CN102358335A - M-Z (Mach-Zehnder) interferometer based real-time positioning system for rapid train - Google Patents
M-Z (Mach-Zehnder) interferometer based real-time positioning system for rapid train Download PDFInfo
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- CN102358335A CN102358335A CN2011102678186A CN201110267818A CN102358335A CN 102358335 A CN102358335 A CN 102358335A CN 2011102678186 A CN2011102678186 A CN 2011102678186A CN 201110267818 A CN201110267818 A CN 201110267818A CN 102358335 A CN102358335 A CN 102358335A
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Abstract
The invention relates to an M-Z (Mach-Zehnder) interferometer based real-time positioning system for a rapid train. The real-time positioning system is suitable for the fields, such as fiber sensing, rail transit and the like, and is used for solving the problem of specifically positioning a train. The real-time positioning system is characterized in that the output of a broadband light source (1) is connected with a first port (211) of a first three-port coupler; a second port (212) of the first three-port coupler is connected with one end of a signal arm fiber (31); a third port (213) of the first three-port coupler is connected with one end of a reference arm fiber (32); the other end of the signal arm fiber (31) is connected with a first port (221) of a second three-port coupler; the other end of the reference arm fiber (32) is connected with a second port (222) of the second three-port coupler; a third port (223) of the second three-port coupler is connected with an input end of a photoelectric detector (4); an output end of the photoelectric detector is connected with a data acquiring card (5); the data acquiring card is connected with a computer (6); the signal arm fiber (31) encircles a columnar piezoelectric ceramic (7); a sensing fiber (33) is parallel to an optical axis; and a light time domain reflecting meter (8) is connected with one end of the sensing fiber.
Description
Technical field
The present invention relates to a kind of high speed train real-time positioning system, be applicable to fields such as optical fiber sensing technology, civil engineering, track traffic based on the M-Z interferometer.
Background technology
Optical fiber sensing technology is one of emerging technology of late 1970s.Compare with traditional sensors, optical fiber transducer has following characteristics: bandwidth, do not receive electromagnetic interference, highly sensitive, volume is little, damage threshold is high, needn't contact with testee, electronic machine and sensor can be far away at interval and can form advantage such as sensing network.
At present optical fiber transducer can be divided into two types: one type is to utilize some sensitivity characteristic of optical fiber itself or scales that function is processed to be the functional form sensor; Another kind of is the light transmission type sensor, and optical fiber only plays the transmission light wave, also must install other end insties additional in fiber end face or centre and just constitute sensor.The light that the requirement of light transmission type sensor can be transmitted is The more the better, so it mainly constitutes with multimode optical fibers; And the functional form sensor need lean on the measurand modulation or change fiber optic transport property, so generally how to constitute with single mode optical fibre.
Optical fiber transducer is applied to the train real-time positioning, generally all adopts fibre optic interferometer to belong to the function sensor type.Fibre optic interferometer is based on the fiber optic sensor system that interference of light technology is used to detect; It is one of important optical device in ferry optics comunication, the technical field of optical fiber sensing; Its survey precision is higher than the survey precision of ordinary optic fibre sensor; It not only has traditional interferometer function, and can gaging pressure, stress (strain), magnetic field, ratio of refraction, microseismic activity, micrometric displacement or the like, purposes is very extensive.
What fibre optic interferometer was exported is the phase information of laser, and photodetector can only detect the light intensity signal, must take optical phase signal is converted to the method for corresponding light intensity signal for this reason.Traditional optical fiber mach Zehnder interferometer is one of method of light phase demodulation; It is a kind of double-arm interference structure; Obtain in time the measured information with spatial variations through detected result of interference, realize detection pipeline, train, tunnel, fence, railway etc.But adopt traditional optical fiber mach Zehnder interferometer can only orient the approximate location of train driving, and can not orient its particular location, influence the practice of position fixing system, also reduced work efficiency.
