CN2233644Y

CN2233644Y - Communication system for railway

Info

Publication number: CN2233644Y
Application number: CN 95212440
Authority: CN
Inventors: 吴蔚英; 田永水
Original assignee: INST NO 54 MINISTRY OF ELECTRONIC INDUSTRY
Current assignee: INST NO 54 MINISTRY OF ELECTRONIC INDUSTRY
Priority date: 1995-06-08
Filing date: 1995-06-08
Publication date: 1996-08-21
Anticipated expiration: 2005-06-08

Abstract

The utility model discloses a bright interval communication system for railway. The utility model is composed of an omnidirectional antenna, a directional antenna, a transmitting and receiving device, a controller, a direct-current power supply, etc. Without changes in any original communication facility, weak field areas in the moats of mountain areas are eliminated, and meanwhile, same frequency interference generated when a train goes into a same frequency area is overcome. The utility model also has the advantages of simple production, low cost, convenient installation and maintenance, reliable performance, etc., being an ideal device for overcoming the communication of the weak field areas in the moats of mountain areas.

Description

Communicator between the railway area pellucida

The utility model relates to communicator between railway area pellucida in a kind of communications field, is specially adapted to railway at the remote communicator of mountain area moat road intercropping.

Train is when driving in mountains, because the existence in temporary road, mountain area, in mountain railway communication, there is many feeble fields district, between the ripe title area pellucida, feeble field district in the communication of this mountain area, be difficult to guarantee writing to each other between train driving and the station between the area pellucida, bring difficulty to traffic safety, can not guarantee the liaison between the area pellucida reliably.

The purpose of this utility model is to avoid the weak point in the above-mentioned background technology and communicator between a kind of railway area pellucida that is suitable for communicating by letter in the moat road, mountain area is provided, the utility model also has to be manufactured simply, with low cost, installation and maintenance are convenient, the dependable performance characteristics, and the communication not changing between any facility realization railway area pellucida of original communication is very easy to communicate by letter between the area pellucida open-minded.

The purpose of this utility model is finished in the following manner: it is by omnidirectional antenna 1, directional antenna 2,

transceiver

3,4, controller 5, DC power supply 6 are formed, and reach AT STATION and communicator respectively is set between the area pellucida between an identical railway area pellucida makes repeater, wherein omnidirectional antenna 1 and transceiver 3 gone into end and is connected, directional antenna 2 is gone into end with transceiver 4 and is connected, each of

transceiver

3,4 come in and gone out to hold and is connected with the discrepancy end of controller 5 respectively, and DC power supply 6 output+V voltages are connected with each power end of

transceiver

3,4, controller 5.

The utility model controller 5 is by digital to analog converter 8, single chip microcomputer 9, memory 10,

switch

11,12 form, wherein

transceiver

3,4 go out end respectively with digital to analog converter 8 go into

end

1,2 pin connect, end 5 pin that go out of digital to analog converter 8 are connected with end 1 pin of going into of single chip microcomputer 9, the discrepancy of single chip microcomputer 9 holds 5 pin and the discrepancy of memory 10 to hold 1 pin to be connected, go out

end

7,8 pin respectively with

transceiver

3,4 the end of going into connects, one end, 1 to 8 pin and the resistance R 3 of 2 pin and switch 12, the end of R4 also connects, one end, 1 to 8 pin and the resistance R 1 of 6 pin and switch 11, the end of R2 also connects, 3 pin are connected with DC power supply 6 output voltages+V end, 4 pin are connected with the ground end, switch 11, each 1 to 8 pin of 12 the other end and DC power supply 6 output voltages+V end also connects digital to analog converter 8, each 3 pin of memory 10 are connected with DC power supply 6 output+V voltage ends, each 4 pin is connected with the ground end.

The utility model is compared background technology following advantage:

1. the utility model is realized communicating by letter between the area pellucida, do not changing any facility of original communication, only need AT STATION with between the area pellucida this identical device to be set respectively, just can realize the telecommunication in the moat road, mountain area, therefore be very easy to communicate by letter between the area pellucida open-minded.

2. be provided with controller 5 in the utility model and be used to discern, overcome train and sailed the co-channel interference that produces with the frequency district into, guaranteed that communication performance is reliable with distinguishing frequently.

3. the utility model is manufactured simply, and is with low cost, and installation and maintenance are convenient, is convenient to penetration and promotion and uses.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a functional-block diagram of the present utility model.

Fig. 2 is the electrical schematic diagram of the utility model controller 5.

