RU2625217C1 - Device for controlling passing light on railway - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: device contains track circuits with track relays, an information input unit, a signal relay and a test enable relay, where the contacts of the signalling relays of adjacent block sections are connected to each other and to the traffic light bulbs, and the test inclusion switch contacts are connected to the control circuits of the signal generators of rail circuits of the block-section, a logic device with an element of free and occupied state of the rail circuits of the block-section common to the block-section and a slow-acting repeater element of the common circuit of a leaky relay. Moreover, the triggering device of the counter is installed in the logic device, each of these triggers is connected to the rear contact of the track relay of its section and the front contact of the track relay of the next along the train section, including the track circuits of the previous and the subsequent block sections. In addition, triggers of the test check, including the signalling relay, the closure of the path section and the fixation of the passage of testing.

EFFECT: increase in train movement safety.

3 dwg

Description

The invention relates to systems for controlling the movement of trains in railway transport, in particular to systems for interval regulation of the movement of trains on stages.

There is a method of interval regulation of the movement of trains on the hauls (see RF patent No. 2406635, IPC B61L 23/16, Method for controlling the freedom of a rail line included in the dependence of a traffic light) with traffic lights through. This method consists in the fact that when a train is being traversed along a block section of a stage, a sequential check of the operation of the rail chains, the absence of their false free (busy) when disconnecting and connecting the power supply of the rail lines (in normal mode), the correct operation of the rail chain in normal and in shunt mode, after which the enabling indication of the traffic light is switched on.

A device that implements this method consists of two interconnected linear wires of half-sets of equipment, each of which is designed for interval control of train traffic on half of the stretch adjacent to the station at which this half-set is installed. Half-sets consist of separate control devices for each passing traffic light of its half of the drive and control of the state of the rail circuits, which is part of the dependence of this traffic light. At the same time, the correct operation of the control device for each passing traffic light is controlled only when the train follows sections of the rail line that are part of the dependence of the traffic light. This is permissible, since the devices are built on electromagnetic relays of a special design, eliminating the occurrence of uncontrolled failures in them. When building a control device for the traffic light on electronic elements, uncontrolled failures may occur, which is a drawback of the considered method.

There is also a device for the interval regulation of train traffic on a stage built on a microprocessor-based elemental base (see the textbook "Systems of Railway Automation, Telemechanics and Communications", 2012, part 1, p. 87). This device consists of two sets of equipment, each of which is located on the station adjacent to this half of the stage. Each set of equipment contains two identical microprocessor-based information processing channels operating synchronously. The control of their correct operation is carried out by comparing the signals at the corresponding control points of the channels and allowing the issuance of a control command if they coincide or prohibit the issuance of this command otherwise. At the same time, each half-set controls all traffic lights passing half of the stage for which it is intended.

The disadvantage of this device is that its construction on the basis of a microprocessor-based elemental base makes it possible to influence external unauthorized influences on the process of its functioning, as well as the appearance of unacceptable events related to information influences or “cyber attacks”. In addition, in this device, when following a train over a section, a sequential check of the operation of traffic light control devices is not carried out, which reduces the operational reliability and safety of the device. Failure of devices of the microprocessor information processing channel leads to a failure of the interval control device for the entire stage, and not just for one traffic light, which also reduces the reliability of the process of interval regulation of train traffic on the stage.

Closest to the claimed device in the maximum number of similar features is the first of these known devices, which is selected as a prototype.

The disadvantage of this device is that when it is used in a system based on microelectronic logic elements, a separate control of the correct operation of each functional module and verification of the value of each of its output signal are required. In addition, at times when some functions are not performed by a separate module, for example, with a long absence of trains in a section, it becomes possible to have an uncontrolled state of this module, which can be dangerous for a process controlled by the system. The identification of such states requires the use of special control means external to the module, which reduces the efficiency of the entire device, its speed, and increases the cost of its design and implementation.

The aim of the invention is to increase the reliability and safety of the operation of the control device through the traffic light on the railway line, eliminating the possibility of occurrence of dangerous conditions for the movement of trains, as well as the appearance of unacceptable events associated with informational influences or "cyberattacks" on the device’s equipment.

This goal is achieved by the fact that the control device for the traffic light on the stage is based on electronic elements that represent the implementation of the logical functions of the known device, and each relay of the known circuit is replaced by a trigger that has two inputs: S and R (set and reset), and two outputs: direct and inverse, the signals on which correspond to signals on the front or rear contacts of the relay when it is on or off. In the input circuits of these triggers, logical elements are installed on which the logical functions of each of these triggers are implemented.

