CN203698308U

CN203698308U - Train arrival wireless pre-alarming system

Info

Publication number: CN203698308U
Application number: CN201420076018.5U
Authority: CN
Inventors: 陈昭颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-02-17
Filing date: 2014-02-17
Publication date: 2014-07-09
Anticipated expiration: 2024-02-17

Abstract

The utility model discloses a train arrival wireless pre-alarming system. The train arrival wireless pre-alarming system is composed of a station yard rail circuit, a train station approaching monitor transmitting device (2) and a train station approaching wireless pre-alarming unit (3). The station yard rail circuit comprises a station yard track approaching relay and a train station pass-by signal relay; the train station approaching monitor transmitting device (2) comprises a train approaching rail occupation monitoring circuit (21), a microprocessor (22), a monostable timer (23), a level shifter (24), a modulator (25), a high-frequency power amplifying circuit (26), a transmitting antenna (27) and a transmission power supply; the train station approaching wireless pre-alarming unit (3) comprises a receiving antenna (31), a high-frequency amplifier (32), a modulator (33), a voice module (34), an audio frequency amplifier (35), a loudspeaker (36) and a pre-alarming unit power source. The train arrival wireless pre-alarming system can monitor and pre-alarm the arrival of trains on rails and accordingly prevent accidents.

Description

The train wireless alarming system that enters the station

Technical field

The utility model relates to the safety system on a kind of railway, particularly a kind of train wireless alarming system that enters the station.

Background technology

Track on railway, road base, signalling set, pipeline etc. need often to safeguard, be engaged in handling labor and have very large danger on railway, often occur that railroad maintenance personnel are by the passing train accident even colliding to death of wounding.Train on railway is a lot, also very fast, particularly especially true on high ferro circuit at present.Busy and fast speed train has brought a lot of safety misadventures to the people who does maintenance work on railway, trace it to its cause, be mainly because: the workman who at present carries out maintenance on railway, it is mainly the train of observing dealing by eyes, in the time that train soon approaches station, leave immediately rail, after waiting the train past, then carry out operation near rail.This method for early warning, often be difficult to avoid the generation of accident, doing maintenance because sometimes concentrate, be difficult to can accurately observe the arrival of train at every turn, slightly do not looking, just there is safety misadventure, also likely maintenance section, at bend place, is often difficult to see train, in the time seeing train, be to have little time to have dodged, often occurred safety misadventure.

Summary of the invention

The purpose of this utility model is overcome the above-mentioned deficiency of prior art and a kind of train wireless alarming system that enters the station is provided; it is mainly used in rail yard (station) service personnel and uses; its can be accurately and timely the arriving of train (being that every multiple line is divided into uplink path and downing track) on the multiple line of monitoring and prediction simultaneously rail; avoid the generation of safety misadventure, protected well railroad maintenance personnel.

The technical solution of the utility model is: a kind of train wireless alarming system that enters the station, and it comprises a station track circuit, Train Approaching station monitoring feedway and the wireless predictor in Train Approaching station, a track circuit of standing comprises that an approaching station track relay and train are by station field signal relay, the coil that approaches a station track relay is connected between two rails that approach a station track, train provides the relay of signal current by station field signal relay for train by signal lamp, Train Approaching station monitoring feedway comprises that train occupation approaches railway monitoring circuit, microprocessor, monostable timing device, level translator, modulator, high-frequency power amplifying circuit, emitting antenna and emission power, train occupation approaches railway monitoring circuit and is connected by station field signal relay with train with an approaching station track relay of a station track circuit, train occupation approaches railway monitoring circuit and is also connected with one group of I/0 port of microprocessor, another group I/0 port of microprocessor is connected with the switching value end of the I/0 port of modulator by monostable timing device, realize the control of the on off state to modulator, the sending and receiving end of microprocessor is connected with the transmitting-receiving port of modulator by level translator, the wireless telecommunications end of modulator is connected with emitting antenna by high-frequency power amplifying circuit, and train occupation approaches railway monitoring circuit, microprocessor, monostable timing device, level translator, modulator, high-frequency power amplifying circuit is all connected with emission power, Train Approaching station is wireless, and predictor comprises receiving wire, radioamplifier, demoder, voice module, audio-frequency power amplifier, loud speaker and predictor power supply, receiving wire, radioamplifier, demoder, voice module, audio-frequency power amplifier are connected successively, receiving wire, radioamplifier, demoder, voice module, audio-frequency power amplifier are all connected with predictor power supply, Train Approaching station is wireless, and predictor can receive the signal from the transmitting of Train Approaching station monitoring feedway, and plays corresponding voice according to signal by its loud speaker.

