CN203572595U - Optical fiber temperature and vibration sensor and comprehensive monitoring device - Google Patents

Optical fiber temperature and vibration sensor and comprehensive monitoring device Download PDF

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Publication number
CN203572595U
CN203572595U CN201320787146.6U CN201320787146U CN203572595U CN 203572595 U CN203572595 U CN 203572595U CN 201320787146 U CN201320787146 U CN 201320787146U CN 203572595 U CN203572595 U CN 203572595U
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dorsad
signal
stokes
receiver module
optical fiber
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CN201320787146.6U
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李德和
王建强
夏俊玲
史振国
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Weihai Beiyang Electric Group Co Ltd
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Weihai Beiyang Electric Group Co Ltd
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Abstract

The utility model relates to the field of optical fiber sensing and safety protection, and particularly to an optical fiber temperature and vibration sensor and a comprehensive monitoring device, wherein the optical fiber temperature and vibration sensor can simultaneously monitor temperature information and vibration information. The optical fiber temperature and vibration sensor is characterized by including a pulse laser, a 2*2 optical coupler, a first sensing optical fiber, a wavelength division multiplexer, a second sensing optical fiber, a backward direction anti-Stokes signal photoelectric reception module, a backward direction Stokes signal photoelectric reception module, a Rayleigh scattering signal photoelectric reception module, a coherent light signal photoelectric reception module and a data acquisition unit, wherein the data acquisition unit is respectively connected with input terminals of the backward direction anti-Stokes signal photoelectric reception module, the backward direction Stokes signal photoelectric reception module, the Rayleigh scattering signal photoelectric reception module and the coherent light signal photoelectric reception module. Compared with the prior art, the optical fiber temperature and vibration sensor is higher in vibration detection sensitivity.

Description

A kind of fiber optic temperature vibration transducer and integrated monitoring apparatus
Technical field
The utility model relates to Fibre Optical Sensor and safety protection field, specifically fiber optic temperature vibration transducer and the integrated monitoring apparatus of a kind of monitor temperature information simultaneously and vibration information.
Background technology
Distributed optical fiber temperature sensor is to utilize optical fiber spontaneous Raman scattering light intensity to be subject to the principle of temperature modulation and optical time domain reflection principle and the distributed optical fiber Raman temperature sensor that forms, has wide application market.Due to its temperature at real-time prediction scene and the trend of variation thereof online, alarm temperature is set scene temperature is changed and monitored, be a kind of line-type heat detector of essential safe type, be successfully applied to the fields such as petroleum and petrochemical industry, electric power and harbour.
Optical fiber perimeter security protection is as perimeter security installation of new generation, there is very strong military and civilian value, can be for the safety monitoring of the circumferences such as prison, target of military importance, arm store, can also be for the circumference safety monitoring of the critical facilitys such as nuclear power station, petroleum and petrochemical industry, optical fiber perimeter security protection has mainly adopted optical fibre vibration sensor, by monitoring the border impact of interior environmental stress variation on optical fiber among a small circle, analyze invasion vibration signal, and it is only gone and is judged and warning.
In the prior art, Chinese patent CN200910099463.7 has announced a kind of fully distributed fiber Rayleigh and Raman scattering photon strain, temperature sensor, employing Rayleigh scattering signal carries out stress monitoring, Raman diffused light carries out temperature monitoring, but this scheme stress intensity and fibre loss relation adopt realistic model to calculate, and precision is not high.A kind of distribution type fiber-optic Brillouin sensing device that merges optical fiber Brillouin frequency shifter that Chinese patent CN201010566517.9 announces, employing Brillouin technology realizes the synchro measure of temperature and stress, but this scheme complex structure, cost is expensive.A kind of while measuring vibrations that Chinese patent CN201210059875.X announces and distribution type optical fiber sensing equipment and the method for temperature, adopt Rayleigh from relevant detection and the location vibrating, but positioning precision is poor.
