CN206609754U - Air particle concentration sensing detection light path - Google Patents
Air particle concentration sensing detection light path Download PDFInfo
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- CN206609754U CN206609754U CN201720107515.0U CN201720107515U CN206609754U CN 206609754 U CN206609754 U CN 206609754U CN 201720107515 U CN201720107515 U CN 201720107515U CN 206609754 U CN206609754 U CN 206609754U
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- light
- light path
- controller
- receiver
- beam expander
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- Investigating Or Analysing Biological Materials (AREA)
Abstract
The utility model is related to a kind of air particle concentration sensing detection light path, including housing, generating laser, receiver, variable connector, amplifying circuit, A/D change-over circuits, controller, display screen, also include beam expander, air flow channel, light-splitting device and filtering device, air flow channel is provided between the beam expander and light-splitting device and filtering device, the receiver is connected with variable connector, variable connector is connected to amplifying circuit, amplifying circuit is connected to A/D change-over circuits, the A/D change-over circuits are connected to controller, and controller is connected to display screen.The utility model is used as transmitting light source using laser, measurement accuracy is high, the particle of 0.5~0.2 micron diameter can be measured, the light intensity for the core that the photodetector being distributed with one heart by receiver two-layer equation star structure is received and the luminous flux of diffraction pattern, the number of Crape ring and width, the light intensity of Crape ring on focussing plane, light channel structure is compact, compact structure, good portability.
Description
Technical field
The utility model is related to sensor technical field, more particularly to a kind of air particle concentration sensing detection light
Road.
Background technology
The air quality in majority city is poor at present, and long-term breathing more than particulate in air content damages tight to human organ
Weight.The detection method of particulate matter mainly has sieve method, microscope method of testing, sedimentation, electric induction method and light scattering method.Wherein light
The scattering method testing time is short, and continuous measurement can be achieved, it is to avoid factor influence and the maintenance side such as climate change, humidity change
Just it is therefore applied widely.
Light in uniform dielectric by when by rectilinear direction propagate.But the total non-absolute uniform of real medium.Such as air
The middle fluctuating that there is gas density, and often contain micronic dust or fine droplet.And for example colloidal sol or suspension contain small consolidate
Body particle.When light beam is by this kind of inhomogeneous medium, in addition to the absorption that passes through and may occur, a part for incident light
The direction of propagation of its original can be deviateed, and project other directions, this phenomenon is referred to as the scattering of light.At the theory of scattering phenomenon
Reason it is very complicated, incoherent scattering refers to that grain spacing is sufficiently large in particle swarm, and particle is random distribution in space, they dissipate
Penetrating light will not offset because relevant, and the now scattering of each particle may be considered separate.Detect that air particle is dense
, it is necessary to which the particle diameter larger particles in air particle and the less granular zone of particle diameter are separated and counted respectively just when spending
Bulky grain thing concentration value and small particle concentration value can be accurately detected, rather than is provided solely for the larger concentration of error
Scope.Small particle and bulky grain thing are distinguished using heating or control air velocity method by most producers, make the biography of production
Sensor cost increase, volume is larger, power consumption increase.
The present invention is using laser as transmitting light source, and measurement accuracy is high, can measure the particle of 0.5~0.2 micron diameter.
The light intensity directly received using the big rule of little particle angle of scattering at receiver according to receiver core contrasts outer rim
The number of Crape ring annular section and its corresponding radius are distinguished little particle, middle particle and bulky grain and united respectively
Meter, it is not necessary to bulky grain and little particle are distinguished by heating or controlled wind speed, linear light path layout makes sensor
Structure is more compact.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of air particle concentration sensing detection light path, the
One, using laser as transmitting light source, measurement accuracy is high, can measure the particle of 0.5~0.2 micron diameter.Second, using small
The light intensity that the big rule of particle angle of scattering is directly received at receiver according to receiver core contrasts outer rim Crape ring ring
The number of shape part and its corresponding radius are distinguished little particle, middle particle and bulky grain and counted respectively, are not required to
Bulky grain and little particle are distinguished by heating or controlled wind speed, linear light path layout makes the structure of sensor smaller
Ingeniously.3rd, the light intensity of the core that the photodetector being distributed with one heart by receiver two-layer equation star structure is received with
And on focussing plane the luminous flux of diffraction pattern, the number of Crape ring and width, the light intensity of Crape ring, signal is after analog-to-digital conversion
Handled with controller, draw the size distribution of particle swarm.4th, light channel structure is compact, compact structure, good portability.