The further technical scheme of the utility model is: a described approaching station track relay comprises approaching stands a uplink path relay and approaches the row track relay after the match of standing; Approach a station uplink path relay and comprise that a first approaching station uplink path relay, second approaches station field uplink path relay and the 3rd and approaches a station uplink path relay; First approaches a station uplink path relay, second approaches between two rails that coil that a station uplink path relay and the 3rd approaches a station uplink path relay is connected to three sections of tracks that ENTRANCE place that uplink path approaches station draws near; Approach station after the match row track relay comprise that first approaches the row track relay of standing after the match, second and approach the row track relay and the 3rd after the match of standing and approach the row track relay after the match of standing; First approaches the row track relay after the match of standing, second approaches the row track relay and the 3rd after the match of standing and approaches between two rails that the coil of row track relay after the match of standing is connected to three sections of tracks that ENTRANCE place that downing track approaches station draws near; Train comprises that by station field signal relay the up train passes through station field signal relay by stand field signal relay and down train, and the up train is the relay that signal current is provided by signal lamp for the up train at station by station field signal relay; Down train is the relay that signal current is provided by signal lamp for the down train at station by station field signal relay.

The utility model further technical scheme is: described train occupation approaches railway monitoring circuit and comprises two electronic switch integrated package CD4066,8 gating circuits of two electronic switch integrated package CD4066 compositions, form 8 control end C, 8 input end IN and 8 mouth OUT, each input end IN of two electronic switch integrated package CD4066 is connected with emission power by current-limiting resistance respectively, train occupation approaches between the I/0 port of railway monitoring circuit and microprocessor and is also connected with antijamming blackout, antijamming blackout is RC integrating circuit, form 8 integrating circuits by 8 pairs of resistance capacitances, every integrating circuit is connected with a control end C of electronic switch integrated package CD4066 respectively, each approaching station track relay is connected with a control end C of electronic switch integrated package CD4066 respectively by a station track relay with train, first approach the row track relay after the match of standing, second approaches the row track relay after the match of standing, the 3rd approaches the row track relay after the match of standing, first approaches a station uplink path relay, second approaches a station uplink path relay, the 3rd approaches a station uplink path relay, down train is connected with a control end C of electronic switch integrated package CD4066 respectively by the contact of station field signal relay STJ with the up train by station field signal relay XTJ.

The utility model further technical scheme is: described microprocessor is AT89S52 chip; The mouth OUT that train occupation approaches the electronic switch integrated package CD4066 of railway monitoring circuit is connected with the P0 port of microprocessor AT89S52 chip, and eight mouth OUT of two electronic switch integrated package CD4066 are connected with eight pins of the P0 port of microprocessor AT89S52 chip by line respectively.

The utility model also further technical scheme is: described level translator is level switch module MAX485 chip; Modulator comprises two wireless data transmission module JZ873, the switching value port of two wireless data transmission module JZ873 forms eight switch terminals and four sending and receiving ends, and the serial data sending and receiving end (TXD-485A, RXD-485B) of wireless data transmission module JZ873 is connected with the serial data input/output port (TXD end pin 10, RXD hold pin 11) of microprocessor AT89S52 chip by level switch module MAX485 chip; Monostable timing device comprises eight monostable integrated package 74LS121; The switch terminals of wireless data transmission module JZ873 is connected with the P2 port of microprocessor AT89S52 chip by the 74LS121 chip of monostable timing device, and each switch terminals of wireless data transmission module JZ873 is connected with a pin of the P2 port of microprocessor by a 74LS121 chip respectively.

The further technical scheme of the utility model is: described high-frequency power amplifying circuit comprises first order power tube and two power tubes of second stage power tube of common emitter, between the collecting electrode of first order power tube and emission power, be connected with inductance T1, the collecting electrode of first order power tube is also connected with the base stage of second stage power tube by coupling capacitance, and the base stage of first order power tube is connected with the wireless telecommunications end AX of two wireless data transmission module JZ873 respectively by coupling capacitance; On the collecting electrode of second stage power tube, be connected with emitting antenna by LC resonance circuit, the collecting electrode of second stage power tube is also connected with emission power by inductance.

The further technical scheme of the utility model is: described radioamplifier comprises field-effect transistor, the grid of field-effect transistor is connected with receiving wire, on the grid of field-effect transistor, be also connected with the bias circuit of two resistance compositions, between the drain electrode of field-effect transistor and predictor power supply, be connected with drain resistance, the source electrode of field-effect transistor passes through resistance eutral grounding.

The further technical scheme of the utility model is: described demoder comprises two wireless data transmission module JZ873, eight switch terminals of switching value port composition of two wireless data transmission module JZ873, the drain electrode of field-effect transistor is connected with the wireless telecommunications end AX of two wireless data transmission module JZ873 by coupling capacitance respectively.

The further technical scheme of the utility model is: described voice module comprises two speech chip API8108A, the playback trigger end TG of two speech chip API8108A forms eight playback trigger end pins, and eight switch terminals of the switching value port of two wireless data transmission module JZ873 are connected with eight playback trigger end pins of the playback trigger end TG of two speech chip API8108A respectively.

