RU2598112C1 - Moving device for alerting mobile crews on rolling stock entering guard section - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to railway ACS and telemetry systems for alerting track workers. Device contains a stationary transmitting and a receiving devices, antennae of which are connected with a wire. Transmitting device comprises a unit for generating signals, a master oscillator, a power supply source and a power amplifier connected to the antenna and a loop having electromagnetic communication with the rail. Receiving device comprises an analog processing module, a digital processing module, a heterodyne, a power supply source and a radio-frequency module connected to the antenna and a loop having electromagnetic connection with the rail. Herewith the receiving device is installed on a travelling along the tracks vehicle of the mobile crew, it receives simultaneously a "straight" signal of the transmitting device, a signal reflected from the rolling stock and a data signal, the transmitting device with collars and clamps is operatively mounted for the time of the works, and the data source used are track sensors.

EFFECT: provided is higher safety of personnel working at the tracks.

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Description

The invention relates to transport systems, in particular to systems of railway automation and telemechanics with fully automatic control and, more particularly, to devices for determining the current location of rolling stock.

The well-known "Method for diagnosing rail track and rolling stock", RF patent No. 2487809, based on the radar principle using surface electromagnetic waves, which implements a device containing:

- Adjustable electric pulse generator of a special form;

- a switch that provides alternate transmission of pulses to each transceiver antenna;

- a synchronizer for opening the input of the amplifier of the receiver for a certain time interval corresponding to the time of arrival of the reflected signal;

- a memory unit for introducing and storing parameters of the reflected pulses corresponding to the normal state of the track and the normal state of the cars.

The device also includes a power supply unit that provides operation from standard on-board power sources, and an on-board computer that processes the received information.

The disadvantage of this method and device is the use of a pulsed radar method, which requires a carrier frequency of about 300 MHz. For signals of such frequencies, the rail track is a waveguide with numerous inhomogeneities formed by fastening the rail to the sleepers, the sleepers themselves and the joints that scatter the surface wave signal. In addition, the parameters of the rail, as a waveguide, strongly depend on the underlying surface, which limits the application of this method to determine the location of the rolling stock and reduces its effectiveness. The use of signals of lower frequencies does not allow to achieve the declared results.

The well-known "System for transmitting information to pedestrian crossings and level crossings about the approximation of rolling stock", utility model patent No. 137533 of 06/28/2013, containing:

- a signal generator, the input of which is connected to one of the outputs of the control and communication module, and one of the outputs of the signal generator is connected to the input of the antenna switch, the input / output of which is connected to the input / output of the antenna system;

- a power module, the output of which is connected to one of the inputs of the control and communication module;

- the receiving and transmitting modules, the input and output of the transmitting module are connected respectively to one of the outputs of the signal generator and one of the inputs of the antenna switch, the output of which is connected to one of the inputs of the receiving module, the input and output of which are connected respectively to one of the outputs of the generator and the input of the module analog signal processing, the output of which is connected to one of the inputs of the control and communication module;

- an analog processing module, the output of which is connected to the second input of the control and communication module.

The signal generator is configured to provide direct digital frequency synthesis and phase manipulation, and the antenna system is installed with the ability to interact with the wires of the contact network.

The system implements a radar method for determining the distance to the rolling stock, in which the signal propagates in the waveguide formed by the rail and the wire of the contact network, and is reflected from the rolling stock.

The disadvantage of this method is the decrease in the accuracy and reliability of determining the location of the rolling stock when installing the system near the station with a large number of branching paths and contact network, which leads to numerous signal reflections.

Another disadvantage of this method is the lack of reliability for registering rolling stock for use at a railway crossing due to the use of only one physical principle for determining the distance to rolling stock - registration and analysis of the characteristics of the reflected signal.

Additionally, the placement of the specified device on the infrastructure of the railways requires a cycle of construction, installation and commissioning.

A device that implements the above method for determining the distance to the rolling stock is the closest in technical essence to the claimed device, and therefore is selected as a prototype.

The technical task to be solved is the creation of a notification device for mobile teams about the entry of rolling stock to the fence section, individual elements of which are located on the vehicle being moved during the work, while others are quickly located on the infrastructure, at the borders of the fence section.

The device allows its use both on stages and at stations, providing increased reliability of detection of rolling stock.

Achievable technical result is to increase the level of safety of personnel working on the tracks.

The technical result is achieved as follows.

The receiving device, the antenna of which is placed in the plane formed by the rail and the contact wire (or the wire of the DPR, or the waveguide of the train radio communication), is mounted on a mobile team moving along the tracks.

The receiving device is configured to simultaneously receive a “direct” signal of the transmitting device, a signal reflected from the rolling stock, as well as an information digital signal. The receiving device provides the ability to receive digital signals with amplitude, or frequency, or phase shift keying, which are used to transmit control, diagnostic or other information.

The transmitting device, together with the antenna, is mounted using clamps and clamps near the boundary of the fence section, and is placed on the track infrastructure at a predetermined distance from the contact wire (or the wire of the DPR, or the train radio waveguide).

The transmitting device is configured to generate these digital signals.

As a source of information, traveling sensors (axle counting sensors or active magnetic frames) are used, which are part of the device installed on tracks at the borders of the fence section.

Information is transmitted from the track sensors to the transmitting device using a Zigbee standard wireless channel.

All elements of the receiving and transmitting devices, track sensors are placed in place, installed before the start and dismantled after the completion of work on the tracks.

An electromagnetic wave in a waveguide formed by a rail and a contact wire (or an LPR wire, or a train radio communication waveguide) is formed by a transmitting device whose antenna is connected to the waveguide. The generated electromagnetic wave propagates in two directions.