Summary of the invention
The utility model is for the shortcoming and defect existing in prior art, propose a kind of rational in infrastructure, production cost is low, accurately and reliably, be specially adapted to fiber optic temperature vibration transducer and integrated monitoring apparatus that temperature and vibration detect applied environment simultaneously.
The utility model can reach by following measures:
A kind of fiber optic temperature vibration transducer, be provided with thermometric loop, the relevant loop of vibration and location determination loop, it is characterized in that comprising and be provided with thermometric loop, the relevant loop of vibration and location determination loop, it is characterized in that comprising pulsed laser, the 2*2 photo-coupler being connected with pulsed laser output terminal, the first sensor fibre being connected through fibre delay line with 2*2 photo-coupler Yi road output terminal, second wavelength division multiplexer that output terminal is connected of input end and 2*2 photo-coupler, the second sensor fibre being connected with the COM end of wavelength division multiplexer, the anti-Stokes of the Raman dorsad light signal of exporting for receiving the second sensor fibre being successively connected with the output terminal of wavelength division multiplexer respectively, the signal of the anti-Stokes dorsad photoelectricity receiver module of Raman Stokes light signal and Rayleigh scattering signal dorsad, Stokes signal photoelectricity receiver module dorsad, Rayleigh scattering signal photoelectricity receiver module, be connected with the output terminal of 2*2 photo-coupler for receive by the two-way of the first sensor fibre and the second sensor fibre output dorsad Rayleigh scattering signal relevant after the coherent light signal photoelectricity receiver module of signal, respectively with anti-Stokes signal photoelectricity receiver module dorsad, Stokes signal photoelectricity receiver module dorsad, the data acquisition unit that the output terminal of Rayleigh scattering signal photoelectricity receiver module and coherent light signal photoelectricity receiver module is connected.
Described in the utility model, in data acquisition unit, be provided with for receiving anti-Stokes signal photoelectricity receiver module dorsad, Stokes signal photoelectricity receiver module dorsad, the optical receiving circuit dorsad of the electric signal of Rayleigh scattering signal photoelectricity receiver module output, output terminal respectively with pulsed laser, optical receiving circuit dorsad, and the pulsed triggering circuit that is connected of interval Acquisition Circuit, the interval Acquisition Circuit that input end is connected with coherent light signal photoelectricity receiver module, with the accumulation process circuit that optical receiving circuit output terminal is connected dorsad, and respectively with accumulation process circuit, interval Acquisition Circuit is connected uploads circuit.
In the utility model, the centre wavelength of pulse optical fiber can be 1550nm, pulse width 10ns, repetition frequency 10KHz, peak power 20W, spectrum width 0.1nm; 2*2 fiber coupler, corresponding centre wavelength is 1550nm, splitting ratio is 50:50, insertion loss <0.7dB; Corresponding wavelength division multiplexer is by the anti Stokes scattering of the Raman dorsad light wideband filtered sheet of centre wavelength 1450nm, the Stokes ratio of Raman dorsad wideband filtered sheet and the Rayleigh scattered light filter plate of centre wavelength 1660nm, and the 1*2 coupling mechanism being connected with Rayleigh scattered light filter plate forms; Data acquisition unit, sampling rate is divided into 100MSPS and 10KSPS, and analog input channel number corresponding to 100MSPS sampling rate is that analog input channel number corresponding to 3,10KMSPS sampling rate is that 1, ADC precision is 12bits.
The route of firing ring described in the utility model pulsed laser, wavelength division multiplexer, the second sensor fibre, dorsad anti-Stokes photoelectricity receiver module, Stokes photoelectricity receiver module and data acquisition unit form dorsad.
The relevant loop of vibration described in the utility model is by pulsed laser, 2*2 coupling mechanism, fibre delay line, wavelength division multiplexer, the first sensor fibre, Rayleigh scattering signal photoelectricity receiver module and data acquisition unit form dorsad.
