CN1994800A - Method and system for realizing train positioning and real-time tracking by using leakage coaxial cable - Google Patents
Method and system for realizing train positioning and real-time tracking by using leakage coaxial cable Download PDFInfo
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Abstract
The invention relates to a method for positioning and real-time tracking train via leakage coaxial optical cable system, wherein it is formed by five inventions, as dual-wire strengthen inner conductor E-shaped groove outer conductor leakage coaxial optical cable, leakage coaxial cable carrier antenna, optical-electric convert emission receiver, train positioning instructing system, and carrier digit information processor. When train receives accurate position signal, the electric map marks the position of train, to calculate out the speed and accelerator of train; the center receives the real-time information of each train, to real-time display accurate position, speed and accelerator at the electric map; computer via said information calculates out best train line, and sends relative command to the train; train receives command to operate.
Description
Technical field
The present invention realizes the method and system of train positioning and real-time tracing for adopting leakage coaxial cable, belongs to rail vehicle-ground communication and train real-time tracing technical field, is specially adapted to high speed railway car-ground communication and train real-time tracing technical field.
Background technology
The high speed train section has only Japan to adopt leakage coaxial to realize car-ground communication in the world at present, the radius of the leakage coaxial that Japan is adopted is " eight " font, its coupling loss fluctuation is up to 20dB, simultaneously owing in leaking cable, do not have optical fiber bundle tubes, can not constitute the car-earth communication system in the stable broadband of opto-electronic conversion, the utilized bandwidth of total system is less than 1MHz, can not transmit the function of accurate location of high speed train and real-time tracing, and the vehicle-borne antenna that transmits and receives all is open antenna, the interference that will generate an electromagnetic field to external world of vehicle-borne emission coefficient, vehicle-borne receiving system also is subjected to the interference of external electromagnetic ripple easily.Car-earth communication system is related to the safety of driving, as is subjected to adding interference, will increase error code, even makes the driving instruction produce mistake.Especially in the eventuality, the enemy is easy to utilize numerous radio station that the car-earth communication system of train traffic control is attacked in area far away, causes the paralysis of car-ground driving system.This just need develop that coupling loss is reliable and stable, the leaky waveguide optical cable with photoelectric converting function that can the wide band train information of longer Distance Transmission and the vehicle-mounted and emitting antenna of being made by vertical fluting leakage coaxial, to form train or the accurate location of high speed train and the method for real-time tracing.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of method and system that adopt leakage coaxial cable to realize train positioning and real-time tracing.
The technical solution adopted for the present invention to solve the technical problems is: a kind of employing leakage coaxial cable is realized train positioning and real time tracing system, comprises the electronic three-dimensional map that Car antnna, light-to-current inversion sending/receiving module, train positioning and command echelon terminal, vehicle-mounted digital information processing system that double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, leaky coaxial cable are made are unified Wideband RF Amplifier, filter, high speed data processing terminal, formulated according to track curvature radius and roadbed situation.
Adopt double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, comprised the leakage coaxial inner wire, this inner wire by both sides contain strengthen steel wire the plastics blank pipe as the mechanical strength supporter, in this blank pipe, has the multi-fiber fiber optic beam tube, outside inner wire, physic foaming insulation layer is arranged, vertical bag rolls on insulating barrier the periodically copper strips of positive and negative " E " shape radius, form the outer conductor of leakage coaxial, extrusion molding outer jacket on the outer conductor.
The Car antnna that leaky coaxial cable is made, structure are to utilize the short-circuit line of n λ/4 of the vertical elongated slot leakage coaxial of outer conductor as the antenna that transmits and receives of onboard system.Wherein n be 1,3,5,7,9,11,13, the odd number of 15......, λ is respectively the electromagnetic wavelength of vehicle-mounted transmitting antenna or receiving wire.The antenna terminal internal and external conductor adopts diameter and the vertically consistent copper sheet sealing short circuit of elongated slot leakage coaxial outer conductor diameter, and the top internal and external conductor connects the internal and external conductor of feeder line respectively.
