CN205826472U - Dust sensor - Google Patents
Dust sensor Download PDFInfo
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- CN205826472U CN205826472U CN201620783139.2U CN201620783139U CN205826472U CN 205826472 U CN205826472 U CN 205826472U CN 201620783139 U CN201620783139 U CN 201620783139U CN 205826472 U CN205826472 U CN 205826472U
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Abstract
This utility model relates to a kind of dust sensor, including: Optical Transmit Unit；Being the light receiving unit that an angle is arranged with described Optical Transmit Unit, be formed with photosensitive measured zone between described light receiving unit and described Optical Transmit Unit, described light receiving unit receives light that described Optical Transmit Unit sends and is converted into the signal of telecommunication；Corresponding described photosensitive measured zone arranges and forms the air stream formation unit of air stream in described photosensitive measured zone；And the processor being connected with described light receiving unit, described processor receives the pulse signal that the described signal of telecommunication, the treated particle diameter changed into dust and concentration are corresponding.Dust sensor of the present utility model utilizes optical method for measuring dust size and concentration, the particle diameter measured can reach 0.9 micron, compared with laser diode and weight method, greatly reduce cost, and volume can accomplish the least, meet industry and the household electrical appliances requirement to sensor performance, there is the highest cost performance and practical value.
Description
Technical field
This utility model relates to dust detection field, refers in particular to a kind of dust sensor.
Background technology
The quality of quality of air environment increasingly causes the attention of people, and dust is as dirt most important in air in recent years
One of dye thing receives much concern.Dust is very harmful to the mankind, especially small size particle, can float in an atmosphere for a long time,
Being difficult to be deposited to ground, easily enter human respiratory tract, and particle diameter is the least, the sedimentation location in human respiratory tract is the deepest, harm
The biggest.Therefore, the measurement of dust concentration has being of great significance in environmental conservation, is in the urgent need to address asking
Topic.
" ambient air quality " of the up-to-date revision in national environmental protection portion is by aerodynamic equivalent diameter in surrounding air
The particulate matter of≤10 μm is referred to as pellet (PM10)；By aerodynamic equivalent diameter≤2.5 μm in surrounding air
Particulate matter is referred to as fine particle (PM2.5).PM10 is easily deposited on upper respiratory tract, causes various disease；PM2.5 can be deposited on and prop up
Trachea and pulmonary, and be more easy to adsorb virulent material and enter internal, it is detrimental to health.Therefore, to dust in air concentration
Accurately measure and seem increasingly important.
At present the detector of dust is mainly had several: the first is that dust concentration based on gravimetric method detects equipment.This
It is the most direct, most reliable method, it is generally used for the place of meteorology or some particular/special requirements, it is possible to verify other detection method
The most accurate.Gravimetric method needs dust sickle to distinguish different particle diameters, and therefore instrument cost is high, and volume is big, it is difficult to small-sized
Change, it is impossible to promote in industry and domestic electric appliance.The second is the laser particle counter of optically-based method.Particle
Enumerator needs the light source of high-precision linear, and cost is the most of a relatively high, it is also difficult to accomplish large-scale promotion.
Utility model content
The purpose of this utility model is to overcome the defect of prior art, it is provided that a kind of dust sensor, solves existing powder
The problem that the cost that dirt detector exists is high, volume is big and is difficult to large-scale promotion.
The technical scheme realizing above-mentioned purpose is:
This utility model one dust sensor, including:
Optical Transmit Unit；
It is the light receiving unit that an angle is arranged with described Optical Transmit Unit, described light receiving unit and described light emission list
Being formed with photosensitive measured zone between unit, described light receiving unit receives light that described Optical Transmit Unit sends and is converted into telecommunications
Number；
Corresponding described photosensitive measured zone arranges and forms the air stream of air stream in described photosensitive measured zone and forms list
Unit；And
The processor being connected with described light receiving unit, described processor receive the described signal of telecommunication, treated change into
The pulse signal that the particle diameter of dust is corresponding with concentration.