Location determination circuit described in the utility model is comprised of pulsed laser, wavelength division multiplexer, the first sensor fibre, the second sensor fibre, photoelectricity receiver module and data acquisition unit.
Data acquisition unit described in the utility model is receiving Raman stokes light dorsad, sample frequency and the pulse width of Raman anti-Stokes light and Rayleigh scattering signal signal receiving circuit have following relation: S dorsad sf=100/X, in: S sffor sample frequency, unit: MSPS, X is pulse width, unit is ns.
Data acquisition unit described in the utility model has following relation: S in the sample frequency and the pulse width that receive Rayleigh coherent light signal receiving circuit rf=100/X, wherein: S rffor sample frequency, unit: KSPS, X is pulse width, unit is ns.
The utility model pulse width and sensor repetition frequency and measuring distance have following relation: fs=100/X, Ls=100/X, wherein: f sfor repetition frequency, unit: KHz, L sfor measuring distance, unit is Km, and X is pulse width, and unit is ns.
In the utility model, thermometric loop obtains the temperature information in region to be measured according to following principle: when incident laser and optical fiber molecule generation nonlinear interaction scattering, emit a phonon and become Stokes ratio, absorbing a phonon becomes anti-Stokes Raman scattering photon, and the Phonon frequency of optical fiber molecule is 13.2THz.Boltzmann's law is obeyed in population heat distribution on fine molecular entergy level, strength ratio R (T) and the temperature correlation of anti-Stokes Raman diffused light and Stokes Raman diffused light, and its expression formula is:
Wherein: V aS, V sthe frequency that is respectively minute Stokes Raman scattering photon and Stokes Raman scattering photon, h is Planck's constant, and △ V is the Phonon frequency of optical fiber molecule, and k is Boltzmann constant, and T is Kelvin's absolute temperature.
In the utility model, the relevant loop of vibration obtains vibration data according to following principle:
After incident laser and optical fiber molecule generation elastic collision, with the rear orientation light of incident light same frequency be Rayleigh scattering light, the Rayleigh scattering light that meets coherent condition produces the interference of light at the place of meeting, because phase differential causes the redistribution of light intensity, by the vibration in the intensity monitor external world.
In the utility model, location determination loop obtains position location data according to following principle: after incident laser and optical fiber molecule generation elastic collision, with the rear orientation light of incident light same frequency be Rayleigh scattering light, Rayleigh scattering light counter stress is responsive, when having vibration, the external world will produce added losses to Rayleigh scattering signal, cause the variation of light intensity, the position can release event occurring by monitoring light intensity, thus position.Based on OTDR technology, by measuring scattering pulse, return to the mistiming △ t that incident end and laser pulse set out and calculate the position L of vibration x, its expression formula is:
, in: L xfor the position of vibration, c is the light velocity in vacuum, the refractive index that n is optical fiber.
The utility model compared with prior art, has following beneficial effect:
The utility model adopts a set of light path device, has realized the long synchronous sensing apart from temperature and vibration, greatly reduces cost; Adopt the thermally sensitive characteristic of Raman light, monitor temperature and variation thereof; Adopt Rayleigh coherent detection technology, there is higher vibration detection sensitivity; Adopt Rayleigh scattering signal counter stress sensitivity characteristic, identify vibration position, realized the position probing to intrusion event.
accompanying drawing explanation:
Accompanying drawing 1 is the structural representation of fiber optic temperature vibration transducer in the utility model.
Accompanying drawing 2 is structural representations of integrated monitoring apparatus in the utility model.
Accompanying drawing 3 is fiber optic temperature vibration transducers and adopt the structural representation of the integrated monitoring apparatus of this sensor in the utility model embodiment 2.
Accompanying drawing 4 is structural representations of the utility model data acquisition unit.
