CN102632912A - Anti-collision early-warning system and method for subway trains - Google Patents

Abstract

The invention relates to an anti-collision early-warning system for subway trains, which comprises an overhead contact system and a vehicle-mounted device, wherein the overhead contact system is erected along a train track, and a graded insulation part of the overhead contact system is provided with a neutral-section passing device; and the vehicle-mounted device is arranged on a train and comprises a coupling module, a signal processing module and an early-warning display module which are sequentially connected, wherein the coupling module and the overhead contact system are coupled so as to acquire or send carrier signals, and the signal processing module and the early-warning display module are both connected with a traffic safety device. The method comprises a sending process and an acquisition process which are synchronously performed, and the real-time traffic information is obtained through sending and acquiring information in the overhead contact system by using carrier signals. Compared with the prior art, the system and method disclosed by the invention can realize two-way communication, and are not easy to be disturbed; and the communication coverage distance is far larger than that of the existing wireless communication system.

Description

Subway train anti-collision early warning system and method

Technical field

The present invention relates to city rail traffic signal system, especially relate to a kind of subway train anti-collision early warning system and method.

Background technology

City rail traffic signal system is to guarantee train operating safety, realizes train traffic control and train operation modernization, improves the critical system equipment of conveying efficiency.

City rail traffic signal system is made up of train automatic controlling system (Automatic Train Control is called for short ATC) usually, and the ATC system comprises three sub-systems:

Train automatic monitoring system (Automatic Train Supervision is called for short ATS),

Train automatic protection subsystem (Automatic Train Protection is called for short ATP),

Automatic train operation system (Automatic Train Operation is called for short ATO).

Three sub-systems constitute closed loop system through information exchange network; Realize that control combines on Ground Control and the car, terrain is controlled and combined with centring control; Constituting one is the basis with the safety apparatus, and functions such as collection train traffic control, operation adjustment and train driving automation are the train automatic controlling system of one.

The ATC system of movable block mode adopts medium such as radio communication, ground cross-inductive loop wire, waveguide usually, carries equipment to the row car controlling and transmits information.The train safe spacing distance is to allow information calculations such as the speed of a motor vehicle, current point station position, circuit to draw according to maximum, and information is recycled renewal, uninterruptedly receives instant messages to guarantee train.

Movable block ATC system is the bidirectional data communication equipment that utilizes between train and ground, makes trackside signal facility can obtain each train continuous position information, and calculates the operation authority of each train apart from this; Dynamically update and send to train; Train calculates the velocity curve of train operation according to operation authority that receives and the running state of self, realizes accurate stopping a train at a target point; Realize the train way traffic pattern of protection fully, more help giving full play to of road.

The signalling methods that the current track field of traffic adopts mainly contains: track circuit, induction loop line, inquiry response device, wireless telecommunications.Former three is mainly used in ground and passes on a spot of data message to train, and wireless telecommunications are mainly used in the voice-and-data intercommunication between train and the ground.These several kinds of modes are except all needing special Infrastructure, and first three is merely the one-way communication of ground to car, and can't accomplish the information interaction between train and the train.Though wireless telecommunications can realize train and ground-surface two-way information interaction, the communication between train and the train is through ground forwarding, has increased time delay and uncertainty that information transmits.In addition, just there is the shortcoming that is subject to disturb in radio communication itself, and especially the subway communication system is disturbed more seriously, causes reliability decrease.At present, train needs cooperating of ground system equipment with data interaction between the train, and this just also proposes very high requirement to the ground system equipment dependability.The bidirectional data interaction of existing ATC system mainly relies on the mode of wireless telecommunications to accomplish, and does not provide the immediate data between train and the train mutual.

Contact system refers to electrified railway and urban track traffic contact system; Be electrified track traffic peculiar, set up along rail, for electric locomotive or battery-driven car group provide the special supply line of electric energy, be the important component part of electrified track traffic tractive power supply system.Contact system is a power transmission line, and it has all characteristics that power transmission line has.Contact system also is a natural carrier communication passage except giving train power supply.Utilize contact system and carrier communication just can realize beidirectional data communication between train and the train.Utilize the mode of contact system carrier communication, need not increase how many infrastructure investments and just can realize beidirectional data communication between train and the train, and frequency spectrum resource is loose, receive extraneous interference less relatively.

Summary of the invention

The object of the invention is exactly for the defective that overcomes above-mentioned prior art existence a kind of subway train anti-collision early warning system and method that combines contact system and carrier communication to be provided; The communication of this system and method can realize two way communication, and is difficult for being interfered.

The object of the invention can be realized through following technical scheme:

A kind of subway train anti-collision early warning system, this system is connected with the traffic safety device of train, comprising:

Contact system sets up along train rail, and the graded insulation place of described contact system is provided with passing phase insulator device;

Mobile unit; Be provided with ON TRAINS; Comprise bonded assembly coupling module, signal processing module and early warning display module successively, described coupling module and contact system coupling are gathered or are sent carrier signal, and described signal processing module all is connected with the traffic safety device with the early warning display module.

