CN1269679C - Rail communications system - Google Patents

Abstract

A method and apparatus for transmitting an information carrying signal, such as an electromagnetic frequency signal or an acoustic signal, through the tracks of a railroad to a remote position on the track where the information is extracted. The extracted information can be used to relate speed and location of trains, location of obstructions, and/or track conditions. The <i>in situ</i> track (10) is evaluated using an autoranging digital multimeter which establishes the resistance between two opposite rails (12, 14).

Description

Railroad Communication System

Background of invention

The present invention relates to transmit along the information of rail.

Conventional along between the station or train comprise conventional radio-frequency transmissions or complicated satellite communication with communicating by letter of rail between the station.Each of these systems requires Direction Center, repeater station and other signal intensifiers that unbroken information is provided.Conventional radio transmission has not only by ambient interference and the caused intrinsic difficulty of blackout, but also has by passing through tunnel when train or losing the caused intrinsic difficulty of communicating by letter with train during some area.

Previous characteristics of attempting utilizing rail are used for generation information or be used to and relate to communication between the section of electrical applications of pulse or modulation format, wherein, the information of signal is transmitted as the function of the relay system of placing along railway every a segment distance (relay system) or along need be with the function of the interruption of the constant signal of the short railway that monitors at interval.

U.S. Patent No. 1,517,549 use an electrical radio-frequency signal, because its is eliminated very forward and is not regarded as a kind of information relevant with train of danger.This high frequency is because high attenuation characteristic has limited this signal.

Authorize the U.S. Patent No. 3 of LaForest, 715,669 use a receptor, be used for frequency modulation and cover track circuit, wherein element such as relay cond and resistance are connected to track and its operation that relies on Train wheel and block the shunt of the signal of projector by use and interrupt the electric signal that generates by track.

The U.S. Patent No. 3,984,073 of authorizing the U.S. Patent No. 3,949,959 of Rhoton and authorizing people such as Wood relates to the aerial installation of the sound signal relevant with or other vehicle rails that be used to be coupled.Add voltage to vehicle rail.This system relates to sonic detection.

The U.S. Patent No. 4,369,942 of authorizing Wilson is a signal communication system, uses to comprise that the generation electric current of insulated track meshes a railway line crossbar signal carrier system.Low-voltage current starts or responds to this signal.

The other forms of communication of proposing comprises and utilizes wave guide principles that wherein with reference to the U.S. Patent No. 4,207,569 of Myers, " waveguide " served as in bottom track bed and mobile train.

The other form that transmits comprises the transponder system of the U.S. Patent No. 4,932,614 of utilizing Birken, wherein track current be established in case by along separate routes or short circuit do not hold in rail portion and finish a loop.

Authorize people's such as Laurent U.S. Patent No. 442,998 by railway transmission information, it has the transit area of resonance circuit by use, this resonance circuit be tuned to by the carrier frequency of the signal of the galvanic circle emission of not two inter-railways of the track of end that are placed on each section or zone.This system uses CW transmission so that detection information rather than transmit information to the another location from a position.

The shortcoming of these systems be they only can be used for interruption that short range or their rely on signal with generation information or signal itself represent to suffer when relate to track real apart from the time the information of the problem relevant with decay and noise.

Summary of the invention

The present invention overcomes prior art problems by being provided for transmitting with reception information or the general improved method and apparatus of communicating by letter, and does not comprise but not and be confined to position, speed and direction, operator and the other staff of railway traffic.

An object of the present invention is to allow to utilize the existing railway system to be used for the transmission of carrying out information and the reception that various signals comprise radio frequency, sound and lightwave system as transmitting and receive media.

The present invention realizes its purpose by the railway track that use is installed in the routine on the railroad tie.These rails are electrically connected to the track of each continuous length by conductive cable or solid welding.Railway equipment uses the flanged steel wheel that rolls on rail to cross rail.The invention provides by suitable tuning inductor or wheel and directly in rail, transmit and received signal.Turn back to this equipment by wheel, tuning inductor or other suitable conductive medium from the transmission signal that rail receives.In addition, various electromagnetic induction or transmission equipment can be used in track near.Current federal rule is forbidden except that wheel in any part of this equipment being installed aboard near the place of railway 2.5 inches (6.35cm).