Reference numeral: pulse optical fiber 1, 2*2 coupling mechanism 2, fibre delay line 3, wavelength division multiplexer 4, the first sensor fibre 5, anti-Stokes signal photoelectricity receiver module 6 dorsad, Stokes signal photoelectricity receiver module 7 dorsad, Rayleigh scattering signal photoelectricity receiver module 8, coherent light signal photoelectricity receiver module 9, data acquisition unit 10, industrial computer 11, image intensifer 12, semiconductor laser 13, optical receiving circuit 14 dorsad, accumulation process circuit 15, interval Acquisition Circuit 16, pulsed triggering circuit 17, upload circuit 18, the second sensor fibre 19.
embodiment:
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model proposes a kind of fiber optic temperature vibration transducer, be provided with thermometric loop, the relevant loop of vibration and location determination loop, it is characterized in that comprising pulsed laser 1, the 2*2 photo-coupler 2 being connected with pulsed laser 1 output terminal, the first sensor fibre 5 being connected through fibre delay line 3 with 2*2 photo-coupler 2 Yi road output terminals, the wavelength division multiplexer 4 that input end is connected with second output terminal of 2*2 photo-coupler 2, the second sensor fibre 19 being connected with the COM end of wavelength division multiplexer 4, the anti-Stokes of the Raman dorsad light signal of exporting for receiving the second sensor fibre 19 being successively connected with the output terminal of wavelength division multiplexer 4 respectively, the signal of the anti-Stokes dorsad photoelectricity receiver module 6 of Raman Stokes light signal and Rayleigh scattering signal dorsad, Stokes signal photoelectricity receiver module 7 dorsad, Rayleigh scattering signal photoelectricity receiver module 8, be connected with the output terminal of 2*2 photo-coupler 2 for receive by the two-way of the first sensor fibre 5 and the output of the second sensor fibre 19 dorsad Rayleigh scattering signal relevant after the coherent light signal photoelectricity receiver module 9 of signal, respectively with anti-Stokes signal photoelectricity receiver module 6 dorsad, Stokes signal photoelectricity receiver module 7 dorsad, the data acquisition unit 10 that the output terminal of Rayleigh scattering signal photoelectricity receiver module 8 and coherent light signal photoelectricity receiver module 9 is connected.
Light-pulse generator described in the utility model 1 is used to device that pulsed light is provided; Described 2*2 coupling mechanism 2 is for light-pulse generator being coupled into two-way sensor fibre, and the Rayleigh scattering signal producing in two-way optical fiber is concerned with; Fibre delay line 3 arrives the time of 2*2 coupling mechanism for the Rayleigh scattering signal of adjusting two-way sensor fibre and producing; Dorsad anti-Stokes signal photoelectricity receiver module 6, Stokes signal photoelectricity receiver module 7, Rayleigh scattering signal photoelectricity receiver module 8, coherent light signal photoelectricity receiver module 9 are converted to electric signal for Raman light, Rayleigh scattering signal and the Rayleigh coherent light that optical fiber is produced dorsad; Sensor fibre carries out sensor and the transmission medium of temperature and vibration detection as device; Data acquisition unit 10 is used to device that pulse triggering signal is provided, carries out Raman light, the collection of Rayleigh scattering signal and Rayleigh coherent light; Industrial computer 11 is for data analysis, determine optical fiber temperature along the line, whether invasion and invasion position etc. occur, its data acquisition unit 10 as shown in Figure 4, in described data acquisition unit, be provided with the optical receiving circuit dorsad 14 that input end is connected with the output terminal of the photoelectricity receiver module of backscattering stokes light, backscattering anti-Stokes light and Rayleigh scattering signal, with the accumulation process circuit 15 that optical signal receiving circuit 14 is connected dorsad, what be connected with accumulation process circuit 15 uploads circuit 18 for what accumulation process result is uploaded to industrial computer; Also be provided with input end and the interval Acquisition Circuit 16 that the output terminal of the photoelectricity receiver module of Rayleigh interfere is connected, what be connected with interval Acquisition Circuit 16 uploads circuit 18 for what interval image data result is uploaded to industrial computer; Also be provided with for sending the fixedly pulsed triggering circuit 17 of the pulse signal of repetition frequency to laser instrument 1, pulsed triggering circuit 17 is also connected with interval Acquisition Circuit 16 with optical signal receiving circuit 14.
