CN108375555A - Optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and system - Google Patents
Optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and system Download PDFInfo
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- CN108375555A CN108375555A CN201810167657.5A CN201810167657A CN108375555A CN 108375555 A CN108375555 A CN 108375555A CN 201810167657 A CN201810167657 A CN 201810167657A CN 108375555 A CN108375555 A CN 108375555A
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Abstract
The present invention relates to a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and systems, the system includes optical fiber multiple spot photo-electric methane transducer, and sensor includes VCSEL lasers, optical fiber methane sensing module, fiber optic splitter, is used for signal transmitting and received signal processing unit.The system is one can be implemented at a distance by optical fiber connection, the methane sensing system of multichannel (or more test points), it states optical signal launch and connects fiber beam splitting device with the signal processing apparatus of receiving, the optical signal of the signal processing apparatus transmitting of the optical signal launch and receiving is assigned to each optical-fibre channel by the fiber beam splitting device and is transmitted to the corresponding optical fiber methane sensing module for being set to different test points.The present invention not only increases the integrated level of detection system, and the coverage area that can be detected has also been enlarged, and improves the adaptability that the system uses under different occasions, while also reducing production and processing cost.
Description
Technical field
The invention belongs to the technical fields of laser spectrum methane transducer, and mould is sensed more particularly, to a kind of optical fiber methane
Block, optical fiber multiple spot photo-electric methane transducer and system.
Background technology
In recent years, with the continuous propulsion of Urbanization Process In China, requirement of the people to living environment and production safety is increasingly
It improves.Therefore, the demand that people monitor various potential danger sources is also continuously increased.Such as Urban Underground piping lane, sewers,
A large amount of Coal Stack Yards, the place such as garbage stacking yard have the random appearance of biogas and gas, constitute potential danger source.It can be to this
A little danger sources carry out on a large scale, and effectively and detection in real time has become the market demand being increasingly enhanced.
In numerous CH_4 detection technologies, the light of methane content and concentration is measured based on infrared laser spectroscopy principle of absorption
Power technology has measurement concentration range big, high certainty of measurement, does not need the excellent characteristics such as correction time length, makes laser spectrum first
Alkane sensor can be widely applied to different production processes and safety precaution field.
It includes Infrared spectra adsorption type and infrared laser spectroscopy absorption-type that optical spectra, which absorbs methane transducer,.Due to difference
Methane has its different characteristic spectrum absorption peak in infrared region, when tested methane passes through infrared light or infrared laser, light intensity
Degree goes out in characteristic spectrum absorption peak to be modulated by tested methane, and the concentration of the amplitude of light intensity modulation and tested methane is directly proportional,
Therefore changed by the light intensity that detection and analysis infrared absorption peak goes out, it can be to the Concentration Testing of tested methane.
In contrast, optical spectra, which absorbs methane transducer tool, relatively high anti-methane cross jamming ability, especially swashs
Light spectrum methane transducer has good anti-methane cross jamming ability.In conjunction with modern electron process technology, these sensings
Device can realize the function to the follow-on test, automatic running that are tested methane；With automatically correcting, high certainty of measurement, when reaction
Between fast characteristic.This kind of sensor can be used for many industrial processes, such as in petrochemical industry, mining, semi-conductor industry industrial and mineral
Production detection and alarm, such as hydrogen sulfide, oxygen, carbon monoxide, carbon dioxide, chlorine, methane and flammable hydrocarbon
Etc. being to predominantly detect methane.And main application when detecting phosphorus, arsenic and silane and other items then in semi-conductor industry.These sensors
It can be used for safety detection and the alarm of public environment and home environment.Mainly for detection of coal gas in family, natural gas and
The leakage and safety instruction of liquefied gas are alarmed.
However, general single-point type methane transducer is detected to the methane for placing sensor proximity space, and it is right
In large area, the practical measurement scene of long range then requires a large amount of point type photo-electric methane transducer forming a standard point
The multichannel or multiple spot photo-electric methane transducer system of cloth.The complexity of measuring system is thus greatly improved, and
Whole system power consumption is increased, as a result increases the production cost of system and maintenance cost.Therefore, can meet gas detection and
The monitoring and control requirement of multiple spot many reference amounts gas in industrial stokehold, and the cost of whole system can be reduced, simplify system
Light source and signal detection processing system enhance system reliability, are the art urgent problems to be solved.