The light-to-current inversion sending/receiving module has utilized the fibre bundle in the leakage coaxial cable, constitute light-to-current inversion and sent the reception structure, the filter and the power divider that contain fiber optic modulator of closing ripple and channel-splitting filter, light and detector, high-power high-frequency amplifier, electricity in the structure adopt frequency in 800～900MHz or the 400～450MHz scope as the leakage coaxial frequency of operation.
Electronic three-dimensional map, high speed data processing and display terminal, the vehicle-mounted antenna that transmits and receives that the vehicle-mounted digital information handling system contains the amplifier of modulating system, the high-frequency wideband electricity of filter, the QPSK electricity of electricity, formulates according to track curvature radius and roadbed situation.
The terminal of train positioning and command echelon contains the amplifier, high speed data processing terminal of modulating system that optical fiber transmits and receives filter, the QPSK electricity of module, electricity, high-frequency wideband electricity, the electronic three-dimensional map of formulating according to track curvature radius and roadbed situation, the decision structure and the driving instruction of optimization driving running chart send system.
A kind of method that adopts leakage coaxial cable to realize train positioning and real-time tracing, core concept is as follows:
When Car antnna receives corresponding accurately location position signal, on electronic three-dimensional map, will clearly mark the accurate position at locomotive place, also can accurately calculate locomotive real-world operation speed and acceleration/accel.Command centre receives the real time information that every train sends like this, just can be at the accurate calibration position, running velocity and the acceleration/accel that demonstrate every time train place in whole scheduling interval on the electronic chart in real time.Computing machine is according to the information of this electronic chart stored data and each train of receiving in real time, calculate best train diagram rapidly, and send corresponding driving to each time train and instruct, and after train receives driving instruction, handle train by instruction and quicken, slow down even brake, Here it is train that the present invention realized or high speed train be the method for location and real-time tracing accurately.
The invention has the beneficial effects as follows:
Coupling performance between this antenna and leakage coaxial is reliable and stable, make the Car antnna receiving system externally come electromagnetic interference to have very high defend degree, vehicle-mounted system of transmit antennas field intensity increases and decay rapidly with distance, has very big social benefit and economic benefit.
Utilize the leakage coaxial cable system to realize the method for train positioning and real-time tracing, can be used on magnetic-levitation train car one earth communication system of speed per hour up to 430 kilometers, the coupling efficiency of leakage coaxial is fine, and reliable and stable.And in the scope of leakage coaxial 1km, not having error code fully, two leakage coaxial places produce " accurately location position signal " about power divider connects, and see accompanying drawing 9,10,11.
Utilize the leakage coaxial cable system to realize the method for train positioning and real-time tracing, can be used in the high speed train system.
Utilize the leakage coaxial cable system to realize the method for train positioning and real-time tracing, can be used in the underground railway track traffic system, can shorten the subway running interval.Pekinese's subway running interval is the shortest at present is 3 minutes and 30 seconds, average out to 8 minutes, and subway running interval in various countries' was generally 1 minute and 30 seconds in the world.Can reach 1 minute and 30 seconds after adopting native system, reach world-class levels, be that the Olympic Games in 08 year contribute.
Description of drawings
Fig. 1 is double-steel-wire reinforced inner conductor compound copper-plastics band structural representation.
Fig. 2 is double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable outer conductor structural representation.
Fig. 3 is double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable structural representation.
The Car antnna structural representation that Fig. 4 makes for leaky coaxial cable.
Fig. 5 is a light-to-current inversion sending/receiving module structural representation.
Fig. 6 is the final terminal structural representation.
Fig. 7 is a vehicle-mounted digital information handling system structural representation.
Fig. 8 realizes train positioning and real time tracing system structural representation for utilizing leakage coaxial cable.
Fig. 9 is the typical coupling loss curve of the leaky coaxial cable of use in the experiment at 810MHz frequency place.
Coupling loss (50%): 54dB@810MHz.
(100％)：60dB@810MHz。
Transmission loss: 26.7dB/km@810MHz, standing-wave ratio is less than 1.2.
Figure 10 is the typical coupling loss curve of the leaky coaxial cable of use in the experiment at 855MHz frequency place.
Coupling loss (50%): 52dB@855MHz.
(100％)： 58dB@855MHz。
Transmission loss: 27.1dB/km@855MHz.Standing-wave ratio is less than 1.2.
