CN208206735U - A kind of laser dust sensor - Google Patents
A kind of laser dust sensor Download PDFInfo
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- CN208206735U CN208206735U CN201820657305.3U CN201820657305U CN208206735U CN 208206735 U CN208206735 U CN 208206735U CN 201820657305 U CN201820657305 U CN 201820657305U CN 208206735 U CN208206735 U CN 208206735U
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- laser
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- air
- dust
- laser emitter
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Abstract
The utility model discloses a kind of laser dust sensors comprising shell, the shell are connected in sequence by upper casing, middle shell, lower casing, and air inlet, air outlet is arranged using being detachably connected in the upper casing, middle shell, the connection between lower casing on the shell；Laser emitter, the laser emitter are installed in shell, and the laser emitter is used to emit the air-flow that laser irradiation passes through the ventilating duct；Circuit board, the circuit board is set to the enclosure interior, photoelectric testing sensor, MCU are provided on the circuit board, the optical signal that particle of the received laser irradiation in the air-flow is scattered generation by the photoelectric testing sensor is converted into electric signal and sends MCU to, and MCU is by handling the electric signal to obtain the size, number and concentration of the particle of the air-flow.The sensor structure of the utility model is simple, stablizes, and detection accuracy is high, testing result consistency is good.
Description
Technical field
The utility model belongs to dust detection field, and in particular to a kind of laser dust sensor.
Background technique
Laser dust sensor module is that the concentration of dust in air is detected using optical scattering principle, one built in sensor
A laser emitting diode and a photoelectric testing sensor when work, are first directed at dust detection zone by laser emitting diode
Emit laser pulse, laser can generate scattering light when encountering dust, and some scattered light returns to photoelectric testing sensor, photoelectricity
The optical signal obtained is converted electric signal by detection sensor, then further analyzes scattering light in electric signal by analyzing circuit
The information such as intensity, pulse frequency, wavelength amplitude reflect the concentration levels of dust in air.
Existing laser dust sensor detection accuracy is not high, and output result is inconsistent, and size is also larger.In addition,
Existing laser dust sensor generic persistence work causes its laser tube lifetime not grown, to influence the longevity of entire sensor
Life, and be in practical applications and there are many scene not need laser sensor to continue working.Furthermore the fan of existing sensor
Revolving speed is difficult to be consistent, and causes testing result inaccurate, testing result deviation range is very big.
Utility model content
To solve the above-mentioned problems, high, test result that the purpose of this utility model is to provide a kind of detection accuracy
The good laser dust sensor of consistency, to achieve the above object, the utility model is achieved by following technical scheme:
A kind of laser dust sensor described in the utility model, comprising:
Shell, the shell are connected in sequence by upper casing, middle shell, lower casing, between the upper casing and the middle shell, lower casing
It is all made of and snaps connection between middle shell, air inlet, air outlet are set on the shell；
Laser emitter, the laser emitter are installed in shell, and the laser emitter is for emitting laser irradiation
By the air-flow of the enclosure interior；
Circuit board, is connected between the middle shell and the circuit board using screw, and the circuit board is set to the shell
Inside, is provided with photoelectric testing sensor, MCU on the circuit board, and the photoelectric testing sensor is by the received laser
The particle that is irradiated in the air-flow and the optical signal for scattering generation is converted into electric signal and sends MCU to, MCU passes through described in processing
Electric signal is to obtain the size, number and concentration of the particle of the air-flow.
Further, be provided with air extractor, dust detection zone in the lower casing, the lower casing surface be provided with it is described into
Air port, the air outlet form cavity between the lower casing and circuit board, the air inlet is connected to the cavity, the sky
Chamber is connected to the dust detection zone, and the air extractor is set at the air outlet, and the air-flow is via the air inlet
After entering the cavity, is entered after the dust detection zone by the cavity and excluded by the air outlet.
Further, the laser emitter is installed module by independent laser emitter and is installed in the middle shell,
It is provided with light barrier in the laser emitter installation module, multiple convergent holes of centerline collineation are the multiple
Convergent hole sets up separately in the light barrier two sides, dust detection zone described in the laser emitter face.
Further, the laser beam that laser transmitter projects go out is parallel with the photoelectric testing sensor, the laser
The light sensing face of photoelectric testing sensor described in the focus face of light beam.