In the utility model, the centre wavelength of pulse optical fiber 1 can be 1550nm, pulse width 10ns, repetition frequency 10KHz, peak power 20W, spectrum width 0.1nm; The centre wavelength of 2*2 fiber coupler 2 correspondences is 1550nm, and splitting ratio is 50:50, insertion loss <0.7dB; Corresponding wavelength division multiplexer 4 is by the anti Stokes scattering of the Raman dorsad light wideband filtered sheet of centre wavelength 1450nm, the Stokes ratio of Raman dorsad wideband filtered sheet and the Rayleigh scattered light filter plate of centre wavelength 1660nm, and the 1*2 coupling mechanism being connected with Rayleigh scattered light filter plate forms; Data acquisition unit 10 sampling rates are divided into 100MSPS and 10KSPS, and analog input channel number corresponding to 100MSPS sampling rate is that analog input channel number corresponding to 3,10KMSPS sampling rate is that 1, ADC precision is 12bits.
The route of firing ring described in the utility model pulsed laser, wavelength division multiplexer, the second sensor fibre, dorsad anti-Stokes photoelectricity receiver module, Stokes photoelectricity receiver module and data acquisition unit form dorsad; The relevant loop of described vibration is by pulsed laser, 2*2 coupling mechanism, fibre delay line, wavelength division multiplexer, the first sensor fibre, Rayleigh scattering signal photoelectricity receiver module and data acquisition unit form dorsad; Described location determination circuit is comprised of pulsed laser, wavelength division multiplexer, the first sensor fibre, the second sensor fibre, photoelectricity receiver module and data acquisition unit.
Data acquisition unit described in the utility model is receiving Raman stokes light dorsad, sample frequency and the pulse width of Raman anti-Stokes light and Rayleigh scattering signal signal receiving circuit have following relation: S dorsad sf=100/X, in: S sffor sample frequency, unit: MSPS, X is pulse width, unit is ns.
Data acquisition unit described in the utility model has following relation: S in the sample frequency and the pulse width that receive Rayleigh coherent light signal receiving circuit rf=100/X, wherein: S rffor sample frequency, unit: KSPS, X is pulse width, unit is ns.
The utility model pulse width and sensor repetition frequency and measuring distance have following relation: fs=100/X, Ls=100/X, wherein: f sfor repetition frequency, unit: KHz, L sfor measuring distance, unit is Km, and X is pulse width, and unit is ns.
As shown in Figure 2, the utility model also proposes the vibration integrated supervising device of a kind of fiber optic temperature, the fiber optic temperature shock sensor that is provided with industrial computer 11 and is connected with industrial computer 11, it is characterized in that fiber optic temperature vibration transducer adopts said structure, data acquisition unit 10 is uploaded to industrial computer by the Raman scattering signal receiving, Rayleigh signal and Rayleigh coherent signal through usb bus through uploading circuit 18.
In the utility model, thermometric loop obtains the temperature information in region to be measured according to following principle: when incident laser and optical fiber molecule generation nonlinear interaction scattering, emit a phonon and become Stokes ratio, absorbing a phonon becomes anti-Stokes Raman scattering photon, and the Phonon frequency of optical fiber molecule is 13.2THz.Boltzmann's law is obeyed in population heat distribution on fine molecular entergy level, strength ratio R (T) and the temperature correlation of anti-Stokes Raman diffused light and Stokes Raman diffused light, and its expression formula is:
Wherein: V aS, V sthe frequency that is respectively minute Stokes Raman scattering photon and Stokes Raman scattering photon, h is Planck's constant, and △ V is the Phonon frequency of optical fiber molecule, and k is Boltzmann constant, and T is Kelvin's absolute temperature.