Dust sensor of the present utility model utilizes optical method for measuring dust size and concentration, and the particle diameter of measurement can reach
0.9 micron, compared with laser diode and weight method, greatly reduce cost, and volume can be accomplished the least, such as 59mm*
45mm*20mm, meets industry and the household electrical appliances requirement to sensor performance, has the highest cost performance and practical value.
Further improvement is that of this utility model dust sensor, described Optical Transmit Unit includes light emitting diode and sets
Collimating lens in described light emitting diode front.
Further improvement is that of this utility model dust sensor, described light receiving unit includes collecting lens and is located at
The phototriode at described collecting lens rear.
Further improvement is that of this utility model dust sensor, also includes being connected to described light receiving unit and described
Pre-amplifier unit between processor.
Further improvement is that of this utility model dust sensor, between described pre-amplifier unit and described processor
Connect and have filter unit.
Further improvement is that of this utility model dust sensor, described air stream forms unit and includes forming hot-air
The resistance heater of stream.
Further improvement is that of this utility model dust sensor, described air stream forms unit and includes and outside air
The air channel structure of connection and the fan being located in described air channel structure, the exhaust outlet of described air channel structure is located at described photosensitive measurement
The bottom in region.
Further improvement is that of this utility model dust sensor, also includes protecting shell, and described protection jacket sets
Formed on unit and described processor, outside described protection in described Optical Transmit Unit, described light receiving unit, described air stream
On shell, corresponding described photosensitive measured zone offers air inlet and gas outlet, and described air inlet forms unit pair with described air stream
Should arrange.
Further improvement is that of this utility model dust sensor, described light receiving unit is covered with metallic shield.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of this utility model dust sensor.
Fig. 2 is the structural representation of this utility model dust sensor.
Fig. 3 is the front view of this utility model dust sensor.
Detailed description of the invention
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
This utility model provides a kind of dust sensor, is used for measuring dust, pollen, soft flocks and smoke from cigarette etc.
Grain thing, utilizes Optical Transmit Unit and light receiving unit to form a photosensitive measured zone, when the air carrying dust flows into
During photosensitive measured zone, can produce absorption and scattering, the scattered light that dust produces is received by light receiving unit, is converted into telecommunications
Number, by particle diameter and the concentration of the proper dust of processing of circuit.This dust sensor can be used for air cleaner, air conditioning system, sky
The equipment such as air filter, to control the operation of equipment, it is also possible to for indoor air quality monitoring, detect and show that dust is dense
Degree.Dust sensor of the present utility model can accomplish small size, low cost, is suitable for industry and field of household appliances.Below in conjunction with
This utility model dust sensor is illustrated by accompanying drawing.
As it is shown in figure 1, this utility model dust sensor includes Optical Transmit Unit 11, light receiving unit 12, air manifold
Becoming unit 14 and processor 15, Optical Transmit Unit 11 is used for launching light, and light receiving unit 12 and Optical Transmit Unit 11 are in a folder
Angle is arranged, and is formed with photosensitive measured zone 13 between this light receiving unit 12 and Optical Transmit Unit 11, and this light receiving unit 12 is used
In receiving the light that sends of Optical Transmit Unit 12 and the light of reception being converted into the signal of telecommunication, the light that Optical Transmit Unit 11 is launched is injected into
In photosensitive measured zone 13, being blocked by the dust in photosensitive measured zone 13, dust produces scattered light, and scattered light is by light-receiving list
Unit 12 receives, and then is converted to the signal of telecommunication.Air stream forms the corresponding photosensitive measured zone 13 of unit 14 and arranges, for photosensitive
Forming air stream in measured zone 13, it is interior with shape that outside air is sent to photosensitive measured zone 13 by this air stream formation unit 14
Become air stream, this air stream carries dust.Processor 15 is connected with light receiving unit 12, is used for receiving light receiving unit 12
The signal of telecommunication formed, converts electrical signals into the particle diameter with dust and pulse signal corresponding to concentration through processing.