The invention is illustrated by drawings, which show the following diagrams of the device:

FIG. 1 is a functional diagram of trip relay trip counters;

FIG. 2 is a schematic diagram of the inclusion of the triggers of these counters;

FIG. 3 is a schematic diagram of the inclusion of triggers for controlling the signal indication of a passing traffic light and testing the operation of rail circuits.

The device contains n counters (see Fig. 1), and the number n is equal to the number of rail circuits within the block area (usually it can be from 3 to 6), denoted by Сч1, Сч2, ..., Сн, as well as the initial counter Нсч, which fixes the presence of the train on the rail circuit of the previous block section - the circuit of the track relay P (n-1) and the closure of the previous block section of the RF (n-1) adjacent to the first rail chain of this block section. The rear contacts of the corresponding track relays P1, P2, ..., Pn are connected to the input of each counter Сч1, Сч2, Сн, which record the occupation of the corresponding rail circuit by the rolling stock, as well as the front contacts of the track relay of the next rail circuit along the train. The contacts of the trip relays P1, P2, Pn are connected through the information input unit, which provides signal coordination and protection against contact bounce. Thus, in the counter scheme, the successive occupation of the rail chains of each block section is checked when the train is moving. The meter circuits are connected in series with each other to check the on state of the previous and off states of the subsequent counter, which ensures that the trip relays are activated correctly when the train tracks the corresponding rail circuits of the block section. All front contacts of the track relays are, in addition, combined using the logical conjunction element I (shown by &) on the output of which a signal P is generated corresponding to the free state of all rail circuits of the block section, and its repeater is an MP signal having turn-off delay τ (see Fig. 1). Similarly, all the rear contacts of the track relays are connected by the AND gate with the output signal P ~ corresponding to the busy state of all rail circuits of the block section (all track relays are without current).

The output circuits of each counter Sch1, Sch2, Schn form control points, the signals at which are used to check the correct operation of the counters in the comparison circuit (not shown in Fig. 1). In addition to the listed input circuits, a circuit for fixing the absence of a short circuit of this block section of the RF circuit is connected to the circuit of the NSC counter.

The outputs of the first counter MF (n + 1) and the closure of the next block of the traffic block ZP (n + 1) connected to the inputs of the last counter Сн are connected to the input of the train. In addition, the last Сн counter has two output signals: direct Сн and inverse Сн ~, the signals on which correspond to its on and off state.

The counter circuit (see Fig. 2) contains RS-triggers НСч, Сч1, Сч2, Счn, to the R and S inputs of which the logic elements AND are connected in the following order.

Signals П (n-1) and ЗП (n-1), as well as signal П1 and the inverted output of the counter Сч1, are connected through the inverters to the element And connected to the input S of the NSC trigger. To the element And connected to the input R of the trigger NSC, directly connected are the RF signals (n-1), RF and the direct output of the counter Сч1. The direct output of the NSC trigger through an OR gate is connected to the AND elements of all the triggers of the counters Сч1 - Сн, the signal of closing of this block section is supplied to the second input of the OR element through an inverter.

To the element And, connected to the input S of the trigger Сч1, signals from the path relays П1 ~ and П2 and the inverted output of the counter Сч2 are connected. To the element And connected to the input R of the trigger SCH1, a direct output of the counter SCCH2 is connected.

In a similar way, the inputs S and R of all counter triggers are turned on. At the input S of the last trigger Счn, in addition, signals are sent from the first counter of the next block section of the station Сч1 (n-1) and its short circuit ЗП (n + 1).

The circuit for triggering the triggers for controlling the signal signal of the passing traffic light and for testing the operation of the rail circuits (see Fig. 3) contains triggers for activating the TP test relay, activating the signal relay Zh, generating the signal ZP, and the trigger for fixing the passage of control K. Relay coils TP and Zh are connected to direct the outputs of the corresponding triggers through the amplifying elements, and the relay W, in addition, through the delay element τ.

To the input S of the trigger TP through the element And the MP circuit is connected with a delay on shutdown and inverse output of the trigger K, which fixes the absence of testing. The direct output of the trigger K is connected to the input R of the trigger ТП, as well as to the logic elements at the S and R inputs of the trigger Ж and at the input S of the trigger ЗП. To the input S of the trigger K through the logic element And the direct output of the trigger TP is connected, the inputs of the signals P ~ and MP (through the inverter), and the input R is the inverse output of the trigger J.

To the input S of the trigger Ж through the logic element And the signal circuits П, the inverse output of the trigger ТП, the direct output of the trigger К, the direct output of the trigger ЗП and the signal circuit Счn ~ are connected, and the signal circuit П ~ is connected to the input R of the trigger Ж through the logic element And, direct outputs of the triggers TP and K, inverse output of the trigger ZP.

