CN2542534Y - Train proximity early warning system - Google Patents

Abstract

A train approach warning device comprises a ground receiving equipment, and is characterized by also comprising a locomotive launching equipment which is arranged on vehicles and consists of a locomotive speed collecting circuit, control microcomputer circuit, a voice alarm circuit, POCSAG coding circuit, and a wireless transmitter. The utility model can ensure personnel safety and production equipment safety, and has the advantages of long protection distance, simple procedure for obtaining train approach information, good commonality, and continuous protective zone.

Description

Train is near forewarn system

One, technical field

The utility model relates to train and in the related personnel of railway line operation and the safety problem of equipment, particularly relates to train near forewarn system.

Two, background technology

In railway transportation is produced, the all multidisciplinary operations such as construction, use, maintenance and maintenance that all directly or indirectly participate in the circuit technical equipment relevant with driving with other of railway, this just requires to ensure that train reaches in the related personnel of railway line operation and the safety of equipment.In addition, when passing through circuit, also have to find that how in time train is approaching, in time dodges problem with irrelevant other power actuated vehicles of railway operation.For this reason, each specialized department of railway is researching and solving the way of the problems referred to above always, and has adopted some safety precautionss in succession, for example: during line construction at the construction field (site) two ends establish special messenger protection, adopt interim construction protection equipment monitor train approaching simultaneously; To trackside maintenance staff and temporarily the personnel of reaching the standard grade wear the hand-hold wireless interphone, monitor trainman and station, scheduling dialogue, and judge when descend the road avoidance according to gained information; Establish special messenger nurse at level crossing, and install train proximity sensing equipment monitor train near etc.Yet above-mentioned measure all is to consider for some specific occasions of native system, this department, and is fixed, can only in certain scope, play a role, bigger limitation is arranged, and especially along with the raising of train speed, these limitation and inadaptability are just more outstanding.

Three, summary of the invention

The utility model technical issues that need to address are: provide train near forewarn system, it can ensure the person and the safety of production facilities, and its protection distance grows, obtains that train is simple near the formality of information, commonality good and protective zone is continuous.

The technical solution of the utility model is: train is near forewarn system, it comprises ground receiving equipment, it also comprises vehicle-mounted transmitter, described vehicle-mounted transmitter is installed on the locomotive, and is made up of locomotive speed Acquisition Circuit, control microcomputer circuit, alarm voice circuit, POCSAG encode circuit and transmitting set.

The utility model compared with prior art has following advantage:

The utility model directly from the locomotive harvester garage advance information, send train at a certain time interval continuously earthward near voice suggestion and train running speed by the onboard wireless transmitter, the signal covering radius reaches 4Km, defectives such as so just having overcome that the protective zone that the various fixed types ground safeguard procedures of present use exist is discontinuous, protection distance short, obtain the approaching formality complexity of train, be various, not general.

For ground receiving equipment, not only existing various device all can use as usual, as long as and various self-propelled vehicle installs corresponding radio receiver additional and just can obtain train at any time and arouse attention near information when level crossing (cross), avoid taking place the accident with train colliding, guarantee the safety of the person and equipment.

Four, description of drawings

Fig. 1 is that the utility model train is near forewarn system transmitter principle block diagram;

Fig. 2 receives the public address block diagram for the utility model;

Fig. 3 is the utility model schematic circuit diagram;

Fig. 4 is the utility model main flow chart;

Fig. 5 is the utility model interrupt routine diagram of circuit.

Five, the specific embodiment

Train is made up of vehicle-mounted transmitter and ground receiving equipment two parts near forewarn system, is applicable to the various radio receivers of various model locomotives and same frequency range.The transmitter that is installed on the locomotive mainly is made up of locomotive speed Acquisition Circuit, control microcomputer circuit, alarm voice circuit, POCSAG encode circuit transmitting set etc.The locomotive speed collection realizes by reading machine carriage kilometer meter impulse singla; The control microcomputer is that core constitutes with the 89C2051 micro controller system; Transmitting set adopts the GP88 radio station.Used for vehicle-carrying equipment locomotive 110V DC power supply.Ground receiver adopts hand-hold wireless interphone, dedicated pagers, private radio receiver etc.This system adopts 467.575MHz worker be engaged in constructing frequency, low power transmissions, to not influences such as train dispatch radio communications.