In conclusion how to be detected in the prior art to the methane gas under large area long range measurements environment, together
When meet low cost, high reliability the problem of, still lack effective solution.
Invention content
For the deficiencies in the prior art, solve existing in the prior art how to large area long range measurements ring
Methane gas under border is detected, at the same meet low cost, high reliability the problem of, the present invention provides a kind of optical fiber methanes
Sensing module, optical fiber multiple spot photo-electric methane transducer and system, the multichannel optical fiber methane sensing system not only increase spy
The coverage area that can be detected has also been enlarged in the integrated level of examining system, improves the adaptation that the system uses under different occasions
Property, while reducing production and processing cost.
The first object of the present invention is to provide a kind of optical fiber methane sensing module.
To achieve the goals above, the present invention is using a kind of following technical solution：
A kind of optical fiber methane sensing module, including：
Shell with accommodation space is equipped with incoming fiber optic and picks out optical fiber inside the housing, the incoming fiber optic and connects
Go out at least two gas sensing gas chambers being mutually parallel between optical fiber, is connected by optical fiber between the gas sensing gas chamber, according to
The gentle room emergent light conversion of gas chamber incidence optical conversion element is respectively set before and after the gas sensing gas chamber for optical signal transmission direction
Unit；
The outgoing beam of optical fiber is become collimated light beam and injects the gas sensing by the gas chamber incidence optical conversion element
The outgoing beam of the gas sensing gas chamber is coupled into the connection gas sensing by gas chamber, the gas chamber outgoing optical conversion element
The optical fiber of gas chamber picks out optical fiber.
Scheme as a further preference, the gas chamber incidence optical conversion element use optical fiber parallel light lens.
Scheme as a further preference, the gas chamber outgoing optical conversion element use fiber focus lens.
Scheme as a further preference, the gas sensing gas chamber side are arranged several ventholes, on the venthole
Metal screen is set.
Scheme as a further preference, the shell include shell, and upper cover and lower cover is respectively set up and down in the shell,
The structure with accommodation space is formed, through-hole is set on the upper lid, the incoming fiber optic and picks out optical fiber via the through-hole, institute
State the calibration mouth for being provided with through-hole on lower lid, powder metallurgy strainer be set above the calibration mouth, the shell and lower cover it
Between plug is set.
Scheme as a further preference, the metal screen that the interior setting of the upper cover can replace.
Scheme as a further preference is provided with the reference gas chamber of temperature and pressure transmitter in the shell.
The second object of the present invention is to provide a kind of optical fiber multiple spot photo-electric methane transducer, using above-mentioned optical fiber methane
Sensing module.
To achieve the goals above, the present invention is using a kind of following technical solution：
A kind of optical fiber multiple spot photo-electric methane transducer, including：Several optical fiber methane sensing modules, fiber beam splitting device
And the signal processing apparatus of optical signal launch and receiving；The optical signal launch connects optical fiber with the signal processing apparatus of receiving
The optical signal of the signal processing apparatus transmitting of beam splitting arrangement, the optical signal launch and receiving passes through the fiber beam splitting device quilt
It is assigned to each optical-fibre channel and is transmitted to the corresponding optical fiber methane sensing module for being set to different test points.
Scheme as a further preference, the fiber beam splitting device are divided using a 1XN fiber splitter, a CWDM
Light device or multiple fiber couplers.
Scheme as a further preference, the light splitting ratio of the fiber beam splitting device be evenly distributed on each channel it
Between；
Or it is distributed between each channel according to the distance between test point adjustment where optical fiber methane sensing module
It is divided ratio, the optical signal light intensity that channel is distributed is directly proportional to the passage length.
The signal processing apparatus of scheme as a further preference, the optical signal launch and receiving includes microprocessor mould
Block, the microprocessor module are separately connected light source module and light signal collection module, the microprocessor by communication module
Module, communication module, light source module are connected with power module respectively with light signal collection module；
The microprocessor module is for tuning light source die light signal in the block and handling the light signal collection
Mould measuring signal in the block；
The communication module is used to transmit in the control instruction and the light signal collection module of the microprocessor module
Measuring signal.