Summary of the invention
Technical matters to be solved by this invention provide a kind of can be to the high speed train real-time positioning system based on the M-Z interferometer of the concrete location of train.
Technical scheme of the present invention:
A kind of high speed train real-time positioning system based on the M-Z interferometer; This system comprises that the output of wideband light source connects first port of the one or three port coupler; Second port of the one or three port coupler connects the fiber optic end of signal arm, and the 3rd port of the one or three port coupler connects an end of reference arm optical fiber, first port of fiber optic another termination the two or three port coupler of signal arm; Second port of another termination the two or three port coupler of reference arm optical fiber; The 3rd port of the two or three port coupler connects the input end of photodetector, the output termination data collecting card of photodetector, data acquisition clamping computing machine; The signal arm fiber optic loop is on the column piezoceramic.
The optical axis of sensor fibre and wideband light source laterally arranges, and optical time domain reflectometer connects an end of sensor fibre.
Beneficial effect of the present invention:
A kind of high speed train real-time positioning system that the present invention proposes based on the M-Z interferometer, simple in structure, be easy to realize; The particular location of train driving can be accurately oriented in the parallel laying with optical axis of sensor fibre; System is transformed a little, can constitute the distributed systems structure, can further increase actual monitoring distance and monitoring range, improve systemic price ratio effectively.
Description of drawings
Fig. 1 is based on the high speed train real-time positioning system scheme drawing of M-Z interferometer.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
A kind of high speed train real-time positioning system based on the M-Z interferometer is seen Fig. 1.
This system comprises that the output of wideband light source 1 connects first port 211 of the one or three port coupler; Second port 212 of the one or three port coupler connects an end of signal arm optical fiber 31; The 3rd port 213 of the one or three port coupler connects an end of reference arm optical fiber 32; First port 221 of another termination the two or three port coupler of signal arm optical fiber 31, the 3rd port 223 of second port 222, the, two or three port coupler of another termination the two or three port coupler of reference arm optical fiber 32 connects the input end of photodetector 4; The output termination data collecting card 5 of photodetector 4, data collecting card 5 connects computing machine 6; Signal arm optical fiber 31 is looped around on the column piezoceramic 7.
Sensor fibre 33 laterally arranges with the optical axis of wideband light source 1, and optical time domain reflectometer 8 connects an end of sensor fibre 33.
Signal arm optical fiber 31 is looped around on the column piezoceramic 7, is to be used for offsetting the phase fluctuation that produces because of variation of temperature, obtains the quadrature in phase bias condition.
The coherent light that wideband light source 1 sends is divided into the two bundle laser difference entering signal arm optical fiber 31 and reference arm optical fiber 32 that light intensity equates through the one or three port coupler; The flashlight that flashlight that reference arm optical fiber produces and reference arm optical fiber produce converges formation interfere beat frequency signal through the two or three port coupler, and photodetector 4 detects the interfere beat frequency signal that penetrates from the two or three port coupler.The electric signal that photodetector 4 converts to is gathered through data collecting card 5, and on computing machine 6, is shown.
The one or three port coupler, the two or three port coupler, signal arm optical fiber 31 and reference arm optical fiber 32 constitute the M-Z interferometer; Be used for high speed train is carried out sensor monitoring; When high speed train went in orbit, the M-Z interferometer detected the approximate location of train driving.Sensor fibre 33 and the parallel laying of the optical axis of wideband light source 1; When knowing the approximate location of train driving; Adopt the optical fiber of 8 pairs of these positions of optical time domain reflectometer to measure, return next scattered light intensity, accurately orient the particular location of train driving through monitoring.
Photodetector in the present embodiment select for use InGaAsPIN photodiode AP0917TP that Chongqing Hangwei Photoelectric Sci. & Tech. Co., Ltd. produces as light as photo-electric conversion element; It is direct insertion, have high-responsivity, at a high speed, characteristics such as low-dark current, little electric capacity.Data collecting card adopts NI company to produce DAQ product P CI6024E data collecting card, and it is based on 12 low price, the multifunctional data acquisition card of pci bus, and the PCI slot that can directly insert in computer main board uses.
