CN211860101U - Frequency shift relay device for wireless shunting locomotive signal and monitoring system - Google Patents

The utility model relates to a frequency shift relay device for wireless shunting cab signal and monitored control system, the device install between ground communication building basic station and controlled train, frequency shift relay device including mutual near-end host computer and the distal end extension through intermediate frequency signal communication connection, the near-end host computer establish in ground communication building basic station department and with ground communication building basic station communication connection, the distal end extension establish at communication building basic station cover edge and with controlled train communication connection. Compared with the prior art, the utility model has the advantages of reinforcing wireless communication transmission ability enlarges wireless communication's coverage.

Frequency shift relay device for wireless shunting locomotive signal and monitoring system

Technical Field

The utility model relates to a wireless shunting cab signal and monitored control system especially relate to a relay dress of shifting frequency that is used for wireless shunting cab signal and monitored control system.

Background

A wireless shunting locomotive signal and monitoring system (STP system for short) is a set of shunting safety protection system applied to stations and mainly comprises ground equipment and vehicle-mounted equipment. The STP system realizes communication between ground equipment and vehicle-mounted equipment through a wireless data transmission radio station, and realizes wireless monitoring and safety protection for shunting operation of a plurality of locomotives in a station yard. Therefore, the wireless communication quality directly influences the stability, real-time performance and accuracy of data interaction between the ground equipment and the vehicle-mounted equipment.

In the process of building a wireless communication network, due to the complex geographical terrain environment of each station (for example, the area of a station yard is too large, the distances of station entrance signal machines on two sides of the station are far, and a tunnel, a mountain area, a bridge, a barrier and the like exist in the station), a wireless signal cannot completely cover the whole station, so that the stability of communication between ground equipment and vehicle-mounted equipment is directly influenced, and the safety protection of an STP system on the vehicle shunting operation in the station is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect that above-mentioned prior art exists and providing a frequency shift relay device for wireless shunting cab signal and monitored control system, the device is to the wireless communication environment at complicated geographical environment station, utilizes the long, the space of frequency wavelength to decline little, the strong intermediate frequency signal of diffraction ability as transmission signal, and reinforcing wireless communication transmission ability enlarges wireless communication's coverage.

The purpose of the utility model can be realized through the following technical scheme:

a frequency shift relay device for a wireless shunting locomotive signal and monitoring system is arranged between a ground communication building base station and a controlled train and comprises a near-end host machine and a far-end extension machine which are mutually connected through intermediate frequency signal communication, wherein the near-end host machine is arranged at the ground communication building base station and is in communication connection with the ground communication building base station, and the far-end extension machine is arranged at the covered edge of the communication building base station and is in communication connection with the controlled train.

Preferably, the near-end host comprises a coupling circuit, a first frequency conversion circuit, a first amplification circuit and a directional antenna which are connected in sequence, wherein the coupling circuit is in communication connection with the ground communication building base station.

Preferably, the first frequency conversion circuit is a 400MHz to 200MHz frequency conversion circuit.

Preferably, the far-end extension set comprises a donor antenna, a filter circuit, a second frequency conversion circuit, a second amplification circuit and a communication interface which are connected in sequence, wherein the donor antenna is in communication connection with the directional antenna of the near-end host, and the communication interface is in communication connection with the controlled train.

Preferably, the second frequency conversion circuit is a 200MHz to 400MHz frequency conversion circuit.

Preferably, the communication interface is an RS485 serial port.

Preferably, there is one each of the near-end host and the far-end extension.

Preferably, the number of the near-end host machines is one, and the number of the far-end extension machines is multiple.

Preferably, the apparatus further comprises a leaky cable connected between the remote extension and the locomotive under control.

Preferably, the leaky cable adopts a 400MHz frequency leaky cable, and the 400MHz frequency leaky cable is laid in the tunnel.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model adopts the intermediate frequency signal as the transmission signal, the transmission distance is long, and the diffraction performance is good;

2. the near-end host and the STP ground host of the utility model adopt RS485 serial port communication mode for data interaction, and can be flexibly matched with a ground communication base station for use;

3. the utility model discloses a near-end host can be configured with 4 far-end extension sets at most, realizing flexible networking mode and highest cost performance;

4. the utility model adopts wireless intermediate frequency signal transmission between the near-end host and the far-end extension, and does not need to lay optical fiber and other equipment, thereby reducing the number of communication equipment and the operation cost;

5. the utility model discloses the principal equipment is few, and the module integrates the degree height, and spare parts is general, and the reliability is high.

Drawings

Fig. 1 is an architecture diagram of the frequency shift repeater of the present invention;

fig. 2 is a schematic structural view of the near-end host of the present invention;

fig. 3 is a schematic structural diagram of the far-end extension of the present invention;

FIG. 4 is a schematic diagram of the frequency shift relay of the present invention;

fig. 5 is the architecture diagram of the frequency shift relay tunnel scheme of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

The utility model discloses set up near-end equipment near-end host computer at ground communication building basic station, cover the edge at communication building basic station and set up the distal end extension. One near-end host computer must be configured at the same station, and one or more remote extensions can be configured to respectively realize a one-to-one or one-to-many system distribution mode.