Scheme as a further preference, the environmental condition in the optical fiber methane sensing module and the optical signal launch
With as the environmental condition of the signal processing apparatus of receiving or in the case of, the microprocessor module receives the light source
The temperature, pressure information of module, for the compensation to being tested gas.
Scheme as a further preference, the light source module use VCSEL lasers.
The third object of the present invention is to provide a kind of optical fiber multiple spot photo-electric methane transducer system, using above-mentioned one kind
Optical fiber multiple spot photo-electric methane transducer.
Beneficial effects of the present invention：
1, a kind of optical fiber methane sensing module of the present invention, optical fiber multiple spot photo-electric methane transducer and system, are adopted
With uncharged methane transducer module, each module is set to be placed on any region being potentially dangerous, such as high
There is human body in electromagnetic radiation region, inflammable and explosive region in the region etc. of potential hazard.
2, invention a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and the system uses
Passive optical-fiber network structure, each methane transducer module are connected by optical fiber, and each measurement point is allow flexibly to be arranged, and
According to the different arbitrary placements of the distance of measurement point.
3, invention a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and the system, in first
The series design that two or more gas chambers are used in the optical fiber methane sensing module of alkane sensor, not only reduces sensor
Volume, and absorption light path is also increased, be conducive to improve detection signal-to-noise ratio and measurement accuracy measurement sensitivity.
4, invention a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and the system uses
VCSEL lasers in the case where not increasing system power dissipation realize fine multiple spot photo-electric methane sensing measurement.
Description of the drawings
Fig. 1 is the structural schematic diagram of the optical fiber methane sensing module of the present invention；
Fig. 2 is the shell mechanism schematic diagram of the optical fiber methane sensing module of the present invention；
Fig. 3 is the structural schematic diagram of the beam splitter device of the present invention；
Fig. 4 is the schematic diagram of the optical signal launch of the present invention and the signal processing apparatus of receiving；
Fig. 5 is the system schematic of the present invention.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings：
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific implementation mode, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As background proposition, if formed on a large scale using existing single-point type laser methane sensor, long range
CH_4 detection system, will greatly improve the complexity of measuring system, and increase whole system power consumption, as a result make system
Production cost and maintenance cost increase.
For the deficiencies in the prior art, solve existing in the prior art how to large area long range measurements ring
Methane gas under border is detected, at the same meet low cost, high reliability the problem of, the present invention provides a kind of optical fiber methanes
Sensing module, optical fiber multiple spot photo-electric methane transducer and system, the multichannel optical fiber methane sensing system not only increase spy
The coverage area that can be detected has also been enlarged in the integrated level of examining system, improves the adaptation that the system uses under different occasions
Property, while reducing production and processing cost.
Embodiment 1：
The purpose of the present embodiment 1 is to provide a kind of optical fiber methane sensing module.
To achieve the goals above, the present invention is using a kind of following technical solution：
As depicted in figs. 1 and 2,
A kind of optical fiber methane sensing module, including：
Shell with accommodation space is equipped with incoming fiber optic and picks out optical fiber inside the housing, the incoming fiber optic and connects
Go out at least two gas sensing gas chambers being mutually parallel between optical fiber, is connected by optical fiber between the gas sensing gas chamber, according to
The gentle room emergent light conversion of gas chamber incidence optical conversion element is respectively set before and after the gas sensing gas chamber for optical signal transmission direction
Unit；
The outgoing beam of optical fiber is become collimated light beam and injects the gas sensing by the gas chamber incidence optical conversion element
The outgoing beam of the gas sensing gas chamber is coupled into the connection gas sensing by gas chamber, the gas chamber outgoing optical conversion element
The optical fiber of gas chamber picks out optical fiber.
In the present embodiment, the gas chamber incidence optical conversion element uses optical fiber parallel light lens.The gas chamber emergent light
Converting unit uses fiber focus lens.
For example, the optical fiber methane sensing module of two gas sensing gas chambers of band as shown in Figure 1, be equipped with inside the housing according to
The incoming fiber optic of secondary connection, the first optical fiber parallel light lens, first gas sensing gas chamber, the first fiber focus lens, gas pass
Sense gas chamber connection optical fiber, the second optical fiber parallel light lens, second gas sense gas chamber, the second fiber focus lens and pick out light
Fibre, above-mentioned optical fibre device optical fiber splicer are welded together according to the light path being pre-designed, and are formed a complete gas and are visited
Survey light path.