The signal of telecommunication produced due to light receiving unit 12 is the most weak, for improving the precision of detection, at light receiving unit 12 and place
Connect between reason device 15 and have pre-amplifier unit 16, be amplified processing, preposition to the signal of telecommunication by pre-amplifier unit 16
Connect between amplifying unit 16 and processor 15 and have filter unit 17, be filtered processing, outside avoiding by filter unit 17
Boundary's power supply ripple and the impact of electromagnetic radiation, improve the stability of sensor detection.
Optical Transmit Unit 11 includes light emitting diode 111 and is located at the collimating lens 112 in light emitting diode 111 front, sends out
The light that optical diode 11 sends is injected into photosensitive measured zone 13 after collimating lens 112.Light receiving unit 12 includes optically focused
Lens 121 and the phototriode 122 being located at collecting lens 121 rear, this phototriode 122 can also use photodiode
Replacing, the optical axis of this phototriode 122 and light emitting diode 111 intersects, and defines photosensitive measured zone 13.When carrying dust
Air stream when photosensitive measured zone 13, the light that photodiode 111 sends is blocked by dust, dust produce scattered light
Gathered phototriode 122 by collecting lens 121, the scattered light signal received is converted into the signal of telecommunication, according to scattered light intensity
With particle diameter and the proportionate relationship of concentration of tested dust granules thing, dust concentration can be measured.
Air stream forms unit 14 can use natural airflow, it is possible to use fan or air pump mode to form air-flow.As this
One better embodiment of utility model, air stream forms unit 14 and includes being formed the resistance heater of hot-air stream, utilizes electricity
Resistance heater forms hot-air stream, belongs to natural airflow.The bottom of photosensitive measured zone 13 is located at by this resistance heater, and resistance adds
The heated formation of hot device thermal current upwards, is brought into photosensitive measured zone 13 extraneous air, so can be formed stable
Air-flow, it is easy to accomplish, and low cost, the flow velocity of this hot-air stream is not too large, it can be ensured that the certainty of measurement of dust.As
Another better embodiment of the present utility model, air stream forms unit 14 and includes the air channel structure connected with outside air and set
Fan in air channel structure, the exhaust outlet of this air channel structure is located at the bottom of photosensitive measured zone 13, is utilized fan by the external world
Wind form air stream and be sent to photosensitive measured zone 13, control the rotating speed of fan, to form the air stream of constant flow rate, it is ensured that
The certainty of measurement of dust.
Dust sensor in actual use, from the power supply noise of user side, the radiation that high-power electric appliance circuit produces
Or conducted noise can affect the signal of sensor, affect the certainty of measurement of dust sensor.Filter unit 17 can be in certain journey
Electromagnetic interference possible in environment is prevented, for improving the ability of electromagnetism interference further, in light receiving unit 12 upper cover on degree
It is provided with metallic shield 19, utilizes the electromagnetic interference of metallic shield 19 radiation-screening.By filter unit 17 and metallic shield
The effect of noise such as cover 19 can effectively prevent extraneous power supply ripple, electromagnetic radiation, improve the stability of sensor.
Shown in Fig. 2 and Fig. 3, dust sensor of the present utility model also includes protection shell 18, this protection shell
18 cover on Optical Transmit Unit 11, light receiving unit 12, air stream formation unit 14 and processor 15, to play protection work
With, Optical Transmit Unit 11 and light receiving unit 12 can be protected by this protection shell 18, prevent external environmental light to dust
The impact measured, and the air-flow of the dust that is easy to carry about with one flows to photosensitive measured zone 13.Protection shell 18 is connected solid with pcb board 20
Fixed, this pcb board is installed processor 15, pre-amplifier unit 16 and filter unit 17, this filter unit 17 uses filtered electrical
Hold.Offering air inlet 181 and gas outlet 182 on protection shell 18, this air inlet 181 and gas outlet 182 are for air stream
Inlet and outlet, air stream forms unit 14 and is located at air inlet 181, from air inlet 181, extraneous air is brought into guarantor
Protecting in shell 18, and then be sent to photosensitive measured zone 13 and carry out dust detection, this air flows through gas outlet 182 and discharges outside protection
Shell 18.