The ground communication building base station sends 400MHz frequency signals to a coverage area through the omnidirectional antenna, and the communication frequency between a controlled locomotive and the base station in the coverage area of the base station is 400 MHz. The near-end host computer couples a small part of communication energy from the base station, shifts frequency to 200MHz (intermediate frequency signal) frequency signals, amplifies the signals, and sends the signals to the far-end extension set through the directional antenna. The donor antenna of the far-end extension set receives 200MHz frequency signals in the air, the far-end extension set filters and converts the received signals to 400MHz frequency signals, the signals are transmitted to the controlled locomotive through the 400MHz frequency directional transmitting antenna, and the communication frequency between the controlled locomotive and the ground communication building base station in the coverage area of the far-end extension set directional transmitting antenna is still 400 MHz.

The downlink direction is as follows: the near-end host computer is coupled with a small part of communication energy from the base station, is modulated to a frequency signal of 200MHz (intermediate frequency signal) through frequency conversion and amplification processing, and is sent to a far-end extension set by a directional antenna. A donor antenna of the terminal extension receives an aerial 200MHz frequency signal, and after filtering, frequency conversion and amplification processing, the donor antenna sends a 400MHz frequency signal to a controlled locomotive through a directional forwarding antenna.

An uplink direction: the far-end extension receives 400MHz frequency radio station signals from a controlled locomotive in an extension area, and the signals are transmitted to the near-end host through a 200MHz directional antenna after being filtered, frequency-converted and amplified. The donor antenna of the near-end host receives the air 200MHz frequency signal, after filtering, frequency conversion and amplification processing, the donor antenna is restored to 400MHz frequency radio station signal of the controlled locomotive, and the signal is transmitted to the ground host of the STP system in the form of RS485 serial port, thus completing the link connection of the whole wireless communication.

The utility model discloses intermediate frequency signal only is used for communicating between near-end machine and the distal end machine, does not influence and is monitored communication between locomotive and the ground communication building basic station. The scheme consists of a near-end host and a far-end extension, can be flexibly matched with a ground communication base station for use, and the number of channels can be allocated according to the actual needs of a station site. Meanwhile, the near-end host and the far-end extension can be configured in a one-to-one or one-to-many mode, so that the coverage efficiency is high, and the effect is obvious.

Fig. 4 is a schematic diagram of a frequency shift relay scheme, in which a ground communication building base station transmits 400MHz frequency signals to a coverage area, a near-end host couples a small part of communication energy from the base station, and the frequency signals are shifted to 200MHz (intermediate frequency signals) and then transmitted to a far-end extension after amplification processing. The donor antenna of the far-end extension set receives the aerial 200MHz frequency signal, and the far-end extension set restores the received signal to 400MHz frequency signal after filtering, frequency conversion and amplification, and sends the signal to the controlled locomotive in the extension area.

For the natural environment and the wireless environment with tunnels in a station, due to the special influence of the tunnels on signals, if a common directional antenna is adopted for covering, the propagation direction of the signals is consistent with the extension direction of the tunnels, the wireless signals are attenuated greatly when propagating in the tunnels, and if the tunnel bending degree is large or the length is long, the coverage area of the directional antenna cannot completely cover the whole tunnels. Therefore, the use of directional antenna coverage in the tunnel still does not solve the fast fading problem of the signal well,

fig. 5 is an architecture diagram of a frequency shift relay tunnel scheme, and wireless communication coverage is completed by adopting a networking mode of 'a near-end host, a far-end extension and a leaky cable' aiming at scene characteristics and coverage difficulties of a railway tunnel in a mountain area; the leakage cable has a good signal transmission function, and the coverage problem of the tunnel can be well solved by adopting a leakage cable coverage mode in the tunnel.

The ground communication base station and the controlled locomotive in the wireless communication coverage range exchange data at 400MHz frequency, the near-end host couples a small part of communication energy from the base station, shifts the frequency to 200MHz (intermediate frequency signal) frequency signals, amplifies the signals, and transmits the amplified signals to the far-end extension sets at both sides of the station by the omnidirectional antenna. Donor antennas of far-end extension sets on two sides of a station receive 200MHz frequency signals in the air, the far-end extension sets filter and convert the received signals to 400MHz frequency signals, and the signals are sent to a controlled locomotive in a tunnel through 400MHz frequency leakage cables laid in the tunnel, so that wireless data interaction between the controlled locomotive and a ground communication base station is realized.

The utility model discloses having used widely in STP-KA type wireless shunting locomotive signal and monitored control system, can not only solving because the great wireless communication problem in station, can also solve the signal coverage problem that there are stations such as tunnel, bridge, barrier in the station, solved the wireless communication problem in complicated geographical environment station to a great extent, reduced the cost consumption of each side, guaranteed the stability and the security of train ground communication, obtained user's unanimous good comment. The scheme is beneficial to popularization and use of the STP-KA type wireless shunting locomotive signal and monitoring system, and has good implementability and economic benefit.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.