CN206725432U - A kind of non-spectral formula infrared gas sensor for how regional and more gasmetries - Google Patents
A kind of non-spectral formula infrared gas sensor for how regional and more gasmetries Download PDFInfo
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- CN206725432U CN206725432U CN201720575141.5U CN201720575141U CN206725432U CN 206725432 U CN206725432 U CN 206725432U CN 201720575141 U CN201720575141 U CN 201720575141U CN 206725432 U CN206725432 U CN 206725432U
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Abstract
The utility model discloses a kind of non-spectral formula infrared gas sensor for how regional and more gasmetries, including sensing probe, signal conditioning circuit and control circuit；Sensing probe includes detection air chamber, infrared light supply, concentration piece, M filter arrays, infrared detector array and rotating disk；Detection air chamber includes framework and the speculum installed in frame inner wall face, and the center of support is provided with pillar, and the top of pillar is connected with rotating disk；Signal conditioning circuit includes signal amplifier, the traffic filter being connected with signal amplifier output end and the power amplifier being connected with traffic filter output end, the input of signal amplifier and is connected with the output end of infrared detector；Control circuit includes the a/d converter being connected with power amplifier output, the signal isolator and single-chip microcomputer that are connected with a/d converter output end.The utility model small volume, low in energy consumption, performance is good, integrated height, can be used for measuring multiple regional and a variety of infrared-gas.
Description
Technical field
A kind of non-spectral formula infrared gas sensor for how regional and more gasmetries is the utility model is related to, is belonged to
Gas sensor technical field.
Background technology
Gas detection technology is more and more extensive in the application lived and produced, and is specifically focused on mine exploration, air
Pollution monitoring, chemical industry monitoring, wastewater treatment equipment etc..Mine exploration includes exploration to stone oil and gas, transport, storage
Deposit and refine, can all produce a large amount of inflammable and toxic gases, so gas detection is often applied in exploration drilling, production platform, coal
The occasions such as gas terminal；Nowadays air pollution is serious, and gas detection technology can timely and accurately monitor the sky of environment for human survival
Makings volume index, and the forecast of urban air pollution situation is provided；Chemical plant is one of maximum user of gas detection devices, at it
In production process, miscellaneous inflammability and poisonous gas can be produced, thus gas detection technology be often used in process island,
Laboratory etc.；Wastewater treatment equipment is typical in many cities and small towns, and methane and hydrogen sulfide, stink damp are contained in sewage
Body can be controlled by gas detection technology.Therefore, development of the people to gas sensor is increasingly paid attention to.
At present, gas sensor can be divided into semiconductor gas sensor, electrochemistry gas according to gas sensitive and action effect
Body sensor, solid-state electrolyte gas sensor, catalytic combustion method gas sensor, optical gas sensor etc..Semiconductor gas
Body sensor has that cost is cheap, be simple to manufacture, high sensitivity, fast response time, long lifespan, and circuit low to humidity sensitive are simple
The advantages that single, but it must work at high temperature, stability is poor, power is high；Electrochemical gas sensor, which is divided into, to be not required to power
Primary cell type and the controlled potential electrolysis formula powered of needs, many toxic gases and oxygen can be detected, major advantage is gas
The high sensitivity of body and good selectivity, weak point are that have short life (generally 2 years).Solid electrolyte gas passes
Sensor is a kind of gas sensor between semiconductor and electrochemistry, and its selectivity and sensitivity are all higher than semiconductor, and
And last a long time, therefore be applicable to many aspects, it the shortcomings that be in response to overlong time.Catalytic combustion type sensor belongs to
High-temperature gas sensors, advantage are that simple in construction, manufacturing cost is low, and sensor output is not influenceed by vapor, to ring
The humiture in border influence it is insensitive, its shortcoming be the life-span than relatively low, operating temperature is higher (internal up to 700 DEG C~800 DEG C),
It is larger that indicated value error is detected under anaerobic environment.Optical type gas sensor is mainly based on infrared absorption type, due to difference
Gas is different to infrared waves degree of absorption, be generally all by measuring infrared absorption wavelength come detection gas, at present because it
The general cost of structural relation is quite high.
