RU2653658C1 - Automatic train control device - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to the field of railway automation, in particular to automatic train control devices. Device includes a and locomotive receiver installed on the locomotive, which output is connected to the decoder first input, which second input is connected to the speed meter, and the decoder outputs are connected to the locomotive color light signal and the electro-pneumatic valve. Wherein the two analog Hall sensors, located above the rails in front of the locomotive front axle, are connected to the locomotive receiver input and are connected in series in such a way, that the useful signal voltages at the receiver input from the sensors output were summed up, and the voltages from the interference were subtracted.

EFFECT: enabling an increase in the automatic train control noise immunity.

1 cl, 1 dwg

Description

FIELD OF THE INVENTION

The invention relates to railway automation, in particular to devices for automatic locomotive signaling.

State of the art

Known automatic locomotive alarms type ALSN, containing installed on the way code track generator connected to the rail circuits mounted on the locomotive receiving coils, locomotive receiver, decoder, speed meter. The decoder is connected to a locomotive traffic light and braking system [A. Leonov Maintenance of automatic locomotive alarms. - 5th ed., Revised. and add. - M .: Transport, 1982. - 255 p.]. Currently, these devices provide forced braking in case of violation of traffic safety conditions, such as exceeding the permissible speed, loss of vigilance of the driver, etc. However, when operating the ALS, there are malfunctions due to interference from the traction current, which can lead to a forced stop of the locomotive. Such interference occurs when switching traction currents and the presence of their asymmetry in the rails.

In this case, the current flowing in the rail line creates a magnetic flux, which, due to the inductive coupling between the rail line and the receiving locomotive coils, induces in the latter EMFs. According to Faraday’s law, this EMF is proportional to the time derivative of the magnetic flux coupled to the coils. Therefore, the receiving coil can be represented as a device that differentiates the received signal and interference. It is known that differentiation of a signal, the main energy of which is contained at the carrier frequency and in the two side components of the spectrum, does not lead to its qualitative change, and differentiation of impulse noise leads to a shift of its spectrum to higher frequencies. This practically leads to the appearance of additional pulsed noise of significant levels in locomotive coils during switching of the traction current and, therefore, to a decrease in the noise immunity of the ALSN operation.

A known system of multi-valued automatic locomotive signaling type ALSEN [Systems of railway automation and telemechanics: Textbook. for universities / Yu.A. Kravtsov, V.L. Nesterov, G.F. Lekuta and others; Ed. Yu.A. Kravtsova. M .: Transport, 1996. 400 pp.], Which also contains receiving locomotive coils, electronic units, indication and switching circuits of the locomotive, speed gauge and vigilance handle. It has the same drawback as ALSN, because differentiation of interference occurs in the receiving coils.

The closest in technical essence to the claimed object is the device described in [Leonov A.A. Maintenance of automatic locomotive alarms. - 5th ed., Revised. and add. - M .: Transport, 1982. - 255 p.]. It is taken as a prototype.

The prototype device contains two receiving coils mounted on the locomotive connected to the input of the locomotive receiver, the output of which is connected to one input of the decoder, the second input of which is connected respectively to the speed meter, and the outputs of the decoder are connected to the locomotive traffic light and electro-pneumatic valve.

Disclosure of invention

The technical result to which this invention is directed is to increase the noise immunity of automatic locomotive signaling by introducing inductive communication into the channel when transmitting signals from the path to the locomotive instead of the receiving coils of Hall sensors.

The essence of the invention lies in the fact that in the known locomotive automatic locomotive signaling device having two receiving coils mounted on the locomotive connected to the input of the locomotive receiver, the output of which is connected to one input of the decoder, the second input of which is connected respectively to the speed meter, and the outputs of the decoder are connected to the locomotive traffic light and electro-pneumatic valve, instead of two receiving coils, two Hall sensors are installed.

Brief Description of the Drawings

The invention is illustrated by the Figure, which shows a device for automatic locomotive signaling.

The implementation of the invention

The figure indicates:

1 and 2 - the first and second Hall sensors;

3 - locomotive receiver;

4 - decoder;

5 - speed meter;

6 - electro-pneumatic valve;

7 - locomotive traffic light.

The automatic locomotive alarm device contains Hall sensors 1 and 2 mounted on the locomotive and connected to the locomotive receiver 3. The output of the decoder is connected to one input of the decoder 4, the second input of the decoder 4 is connected to the speed meter 5. The outputs of the decoder are connected to the electro-pneumatic valve 6 and to the locomotive traffic light 7.

The automatic locomotive alarm device operates as follows. On a locomotive, Hall sensors 1 and 2 receive ALSN code signals from currents in rail threads due to changes in the magnetic field strength during transmission of pulses. If the suspension height of the Hall sensors is the same, then the same ALSN signals are induced in both, as well as the same interference signals from the traction current. The sensors are connected in such a way that the useful signal is added, and the interference signal is subtracted and equal to zero (as in the prototype with two coils). In this case, the differentiation of the signal and the interference does not occur and the spectrum of the pulse interference does not change, and therefore this technical solution avoids the occurrence of additional interference in the presence of locomotive coils.

The work of the remaining nodes of the model occurs in the normal mode of operation of the ALSN. That is, from Hall sensors 1 and 2, the signal is fed to the input of the locomotive receiver 3, from the output of which the amplified signal goes to the decoder 4, which controls the lights of the locomotive traffic light 7. In case of exceeding the speed allowed by the code signal, a command is issued from the decoder 4 to the electro-pneumatic valve 6 and the train stops.

Claims (1)

A device for automatic locomotive signaling using Hall sensors, eliminating the occurrence of high-frequency harmonics at the input of the locomotive receiver when differentiating impulse noise in the existing inductive coupling between the rail and the receiving coil, containing a locomotive receiver installed on the locomotive, the output of which is connected to the first input of the decoder, the second input of which is connected to the speed meter, and the decoder outputs are connected to a locomotive traffic light and an electro-pneumatic valve y, characterized in that the locomotive has two analog Hall sensors located above the rails in front of the front axle of the locomotive, which are connected to the input of the locomotive receiver and connected in series so that the voltage at the input of the receiver from the useful signal at the output of the sensors are summed, and the voltage from interference - deducted.

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