Another object of the present invention is to avoid not meeting the rule that FCC (Federal Communications Committee) forbids radio or other frequency interferences, provide simultaneously when by with walk around natural or man-made structures failure-free is not ruined when transmitting information communicates by letter.

Another object of the present invention provides a system that uses rail, this system sends signal to train or equipment operator or dispatcher or other regionalities or national communication control personnel, and allow the user to determine the contiguous situation of this equipment, comprise speed, track, position and the direction of advancing.

Other favourable aspect of the present invention be its detect track itself unusually, the ability of defective or discountinuity.This is owing to realize by track transmission and received signal.The signal of sort signal or reflection must be by unusual, defective or continuous being changed so that they can be compared with the data bank of exception record that is got by test or the sampling of taking out from the orbital region with already present defective, or be that normal condition range is compared or compared with both with being considered in the existing railway system.

Purpose of the present invention realizes by the method that the railway equipment (as railway line or catenary (cantenary)) by rail or other conductivity transmits information, and this information transmits the primary importance place that is included on track or the conductor and introduces and comprise the signal of this information and to send the detection of the signal that comprises this information of second remote position to by railway or other conductors.Then, extract this information from detection signal.

Purpose of the present invention further realizes by a device, and this device uses a signal source to transmit information by rail, and this signal source outputs to coded information signal in one or two of rail.The receptor of long-range installation detects the code signal that transmits by track then from this signal extraction information.

Another object of the present invention provides a kind of method that transmits information, and it is incorporated in the rail by the radiofrequency signal that will comprise this information in primary importance, and detects this signal in the second place subsequently, and the second place is away from the position of this signal being introduced rail.This information is extracted and is analyzed from the radiofrequency signal that transmits then.Another object of the present invention provides by the audible signal that will comprise this information and is incorporated into the method for coming the information that transmits by rail at the rail of primary importance.At remote location, the acoustical signal that transmits by rail is detected and extract this information from the acoustical signal that transmits and handle then.

According to other method of the present invention, obtain by detecting with many sound signals apart from the far position of special audio signal source as a kind of specific information of the signal that transmits along rail of special, common form known.Subsequently, many signals of detection are analyzed and this special audio separation of signals come out.Handle this special audio signal then so that this specific information to be provided.

Other purposes of the present invention, advantage and new feature will from below with reference to accompanying drawing to becoming clear the detailed description of the invention.

The accompanying drawing summary

Fig. 1 is the scheme drawing of explanation according to radiofrequency signal transfer approach of the present invention;

Fig. 2 is the scheme drawing that the effect of method as shown in Figure 1 is described when considering the by-passing of train or other mobile device wheel shafts.

Fig. 2 a is to use the explanation scheme drawing of the effect of single track transfer approach, and wherein the chassis of train is used as a relative ground that communicates with the ground rail on opposite;

Fig. 3 be to use the lengths of rail with railway carriage method schematically illustrate figure;

Fig. 4 is the instruction diagram according to sound signal transfer approach of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED

Fig. 1 illustrates and uses 140 pounds of welded rails of 1 mile long main line 10 as transmitting media.Use the automatic ranging digital multimeter to calculate the value of track 10 in the original place, the resistance that this multi-meter is provided with 12,14 on two relative rails is about 3.5ohm.Alternating-current voltage/AC voltage difference measurements between the subtend rail is only represented the normal background voltage transient,, no matter whether volt meter is connected on the rail, does not all have difference in measured voltage that is.In a like fashion, the D.C. voltage difference is measured as and is essentially 0.The copper ground rod be inserted in the soil about 15 inches to calculate voltage difference with respect to each track on ground.Each track dc voltage measured with respect to ground is approximately 1 volt.