With reference to Fig. 1, Fig. 2, the utility model is made up of omnidirectional antenna 1, directional antenna 2,

transceiver

3,4, controller 5, DC power supply 6.The utility model work the time reaches AT STATION and communicator respectively to be set between an identical railway area pellucida as repeater between the area pellucida, communicating by letter between carrying out between station and area pellucida.Omnidirectional antenna 1 is gone into end with transceiver 3 and is connected, directional antenna 2 is gone into end with transceiver 4 and is connected, each of

transceiver

3,4 come in and gone out to hold and is connected with the discrepancy end of controller 5 respectively, embodiment omnidirectional antenna 1 adopts homemade bar antenna to make, directional antenna 2 adopts homemade Yagi antenna to make, and omnidirectional antenna 1 and directional antenna 2 its effects are used for receiving the electromagnetic wave that sends

signal.Embodiment transceiver

3,4 adopts 2010 type transceivers of New Zealand's import to make, and is used for receiving the transmission signal of communication.

Controller 5 of the present utility model is made up of digital to analog converter 8, single chip microcomputer 9, memory 10,

switch

11,12, and the annexation of its circuit is as follows:

Transceiver

3,4 go out end respectively with digital to analog converter 8 go into

end

7,8 pin respectively with

transceiver

3,4 the end of going into connects, one end, 1 to 8 pin and the resistance R 3 of 2 pin and switch 12, the end of R4 also connects, one end, 1 to 8 pin and the resistance R 1 of 6 pin and switch 11, the end of R2 also connects, 3 pin are connected with DC power supply 6 output voltages+V end, 4 pin are connected with the ground end, switch 11, each 1 to 8 pin of 12 the other end and DC power supply 6 output voltages+V end also connects digital to analog converter 8, each 3 pin of memory 10 are connected with DC power supply 6 output+V voltage ends, each 4 pin is connected with the ground end.Digital to analog converter 8 its effects are the analog signal conversion of

transceiver

3,4 inputs that digital signal input single chip microcomputer 9 carries out the computing differentiation, and embodiment digital to analog converter 8 adopts 0801 commercially available type integrated package to make.

Switch

11,12 its effects are an artificial stop voltage the highest, least restrictive voltage set arbitrarily, import single chip microcomputer 9 respectively, single chip microcomputer 9 compares differentiation to the digital voltage that the reception voltage signal of the highest least restrictive voltage of

switch

11,12 inputs and

transceiver

3,4 inputs converts to through digital to analog converter 8, single chip microcomputer 9 is exported two respectively according to two status signal results that differentiate and is sent out control

signal input transceiver

4,3 then, whether

control transceiver

4,3 works, and reaches the control purpose.Memory 10 is used for the information of storage control signal.Embodiment single chip microcomputer 9 adopts 8031 commercially available type single chip microcomputers to make, memory 10 adopts 2732 commercially available type integrated packages to make, switch 11,12 adopts eight commercially available key switchs to make, embodiment DC power supply 6 adopts common DC power supply circuit self-control to form, output+12V voltage provides

transceiver

3,4, controller 5 operating voltages at different levels.

The concise and to the point operation principle of the utility model is as follows: the utility model is in when work, for not changing any facility that original train is communicated by letter with the station, so AT STATION and respectively establish the utility model device between the area pellucida as repeater.Controller 5 of the present utility model adds two control signals when work, the one, the f1 field intensity indication received signal that transceiver 3 receives, the 2nd, the f2 busy-back signal received signal that transceiver 4 receives,

transceiver

3,4 all is to stop paying out state under normal conditions, the control signal P that sends out of the single chip microcomputer 9 no

transceivers

3,4 in the controller 5 exports, and only situation about satisfying in some condition just can be put and be sent out a transceiver 3 or a transceiver 4.After receiving signal, the receiver of transceiver 3 send f1 field intensity index signal to controller 5,11 pairs of single chip microcomputers of switch 9 are set a maximum field strength index signal, once the f1 field intensity index signal that receives is during greater than, the maximum field strength index signal that equals to set, then single chip microcomputer 9 is sent the control signal P signal to transceiver 4, is promptly at this moment put by transceiver 3 and sends out a transceiver 4.If the receiver of transceiver 3 is received signal and is sent f1 field intensity index signal less than the maximum field strength index signal of setting to controller 5, at this moment single chip microcomputer 9 will be judged two amounts, the one, this f1 field intensity index signal whether less than 12 pairs of single chip microcomputers of switch 9 set the minimum field strength index signal, the 2nd, judge whether the f2 busy-back signal voltage that transceiver 4 receives equals zero, if f2 busy-back signal voltage equals zero, and f1 field intensity index signal is less than the minimum field strength index signal of setting, represent that then train is in the somewhere outside distinguishing frequently, at this moment single chip microcomputer 9 is sent out control signal P signal to sending of transceiver 4, promptly at this moment sends out receiver 3 and puts a transceiver 4.