Figure 11 leakage coaxial cable is used for the magnetic-levitation train car-earth communication system structural representation of speed per hour up to 430 kilometers.
Below in conjunction with drawings and Examples invention is further specified.
The specific embodiment
Embodiment 1:
1. invented double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, shown in accompanying drawing 1,2,3.Be extruded into by polyethylene or other plastics and mould the material blank pipe, the both sides of plastics blank pipe are contained two and are strengthened steel wires (201).Strengthen steel wire and plastics air traffic control centre at grade for two, this plastics blank pipes that contain two reinforcement steel wires are mechanical strength supporters (202) of inner wire.In extrusion process, in the plastics blank pipe (202) that contains two reinforcement steel wires, vertically place and have oil-filled optical fiber bundle tubes (203) (fiber count in the oil-filled beam tube is determined by system requirements), this oil-filled optical fiber bundle tubes (203) is the light-transmitting medium of car-ground communication, can constitute opto-electronic conversion special quality car-earth communication system.The preparation width is greater than containing two compound copper-plastics bands (204 (103)) of strengthening plastics blank pipe (202) section girth 3～5mm of steel wire, this compound copper-plastics band (204 (103)) is that copper strips (101) two sides about 0.05mm scribbles the plastic sheeting (102) of acrylic compounds and forms, the plastic sheeting of this acrylic compounds can with the Copper Foil close adhesion, again can be bonding with the polyethylene precision.Vertical the wrapping in of above-mentioned compound copper-plastics band (204 (103)) contained on two plastics blank pipes (202) of strengthening steel wires, and heating makes vertical overseam crack bonding in vertical packet shaping process, form inner wire (205), because the compound copper-plastics band of inner wire about by 0.05mm formed, so can save a large amount of copper, making Lou, the price of cable descends.This novel inner wire size dimension is determined that by the leakage coaxial scantling of structure physically foamed pe insulation layer (206) of respective thickness is arranged in the conductor.On the copper strips (207) of width greater than the thick 0.1mm of above-mentioned physically foamed pe insulation layer section girth 5～7mm, periodicity rolling positive and negative " E " font radius (208).Above-mentioned rolling there be periodically vertical the wrapping on the physically foamed pe insulation layer (206) of copper strips (207) of positive and negative " E " font radius, form leakage coaxial outer conductor (209).This has just made double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable to go up the thick polyethylene sheath (301) of extrusion molding 2.5mm at leakage coaxial outer conductor (209).
2. invented the Car antnna that leaky coaxial cable is made, as shown in Figure 4.The short-circuit line of n λ/4 that utilizes the vertical elongated slot leakage coaxial of outer conductor is as the antenna that transmits and receives of onboard system.Wherein n be 1,3,5,7,9,11,13, the odd number of 15......, λ is respectively the electromagnetic wavelength of vehicle-mounted transmitting antenna or receiving wire.This leakage coaxial is made up of inner wire (401), dielectric (402), outer conductor (403) and sheath (404).The leakage coaxial of intercepting n λ/4 length, and with its terminal inner wire (401) and outer conductor (403) diameter and vertically consistent copper sheet (405) the sealing short circuit of elongated slot leakage coaxial outer conductor diameter, the top internal and external conductor connects the internal and external conductor of feeder line respectively, promptly makes vertical elongated slot leakage coaxial Car antnna (406).Coupling performance between this antenna and leakage coaxial is reliable and stable.Make the Car antnna receiving system externally come electromagnetic interference to have very high defend degree, vehicle-mounted system of transmit antennas field intensity increases and decay rapidly with distance, has very big social benefit and economic benefit.
3. invented the light-to-current inversion sending/receiving module, it comprises two parts.The optical signal that transmits from the terminal of train positioning and command echelon recovers the electric signal that terminal mails to train again through isolating the optical signal that is carried on this node wave length behind the channel-splitting filter behind the filter of optical filter, O/E changer, preposition amplification and power amplifier and electricity.The internal and external conductor of this signal two-way feed-in leakage coaxial cable behind diplexer and power divider.The electric signal that transmits from train is coupled into the internal and external conductor of leakage coaxial cable, takes out the electric signal that is mail to train positioning and command echelon terminal by train behind power divider, diplexer.This electric signal is transformed into the optical signal that is carried on this node wave length behind electrical filter, preamplifier, E/O changer and optical filter, be sent to train positioning and command echelon terminal behind multiplexer.As shown in Figure 5.
