SU1505826A1 - Track circuit - Google Patents

Abstract

The invention relates to railway automatics and telemechanics, in particular, to devices for monitoring the freeness of rail sections. The purpose of the invention is to increase reliability. The rail circuit contains a signal source 1, a protection unit 5, to the output of which analog multipliers 6, 7, 8 and delay element 9 are connected, integrators 10 and 11 connected to inputs of a subtractor 12 connected to a scale gain unit 13, an analog divider 14 connected with the input of the square-root extraction unit 15. The analog divider 17 is connected to the outputs of the scale gain unit 13 and the integrator 10 and to the input of the switch, the output of which is connected to the signal conversion unit 19 connected to the output of the analog-digital converter 20. The output of the block 19 is connected to the input of the digital-to-analog converter 21, to the output of which is connected track relay 22. The signal coming from the rail line is converted into signals proportional to the dispersion of the regular component of interference, the full dispersion of the signal and the fluctuation component of interference. Using switch 18, a non-linear signal conversion function is selected by block 19, which, after conversion by digital-to-analog converter 21, is fed to a track relay 22. 1 sludge.

Description

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The invention relates to railway automation and telemechanics, in particular to devices for controlling free rail sections.

The purpose of the invention is to increase reliability.

The drawing shows the functional circuit of the track circuit.

The rail circuit contains a source of 1 signal connected via a choke transformer 2 to a rail thread m 3 of a rail line, at the other end of which a protective block 5 is connected to the rail thread through a choke transformer 4, to the output of which analogue multipliers 6 are connected -8 and delay element 9. The output of delay element 9 is connected to the input of an analogue multiplier. 1 6, the output of which is connected to the input of the integrator 10. The output of the analog multiplier 8 is connected to the input of the integrator 11, and the outputs of the integrator 10 and 11 are connected to the inputs of the subtractor 12, the output of which is connected to the input of the scale gain unit 13 and connected to the output of the analog multiplier 7 input. The second input of the analog divider 14 is connected to the output of the square root extraction unit 15, the input of which is connected to the output of the scale gain block 16, the input of which is connected to the output of 10. Analog divider 17 is connected by its inputs to the output of block 13 of scale gain and to the output of integrator 10, and by output to the input of switch 18 connected by its outputs to inputs of block 19 of signal conversion, the other inputs of which are connected to outputs of analog-digital converter 20 whose input is connected to the output of the analog multiplier 7. The outputs of the signal conversion unit 19 are connected to the inputs of the digital-to-analog converter 21, to the output of which the track relay 22 is connected,

The rail circuit works as follows.

With a free rail line, the signal from the source 1 of the signal enters through the choke transformer 2 to the plugs 3 and through the choke transformer 4 to block 5, then the signal goes to the inputs of the analog multipliers 6-8. At the second input of the multiplier 6, the signal enters through the delay element 9. From the pins of multipliers 6 and 8, the signal goes to the inputs of integrators 10 and 11, respectively. At the output of integrator 10, a signal equal to the dispersion of the regular component of the noise is formed, and at the output of integrator 11 a signal is formed that is equal to the full dispersion of the signal.

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From the outputs of the integrators 10 and 11, the signal is fed to the inputs of the subtractor 12, the output of which produces a signal equal to the dispersion of the fluctuation component of the noise, which is fed to one of the inputs of the analog divider 14. The large-scale block of the 16-component interference is doubled by the large-scale gain unit 16. From the obtained value in block 15, the square root is extracted and fed to the second input of the analog divider 14. At the output of the divider 14, the signal is fed to the second input of the analog multiplier 7. The scale gain block 13 doubles the dispersion of the interference component of the interference and feeds it to the input of the analog divider 17, the other input of which receives a signal from the output of the integrator 10. The signal from the output of the divider 17 is fed to the input of the switch 18. The switch 18 is made on the basis of double comparators, the outputs of which form you ode switch 18. The signal at each output from the switch 18 is formed in contact with the voltage at the input at a certain interval. The result of multiplying the input signal with the parameter formed at the output of the analog divider 14 from the output of the analog multiplier 7 is fed to the input of the analog-digital converter 20, from the output of which the signal in digital form is fed to the inputs of the signal conversion unit 19. In block 19, the nonlinear conversion of the input signal takes place in accordance with the control signals from the outputs of the switch 18. The digital signal at the output of the block 19 is converted using an analog-to-digital converter 21 to analog form and fed to the track relay 22. Thus, signal conversion on the track relay in accordance with the change in the dispersion of the components of interference.

Claims (1)

Invention Formula A rail circuit containing a signal source connected to one end of a rail line, connected via a Drossel transformer to a rail line to which, at the other end, a protection unit and a track relay are connected via a second choke transformer, which is different. that, in order to increase reliability, it is equipped with a signal conversion unit, digital-analog and analog-digital converters, analog multipliers, analog dividers, integrators, mashtab gain blocks, a root calculator, a delay element and a switch connected to the output of the first analog divider, the first input of which is connected to the output of the first scale gain unit, the input of which and the first input of the second analog divider are connected to the output of the subtractor, the first input of which is connected to the output of the first integrator, the input of which is connected to the output of the first analog multiplier, whose inputs, first inputs of the other multipliers and the input of the delay element are connected to the output of the protection unit, the output of the second multiplier is connected to the input of the second integrator, the output of which is connected to the second inputs of the subtractor, the first analog divider and the second block A scale gain, the output of which is connected to the input of the root calculator, the output of which is connected to the second input of the second analog divider, the output of which is connected to the second input of the third analog multiplier, the output of which is connected to the input of the analog-digital converter, the outputs of which are connected to the inputs of the conversion unit signal, the other inputs of which are connected to the switch outputs, and the outputs - to the inputs of a digital-to-analog converter, to the output of which the track relay is half connected, and the element output delay connected to the second input of the second analog multiplier.