System host tests the speed according to locomotive running speed and sends the sound of blowing a whistle, voice, Km speed data.Receive pager and should receive train proximity sensing sound or vibrations, display alarm symbol BJ, speed symbol SD, speed data Km/h.Receiver receives that alarm message flashes and chimes of doom.After getting locomotive kilometers meter impulse singla control emission alarm message, accomplish to stop and do not report to the police, locomotive operation reaches certain speed emission alarm message.

Train mainly receives public address, GP88 hand-held radio telephone and dedicated pagers etc. by main frame (emitter), voice receiver, voice near forewarn system and forms.

Main frame (emitter) is placed in the locomotive, and radical function is to gather train speed, and judges whether to send train proximity sensing information in view of the above, the emission of control radio station.

Voice receiver, GP88 hand-held radio telephone and dedicated pagers buying finished product are equipped with to ground appointees, carry so that receive train at any time near early warning signal.

Voice receive public address and are placed on the more and concentrated places of operating personnel such as ground construction place.At any time receiving train reminds the workmen in time to dodge near information and by sound equipment.

Important technological parameters: power: 4W field intensity covering radius: 4Km modulation sensitivity: 44.8 ± 15dbm modulation limitations: ± 5KHz total harmonic distortion:＜10% carrier deviation: ± 350Hz starts emission rate: 〉=5Km/h alarm voice: 5 seconds power supplys in 10 seconds intervals: 75V-110V DC frequency: 467.575MHz work accommodation temperature :-20～+ 60 ℃ of equipment size: 180 * 100 * 90mm receive sound amplifier technical indicator frequency: 467.575MHz modulation system: FM frequency stability: ± 599M antenna impedance: 50 Ω receiving sensitivities: 0.25 μ v power output: 10W supply voltage: 12V operating temperature :-30～+ 60 ℃ of ranges of application: the line construction protection

Receiver, GP88 hand-held radio telephone and dedicated pagers are commercial product, and technical index is seen product description.

Main frame (emitter) functional block diagram is seen Fig. 1, and the explanation of main frame schematic symbol: SD is the locomotive kilometers meter, and DY is a power supply, and DT is the radio station, and YY is a voice unit, and FM is for resetting, and MB is a panel, and HP is voice, and PTT is the radio station emission switch.

Train mainly partly is made up of single chip machine controlling circuit, sound circuit, information channel circuit, transmitting station, emitting antenna and power supply etc. near main frame (emitter) part of forewarn system.

Main frame (emitter) working power is taken out by locomotive 110V dc power supply terminal, converts direct current 12V to through DC/DC, and the power supply platform uses after the LM338 voltage stabilizing again.Become the 5V direct supply to use through 7805 voltage stabilizings simultaneously for single chip machine controlling circuit and other circuit.

Locomotive kilometers meter output pulse signal is given 89C2051 Single-chip Controlling unit, after computing, judge locomotive speed, if speed greater than 5Km/h, then forms corresponding voice messaging and data, start PTT then the GP88 radio station is opened, voice and data message are sent.

Circuit operation

Single chip machine controlling circuit is that core is joined certain peripheral circuit formation single-chip computer control system with the 89C2051 micro controller system.89C2051 is 8031 series monolithics, includes 2K electric erasable program store, joins the DS1232 watchdog chip outward, constitutes watchdog circuit.This part radical function is to read in real time by information channel circuit to send train speed information here, and determines that according to train speed the time of emission information sends the PTT level, opens the radio station, starts to call corresponding voice and send numeric data code.