4. invented the structure of train positioning and command echelon terminal.The electronic three-dimensional map that this terminal has photoelectric conversion device, formulates according to track curvature radius and roadbed situation.This electronic chart subscript is marked with that each section along the line allows road speed and from accurate location position point, high speed data disposal system and the large screen display system of λ 1～λ n.The optical signal that train mails to this terminal recovers electric signal behind the filter of Wave decomposing multiplexer, high-speed optical switch, O/E changer, preamplifier and electricity, take out data-signal behind modem.Main frame is gathered this signal, and carries out comprehensive analyses in conjunction with electronic three-dimensional map information, and train information is presented on the large screen display in real time.The signal that this terminal mails to train is transformed into the optical signal that is carried on the specific wavelength behind the filter of modem, electricity, preamplifier, E/O changer.Behind high-speed optical switch and wavelength division multiplexer, be transferred to specified node.As shown in Figure 6.
5. invented vehicle-mounted digital information handling system structure.Vehicle-mounted receiving wire receives the electric signal that train positioning and command echelon terminal are sent, and recovers data-signal behind the filter of the filter of electricity, preamplifier, electricity, modem.Main frame is gathered this signal, and carry out comprehensive analyses in conjunction with electronic three-dimensional map information, the information that train positioning and command echelon terminal are sent is presented on the computer display in real time, and carries out train positioning and command echelon terminal and assign driving instruction to this train.The signal that train mails to train positioning and command echelon terminal enters vehicle-mounted emitting antenna and radiate behind the filter of the filter of modem, electricity, preamplifier, power amplifier, electricity.As shown in Figure 7.
6. later-model train accurately location and real time tracing system have been formed by above-mentioned five invention structures.The light-to-current inversion sending/receiving module is as the fiber optic multiplexer/demultiplexer of intermediate node one edge joint, the leakage coaxial cable internal and external conductor that it is 500～1000m that the power divider of another side is connected on two length respectively.Leakage coaxial cable internal and external conductor terminal connects characteristic impedance, length viewing system condition of service and deciding.The radius of vehicle-mounted transmission and receiving wire and the radius of leakage coaxial cable over against, about midfeather 1m.As shown in Figure 8.
7. in this accurate location and real time tracing system, two optical fiber in the leakage coaxial cable are communicated with on whole line, channel-splitting filter that light is arranged in light-to-current inversion send to receive structure wherein, (wherein λ i can be λ 1 to λ i under dividing, λ 2, λ 3...... λ n) wavelength, divide the optical signal of following λ i through the electric signal of light-to-current inversion for sending, be amplified into power divider, about being connected on two leakage coaxial cables, the driving instruction of sending of train positioning and command echelon terminal just is radiated Car antnna by leakage coaxial like this, and locomotive does not receive the driving that command centre sends with just can having error code and instructs.Second optical fiber sends in light-to-current inversion and receives the multiplexer that λ i is arranged in the structure, from the cab signal of leakage coaxial through the reception of Wavelength Assignment device, become optical signal through light-to-current inversion, reach train positioning and command echelon terminal through multiplexer again, train positioning and command echelon terminal just can receive the information that whole all locomotives of Train Dispatching section send like this.
In light-to-current inversion sending/receiving block structure through power divider with about two leakage coaxial cables link to each other, the about 0.2m in the interval of two leakage coaxial cables, also be 0.2m in space, two coaxial nature impedance junctions simultaneously, what Car antnna was received through 0.2m the time is " location position signal ".This " location position signal " is exactly accurately to locate rate-aided signal.Train is accurately located and real time tracing system is the modulation of adopting QPSK, transfer rate is up to 4Mbps, mode of its transmission information is to send one group of train information every 20ms, and every group of information repeats to send out ten times, so " location position signal " can not influence the correctness of train information transmission.The bit error ratio of this car-ground information communication far away＜10
-6The requirement of the bit error ratio of the magnetic suspension train car-ground information communication of Germany is＜10
-6
Embodiment 2:
A kind of employing leakage coaxial cable is realized train positioning and real time tracing system, the electronic three-dimensional map that comprises terminal structure, vehicle-mounted digital information handling system structure and Wideband RF Amplifier, filter, the high speed data processing terminal of Car antnna, light-to-current inversion sending/receiving block structure, train positioning and command echelon that double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, leaky coaxial cable are made, formulates according to track curvature radius and roadbed situation.