The present embodiment can also be further improved, and the first gas sensing gas chamber and second gas sensing gas chamber side are set
Several ventholes are set, metal screen is set on the venthole.Tested methane passes through the venthole equipped with metal screen and diffuses into
Enter in the gas sensing gas chamber.
In the present embodiment, the incoming fiber optic can be single mode optical fiber or multimode fibre；The first optical fiber directional light
The outgoing beam of incoming fiber optic is become collimated light beam and injects the first gas sensing gas chamber by lens；From the first gas
The laser beam that sensing gas chamber projects then is coupled into the gas sensing gas chamber by first fiber focus lens and connects optical fiber；From
The laser beam of the outgoing of the gas sensing gas chamber connection optical fiber becomes collimated light beam simultaneously by the second optical fiber parallel light lens
Inject the second gas sensing gas chamber；The laser beam projected from second gas sensing gas chamber is then gathered by second optical fiber
Focus lens are coupled into described pick out in optical fiber；The laser light for becoming to be crossed by being tested gas modulation via above process laser beam
Beam.Then, the optical fiber that picks out will be transferred back to by being tested the laser beam that gas modulation is crossed for optical signal launch and receiving
Signal processing apparatus.
In the optical fiber methane sensing module, the purpose using double gas sensing gas chambers is to increase sensing gas chamber
Light path increases measurement sensitivity, improves measuring accuracy.Fiber design is connected as a result of the gas sensing gas chamber, is made
It obtains 2 air chambers parallel to install, to reduce the volume of the entire optical fiber methane sensing module.It is high in some special measurements
Under required precision, the present invention is (multiple more than two gas chambers, such as three gas chambers, four gas chambers by using more gas chambers
Gas chamber is connected) design, the measurement accuracy of gas detection can further be carried under conditions of not increasing the volume of sensing module
It is high.At this moment, factor needed to be considered is to make complexity, light loss and cost of manufacture.
In the present embodiment, the optical fibre device in all optical fiber methane sensing modules is mounted on one and dedicated has
In the shell of accommodation space, all optical fibre devices are mounted in the methane sensing module specially designed, to control optical fiber
Curvature, and optical fiber is protected not scratched when mounted.After all optical fibre devices are smoothly mounted in module,
The optical fibre device is fixed and sealed according to design scheme using fluid sealant.
It should be noted that the shape of the optical fiber methane sensing module shell can be according to the requirement and application of client
Scene needs to adjust, including but not limited to cylindrical, elliptical cylinder-shape, rectangular shaped post.
As shown in Fig. 2, in the optical fiber methane sensing module, except incoming fiber optic, the first optical fiber parallel light lens, first
Gas sensing gas chamber, the first fiber focus lens, gas sensing gas chamber connection optical fiber, the second optical fiber parallel light lens, the second gas
Body sensing gas chamber, the second fiber focus lens and the mechanical mechanism that picks out other than optical fiber are by upper cover, shell, temperature pressure sensing
The devices compositions such as device, powder metallurgy strainer, plug, lower cover and calibration mouth, the shell includes shell, and the shell is distinguished up and down
Upper cover and lower cover are set, the structure with accommodation space is formed, through-hole is set on the upper lid, the incoming fiber optic and picks out light
Fibre is provided with the calibration mouth of through-hole, powder metallurgy strainer, institute is arranged above the calibration mouth via the through-hole on the lower lid
It states and plug is set between shell and lower cover.
The present embodiment can also be further improved, and the metal screen that can be replaced is arranged in the upper cover.For preventing
Dust, impurity etc. enter the optical element in absorption cell internal contamination light path.
The present embodiment can also be further improved, and the reference gas chamber of temperature and pressure transmitter is provided in the shell.
In the environment item of the environmental condition of the optical fiber methane sensing module and the optical signal launch and the signal processing apparatus of receiving
Part is the same or in the case of, and the microprocessor module receives the temperature and pressure transmitter of the optical fiber methane sensing module
The pressure and temperature information of transmission, for the compensation to being tested gas.
