CN104960551A - Unattended system for sensing railway field operation and protection based on photonic crystal fiber - Google Patents
Unattended system for sensing railway field operation and protection based on photonic crystal fiber Download PDFInfo
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- CN104960551A CN104960551A CN201510357531.0A CN201510357531A CN104960551A CN 104960551 A CN104960551 A CN 104960551A CN 201510357531 A CN201510357531 A CN 201510357531A CN 104960551 A CN104960551 A CN 104960551A
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Abstract
An unattended system for sensing railway field operation and protection based on a photonic crystal fiber is suitable for the fields of railway construction, optical fiber sensing and the like. The system is composed of a measurement module and a receiving module. The output end of a laser source (1) of the measurement module is connected with the input end of a phase modulator (2), the output end of the phase modulator (2) is connected with the input end of the photonic crystal fiber (3), a vibration signal is exerted on the photonic crystal fiber, the output end of the photonic crystal fiber (3) is connected with the input end of a photoelectric detector (4), the output end of the photoelectric detector (4) is connected with the input end of a signal processing module (5), the output end of the signal processing module (5) is connected with the input end of a wireless transmitting module (6), the output end of a wireless receiving module (7) of the receiving module is connected with the input end of a signal processing module (8), and the output end of the signal processing module (8) is connected with a display module (9) and a loudspeaker (10). According to the invention, the location of a coming vehicle can be accurately located by adopting the photonic crystal fiber sensing technology. The system has the advantages of low energy dependence, electromagnetic interference resistance, corrosion resistance and the like. Accidents caused by a fact that protection personnel cannot timely inform constructors of avoiding at mountain lines and curve districts with poor lookout conditions are avoided.
Description
Technical field
The present invention relates to photonic crystal fiber perception Railway Site operation protection unattended system, be applicable to the field such as construction of railways, Fibre Optical Sensor.
Background technology
Construction of railways is the essential condition ensureing that railway normally runs, and work progress normally carries out with railway transportation simultaneously, therefore ensures that construction of railways has important practical significance safely.
At present, Railway Site operation protection forewarn system mainly contains following method: job scheduling, Ren Gong lookout and satellite positioning tech.Railway transportation can be divided into transport current phase and job execution phase from the time.For construction that is simple, that concentrate, can be arranged in skylight and carry out; For loaded down with trivial details maintenance activity, the skylight point time is difficult to meet the demands, and train interval will be utilized to carry out operation, and the security requirement of at this moment constructing is higher, usually adopts the mode of Ren Gong lookout to solve.But along with the development of high speed railway, train running speed improves constantly, this means that the pre-warning time of train shortens greatly, construction early warning difficulty improves greatly, very easily causes the generation of on-the-spot unexpected dangerous situation.Satellite positioning tech realizes the real-time monitoring to overall All Jobs point, effectively supervises, guarantee job safety to site safety handling situations.Set up mutual monitoring mechanism between operation safe monitoring main frame and protection extension set at the scene simultaneously, break down in system any point, all forbid upper track construction operation, and will protect and handling situations in real time, comprise operating location, workmen's situation, road state and protection situation etc. are uploaded to monitoring and control centre up and down.But the on-the-spot protective device of employing satellite technology there is volume and quality is large, is not easy to carry, poor availability, cannot realizes the shortcomings such as commercialization.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of photonic crystal fiber perception Railway Site operation protection unattended system.
Technical scheme of the present invention:
A kind of photonic crystal fiber perception Railway Site operation protection unattended system, this system is made up of measurement module and receiver module two parts.Measurement module is divided into up survey module and down-run survey module, and up survey module is identical with the structure of down-run survey module.The lasing light emitter of measurement module exports the input end of termination phase modulator, the input end of the output termination photonic crystal fiber of phase modulator, vibration signal is applied on photonic crystal fiber, photonic crystal fiber exports termination photodetector input end, the input end of the output termination signal processing module of photodetector, the input end of the output termination wireless transmitter module of signal processing module.The wireless receiving module of receiver module exports the input end of termination signal processing module, the output termination display module of signal processing module and loud speaker.