The OR gate is connected to the input S of the trigger ЗП, to the first input of which the MP circuit is connected via the AND gate, the direct output of the K trigger and the Сн output of the last counter trigger, and the MP and VK circuits are connected to the second input of the OR logic gate (chain of the auxiliary button for removing circuit block closure). To the input R of this trigger, through the logical element AND, the circuits П ~ are connected (the closure of all rear contacts of the track relays) and through the inverter is the ЗП circuit (n-1), the direct output of the ЗП trigger forms an ЗП circuit connected to the counter circuit (see Fig. 1 and 2).

The device operates as follows.

In the initial state, if there are no train relays P1, P2, ..., Pn in the train section, they are under current (their front contacts are closed), fixing the free state of all rail circuits of the block section enclosed by this traffic light. In this case, active logical 1 signals are output at the outputs P1, P2, ..., Pn, as well as at the outputs P and MP, and the outputs of the triggers of the counters Сч1, Сч2, ..., Сн are in a passive state, i.e. give signals of logical "0" (output Сн ~ - logical "1"). In this state, the triggers K and TP are in the initial state, and the trigger Zh is in the on state and the signal relay Zh is under current, including an allowable indication at the traffic light.

When a train enters a track section in front of a given traffic light (last rail circuit of the previous block section), the track relay of this section P (n-1) and its closing trigger ZP (n-1) are turned off, as a result of which the initial counter trigger is triggered through inverters NSCh. In this case, the free state of the first rail circuit of the given block section (signal P1) and the initial state of the first trigger of the counter of this block section (inverted output of the SCh1 trigger) are checked. When the NSC trigger is triggered, the operation circuits for the remaining triggers of the counter of this block section are prepared (via the OR logic element connected to the output of the NSC trigger).

When the first rail circuit of this block section is occupied by the train, the trip relay P1 is turned off and its signal P1 ~ triggers the first trigger of the counter Сч1 with a logical check of the free state of the next rail circuit along the train (signal П2), the state of the initial counter NSC and the state of the next trigger counter Sch2. When the trigger Sch1 is triggered through the AND gate, the NSch trigger is turned off (that is, it returns to its initial state), and the closed state of the previous and given block sections is checked (RF and RF signals (n-1). It is saved by supplying a logic element OR at the output of the NSC trigger with a closure signal of the block part of the RF through an inverter.

In a similar way, all the triggers of the counter Сч2, ..., Сн are triggered sequentially as the train moves along the block section and occupies the rail chains. At the same time, in the operation circuits of each counter trigger, the on state of the previous and off states of the subsequent counter trigger are checked. In the response circuit of the last trigger of the counter, the free state of the rail circuits of the next block section along the train is checked by the closing signal ЗП (n + 1) and the output signal of the first counter of the next block section Сч1 (n + 1).

When the train enters the first rail circuit of this block section and turns off the track relay P1 at the outputs P of the logic element And connected through the information input unit to the front contacts of the track relays, a logic zero signal appears, the same signal appears at the MP output. The MP output has a turn-off delay time using the element τ, i.e. the logical unit signal at the output of this element will appear in time τ after the train releases all the rail circuits of this block section, all the trip relays P1, P2, ..., Pn are activated and the logical unit signal at the output P is turned on, which simulates the deceleration of the fall of the track relay.

After that, the ZP trigger is turned off, closing the block section, and the signal from its inverse output is the Zh trigger, which turns off the signal relay Zh, the contacts of which turn on the inhibitory indication at the traffic light passing through the block section.

As the train moves, the counter triggers are turned off: the initial NSC trigger of the counter with a signal at its input R from the logical element And, at the input of which the conditions for closing the previous block section of the RF (n-1), closing of this block section of the RF and switching on the first trigger Sch1 counter; the first trigger SCh1 of the counter - provided that the next trigger SCh2 of the counter is triggered, etc. The last trigger Сн of the counter can only work if all previous counters have been switched on and off sequentially. The signal from the direct output of the last trigger of the Счn counter is involved in the switch-off circuit of the SC closing trigger, and the signal from the inverse output is included in the switching circuit of the signal trigger Ж, and therefore the signal relay J.

After the block section is completely released, the P signal and the MP signal are turned on (with time delay τ) through the And element, the TP trigger is turned on and relay T is activated. In this case, the contacts of this relay turn off the generators of all rail circuits of the block section, their track relays P1, P2 , ..., PN de-energize, closing their rear contacts. Under this condition, through the logical element And, the circuit P ~ is turned on, and the circuits P and Mn are turned off. This state is fixed by trigger K, which fires and switches off the TP trigger and prepares the inclusion of triggers Zh and ZP.