The further technical scheme of the utility model is: described audio-frequency power amplifier is audio-frequency power amplifier LM386, the electric current of speech chip API8108 amplifies mouth cout and is connected with the positive input IN+ of audio-frequency power amplifier LM386 by RC circuit, and the mouth VOUT of audio-frequency power amplifier LM386 is connected with loud speaker by electric capacity.

The utility model compared with prior art has following features:

1. it is mainly used in railroad maintenance librarian use, its can be accurately and timely the arriving of train on the multiple line of monitoring and prediction simultaneously rail, avoid the generation of safety misadventure, protected well railroad maintenance personnel;

Its to do interference performance strong, robustness is good, reliable and stable, the accident that there will not be wrong report to fail to report.

Below in conjunction with the drawings and specific embodiments, detailed structure of the present utility model is further described.

Brief description of the drawings

Fig. 1 is structured flowchart of the present utility model;

Fig. 2 is a station of the present utility model track circuit schematic diagram;

Fig. 3 is the schematic circuit diagram of Train Approaching of the present utility model station monitoring feedway;

Fig. 4 is the schematic circuit diagram of the wireless predictor in Train Approaching of the present utility model station.

Detailed description of the invention

Embodiment 1

As shown in Figure 1: a kind of train wireless alarming system that enters the station, it comprises a station track circuit, Train Approaching station monitoring feedway 2 and the wireless predictor 3 in Train Approaching station.

As shown in Figure 2: a track circuit of standing comprises that an approaching station track relay and train pass through station field signal relay, and an approaching station track relay is divided into approaching station field uplink path relay and approaches the row track relay after the match of standing, approach a station uplink path relay and comprise that the first approaching station uplink path relay SJ1, second approaches station field uplink path relay SJ2 and the 3rd and approaches a station uplink path relay SJ3, first approaches a station uplink path relay SJ1, second approaches between two rails that coil that station uplink path relay SJ2 and the 3rd approaches a station uplink path relay SJ3 is connected to three sections of tracks that ENTRANCE place that uplink path 11 approaches station 12 (field of stand is station) draws near, the first approaching coil of uplink path relay SJ1 of standing is connected between two rails of the first field, approaching station uplink path at the ENTRANCE place of field, the approaching station of uplink path 11 12, the second approaching coil of uplink path relay SJ2 of standing is connected between two rails of the second field, approaching station uplink path at the ENTRANCE place of field, the approaching station of uplink path 11 12, a the 3rd approaching coil of uplink path relay SJ3 of standing is connected between two rails of the 3rd field, approaching station uplink path at the ENTRANCE place of field, the approaching station of uplink path 11 12, approach station after the match row track relay comprise that first approaches the row track relay XJ1 that stands after the match, second and approach the row track relay XJ2 and the 3rd after the match that stands and approach the row track relay XJ3 after the match that stands, first approaches the row track relay XJ1 after the match that stands, second approaches the row track relay XJ2 after the match and the 3rd that stands approaches between two rails that the coil of row track relay XJ3 after the match of standing is connected to three sections of tracks that ENTRANCE place that downing track 13 approaches station 12 draws near, the first approaching coil of row track relay XJ1 after the match of standing is connected between two rails of the first approaching field downing track of standing at the ENTRANCE place of field, the approaching station of downing track 13 12, second approaches the coil of row track relay XJ2 after the match of standing is connected between two rails of the second field, approaching station downing track at the ENTRANCE place of field, the approaching station of downing track 13 12, the 3rd approaches the coil of row track relay XJ3 after the match of standing is connected between two rails of the 3rd field, approaching station downing track at the ENTRANCE place of field, the approaching station of downing track 13 12, train comprises that by station field signal relay the up train passes through station field signal relay XTJ by stand field signal relay STJ and down train, the up train is the relay that signal current is provided by signal lamp (signal lamp that station has been provided with at present) for the up train at station by station field signal relay STJ, when to be the up train start by the field signal relay STJ that stands, can open the up train and pass through signal lamp, down train is the relay that signal current is provided by signal lamp for the down train at station by station field signal relay XTJ, when down train starts by station field signal relay XTJ, can open down train and pass through signal lamp.