First up survey module and down-run survey module are arranged in up direction and the down direction 5-6 km of railway track, detect the vibration of Steel rail vehicle in real time.The light that light source sends incides on photonic crystal fiber after phase modulator modulation, and when not having train through out-of-date, the wavelength of multiple-mode interfence can not change.When track having train through out-of-date, photodetector will detect that the wavelength of multiple-mode interfence changes.Optical signal becomes electric signal after photodetector, and electric signal sends into wireless transmitter module through signal processing module process, and wireless transmitter module launches alerting signal.Wireless receiving module receives the alerting signal of being come by transmission of wireless signals, output to signal processing module, the signal that signal processing module exports is shown by display module, and by sound signal by loud speaker transmission, thus the information that notice camp site has train to pass through.Receiver module is placed on camp site, is usually carried by workmen.In a set of equipment, multiple receiver module can be configured.
Beneficial effect of the present invention: what the present invention proposed can locate the position of sending a car based on photonic crystal fiber perception Railway Site operation protection unattended system, based on photonic crystal fiber cognition technology, there is long distance detection, low energy dependence, high environmental resistance, electromagnetism interference, the advantage such as anticorrosive, adopt the mode of high-frequency wireless signals transmission data to realize the early warning arrived to field operation personnel train, whole prealarming process only needs 0.3 second simultaneously.Bi Mian looks at mountain route, the 3 in Curve Segment of condition difference, occurs protection personnel notice site operation personnel generation of dodging accident not prompt enough.
Accompanying drawing explanation
Fig. 1 is based on photonic crystal fiber perception Railway Site operation protection unattended system structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment one, see Fig. 1, a kind of photonic crystal fiber perception Railway Site operation protection unattended system, this system is made up of measurement module and receiver module two parts, the input end of the output termination phase modulator 2 of the lasing light emitter 1 of measurement module, the input end of the output termination photonic crystal fiber 3 of phase modulator 2, vibration signal is applied to photonic crystal fiber, photonic crystal fiber 3 exports termination photodetector 4 input end, the input end of the output termination signal processing module 5 of photodetector 4, the input end of the output termination wireless transmitter module 6 of signal processing module 5.The input end of the output termination signal processing module 8 of the wireless receiving module 7 of receiver module, the output termination display module 9 of signal processing module 8 and loud speaker 10.
First up survey module and down-run survey module are arranged in up direction and the down direction 5-6 km of railway track, detect the vibration of Steel rail vehicle in real time.The light that light source sends incides on photonic crystal fiber after phase modulator modulation, and when not having train through out-of-date, the wavelength of multiple-mode interfence can not change.When track having train through out-of-date, photodetector will detect that the wavelength of multiple-mode interfence changes.The wavelength that photodetector detects changes, and optical signal becomes electric signal after photodetector, then sends into wireless transmitter module after signal processing module process, and wireless transmitter module launches alerting signal.Wireless receiving module receives the alerting signal of being come by transmission of wireless signals, output to signal processing module, the signal that signal processing module exports is shown by display module, and by sound signal by loud speaker transmission, thus the information that notice camp site has train to pass through.
Light source described in the present embodiment is LED light source, and photonic crystal fiber length is 1cm, and photonic crystal fiber cladding diameter is 268 μm, and core diameter is 25.2 μm, and the modulating frequency of phase modulator is 100Hz.Transmission over radio adopts Wifi network.
Embodiment two, see Fig. 1, a kind of photonic crystal fiber perception Railway Site operation protection unattended system, this system is made up of measurement module and receiver module two parts, the input end of the output termination phase modulator 2 of the lasing light emitter 1 of measurement module, the input end of the output termination photonic crystal fiber 3 of phase modulator 2, vibration signal is applied to photonic crystal fiber, photonic crystal fiber 3 exports termination photodetector 4 input end, the input end of the output termination signal processing module 5 of photodetector 4, the input end of the output termination wireless transmitter module 6 of signal processing module 5.The input end of the output termination signal processing module 8 of the wireless receiving module 7 of receiver module, the output termination display module 9 of signal processing module 8 and loud speaker 10.
