CN107991210A - Sensor - Google Patents
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- Publication number
- CN107991210A CN107991210A CN201711195293.3A CN201711195293A CN107991210A CN 107991210 A CN107991210 A CN 107991210A CN 201711195293 A CN201711195293 A CN 201711195293A CN 107991210 A CN107991210 A CN 107991210A
- Authority
- CN
- China
- Prior art keywords
- sensor
- gas
- air
- laser
- fan blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004458 analytical method Methods 0.000 claims abstract description 21
- 239000004065 semiconductor Substances 0.000 claims abstract description 10
- 230000003595 spectral effect Effects 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 7
- 239000013618 particulate matter Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000000809 air pollutant Substances 0.000 claims description 3
- 231100001243 air pollutant Toxicity 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000012800 visualization Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 238000001285 laser absorption spectroscopy Methods 0.000 claims 1
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000000862 absorption spectrum Methods 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 210000000621 bronchi Anatomy 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 206010006451 bronchitis Diseases 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G01N15/075—
Abstract
The present invention provides a kind of sensor.The sensor includes housing, motor, fan blade and analytical equipment, and the motor and fan blade are contained in the housing；The motor converts electrical energy into mechanical energy and obtains object gas to be detected to drive the fan blade to rotate air is sent into the analytical equipment after powered up；The analytical equipment obtains air quality index based on the tunable diode laser absorption spectroscopy technical Analysis object gas.The sensor utilizes semiconductor laser with tunable wavelength tuning characteristic based on tunable diode laser absorption spectroscopy technology, make its inswept tested gas absorption spectrum line to the air progress fast modulation laser frequency being blown from into determines frequency range, and detect be actually taken up by gas after the harmonic component that transmits in spectral line analyze the absorbing state of gas, so as to draw current air mass index.In this way, the sensor allow user can become apparent from suction air quality condition.
Description
Technical field
The present invention relates to a kind of sensor, more particularly to a kind of biography based on tunable diode laser absorption spectroscopy technology
Sensor.
Background technology
PM2.5 refers to particulate matter of the diameter less than or equal to 2.5 microns in air, also referred to as lung particulate matter.These
Particulate matter can enter bronchus after being inhaled into human body, disturb the gas exchanges of lung, and initiation includes asthma, bronchitis and painstaking effort
The disease of pipe disease etc..These particles can also enter blood by bronchus and alveolar, pernicious gas therein, heavy metal
Deng dissolving in blood, the injury bigger to health.
As it can be seen that the particulate matter in air has a major impact air quality, and a large amount of harmful materials are in air
Middle stop, carrys out very big influence, wherein haze is exactly most obvious embodiment to the health care belt of human body.So make user real-time
The demand of solution air quality seems and is especially necessary.
The content of the invention
In view of this, the present invention proposes a kind of sensor that can detect air quality.
A kind of sensor includes housing, motor, fan blade and analytical equipment, and the motor and fan blade are contained in the housing；
The motor converts electrical energy into mechanical energy to drive the fan blade to rotate so that air is sent into the analytical equipment after powered up
To obtain object gas to be detected；The analytical equipment is based on the tunable diode laser absorption spectroscopy technical Analysis mesh
Standard gas body obtains air quality index.
In one embodiment, the analytical equipment includes laser generator, gas absorption vessel, laser absorption device,
Photoelectric detector and analysis element；It is to be detected to obtain that the fan blade can blow air into the gas absorption vessel after rotating
Object gas；The laser of the laser generator transmitting is received after the gas absorption vessel by the laser absorption device,
The gas of the gas absorption vessel determines frequency range by absorption laser generator transmitting laser line；The photoelectric detector
The optical signal that the laser absorption device receives is converted into electric signal；The analysis element is measured by gas using techniques of phase-sensitive detecting technique
Body transmits the harmonic component in spectral line after absorbing and obtains the air quality index in air to analyze the absorbing state of gas.
In one embodiment, the photoelectric detector is by the real-time control and data processing using microcontroller as core
Controller and the semiconductor laser power supply composition that system is formed.
In one embodiment, the laser generator is semiconductor laser with tunable.
In one embodiment, the gas absorption vessel is equipped with the air inlet that gas absorption vessel is sent into for air
Hole.
In one embodiment, the venthole being correspondingly arranged with air admission hole is additionally provided with the gas absorption vessel, can
The passage of air flow is formed in the sensor so that the air quality index detection that the sensor is stated in realization
It can also achieve the purpose that to take a breath in real time at the same time.
In one embodiment, the gas absorption vessel is that one be located at beside the fan blade is semi-enclosed rectangular
Shape passage.