Device used in the present invention is commercially available device.
Claims (1)
1. high speed train real-time positioning system based on the M-Z interferometer; This system comprises that the output of wideband light source (1) connects first port (211) of the one or three port coupler; Second port (212) of the one or three port coupler connects an end of signal arm optical fiber (31); The 3rd port (213) of the one or three port coupler connects an end of reference arm optical fiber (32); First port (221) of another termination the two or three port coupler of signal arm optical fiber (31), second port (222) of another termination the two or three port coupler of reference arm optical fiber (32), the 3rd port (223) of the two or three port coupler connects the input end of photodetector (4); The output termination data collecting card (5) of photodetector (4), data collecting card (5) connects computing machine (6); Signal arm optical fiber (31) is looped around on the column piezoceramic (7);
It is characterized in that:
Sensor fibre (33) laterally arranges with the optical axis of wideband light source (1), and optical time domain reflectometer (8) connects an end of sensor fibre (33).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102678186A CN102358335A (en) | 2011-09-09 | 2011-09-09 | M-Z (Mach-Zehnder) interferometer based real-time positioning system for rapid train |
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| CN2011102678186A CN102358335A (en) | 2011-09-09 | 2011-09-09 | M-Z (Mach-Zehnder) interferometer based real-time positioning system for rapid train |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2560227C1 (en) * | 2014-04-11 | 2015-08-20 | Открытое Акционерное Общество "Российские Железные Дороги" | Train tracking system |
| CN104960550A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on double-core optical fiber interferometer |
| CN104960549A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Protective unattended system capable of sensing railway field operation on the basis of thin-core optical fiber |
| CN104960552A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on coreless optical fiber sensing |
| RU2608783C2 (en) * | 2012-12-06 | 2017-01-24 | Сименс Акциенгезелльшафт | Location of vehicle |
| CN109080666A (en) * | 2018-07-11 | 2018-12-25 | 北京全路通信信号研究设计院集团有限公司 | Train continuous real-time positioning system and method |
| CN109813350A (en) * | 2019-01-14 | 2019-05-28 | 中车青岛四方机车车辆股份有限公司 | A kind of high-speed magnetic floating novel optical fiber positioning system |
| CN113924044A (en) * | 2019-04-18 | 2022-01-11 | 加利福尼亚州立大学董事会 | System and method for continuous non-invasive ultrasound monitoring of blood vessels and central organs |
-
2011
- 2011-09-09 CN CN2011102678186A patent/CN102358335A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2608783C2 (en) * | 2012-12-06 | 2017-01-24 | Сименс Акциенгезелльшафт | Location of vehicle |
| US9566988B2 (en) | 2012-12-06 | 2017-02-14 | Siemens Aktiengesellschaft | Locating of vehicles |
| RU2560227C1 (en) * | 2014-04-11 | 2015-08-20 | Открытое Акционерное Общество "Российские Железные Дороги" | Train tracking system |
| CN104960550A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on double-core optical fiber interferometer |
| CN104960549A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Protective unattended system capable of sensing railway field operation on the basis of thin-core optical fiber |
| CN104960552A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on coreless optical fiber sensing |
| CN109080666A (en) * | 2018-07-11 | 2018-12-25 | 北京全路通信信号研究设计院集团有限公司 | Train continuous real-time positioning system and method |
| CN109813350A (en) * | 2019-01-14 | 2019-05-28 | 中车青岛四方机车车辆股份有限公司 | A kind of high-speed magnetic floating novel optical fiber positioning system |
| CN113924044A (en) * | 2019-04-18 | 2022-01-11 | 加利福尼亚州立大学董事会 | System and method for continuous non-invasive ultrasound monitoring of blood vessels and central organs |
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Application publication date: 20120222 |