As shown in Figure 1,3, monitoring feedway 2 in Train Approaching station comprises that train occupation approaches railway monitoring circuit 21, microprocessor 22, monostable timing device 23, level translator 24, modulator 25, high-frequency power amplifying circuit 26, emitting antenna 27 and emission power; Train occupation approaches railway monitoring circuit 21 and is connected with one group of I/0 port of microprocessor 22, and train occupation approaches between railway monitoring circuit and the I/0 port of microprocessor 22 and is also connected with antijamming blackout; Another group I/0 port of microprocessor 22 is connected with the switching value end of the I/0 of modulator 25 by monostable timing device 23, realizes the control of the on off state to modulator 25; The sending and receiving end of microprocessor 22 is connected with the transmitting-receiving port of modulator 25 by level translator 24, realizes and sends gated information data to modulator 25; The wireless telecommunications end of modulator 25 is connected with emitting antenna 27 by high-frequency power amplifying circuit 26; Train occupation approaches railway monitoring circuit, microprocessor 22, monostable timing device 23, level translator 24, modulator 25, high-frequency power amplifying circuit 26 and is all connected with emission power.

As shown in Figure 3, train occupation approaches the electronic switch integrated package CD4066 that railway monitoring circuit 21 (being the circuit that dotted line 21 encloses) comprises Liang Kuai TI company, the radical function of CD4066 is information gating, current limliting, two electronic switch integrated package CD4066 8 gating circuits of composition (being switch circuit), form 8 control end C (respectively with line X1, X2, X3, X4, X5, X6, X7, the end that X8 is connected), 8 input end IN are (respectively with line XK1, XK2, XK3, XK4, XK5, XK6, XK7, the end that XK8 is connected), 8 mouth OUT are (respectively with line D0, D2, D3, D4, D5, D6, D7, the end that D8 is connected), each input end IN of two electronic switch integrated package CD4066 is respectively by current-limiting resistance (R17, R18, R19, R20, R21, R22, R23, R24) be connected with emission power, for electronic switch integrated package CD4066 power supply source, antijamming blackout is RC integrating circuit, form 8 integrating circuits by 8 pairs of resistance capacitances (C1R9, C2R10, C3R11, C4R12, C5R13, C6R14, C7R15, C8R16), the control end C that every integrating circuit is electronic switch integrated package CD4066 provides an antijamming blackout, and every integrating circuit is connected with a control end C of electronic switch integrated package CD4066 respectively, each approaching station track relay is connected with a control end C of electronic switch integrated package CD4066 respectively by a station track relay with train, first approach the row track relay XJ1 after the match that stands, second approaches the row track relay XJ2 after the match that stands, the 3rd approaches the row track relay XJ3 after the match that stands, first approaches a station uplink path relay SJ1, second approaches a station uplink path relay SJ2, the 3rd approaches a station uplink path relay SJ3, down train is connected with a control end C of electronic switch integrated package CD4066 respectively by the contact of station field signal relay STJ with the up train by station field signal relay XTJ.

As shown in Figure 3, microprocessor 22 adopts the AT89S52 chip of atmel corp, and it is mainly used in that train occupation is approached to the gated information that railway monitoring circuit 21 sends here and converts digital code to, then sends modulator 25 to; The mouth OUT that train occupation approaches the electronic switch integrated package CD4066 of railway monitoring circuit 21 is connected with the P0 port of microprocessor AT89S52 chip, and eight mouth OUT of two electronic switch integrated package CD4066 (end being connected with line D0, D2, D3, D4, D5, D6, D7, D8 respectively) are connected with eight pins (P00, P01, P02, P03, P04, P05, P06, P07) of the P0 port of microprocessor 22 (being AT89S52 chip) by line (D0, D2, D3, D4, D5, D6, D7, D8) respectively.

It is the level switch module MAX485 chip of Maxim that level translator 24 adopts, the wireless data transmission module JZ873 that modulator 25 adopts two Shenzhen Ji Zhuo Science and Technology Ltd.s to produce, wireless data transmission module JZ873 is set to modulation condition, the switching value port of two wireless data transmission module JZ873 forms eight switch terminals (respectively with line K1, K2, K3, K4, K5, K6, K7, the end that K8 is connected) and four sending and receiving ends (respectively with line 485A, the end that 485B is connected), serial data sending and receiving end (the TXD-485A of wireless data transmission module JZ873, RXD-485B) (TXD holds pin 10 to the serial data input/output port by level switch module MAX485 chip and microprocessor 22 (being AT89S52 chip), RXD holds pin 11) be connected, level switch module MAX485 chip is responsible for the level conversion between microprocessor AT89S52 chip and modulator wireless data transmission module JZ873, also play jamproof effect simultaneously, monostable timing device 23 is by the monostable integrated package 74LS121 of eight TI companies, and its effect is to control the time that between modulator 25 and microprocessor 22, data transmit, and can reduce interference, save electric energy, the switch terminals of wireless data transmission module JZ873 is connected with the P2 port of microprocessor AT89S52 chip by the 74LS121 chip of monostable timing device 23, the each switch terminals (end being connected with line K1, K2, K3, K4, K5, K6, K7, K8 respectively) that is wireless data transmission module JZ873 is connected with a pin (P20, P21, P22, P23, P24, P25, P26, P27) of the P2 port of microprocessor by a 74LS121 chip respectively, realizes and transmits gated data information to modulator 25.

