SU525238A1 - Time discriminator - Google Patents

Description

(54) TEMPORARY DISCRIMINATOR

one

The invention relates to electronic automation and can be used to determine the temporal position of a pulse signal.

Known discriminator containing

two cascades, each of which contains a series-connected integrator and subtractive device. A pulse signal is applied to the inputs of both channels. The outputs of the first and second cough are connected to the inputs of the subtractor. Selection half-stumps are fed to the subtractive device.

Switching the useful signal in the process of its integration significantly reduces the accuracy of determining the temporal position of the conditional accuracy, especially with a small duration of the integrated signal. In addition, the presence of two channels of signal processing leads to the complexity of the device.

A delay element and a large-scale element are introduced into the proposed device, the integrator output being connected to the inputs of the delay element and the scale element.

cop, whose outputs are connected to the input of the VI reader. This makes it possible to increase the accuracy of the device.

FIG. 1 is a block diagram of a temporal position discriminator; in fig. Figure 2 shows diagrams explaining the operation of the discriminator.

The pulse signal is fed to the input of integrator 1. The output of integrator 1 is connected to the inputs of delay element 2 for a time interval T and to the input of scale element 3 with a transmission coefficient of 0.5. The outputs of elements 2 and 3 are connected to the inputs of the subtractor 4, and its output is the output of the discriminator.

FIG. Figure 2a shows a time diagram of the voltage of the input pulse signal, where T is the point corresponding to the temporal position of the center of the area of this plot, that is, the characteristic point of the input signal under study. In the integrator 1 is the integration of the input pulse. The voltage pattern at the output of the integrator 1 is shown in FIG. 2 b. It corresponds to the integral of the voltage input pulse. At the end of the integration process of the input pulse, the voltage at the integrator output reaches the value M, which corresponds to the total area of the signal. In this case, the time position of the 0.5 M point will be equal to Ti.

The voltage at the output of the delay element 2 repeats the voltage at the output of the integrator 1, but is shifted in time by the value of T, with T being constant, a characteristic of this delay element 2, thus the temporal position of the point 0.5 M corresponding to the center of the area of the eshora, the input signal, is equal. FIG. 2 g of the voltage plot at the output of the scale element 3 with a transfer coefficient of 0.5. The maximum of this voltage will be 0.5 M, which corresponds to half of the integral of the input pulse. At the output of the subtracting device 4, a voltage appears, representing the voltage difference from the output of the delay element 2

and a scale element 3 with a transfer ratio of 0.5. The plot of this voltage is shown in FIG. 2 days

As can be seen from the above diagrams, the voltage transfer at the output of the subtracting device occurs at the moment Ta TG, corresponding to the center of the pulse input signal, but delayed relative to the true center of the area of the diagram by a constant value T which can be taken into account in the processing of the measurement result.

Claims (1)

Invention Formula A time discriminator containing an integrator and a subtractive device, which is characterized by the fact that, in order to improve accuracy, a delay element and a large-scale element are introduced in it, the integrator output being connected to the inputs of the delay element and the main element whose outputs are connected to the subtracting device input. S M l f