Embodiment 2：
The purpose of the present embodiment 2 is to provide a kind of optical fiber multiple spot photo-electric methane transducer, using above-mentioned optical fiber methane
Sensing module.
To achieve the goals above, the present invention is using a kind of following technical solution：
As shown in figure 5,
A kind of optical fiber multiple spot photo-electric methane transducer, including：(optical fiber methane senses several optical fiber methane sensing modules
1 optical fiber methane sensing module N of module), the signal processing apparatus of fiber beam splitting device and optical signal launch and receiving；
The optical signal launch connects fiber beam splitting device, the signal of the optical signal launch and receiving with the signal processing apparatus of receiving
The optical signal of processing unit transmitting is assigned to each optical-fibre channel and is transmitted to corresponding by the fiber beam splitting device
It is set to the optical fiber methane sensing module of different test points.
In the present embodiment, the fiber beam splitting device is using a 1XN fiber splitter, a CWDM optical splitter or more
A fiber coupler, as shown in Figure 3.The light splitting ratio of the fiber beam splitting device is evenly distributed between each channel；Or root
It is distributed in the light splitting ratio between each channel, channel according to the distance between test point adjustment where optical fiber methane sensing module
The optical signal light intensity distributed is directly proportional to the passage length.
It should be noted that the light splitting ratio of the fiber beam splitting device is typically to be evenly distributed between each channel,
For some special application requirements, the light splitting ratio of the fiber beam splitting device can according to specific test environment it is different into
Row adjustment.Generally, for used in the channel for the test point for needing measurement distance distant, due to the channel fiber length compared with
It is long, light energy be lost on the way in transmission it is bigger, therefore can be more larger to the light intensity of the distribution in the channel.
As shown in figure 4, the optical signal launch and the signal processing apparatus of receiving include microprocessor module, micro- place
Reason device module is separately connected light source module and light signal collection module, the microprocessor module, communication mould by communication module
Block, light source module are connected with power module respectively with light signal collection module；
The microprocessor module is for tuning light source die light signal in the block and handling the light signal collection
Mould measuring signal in the block；
The communication module is used to transmit in the control instruction and the light signal collection module of the microprocessor module
Measuring signal.
In the present embodiment, the light source module uses VCSEL lasers.The light signal collection module is visited using photoelectricity
Survey device.The optical signal launch and the device for receiving processing are made by a near-infrared vertical cavity surface emitting laser (VCSEL)
For its light source module, the optical signal that tuning signal is become tuning by tuning circuit by the VCSEL lasers is sent into the light
The incoming fiber optic of fine beam splitting arrangement；VCSEL lasers are tuned by driving circuit and are sent out tuned light beam, which is coupled to
1XN fiber optic splitters (numbers such as N can be 2,4,6 ...).Each channel in the optical-fibre channel of the roads N will be with an optical fiber interface
Connection, to which row is at the transmitting terminal of the roads N Measurement channel.
The light intensity of the tuning optical signal is assigned to each channel and is transferred to phase by the fiber beam splitting device
The corresponding methane sensing module.It will be by forming modulation light beam and passing through return light by the tested modulated laser of gas concentration
Fibre is transferred back into the signal processing apparatus.The modulation light beam being transmitted back in each channel is connect by a photodetector
It receives, and by the signal processing circuit processing in the microprocessor module, obtains the methane concentration test result in the channel.Institute
The schematic device for stating optical signal launch and receiving processing is as shown in Figure 4.
In VCSEL laser optical signals emit and receive processing unit, there be another optical fiber interface in each channel, can
To pick out optical fiber for connect optical fiber methane sensing module.Optical fiber in the optical fiber interface and a photodetector phase
Even.This photodetector of the optical signals passed back from optical fiber methane sensing module is converted into electronic signal, which passes through
Amplify, microprocessor module processing is sent to after A/D conversion process.
In optical fiber methane sensing module, there is an incoming fiber optic that the light beam of VCSEL is passed to optical fiber methane sensing module
In, another picks out optical fiber and will transfer back to signal processing apparatus by the tuned light beam of methane in optical fiber methane sensing module.