The signal emitted by the transmitting device, reflected from the rolling stock moving in the direction of the transmitting and receiving devices, is input to the receiving device. A “direct” signal (a signal transmitted from one device to another without reflection) of the transmitting device is also fed to the input of the receiving device.

The difference between the frequencies or phases of the direct and reflected signal determines the distance to the rolling stock.

When the rolling stock approaches a distance shorter than the wavelength, due to strong reflection, an increase in the power of the signal propagating in the direction of the receiving device occurs.

When the mobile signal is followed by the antenna of the transmitting device, the power of the signal propagating in the direction of the receiving device decreases.

These changes in signal power are recorded by the receiving device and are used as a signal to confirm the output of the rolling stock to the controlled section of the fence.

When the rolling stock moves in the area between the transmitting and receiving devices, a periodic change in signal power occurs, associated with a change in the distance between the rolling stock and the antennas of the transmitting and receiving devices in relation to the wavelength. From these changes in signal power, the location of the rolling stock in the controlled area and its speed are determined. When the rolling stock passes the antenna of the receiving device, a confirmation signal of the output of the rolling stock from the controlled area is formed. Further support of the rolling stock is carried out using the reflected signal.

The reliability of determining the location of rolling stock is enhanced through the use of direct and reflected signals.

Improving reliability is achieved through the use of direct and reflected signals in conjunction with the input and output signals to the controlled area and the transmission of control information.

The operation of the system near the stations is ensured by the location of the transmitting device directly in front of the station, while the receiving device can be installed behind the station or in front of the station on the stage, depending on the location of the monitored section of the track.

The drawing shows a functional diagram of the device.

It contains a transmitting device, which includes a signal conditioning unit 1, the output of which is connected to one of the inputs of the master oscillator 3, one of the inputs of which is connected to the first output of the power supply 2, the other output of the power supply 2 is connected to one of the inputs of the power amplifier 4, one from the inputs of which is connected to one of the outputs of the master oscillator 3. One of the outputs of the power amplifier 4 is connected to the antenna 5, and the other to the cable 14, which is electromagnetically connected to the rail 7. One of the outputs of the power source 2 is connected to one of the inputs of the signal conditioning unit 1.

The composition also includes a receiving device that contains a radio frequency module, one of the inputs of which is connected to the antenna 8, and the other is connected to a cable 15, which is electromagnetically connected to the rail 7. The output of the radio frequency module 11 is connected to one of the inputs of the analog signal processing module 13 the output of which is connected to one of the inputs of the digital signal processing module 9. One of the outputs of the digital signal processing module 9 is connected to one of the inputs of the local oscillator 10, the output of which is connected to one of the inputs of the radio frequency module.

The outputs of the power source 12 are connected to one of the inputs of the radio frequency module, one of the inputs of the local oscillator 10, one of the inputs of the digital signal processing module 9, one of the inputs of the analog signal processing module 13.

Antennas 5, 8 are connected to the wire 6.

The path sensor 16 used as an information source is connected to a signal generation unit 1 via a wireless communication channel implemented by the wireless adapters 17 (transmitter) and 18 (receiver).

Elements of the circuit 8-13 and 15 are mounted on a movable vehicle / device 19.

The device operates as follows.

The master oscillator 3, controlled from the probe signal generating unit, generates a probing signal and an information signal, which is amplified by a power amplifier 4 and enters the waveguide formed by a wire 6 and a rail 7 through the antenna 5. A direct signal from a transmitting device, a signal reflected from the rolling stock, and the information signal is fed to the input of the radio frequency module 11 through the antenna 5. The signal from the local oscillator 10, controlled by the digital signal processing module 9, is fed to the second input of the radio frequency module. the output of the radio-frequency module 11 is fed to the input of the analog signal processing module 13, which leads it to the form necessary for the analog-to-digital converter of the digital signal processing module 9 to work. The digital signal processing module 9 provides final processing of the received signal, calculating the location of the rolling stock, generating and issuing control signals to external devices of railway automation and telemechanics. Power supply 2 provides the necessary supply voltages for all modules of the transmitting device. The power source 12 provides the necessary supply voltages for all modules of the receiving device.

When the rolling stock enters the boundary of the fence section, the signal from the track sensor 16 is transmitted via wireless adapters 17 and 18 to the signal generation unit 1.

The received information is transmitted in the above-described way to the signal processing module 9, in which, depending on the previously received information, the fact of joining or leaving the fence section is recognized and when the composition enters the section, an alert is generated.

Claims (1)

A warning device for brigades about the entry of rolling stock to a section of a fence containing a stationary transmitting device, which includes a signal conditioning unit, the input of which is connected to the output of the power source, and the output to one of the inputs of the master oscillator, the other input of which is connected to the output of the power source , the other output of the power source is connected to one of the inputs of the power amplifier, the input of which is connected to the output of the master oscillator, and one of the outputs is connected to the antenna, the other to the loop having electromagnetic connection with the rail, and also contains a receiving device that includes a radio frequency module, one of the inputs of which is connected to the antenna, the other to the cable, having electromagnetic connection with the rail, and the output is connected to the input of the analog signal processing module, which is connected to the module digital signal processing, forming an alert, the output of which is connected to the input of the local oscillator, which is connected to one of the inputs of the radio frequency module, characterized in that the receiving device is mounted on moving along utyam mobile brigade transport means, receives both the "direct" signal transmitting apparatus, the signal reflected from the rolling stock, and information signal sending device with clamps and clamps operatively mounted at the time of work, and in the travel sensors are used as the source.

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