CN205506632U - Portable particulate matter detection appearance - Google Patents
Portable particulate matter detection appearance Download PDFInfo
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- CN205506632U CN205506632U CN201620340218.6U CN201620340218U CN205506632U CN 205506632 U CN205506632 U CN 205506632U CN 201620340218 U CN201620340218 U CN 201620340218U CN 205506632 U CN205506632 U CN 205506632U
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- particulate matter
- air
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- emitting window
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Abstract
The utility model discloses a portable particulate matter detection appearance, including shell, laser instrument, image acquisition unit, the shell is opened has air intake, air outlet and light -emitting window, is in at least one of them port department of air intake and air outlet is provided with the air pump, light -emitting window department seals there is convergent lens, be provided with the speculum on the inner wall of shell, the laser instrument is towards the inner wall lasing of shell, process behind the speculum multiple reflection, the convergent lens who locates through the light -emitting window reveals, the image acquisition unit sets up the outside of light -emitting window, just the photosurface orientation of image acquisition unit convergent lens. The structure has been simplified as far as possible to this particulate matter detection appearance, better control the cost, small, portable to reduced the requirement to service conditions, consequently easy operation has greatly improved audient's scope.
Description
Technical field
This utility model relates to a kind of portable particulate matter detector.
Background technology
In recent years, the pollution problem of Atmospheric particulates is especially prominent.The particulate matter of different-grain diameter is along with people
Body breathes the respiratory tract position that deposition is different, and wherein particle diameter is blocked at the particulate matter of 10～100 μm
Outside nasal cavity；2.5～10 μm particulate matter major parts retain in nasopharynx district；0.01～2.5 μm particulate matters
Being deposited on bronchus and pulmonary, also referred to as PM 2.5 particulate matter, to harm maximum.Air hollow
Aerodynamic diameter is defined as PM2.5 less than the suspended particulate substance of 2.5 μm.At present, PM 2.5
Monitoring and effectively improvement that grain thing pollutes are the targets of China environmental protection department and national government, to people
Healthy living have important practical significance.Existing main air pm2.5 detection method includes: 1,
Laser inductive fluorescence method, utilizes laser-induced microparticle to high level transition, then is returned to low-lying level by high level
Time outwards released energy by light form, produce fluorescence, it is fast that the advantage of the method is in response to speed, sensitivity
High with precision, shortcoming is that cost is too high, not Portable belt, and structure is the most accurate, to using environmental requirement
Higher.2, gravimetric method, the most widely method, use distinct methods to isolate in test sample
Tested composition, weighs weight with ultramicrobalance, and to calculate its content, its advantage is that can to measure kind many,
Precision is higher, and shortcoming is to measure continuously, uses loaded down with trivial details.3, oscillating balance method, utilizes object
Relation between eigentone and its quality carrys out gravimetry, allows gas to be measured utilize filter by filter membrane
The change of film frequency of vibration deduces the change of filter membrane quality.The shortcoming of the method is to professional skill requirement
Height, general population is difficult to use.
Utility model content
This utility model to solve that existing particulate matter detecting instrument is bulky, portability is poor and
The technical problem that operation is complicated, it is proposed that a kind of portable particulate matter detector, can solve the problems referred to above.
In order to solve above-mentioned technical problem, this utility model is achieved by the following technical solutions:
A kind of portable particulate matter detector, including shell, laser instrument, image acquisition units, described outside
Shell has air inlet, air outlet and a light-emitting window, at least at wherein the one of described air inlet and air outlet
Port is provided with air pump, is sealed with collecting lens at described light-emitting window, and the inwall of described shell is arranged
Having reflecting mirror, laser instrument is towards the interior wall emission laser of shell, after described reflecting mirror multiple reflections,
Collecting lens at light-emitting window appears, and described image acquisition units is arranged on the outside of described light-emitting window,
And the photosurface of described image acquisition units is towards described collecting lens.
Further, described air inlet is provided with filter paper.
Further, it is additionally provided with attenuator at described light-emitting window.
Further, described image acquisition units is CCD camera or CMOS camera.
Further, it is respectively arranged with an air pump at described air inlet and air outlet, is arranged at air inlet
Air pump be air intake pump, be arranged at the air pump at air outlet for going out air pump.
Further, described mirror surface has and adds fluorine coating.
Further, described mirror surface is provided with ultrasound wave filter.
Above-mentioned technical solutions of the utility model are used to provide the benefit that: to simplify structure as far as possible, preferably
Control cost, volume is little, it is simple to carry, and reduce to use condition requirement, simple to operate,
Therefore audient's scope is drastically increased.
Accompanying drawing explanation
Fig. 1 is a kind of example structure signal of the portable particulate matter detector that this utility model is proposed
Figure.
Detailed description of the invention
Being described principle of the present utility model and feature below in conjunction with accompanying drawing, example is served only for solving
Release this utility model, be not intended to limit scope of the present utility model.
Embodiment one, the present embodiment proposes a kind of portable particulate matter detector, as it is shown in figure 1, bag
Including shell 1, laser instrument 3, image acquisition units 9, described shell 1 has air inlet 11, air outlet
12 and light-emitting window 13, at least at the wherein Single port of air inlet 11 and air outlet 12, it is provided with gas
Pump 7, is sealed with collecting lens 5, the inwall of described shell 1 is provided with reflection at described light-emitting window 13
Mirror 4, laser instrument 3 is towards the interior wall emission laser of shell 1, after described reflecting mirror 4 multiple reflections,
Collecting lens 5 at light-emitting window appears, and described image acquisition units 9 is arranged on described light-emitting window 13
Outside, and the photosurface of described image acquisition units 9 is towards described collecting lens 5.The present embodiment
The operation principle of particulate matter detector is: being arranged on the air pump 7 at air inlet 11 or air outlet 12 will
Extraneous air is sucked in shell 1, and laser launched in shell 1 by laser instrument, through reflecting mirror more than 4 time
After reflection, then assembled by collecting lens, image acquisition units 9 be acquired, according to collection
Image result i.e. can get particle concentration information, and this detector structure simplifies, it is easy to carry, operation letter
Single, reduce the requirement to the condition of use.