In one embodiment, the sensor further includes display element, and the analysis element is by the result after analysis
Send and extremely shown to the display element and by the display element.
In one embodiment, the result after analysis is transmitted to visualization device and is set by visualizing by the analysis element
Standby display.
In one embodiment, the sensor is equipped with filter screen in air delivery end, and the filter screen is by air
Pollution particulate matter filter out come effective eliminating particle air pollutants.
In conclusion the sensor is swashed based on tunable diode laser absorption spectroscopy technology using tunable semiconductor
Light device wavelength tuning characteristic, carrying out fast modulation laser frequency to the air being blown from into makes its inswept tested gas absorption spectrum
Line determines frequency range, and detect be actually taken up by gas after transmit the harmonic component in spectral line to analyze the absorbing state of gas, from
And draw current air mass index.In this way, the sensor allow user can become apparent from suction air quality condition, with certainly
Practical action before settled, meets the demand of hommization.
Brief description of the drawings
Fig. 1 is the fundamental diagram of the sensor of one embodiment of the present invention.
Fig. 2 is a kind of stereogram of embodiment of sensor shown in Fig. 1.
Fig. 3 is the front view of sensor shown in Fig. 2.
Fig. 4 is the top view of sensor shown in Fig. 2.
Fig. 5 is the side view of sensor shown in Fig. 2.
Embodiment
Before describing the embodiments in more detail, it should be understood that the invention is not restricted to institute hereafter or in attached drawing in the application
The detailed construction or arrangement of elements of description.The present invention can be the embodiment that other manner is realized.Furthermore, it is to be understood that this paper institutes
The wording and term used is solely for description purposes, should not the explanation of being construed as limiting property." comprising " used herein, "comprising",
The similar wording such as " having " is meant comprising items listed thereafter, its equivalent and other additional things.Particularly, description is worked as
When " certain element ", the quantity that the present invention does not limit the element can also include multiple as one.
As shown in Figure 1, the present invention provides a kind of sensor 99.Sensor 99 is to be based on tunable semiconductor laser absorption light
Spectrum (TDLAS, Tunable Diode Laser Absorption Spectroscopy) technology and the ventilation researched and developed are with being detected as
Integrated sensor.TDLAS technologies are to utilize semiconductor laser with tunable wavelength tuning characteristic, obtain the spy of object gas
The absorption spectrum in absorption spectrum ranges is levied, so as to carry out qualitative or quantitative analysis to object gas.Sensor 99 can pass through
Uninterrupted air-supply and real time laser technology for detection air quality and real-time delivery air quality index.It is tunable in sensor 99
Laser method, which is modulated light, to produce interference to selected absorption line to avoid other gas componants, so as to reduce by sky
The possibility of the influence of the environmental factors such as the dust in gas, humidity and temperature so that 99 performance of sensor is more stable.
Please refer to Fig. 2-5, sensor 99 includes housing 10, motor 20, fan blade 30 and analytical equipment 40.Housing 10 is big
Cause rectangular.Motor 20 and fan blade 30 are arranged at the lower part of housing 10, and relatively, analytical equipment 40 is arranged at the upper of housing 10
Portion.Housing 10 is equipped with the receiving space 12 for housing motor 20 and fan blade 30.Analytical equipment 40 includes laser generator 42, gas
Absorb container 43, laser absorption device 44, photoelectric detector 46, analysis element 48 and display element 49.
Motor 20 converts electrical energy into mechanical energy after powered up, it is used to drive fan blade 30 to rotate.Fan blade 30 can after rotating
Gas absorption vessel 43 is blowed air into obtain object gas to be detected.Gas absorption vessel 43 is to be located at the side of fan blade 30
A semi-enclosed oblong channel, which is provided with for air be sent into gas absorption vessel 43 square air admission hole 432.Can be with
Understand ground, gas absorption vessel 43 is additionally provided with the venthole (not indicating) being correspondingly arranged with air admission hole 432.
Analytical equipment 40 obtains air based on the tunable diode laser absorption spectroscopy technical Analysis object gas
Performance figure.Laser generator 42 and laser absorption device 44 are respectively arranged at the opposite end of gas absorption vessel 43.Laser is sent out
Raw device 42 and laser absorption device 44 are correspondingly arranged, and in the present embodiment, laser generator 42 is semiconductor laser with tunable,
Its laser launched is received after gas absorption vessel 43 by laser absorption device 44.Laser generator 42 can fast modulation laser
Frequency simultaneously exports laser to scan the absorption line of measured target gas, and sensor 99 obtains target gas by detecting absorption spectrum
Body mass index.The gas of gas absorption vessel 43 determines frequency range by absorb that laser generator 42 launches laser line.