High-frequency power amplifying circuit 26 is Class C high-frequency power amplifying circuit, it comprises that capacity coupled two power tubes that two-stage common emitter amplifies (are first order power tube Q1, second stage power tube Q2), between the collecting electrode of first order power tube Q1 and emission power, be connected with inductance T1, the collecting electrode of first order power tube Q1 is also connected with the base stage of second stage power tube Q2 by coupling capacitance C22, the base stage of first order power tube Q1 is by coupling capacitance (C20, C21) (be high-frequency signal end with the wireless telecommunications end AX of two wireless data transmission module JZ873 respectively, also be antenna terminal) be connected, on the collecting electrode of second stage power tube Q2, be connected with emitting antenna 27 by LC resonance circuit (C26, T3), the collecting electrode of second stage power tube Q2 is also connected with emission power by inductance T2.

As shown in Fig. 1,4, Train Approaching station is wireless, and predictor 3 comprises receiving wire 31, radioamplifier 32, demoder 33, voice module 34, audio-frequency power amplifier 35, loud speaker 36 and predictor power supply; Receiving wire 31, radioamplifier 32, demoder 33, voice module 34, audio-frequency power amplifier 35 are connected successively, receiving wire 31, radioamplifier 32, demoder 33, voice module 34, audio-frequency power amplifier 35 are all connected with predictor power supply, and Train Approaching station is wireless, and predictor 3 can receive the signal of launching from Train Approaching station monitoring feedway 2 and play corresponding voice message from loud speaker 36.

As shown in Figure 4, radioamplifier 32 is partial pressure type bias amplifier, it comprises field-effect transistor Q1, the grid of field-effect transistor Q1 is connected with receiving wire 31, on the grid of field-effect transistor Q1, be also connected with the bias circuit of two resistance (R1, R3) composition, between the drain electrode of field-effect transistor Q1 and predictor power supply, be connected with drain resistance R2, the source electrode of field-effect transistor Q1 is by resistance R 4 ground connection; Radioamplifier can amplify to the signal of Train Approaching station monitoring feedway 2 receiving antenna reception.

As shown in Figure 4, demoder 33 comprises the wireless data transmission module JZ873 that two Shenzhen Ji Zhuo Science and Technology Ltd.s produce, two wireless data transmission module JZ873 are set to demodulation state, switching value port eight switch terminals of composition (end being connected with line D0, D1, D2, D3, D4, D5, D6, D7 respectively) of two wireless data transmission module JZ873, the drain electrode of field-effect transistor Q1 is connected with the wireless telecommunications end AX (being high-frequency signal end) of two wireless data transmission module JZ873 by coupling capacitance (C1, C2) respectively.

As shown in Figure 4, voice module 34 comprises the speech chip API8108A of Liang Kuai APLUS company, the playback trigger end TG of two speech chip API8108A forms eight pins, and (each speech chip API8108A has four playback trigger end pin TG1, TG2, TG3, TG4), eight switch terminals (D0 of the switching value port of two wireless data transmission module JZ873, D1, D2, D3, D4, D5, D6, D7) be connected with eight pins of the playback trigger end TG of two speech chip API8108A respectively, corresponding train alarm voice messaging when storing each approaching station track relay and train in speech chip API8108A and being connected by station field signal relay, also the state that can understand like this eight playback trigger end TG of two speech chip API8108A is equivalent to form eight addresses, each addressed memory is having corresponding voice messaging, for example, when the state of eight playback trigger ends is " 00000001 ", first trigger end TG (being the pin 10 of U4) that only has U4 is high level, other trigger end is low level, at this moment the voice messaging in can OPADD " 00000001 ", in advance in " 00000001 " storage " staff please notes, down train first approaches, down train first approaches, down train first approaches, please note safety." voice messaging, the rest may be inferred, can be in advance in " 00000010 " to " 10000000 " respectively storage " staff please notes, down train second approaches, down train second approaches, down train second approaches, please note safety ", " staff please notes, down train the 3rd approaches, down train the 3rd approaches, down train the 3rd approaches, Qing Xia keeps away car in road ", " staff please notes, descending good by signal at clear together, descending good by signal at clear together, descending good by signal at clear together, please note safety ", " staff please notes, the up train first approaches, the up train first approaches, the up train first approaches, please note safety ", " staff please notes, the up train second approaches, the up train second approaches, the up train second approaches, please note safety ", " staff please notes, the up train the 3rd approaches, the up train the 3rd approaches, the up train the 3rd approaches, Qing Xia keeps away car in road ", " staff please notes, up two roads are good by signal at clear, up two roads are good by signal at clear, up two roads are good by signal at clear, please note safety " corresponding voice messaging, also be the pin (be also equivalent to an address) of every voice messaging corresponding to the playback trigger end TG of speech chip API8108A, the power end of speech chip API8108A is connected with predictor power supply by the three-terminal voltage-stabilizing power supply integrated package 78L033 of TI company.

As shown in Figure 4, audio-frequency power amplifier 35 comprises the audio-frequency power amplifier LM386 of National Semiconductor, the electric current of speech chip API8108 amplifies mouth cout and is connected with the positive input IN+ of audio-frequency power amplifier LM386 by RC circuit (R9/R10, R11, C3), and the mouth VOUT of audio-frequency power amplifier LM386 is connected with loud speaker 36 by electric capacity (C5, C7).

Using method of the present utility model and principle of work: below taking first approach the row track relay XJ1 that stands after the match as example describes principle of work of the present utility model, after monitoring feedway 2 in Train Approaching station is connected with a station track circuit, be laid in station, as Figure 1-3, in the time that train soon enters station, just be pressed into first approach between two rails of station downing track after, first approaches the row track relay XJ1 after the match that stands falls, the a of XJ1, b holds closed, just+5 volts of power supplys arrive a of XJ1 by R1, b end, approach again a switch control end C (being pin 13) of first electronic switch integrated package CD4066 (being U1) of railway monitoring circuit 21 to train occupation through X1 line, first electronic switch of U1 is opened conducting, first input end IN (being pin 1) that is U1 is conducted with first mouth OUT (being pin 2), be recorded in conducting state simultaneously, at this moment just+5 volts of power supplys pass through R17, XK1 line, first input end IN (being pin 1) of U1 is to first mouth OUT (being pin 2) of U1, the pin 39 (being the P00 end of I/0 mouth) to the AT89S52 chip (being also the target U11 of Fig. 3 institute) of microprocessor 22 through D0 line again, the P00 end (being pin 39) of AT89S52 chip obtains a high level, also monitoring a first approaching station downing track has train to arrive, U11 after treatment, put 1 (being high level) first to the P20 port (being the pin 21 of AT89S52 chip) of the P2 mouth of U11, (be P00 by P0 mouth again, P01, P02, P03, P04, P05, P06, P07 port) data (be MAX485 chip by serial port TXD end (both pins 11 of U11) by level translator 24, also be the U14 shown in Fig. 3) send to modulator 25, simultaneously, when the P20 port of the P2 of U11 mouth is after putting 1, it is high level that P20 port makes KBIT1 line, first monostable integrated package 74LS121 (being U3) is triggered, Q end (being pin 6) the output high level pulse of U3, export high level by K1 alignment modulator 25 again, after K1 line is high level, first wireless data transmission module JZ873 (being U12) of modulator 25 is opened, in running order, at this moment the serial data of U11 is by the A of U14, B port is through 485A line, 485B line is delivered to the TXD-485A of U12, RXD-485B port, U12 receives after data, carry out serial data frequency shift modulation, the high frequency frequency shift signal that solution mixes up is exported to high-frequency power amplifying circuit 26 by the AX port (being pin 10) of U12, again by two power tube Q1, the high frequency pumping of Q2 and high frequency power are amplified, radiate by emitting antenna 27, complete whole train and arrived the first monitoring of downing track of approaching station and wireless transmission of monitoring information,

As shown in Figure 4, at this moment, stand a wireless predictor 3 in Train Approaching station that orbital maintenance personnel carry at any time in the state of intercepting, the receiving wire 31 that is the wireless predictor 3 in Train Approaching station can receive " train has arrived the signal of a first approaching station downing track " that Train Approaching station monitoring feedway 2 sends over, this signal carries out a high frequency wide frequency band by radioamplifier 32 (being field-effect transistor Q1) and amplifies, the voltage that its VG is ordered is adjusted to just anti-type state, Q1 can promote 3 decibels by the high-frequency signal of receiving wire 31, logical coupling capacitance (the C1 of this signal having amplified, C2) being coupled to demoder 33 (is two wireless data transmission module JZ873 (U1 shown in Fig. 4, U2) input end), data through U1 after U2 demodulation are corresponding with the data that the modulator 25 of Train Approaching station monitoring feedway 2 is modulated, the data of this demodulation are by 6 of U1 and U2, 7, 8, 9 ends are exported to voice module 34, U1 and U2 are one group of 8 bit data (corresponding with 8 bit data of the P0 end of the microprocessor 22 (being AT89S52 chip) of Train Approaching station monitoring feedway 2) altogether, U2 is high 4, U1 is low 4, 8 bit data are equivalent to an address, at this moment when this 8 bit data is " 00000001 ", first trigger end TG (being the pin 10 of U4) that only has U4 is high level, other trigger end is low level, at this moment the voice messaging in can OPADD " 00000001 ", can to audio-frequency power amplifier 35 export in advance in " 00000001 " " staff please notes, down train first approaches, down train first approaches, down train first approaches, please note safety." voice messaging; Audio-frequency power amplifier 35 is exported corresponding voice again to loud speaker 36, at this moment maintainer can hear that " staff note that down train first approaches, and down train first approaches, and down train first approaches, and please notes safety." voice message, at once leave rail, avert danger; When train arrives other approaching station track or passes through field, station, principle of work of the present utility model and above-mentioned basic identical, repeats no more.