When train driving during at the feeble field section position, transceiver 3 receivers that the signal of communication that transceiver on the train is sent out is set at the utility model device repeater in feeble field district certainly receive, the signal of communication that converts transceiver 4 then to sends, the utility model device repeater transceiver 4 that is provided with AT STATION receives the signal that feeble field district transceiver 4 sends, and produces f2 busy-back signal voltage.The utility model device repeater transceiver 3 of station setting also may be received this signal, also may can not receive this signal, but f1 field intensity index signal is not too large certainly, at this moment this device at station repeater produces f2 busy-back signal voltage and puts transceiver 3 work of sending out this device repeater, the f1 signal of communication that transmitting-receiving feeble field district sends, this device repeater f1 signal of communication of sending in feeble field district is also received by the former transceiver in station like this, reaches the communication distance purpose of having extended the station transceiver.

If when train sails into distinguishing frequently, at this during with section position frequently, the f1 signal of communication that the former transceiver in existing station sends, the f1 signal of communication that sends at feeble field district the utility model device repeater is arranged again, if these two f1 communication signal frequency differences are in 300 to 3400Hz scopes, and these two signal levels similar again (in the 20db), the train operator forms co-channel interference certainly when conversation so, at this moment the controller 5 one in station the utility model device repeater will be judged the minimum field strength index signal whether the f1 field intensity indication signal of communication of reception is set greater than single chip microcomputer 9, the 2nd, judge whether the f2 busy-back signal of transceiver 4 generations in this device repeater equals zero.When the time with the frequency section, the f2 busy tone voltage that station the utility model device repeater transceiver 4 produces equals zero, the field intensity index signal that the signal of communication f1 field intensity index signal that transceiver 3 receives is set greater than minimum, then controller 5 does not send the control signal P that sets out,

transceiver

3,4 all is in the state of stopping paying out, thereby eliminated co-channel interference, finished effect of the present utility model and function with the frequency section.

The utility model mounting structure is as follows: controller 5 of the present utility model be installed in one be of a size of long * wide be in 160 * 120 millimeters printed boards,

transceiver

3,4 for the individual components of outsourcing, DC power supply 6 is also from making independently parts, then the printed board of controller 5,

transceiver

3,4, the parts of DC power supply 6 are installed in long 466 millimeters, wide 250 millimeters, in the high 234 millimeters cabinet, on the panel of cabinet, install and omnidirectional antenna 1, the antenna cable socket that directional antenna 2 links to each other, omnidirectional antenna 1, directional antenna 2 is installed near the ground of cabinet, be connected with antenna cable socket on the cabinet by cable, on the back shroud of cabinet, electric power connection line be installed.The utility model is installed near feeble field district and the station open-air local when using, and with stuffing box cabinet sealing installation, reach environmental protection effect such as rainproof, dustproof, sun-proof.

Claims

1. one kind by omnidirectional antenna (1), directional antenna (2), transceiver (3,4), communicator between the railway area pellucida that DC power supply (6) is formed, it is characterized in that also forming by controller (5), and reach AT STATION and communicator respectively is set between the area pellucida between an identical railway area pellucida makes repeater, wherein omnidirectional antenna (1) and transceiver (3) are gone into end and are connected, directional antenna (2) is gone into end with transceiver (4) and is connected, transceiver (3,4) each come in and gone out to hold and is connected DC power supply (6) output+V voltage and transceiver (3 with the discrepancy end of controller (5) respectively, 4), each power end of controller (5) connects.

2. communicator between railway according to claim 1 area pellucida, it is characterized in that controller (5) is by digital to analog converter (8), single chip microcomputer (9), memory (10), switch (11,12) form, wherein transceiver (3,4) go out end respectively with digital to analog converter (8) go into end 1,2 pin connect, end 5 pin that go out of digital to analog converter (8) are connected with end 1 pin of going into of single chip microcomputer (9), the discrepancy of single chip microcomputer (9) holds 5 pin to hold 1 pin to be connected with the discrepancy of memory (10), go out end 7,8 pin respectively with transceiver (3,4) the end of going into connects, one end, 1 to 8 pin and the resistance R 3 of 2 pin and switch (12), the end of R4 also connects, one end, 1 to 8 pin and the resistance R 1 of 6 pin and switch (11), the end of R2 also connects, 3 pin are connected with DC power supply (6) output voltage+V end, 4 pin are connected with the ground end, switch (11,12) the other end 1 to 8 pin and DC power supply (6) output voltage+V end also connects digital to analog converter (8), each 3 pin of memory (10) are connected with DC power supply (6) output+V voltage end, each 4 pin is connected with the ground end.