embodiment 1:
The present embodiment provides a kind of optical fiber temperature-measurement of temperature and vibration and structural representation of vibration transducer simultaneously measured, as shown in Figure 1, data acquisition unit 10 mono-road pulse triggering signal output terminal is connected with the input end of pulse optical fiber 1, the 1550nm pulsed light of pulse optical fiber 1 output is connected with the 1550nm input end of 2*2 coupling mechanism 2, 2*2 coupling mechanism 2 Yi road output terminals are connected with the input end of fibre delay line 3, the output terminal of fibre delay line 3 is connected with a 5-a optical fiber of optical fiber 5, another road output terminal of 2*2 coupling mechanism 2 is connected with the 1550nm input end of wavelength division multiplexer 4, the com output terminal of wavelength division multiplexer 4 and the second sensor fibre, the Rayleigh scattering signal lease making fibre delay line 3 producing in the first sensor fibre enters 2*2 coupling mechanism 2 Yi road input ends, the anti-Stokes of Raman dorsad producing in the second sensor fibre, stokes scattering signal divides from the 1450nm of wavelength division multiplexer 4 and the output of 1660nm output port, and respectively at photoelectricity receiver module 8, the input end of photoelectricity receiver module 9 is connected, the Rayleigh scattering signal producing in the second sensor fibre is connected with another road input end of photoelectricity receiver module 7 and 2*2 coupling mechanism 2 after wavelength division multiplexer 4, article two, the Rayleigh scattering signal that optical fiber produces is connected with the input end of photoelectricity receiver module 6 after 2*2 coupling mechanism 2 produces interference, photoelectricity receiver module 6, photoelectricity receiver module 7, photoelectricity receiver module 8 is connected with 4 road input ends of data acquisition unit 10 with photoelectricity receiver module 9.
Fig. 2 measures optical fiber temperature-measurement and the vibration transducer of temperature and vibration and adopts the structural representation of the integrated monitoring apparatus of this sensor when being the utility model embodiment, comprise industrial computer 11 and optical fiber temperature-measurement and vibration transducer, data acquisition unit 10 in optical fiber temperature-measurement and vibration transducer is connected with industrial computer 11, data acquisition unit 10 is by the Raman scattering signal receiving, Rayleigh signal and Rayleigh coherent signal are uploaded to industrial computer 11 through usb bus, wherein said optical fiber temperature-measurement and vibration transducer adopt above-mentioned a kind of optical fiber temperature-measurement and vibration transducer that is applicable to simultaneously measure temperature and vibration.
In the present embodiment, light source adopts pulse optical fiber 1, described pulse optical fiber, and centre wavelength is 1550nm, pulse width 10ns, repetition frequency 10KHz, peak power 20W, spectrum width 0.1nm.
In the present embodiment, described 2*2 coupling mechanism 2, centre wavelength 1550nm, splitting ratio is 50:50, insertion loss <0.7dB.
In the present embodiment, described wavelength division multiplexer 4, by the anti Stokes scattering of the Raman dorsad light wideband filtered sheet of centre wavelength 1450nm, the Stokes ratio of Raman dorsad wideband filtered sheet and the Rayleigh scattered light filter plate of centre wavelength 1660nm, and the 1*2 coupling mechanism being connected with Rayleigh scattered light filter plate forms, described 1*2 coupling mechanism splitting ratio is 50:50, insertion loss <0.7dB.