Double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, structure is for adopting double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, be extruded into by polyethylene or other plastics and moulded the material blank pipe, two reinforcement steel wires are contained in the both sides of plastics blank pipe, vertically place to have oil-filled optical fiber bundle tubes.Adopt width greater than containing two compound copper-plastics bands of strengthening the plastics blank pipe section girth 3～5mm of steel wire, this compound copper-plastics band is the plastic sheeting that the copper strips two sides about 0.05mm scribbles acrylic compounds, vertical the wrapping in of above-mentioned compound copper-plastics band contained on two plastics blank pipes of strengthening steel wires, and heating makes vertical overseam crack bonding in vertical packet shaping process, form inner wire, the physically foamed pe insulation layer of respective thickness is arranged in the conductor.On the copper strips of width greater than the thick 0.1mm of above-mentioned physic foaming insulation layer section girth 5～7mm, periodicity rolling positive and negative " E " font radius.Above-mentioned rolling there be periodically vertical the wrapping on the physically foamed pe insulation layer of copper strips of positive and negative " E " font radius, form the leakage coaxial outer conductor.The polyethylene sheath that extrusion molding 2.5mm is thick on the leakage coaxial outer conductor has constituted double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable.
The Car antnna that leaky coaxial cable is made, structure are to utilize the short-circuit line of n λ/4 of the vertical elongated slot leakage coaxial of outer conductor as the antenna that transmits and receives of onboard system.Wherein n be 1,3,5,7,9,11,13, the odd number of 15......, λ is respectively the electromagnetic wavelength of vehicle-mounted transmitting antenna or receiving wire, this leakage coaxial is made up of inner wire, dielectric, outer conductor and sheath.The leakage coaxial of intercepting n λ/4 length, and with its terminal inner wire and the outer conductor diameter copper sheet sealing short circuit identical with vertical elongated slot leakage coaxial outer conductor diameter, the top internal and external conductor connects the internal and external conductor of feeder line respectively, promptly makes vertical elongated slot leakage coaxial Car antnna.
The termination that it is the leakage coaxial cable of 500 (or 1000m) that power divider in the light-to-current inversion sending/receiving module is connected on two length respectively, the other end of these two leakage coaxial cables is connected to the characteristic impedance of this leakage coaxial cable, two optical fiber in the leakage coaxial cable are communicated with on whole line, channel-splitting filter that light is arranged in light-to-current inversion send to receive structure wherein, (wherein λ i can be λ 1 to λ i under dividing, λ 2, λ 3...... λ n) wavelength, divide the optical signal of following λ i through the electric signal of light-to-current inversion for sending, be amplified into power divider, the internal and external conductor of two leakage coaxial cables about being connected to.
The light-to-current inversion sending/receiving module has utilized the fibre bundle in the leakage coaxial cable to constitute light-to-current inversion and has sent the reception structure.The filter and the power divider that contain fiber optic modulator of closing ripple and channel-splitting filter, light and detector, high-power high-frequency amplifier, electricity in the structure.Adopt frequency to be about the interior frequency of 800～900MHz scope, also can adopt 400～450MHz.
In the light-to-current inversion sending/receiving module power divider with about the point of connection, the point of connection of two leakage coaxial cable termination property impedance of two leakage coaxial cables be exactly accurate location position point.
The electronic three-dimensional map that the vehicle-mounted digital information handling system contains the amplifier, high speed data processing terminal of modulating system, the high-frequency wideband electricity of filter, the QPSK electricity of electricity, formulate according to track curvature radius and roadbed situation, vehicle-mountedly transmit and receive antenna, carry out the execution architecture of the driving instruction that train positioning and command echelon terminal assign.