Processor 15, according to scattered light intensity and the particle diameter of tested dust granules thing and the proportionate relationship of concentration, can measure powder
Dust concentration.The signal of telecommunication that light receiving unit 12 is formed, after pre-amplifier unit 16 processing and amplifying, is sent into filter unit 17 and is carried out
Filtering, the most treated device processes, and the particle diameter of dust is the least, and the light scattering signal of formation is the most weak, therefore, the circuit of this processor
High-precision signal extraction and processing method is used to obtain particle diameter and the concentration signal of dust granules thing.Processor 15 is to the signal of telecommunication
After processing, process after dust concentration and particle diameter signal with voltage, current signal, or PWM waveform, or numeral letter
Number output.Because of different-grain diameter, it is different that the dust granules thing of variable concentrations obtains voltage signal.Data processing unit uses and reads electricity
The mode of pressure threshold value, changes into impulse form through the signal of telecommunication.Time pulse signal that different-grain diameter is corresponding with concentration and density are not
With, thus can obtain particle diameter and the concentration of dust according to the time of pulse signal and density.Survey due to dust sensor
Amount error can be affected by light emission and light receiving unit and measured object particle diameter distribution etc., it is therefore desirable to the output to sensor
It is corrected.Processor 15 can regulate lower corresponding output valve scope according to standard dust particle diameter and concentration, by each sensor
Carry out 2 calibrations.At the calibration point set, sensor can be according to the output valve of calibration point, and the parameter within adjustment, to obtain
Preferably linear convergent rate and concordance, the requirement of precision.
Having the beneficial effect that of this utility model dust sensor
Use light emitting diode and photodiode to measure particle diameter and the concentration of dust, and the particle diameter measured can reach
0.9 micron, compared with using laser diode and weight method, greatly reduce cost, the particle diameter of dust and dense can be measured again
Degree, has the highest cost performance and practical value.And the volume of sensor disclosure satisfy that small size requirement, it is suitable for industry and family
Electrical domain.
Use light scattering method, as long as the particle diameter of tested particulate matter is more than optical wavelength, it is possible to produce scattered light, so may be used
To improve precision and the particle size range that particulate matter is measured.
Being described in detail this utility model above in association with accompanying drawing embodiment, those skilled in the art can root
According to described above, this utility model made many variations example.Thus, some details in embodiment should not be constituted this practicality
Novel restriction, this utility model by the scope that defines using appended claims as protection domain of the present utility model.
Claims (9)
1. a dust sensor, it is characterised in that including:
Optical Transmit Unit；
Be the light receiving unit that an angle is arranged with described Optical Transmit Unit, described light receiving unit and described Optical Transmit Unit it
Between be formed with photosensitive measured zone, described light receiving unit receives light that described Optical Transmit Unit sends and is converted into the signal of telecommunication；
Corresponding described photosensitive measured zone arranges and forms the air stream formation unit of air stream in described photosensitive measured zone；With
And
The processor being connected with described light receiving unit, described processor receives the described signal of telecommunication, treated changes into and dust
The particle diameter pulse signal corresponding with concentration.
2. dust sensor as claimed in claim 1, it is characterised in that described Optical Transmit Unit includes light emitting diode and sets
Collimating lens in described light emitting diode front.
3. dust sensor as claimed in claim 1 or 2, it is characterised in that described light receiving unit include collecting lens and
It is located at the phototriode at described collecting lens rear.
4. dust sensor as claimed in claim 1, it is characterised in that also include being connected to described light receiving unit and described
Pre-amplifier unit between processor.
5. dust sensor as claimed in claim 4, it is characterised in that between described pre-amplifier unit and described processor
Connect and have filter unit.