Further, the part of dust detection zone described in the laser emitter installation module face is provided with dust inspection
Chamber is surveyed, the top of the dust test chamber is sealed using light absorbent.
Further, the upper casing, lower casing are all made of conductive material production.
Further, electric installation is connected between the upper casing and the lower casing.
Further, the MCU is connect with the air extractor, the laser emitter.
Further, it is connected between the laser emitter installation module and the middle shell using detent.
Further, the height of the shell is less than or equal to 12mm.
Compared with prior art, the utility model has the beneficial effects that
1. the upper casing of the utility model, middle shell, lower casing are connected between circuit board and middle shell using screw using snapping connection
It connects, so that the stable structure of sensor, is not susceptible to shake, and then improves detection accuracy and testing result consistency, furthermore
Due to handling data using MCU, efficiency and accuracy are high.
2. the utility model is used and is connected between MCU and fan and laser.It is controlled by MCU, on the one hand can make fan
Revolving speed is consistent, so that the flowing velocity of the air in dust test chamber be made to be constant, raising detection accuracy, testing result
On the other hand consistency is controlled, controllable rotation speed of the fan by MCU, adapts to different test scene requirements.In addition, passing through
MCU is controlled, it can be achieved that laser service intermittent, improves the service life of laser.
3. the utility model is provided with light barrier, non-parallel laser, and the multiple laser through holes of cooperation, limit can be absorbed
Laser beam diverging processed, can be improved detection accuracy.
4. the light sensing face of photoelectric testing sensor described in the focus face of the laser beam of the utility model, Ke Yibao
The testing result consistency of the light intensity of light sensing face induction is demonstrate,proved, and then improves testing result precision, testing result consistency.
5. the upper casing of the utility model, lower casing are all made of conductive material production, not only lightweight, but also increase anti-interference energy
The testing result consistency and precision of testing result can be improved in power.
Detailed description of the invention
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the lower casing and middle shell splicing structure schematic diagram of the utility model.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
As shown in FIG. 1 to FIG. 2, a kind of laser dust sensor described in the utility model, comprising: shell 100, the shell
Body is connected in sequence by upper casing 101, middle shell 102, lower casing 103, and upper casing 101, middle shell 102, the connection between lower casing 101 use
It is detachably connected, dismountable connection type can connect for spiral shell mosquito, buckle, be cementing, and air inlet is arranged on the shell 100
105, air outlet 106；
Laser emitter 201, the laser emitter are installed in shell, and the laser emitter 201 is sharp for emitting
Light irradiation is by the air-flow inside the shell 100；
Circuit board 300, the circuit board are set to the enclosure interior, and Photoelectric Detection sensing is provided on the circuit board
Device, MCU (photoelectric testing sensor, MCU are not shown in the figure), the photoelectric testing sensor is by the received laser irradiation
Particle in the air-flow and the optical signal for scattering generation is converted into electric signal and sends MCU to, MCU is by handling the telecommunications
Number to obtain the size, number and concentration of the particle of the air-flow.
Specifically, MCU reflects dust in air situation by intensity, pulse frequency, wavelength amplitude of the scattering light etc.,
And dust size, number, concentration data are exported by external interface.
Specifically, multiple buckles 107 are provided on middle shell 102 in its circumferential direction, upper casing 101, lower casing 103 are in its circumferential direction
Multiple and block button hole 108 that is being clasped, upper casing 101 and middle shell 102 are set, are all made of buckle between middle shell 102 and lower casing 103
Cooperation is connected with block button hole, is connected between middle shell 102 and circuit board using screw.
In this embodiment, due between upper casing 101, middle shell 102, lower casing 103 using detachably making to connect, circuit board with
It is connected between middle shell using screw, so that the stable structure of sensor, is not susceptible to shake, and then improve detection accuracy and inspection
Result consistency is surveyed, additionally due to handling data using MCU, efficiency and accuracy are high.
Specifically, it is provided with air extractor 400 in the lower casing 103, is provided with dust detection zone in the middle shell 102
109,103 surface of lower casing is provided with the air inlet 105, the air outlet 106, the lower casing 103 and circuit board 300 it
Between form cavity (cavity is being not shown in the figure), the air inlet 105 be connected to the cavity, and the cavity and the dust are examined
Area 109 to be surveyed to be connected to by the venthole opened up on circuit board 300, the air extractor 400 is set to 106 at the air outlet,
After the air-flow enters the cavity via the air inlet 105, enter after the dust detection zone 109 via cavity by institute
Air outlet exclusion is stated, the flow direction of air-flow in the housing is as shown by the arrows in Figure 2.Due to by air inlet 105, air outlet 106 and
Air extractor 400 is all disposed within lower casing, not only simplifies the processing technology of shell, but also avoids air-flow from air inlet 105 to out
Too long in flow between air port 106 and cause dust to be attached on shell wall and detection accuracy declines caused by accumulation of ash
Problem.