However, conventional infrared absorption type gas sensor is during detection of gas, often can only be dense to pure gas
Degree is detected, and the measurement for multiple gases using the semiconductor of Fourier analyzer and multiple different wave lengths, it is necessary to be swashed
Light device, or the multiple wave filters of switching, can be completed, its detection system is not only complicated, and bulky.In addition,
Existing infrared absorption type gas sensor can not be accomplished to measure different places, and these sensors are difficult to integrate in addition
Change, cost are very high, lead to not perfect market.So market more needs technology maturation, cost is cheap, more practical
Gas sensor, in view of this, it is necessary to existing infrared gas sensor is improved to solve the above problems.
Utility model content
In view of the deficienciess of the prior art, the utility model purpose is to provide, a kind of small volume is low in energy consumption, performance is good, collection
The Cheng Huagao non-spectral formula infrared gas sensor for being used for how regional and more gasmetries, the sensor use the shape of rotating disk
Formula, control rotating disk switch filter arrays to detect more gas concentrations of different regions, by analyzing specific wavelength to reach
Under the change of infrared luminous intensity determine the concentration of gas with various, precision is high, temperature drift is small.
To achieve these goals, the utility model is to realize by the following technical solutions：
A kind of non-spectral formula infrared gas sensor for how regional and more gasmetries of the present utility model, including it is quick
Sense probe, signal conditioning circuit and control circuit；The sensing probe includes detection air chamber, installed in the red of detection air chamber one end
Outer light source, the concentration piece for being arranged on infrared light supply transmitting terminal, M filter arrays, infrared detector array and rotating disk, it is described
Detection air chamber is provided with air inlet and gas outlet, and the rotating disk is provided with multiple identifiers, built in each identifier not
With the resistance of resistance；Detection air chamber includes framework and the speculum installed in frame inner wall face, the filter arrays, infrared spy
Survey device array and rotating disk is successively set on the framework of infrared light supply exit end；The filter arrays include N number of optical filter
With the support for connecting optical filter, the infrared detector array includes N number of infrared detector；The center of the support is provided with
Pillar, the top of the pillar are connected with rotating disk；Signal conditioning circuit includes signal amplifier, exported with signal amplifier
Hold the traffic filter being connected and the power amplifier being connected with traffic filter output end, the signal amplifier it is defeated
Enter end with the output end of infrared detector to be connected；Control circuit includes the AD conversion being connected with power amplifier output
Device, the signal isolator and single-chip microcomputer being connected with a/d converter output end；The output end of rotating disk and signal isolator it is defeated
Go out end with the input of single-chip microcomputer to be connected, wherein, M, N are positive integer.
It should be noted that：Innovative point of the present utility model is the annexation between each part, single-chip microcomputer therein
The program being related in module is existing program, and here is omitted.
Above-mentioned filter arrays are specifically provided with three, and every filter arrays are specifically provided with four optical filters；And every institute
Filter arrays are stated using central point as crosspoint, the angle between adjacent two filter arrays is 60 °.
The equal length being spaced between the length of each optical filter and two neighboring optical filter.
Three optical filters in every filter arrays are detection optical filter, and another optical filter filters for contrast
Piece.
The M filter arrays are arranged on disk, and the one side of the disk face detection air chamber is reflecting surface.
Rotate the rotating disk, when the identifier upward arrow direction with framework registration mark symbol align when, Mei Gesuo
State one optical filter of infrared detector face.
For above-mentioned infrared light supply specifically using LED infrared light supplies, its wave-length coverage is 1~20 μm.
Above-mentioned concentration piece is specifically using optical glass LED collector lenses, for the infrared light for sending infrared light supply
Pool a branch of directional light.