The utility model is not limited to above-mentioned concrete structure, as long as within having and just dropping on protection domain of the present utility model with the train forewarn system of field, the station track circuit of the basic identical structure of the utility model, Train Approaching station monitoring feedway 2 and the wireless predictor 3 in Train Approaching station and annexation thereof.

Claims

1. the train wireless alarming system that enters the station, is characterized in that: it comprises a station track circuit, Train Approaching station monitoring feedway (2) and the wireless predictor in Train Approaching station (3), a track circuit of standing comprises that an approaching station track relay and train are by station field signal relay, the coil that approaches a station track relay is connected between two rails that approach a station track, train provides the relay of signal current by station field signal relay for train by signal lamp, Train Approaching station monitoring feedway (2) comprises that train occupation approaches railway monitoring circuit (21), microprocessor (22), monostable timing device (23), level translator (24), modulator (25), high-frequency power amplifying circuit (26), emitting antenna (27) and emission power, train occupation approaches railway monitoring circuit (21) and is connected by station field signal relay with train with an approaching station track relay of a station track circuit, train occupation approaches railway monitoring circuit (21) and is also connected with one group of I/0 port of microprocessor (22), another group I/0 port of microprocessor (22) is connected with the switching value end of the I/0 port of modulator (25) by monostable timing device (23), realize the control of the on off state to modulator (25), the sending and receiving end of microprocessor (22) is connected with the transmitting-receiving port of modulator (25) by level translator (24), the wireless telecommunications end of modulator (25) is connected with emitting antenna (27) by high-frequency power amplifying circuit (26), train occupation approaches railway monitoring circuit, microprocessor (22), monostable timing device (23), level translator (24), modulator (25), high-frequency power amplifying circuit (26) is all connected with emission power, Train Approaching station is wireless, and predictor (3) comprises receiving wire (31), radioamplifier (32), demoder (33), voice module (34), audio-frequency power amplifier (35), loud speaker (36) and predictor power supply, receiving wire (31), radioamplifier (32), demoder (33), voice module (34), audio-frequency power amplifier (35) are connected successively, receiving wire (31), radioamplifier (32), demoder (33), voice module (34), audio-frequency power amplifier (35) are all connected with predictor power supply, and Train Approaching station is wireless, and predictor (3) can receive the signal from Train Approaching station monitoring feedway (2) transmitting.

2. the train according to claim 1 wireless alarming system that enters the station, is characterized in that: a described approaching station track relay comprises and approaches a station uplink path relay and approach the row track relay after the match of standing; Approach a station uplink path relay and comprise that a first approaching station uplink path relay (SJ1), second approaches station field uplink path relay (SJ2) and the 3rd and approaches a station uplink path relay (SJ3); First approaches a station uplink path relay (SJ1), second approaches between two rails that coil that a station uplink path relay (SJ2) and the 3rd approaches a station uplink path relay (SJ3) is connected to three sections of tracks that ENTRANCE place that uplink path (11) approaches field, station (12) draws near; Approach station after the match row track relay comprise that first approaches the row track relay (XJ1) of standing after the match, second and approach stand row track relay (XJ2) and the 3rd approaching row track relay (XJ3) after the match of standing after the match; First approaches the row track relay (XJ1) after the match of standing, second approaches the row track relay (XJ2) and the 3rd after the match of standing and approaches between two rails that the coil of row track relay (XJ3) after the match of standing is connected to three sections of tracks that ENTRANCE place that downing track (13) approaches field, station (12) draws near; Train comprises that by station field signal relay the up train passes through station field signal relay (XTJ) by stand field signal relay (STJ) and down train, and the up train is the relay that signal current is provided by signal lamp for the up train at station by station field signal relay (STJ); Down train is the relay that signal current is provided by signal lamp for the down train at station by station field signal relay (XTJ).

