtraction unit, comparator, clock generator, time interval setting unit, code converter and code sensor, which is connected to the auxiliary input of the recording unit, the code converter being connected to the output of the time signal reproducing unit and output to the second input of the comparison unit, connected by an output to the inputs of the first pulse generator directly and through a block of setting time intervals and a pulse generator connected by an output to the second input of the first analysis Ator -spectrum to PEROVA g input of the second spectrum analyzer and to the input of the second pulse shaper connected via a comparator with a second control bus and access vtitani unit connected to inputs connected ,; between the output of the first spectrum analyzer and the first input of the adder and the interconnected output of the spectrum analyzer and the second input of the adder connected by the output to the second input of the recorder, while the key element is connected by the output through the delay element to the second input of the second spectrum analyzer. This leads to an increase in the fidelity of the results of spectral analysis due to the consideration of the statistical characteristics of the analyzed signals, taking into account the monitoring of the results of spectral analysis. The drawing shows a block diagram of the proposed device. The device for determining the spectral density of the Signal Power contains a serially connected source of signal 1, a recording unit 2 and a playback unit 3 connected by outputs to a unit 4 for reproducing time signals and to the first input of the key element 5, the second input connected to V with the output of the transducer. a pulse generator 6, a comparison unit 7 connected by a first input to a first control bus 8, a second control bus 9, a second output driver 10 pulses connected to the first input; the recorder 11, and the first spectrum analyzer 12, connected by the first input to the output of the key element,

5.Also, it contains a second, - / spectrum analyzer 13, an adder 14, a delay element 15, a subtraction unit 16, a comparator 17, a clock pulse generator 18, a time interval setting unit 19, a transmitter 20, and a sensor 21 codes, which is connected to the auxiliary input of block 2 of the recording, and the converter of the 0 code is connected by input to output 4 of the reproduction of time signals and output. - to the second input unit, Comparison Unit 7, United & output with inputs of the first organizer 6 pulses. directly and through block 19 of setting time intervals, the generator 18 clock pulses connected by the output

to the second input of the first analyzer 12 of the spectrum, to the first input of the second 20 of the analyzer t3 of the spectrum and to the input of the second shaper 10 pulses connected through the comparator 17 with the second control bus 9 and with the output of the subtraction block 16 connected

inputs to the output 1 connected between each other, the first spectrum analyzer 12 and the first input of the adder 14 and the output between the second spectrum analyzer 13 and the second input of the adder 14 connected by the output to the second input of the recorder 11, 30, this key element 5 is connected by the output through the element 15 Delays to the second input 35 of the spectrum analyzer 13.

In recording unit 2, the analog-in is simultaneously recorded. formations from the output of source 1 signal

and time signals from the sensor output 21 4o code. When playing back recorded and 11 analog information, from the outputs of the playback unit 3 enters the inputs of the key element 5 and the playback unit 4 of the signals

of time. The output signal of the comparator unit 7 is generated at the time of coincidence, corresponding to the time signal from the output of the converter 20 of the code and the analysis start signal coming from the first control bus 8 On the output signal of the first driver 6 pulses, the duration of which is set by the time interval setting unit 19, the key Element 5 transmits analog information to the inputs of the first 12 and second

13 spectrum analyzers.

 The operation of subtraction unit 16 consists in inverting the signals from the first spectrum analyzer 12 and summing them with the Q inverted signals of the second spectrum analyzer 13. Comparator 17 generates a signal displaying the signal disconnection from the output of subtraction unit 16: beyond certain limits, the value is fed to the comparator 17 from the second control bus 9. The signals from the output of the comparator 7 generate a control signal for the recorder to the recorder t

The information input of which receives the sum of the signals from the first 12 and second 13 spectrum analyzers. In this way, the results of the frequency analysis of the sections of the realizations of the input signal are recorded, the fidelity of the analysis of which is below certain limits. The signal delay generated by AND OF delay element 15 allows the use of two asynchronous estimates of the current spectrum of the input signal.

The use of the invention allows to significantly improve the accuracy of the results of spectral analysis of slow processes in real time.

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Claims (1)

A DEVICE FOR DETERMINING A SPECTRAL DENSITY OF SIGNAL POWER, comprising a signal source, a recording unit and a playback unit connected in outputs to a time signal reproducing unit and to a first input of a key element, a second input connected to an output of a first pulse shaper, a comparison unit connected by a first input to the first control bus, the second control bus, the second pulse shaper connected by the output to the first input of the recorder, and the first spectrum analyzer ; connected by the first input to the output of the key element, characterized in that, in order to increase the reliability of the analysis results in real time, a second spectrum analyzer, an adder, a delay element, a subtraction unit, a comparator, a clock generator, a time interval setting unit are introduced into it, ; a code converter and a code sensor that is connected to an additional input of the recording unit, the code converter being connected by an input to the output of the time signal reproducing unit and an output to the second input of the block comparison connected by the output to the inputs of the first pulse shaper directly and through. time interval setting unit 'and a clock pulse generator connected by an output to the second input of the first spectrum analyzer, to the first input of the second spectrum analyzer and to the input of the second pulse shaper connected via a comparator to the second control bus and to the output of the subtraction unit, connected by inputs to the connected between the output of the first spectrum analyzer and the first input of the adder and the interconnected output of the second spectrum analyzer and the second input of the adder connected to the output of the second the input of the recorder, while the key element is connected by the output through the delay element to the second input of the second spectrum analyzer. -SU 1157563 D 1157563