CN207300816U - A kind of particulate matter sensors based on pulsed laser deposition - Google Patents
A kind of particulate matter sensors based on pulsed laser deposition Download PDFInfo
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- CN207300816U CN207300816U CN201721295508.4U CN201721295508U CN207300816U CN 207300816 U CN207300816 U CN 207300816U CN 201721295508 U CN201721295508 U CN 201721295508U CN 207300816 U CN207300816 U CN 207300816U
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- particulate matter
- detection
- light source
- sensors based
- laser
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Abstract
It the utility model is related to a kind of particulate matter sensors based on pulsed laser deposition, including housing, detection chambers, air inlet, gas outlet, fan, detection cavity, light-source chamber, absorption means, lens group, laser light source, photoelectric detector.The beneficial effects of the utility model are：The scattered signal that the design of sensor internal path channels makes particulate matter be measured when passing through detection chambers is strong, even if particle size very little, particulate matter is enough to monitor photodetector to the scattered signal of laser beam, improves the accuracy of measurement.Using the radiation pattern of pulse laser, the service life of sensor is extended.
Description
Technical field
It the utility model is related to environmental monitoring technology field, more particularly to a kind of particulate matter sensing based on pulsed laser deposition
Device.
Background technology
In today that air quality drastically deteriorates, haze has seriously affected the health of people, for particle quality testing
Survey technology research is very urgent.
Particulate matter detection mode mainly has gravimetric method, oscillating balance method, β ray methods and light scattering method at present.Gravimetric method
Shortcoming is non-on-line monitoring, and complicated；Oscillating balance method and β ray methods can realize that automatic on-line monitors, still
The data update cycle is most short when being 1 small, and shortcoming is non real-time nature and non-property on the spot, data be only capable of reaction sampling position at that time,
Local air quality, is not enough to represent real-time air quality at user present position.Light scattering method is according to small
Grain is detected particulate matter the scattering principle of light, its measurement is easy to operate, it can be achieved that the measurement of atmospheric environment real-time on-site.
Particulate matter sensors are mostly the sensors based on infrared LED light source on the market at present, since LED light source energy is weak,
The detection area of light source is big, and the signal gathered after particulate matter reflects is weaker, light of the optical signal in search coverage unit area
Energy density is relatively low, so that the response range of signal acquisition part causes measurement range small, is only applicable to being relatively large in diameter
Grain thing or high concentration monitoring, it is and relatively low for the less PM2.5 particulate matters sensitivity of particle diameter, and then cause accuracy in detection compared with
Difference.
Therefore, in view of the above, needing reasonably to improve the prior art.
Utility model content
For disadvantages described above, the utility model provides a kind of particulate matter sensors based on pulsed laser deposition, existing to solve
There are many deficiencies of technology.
To achieve the above object, the utility model uses following technical scheme：
A kind of particulate matter sensors based on pulsed laser deposition, including housing, detection chambers, air inlet, gas outlet, wind
Fan, detection cavity, light-source chamber, absorption means, lens group, laser light source, photoelectric detector, the housing be equipped with air inlet and
Gas outlet, sets fan on gas outlet；
Meanwhile the fan can be replaced air pump；
Detection cavity and two light-source chambers are set in the detection chambers, is set on detection cavity and is used to detect laser light scattering signal
Photoelectric detector, laser light source and the lens group focused on for laser are set in light-source chamber；
Signal detection direction is vertical with air stream transportation direction, the light source direction of the launch in the detection chambers at the same time, using double
Laser light source；
In laser light source direction, absorption means are designed with after chamber after testing；
The enterprising gas port of the housing, detection chambers, gas outlet form the gas channels of sensor；
Meanwhile the photoelectric detector connection PCB signal processing circuit, the laser light source connection PCB signal processing electricity
Road, PCB signal processing circuits set monitoring modular.
A kind of particulate matter sensors based on pulsed laser deposition described in the utility model have the beneficial effect that：In sensor
The scattered signal that the design of portion's path channels makes particulate matter be measured when passing through detection chambers is strong, even if particle size very little,
Grain thing is enough to monitor photodetector to the scattered signal of laser beam, improves the accuracy of measurement.Use pulse laser
Radiation pattern, extends the service life of sensor.
Brief description of the drawings
The utility model is described in further detail below according to attached drawing.
Fig. 1 is a kind of structural representation of the particulate matter sensors based on pulsed laser deposition described in the utility model embodiment
Figure；
In figure：
1st, housing；2nd, detection chambers；3rd, air inlet；4th, gas outlet；5th, fan；6th, detection cavity；7th, light-source chamber；8th, light absorbs
Device；9th, lens group；10th, laser light source；11st, photoelectric detector.