Due to can be connected by fiber port between optical fiber methane sensing module and signal processing apparatus, from
The distance of optical fiber methane sensing module to signal processing apparatus can be adjusted by adjusting the length of connecting line.It is general and
Speech, the shortest distance from optical fiber methane sensing module to signal processing apparatus is 1 meter of distance, and longest distance is 150 meters.
The position that optical fiber methane sensing module is placed can be designed according to practical application request.For example, in coal face
In detection can between coal work face frame, work face frame after, above head, tail corner, elevating conveyor, coal working face return air
Optical fiber methane sensing module is placed in crossheading, upper corner and all installation electrical equipment places of coal working face respectively；Or in pipe
It in corridor detection application, is moved towards as requested along piping lane, places an optical fiber methane sensing module at a certain distance.
The present embodiment can also be further improved, and temperature and pressure transmitter is arranged beside reference gas chamber.In the optical fiber
The environmental condition of methane sensing module as the environmental condition of the signal processing apparatus of receiving or connects with the optical signal launch
In the case of close, the microprocessor module receives the pressure and temperature information that the temperature and pressure transmitter is sent, for pair
The compensation of tested gas.
Embodiment 3：
The purpose of the present embodiment 3 is to provide a kind of optical fiber multiple spot photo-electric methane transducer system, is based on above-mentioned implementation
Example 1 and embodiment 2, using a kind of above-mentioned optical fiber multiple spot photo-electric methane transducer, as shown in Figure 5.
Beneficial effects of the present invention：
1, a kind of optical fiber methane sensing module of the present invention, optical fiber multiple spot photo-electric methane transducer and system, are adopted
With uncharged intrinsic safety methane transducer module, each module is allow to be placed on any region being potentially dangerous, example
Such as high electromagnetic radiation region, there is human body in inflammable and explosive region in the region etc. of potential hazard.
2, invention a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and the system uses
Passive optical-fiber network structure, each methane transducer module are connected by optical fiber, and each measurement point is allow flexibly to be arranged, and
According to the different arbitrary placements of the distance of measurement point.
3, invention a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and the system, in first
The series design that two or more gas chambers are used in the optical fiber methane sensing module of alkane sensor, not only reduces sensor
Volume, and absorption light path is also increased, be conducive to improve detection signal-to-noise ratio and measurement accuracy measurement sensitivity.
4, invention a kind of optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and the system uses
VCSEL lasers in the case where not increasing system power dissipation realize fine multiple spot photo-electric methane sensing measurement.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.Therefore, the present invention is not intended to be limited to this
These embodiments shown in text, and it is to fit to widest range consistent with the principles and novel features disclosed in this article.
Claims (10)
1. a kind of optical fiber methane sensing module, which is characterized in that including：
Shell with accommodation space is equipped with incoming fiber optic and picks out optical fiber inside the housing, the incoming fiber optic and picks out light
At least two gas sensing gas chamber being mutually parallel between fibre is connected between the gas sensing gas chamber by optical fiber, is believed according to light
It is single that the gentle room emergent light conversion of gas chamber incidence optical conversion element is respectively set before and after the gas sensing gas chamber in number transmission direction
Member；
The outgoing beam of optical fiber is become collimated light beam and injects the gas sensing gas chamber by the gas chamber incidence optical conversion element,
The outgoing beam of the gas sensing gas chamber is coupled into the connection gas sensing gas chamber by the gas chamber outgoing optical conversion element
Optical fiber or pick out optical fiber.
2. a kind of optical fiber methane sensing module according to claim 1, which is characterized in that the gas chamber incident light conversion is single
Member uses optical fiber parallel light lens.Or
The gas chamber outgoing optical conversion element uses fiber focus lens.
3. a kind of optical fiber methane sensing module according to claim 1, which is characterized in that the gas sensing gas chamber side
Several ventholes are set, metal screen is set on the venthole.
Scheme as a further preference, the shell include shell, and upper cover and lower cover is respectively set up and down in the shell, are formed
Structure with accommodation space, is arranged through-hole on the upper lid, the incoming fiber optic and picks out optical fiber via the through-hole, under described
The calibration mouth for being provided with through-hole is covered, powder metallurgy strainer is set above the calibration mouth, is set between the shell and lower cover
Set plug.