Described coupling module comprises two couplers at least, when train is advanced, exists a coupler not to be positioned at the graded insulation place of contact system at least.

Described coupler has two, lays respectively at the front and rear of train.

Described signal processing module comprises bonded assembly filtering power amplifier unit, D/A conversion unit, digital frequency conversion filter unit, Base-Band Processing and communications protocol unit and string and converting unit successively; Described filtering power amplifier unit connects coupling module, connects in twos respectively through cooresponding data-interface between described string and converting unit, early warning display module and the traffic safety device.

A kind of subway train anti-collision early warning method that adopts said system comprises the process of transmitting of this train travel information and the receiving course of other train travel information, and described process of transmitting and receiving course carry out synchronously, wherein

Process of transmitting is:

A1) the traffic safety device of train is sent to early warning display module and signal processing module respectively with the running information of this train;

A2) the early warning display module shows the running information of this train, and signal processing module is handled the running information of this train, generates the carrier signal that comprises running information;

A3) coupling module is sent to contact system with the carrier signal that signal processing module generates;

Receiving course is:

B1) coupling module comprises the carrier signal of other train travel information by the contact system collection, and is sent to signal processing module;

B2) signal processing module is handled the carrier signal that comprises other train travel information, obtains the running information of other trains;

B3) signal processing module is sent to the early warning display module with the running information of other trains, shows synchronously with the running information of this train.

Steps A 2) treating process of signal processing module may further comprise the steps in:

A201) running information of parallel mode is converted into the running information of serial mode;

A202), and carry out Base-Band Processing according to the communication protocol coding;

A203) carry out digital frequency conversion and digital filter;

A203) convert digital signal to analog signal;

A203) carry out analog filtering and power gain, obtain carrier signal to be sent.

Step B2) treating process of signal processing module may further comprise the steps in:

B201) carry out analog filtering and power gain;

B202) analog signal conversion is become digital signal;

B203) carry out digital frequency conversion and digital filter;

B204) carry out Base-Band Processing, and, obtain running information according to the communication protocol decoding;

B205) running information of serial mode is converted into the running information of parallel mode.

Described running information comprises the acquisition time of the data of driving a vehicle, running number, location information and the road speed of train.

Compared with prior art; The present invention utilizes existing urban track traffic contact system and ripe relatively carrier communication; Can realize directly bidirectional data interaction communication between the contiguous train, can ensure the train safe operation at ground system owing to avoid the generation of train collision situation under the situation that a variety of causes lost efficacy; Effectively alleviate the contradiction of safety and efficiency; And the related frequency spectrum resource of subway train anti-collision early warning system is loose, receive extraneous interference less relatively, and the communication coverage distance in the tunnel will be far longer than existing wireless communication system.In addition, for communication, except can realizing the direct data communication of contiguous train, also have economy and characteristics of high efficiency.

Description of drawings

Fig. 1 is the structured flowchart of system of the present invention;

Fig. 2 is the integral structure scheme drawing of system of the present invention;

Fig. 3 is the diagram of circuit of the process of transmitting of the inventive method;

Fig. 4 is the diagram of circuit of the receiving course of the inventive method.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.

Embodiment

As shown in Figure 1, a kind of subway train anti-collision early warning system, this system is connected with thetraffic safety device 5 of train, comprises the contact system 1 and the mobile unit that set up along train rail.

Because the contact system of track traffic is a graded insulation, will install passing phase insulator device 12 at the graded insulation place additional earlier, the assurance carrier signal can be failed in contact system 1 in without hindrance dig, and can isolate power frequency and disturb.

Mobile unit is arranged on the train, comprises bonded assembly coupling module, signal processing module and earlywarning display module 4 successively.Wherein, coupling module comprises two couplers 2, gathers or send carrier signal with contact system 1 coupling; Because coupler 2 possibly be positioned at the graded insulation place, can't send and the reception carrier signal, so two couplers 2 are as shown in Figure 2; Be located at the front and rear of train respectively, guarantee to have at least not to be positioned at a graded insulation place, also just can guarantee in time this garage car data to be sent to contiguous train; Can receive simultaneously contiguous train data sent, also play the effect of redundancy backup.Signal processing module then comprises bonded assembly filtering power amplifier unit 31, D/A conversion unit 32, digital frequency conversion filter unit 33, Base-Band Processing andcommunications protocol unit 34 and string and converting unit 35 successively; Two couplers 2 that filtering power amplifier unit 31 connects in the coupling module connect respectively through cooresponding data-interface 6 between string and converting unit 35, earlywarning display module 4 and thetraffic safety device 5 in twos.

For a train; Adopt the subway train anti-collision early warning method of said system to comprise the process of transmitting of this train travel information and the receiving course of other train travel information; Running information is the important information of running number, location information and the road speed of the acquisition time that comprises the data of driving a vehicle, train, and process of transmitting and receiving course carry out synchronously, immediate updating; Guarantee that each train can learn the real time information of other contiguous trains, play the effect of anti-collision early warning.