The terminal of train positioning and command echelon contains the amplifier, high speed data processing terminal of modulating system that optical fiber transmits and receives filter, the QPSK electricity of module, electricity, high-frequency wideband electricity, the electronic chart of formulating according to track curvature radius and roadbed situation, the decision structure and the driving instruction of optimization driving running chart send system.
Driving that the terminal of train positioning and command echelon is sent instruction is radiated Car antnna by leakage coaxial, and train does not receive the driving that the terminal of train positioning and command echelon sends with can having error code and instructs.Second optical fiber sends in light-to-current inversion and receives the multiplexer that λ i is arranged in the structure, from the cab signal of leakage coaxial through the reception of Wavelength Assignment device, become optical signal through light-to-current inversion, reach the terminal of train positioning and command echelon again through multiplexer, the terminal of train positioning and command echelon just can receive the information that whole all locomotives of Train Dispatching section send like this.
In light-to-current inversion sending/receiving block structure through power divider with about two leakage coaxial cables link to each other, the about 0.2m in the interval of two leakage coaxial cables, also be 0.2m in space, two coaxial nature impedance junctions simultaneously, what Car antnna was received through 0.2m the time is " location position signal ".This " location position signal " is exactly accurately to locate rate-aided signal.Train is accurately located and real time tracing system is the modulation of adopting QPSK, transfer rate is up to 4Mbps, mode of its transmission information is to send one group of train information every 20ms, and every group of information repeats to send out ten times, so " location position signal " can not influence the correctness of train information transmission.The bit error ratio of this car-ground information communication far away＜10
-6The requirement of the bit error ratio of the magnetic suspension train car-ground information communication of Germany is＜10
-6
The receiving system of Car antnna is at λ
iThe position on received " location position signal ", at this moment on the locomotive on the electronic chart of computing machine,, also can accurately calculate locomotive real-world operation speed and acceleration/accel with clearly marking the accurate position at locomotive place.The terminal of train positioning and command echelon receives the real time information that every train sends like this, just can be at the accurate calibration position, running velocity and the acceleration/accel that demonstrate every time train place in whole scheduling interval on the electronic three-dimensional map in real time.Computing machine is according to the information of this electronic chart stored data and each train of receiving in real time, calculate best train diagram rapidly, and send corresponding driving instruction to each time train, and after train receives the driving instruction, handle train by instruction and quicken, slow down even brake.
Claims (8)
1 adopts leakage coaxial cable to realize the system of train positioning and real-time tracing, it is characterized in that: comprise following structure:
(1) double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable;
(2) Car antnna made of leaky coaxial cable;
(3) light-to-current inversion sending/receiving module;
(4) terminal of train positioning and command echelon;
(5) vehicle-mounted digital information handling system.
2 employing leakage coaxial cables according to claim 1 are realized the system of train positioning and real-time tracing, it is characterized in that: adopt double-steel-wire reinforced inner conductor " E " shape fluting outer conductor leakage coaxial cable, comprised later-model leakage coaxial inner wire, this inner wire by both sides contain strengthen steel wire the plastics blank pipe as the mechanical strength supporter, in this blank pipe, has the optical fiber bundle tubes that constitutes by multifiber, extrusion molding has physic foaming insulation layer in the conductor, vertical bag rolls on insulating barrier the periodically copper strips of the thick 0.1mm of positive and negative " E " shape radius, form the outer conductor of leakage coaxial, the thick sheath of extrusion molding 2.5mm on the outer conductor.
3 employing leakage coaxial cables according to claim 1 are realized the system of train positioning and real-time tracing, it is characterized in that: the short-circuit line of n λ/4 of the vertical elongated slot leakage coaxial of Car antnna utilization that leaky coaxial cable is made, the antenna that transmits and receives as onboard system, wherein n is 1,3,5,7,9,11,13,15 ... odd number, λ is respectively the electromagnetic wavelength of vehicle-mounted transmitting antenna or receiving wire.The internal and external conductor of antenna terminal seals short circuit with diameter with the copper sheet that vertically elongated slot leakage coaxial outer conductor diameter is identical.