Above-mentioned optical filter is specifically using bandpass filter；The infrared acquisition implement body is using rpyroelectric infrared
Sensor.
Above-mentioned a/d converter is using AD7195；The signal isolator is using ADuM5401 digital isolators；
The single-chip microcomputer is using STM32F407.
(1) the more ground region measurement infrared gas sensor that the utility model is related to, takes the form of array, and comparative analysis is more
The intensity difference of individual characteristic wavelength infrared light calculates the concentration of multiple gases, and integration degree is high.
(2) the more ground region measurement infrared gas sensor that the utility model is related to, the form of reflection is taken, increases light path,
So that the infrared light light intensity change of specific band becomes apparent.
(3) the more ground region measurement infrared gas sensor that the utility model is related to, the form of rotating disk is taken, it is only necessary to pass through
Rotating disk is controlled, to change filter arrays, so that it may measure more gas concentrations of different regions.
(4) the more ground region measurement infrared gas sensor that the utility model is related to, using the form of contrast, by score
Infrared luminous intensity of the infrared absorption peak light intensity of detection gas corresponding to contrast optical filter is analysed, makes testing result more accurate.
(5) the more ground region measurement infrared gas sensor that the utility model is related to, technique is simple, cost is low, in CMOS works
Skill is compatible, can integrate the detection, conditioning and process circuit of signal, coincidence senser miniaturization, array, intellectuality
Development trend.
Brief description of the drawings
Fig. 1 is sensor profile of the present utility model；
Fig. 2 is filter arrays figure of the present utility model；
Fig. 3 is rotating disk figure of the present utility model；
Fig. 4 is infrared detector array figure of the present utility model；
Fig. 5 is circuit test system structure chart of the present utility model；
Each label in figure：1. infrared light supply, 2. concentration pieces, 3. air inlets, 4. frameworks, 5. detection air chambers, 6. infrared acquisitions
Device, 7. infrared detector leads, 8. rotating disks, 9. speculums, 10. optical filters, 11. supports, 12 gas outlets, 13. rotating disks are drawn
Line, 14. identifiers, 15. registration marks symbol.
Embodiment
Technological means, creation characteristic, reached purpose and effect to realize the utility model are easy to understand, below
With reference to embodiment, the utility model is expanded on further.
Referring to Fig. 1 to Fig. 5, in the present embodiment, AC power that infrared gas sensor includes being sequentially connected, sensitive visit
Head, signal conditioning circuit and control circuit.
Sensing probe includes infrared light supply 1, concentration piece 2, air inlet 3, framework 4, detection air chamber 5, infrared detector 6, red
External detector lead 7, rotating disk 8, speculum 9, optical filter 10, support 11, gas outlet 12, rotating disk lead 13, identifier 14,
To standard identifier 15.
The groove ends of detection air chamber 5 and infrared light supply 1 are provided with air inlet 3, and the right-hand member of detection air chamber 5 is provided with gas outlet 12.
Infrared light supply 1 is arranged on the left end of detection air chamber 5, and the framework 4 of the exit end of infrared light supply 1 is cylindrical structure so that outgoing
It is directional light that light, which is tried one's best,.
Infrared light supply 1 passes to the infrared light to external radiation wave-length coverage at 1~20 μm after electric current, is converged after concentration piece 2
A branch of directional light is polymerized to, then multiple reflections reach filter arrays in air chamber 5 is detected.
Wherein, infrared light supply 1 is LED infrared light supplies, after the light source passes to electric current.To external radiation wide range infrared light, its ripple
Long scope meets needs of the instrument to infrared light wave-length coverage at 1~20 μm.
Wherein, concentration piece 2 is optical glass LED collector lenses, the divergence expression that the lens send LED infrared light supplies it is red
Outer light pools a branch of directional light.