First up survey module and down-run survey module are arranged in up direction and the down direction 5-6 km of railway track, detect the vibration of Steel rail vehicle in real time.The light that light source sends incides on photonic crystal fiber after phase modulator modulation, and when not having train through out-of-date, the wavelength of multiple-mode interfence can not change.When track having train through out-of-date, photodetector will detect that the wavelength of multiple-mode interfence changes.The wavelength that photodetector detects changes, and optical signal becomes electric signal after photodetector, then sends into wireless transmitter module after signal processing module process, and wireless transmitter module launches alerting signal.Wireless receiving module receives the alerting signal of being come by transmission of wireless signals, output to signal processing module, the signal that signal processing module exports is shown by display module, and by sound signal by loud speaker transmission, thus the information that notice camp site has train to pass through.
Light source described in the present embodiment is ASE wideband light source, and photonic crystal fiber length is 3cm, and photon crystal cladding diameter is 268 μm, and core diameter is 25.2 μm, and the modulating frequency of phase modulator is 2000Hz.Transmission over radio adopts Zigbee network.
Embodiment three, see Fig. 1, a kind of photonic crystal fiber perception Railway Site operation protection unattended system, this system is made up of measurement module and receiver module two parts, the input end of the output termination phase modulator 2 of the lasing light emitter 1 of measurement module, the input end of the output termination photonic crystal fiber 3 of phase modulator 2, vibration signal is applied to photonic crystal fiber, photonic crystal fiber 3 exports termination photodetector 4 input end, the input end of the output termination signal processing module 5 of photodetector 4, the input end of the output termination wireless transmitter module 6 of signal processing module 5.The input end of the output termination signal processing module 8 of the wireless receiving module 7 of receiver module, the output termination display module 9 of signal processing module 8 and loud speaker 10.
First up survey module and down-run survey module are arranged in up direction and the down direction 5-6 km of railway track, detect the vibration of Steel rail vehicle in real time.The light that light source sends incides on photonic crystal fiber after phase modulator modulation, and when not having train through out-of-date, the wavelength of multiple-mode interfence can not change.When track having train through out-of-date, photodetector will detect that the wavelength of multiple-mode interfence changes.The wavelength that photodetector detects changes, and optical signal becomes electric signal after photodetector, then sends into wireless transmitter module after signal processing module process, and wireless transmitter module launches alerting signal.Wireless receiving module receives the alerting signal of being come by transmission of wireless signals, output to signal processing module, the signal that signal processing module exports is shown by display module, and by sound signal by loud speaker transmission, thus the information that notice camp site has train to pass through.
Light source described in the present embodiment is LD light source, and photonic crystal fiber length is 5cm, and photonic crystal fiber cladding diameter is 268 μm, and core diameter is 25.2 μm, and the modulating frequency of phase modulator is 1000Hz.Transmission over radio adopts 433Mhz network
Light source of the present invention can use the multi wave length illuminating source of C, L, O, E wave band, and photonic crystal fiber length can be suitable for situation according to reality and choose, and the device used is commercial devices.Foregoing is only the detailed description to present pre-ferred embodiments; and protection scope of the present invention is not limited to foregoing; those skilled in the art can according to the bright thought of we, and carry out various distortion and modification to the present invention, these should belong to protection scope of the present invention.
Claims (1)
1. one kind is protected unattended system based on the operation of photonic crystal fiber perception Railway Site, it is characterized in that: this system is made up of measurement module and receiver module two parts, the input end of the output termination phase modulator (2) of the lasing light emitter (1) of measurement module, the input end of the output termination photonic crystal fiber (3) of phase modulator (2), vibration signal is applied on photonic crystal fiber, photonic crystal fiber (3) exports termination photodetector (4) input end, the input end of the output termination signal processing module (5) of photodetector (4), the input end of the output termination wireless transmitter module (6) of signal processing module (5), the input end of the output termination signal processing module (8) of the wireless receiving module (7) of receiver module, the output termination display module (9) of signal processing module (8) and loud speaker (10).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114162177A (en) * | 2022-01-04 | 2022-03-11 | 安徽徽一通讯科技有限公司 | Early warning bracelet is used in operation protection between railway section |
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Application publication date: 20151007 |