RU2698965C1 - Two-channel comparator without dangerous failures - Google Patents

Abstract

FIELD: transport traffic control systems.

SUBSTANCE: invention relates to railway automation for controlling train movement. In a two-channel comparator, all the outputs of the computer are compared in pairs, wherein the output of one computer is connected to one inputs of two AND logic elements, and the outputs of the other computer are connected to other inputs of said elements, the inputs of the first logic element are straight, and the second one – inverse, with outputs of logic elements are connected inputs R and S flip-flop, outputs Q and Ǭ of which through capacitor are connected to poles of input transformer winding, poles of the second winding of which are connected to the inputs of the diode bridge, the outputs of which are connected to the poles of the control relay winding.

EFFECT: higher safety of train movement due to reliable generation of control orders by comparing results of operation of two computers at each output involved in formation of control orders.

1 cl, 2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of railway automation and can be used to regulate the movement of trains.

State of the art

A device for comparing the operation of three computers is known [Patent No. 2173278, Relay-computer centralization, Field Yu.I. dr., Publ. 09/10/1999. Bull. No. 25], based on the control of the reliable operation of three computers, which is performed by comparing the results of the computer in two cycles.

The disadvantages of the device is that incomplete monitoring of the operation of the computer is carried out, which does not guarantee the exclusion of a dangerous situation, and the comparison circuit has a cumbersome structure, which is made on a relay of the first reliability class.

A device for comparing the operation of three computers is known [Patent No. 2265541, Relay-computer centralization, Polevoy Yu.I., Polevaya L.V. et al., Publ. 09/27/2004. Bull. No. 25], based on the control of the reliable operation of three computers, which is performed by comparing the results of the computer in one of the clock cycles.

The disadvantages of the device are the same disadvantages: incomplete control of the computer, and the comparison circuit has a cumbersome structure.

This technical solution is selected as a prototype.

Disclosure of invention

The technical result, which this technical solution is aimed at, is to increase the safety of train traffic due to the reliable formation of control orders by comparing the results of two computers at each exit participating in the formation of control orders.

которого через конденсатор соединены с полюсами входной обмотки трансформатора, полюса второй обмотки которого соединены с входами диодного моста, выходы которого соединены с полюсами обмотки управляющего реле.The technical result is achieved by the fact that a two-channel comparator without dangerous failures compares the status of the outputs of the computer, characterized in that the status of all the outputs is compared in pairs, for this the output of one computer is connected to one of the inputs of two logical elements And, and the outputs of another computer to other inputs of these elements , the inputs of the first logic element are direct and the second are inverse, the inputs of the trigger R and S are connected to the outputs of the logic elements, the outputs Q and

which through a capacitor are connected to the poles of the input winding of the transformer, the poles of the second winding of which are connected to the inputs of the diode bridge, the outputs of which are connected to the poles of the winding of the control relay.

In FIG. 1 shows a diagram of the inclusion of a control relay from two computers; in FIG. 2 is a timing chart.

In FIG. 2 shows the following notation:

1 - the first computer;

2 - second computer;

3 - the main block of the algorithm of the first computer;

4 - control unit of the first computer;

5 - block lengthening the cycle of operation of the first computer;

6 - the main block of the algorithm of the second computer;

7 - control unit of the second computer;

8 and 9 - logical elements And;

10 - RS trigger;

11 - capacitor;

12 - transformer:

13 - diode bridge;

14 - positive control relay (translation of the arrow in the positive position).

(инверсный) через конденсатор 11 соединен с полюсами первичной обмотки трансформатора 12, выходы вторичной обмотки которого соединены с входами диодного моста 13, выход которого соединены с полюсами плюсового управляющего реле 14.A circuit of a two-channel comparator without dangerous failures is shown in FIG. 1. Computers 1 and 2 operate according to the program, the blocks of the algorithm of which are indicated by the positions 3, 4, 5, 6 and 7. In blocks 3 and 6, the main program is enclosed, in blocks 4 and 7, the part of the program that verifies the fulfillment of safe transfer conditions in plus position of the route arrow. Block 5 is provided to increase the cycle time of the computer 1 relative to the cycle of the computer 2 and a half times. With the output of computer 1 from block 4, communication with the upper inputs of logic elements 8 and 9 is carried out, with the output of computer 2 from block 7, communication with the lower inputs of logic elements 8 and 9 is made. The outputs of elements 8 and 9 are connected respectively to inputs S and R of trigger 10 outputs Q (direct) and

(inverse) through a capacitor 11 is connected to the poles of the primary winding of the transformer 12, the outputs of the secondary winding of which are connected to the inputs of the diode bridge 13, the output of which is connected to the poles of the positive control relay 14.

Translation arrows in the positive position is as follows (Fig. 1). Both computers 1 and 2 operate in a closed loop. Almost all information is processed by both computers in the main blocks 3 and 6. Blocks 4 and 7 perform only one operation: they switch the arrow to the plus position and checks all the safety conditions for train traffic. If these conditions are met, then from the outputs of block 4 from the first computer in a pulse mode, the signals of the logical unit ЛЕ are received at the upper inputs of logic elements 8 and 9. Under the same conditions, from the outputs of block 7 from the second computer in a pulsed mode, the signals of the logical unit ЛU also arrive at the lower inputs of logic elements 8 and 9. Thanks to block 5, which lengthens the operation cycle of the first computer by one and a half times, pulses from blocks 4 and 7 are issued asynchronously. This makes it possible to periodically simultaneously increase the potentials at the inputs of the element 8 and lower the potentials at the inputs of the element 9. In FIG. Figure 2 shows the timing diagrams of the appearance of potentials at the outputs of computers1 and computers2, as well as the coincidence diagram of these pulses.

When the potentials coincide, the potentials change at the inputs of the logic elements 8 and 9 at their outputs of the trigger 10, due to which a current circuit is created through the capacitor 11 and the primary winding of the transformer, and an EMF is induced on the secondary winding of the transformer 12. By means of the diode bridge 13, the control positive relay 14 is excited, the arrow (not shown in Fig. 1) is translated into the positive position.

Claims (1)

A two-channel comparator without dangerous failures, comparing the status of the outputs of a computer, characterized in that they compare the status of all outputs in pairs, for this the output of one computer is connected to one of the inputs of two logical elements AND, and the outputs of another computer to other inputs of these elements, the inputs of the first logical element are direct, and the second is inverse, the outputs of the logic elements are connected to the inputs R and S of the trigger, the outputs Q and

which through a capacitor are connected to the poles of the input winding of the transformer, the poles of the second winding of which are connected to the inputs of the diode bridge, the outputs of which are connected to the poles of the winding of the control relay, the remaining computer outputs are checked similarly.

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