Photoelectric detector 46 be the controller that is made of the real-time control using microcontroller as core with data handling system and
Semiconductor laser power supply forms, it is used to the optical signal that laser absorption device 44 receives being converted to electric signal.
Analysis element 48 transmits the harmonic component in spectral line to analyze after being actually taken up by gas using techniques of phase-sensitive detecting technique measurement
The absorbing state of gas, obtains the air quality index in present air in real time.In the present embodiment, air quality index
For PM2.5 values.Result after analysis is sent to display element 49 and by display element 49 and shown by analysis element 48, allows user
The quality condition of suction air can be become apparent from, to determine current practical action, meets the demand of hommization.It is real-time at other
In mode, analysis element 48 can also synchronously by the fructufy after analysis when be transmitted on visualization device such as mobile phone by visualizing
Equipment is shown, for user's Real Time Observation.
In the present embodiment, sensor 99 can also add various types of filter screens 50, filtering in air delivery end
Net 50, which filters out the pollution particulate matter in air, carrys out effective eliminating particle air pollutants.In this way, via gas absorption vessel
43 venthole discharges purified gas so that the air quality of user's incoming call reaches required standard.Therefore, it is of the invention
The sensor 99 of offer is particularly suitable for stopping extra-high dust, bad environments industrial environment application, as the various burners of steel,
Aluminum and non-ferrous metal, chemical industry, petrochemical industry, cement, power generation and waste incineration etc..
In conclusion sensor 99 provided by the invention can solve asking for air quality difference by the setting of filter screen 50
Topic.Tunable laser method in sensor 99 is modulated light can be to avoid other gas componants to selected absorption line
Interference is produced, from dust and the influence of air pollution, performance comparison problem.Gas absorption vessel 43 is provided with air admission hole 432
And venthole, can be in the interior passage for forming air flow of sensor 99 so that the air that the sensor 99 is stated in realization
While performance figure detects, moreover it is possible to achieve the purpose that to take a breath in real time.In this way, sensor 99 can pass through improvement of uninterruptedly taking a breath
Air quality, makes user absorb new air to mitigate harm of harmful material to human body.
Concepts described herein may be embodied to other forms in the case of without departing from its spirit and characteristic.It is disclosed
Specific embodiment should be considered as illustrative rather than restricted.Therefore, the scope of the present invention be by appended claim,
Rather than it is determined according to these descriptions before.Any change in the letter of claim and equivalency range is all
The scope of these claims should be belonged to.
Claims (10)
1. a kind of sensor, it includes housing, it is characterised in that：The sensor further includes motor, fan blade and analytical equipment, institute
State motor and fan blade is contained in the housing；The motor converts electrical energy into mechanical energy to drive the fan blade to turn after powered up
It is dynamic to obtain object gas to be detected so that air is sent into the analytical equipment；The analytical equipment is based on described tunable half
Conductor Laser absorption spectroscopy techniques analyze object gas to obtain air quality index.
2. sensor as claimed in claim 1, it is characterised in that：The analytical equipment includes laser generator, and gas absorbs
Container, laser absorption device, photoelectric detector and analysis element；The fan blade can blow air into the gas and absorb after rotating holds
Device is to obtain object gas to be detected；The laser of the laser generator transmitting is described after the gas absorption vessel
Laser absorption device receives, and absorption laser generator transmitting laser line is determined frequency model by the gas of the gas absorption vessel
Enclose；The optical signal that the laser absorption device receives is converted to electric signal by the photoelectric detector；The analysis element uses phase
Quick detection technique measurement transmits the harmonic component in spectral line after being actually taken up by gas and obtains air to analyze the absorbing state of gas
In air quality index.
3. sensor as claimed in claim 2, it is characterised in that：The photoelectric detector is by the reality using microcontroller as core
When control with data handling system form controller and semiconductor laser power supply form.
4. sensor as claimed in claim 2, it is characterised in that：The laser generator is semiconductor laser with tunable.
5. sensor as claimed in claim 2, it is characterised in that：The gas absorption vessel is equipped with is sent into gas for air
Absorb the air admission hole of container.
6. sensor as claimed in claim 5, it is characterised in that：It is additionally provided with the gas absorption vessel corresponding with air admission hole
The venthole of setting, can form the passage of air flow so that the sky that the sensor is stated in realization in the sensor
Makings volume index can also achieve the purpose that to take a breath in real time while detection.
7. sensor as claimed in claim 6, it is characterised in that：The gas absorption vessel is to be located at beside the fan blade
One semi-enclosed oblong channel.