Then, each of 14 gauge non-conductive twisted copper wires 21,22 of about 15 feet length of two equal lengths is not held each that is electrically connected to locomotive wheel rims 23,24 two steel, 14 inches one.Copper cash relatively not end be connected to the dipole end of positive and negative of 194.5Khz AM (L.F.), 500nW projector, this projector utilizes 30Khz FM subcarrier to transmit to be considered to have the CYBERNET of the actv. horsepower output of about 200mW of 100% modulation when 1kHz, the audio frequency (stereo) of TM301 type (FCC ID#AWQ9SBTM-301).This is to determine for Wavetek audio-frequency generator, the 112B type of the line level input of Cybemet TM-301 by the tone that is used to provide 1kHz that the sinewave output of using to standard is provided with.Adjust the audio gain of TM-301 then so that modulation LED is in " ON " state of stable expression 100% modulation.Measure RF power output then by the Cybernet TM-301 of positive and negative dipole antenna terminal.

Prepare to be connected to from the steel automotive rim on the lead of projector to allow the maximum conductivity between connection lead, wheel rim and track for a train by from inside face and wiring film perforation, removing all paint and corrosion.Wheel rim 23,24 is placed in orbit in relative mode so that simulate two train wheels at a track in vertical direction.

Use music program source of information 40 to modulate Cybernet projector 30 so that determine effective transmission scope with the receptor receiver 50 of coupling.The receptor receiver is the portable receiver receiver with automatic noise suppression of Cybernet type HTWL38.

Receptor 50 is away from transfer source (wheel is placed on the track herein).Locate beginning at about 50 yards, have detectable decay by the indicated RF signal of place, the whole fixed position noise suppression that gets in automatic noise suppression characteristics by receptor.Yet this signal is clearly being distinguished away from 1.5 feet the place that is not bordering on rail 1 mile of transfer source, that monitored.Because the power of test emitter output is basically less than a half-watt (200mW), obviously the projector that has a higher horsepower output by use under identical condition can obtain longer transmission distance easily.

For consider the electricity consumption situation of the variation that exists in the Railway Environment of the performance that comprises train itself, the system of Fig. 2 is used to use with similar lead ladder bonded assembly particle size copper cash 26 with " crosspiece " 27 of simulated fire axletree and carries out various experiments.Although 42 reduce each continuous shunt that the RF signal gets from the source, the original signal that is detected by receptor 52 is repeatedly also having residue after the shunt.This test is because the characteristic of modern train axle is implemented, and the wheel of each on same solid wherein, conductivity wheel shaft serve as one along separate routes or short circuit.

About accurate situation along the long train of the continuous length of track operation, higher through-put power negate the effect of these " along separate routes " be obviously.Yet, recently find to introduce that the RF signal of railcar body is not only two-way is sent in the rail but also any compartment that is sent to railcar body and is connected thereto by further test.In addition, cause unacceptable signal attenuation along separate routes even the situation of worst shows, this signal can transmit to overcome this problem from the two ends of train.This can realize by utilizing train line (the straight line flexible pipe of standard is connected to start the brake system of train between locomotive and compartment).Train line (gladhand) is connected to the continuous fax lead that moves of the whole length along train in each compartment by conduction " can get loose ".This is to realize by the wire netting element of the enhancing of guaranteeing flexible pipe and the continuity of coupling thereof.In other words, utilize suitable coupling device (damaging transmission equipment for preventing high potential), catenary or the 3rd rail also can be used to transmit signal.

Except that these peripheral issues, two tracks of first wheel shaft (check point) by the train that arrives or leave be the application's a favourable aspect along separate routes, because it provides one closed circuit " antenna ", in fact this closed antenna has improved signal strength provides valuable signal phasing information simultaneously, when several trains be positioned at identical near the time, this just seems very important.

In addition, single lead " antenna " (or transmission line) track that is used to transmit equally also can be worked well, shown in Fig. 2 a.The cathode terminal 61 of antenna dipole is connected to that ground rod 63 and anode tap 65 are connected in the straight line of projector 60 operation and in the insulation twisted copper wires 68 of 8 gauges of 1000 feet of far-end connected to chassiss.The music program source is easy to detect by receptor 70 at far-end.This situation can be connected to the chassis of train by the ground terminal with projector and simulate on a train, and this train chassis links to each other with its metallic wheel, and makes each rail ground connection with the interval of routine.This require to use the inductor of isolating with the train chassis or wheel to respond to or to be received in signal on the relative rail.