In the present embodiment, small semiconductor laser is preferably used light source is provided, use reflecting mirror to make light
Line is multiple reflections in air chamber, extends light path while controlling instrument outside dimension, improves measurement essence
Degree.
It is the diameter suspended particulate substance that is less than 2.5 μm due to what human body was mainly worked the mischief, namely
PM2.5, therefore, the portable particulate matter detector of the present embodiment needs diameter big when measuring PM2.5
Suspended particulate substance in 2.5 μm filters out, and prevents it from affecting certainty of measurement, this reality in being inhaled into shell
Execute in example by being provided with the filter paper 6 that aperture is 2.5 μm, certainly, this reality at described air inlet 11
The particulate matter detector executing example is not limited to detect PM2.5, can be according to the suspension of practically necessary measurement
Grain thing diameter selects the filter paper in suitable aperture.
Light in order to prevent concentrated lens 5 from appearing is too strong and damages the illuminant module of image acquisition units,
It is additionally provided with attenuator 10 at described light-emitting window 13, is used for reducing light intensity and protecting image acquisition units.
In the present embodiment, described image acquisition units can use CCD camera or the CMOS of mobile phone
Camera, according to the CCD camera of mobile phone, then further increases portability.
In order to improve the airflow stability entered in shell, air pump 7 preferably employs low speed air pump, the most not
Reduce pumping efficiency, at described air inlet and air outlet, be preferably respectively arranged with an air pump, be arranged at into
Air pump at air port is air intake pump, is arranged at the air pump at air outlet for going out air pump 8.
In order to prevent particulate matter attachment from reducing reflecting effect on the mirror, described reflecting mirror 4 surface has
Have and add fluorine coating (not shown), it is possible to reduce granule is in the attachment of reflecting surface.
Or, it is also possible to there is ultrasound wave filter (not shown) in described reflecting mirror 4 surface configuration,
Utilize the vibration of hyperfrequency, dust is shaken off.Can also have on reflecting mirror 4 surface simultaneously add fluorine coating
And have ultrasound wave filter in reflecting mirror 4 surface configuration, reduce the dust shadow for mirror surface further
Ring.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all
Within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, all
Within protection domain of the present utility model should be included in.
Claims (7)
1. a portable particulate matter detector, it is characterised in that: include shell, laser instrument, image
Collecting unit, described shell has air inlet, air outlet and light-emitting window, at least at described air inlet
Be provided with air pump at the wherein Single port of air outlet, be sealed with collecting lens at described light-emitting window, described
Be provided with reflecting mirror on the inwall of shell, laser instrument towards the interior wall emission laser of shell, through described instead
After penetrating mirror multiple reflections, the collecting lens at light-emitting window appears, and described image acquisition units is arranged on institute
State the outside of light-emitting window, and the photosurface of described image acquisition units is towards described collecting lens.
Portable particulate matter detector the most according to claim 1, it is characterised in that enter described in:
Filter paper it is provided with at air port.
Portable particulate matter detector the most according to claim 2, it is characterised in that go out described in:
It is additionally provided with attenuator at light mouth.
Portable particulate matter detector the most according to claim 3, it is characterised in that: described figure
As collecting unit is CCD camera or CMOS camera.
Portable particulate matter detector the most according to claim 4, it is characterised in that enter described in:
Being respectively arranged with an air pump at air port and air outlet, the air pump being arranged at air inlet is air intake pump, arranges
Air pump at air outlet is for going out air pump.
6. according to the portable particulate matter detector described in any one of claim 1-5, it is characterised in that:
Described mirror surface has and adds fluorine coating.
7. according to the portable particulate matter detector described in any one of claim 1-5, it is characterised in that:
Described mirror surface is provided with ultrasound wave filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620340218.6U CN205506632U (en) | 2016-04-18 | 2016-04-18 | Portable particulate matter detection appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620340218.6U CN205506632U (en) | 2016-04-18 | 2016-04-18 | Portable particulate matter detection appearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205506632U true CN205506632U (en) | 2016-08-24 |
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ID=56706172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620340218.6U Expired - Fee Related CN205506632U (en) | 2016-04-18 | 2016-04-18 | Portable particulate matter detection appearance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205506632U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872318A (en) * | 2017-03-13 | 2017-06-20 | 中山大学 | A kind of device and method of high precision test haze particle |
| CN109470614A (en) * | 2019-01-11 | 2019-03-15 | 海南大学 | A kind of haze real-time monitoring device |
| CN110057730A (en) * | 2019-03-12 | 2019-07-26 | 天津大学 | A kind of human body particulate matter active inhaled concentration test method |
-
2016
- 2016-04-18 CN CN201620340218.6U patent/CN205506632U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872318A (en) * | 2017-03-13 | 2017-06-20 | 中山大学 | A kind of device and method of high precision test haze particle |
| CN109470614A (en) * | 2019-01-11 | 2019-03-15 | 海南大学 | A kind of haze real-time monitoring device |
| CN110057730A (en) * | 2019-03-12 | 2019-07-26 | 天津大学 | A kind of human body particulate matter active inhaled concentration test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20180418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |