CN102607608A - Extensible electro-optical sensing system - Google Patents
Extensible electro-optical sensing system Download PDFInfo
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- CN102607608A CN102607608A CN2012100595215A CN201210059521A CN102607608A CN 102607608 A CN102607608 A CN 102607608A CN 2012100595215 A CN2012100595215 A CN 2012100595215A CN 201210059521 A CN201210059521 A CN 201210059521A CN 102607608 A CN102607608 A CN 102607608A
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Abstract
The invention relates to an extensible electro-optical sensing system, which comprises a tunable laser, the driving control circuit of the tunable laser, an extensible optical fiber electro-optical sensing network, an electro-optical receiving system, the driving control circuit of the electro-optical receiving system, a synchronizing system and a sensing signal analyzing and processing system, wherein the output of the tunable laser is connected to the extensible optical fiber electro-optical sensing network; the output of the extensible optical fiber electro-optical sensing network is connected to the electro-optical receiving system; the synchronizing system is connected to the driving control circuit of the tunable laser and the driving control circuit of the electro-optical receiving system; and the output of the synchronizing system is connected to the sensing signal analyzing and processing system. The extensible electro-optical sensing system is formed by taking the bandwidth tunable laser as a light source combined with a light wavelength division multiplexing device, an electronic sensor and a variable optical attenuator, so that the system is easy to extend, the application range of the sensor is enlarged. The extensible electro-optical sensing system has the characteristics of wide application range, low cost and the like, is easy to install and produce, and is especially suitable for application requirements for large range, long distance and monitoring of various environment parameters.
Description
Technical field
The invention belongs to photoelectric field, especially a kind of electric light sensor-based system of expanding.
Background technology
Electronic sensor systems can change physical quantity or chemical quantitative changeization into voltage or the magnitude of current with various, and its technological comparative maturity also has a wide range of applications.But; Carry out in transmission of remote recording signal and the systems such as sensing measurement of controlling or security alarm at needs; The transmission system of electronic sensor often receives the interference of external environments such as electromagnetism easily, and simultaneously, the conditional electronic sensing system also is difficult to constitute sensing network.Along with the development of fiber optics and optical-fibre communications, optical fiber sensing system has obtained fast development, and in optical fiber communication technology, particularly the high density light WDM technology begins to be applied to optical fiber sensing system.Optical fiber sensing system has anti-electromagnetic interference (EMI) and characteristics such as moist, corrosion-resistant, in light weight, and, the transmission that is easy to form sensing network He carries out the remote recording signal.The shortcoming that optical fiber sensing system exists is: Fibre Optical Sensor and signal processing system are somewhat expensive; The lower or very difficult making corresponding light of measuring accuracy fiber sensor to some physics or chemistry amount goes test; Therefore, to be far from traditional electronic sensor system extensive in the Application in Sensing field of existing Fibre Optical Sensor and system.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, provide a kind of photoelectric sense technology to combine and be easy to form the electric light the expanded sensor-based system of sensing network and long-distance transmissions.
The present invention solves existing technical matters and takes following technical scheme to realize:
A kind of electric light sensor-based system of expanding, comprise a tunable laser and Drive and Control Circuit thereof, one can expand optical fiber electric light sensing network, photoelectric receiving system and Drive and Control Circuit, a synchro system and a transducing signal analysis process system; The output of described tunable laser is connected to can expand optical fiber electric light sensing network; The described output of expanding optical fiber electric light sensing network is connected to photoelectric receiving system; Described synchro system is connected to the Drive and Control Circuit of tunable laser and the Drive and Control Circuit of photoelectric receiving system, and the output of described synchro system is connected to the transducing signal analysis process system.
And the described optical fiber electric light sensing network of expanding comprises one or more single channel optical fiber electric light sensor-based systems of expanding.
And; The described single channel optical fiber electric light sensor-based system of expanding comprises an OWDM separation vessel, an electric light sensor-based system and an OWDM compositor; The input port of described OWDM separation vessel is connected on the tunable laser; The output port of OWDM separation vessel is connected to the input port of electric light sensor-based system, and the reflector port of OWDM separation vessel is connected to the input port of the electric light sensor-based system of next channel; The output port of electric light sensor-based system is connected to the first input end mouth of described OWDM compositor, and second input port of OWDM compositor is connected to second input port of the electric light sensor-based system of next channel.
And the electric arc through single-mode fiber between described OWDM separation vessel, electric light sensor-based system, the OWDM compositor melts welding or joints of optical fibre connection.
And; Described electric light sensor-based system is connected and composed by electronic sensor system and adjustable optical attenuator; Described electronic sensor system comprises an electronic sensor and driving circuit and output signal processing circuit; Described adjustable optical attenuator comprises the driving circuit of an optical attenuator and an adjustable optical attenuator; Electronic sensor receives signal after behind the output signal processing circuit, with the output of analog or digital signal form and be connected on the driving circuit of adjustable optical attenuator and through the output port of adjustable optical attenuator and export with the analog or digital signal form.
And described tunable laser is a Distributed Feedback Laser, and it adopts single-mode fiber coupling output to be coupled to can expand optical fiber electric light sensing network.
And the output light frequency of described tunable laser is spaced apart the narrow band light of 200GHz or 100GHz or 50GHz, optical-fibre communications ℃ or L band realize tunable output.
And described OWDM separation vessel is 200GHz, 100GHz or 50GHz high density OWDM separation vessel; Described light wave allocation/synthesizer is 200GHz, 100GHz or 50GHz high density OWDM compositor.
And the spectral response of described adjustable optical attenuator is in 1500～1700 nanometer range, and optical power attenuation is in 0～60dB scope; The response light frequency range of described photoelectric receiving system is in 1500～1700 nanometers.
And described electronic sensor is any sensor that can change external physical quantity or chemistry amount driving circuit and the output signal processing circuit through described electronic sensor into voltage or electric current.
Advantage of the present invention and good effect are:
The present invention is reasonable in design; It adopts the broadband tunable laser device as light source; In conjunction with 200GHz commonly used in the optical-fibre communications or 100GHz or 50GHz high-density optical-fiber light wavelength division multiplexing (DWDM) core devices as sensing network, and utilize the combination of traditional electronic sensor and variable optical attenuator and form, this system is easy to expand; Enlarged the application of sensor scope; Have be widely used, cost is low, be easy to install and characteristics such as production, be particularly suitable for remote, on a large scale with to the application need of a plurality of environment parameters monitorings.
Description of drawings
Fig. 1 is the synoptic diagram of one three port OWDM separation vessel;
Fig. 2 is the synoptic diagram of one three port OWDM compositor;
Fig. 3 is one three port OWDM separation vessel and compositor optical wavelength transmitance synoptic diagram;
Fig. 4 is the synoptic diagram of two adjacent channel incident light waves;
Fig. 5 is the synoptic diagram of an electronic sensor;
Fig. 6 is the synoptic diagram of the adjustable optical attenuator that two ports are arranged of a band optical fiber pigtail;
Fig. 7 is a kind of connection synoptic diagram of electric light sensor-based system;
Fig. 8 is the rough schematic view of Fig. 7;
Fig. 9 is the connection synoptic diagram of an extendible single channel optical fiber electric light sensor-based system;
Figure 10 is the connection synoptic diagram of extendible four channel optical fiber electric light sensing networks;
Figure 11 is the rough schematic view of Figure 10;
Figure 12 is the connection synoptic diagram that can expand optical fiber electric light sensor-based system.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is done further detailed description.
Fig. 1 has provided a kind of synoptic diagram of the OWDM separation vessel 7 with three ports with the single-mode fiber tail optical fiber; This OWDM separation vessel 7 is provided with incident port 2, reflector port 4 and transmission port 6, and the optical fiber pigtail of three ports of this OWDM separation vessel 7 is single-mode fiber.
Fig. 2 has provided a kind of synoptic diagram of the OWDM compositor 15 with three ports with the single-mode fiber tail optical fiber; This OWDM compositor 15 comprises first incident port one 0, second incident port one 4 and transmission port one 2, and the optical fiber pigtail of above-mentioned three ports of this OWDM compositor 15 is single-mode fiber.
Fig. 3 has provided the transmitted light frequency spectrum of OWDM separation vessel 7 and OWDM compositor 15.In the figure; The central homology wavelength is λ i; For the ease of purchasing and reducing cost, normal light wavelength-division multiplex separation vessel 7 adopts the device that meets international standard commonly used in the optical-fibre communications with OWDM compositor 15, and its center transmission peak wavelength λ i meets international communication standard (ITU Grid).The bandwidth of transmitted light frequency spectrum 16 selects to depend on all kinds of different application; Like the 200GHz that has that in optical-fibre communications, uses always, the intensive OWDM separation vessel of 100GHz and 50GHz and compositor (DWDM), the light frequency interval delta f of two channels is respectively 200GHz; 100GHz and 50GHz; Or optical wavelength interval delta λ (Fig. 4) is about respectively and is 1.6 nanometers, 0.8 nanometer, 0.4 nanometer.It is about that the transmission bandwidth of the device of above-mentioned three kinds of specifications is respectively: 0.4 nanometer, 0.2 nanometer and 0.1 nanometer.Also depend on the laser instrument output light wavelength stability that adopted and the cross influence in optical frequency road for the requirement of transmission bandwidth.The laser wavelength good stability, just lower to the requirement of transmission bandwidth.Also can use other special parameters to the transmitted light frequency spectrum of OWDM separation vessel 7 and OWDM compositor 15 and the selection of central homology wavelength according to different application requirements.Requirement to incident light wave is to adopt the output of Distributed Feedback Laser (distributed feedback laser) commonly used in the optical-fibre communications as the incident light light source.
Be that the incident light wave of 100GHz is that example describes with corresponding 100GHz OWDM separation vessel 7 with OWDM compositor 15 to adopt spacing below: when incident light is that two wavelength are that the narrow band light of λ i and λ j is behind the input port 2 that is coupled into OWDM separation vessel 7; λ i is through 6 outputs of transmission port, and λ j is through reflector port 4 outputs.When incident light is that two wavelength are after the light of λ i and λ j is coupled to first input port 10 and second input port 14 of OWDM compositor 15 respectively, to have comprised two light that wavelength is λ i and λ j in the output port 12.General OWDM separation vessel 7 can not change the frequency spectrum of importing light with OWDM compositor 15, but luminous power has certain loss, generally should be lower than 0.5dB.Utilize OWDM compositor 15 and OWDM separation vessel 7 easily the multichannel light signal to be coupled in the simple optical fiber, or with the multichannel separate optical signals in the simple optical fiber in multifiber.Adopt these two kinds of devices to constitute optical fiber sensing network easily and realize remote sensing demand, and above-mentioned two kinds of devices are widely used in the optical-fibre communications industry, also can effectively reduce cost.
Fig. 5 has provided the synoptic diagram of a kind of electronic sensor system 27, and this electronic sensor systems comprises electronic sensor 24, driving circuit 22 and output signal processing circuit 26.Electronic sensor 24 is defined as and anyly drives down at electronic circuit, can be the senser element of voltage or change in current form with physics or chemistry amount and change transitions thereof, is the very device of maturation of a kind of technology.
Fig. 6 has provided a kind of synoptic diagram of adjustable optical attenuator 35.This adjustable optical attenuator 35 comprises input port 28, the optical attenuator 32 of being with optical fiber pigtail, output port 34 and the driving circuit 30 of being with optical fiber pigtail.The principle of work of adjustable optical attenuator 35 is: by input port 28 inputs, optical attenuator 32 under the effect of certain voltage or electric current, produces certain decay to input light through driving circuit to light signal through coupling, by output port 34 outputs.The attenuation range of adjustable optical attenuator commonly used can reach 0-50dB, even higher, response speed can from second level near nanosecond order.The kind of optical attenuator 32 have machinery, microelectromechanical-systems (MEMS), liquid crystal with electro-optic crystal or the like.In optical-fibre communications, adjustable optical attenuator has a wide range of applications.In the electric light sensor-based system, adopt this type device commonly used in the optical-fibre communications can not only satisfy requirement, also can reduce cost spectral characteristic.
Describe in the face of each ingredient of the present invention down:
Fig. 7 has provided a kind of synoptic diagram of electric light sensor-based system.This electric light sensor-based system 37 is by electronic sensor system 27 and adjustable optical attenuator 35 be combined intos.Output signal in the electronic sensor system 27 is directly connected to the driving circuit 30 of adjustable optical attenuator 35; This driving circuit 30 has reception and handles from the function of the output signal of output signal processing circuit 26, can drive adjustable optical attenuator 35 through certain signal Processing.Electric light sensor-based system 37 is input to the induction of electronic sensor 24 physics or chemistry amount to external world with the formal transformation of numeral or simulating signal the variation of decay of the light signal of input port 28 effectively in pairs.Fig. 8 is the synoptic diagram of electric light sensor-based system 37 after simplifying, and this electric light sensor-based system 37 comprises the input port 28 and output port 34 of band single-mode fiber tail optical fiber.
Fig. 9 has provided the synoptic diagram of an extendible single channel optical fiber electric light sensor-based system 55.This single channel optical fiber electric light sensor-based system 55 comprises one three port OWDM separation vessel 7, an electric light sensor-based system 37 and one three a port OWDM compositor 15.The output port 6 of OWDM separation vessel 7 and the input port 28 of electric light sensor-based system 37 join; The input port 10 of OWDM compositor 15 and the output port 34 of electric light sensor-based system 37 join.Because output port 6, input port 28, output port 34 and input port 10 are single-mode fiber, two ports generally can connect through the arclight welding or through the joints of optical fibre.The connection optical loss of above-mentioned two kinds of methods of attachment generally is about 0.1dB.Single channel optical fiber electric light sensor-based system 55 is that the input end at electric light sensor-based system 37 has increased an OWDM separation vessel 7, has increased an OWDM compositor 15 at the output terminal of system 37, can realize the expansion of this system.The principle of work of this single channel optical fiber electric light sensor-based system 55 is following: optical wavelength is that the arrowband light wave of λ i is imported by incident port 2; See through OWDM separation vessel 7 after electric light sensor-based system 37; After being input to OWDM compositor 15 again, by output port 12 outputs.Reflector port 4 is two ECP Extended Capabilities Ports with incident port one 4, is used to be connected to next system.
Figure 10 has provided the synoptic diagram that one four channel can be expanded optical fiber electric light sensing network 99.This electric light sensing network 99 is made up of four single channel optical fiber electric light sensor-based systems 55 with different central homology light frequencies.The input port of the reflector port of the OWDM separation vessel of upper level and the OWDM separation vessel of next stage is connected; The output port of second input port of the OWDM compositor of upper level and the OWDM compositor of next stage is connected, and generally can welding or pass through the joints of optical fibre through arclight of two ports connects.The principle of work of electric light sensing network 99 is: four centre frequencies are λ i, λ j, λ k and λ l; The light wave that light frequency is spaced apart 100GHz is input to input port 2; After light wave λ i sees through OWDM separation vessel 7; Behind electric light sensor-based system 37, again through behind the OWDM compositor 15, by output port 12 outputs.Light wave λ j, λ k, λ l go forward side by side into the input port 42 of OWDM separation vessel 46 through reflector port 4 outputs of OWDM separation vessel 7.After light wave λ j sees through OWDM separation vessel 46; Behind electric light sensor-based system 52, again through behind the OWDM compositor 58, after output port 60 outputs; Get into second input port 14 of OWDM compositor again, through output port 12 outputs of OWDM compositor 15.Other two light wave λ k, λ l with λ i and the same mode of λ j, respectively through OWDM separation vessel 68 and 90, electric light sensor-based system 74 and 92, OWDM compositor 86 and 102.Light wave λ k after OWDM compositor 58 and 15 reflections, gets into output port 12 by output port 82 outputs.Light wave λ l is by output port 104 outputs; Through OWDM compositor 86; After 58 and 15 reflections, at last by output port 12 outputs, electric light sensor-based system 37 has been represented in above-mentioned four variations by light wave λ i, λ j, λ k and the λ l luminous power of output port 12 outputs respectively; The variation of 52,74 and 96 physics responded to external world or chemistry amount.Output port 88 is the ECP Extended Capabilities Ports that are used to be connected next sensor-based system with input port 106.Because very little in the loss of light in optical fiber of C band and L band (optical wavelength range is about the 1520-1610 nanometer), (be about: the 0.1dB/100 km), therefore, the present invention is easy to realize remote, the application of the sensing monitoring of large tracts of land and multiple spot.Notice, λ j, λ k, the light of λ l, because repeatedly reflection, the loss of luminous power is bigger than the optical loss of λ i.So the loss of the luminous power of four channel incident lights is followed successively by from small to large: λ i, λ j, λ k, λ l.This is a principal element of the extendible total sensing channel number of restriction.
Figure 11 has provided and can expand the synoptic diagram of four channel optical fiber photoelectric sensing networks 99 through simplifying; This multichannel light wave that can expand in the four channel optical fiber photoelectric sensing networks is imported by input port 2; Through being exported by output port 12 behind the sensing network, port 88 and 106 is an ECP Extended Capabilities Port.
In the face of constituting, system of the present invention describes down:
Figure 12 has provided the synoptic diagram that can expand optical fiber electric light sensor-based system 119.This can expand optical fiber electric light sensor-based system 119 by tunable laser 108 and driving control system 112 thereof, can expand optical fiber electric light sensing network 99, photoelectric receiving system 110 and driving control system 116 thereof, synchro system 114 and transducing signal analysis process system 118 and connect and compose.The tunable laser 108 that has in the market can realize that light frequency is spaced apart 200GHz at optical-fibre communications C (being about the 1520-1570 nanometer wavelength range) or L-band (being about the 1570-1610 nanometer wavelength range); The tunable output of 100GHz and 50GHz; General Output optical power can reach 20 milliwatts; The tuned speed of two channels can reach a millisecond magnitude, and output generally is by single-mode fiber coupling output.The output of tunable laser 108 utilizes the connection (connected mode can be the connection that the electric arc used always melts the welding or the joints of optical fibre) of optical fiber to be coupled to the input port 2 that can expand optical fiber electric light sensing network 99; Light wave by output port 12 outputs is coupled to photoelectric receiving system 110; Driving control system 116 converts light signal to electric signal; Realize that by synchro system 114 output of tunable laser 108 and the electric signal of photoelectric receiving system 116 outputs carry out synchronously through the Drive and Control Circuit 112 of tunable laser 108 and the Drive and Control Circuit 116 of photoelectric receiving system 110 again, make each channel light signal with change after the sensing network of electric signal correspondence corresponding channel.Final output signal is carried out the analyzing and processing of sensing data by transducing signal analysis process system 118.System 119 has adopted single tunable laser and single photoelectricity to accept system to make the cost of system and size reduce greatly, and can under the situation that does not change existing optical fiber sensing network, carry out the expansion or the minimizing of single or a plurality of sensing channels.
It is emphasized that; Embodiment of the present invention is illustrative; Rather than it is determinate; Therefore the present invention is not limited to the embodiment described in the embodiment, and every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope that the present invention protects equally.
Claims (10)
1. can expand the electric light sensor-based system for one kind, it is characterized in that: comprise a tunable laser and Drive and Control Circuit thereof, one can expand optical fiber electric light sensing network, photoelectric receiving system and Drive and Control Circuit, a synchro system and a transducing signal analysis process system; The output of described tunable laser is connected to can expand optical fiber electric light sensing network; The described output of expanding optical fiber electric light sensing network is connected to photoelectric receiving system; Described synchro system is connected to the Drive and Control Circuit of tunable laser and the Drive and Control Circuit of photoelectric receiving system, and the output of described synchro system is connected to the transducing signal analysis process system.
2. the electric light sensor-based system of expanding according to claim 1 is characterized in that: the described optical fiber electric light sensing network of expanding comprises one or more single channel optical fiber electric light sensor-based systems of expanding.
3. the electric light sensor-based system of expanding according to claim 2; It is characterized in that: the described single channel optical fiber electric light sensor-based system of expanding comprises an OWDM separation vessel, an electric light sensor-based system and an OWDM compositor; The input port of described OWDM separation vessel is connected on the tunable laser; The output port of OWDM separation vessel is connected to the input port of electric light sensor-based system, and the reflector port of OWDM separation vessel is connected to the input port of the electric light sensor-based system of next channel; The output port of electric light sensor-based system is connected to the first input end mouth of described OWDM compositor, and second input port of OWDM compositor is connected to second input port of the electric light sensor-based system of next channel.
4. the electric light sensor-based system of expanding according to claim 3 is characterized in that: the electric arc through single-mode fiber between described OWDM separation vessel, electric light sensor-based system, the OWDM compositor melts welding or joints of optical fibre connection.
5. according to claim 3 or the 4 described electric light sensor-based systems of expanding; It is characterized in that: described electric light sensor-based system is connected and composed by electronic sensor system and adjustable optical attenuator; Described electronic sensor system comprises an electronic sensor and driving circuit and output signal processing circuit; Described adjustable optical attenuator comprises the driving circuit of an optical attenuator and an adjustable optical attenuator; Electronic sensor receives signal after behind the output signal processing circuit, with the output of analog or digital signal form and be connected on the driving circuit of adjustable optical attenuator and through the output port of adjustable optical attenuator and export with the analog or digital signal form.
6. the electric light sensor-based system of expanding according to claim 1 is characterized in that: described tunable laser is a Distributed Feedback Laser, and it adopts single-mode fiber coupling output to be coupled to can expand optical fiber electric light sensing network.
7. the electric light sensor-based system of expanding according to claim 6, it is characterized in that: the output light frequency of described tunable laser is spaced apart the narrow band light of 200GHz or 100GHz or 50GHz, realizes tunable output at the C or the L band of optical-fibre communications.
8. according to claim 3 or the 4 described electric light sensor-based systems of expanding, it is characterized in that: described OWDM separation vessel is 200GHz, 100GHz or 50GHz high density OWDM separation vessel; Described light wave allocation/synthesizer is 200GHz, 100GHz or 50GHz high density OWDM compositor.
9. the electric light sensor-based system of expanding according to claim 5 is characterized in that: the spectral response of described adjustable optical attenuator is in 1500～1700 nanometer range, and optical power attenuation is in 0～60dB scope; The response light frequency range of described photoelectric receiving system is in 1500～1700 nanometers.
10. the electric light sensor-based system of expanding according to claim 5 is characterized in that: described electronic sensor is any sensor that can change external physical quantity or chemistry amount driving circuit and the output signal processing circuit through described electronic sensor into voltage or electric current.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5696857A (en) * | 1996-07-25 | 1997-12-09 | Litton Systems, Inc. | WDM/FDM fiber optic sensor architecture using WDM tap coupler |
| US5796504A (en) * | 1996-03-13 | 1998-08-18 | Hughes Electronics | Fiber-optic telemetry system and method for large arrays of sensors |
| US7323677B1 (en) * | 2004-07-15 | 2008-01-29 | Mississippi State University | Fiber-bragg grating-loop ringdown method and apparatus |
| CN101298992A (en) * | 2008-06-05 | 2008-11-05 | 西北工业大学 | Distributed type fiber optic sensor based on optical fiber cavity attenuation and vibration technique |
| CN101793821A (en) * | 2010-03-23 | 2010-08-04 | 北京交通大学 | Sensing system used for monitoring multipoint gas concentration |
| CN101975769A (en) * | 2010-09-17 | 2011-02-16 | 福建师范大学 | Human tissue autofluorescence detection system based on excitation of light sources with different wavelength |
-
2012
- 2012-03-08 CN CN2012100595215A patent/CN102607608A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5796504A (en) * | 1996-03-13 | 1998-08-18 | Hughes Electronics | Fiber-optic telemetry system and method for large arrays of sensors |
| US5696857A (en) * | 1996-07-25 | 1997-12-09 | Litton Systems, Inc. | WDM/FDM fiber optic sensor architecture using WDM tap coupler |
| US7323677B1 (en) * | 2004-07-15 | 2008-01-29 | Mississippi State University | Fiber-bragg grating-loop ringdown method and apparatus |
| CN101298992A (en) * | 2008-06-05 | 2008-11-05 | 西北工业大学 | Distributed type fiber optic sensor based on optical fiber cavity attenuation and vibration technique |
| CN101793821A (en) * | 2010-03-23 | 2010-08-04 | 北京交通大学 | Sensing system used for monitoring multipoint gas concentration |
| CN101975769A (en) * | 2010-09-17 | 2011-02-16 | 福建师范大学 | Human tissue autofluorescence detection system based on excitation of light sources with different wavelength |
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Application publication date: 20120725 |