In the present embodiment, described data acquisition unit 10, sampling rate is divided into 100MSPS and 10KSPS, and analog input channel number corresponding to 100MSPS sampling rate is that analog input channel number corresponding to 3,10KMSPS sampling rate is that 1, ADC precision is 12bits.
embodiment 2:
The present embodiment provides another optical fiber temperature-measurement of simultaneously measuring temperature and vibration and vibration transducer and adopts the integrated monitoring apparatus of this sensor, its structural representation as shown in Figure 3, with optical fiber temperature-measurement and the vibration transducer of Fig. 2 structure and adopt the integrated monitoring apparatus of this sensor, difference is: light source adopts semiconductor laser 13 to add image intensifer 12 and realizes, the pulse triggering signal of exporting by data acquisition unit 10 drives semiconductor laser 13 to realize miniwatt pulsed optical signals, miniwatt pulsed light is exported powerful pulsed light after image intensifer 12, this mode has lowered the restriction to light source power, there is the feature that cost is low simultaneously.
In the present embodiment, described semiconductor laser 13, centre wavelength is 1550nm, threshold current 10mA, thermistor 10kohm, spectrum width 0.1nm, power 15mW.
In the present embodiment, described image intensifer 12, amplification pulse width is 1-2us, and repetition frequency is 4-10kHz, and peak power is 1-10W, extinction ratio 40dB.
What the utility model embodiment announced is better embodiment; but its concrete enforcement is not limited to this; those of ordinary skill in the art is very easily according to above-described embodiment; understand spirit of the present utility model; and make different amplifications and variation; only otherwise depart from spirit of the present utility model, within all belonging to protection domain of the present utility model.

Claims (7)

1. a fiber optic temperature vibration transducer, be provided with thermometric loop, the relevant loop of vibration and location determination loop, it is characterized in that comprising and be provided with thermometric loop, the relevant loop of vibration and location determination loop, it is characterized in that comprising pulsed laser, the 2*2 photo-coupler being connected with pulsed laser output terminal, the first sensor fibre being connected through fibre delay line with 2*2 photo-coupler Yi road output terminal, second wavelength division multiplexer that output terminal is connected of input end and 2*2 photo-coupler, the second sensor fibre being connected with the COM end of wavelength division multiplexer, the anti-Stokes of the Raman dorsad light signal of exporting for receiving the second sensor fibre being successively connected with the output terminal of wavelength division multiplexer respectively, the signal of the anti-Stokes dorsad photoelectricity receiver module of Raman Stokes light signal and Rayleigh scattering signal dorsad, Stokes signal photoelectricity receiver module dorsad, Rayleigh scattering signal photoelectricity receiver module, be connected with the output terminal of 2*2 photo-coupler for receive by the two-way of the first sensor fibre and the second sensor fibre output dorsad Rayleigh scattering signal relevant after the coherent light signal photoelectricity receiver module of signal, respectively with anti-Stokes signal photoelectricity receiver module dorsad, Stokes signal photoelectricity receiver module dorsad, the data acquisition unit that the output terminal of Rayleigh scattering signal photoelectricity receiver module and coherent light signal photoelectricity receiver module is connected.
2. a kind of fiber optic temperature vibration transducer according to claim 1, it is characterized in that being provided with for receiving anti-Stokes signal photoelectricity receiver module dorsad in described data acquisition unit, Stokes signal photoelectricity receiver module dorsad, the optical receiving circuit dorsad of the electric signal of Rayleigh scattering signal photoelectricity receiver module output, output terminal respectively with pulsed laser, optical receiving circuit dorsad, and the pulsed triggering circuit that is connected of interval Acquisition Circuit, the interval Acquisition Circuit that input end is connected with coherent light signal photoelectricity receiver module, with the accumulation process circuit that optical receiving circuit output terminal is connected dorsad, and respectively with accumulation process circuit, interval Acquisition Circuit is connected uploads circuit.