6. dust sensor as claimed in claim 1, it is characterised in that described air stream forms unit and includes forming hot-air
The resistance heater of stream.
7. dust sensor as claimed in claim 1, it is characterised in that described air stream forms unit and includes and outside air
The air channel structure of connection and the fan being located in described air channel structure, the exhaust outlet of described air channel structure is located at described photosensitive measurement
The bottom in region.
8. dust sensor as claimed in claim 1, it is characterised in that also including protecting shell, described protection jacket sets
Formed on unit and described processor, outside described protection in described Optical Transmit Unit, described light receiving unit, described air stream
On shell, corresponding described photosensitive measured zone offers air inlet and gas outlet, and described air inlet forms unit pair with described air stream
Should arrange.
9. dust sensor as claimed in claim 1, it is characterised in that described light receiving unit is covered with metallic shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620783139.2U CN205826472U (en) | 2016-07-22 | 2016-07-22 | Dust sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620783139.2U CN205826472U (en) | 2016-07-22 | 2016-07-22 | Dust sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205826472U true CN205826472U (en) | 2016-12-21 |
Family
ID=57560594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620783139.2U Active CN205826472U (en) | 2016-07-22 | 2016-07-22 | Dust sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205826472U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979914A (en) * | 2017-04-18 | 2017-07-25 | 中山市恩尚环保科技有限公司 | Dust concentration sensor based on light scattering principle |
| CN107462502A (en) * | 2017-08-02 | 2017-12-12 | 北京海克智动科技开发有限公司 | Measuring concentration of granules in certain system |
| CN108918364A (en) * | 2018-03-30 | 2018-11-30 | 古麒羽绒股份公司 | A kind of feather down dust, the detection device and its detection method for boring suede composite performance |
| WO2019056443A1 (en) * | 2017-09-20 | 2019-03-28 | 安费诺(常州)连接系统有限公司 | Sensor and method for detecting dust retention of filter |
| CN109580442A (en) * | 2019-01-10 | 2019-04-05 | 中煤科工集团重庆研究院有限公司 | A kind of non-maintaining laser dust concentration sensor |
| CN109752301A (en) * | 2019-03-05 | 2019-05-14 | 北京英视睿达科技有限公司 | The measuring device and check and correction factor determination method of total suspended particles concentration |
| CN113083797A (en) * | 2021-03-30 | 2021-07-09 | 中国科学院计算技术研究所 | Automatic detection dust removal device and dust removal case |
-
2016
- 2016-07-22 CN CN201620783139.2U patent/CN205826472U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979914A (en) * | 2017-04-18 | 2017-07-25 | 中山市恩尚环保科技有限公司 | Dust concentration sensor based on light scattering principle |
| CN107462502A (en) * | 2017-08-02 | 2017-12-12 | 北京海克智动科技开发有限公司 | Measuring concentration of granules in certain system |
| WO2019056443A1 (en) * | 2017-09-20 | 2019-03-28 | 安费诺(常州)连接系统有限公司 | Sensor and method for detecting dust retention of filter |
| CN108918364A (en) * | 2018-03-30 | 2018-11-30 | 古麒羽绒股份公司 | A kind of feather down dust, the detection device and its detection method for boring suede composite performance |
| CN108918364B (en) * | 2018-03-30 | 2021-04-09 | 安徽古麒绒材股份有限公司 | Detection device and detection method for feather down dust and down drilling composite performance |
| CN109580442A (en) * | 2019-01-10 | 2019-04-05 | 中煤科工集团重庆研究院有限公司 | A kind of non-maintaining laser dust concentration sensor |
| CN109752301A (en) * | 2019-03-05 | 2019-05-14 | 北京英视睿达科技有限公司 | The measuring device and check and correction factor determination method of total suspended particles concentration |
| CN113083797A (en) * | 2021-03-30 | 2021-07-09 | 中国科学院计算技术研究所 | Automatic detection dust removal device and dust removal case |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |