SU845163A1 - Spectrogram analysis device - Google Patents

Description

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The invention relates to automation and computing and is intended for. modeling of complex spectra whose shape is similar to the original spectra recorded on a chart tape from the output of an analytical instrument.

A device for analyzing spectrograms is known, comprising a scanner, a registering device, an adder and blocks of formation of components, each of the blocks of forming components comprising a driver of triangular functions, a generator of Gaussian functions, a generator of Lorentz functions, a resistor element and a mixer 111.

However, this device has a low accuracy.

The closest to the invention in its technical essence is a device for analyzing spectrograms containing shaper components, each of which is performed. not from the first control unit, the first functional formulater, the first and second functional transducers, and the second adjustment unit, the registration unit, the series-connected adder, the unit

Expressions and a scanner, the output of the adder is connected to the first input of the registration unit, the output of the scanner is connected to the second input of the registration unit and to the inputs of the driver components, each of which is connected to the input of the corresponding first adjustment block, the output of each of the second adjustment blocks.

10 is connected to the output of the corresponding driver of the components, the outputs of the driver of the components are connected to the corresponding inputs of the adder G2.

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However, this device does not allow to directly form the derivatives from the simulated peaks and make a quick transition from the simulation of the peaks, for example, Gaus20 of a social form to the simulation mode of the derivatives from these peaks. Simulation of the derivative is possible only with low accuracy and time consuming with the help of two component formers that simulate two identical peaks of different polarity. The low accuracy of the simulation is due to the difficulty of selecting the parameters of different-field peaks shifted relative to each other.

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other coordinate X. The number of adjustments required to change the parameters of the derivative is doubled, which determines the low simulation speed.

The aim of the invention is to improve the accuracy of the device.

This is achieved by the fact that in the device for analog-spectrograms containing the shaper components, each of which is made of the first adjustment unit, the first functional generator, the first and second functional transducers and the second adjustment unit, the recording unit, connected in series adder, correction unit and a scanner, the output of the adder is connected to the first input of the registration unit, the output of the scanner is connected to the second input of the registration unit and to the inputs of the component drivers, the input of the corresponding first adjustment block is connected to each of which, the output of each of the second adjustment blocks is connected to the output of the corresponding driver of the components, the outputs of the driver of the components are connected to the corresponding inputs of the adder, the second functional driver of the first and second buffer stages are entered into each of the driver of the components , a shaping mode switch and a differential amplifier, the output of the first adjustment unit is connected to the first inputs of the first and second the output of the first buffer stage through the first functional generator and the first functional converter are connected to the first input of the differential amplifier, the output of which is connected to the input of the second adjustment unit, the output of the second buffer stage is connected through the second functional converter and the second functional converter the first input of the mode switch, the second input of which is connected to the second input V cerned buffer stage and a terminal connecting the external reference voltage, a second input of the first buffer stage connected to the first output of the switch mode fopmipovan IYA, a second output connected to the second input of the differential amplifier.

Figure 1 shows the block-diagram of the device; in fig. 2 shows diagrams of the operation of the device for analyzing spectrograms.

The device contains the formers of components 1, the first adjustment blocks 2, the first and second buffer stages 3 and 4, the first and second

functional formers 5 and b, first and second functional converters 7 and 8, formation mode switches 9, differential amplifiers 10, second adjustment blocks 11, scanner 12, correction unit 13, adder 14 and recording unit 15.

A device for analyzing spectrograms operates as follows.

The sweep voltage (in the + 10V range) is supplied from the output of the scanner 12 to the inputs of the driver components 1 and the second input of the recording unit 15 (X input of the two-coordinate recorder). The conversion of the sweep voltage starts in the first adjustment block 2, in which the input sweep voltage is shifted and the gain is adjusted. These adjustments change the position and width of the simulated peak or the first derivative of it. The converted sweep voltage is simultaneously applied to the first (inverting) inputs of the first 3 and second 4 buffer stages, which shift the output voltage of the first adjustment unit 2 to a constant value along the X coordinate. The offset voltage is supplied to opposite inputs buffer stages 3 and 4, their output voltages are shifted in different directions relative to the voltage coming from the output of the first adjustment unit 2. From the outputs of the buffer stages 3 and 4, the converted sweep voltages are fed to the inputs of the first and second functional formers 5 and b, in which triangular-shaped voltages are formed symmetrically shifted relative to the zero value of the output voltage of the first adjustment block 2 (X coordinate of Fig. 2, and ). The voltages from the outputs of the first 5 and second b functional formers are fed to the inputs of the first 7 and second 8 functional converters, each of which forms one half of the selected functional head dence (e.g., a Gaussian function type), a second symmetrical half of curve is generated due to the inverse slope of the triangular function. The functional dependencies generated in this way arrive at the different-pole inputs of the differential amplifier 10, from the output of which the differential spectrum simulating the functional dependence of the first derivative on the peak with the same parameters is taken. The output voltage of the differential amplifier 10 through the second adjustment unit 11 is supplied

one of the inputs of the adder 14. The total voltage is fed to the input of the correction unit 13 and the first input of the registration unit 15 (Y-input, two-coordinate recorder). The output voltage of the correction unit 13, proportional to the rate of change of the simulated voltage, is fed to the input of the scanner 12 and controls it so that the playback speed of the simulated curve in the recording unit 15 does not exceed the maximum allowable value for this type of recorder.

To ensure a quick change of simulation modes, a shaping mode switch 9 is introduced into each component former, which controls the switching of signals in the input circuits of the first buffer stage 3 and the differential amplifier 10.

In the formation mode, the second (inverting) input of the first buffer stage 3 and the second (non-inverting) input of the differential amplifier 10 through the first and second outputs of the formation mode switch 9 are shorted to ground. At the same time, the top of the triangular dependence, removed from the output of the first functional driver 5, is formed at the transition of the internal sweep (output voltage of the first adjustment unit 2) through the zero position, and the signal from the output of the second functional converter 8 does not flow to the second input of the differential amplifier 10. the formation of one functional dependence with a maximum associated with the position of the zero of the internal sweep (zero position in the Y coordinate (Fig.2.6, c).

In the first derivative formation mode, the bias voltage UQ, is applied to the second (inverting) input of the first buffer stage 3 via the first output of the mode switch .9, and the non-inverting (second) input of the differential amplifier 10 is connected to the second output through the second output of the formation switch 9 functional converter 8..

The implementation of such a device for analyzing spectrograms allows one to accurately form symmetric peaks and first derivatives of them, regardless of the time linearity of the input sweep coming from the output of the sweep unit. This makes it possible to use the stabilization of the recording speed and eliminate the errors associated with the inertial properties of the recorder when recording nepi derivatives from peaks with small width and maximum amplitude.

Claims (2)

1. USSR author's certificate No. 458840, cl. G About G 7/48, 10/30/73 2 .; USSR Author's Certificate in Application No. 2591925 / 18-24, cl. G 06 G 7/48, 10/17/78. . . five V - X h xg N - y