Wherein, it is rectangular parallelepiped structure to detect air chamber 5, and air chamber internal face is all provided with speculum 9, by infrared light supply 1 send through
The directional light that concentration piece 2 converges reaches optical filter 10 after multiple reflections back and forth in detection air chamber 5.
Wherein, optical filter 10 is arranged on a disk using the form of array, is divided into three optical filters by optical filter 10
Array, four optical filters 10, and the equal length being spaced between the length of each optical filter 10 and optical filter 10 are provided with per strip array,
So that reaching exactly to next optical filter 10 after reflexing to reflecting again on optical filter 10, each spacer support 11 connects
Then, per strip array using its central point as crosspoint, the angle per strip array is 60 °.
Wherein, three optical filters 10 are detection optical filter in every filter arrays, and another is contrast optical filter, that is, is visited
Surveying optical filter can be by an infrared absorption peak of corresponding three kinds of gas, and contrasting optical filter can be by the red of wave band
Outer light, this infrared light are not absorbed by gas.
Wherein, other positions of disk where three filter arrays are metal material, the one side of this material face air chamber
For reflecting surface.
Wherein, optical filter 10 is bandpass filter, and the optical filter 10 is through a kind of infrared light of required Detection wavelength, reflection
The infrared light of its all band.
Wherein, the disc centre of filter arrays arrangement is connected to a pillar, and pillar upper end is connected to rotating disk 8, uses
To rotate control filter arrays.
Wherein, four detectors are fixed on air chamber upper frame 4, each by infrared detector 6 using the form of array
One optical filter 10 of detector face.
Wherein, infrared detector 6 is pyroelectricity.
Wherein, the infrared light that infrared light supply 1 is sent is emitted to infrared acquisition through after detecting air chamber 5 after optical filter 10
In device 6, and the transmitted spectrum of different characteristic is formed according to the composition and concentration of the gas indoor gas passed through, absorbed on transmitted spectrum
The change of peak intensity then embodies the concentration of gas, then current signal is converted into data signal, basis signal with a/d converter
The size of change calculates the concentration of gas.
Wherein, a/d converter uses AD7195.
Wherein, signal isolator uses ADuM5401 digital isolators.
Wherein, single-chip microcomputer uses STM32F407.
Signal conditioning circuit includes signal amplifier, traffic filter and power amplifier.
Control circuit includes a/d converter, signal isolator, single-chip microcomputer, LDO linear power supplies and USB interface.
Infrared detector lead connects signal amplifier, the input of the output end connection single-chip microcomputer of signal isolator, rotation
Rotating disk lead 13 connects single-chip microcomputer.
The specific course of work of the present embodiment is as follows：
Switch on power and rotate the rotating disk 8 of device to the region of " chemical plant " title, make " chemical plant " name identifiers
14 align with to standard identifier 15, then corresponding filter arrays are from left to right followed successively by SO2Narrow-band pass filter, CO it is narrow
Bandpass filter, NO narrow-band pass filter, contrast optical filter, SO28.7 μm of an absorption is have chosen in infrared band
Peak, CO have chosen 4.65 μm of an absworption peak in infrared band, and NO have chosen 5.3 μm of an absorption in infrared band
Peak, contrast optical filter have chosen the infrared light that wavelength is 18 μm in infrared band.Device is positioned over concentration known again
SO2, in CO, NO gas, pass through air inlet/outlet 12 so that after being full of under test gas in detection air chamber 5, what infrared light supply 1 was sent
Infrared light absorbs by the gas being detected in the detection reflection process of air chamber 5 in air chamber 5 so that and light intensity changes, and in gas
The absworption peak wave band light intensity change of body is particularly evident, and after optical filter 10, the infrared light of specific wavelength reaches infrared detector 6
On, the infra-red radiation for detecting and receiving is transformed into faint current signal by detector element, through the field in probe
Outwards exported after the amplification of effect pipe, signal condition is carried out by modulate circuit, and current signal is converted to by a/d converter
Data signal, corresponding data signal is recorded, reach infrared spy by contrasting 18 μm of infrared luminous intensity of optical filter in addition
Survey on device 6, the infra-red radiation for detecting and receiving is transformed into faint current signal by detector element, through in probe
FET amplification after outwards export, by modulate circuit carry out signal condition, and by current signal pass through a/d converter turn
Data signal is changed to, records corresponding data signal.SO under various concentrations known to big measurement again2, CO, NO gas, will
The data signal that the data signal that detection optical filter obtains obtains with contrast optical filter contrasts, so as to obtain digital signal change
Size, the size according to digital signal change are obtained on SO2, intend between CO, NO gas concentration and digital signal change size
Close curved line relation.Similarly, rotating disk 8 is rotated to the region of " waste plant " and " mine " title, it is demarcated.