4. a kind of optical fiber methane sensing module according to claim 1, which is characterized in that setting can be set in the upper cover
The metal screen changed.
Or, being provided with the reference gas chamber of temperature and pressure transmitter in the shell.
5. a kind of optical fiber multiple spot photo-electric methane transducer is passed based on a kind of optical fiber methane of claim 1-4 any one of them
Feel module, which is characterized in that including：It several optical fiber methane sensing modules, fiber beam splitting device and optical signal launch and connects
The signal processing apparatus received；The optical signal launch connects fiber beam splitting device, the light letter with the signal processing apparatus of receiving
Number transmitting and receive signal processing apparatus transmitting optical signal by the fiber beam splitting device be assigned to each optical fiber lead to
Road is simultaneously transmitted to the corresponding optical fiber methane sensing module for being set to different test points.
6. a kind of optical fiber multiple spot photo-electric methane transducer according to claim 5, which is characterized in that the fiber beam splitting
Device uses a 1XN fiber splitter, a CWDM optical splitter or multiple fiber couplers.
Or, the light splitting ratio of the fiber beam splitting device is evenly distributed between each channel；
Or the light splitting between each channel is distributed according to the distance between test point adjustment where optical fiber methane sensing module
Ratio, the optical signal light intensity that channel is distributed are directly proportional to the passage length.
7. a kind of optical fiber multiple spot photo-electric methane transducer according to claim 5, which is characterized in that the optical signal hair
The signal processing apparatus penetrated and received includes microprocessor module, and the microprocessor module is separately connected light by communication module
Source module and light signal collection module, the microprocessor module, communication module, light source module and light signal collection module difference
It is connected with power module；
The microprocessor module is for tuning light source die light signal in the block and handling the light signal collection module
In measuring signal；
The communication module is for transmitting the control instruction of the microprocessor module and the light signal collection mould survey in the block
Measure signal.
8. a kind of optical fiber multiple spot photo-electric methane transducer according to claim 7, which is characterized in that in the optical fiber first
The environmental condition of alkane sensing module is as the environmental condition of the signal processing apparatus of receiving or close with the optical signal launch
In the case of, the microprocessor module receive the optical fiber methane sensing module temperature and pressure transmitter send pressure and
Temperature information, for the compensation to being tested gas.
9. a kind of optical fiber multiple spot photo-electric methane transducer according to claim 7, which is characterized in that the light source module
Using VCSEL lasers.
10. a kind of optical fiber multiple spot photo-electric methane transducer system, which is characterized in that described in claim any one of 5-9
A kind of optical fiber multiple spot photo-electric methane transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810167657.5A CN108375555B (en) | 2018-02-28 | 2018-02-28 | Optical fiber methane sensing module, optical fiber multi-point photoelectric methane sensor and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810167657.5A CN108375555B (en) | 2018-02-28 | 2018-02-28 | Optical fiber methane sensing module, optical fiber multi-point photoelectric methane sensor and system |
Publications (2)
| Publication Number | Publication Date |
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| CN108375555A true CN108375555A (en) | 2018-08-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459393A (en) * | 2018-12-25 | 2019-03-12 | 厦门蓝海之光科技有限公司 | Specific gas multiposition detection system |
| CN110118580A (en) * | 2019-05-24 | 2019-08-13 | 无锡佶达德光电子技术有限公司 | Laser detection system with environmental factor compensation |
| CN110568126A (en) * | 2019-09-11 | 2019-12-13 | 任启兰 | Methane sensor |
| CN110632008A (en) * | 2019-09-26 | 2019-12-31 | 山东微感光电子有限公司 | Multipoint reflection type photoelectric gas sensor probe and photoelectric gas detection device |
| CN114235018A (en) * | 2021-12-09 | 2022-03-25 | 山东微感光电子有限公司 | Temperature-adaptive FBG demodulation method and system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936886A (en) * | 2010-08-02 | 2011-01-05 | 西安石油大学 | Experiment device for optical fiber gas sensor |
| CN202216902U (en) * | 2011-08-05 | 2012-05-09 | 安徽中科瀚海光电技术发展有限公司 | Distributed laser methane monitoring system |
| CN102954949A (en) * | 2012-10-25 | 2013-03-06 | 安徽皖仪科技股份有限公司 | System with multi-channel networkings for simultaneous monitoring on coal mine gas concentration |
| CN102967580A (en) * | 2012-11-09 | 2013-03-13 | 山东微感光电子有限公司 | VCSEL (vertical cavity surface emitting laser)-based low-power-consumption gas detection method and device |
| CN103439289A (en) * | 2013-09-02 | 2013-12-11 | 刘永宁 | Multichannel and multi-point-location gas detection system based on second harmonic detection technique |
| CN104502278A (en) * | 2014-12-11 | 2015-04-08 | 北京航天易联科技发展有限公司 | Gas chamber of optic fiber gas sensor |
| CN105987885A (en) * | 2016-01-06 | 2016-10-05 | 山东省科学院激光研究所 | Fiber grating-based quasi-distributed gas sensing system |
| CN106290248A (en) * | 2016-10-08 | 2017-01-04 | 山东微感光电子有限公司 | Oil-gas mining and accumulating dangerous leakage gas optical fiber sensing system device |
-
2018
- 2018-02-28 CN CN201810167657.5A patent/CN108375555B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936886A (en) * | 2010-08-02 | 2011-01-05 | 西安石油大学 | Experiment device for optical fiber gas sensor |
| CN202216902U (en) * | 2011-08-05 | 2012-05-09 | 安徽中科瀚海光电技术发展有限公司 | Distributed laser methane monitoring system |
| CN102954949A (en) * | 2012-10-25 | 2013-03-06 | 安徽皖仪科技股份有限公司 | System with multi-channel networkings for simultaneous monitoring on coal mine gas concentration |
| CN102967580A (en) * | 2012-11-09 | 2013-03-13 | 山东微感光电子有限公司 | VCSEL (vertical cavity surface emitting laser)-based low-power-consumption gas detection method and device |
| CN103439289A (en) * | 2013-09-02 | 2013-12-11 | 刘永宁 | Multichannel and multi-point-location gas detection system based on second harmonic detection technique |
| CN104502278A (en) * | 2014-12-11 | 2015-04-08 | 北京航天易联科技发展有限公司 | Gas chamber of optic fiber gas sensor |
| CN105987885A (en) * | 2016-01-06 | 2016-10-05 | 山东省科学院激光研究所 | Fiber grating-based quasi-distributed gas sensing system |
| CN106290248A (en) * | 2016-10-08 | 2017-01-04 | 山东微感光电子有限公司 | Oil-gas mining and accumulating dangerous leakage gas optical fiber sensing system device |
Non-Patent Citations (4)
| Title |
|---|
| WANG SHUTAO 等: "Novel spectrum absorption optical fiber methane sensor", 《CHINESE JOURNAL OF MECHANICAL ENGINEERING》 * |
| 罗健斌 等: "利用光纤光栅传感器测量输电线路覆冰荷载试验", 《高电压技术》 * |
| 魏凯: "多通道光纤甲烷检测***的研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 魏玉宾: "光纤气体传感器及其安全工程应用中的关键技术研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459393A (en) * | 2018-12-25 | 2019-03-12 | 厦门蓝海之光科技有限公司 | Specific gas multiposition detection system |
| CN110118580A (en) * | 2019-05-24 | 2019-08-13 | 无锡佶达德光电子技术有限公司 | Laser detection system with environmental factor compensation |
| CN110568126A (en) * | 2019-09-11 | 2019-12-13 | 任启兰 | Methane sensor |
| CN110632008A (en) * | 2019-09-26 | 2019-12-31 | 山东微感光电子有限公司 | Multipoint reflection type photoelectric gas sensor probe and photoelectric gas detection device |
| CN110632008B (en) * | 2019-09-26 | 2022-12-06 | 山东微感光电子有限公司 | Multipoint reflection type photoelectric body sensor probe and photoelectric gas detection device |
| CN114235018A (en) * | 2021-12-09 | 2022-03-25 | 山东微感光电子有限公司 | Temperature-adaptive FBG demodulation method and system |
| CN114235018B (en) * | 2021-12-09 | 2023-08-08 | 山东微感光电子有限公司 | Temperature-adaptive FBG demodulation method and system |
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