Specifically, the laser emitter is installed module 200 by independent laser emitter and is installed in the middle shell,
The laser emitter is installed and is provided with light barrier 202 in module 200, multiple convergent holes 203 of centerline collineation,
The multiple convergent hole sets up separately in 202 two sides of light barrier, dust detection zone 109 described in 201 face of laser emitter.
Due to using the laser emitter installation module 200 independently of shell, laser emitter 201 can be mounted on safely, quickly
On shell.The non-parallel light of spilling can be absorbed in the light barrier 202 of use, and multiple convergent holes 203 of grating orchid two sides can
To limit the diverging of laser beam, guarantee the depth of parallelism of laser beam.Dust detection zone described in 201 face of laser emitter
109, the laser beam propagation direction that laser emitter 201 is launched is parallel with the photoelectric testing sensor, avoids laser light
Refraction, reflection etc. occur in the way for propagating to dust detection zone 109 by laser emitter 201 and causes detection error for beam.
Specifically, the laser beam that laser emitter 201 is launched is parallel with the photoelectric testing sensor, laser beam
Focus face described in photoelectric testing sensor light sensing face, it is ensured that light sensing face induction light intensity detection knot
Fruit consistency, and then improve testing result precision, testing result consistency.
Specifically, the laser emitter installs module 200, is provided with photoelectric testing sensor mounting hole 204, photoelectricity inspection
Sensor is surveyed to be set on the circuit board 300 by the mounting hole.
Specifically, the part of dust detection zone 109 described in laser emitter installation 200 face of module is provided with powder
Dirt test chamber 205, the test chamber top are sealed using light absorbent, if black material makes, avoid test chamber secondary
Detection, to improve detection accuracy.In addition, also setting up light trapping 206 in laser emitter installation module 200, light trapping 206 can
Unscattered laser beam after test chamber 205 is absorbed, to avoid testing result deviation caused by secondary detection, from
And improve testing result precision.Light trapping is that laser emitter installs the cavity opened up in module 200, can be opened up on cavity wall
Wave groove, to improve absorptivity.
Specifically, the upper casing 101, lower casing 103 are all made of conductive material production, increase anti-interference ability, improve detection
Precision and testing result consistency.
Specifically, spring mounting hole 110 is arranged in middle shell 102, is connected with and leads between the upper casing 101 and the lower casing 103
Electric installation, such as power spring, conducting rod, so that upper casing, circuit board, being electrical connected between lower casing carries out six faces to sensor
Full-shield is anti-interference, further promotes this practical new detection accuracy and testing result consistency.
Specifically, the MCU is connect with the air extractor 400, the laser emitter 201.The laser emitter
It is connected with the MCU.By MCU control, it can be achieved that 201 service intermittent of stimulated emission light device, improves making for stimulated emission light device 201
Use the service life.Air extractor 400 is controlled by MCU, on the one hand the speed of exhaust of air extractor 400 can be made to be consistent, to make
The flowing velocity of air in dust test chamber 205 be it is constant, improve detection accuracy, on the other hand, controlled by MCU, can
The speed of exhaust for regulating and controlling air extractor 400, adapts to different test scene requirements.
Specifically, when using fan as air extractor, fan is controlled by MCU, on the one hand rotation speed of the fan can be made to keep
Unanimously, thus make the flowing velocity of the air in dust test chamber be it is constant, improve detection accuracy, on the other hand, pass through MCU
Control, controllable rotation speed of the fan adapt to different test scene requirements.
Specifically, it is connected between the laser emitter installation module 200 and the middle shell 102 using detent, on the one hand,
Laser emitter easy to disassemble installs module 200, and on the other hand, laser emitter is installed in the setting of module 200 on shell 102, and
It is not to be all set in lower casing 103 with air extractor 400, photoelectric testing sensor, makes each component layout of the utility model more
Adduction reason, reduces the size of sensor.