The variation that Fig. 3 illustrates the other test of before having mentioned and comprises the test of the rail railway communication partly that is taken by locomotive, compartment and guard's van.Using the test section of tracking apparatus to be used to give prominence to the function that is being lower than this method under the ideal conditions under the very arduous condition.The guard's van 39 that the length of the railway of describing in Fig. 3 comprises adessive 35 and has the compartment 36 of 10 dissimilar and length.Track section ground is connected with bolt and binding (not welding) and is connected on the wooden crossties with representative type gravel aspect.Be used for that a plurality of bolts of fastening track are lost and get on the right track separated and reach six inches highway section breaking down at these points.Compartment and wheel and track demonstrate great getting rusty on outside face and coupler.

Be based upon employed identical test equipment in Fig. 1 structure.Be connected to forwarder at the suitable locative front-wheel in point of connection place by 14 many twisted cables of gauge.The diameter about 3/16 that bores near radial bearing " aperture selected as the signal decanting point.Obtain this hole by breaking its inside into pieces with a little dull and stereotyped screwdriver.Therefore, the naked end of 14 diameter lines is inserted in this hole.Primary screw put just be electrically connected on the wheel guaranteeing thereafter.Several districts of wheel, wheel shaft and track are broken into pieces and resistance are tested.Resistance is actually 0ohms.The left side of locomotive and off front wheel are prepared in the same manner.This experiment on the other hand in, the antenna of drawing from projector be connected to the chassis by the zone of the naked iron and steel of scrappy one-tenth away from the train body of wheel.

Through radial bearing, with the signal of introducing in two front-wheels of locomotive, sound signal can directly be distinguished in orbit and away from the coupler neutralization of locomotive between the two.Track between car body horizontal surface, two rails and two rails does not hold this signal to decay slightly but can distinguish.In experiment, wherein the RF signal is introduced into the railcar body on the wheel, and signal is decayed at place, about the 7th compartment with higher coupling level but still can be distinguished on the rail that moves to guard's van.With the signal of introducing a wheel and by enter in the ground 2.5 ' the other end of three feet copper pipe connected to chassis antenna dipole, obtain to test identical result when time on the radial bearing that is directly connected to wheel with first.Yet it is a bit too strong that this signal seems.The loss of pointing out before not in the 7th compartment.Be connected to the lead-in wire of locomotive chassis with mono-, obtain identical result once more.With regard to all situations, this signal is disperseed when laterally leaving train and rail.

As if the method for the LF signal being introduced rail and/or train not crucial.The test status of this equipment and track represents not have the operation railway more disadvantageous situation will occur.As if disturbing can not appear in electricity along separate routes that caused by be electrically connected continuous wheel and axle because this signal itself advances and so do not hold at train and to introduce track again along the train body probably.This method can be used to communicate by letter in the transmission train on different subcarriers.In addition, if the desired airline that is used for the air-lock operation conducts electricity on each compartment,, acquisition is run through the electrical connection of the unanimity of train length by the wire netting flexible pipe that uses as be electrically connected continuous.

For considering that track surpasses 10 miles extended length, the instrument most probable at the binding site place requires extra wattage.Be tuned to about 100 watts horsepower output of RF test frequency should be enough.For this a kind of wattage product, can use the linear amplifier of superpower such as (amplifier research) model 100L of the minimum output power AR that has 100 watts of CW at 10KHz during to the work of 220KHz scope and in maximum gain.The measurement of amplifier output power is realized by directional coupler, HP power meter and coaxial load.Coupler is at the Werlatone type C1460 of 10KHz to 250KHz frequency limit work.Coaxial load is the Bird type 8201 of work from DC to 1000Mhz.The coupler port decision is sent to power in the load with the observed reading of reflective power forward.The AR amplifier can and can be lower than range mode and drives at the HP type 8656A producer that is being lower than 10KHz work by work from 100KHz to 990KHz with a kind of.This 8656A producer is modulated and have can be at 25Hz to external modulation input modulated between 25Khz at 400Hz or 1000Hz.The inner modulation of this 4000Hz can be simultaneously operated or as comprising the hybrid modulation of AM-AM, FM-FM or AM-FM.