4 employing leakage coaxial cables according to claim 1 are realized the system of train positioning and real-time tracing, it is characterized in that: the light-to-current inversion sending/receiving module has utilized the fibre bundle in the leakage coaxial cable, constitute light-to-current inversion and sent the reception structure, the filter and the power divider that contain fiber optic modulator of closing ripple and channel-splitting filter, light and detector, high-power high-frequency amplifier, electricity in the structure, adopt frequency to be about the interior frequency of 800～900MHz scope, or adopt 400～450MHz.
5 employing leakage coaxial cables according to claim 1 are realized the system of train positioning and real-time tracing, it is characterized in that: the terminal structure of train positioning and command echelon contains the amplifier, high speed data processing terminal of modulating system, the high-frequency wideband electricity of filter that optical fiber transmits and receives module, electricity, QPSK electricity, the electronic three-dimensional map of formulating according to track curvature radius and roadbed situation, the decision structure and the driving instruction of optimization driving running chart send system.
6 employing leakage coaxial cables according to claim 1 are realized the system of train positioning and real-time tracing, it is characterized in that: vehicle-mounted digital information handling system structure contains electronic three-dimensional map that the transmission is made up of leakage coaxial and receiving wire, wideband high-frequency put people's device, filter, high speed data processing terminal, formulate according to track curvature radius and roadbed situation, carry out the execution architecture that driving that train positioning and command echelon terminal assign is instructed.
7 employing leakage coaxial cables according to claim 1 are realized the system of train positioning and real-time tracing, it is characterized in that: in the light-to-current inversion sending/receiving module power divider with about the point of connection, the point of connection of two leakage coaxial cable termination property impedance of two leakage coaxial cables be exactly accurate location position point.
8 adopt leakage coaxial cable to realize the method for train positioning and real-time tracing, it is characterized in that: when Car antnna receives corresponding accurately location position signal, on electronic chart, will clearly mark the accurate position at locomotive place, accurately calculate locomotive real-world operation speed and acceleration/accel, command centre receives the real time information that every train sends like this, just can be in the accurate calibration position that demonstrates every time train place in whole scheduling interval on the electronic chart in real time, running velocity and acceleration/accel, computing machine is according to the information of this electronic chart stored data and each train of receiving in real time, calculate best train diagram rapidly, and send corresponding driving to each time train and instruct, and after train receives driving instruction, handle train by instruction to quicken, slow down even brake.
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| CN102806932A (en) * | 2012-08-28 | 2012-12-05 | 简水生 | Safe running method and system based on intelligent optical fiber sensing technology and E-shaped and reverse E-shaped leaky coaxial cables |
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| CN107195373A (en) * | 2017-03-29 | 2017-09-22 | 江苏亨鑫科技有限公司 | Photoelectricity is combined leakage coaxial cable and leakage cable monitoring system and detection method |
| CN108146467A (en) * | 2017-12-21 | 2018-06-12 | 中国铁道科学研究院通信信号研究所 | A kind of magnetic-levitation train is accurately positioned auxiliary device and method |
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| CN108146467A (en) * | 2017-12-21 | 2018-06-12 | 中国铁道科学研究院通信信号研究所 | A kind of magnetic-levitation train is accurately positioned auxiliary device and method |
| CN108146467B (en) * | 2017-12-21 | 2020-06-05 | 中国铁道科学研究院通信信号研究所 | Precise positioning auxiliary device and method for magnetic-levitation train |
| CN110553154A (en) * | 2018-05-31 | 2019-12-10 | 中国科学院声学研究所 | urban underground pipe network leakage monitoring method and system |
| CN110281984A (en) * | 2019-02-03 | 2019-09-27 | 中铁二院工程集团有限责任公司 | High-speed maglev train positioning system and localization method based on optical frequency domain reflection technology |
| CN111856396A (en) * | 2020-07-10 | 2020-10-30 | 交控科技股份有限公司 | Positioning processing method and device and readable storage medium |
| CN111856396B (en) * | 2020-07-10 | 2023-08-11 | 交控科技股份有限公司 | Positioning processing method, positioning processing device and readable storage medium |
| CN114696105A (en) * | 2020-12-31 | 2022-07-01 | 江苏俊知技术有限公司 | Leaky circular waveguide transmission line with novel structure and manufacturing method thereof |
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