Specifically, the height of the shell is less than or equal to 12mm, so that the sensor of the utility model can be used for installing sky
Between in narrow detection.
Specifically, it is additionally provided with an opening 111 on the upper casing 101, the data transmission in the opening 111 and middle plate 102
The mounting hole 112 of interface 500 is corresponding, and the data transmission interface 500 is connect with circuit board 300.Pass through data transmission interface
Detection result is passed into user or intelligent terminal.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation, therefore it is all without departing from the content of the technical scheme of the utility model, implement according to the technical essence of the utility model to above
Any modification, equivalent variations and modification, are still within the scope of the technical solutions of the present invention made by example.
Claims (10)
1. a kind of laser dust sensor characterized by comprising
Shell, the shell are connected in sequence by upper casing, middle shell, lower casing, between the upper casing and the middle shell, the lower casing
It is all made of and snaps connection between middle shell, air inlet, air outlet are set on the shell；
Laser emitter, the laser emitter are installed in shell, and the laser emitter is for emitting laser irradiation process
The air-flow of the enclosure interior；
Circuit board is connected between the middle shell and the circuit board using screw, and Photoelectric Detection biography is provided on the circuit board
Particle of the received laser irradiation in the air-flow is scattered generation by sensor, MCU, the photoelectric testing sensor
Optical signal is converted into electric signal and sends MCU to, MCU obtained by handling the electric signal particle of the air-flow size,
Number and concentration.
2. a kind of laser dust sensor according to claim 1, it is characterised in that: be provided with pumping dress in the lower casing
It sets, dust detection zone is equipped in the middle shell, the lower casing surface is provided with the air inlet, the air outlet, the lower casing
Cavity is formed between circuit board, the air inlet is connected to the cavity, and the cavity is connected to the dust detection zone, institute
It states air extractor to be set at the air outlet, after the air-flow enters the cavity via the air inlet, by the sky
Chamber is excluded after the dust detection zone by the air outlet.
3. a kind of laser dust sensor according to claim 2, it is characterised in that: the laser emitter passes through independence
Laser emitter installation module be installed in the middle shell, be provided with light in laser emitter installation module
Fence, multiple convergent holes of centerline collineation, the multiple convergent hole set up separately in the light barrier two sides, the laser emitter
Dust detection zone described in face.
4. a kind of laser dust sensor according to any one of claim 1-3, feature exist: laser transmitter projects
Laser beam out is parallel with the light sensing face of the photoelectric testing sensor, light described in the focus face of the laser beam
The light sensing face of electro-detection sensor.
5. a kind of laser dust sensor according to claim 3, it is characterised in that: the laser emitter installs module
The part of dust detection zone described in face is provided with dust test chamber, and the top of the dust test chamber is close using light absorbent
Envelope.
6. a kind of laser dust sensor according to claim 1, it is characterised in that: the upper casing, lower casing, which are all made of, leads
Electric material production.
7. a kind of laser dust sensor according to claim 6, it is characterised in that: between the upper casing and the lower casing
It is connected with electric installation.
8. a kind of laser dust sensor according to claim 3, it is characterised in that: the MCU and the air extractor,
The laser emitter connection.
9. a kind of laser dust sensor according to claim 4, it is characterised in that: the laser emitter installs module
It is connect between the middle shell using detent.
10. a kind of laser dust sensor according to claim 1, it is characterised in that: the height of the shell be less than etc.
In 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820657305.3U CN208206735U (en) | 2018-05-04 | 2018-05-04 | A kind of laser dust sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820657305.3U CN208206735U (en) | 2018-05-04 | 2018-05-04 | A kind of laser dust sensor |
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| Publication Number | Publication Date |
|---|---|
| CN208206735U true CN208206735U (en) | 2018-12-07 |
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| CN201820657305.3U Active CN208206735U (en) | 2018-05-04 | 2018-05-04 | A kind of laser dust sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014280A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | On-line detection method of direct-reading dust concentration measuring instrument |
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2018
- 2018-05-04 CN CN201820657305.3U patent/CN208206735U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014280A (en) * | 2020-08-27 | 2020-12-01 | 苏州亿利安机电科技有限公司 | On-line detection method of direct-reading dust concentration measuring instrument |
| CN112014280B (en) * | 2020-08-27 | 2023-11-24 | 苏州亿利安机电科技有限公司 | On-line detection method of direct-reading dust concentration measuring instrument |
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