Coalignment at the receiving position place comprises the Fairchild type ALR-25 loop antenna that has 18 inch diameters and be used for the disposable matching network of direct frequency band.The signal that this loop antenna arrives the 30MHz range operation and receives with maximization in the test position orientation at 10KHz.From this loop antenna, output with feed-in such as Eaton EMI field intensity meter in the NM-7A type of the 0-50KHz of frequency bandwidth range operation with 10HZ, 100HZ, 1KHZ, 20KHZ and 50KHZ.This instrument has can be from the coaxial input of BNC of AC power or chargeable battery operation internally.

About the connection of input end, the AR amplifier has unbalanced coaxial output.Ideally, the balance tuner is connected to the output of amplifier so that this signal can be matched in the rail.The balance tuner has coaxial input and balance output.As a kind of selection, do not having to use balance one balun under the situation of matching network because the AR amplifier is designed to the harmless operation with high VSWR.In this environment, requirement can also can be handled the balanced-to-unbalanced transformer of 200-500 watt in the 30-300KHz range operation.

As a kind of selection to the balance output intent, single rail can be loaded the coaxial output with connected to chassis screened cable.Loop antenna with ground lead is used for receiving.This single track configuration has than low resistance so that the coupling that does not have balun to be provided.

By wheel be installed to car body or other track equipments on rail in other changers ripple transmission and receive and can directly pick up by other car bodies or track equipment or by fixing or portable receiver or control center by railway.This signal can use the information of directly being imported by railway servant or other party concerneies to encode.This information encoded can by on the train body or other equipment of remote location transmit and pick up.Therefore, any mobile or fixing train can transmission with speed, direction, position and distance and other the information-related information in this signal of can being encoded into to other car bodies or receptor.Numeral or the simulation (as audio frequency) and can be of this coded message by the another kind of equipment on the car body or in computing machine or the conversion of audio wireless photodetector away from the position of railway.This information from or with train on or other equipment on the track or under the track, such as data logger, shake measurement equipment, geography/GPS is shared.

The transmission of rf wave is optimum aspect of the present invention.Several radio frequencies that are not considered to be applicable to by railway the transmission that does not conflict with the existing radio communication generation of being controlled by Federal Communications Committee (FCC) are arranged.In addition, these frequencies can transmit and receive and not have the significant loss of signal strength and do not have the environmental hazard of appearance to people or wild animals and plants along the long relatively distance of railway.(ultra-low frequency,＜3Hz) signal is particularly suitable for this Railroad Communication System for LF (low frequency, 30KHz to 300KHz), VLF (lower frequency, 3KHz to 30KHz), ELF (extremely low frequency, 3Hz to 3KHz) and ULF.The antenna loading characteristic that these low frequencies, long wavelength's radio frequency are used for the very desirable because railway of railway, catenary or similar power transit line (transmission line of the infinitely great length of actv.) help with the long wavelength use because since " antenna " unmatched attenuation problem be minimized.In addition, the result can accept standing-wave ratio (SWR) (SWRs) thereby minimizing some a source emittance leaks.This Railroad Communication System is provided at the safe biotype environment near railway.In fact because the wave propagation characteristic of these low frequencies and the level and the parallel construction of railway, also be minimized in radiation away from the RF signal of the distance of railway.In addition, the lowermost portion radio frequency in this frequency has very little commercial value.Because the high frequency band harmonic wave can not produce enough signal strengties and disturb modern reception facilities, thereby very little with the collision chance of commercial radio frequency.