When carrying out a certain chemical plant unknown gas concentration detection, switch on power and rotate the rotating disk 8 of device to " chemical industry
The region of factory " title, " chemical plant " name identifiers 14 are made to be alignd with to standard identifier 15, then the lead in rotating disk 8 is connected
Single-chip microcomputer, single-chip microcomputer are adjusted to " chemical plant " detection mode.Pass through air inlet 3 and gas outlet 12 so that filled in detection air chamber 5
Full under test gas, then infrared light supply 1 is connected, continuous hair of the infrared light that infrared light supply 1 is sent through the convergence of concentration piece 2 by air chamber
After penetrating the absorption with gas, infrared detector array is emitted to by filter arrays, is received by infrared detector 6 from optical filter
It is changed into faint current signal after 10 infrared light detectings come in, to outer defeated after the FET amplification in probe
Go out, signal condition is carried out by modulate circuit, and current signal is converted into data signal by a/d converter, then according to number
The size of word signal intensity detects SO in air chamber 5 to calculate2, CO, NO gas concentration.
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (10)
1. a kind of non-spectral formula infrared gas sensor for how regional and more gasmetries, it is characterised in that including sensitivity
Probe, signal conditioning circuit and control circuit；
The sensing probe include detection air chamber (5), installed in detection air chamber (5) one end infrared light supply (1), be arranged on it is infrared
The concentration piece (2), M filter arrays, infrared detector array and rotating disk (8) of light source (1) transmitting terminal, the detection air chamber
(5) air inlet (3) and gas outlet (12) are provided with, the rotating disk (8) is provided with multiple identifiers (14), each mark
Accord with the resistance of different resistances built in (14)；
The detection air chamber (5) includes framework (4) and the speculum (9) installed in framework (4) internal face, the optical filter battle array
Row, infrared detector array and rotating disk (8) are successively set on the framework (4) of infrared light supply (1) exit end；The optical filter
Array includes N number of optical filter (10) and the support (11) for connecting optical filter (10), and the infrared detector array includes N number of
Infrared detector (6)；The center of the support (11) is provided with pillar, and the top of the pillar is connected with rotating disk (8)；
The signal conditioning circuit include signal amplifier, the traffic filter that is connected with signal amplifier output end and with letter
The power amplifier that number filter output is connected, the input of the signal amplifier and the output of infrared detector (6)
End is connected；
A/d converter that the control circuit includes being connected with power amplifier output, it is connected with a/d converter output end
Signal isolator and single-chip microcomputer；
The output end of the rotating disk (8) and the output end of signal isolator are connected with the input of single-chip microcomputer, wherein, M,
N is positive integer.
2. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is that the filter arrays are specifically provided with three, and every filter arrays are specifically provided with four optical filters (10)；And every
For the filter arrays using central point as crosspoint, the angle between adjacent two filter arrays is 60 °.
3. the non-spectral formula infrared gas sensor according to claim 2 for how regional and more gasmetries, it is special
Sign is, the equal length being spaced between the length and two neighboring optical filter (10) of each optical filter (10).