Described process of transmitting is as shown in Figure 3:

Steps A 1) the traffic safety device of train is sent to early warning display module and signal processing module respectively with the running information of this train;

Steps A 2) the early warning display module shows the running information of this train, and signal processing module is handled the running information of this train, generates the carrier signal that comprises running information;

Steps A 3) coupling module is sent to contact system with the carrier signal that signal processing module generates;

Described receiving course is:

Step B1) coupling module comprises the carrier signal of other train travel information by the contact system collection, and is sent to signal processing module;

Step B2) signal processing module is handled the carrier signal that comprises other train travel information, obtains the running information of other trains;

Step B3) signal processing module is sent to the early warning display module with the running information of other trains, shows synchronously with the running information of this train.

Wherein, steps A 2) in the treating process of signal processing module specifically may further comprise the steps again:

A201) running information of parallel mode is converted into the running information of serial mode;

A202), and carry out Base-Band Processing according to the communication protocol coding;

A203) carry out digital frequency conversion and digital filter;

A203) convert digital signal to analog signal;

A203) carry out analog filtering and power gain, obtain carrier signal to be sent.

Step B2) treating process of signal processing module then may further comprise the steps in:

B201) carry out analog filtering and power gain;

B202) analog signal conversion is become digital signal;

B203) carry out digital frequency conversion and digital filter;

B204) carry out Base-Band Processing, and, obtain running information according to the communication protocol decoding;

B205) running information of serial mode is converted into the running information of parallel mode.

Employing native system and method thereof can be at ground system because under the situation that a variety of causes lost efficacy; The driver can come the artificial driving of realization of safety according to the contiguous train travel information that the subway train anti-collision early warning system is shown; Just can effectively avoid when signal system is paralysed, taking place the situation of train colliding; Effectively alleviate the contradiction of safety and efficiency, prevent train colliding that very significant values is arranged as the emergency power system.

Claims (7)

1. subway train anti-collision early warning system, this system is connected with the traffic safety device of train, it is characterized in that, comprising:

Contact system sets up along train rail, and the graded insulation place of described contact system is provided with passing phase insulator device;

Mobile unit; Be provided with ON TRAINS; Comprise bonded assembly coupling module, signal processing module and early warning display module successively, described coupling module and contact system coupling are gathered or are sent carrier signal, and described signal processing module all is connected with the traffic safety device with the early warning display module.

2. subway train anti-collision early warning system according to claim 1 is characterized in that, described coupling module comprises two couplers at least, when train is advanced, exists a coupler not to be positioned at the graded insulation place of contact system at least.

3. subway train anti-collision early warning system according to claim 2 is characterized in that described coupler has two, lays respectively at the front and rear of train.

4. subway train anti-collision early warning system according to claim 1; It is characterized in that; Described signal processing module comprises bonded assembly filtering power amplifier unit, D/A conversion unit, digital frequency conversion filter unit, Base-Band Processing and communications protocol unit and string and converting unit successively; Described filtering power amplifier unit connects coupling module, connects in twos respectively through cooresponding data-interface between described string and converting unit, early warning display module and the traffic safety device.

5. one kind is adopted the subway train anti-collision early warning method of system according to claim 1, it is characterized in that, comprises the process of transmitting of this train travel information and the receiving course of other train travel information, and described process of transmitting and receiving course carry out synchronously, wherein

Process of transmitting is:

A1) the traffic safety device of train is sent to early warning display module and signal processing module respectively with the running information of this train;

A2) the early warning display module shows the running information of this train, and signal processing module is handled the running information of this train, generates the carrier signal that comprises running information;

A3) coupling module is sent to contact system with the carrier signal that signal processing module generates;

Receiving course is:

B1) coupling module comprises the carrier signal of other train travel information by the contact system collection, and is sent to signal processing module;

B2) signal processing module is handled the carrier signal that comprises other train travel information, obtains the running information of other trains;

B3) signal processing module is sent to the early warning display module with the running information of other trains, shows synchronously with the running information of this train.

6. subway train anti-collision early warning system according to claim 5 is characterized in that, steps A 2) in the treating process of signal processing module may further comprise the steps:

A201) running information of parallel mode is converted into the running information of serial mode;

A202), and carry out Base-Band Processing according to the communication protocol coding;

A203) carry out digital frequency conversion and digital filter;

A203) convert digital signal to analog signal;

A203) carry out analog filtering and power gain, obtain carrier signal to be sent;

Step B2) treating process of signal processing module may further comprise the steps in:

B201) carry out analog filtering and power gain;

B202) analog signal conversion is become digital signal;

B203) carry out digital frequency conversion and digital filter;

B204) carry out Base-Band Processing, and, obtain running information according to the communication protocol decoding;

B205) running information of serial mode is converted into the running information of parallel mode.

7. subway train anti-collision early warning system according to claim 5 is characterized in that, described running information comprises the acquisition time of the data of driving a vehicle, running number, location information and the road speed of train.

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