3. the train according to claim 2 wireless alarming system that enters the station, it is characterized in that: described train occupation approaches railway monitoring circuit (21) and comprises two electronic switch integrated package CD4066,8 gating circuits of two electronic switch integrated package CD4066 compositions, form 8 control end C, 8 input end IN and 8 mouth OUT, each input end IN of two electronic switch integrated package CD4066 is connected with emission power by current-limiting resistance (R17, R18, R19, R20, R21, R22, R23, R24) respectively, train occupation approaches between railway monitoring circuit (21) and the I/0 port of microprocessor (22) and is also connected with antijamming blackout, antijamming blackout is RC integrating circuit, form 8 integrating circuits by 8 pairs of resistance capacitances (C1R9, C2R10, C3R11, C4R12, C5R13, C6R14, C7R15, C8R16), every integrating circuit is connected with a control end C of electronic switch integrated package CD4066 respectively, each approaching station track relay is connected with a control end C of electronic switch integrated package CD4066 respectively by a station track relay with train, first approach the row track relay (XJ1) after the match of standing, second approaches the row track relay (XJ2) after the match of standing, the 3rd approaches the row track relay (XJ3) after the match of standing, first approaches a station uplink path relay (SJ1), second approaches a station uplink path relay (SJ2), the 3rd approaches a station uplink path relay (SJ3), down train is connected with a control end C of electronic switch integrated package CD4066 respectively by the contact of station field signal relay (STJ) with the up train by station field signal relay (XTJ).

4. the train according to claim 3 wireless alarming system that enters the station, is characterized in that: described microprocessor (22) is AT89S52 chip; The mouth OUT that train occupation approaches the electronic switch integrated package CD4066 of railway monitoring circuit (21) is connected with the P0 port of microprocessor AT89S52 chip, and eight mouth OUT of two electronic switch integrated package CD4066 are connected with eight pins (P00, P01, P02, P03, P04, P05, P06, P07) of the P0 port of microprocessor AT89S52 chip respectively.

5. the train according to claim 4 wireless alarming system that enters the station, is characterized in that: described level translator (24) is level switch module MAX485 chip; Modulator (25) comprises two wireless data transmission module JZ873, the switching value port of two wireless data transmission module JZ873 forms eight switch terminals and four sending and receiving ends, and the serial data sending and receiving end (TXD-485A, RXD-485B) of wireless data transmission module JZ873 is connected with the serial data input/output port (TXD end pin 10, RXD hold pin 11) of microprocessor AT89S52 chip by level switch module MAX485 chip; Monostable timing device (23) comprises eight monostable integrated package 74LS121; The switch terminals of wireless data transmission module JZ873 is connected with the P2 port of microprocessor AT89S52 chip by the 74LS121 chip of monostable timing device (23), and each switch terminals of wireless data transmission module JZ873 is connected with a pin of the P2 port of microprocessor by a 74LS121 chip respectively.

6. the train according to claim 5 wireless alarming system that enters the station, it is characterized in that: described high-frequency power amplifying circuit (26) comprises first order power tube (Q1) and two power tubes of second stage power tube (Q2) of common emitter, between the collecting electrode of first order power tube (Q1) and emission power, be connected with inductance T1, the collecting electrode of first order power tube (Q1) is also connected with the base stage of second stage power tube (Q2) by coupling capacitance (C22), the base stage of first order power tube (Q1) is by coupling capacitance (C20, C21) be connected with the wireless telecommunications end AX of two wireless data transmission module JZ873 respectively, on the collecting electrode of second stage power tube (Q2), be connected with emitting antenna (27) by LC resonance circuit (C26, T3), the collecting electrode of second stage power tube (Q2) is also connected with emission power by inductance (T2).

7. according to the wireless alarming system that enters the station of the train described in the arbitrary claim of claim 1 to 6, it is characterized in that: described radioamplifier (32) comprises field-effect transistor (Q1), the grid of field-effect transistor (Q1) is connected with receiving wire (31), on the grid of field-effect transistor (Q1), be also connected with the bias circuit of two resistance (R1, R3) composition, between the drain electrode of field-effect transistor (Q1) and predictor power supply, be connected with drain resistance (R2), the source electrode of field-effect transistor (Q1) is by resistance (R4) ground connection.

8. the train according to claim 7 wireless alarming system that enters the station, it is characterized in that: described demoder (33) comprises two wireless data transmission module JZ873, eight switch terminals of switching value port composition of two wireless data transmission module JZ873, the drain electrode of field-effect transistor (Q1) is connected with the wireless telecommunications end AX of two wireless data transmission module JZ873 by coupling capacitance (C1, C2) respectively.

9. the train according to claim 8 wireless alarming system that enters the station, it is characterized in that: described voice module (34) comprises two speech chip API8108A, the playback trigger end TG of two speech chip API8108A forms eight playback trigger end pins, and eight switch terminals of the switching value port of two wireless data transmission module JZ873 are connected with eight playback trigger end pins of the playback trigger end TG of two speech chip API8108A respectively.

10. the train according to claim 9 wireless alarming system that enters the station, it is characterized in that: described audio-frequency power amplifier (35) is audio-frequency power amplifier LM386, the electric current of speech chip API8108 amplifies mouth cout and is connected with the positive input IN+ of audio-frequency power amplifier LM386 by RC circuit (R9/R10, R11, C3), and the mouth VOUT of audio-frequency power amplifier LM386 is connected with loud speaker (36) by electric capacity (C5, C7).