Because the characteristic of radio frequency electromagnetic, the embedding information in numeral or analog format can or be passed through frequency modulation (FM) ripple and transmit with ripple or its side-band.For example, can transmit through the RF Carrier from the relatively accurate location information that is positioned at existing traditional global positioning system (GPS) equipment on each train.In addition, come the train in workman, the accident freely, the information that is in train in the zone of " can not communicate by letter " or the like participant can be used to and other trains contact or the railway equipments that de-orbit.This system can be used as legacy communications system, calibration package, main line level circuit crossbar signal machine, actual trains control system, shipment tracking system or realizes as the commerce services that is used for freight charges.

Owing to the wave form varies that the interference in the rail of the transmission ripple of these low frequency system or resistance are produced, the physical property of railway itself can be detected.The transmission or the waveform of reflected signal, phase place, amplitude and interrupt in difference be used to provide with the state of railway or be positioned at the relevant internal information of speed of the mobile transmitter on the railway.The state of railway or can improve by increase in conjunction with the sound signal of RF composition calibration near the detection of the speed of equipment.In addition, less important HF or UHF signal can be used as a reference value and with the unnecessary signalling apparatus of main low frequency railway signal.As long as high and low frequency is shared to have same clock altogether, the little difference of wave phase in regularly is by using the comparator can be detected because two signals with about identical speed (at clearance envelope 3 * 10 ⁸M/sec, somewhat low, but still be predictable speed by rail) propagate.The phase analysis of any signal that directly receives or reflect from the train that transmits can be used to detect the state of railway.This phase analysis is realized by phase place anacom software.

Because the characteristic of radio frequency, may be synchronously from a position to another position transmit information and provide with two sources between the relevant extraneous information of track condition.That is, radio frequency can be with the necessary information demodulation in advance that is sent to the second place from primary importance.Because it transmits along railway, because the variation in waveform or the envelope can detect above-mentioned physical property.But these difference phase places, amplitude or interruption.Therefore, in the second place, have the ability not only to remove specific information and the capable physical property of determining railway between two positions that sends from primary importance.In an example of simplifying, the radiofrequency signal of modulating with information A can be sent out.Usually, in the track condition of the best, owing to the distance between two positions, the information that receives at second place place has the amplitude or the signal level of determined value.On the other hand, if a loss is arranged in track condition, signal level can be quite low and has different phase places.The raw information that sends from primary importance still can be determined, but the characteristic of the received signal the information that comprises in received signal will provide the other information that comprises track condition.

The scheduling of this communication system in the railway system of operation also will provide relevant valuable information near train, otherwise these information are difficult to use other technologies to detect.For example, the RF signal can be sent to the right side (relevant with each train) of railway so that whether approachingly with another train from the front and back on the same rail determine the train that arrives.Alternatively, can adopt convention to represent from 0 to spend, on a frequency, send and, spend the train of advancing from 181, send in another frequency to 360 degree with respect to positive north or magnetic north to the 180 degree mobile trains of advancing.Because this system uses railway as its transmission medium, may be special different information only therefore.By comparing, the global positioning system of two trains (GPS) can indicate that train positive mutual connection is near, yet, there is not quite high resolution, usually be difficult to use with the gps system of commercial use, whether the train that this method only can not be distinguished every several feet is on identical or adjacent track.

Automatic or manual operation transmissions/receiving element can be installed in different kinds of railways crossing, bridge and communicate by letter or the other senior warning of visible light or infrared video detection or the warning that the sound nearby device is used for potential obstacle to provide such as emergency speech with the crossing of railway.This system can be used to serve as redundant safety system starting the high speed railway warning system, or is used to replace existing, high maintenance level circuit cross system.

Except that radio frequency, rail is good acoustic emitter.Find that already sound can be detected by the railway system from far distance.The active computer technology can digitalisation and the sound of analyzing by the railway transmission.Therefore, use audible signal (being sound wave) be used to detect just approaching train, be a kind of feasible method along the fixedly moving obstacle of track and/or the railway that fault of construction is arranged on the given length rail.Can be along the sound transmission of track passive or initiatively take place by train or the equipment on this train of being installed in.