4. the non-spectral formula infrared gas sensor according to claim 2 for how regional and more gasmetries, it is special
Sign is that three optical filters (10) in every filter arrays are detection optical filter, and another optical filter (10) is pair
Compare optical filter.
5. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is that the M filter arrays are arranged on disk, and the one side of the disk face detection air chamber (5) is reflecting surface.
6. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is, each described one optical filter (10) of infrared detector (6) face.
7. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is that for the infrared light supply (1) specifically using LED infrared light supplies, its wave-length coverage is 1~20 μm.
8. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is that the concentration piece (2) is specifically using optical glass LED collector lenses.
9. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is that the optical filter (10) is specifically using bandpass filter；The infrared detector (6) is specifically released using heat
Electric infrared sensor.
10. the non-spectral formula infrared gas sensor according to claim 1 for how regional and more gasmetries, it is special
Sign is that the a/d converter is using AD7195；The signal isolator is using ADuM5401 digital isolators；Institute
Single-chip microcomputer is stated using STM32F407.
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| CN201720575141.5U CN206725432U (en) | 2017-05-23 | 2017-05-23 | A kind of non-spectral formula infrared gas sensor for how regional and more gasmetries |
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| CN201720575141.5U CN206725432U (en) | 2017-05-23 | 2017-05-23 | A kind of non-spectral formula infrared gas sensor for how regional and more gasmetries |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990065A (en) * | 2017-05-23 | 2017-07-28 | 南京信息工程大学 | A kind of non-spectral formula infrared gas sensor for how regional and many gasmetries |
| CN109459403A (en) * | 2018-12-12 | 2019-03-12 | 镇江中煤电子有限公司 | The more gas-detecting devices of underground coal mine and detection method |
| CN109781651A (en) * | 2019-03-04 | 2019-05-21 | 宁波舜宇红外技术有限公司 | A kind of gas detection cell and infrared gas alarm |
| CN110687066A (en) * | 2019-09-17 | 2020-01-14 | 中国科学院上海微系统与信息技术研究所 | Infrared gas sensor |
| CN111982850A (en) * | 2020-08-20 | 2020-11-24 | 成都安可信电子股份有限公司 | Detection device and method for infrared anti-acetic acid interference of sensor array |
| CN112461815A (en) * | 2019-09-09 | 2021-03-09 | 昆山卓丰电子科技有限公司 | Non-dispersive infrared turbidity detection device |
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2017
- 2017-05-23 CN CN201720575141.5U patent/CN206725432U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106990065A (en) * | 2017-05-23 | 2017-07-28 | 南京信息工程大学 | A kind of non-spectral formula infrared gas sensor for how regional and many gasmetries |
| CN106990065B (en) * | 2017-05-23 | 2023-09-12 | 南京信息工程大学 | Non-spectroscopic infrared gas sensor for multi-region and multi-gas measurement |
| CN109459403A (en) * | 2018-12-12 | 2019-03-12 | 镇江中煤电子有限公司 | The more gas-detecting devices of underground coal mine and detection method |
| CN109781651A (en) * | 2019-03-04 | 2019-05-21 | 宁波舜宇红外技术有限公司 | A kind of gas detection cell and infrared gas alarm |
| CN112461815A (en) * | 2019-09-09 | 2021-03-09 | 昆山卓丰电子科技有限公司 | Non-dispersive infrared turbidity detection device |
| CN110687066A (en) * | 2019-09-17 | 2020-01-14 | 中国科学院上海微系统与信息技术研究所 | Infrared gas sensor |
| CN111982850A (en) * | 2020-08-20 | 2020-11-24 | 成都安可信电子股份有限公司 | Detection device and method for infrared anti-acetic acid interference of sensor array |
| CN111982850B (en) * | 2020-08-20 | 2023-11-21 | 成都安可信电子股份有限公司 | Detection device and method for infrared anti-acetic acid interference by sensor array |
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Granted publication date: 20171208 Termination date: 20190523 |