The physical circuit principle of work is as follows:

Locomotive speed meter signal SD, train speed signal after photoelectrical coupler U4 delivers to LM393 shaping amplification is delivered to 7 pin of 89C2051, judge concrete speed and send the PIT level to radio station DT, make sound circuit YY send alarm voice and numerical code, to radio station DT signal input HP warning signal is launched through mixing HP.

Information channel circuit;

Comprise train speed isolation and shaping etc.Its radical function is the locomotive speed impulse singla to be delivered to CPU carry out computing.

Voice receive public address;

Voice receive public address and are made up of voice receiver module and power amplifier, power supply.Sound circuit;

Circuit is made up of 89C2051 micro controller system and ISD1420 sound circuit, and used voice segment is deposited in the voice sheet, is called by CPU control, and the voice segment table is as follows.

Segment number	Content	Second number
			1	1	0.5
2	2	0.5
			3	3	0.5
4	4	0.5
			5	5	0.5
6	6	0.5
			7	7	0.5
8	8	0.5
			9	9	0.5
10	Pick up	0.5
			11	Hundred	0.5
12	Speed	1
			13	Km	1
14	Blow a whistle	1.5
			15	Train left to be coming and please noted	5

The software of native system is made up of main program and interrupt routine two parts.The main program radical function is to read the train speed value, sends as transferring the audio alert signal to give transmitting station greater than 5km/h.Main program flow chart is seen Fig. 4.The function of interrupt routine is to measure the width of vehicle speed pulse and be converted into the train speed value with this.Diagram of circuit is seen Fig. 5.

The explanation of main program software function module

Self check: the CPU built in self testing, mainly be instruction system, ram in slice, I/O port etc.

Interference protection is handled: to the setting of the CPU internal piloting storage that can not change in the whole procedure implementation, the functional definition etc. of setting, opening interruption, I/O mouth as interrupt priority carries out the function setting redundancy, be about to relevant setting command is placed in the main program loop body, so both made and disturbed the change that causes function setting, but in next circulation implementation of main program, can correct at once.

The alarm voice messaging forms: if the speed of a motor vehicle greater than 5Km/h, is found out the cooresponding various corresponding data of speed by the mode of tabling look-up, be stored in " information sending area " then with to be sent.

Send " voice messaging piece ": control PTT opens the radio station, transfers " voice messaging piece " to give the radio station and launches, and closes transmitting station then.

Send time-delay at interval: determine by the speed of a motor vehicle to delay time behind the pitch time of twice transmission.

The explanation of interrupt routine functional module

The reading speed pulse width

Adopt timer 0 mode of operation 1 to read each pulse width automatically, pulsating sphere is 2us～131070us.(clock frequency is 6MHz), and deposit the pwm value of reading in " pulse memory space ", need read 200 pulses altogether.

Calculating 200 average pulse values and produce 200 pulses because wheel whenever circles, is the basic pulse width value so get the aviation value of 200 pulses.

Ask train speed to obtain corresponding train speed with the aviation value of pulse width and store.

Claims (4)

1, train is near forewarn system, it comprises ground receiving equipment, it is characterized in that: further comprising vehicle-mounted transmitter, described vehicle-mounted transmitter is installed on the locomotive, and is made up of locomotive speed Acquisition Circuit, control microcomputer circuit, alarm voice circuit, POCSAG encode circuit and transmitting set.

2, train according to claim 1 is near forewarn system, it is characterized in that: described control microcomputer circuit is made of (89C2051) and peripheral circuit, described locomotive speed Acquisition Circuit (SD) is delivered to 7 pin of micro controller system (89C2051) after photoelectrical coupler (U4) send the LM393 shaping to amplify, described alarm voice circuit is made up of micro controller system (89C2051) and ISD1420.

3, train according to claim 1 and 2 is characterized in that near forewarn system: described micro controller system (89C2051) is 8031 system's micro controller systems, includes 2K electric erasable program store, joins watchdog chip (DS1232) outward and forms.

4, train according to claim 3 is characterized in that near forewarn system: described transmitting set adopts radio station GP88, and described ground receiver adopts hand-hold wireless interphone, dedicated pagers, private radio receiver.

Images