By by being connected with railway or allowing to generate distinguishing of sound naturally by railway or other objects of linking to each other with this railway near the passive digitalisation that the sound that the microphone of railway or optical detection system detect generates.These digitized sound are by comparing by computerized algorithm, usefulness or need not separating with the phase relation, frequency, frequency deviation and the amplitude that are stored in all the detection sound directly relatively handled in the digital sample and other sound on same rail.Can detect the defective in the railway or the interrupted part of railway with identical method.In other words, may be to the variety of event that in normal or upset operation, takes place along rail or the relevant sound scheduling of state so that the different data bank that can be used to determine possible unsafe condition be provided.

Another kind is used for comprising the railway that effectively is incorporated into normalized frequency or continuous or pulse sound at interval in the method for the use of railway communication sound, usually not relevant with normal railway sound, serve as the similar SONAR signal of can be detected and analyzing in sizable distance.Because this active signal is standardized, its inherent characteristic is known, therefore any difference in the signal that is received be considered to cross equipment on railway or the railway or object motion, lack the result of motion and be the characteristic of railway itself.

Fig. 4 shows from the introducing that 82 sound is arranged in a steady stream by existing railway 83,84.Source 80 can be mounted in or link wheel 82,83 or be placed directly on the resonance inductor on the track, can produce the oscillator/amplifier of required acoustic signals with all train speeds.Under current Routine Management guide, equipment is placed on and is higher than 2.5 inches on track or allow more.Receiving the active sound wave signal can maybe can use the wheel such as the optical device of the reflection coherent light of laser to take place by microphone apparatus 91 is installed.This detection directly takes place on the railway surface.The correction that is used for the proper motion relevant with the train that starts be by use the optical clear loop is housed, extremely sensitive, the phase place coupled motions check implement that are placed directly on the path of control laser beam of transmission realize.Information from this equipment is fed in computing machine or other signal processors 94 together with next information since the reflection lasering beam that track gets, and the information from reflection lasering beam is used to be provided for compensating the hunt effect relevant with source laser with mobile train and/or the control information of vibration then.

As described in realizing as above-mentioned relevant radio frequency, the right side rail (with respect to train) that the active sound source that is incorporated into the railway system can only be introduced in train is to be provided on the same track and identification immediately at the relative train that moves towards each other of advancing of equidirectional.In addition, can adopt a convention, this convention regulation is spent the mobile train of advancing to 180 degree from 0 and is transmitted and spend the train of advancing to 360 degree with respect to earth magnetism or positive north from 181 and transmit in another frequency a frequency.

Above-mentioned explanation only is used to illustrate the present invention, is not to be used for limiting.Because change to the disclosed embodiment that comprises spirit of the present invention and essence can take place to one skilled in the art, the present invention may be interpreted as the scope that is included in additional claim and the everything in the equivalence thereof.

Claims (30)

1, by the method for rail transfer information data, comprise step:

The radiofrequency signal that will comprise described information data in primary importance is incorporated in the described rail;

The described radiofrequency signal that comprises described information data is detected at second place place away from described primary importance on described rail, and this radiofrequency signal transmits by the described rail between described first and second positions; And

Extract described information data and analyze described information data from described detection radiofrequency signal.

2, the method for claim 1 comprises that further characteristic and the predetermined properties with the radiofrequency signal of described detection compares so that be provided at the step of the additional information that is obtained by described radiofrequency signal between transmission period between described first and second positions.

3, the method for claim 1, the wherein said second place is fixed with respect to primary importance.

4, the method for claim 1, at least one in wherein said first and second positions moves with respect to described rail.

5, the method for claim 1 is the position of the train speed in described primary importance, described primary importance and at least one from the information that the 3rd position receives of described primary importance from the described information data of the radiofrequency signal of described detection wherein.

6, method as claimed in claim 2, wherein said additional information are the track condition information between described first and second positions.

7, the method for claim 1, wherein said radiofrequency signal are the LF signals with the horsepower output that is lower than 1/2 watt, and the distance between wherein said first and second positions is about 1 mile.