Embodiment
As shown in Figure 1, a kind of particulate matter sensors based on pulsed laser deposition described in the utility model embodiment, including
Housing 1, detection chambers 2, air inlet 3, gas outlet 4, fan 5, detection cavity 6, light-source chamber 7, absorption means 8, lens group 9, swash
Radiant 10, photoelectric detector 11, the housing 1 are equipped with air inlet 3 and gas outlet 4, set fan 5 to accelerate on gas outlet 4
Air flow, meanwhile, the fan can be replaced air pump, make sampled air quickly and stably by detection chambers 2；
Detection cavity 6 and two light-source chambers 7 are set in the detection chambers 2, is set on detection cavity 6 and is used to detect laser light scattering
The photoelectric detector 11 of signal, laser light source 10 and the lens group 9 focused on for laser are set in light-source chamber 7；
Signal detection direction is vertical with air stream transportation direction, the light source direction of the launch in the detection chambers 2 at the same time, using double
Laser light source, improves optical density, makes the scattered signal that particulate matter measures when passing through detection chambers strong, increase the accuracy of measurement；
In 10 direction of laser light source, absorption means 8 are designed with after chamber 2 after testing and are used to absorb remaining laser beam；
The enterprising gas port 3 of the housing 1, detection chambers 2, gas outlet 4 form the gas channels of sensor；
Meanwhile the 11 connection PCB signal processing circuit of photoelectric detector, at the 10 connection PCB signal of laser light source
Circuit is managed, PCB signal processing circuits set monitoring modular.Control laser light source 10 is set to launch pulse frequency in PCB circuit board
Control circuit, extend the service life of sensor.PCB signal processing circuits are connected with the photoelectric detector 11, after being used for
Continuous signal processing.PCB signal processing circuits specially monitor the monitoring modular of the rotation speed change of fan or air pump, with to final result
Carry out flow rate correction.There are signaling conversion circuit and voltage amplifier circuit on pcb board, signaling conversion circuit is used for the electricity of collection
Stream signal is converted to voltage signal, and voltage amplifier is used to amplify small voltage signal, for follow-up signal processing.
The above-mentioned description to embodiment is it will be appreciated that and using this for the ease of those skilled in the art
Case technology, person skilled in the art obviously easily can make these examples various modifications, and described herein one
As principle be applied in other embodiments without by performing creative labour.Therefore, this case is not limited to above example, ability
For the technical staff in domain according to the announcement of this case, the improvement made for this case and modification all should be in the protection domains of this case.
Claims (4)
1. a kind of particulate matter sensors based on pulsed laser deposition, including housing（1）, detection chambers（2）, air inlet（3）, outlet
Mouthful（4）, fan（5）, detection cavity（6）, light-source chamber（7）, absorption means（8）, lens group（9）, laser light source（10）, photoelectricity inspection
Survey device（11）, it is characterised in that：The housing（1）It is equipped with air inlet（3）And gas outlet（4）, gas outlet（4）Upper setting fan
（5）；
The detection chambers（2）Upper setting detection cavity（6）With two light-source chambers（7）, detection cavity（6）Upper set is used to detect laser
The photoelectric detector of scattered signal（11）, light-source chamber（7）Upper setting laser light source（10）With the lens group focused on for laser
（9）；
In laser light source（10）Direction, after testing chamber（2）After be designed with absorption means（8）；
The housing（1）Enterprising gas port（3）, detection chambers（2）, gas outlet（4）Form the gas channels of sensor.
A kind of 2. particulate matter sensors based on pulsed laser deposition according to claim 1, it is characterised in that：The fan
（5）It can be replaced air pump.
A kind of 3. particulate matter sensors based on pulsed laser deposition according to claim 1, it is characterised in that：The detection
Chamber（2）Interior signal detection direction is vertical with air stream transportation direction, the light source direction of the launch, using double laser light source.
A kind of 4. particulate matter sensors based on pulsed laser deposition according to claim 1, it is characterised in that：The photoelectricity
Detector（11）Connection PCB signal processing circuit, the laser light source（10）Connection PCB signal processing circuit, PCB signal processings
Circuit sets monitoring modular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721295508.4U CN207300816U (en) | 2017-10-10 | 2017-10-10 | A kind of particulate matter sensors based on pulsed laser deposition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721295508.4U CN207300816U (en) | 2017-10-10 | 2017-10-10 | A kind of particulate matter sensors based on pulsed laser deposition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207300816U true CN207300816U (en) | 2018-05-01 |
Family
ID=62414706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721295508.4U Expired - Fee Related CN207300816U (en) | 2017-10-10 | 2017-10-10 | A kind of particulate matter sensors based on pulsed laser deposition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207300816U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562524A (en) * | 2018-06-13 | 2018-09-21 | 北京博锐尚格节能技术股份有限公司 | Laser light scattering particle analyte detection device |
| CN113551194A (en) * | 2021-06-29 | 2021-10-26 | 江苏宏玉升电气工程有限公司 | Energy-saving environment-friendly multifunctional solar street lamp |
| CN114002115A (en) * | 2021-10-20 | 2022-02-01 | 江苏愈厚环保科技有限公司 | Self-heating regeneration type laser scattering method particulate matter sensor |
-
2017
- 2017-10-10 CN CN201721295508.4U patent/CN207300816U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108562524A (en) * | 2018-06-13 | 2018-09-21 | 北京博锐尚格节能技术股份有限公司 | Laser light scattering particle analyte detection device |
| CN113551194A (en) * | 2021-06-29 | 2021-10-26 | 江苏宏玉升电气工程有限公司 | Energy-saving environment-friendly multifunctional solar street lamp |
| CN114002115A (en) * | 2021-10-20 | 2022-02-01 | 江苏愈厚环保科技有限公司 | Self-heating regeneration type laser scattering method particulate matter sensor |
| CN114002115B (en) * | 2021-10-20 | 2022-06-14 | 江苏愈厚环保科技有限公司 | Self-heating regeneration type laser scattering method particulate matter sensor |
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Granted publication date: 20180501 Termination date: 20181010 |
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| CF01 | Termination of patent right due to non-payment of annual fee |