8. sensor as claimed in claim 2, it is characterised in that：The sensor further includes display element, the analysis elements
Result after analysis is sent to the display element and by the display element and shown by part.
9. sensor as claimed in claim 2, it is characterised in that：Result after analysis is transmitted to visually by the analysis element
Change equipment to be shown by visualization device.
10. sensor as claimed in claim 1, it is characterised in that：The sensor is equipped with filter screen, institute in air delivery end
State filter screen and filter out the pollution particulate matter in air and carry out effective eliminating particle air pollutants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711195293.3A CN107991210A (en) | 2017-11-24 | 2017-11-24 | Sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711195293.3A CN107991210A (en) | 2017-11-24 | 2017-11-24 | Sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107991210A true CN107991210A (en) | 2018-05-04 |
Family
ID=62031976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711195293.3A Pending CN107991210A (en) | 2017-11-24 | 2017-11-24 | Sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107991210A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318427A (en) * | 2018-05-09 | 2018-07-24 | 杭州纳清光电科技有限公司 | Surrounding air detection device |
| CN108663404A (en) * | 2018-06-13 | 2018-10-16 | 佛山市澄澜点寸科技有限公司 | A kind of combustible gas sensor |
| CN108717053A (en) * | 2018-06-13 | 2018-10-30 | 佛山市澄澜点寸科技有限公司 | A kind of hydrogen gas sensor |
| CN115754170A (en) * | 2022-12-06 | 2023-03-07 | 山东科泰环境监测有限公司 | Atmospheric environment quality real-time monitoring device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001526785A (en) * | 1997-05-23 | 2001-12-18 | レーザーテック インターナショナル | A device for measuring changes in optical properties of circulating liquid or gaseous media |
| CN104297207A (en) * | 2014-10-22 | 2015-01-21 | 深圳市唯锐科技有限公司 | TDLAS based laser expiration analyzer and system |
| CN204613066U (en) * | 2015-05-29 | 2015-09-02 | 济南诺方电子技术有限公司 | A kind of dust detecting sensor based on LASER Light Source |
| CN105043951A (en) * | 2015-05-22 | 2015-11-11 | 重庆风小六智能技术有限公司 | Laser dust sensor |
| CN206362670U (en) * | 2016-12-12 | 2017-07-28 | 可天士半导体（沈阳）有限公司 | A kind of laser dust sensor |
| CN206638557U (en) * | 2017-04-13 | 2017-11-14 | 南京美尔特电子科技有限公司 | A kind of PM2.5 detectors |
-
2017
- 2017-11-24 CN CN201711195293.3A patent/CN107991210A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001526785A (en) * | 1997-05-23 | 2001-12-18 | レーザーテック インターナショナル | A device for measuring changes in optical properties of circulating liquid or gaseous media |
| CN104297207A (en) * | 2014-10-22 | 2015-01-21 | 深圳市唯锐科技有限公司 | TDLAS based laser expiration analyzer and system |
| CN105043951A (en) * | 2015-05-22 | 2015-11-11 | 重庆风小六智能技术有限公司 | Laser dust sensor |
| CN204613066U (en) * | 2015-05-29 | 2015-09-02 | 济南诺方电子技术有限公司 | A kind of dust detecting sensor based on LASER Light Source |
| CN206362670U (en) * | 2016-12-12 | 2017-07-28 | 可天士半导体（沈阳）有限公司 | A kind of laser dust sensor |
| CN206638557U (en) * | 2017-04-13 | 2017-11-14 | 南京美尔特电子科技有限公司 | A kind of PM2.5 detectors |
Non-Patent Citations (1)
| Title |
|---|
| 庞涛等: "基于TDLAS技术的全量程激光甲烷传感器", 《光子学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318427A (en) * | 2018-05-09 | 2018-07-24 | 杭州纳清光电科技有限公司 | Surrounding air detection device |
| CN108663404A (en) * | 2018-06-13 | 2018-10-16 | 佛山市澄澜点寸科技有限公司 | A kind of combustible gas sensor |
| CN108717053A (en) * | 2018-06-13 | 2018-10-30 | 佛山市澄澜点寸科技有限公司 | A kind of hydrogen gas sensor |
| CN115754170A (en) * | 2022-12-06 | 2023-03-07 | 山东科泰环境监测有限公司 | Atmospheric environment quality real-time monitoring device |
| CN115754170B (en) * | 2022-12-06 | 2023-08-22 | 山东科泰环境监测有限公司 | Atmospheric environment quality real-time monitoring device |
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Application publication date: 20180504 |