3. a kind of fiber optic temperature vibration transducer according to claim 1, the centre wavelength that it is characterized in that pulse optical fiber is 1550nm, pulse width 10ns, repetition frequency 10KHz, peak power 20W, spectrum width 0.1nm; 2*2 fiber coupler, corresponding centre wavelength is 1550nm, splitting ratio is 50:50, insertion loss <0.7dB; Corresponding wavelength division multiplexer is by the anti Stokes scattering of the Raman dorsad light wideband filtered sheet of centre wavelength 1450nm, the Stokes ratio of Raman dorsad wideband filtered sheet and the Rayleigh scattered light filter plate of centre wavelength 1660nm, and the 1*2 coupling mechanism being connected with Rayleigh scattered light filter plate forms; Data acquisition unit, sampling rate is divided into 100MSPS and 10KSPS, and analog input channel number corresponding to 100MSPS sampling rate is that analog input channel number corresponding to 3,10KMSPS sampling rate is that 1, ADC precision is 12bits.
4. a kind of fiber optic temperature vibration transducer according to claim 1, is characterized in that described data acquisition unit is receiving Raman stokes light dorsad, sample frequency and the pulse width of Raman anti-Stokes light and Rayleigh scattering signal signal receiving circuit have following relation: S dorsad sf=100/X, in: S sffor sample frequency, unit: MSPS, X is pulse width, unit is ns.
5. a kind of fiber optic temperature vibration transducer according to claim 1, is characterized in that described data acquisition unit has following relation: S in the sample frequency and the pulse width that receive Rayleigh coherent light signal receiving circuit rf=100/X, wherein: S rffor sample frequency, unit: KSPS, X is pulse width, unit is ns.
6. a kind of fiber optic temperature vibration transducer according to claim 1, is characterized in that pulse width and sensor repetition frequency and measuring distance have following relation: fs=100/X, Ls=100/X, wherein: f sfor repetition frequency, unit: KHz, L sfor measuring distance, unit is Km, and X is pulse width, and unit is ns.
7. the vibration integrated supervising device of fiber optic temperature, the fiber optic temperature shock sensor that is provided with industrial computer and is connected with industrial computer, it is characterized in that fiber optic temperature vibration transducer is for as described in any one in claim 1-6, data acquisition unit is uploaded to industrial computer by the Raman scattering signal receiving, Rayleigh signal and Rayleigh coherent signal through usb bus through uploading circuit.
CN201320787146.6U 2013-12-04 2013-12-04 Optical fiber temperature and vibration sensor and comprehensive monitoring device Withdrawn - After Issue CN203572595U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103616089A (en) * 2013-12-04 2014-03-05 威海北洋电气集团股份有限公司 Optical fiber temperature vibration sensor and comprehensive monitoring system and method
CN105021307A (en) * 2015-07-11 2015-11-04 苏州至禅光纤传感技术有限公司 Method for realizing all-fiber distributed multi-parameter sensing
CN104198030B (en) * 2014-08-29 2017-11-10 中国石油天然气股份有限公司 Multichannel method for detecting vibration and its detecting system based on coherent rayleigh scattering
CN110793616A (en) * 2019-10-25 2020-02-14 深圳第三代半导体研究院 All-fiber distributed cable safety and reliability monitoring system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103616089A (en) * 2013-12-04 2014-03-05 威海北洋电气集团股份有限公司 Optical fiber temperature vibration sensor and comprehensive monitoring system and method
CN103616089B (en) * 2013-12-04 2017-10-13 威海北洋电气集团股份有限公司 A kind of optical fiber temperature vibration sensor and comprehensive monitoring system and method
CN104198030B (en) * 2014-08-29 2017-11-10 中国石油天然气股份有限公司 Multichannel method for detecting vibration and its detecting system based on coherent rayleigh scattering
CN105021307A (en) * 2015-07-11 2015-11-04 苏州至禅光纤传感技术有限公司 Method for realizing all-fiber distributed multi-parameter sensing
CN110793616A (en) * 2019-10-25 2020-02-14 深圳第三代半导体研究院 All-fiber distributed cable safety and reliability monitoring system

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