8, the method for claim 1, wherein the step of radiofrequency signal being introduced described rail in primary importance comprises the step in each bar rail of described radiofrequency signal being introduced described rail.

9, the method for claim 1, the step of wherein radiofrequency signal being introduced described rail comprise introduces one step in two rails of described rail with described radiofrequency signal.

10, the method for claim 1, wherein said primary importance comprise that railway carriage and the radiofrequency signal that wherein will comprise described information data in primary importance introduce the step of described rail and comprise that the described radiofrequency signal that will comprise described information data simultaneously introduces described railway carriage and propagate the step of described radiofrequency signal along the length in described compartment.

11, a kind of method that detects the information relevant with the described rail between the primary importance on the rail and the second place comprises step:

To transmit modulated radio signal in described primary importance is incorporated in the described rail;

Described receiving position away from described position on described rail detects the reception modulated radio signal, and described modulated radio signal transmits by the described rail between the described primary importance and the second place;

With the described characteristic of the reception request radiofrequency signal of described detection and the predetermined properties of described transmission modulated radio signal compare with provide and described first and second positions between the relevant described information of described rail.

12, method as claimed in claim 11, the wherein said second place is fixed with respect to primary importance.

13, method as claimed in claim 11, at least one in wherein said first and second positions moves with respect to described rail.

14, method as claimed in claim 11, the described transmission modulated radio signal that wherein is incorporated in the described rail comprises that the described step of information data and wherein more described detection received signal comprises the step of extracting described information data from the received RF signal of described detection.

15, a kind of method by rail transmission information comprises step:

The modulated radio signal that will have acoustic information in primary importance is incorporated in the described rail;

The second place away from described primary importance on described rail detects the described radiofrequency signal that comprises described acoustic information, and this radiofrequency signal transmits by the described rail between the described primary importance and the second place;

Extract described acoustic information and handle described acoustic information from described detection radiofrequency signal.

16, method as claimed in claim 15, wherein said aud. snl. is an audible signal.

17, method as claimed in claim 15, the wherein said second place is fixed with respect to described primary importance.

18, method as claimed in claim 15, at least one in wherein said first and second positions moves with respect to described rail.

19, method as claimed in claim 15, wherein said radiofrequency signal are the LF signals.

20, a kind of device that is used for the information that transmits by rail comprises:

One signal source, output has the radiofrequency signal of the modulated carrier that comprises described information;

Interface arrangement is used for described output with described signal source and is connected at least one rail at the described rail of primary importance;

One receptor, detection sends to described modulated radio signal away from the second place of described primary importance by described at least one rail from described primary importance, and wherein said receptor further comprises the device that is used for extracting from described detection radiofrequency signal described information.

21, device as claimed in claim 20, the wherein said second place is fixed with respect to described primary importance.

22, device as claimed in claim 20, at least one in wherein said first and second positions moves with respect to described rail.

23, device as claimed in claim 20, wherein said radiofrequency signal are the LF signals.

24, a kind of detection along the method for the radiofrequency signal that comprises customizing messages of rail transmission comprises step:

Away from a plurality of signals of the position probing of described radio-frequency signal source;

Analyze the signal of described a plurality of detections and export described radiofrequency signal;

Handle described radiofrequency signal so that described customizing messages to be provided.

25, method as claimed in claim 24, wherein said a plurality of signals comprise sound and external radiofrequency signal.

26, a kind of method of checking track condition comprises step:

Radiofrequency signal is introduced in the described rail in primary importance;

The radiofrequency signal of detection of reflected, the radiofrequency signal of wherein said reflection are included in described first radiofrequency signal after the second place reflection on the described rail;

The characteristic of the radiofrequency signal of described detection and the predetermined properties of described first signal are compared to determine the track status information between the described primary importance and the described second place.

27, the method for claim 1, wherein said radiofrequency signal are the LF signals.

28, the method for claim 1, wherein said radiofrequency signal are the VLF signals.

29, method as claimed in claim 15, wherein said radiofrequency signal are the VLF signals.

30, device as claimed in claim 20, wherein said radiofrequency signal are the VLF signals.

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