After switching off the TP trigger, relay T is de-energized and turns on the power of the track generators of all the rail circuits of the block section. As a result of this, their trip relays are switched on and P and MP circuits are formed. After that, provided that the block section is free (signal P is available), the TP trigger is turned off (the signal from its inverse output), trigger K has fixed all trip relays off and on (the signal from its direct output), the last trigger of the Счn ~ counter is off and the circuit block closure is removed (the trigger trigger is enabled), trigger Zh is turned on, then, with a time delay, relay Zh is triggered, including an allowable indication at the traffic light.

Thus, when following a train in a device, the sequence of switching on and off the track relays, the absence of their extraneous recharge, and the correct operation of the signal circuit of the device are checked.

To ensure the safe operation of the device, a known method of duplicating the equipment of the device (with its synchronous operation) and safe comparison of signals between themselves at the main (control) points of the device circuit can be used. Such control points are the outputs of the triggers of the counters НСч, Сч1, Сч2, ..., Сн, the control trigger for turning on the test checks TP, the trigger for fixing the shutdown of the trip relays during testing K, the signal trigger Zh and the trigger for closing the block section of the ЗП. With a positive result of this comparison, it is possible to output signals to the relay by supplying the corresponding signal to the amplifying elements of the relay Zh and T. When the sets of equipment are out of sync (this can happen in case of failure or failure in one of the sets), this event is recorded by means of safe monitoring, and then it is carried out restarting the device when it fails) or replacing elements (in case of failure). To ensure safety in the event of accidental exposure to the device, it is possible to reset it (bring it to its initial state) using the VK button, the signal from which sets the trigger of the RF to its initial state.

The proposed device provides all the functions of the control device through the traffic light, while ensuring the safety of the devices, the correct sequence of their work, the absence of influence on the operation of the device recharge rail circuits and their shutdowns. In addition, this device excludes the influence of information interference in its functioning of any nature, it is protected from possible cyber attacks.

Claims (1)

A device for controlling a passing traffic light on a railway leg, containing rail circuits with track relays on the block section enclosed by this traffic light, the contacts of which are connected through a data input unit to a logic device, the outputs of which are connected to a signal relay and a test enable relay, and signal contacts relays of adjacent block sections are interconnected and with traffic light lamps so that red, yellow or green lights can turn on at this traffic light I, depending on the state of these block sections, and the contacts of the test enable relay are included in the control circuits of the signal generators of the rail circuits of the block section, in addition, the logic device of this pass-through traffic light is connected to similar logical devices of the neighboring ones - the previous and subsequent pass-through trains traffic lights, as well as in it there are elements of the free and busy state of the blockchain rail circuits common for the block section and a slow-acting element - a repeater of the general track le, characterized in that the counter triggers are installed in the logic device, and each of these counter triggers is connected to the rear contact of the track relay of its section and the front contact of the track relay of the next section along the train, including the rail chains of the previous and subsequent block sections, in addition , in the device added triggers for test testing, switching on the alarm relay, closing a path section and fixing the test, and the first input of the test test trigger is connected via the And element the output of the slow-acting repeater of the general trip relay and with the inverse output of the test-run trigger, the second input of the test-run trigger is connected to the main output of the test-run trigger, which also connects the inputs of the logic elements for signal and circuit triggers, the main output of the test-test trigger is connected to logic elements at the first inputs of the trigger for fixing the passage of testing and the second inputs of triggers for signal and circuit, and the inverse output test test trigger - to the logic element at the first input of the signal trigger, the first input of the trigger for fixing the test passing through the logical element And is connected, in addition, to the output of the busy state of the rail circuits and, through the inverter, to a slow-acting repeater of the common track relay, and the second input of this trigger - with the inverse output of the signal trigger, the first input of which is connected through a logic element, in addition, with the output of the free state of the rail circuits of the block section, with the inverse output of ice trigger of the counter and with direct output of the trigger of the closure, the second input of the signal trigger through its logic element is connected to the output of the occupied state of the rail circuits and to the inverse output of the closure trigger, and the first input of the trigger of the closure through the OR element is connected through the AND element to the contacts of the auxiliary switch and slow-acting repeater of the common track relay and through the second element And - with a direct output of the last trigger of the counter and slow-repeater of the general track relay, and w The swarm input of the closure trigger through the And element is connected to the output of the busy state of the rail circuits and, through the inverter, to the closure trigger of the block section that was previous during the train, while the direct output of the closure trigger is connected to the counter trigger circuit, and the inverse output is connected to the And element on the second input of the signal trigger, in addition, the outputs of the triggers of the signal and test check through the amplifiers are connected to the windings of the corresponding relays - signal and test check.

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