The utility model solves the technical scheme that its technical problem used：
Air particle concentration sensing detection light path, including housing, generating laser, receiver, variable connector, amplification electricity
Road, A/D change-over circuits, controller, display screen, it is characterised in that also including beam expander, air flow channel, light-splitting device and optical filtering
Device, the generating laser and receiver are arranged in housing, and the beam expander is arranged on the output light path of generating laser
On, the light-splitting device and filtering device are arranged on the input light path of receiver, the beam expander and light-splitting device and optical filtering
Air flow channel is provided between device, the receiver is connected with variable connector, variable connector is connected to amplifying circuit, amplification electricity
Road is connected to A/D change-over circuits, and the A/D change-over circuits are connected to controller, and controller is connected to display screen.
Further, the beam expander is using luminous exitance 0.02mrad, using optical coating glass lens or plastic cement
The laser parallel light pipe that lens are made is beam expander.
Further, the receiver is the photodetector that two-layer equation star structure is distributed with one heart, hub-and-spoke configuration distribution
Photodetector include central photodetector and peripheral annual distribution photodetector, peripheral annual distribution photodetector
It is even number to have the photodetector number in an at least circle, the often circle peripheral annual distribution photodetector.
Further, the hub-and-spoke configuration in the peripheral annual distribution photodetector close to central photodetector is distributed
The densely distributed degree of photodetector circle its photodetector be more than the light that the hub-and-spoke configuration away from central photodetector is distributed
The densely distributed degree of its photodetector of electric explorer circle.
Further, the light-splitting device and filtering device are Fourier's object lens and CCD imager, the CCD imager
For zooming into picture.
Further, the CCD imager is connected to controller by data wire, and controller is connected to display screen.
Further, the air flow channel vertical laser transmitter is set, and generating laser is on the air flow channel
The direction of light path extension is provided with laser entrance and laser exit.
Beneficial effect
As a result of above-mentioned technical scheme, the utility model compared with prior art, has the following advantages that and accumulated
Pole effect：
First, using laser as transmitting light source, measurement accuracy is high, can measure the particle of 0.5~0.2 micron diameter.
Second, the light intensity directly received using the big rule of little particle angle of scattering at receiver according to receiver core is contrasted
The number of outer rim Crape ring annular section and its corresponding radius are distinguished little particle, middle particle and bulky grain and carried out respectively
Statistics, it is not necessary to bulky grain and little particle are distinguished by heating or controlled wind speed, linear light path layout makes sensor
Structure it is more compact.3rd, the central part that the photodetector being distributed with one heart by receiver two-layer equation star structure is received
The light intensity and the luminous flux of diffraction pattern, the number of Crape ring and width, the light intensity of Crape ring on focussing plane divided, signal pass through
Handled after analog-to-digital conversion with controller, draw the size distribution of particle swarm.4th, light channel structure is compact, compact structure, portability
It is good.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is structured flowchart of the present utility model in another embodiment.
In figure：1- generating lasers；2- receivers；3- variable connectors；4- amplifying circuits；5-A/D change-over circuits；6- is controlled
Device processed；7- display screens；8- beam expanders；9- air flow channels；10- light-splitting devices, 11- filtering devices.
Embodiment
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation scope of the present utility model.In addition, it is to be understood that reading the content of the utility model instruction
Afterwards, those skilled in the art can make various changes or modifications to the utility model, and these equivalent form of values equally fall within this Shen
Please appended claims limited range.
Embodiment of the present utility model：
Referring to Fig. 1~Fig. 3, air particle concentration sensing detection light path, including it is housing, generating laser, receiver, many
Way switch, amplifying circuit, A/D change-over circuits, controller, display screen, it is characterised in that also including beam expander, air flow channel, divide
Optical device and filtering device, the generating laser and receiver are arranged in housing, and the beam expander is arranged on Laser emission
On the output light path of device, the light-splitting device and filtering device be arranged on receiver input light path on, the beam expander and point
Air flow channel is provided between optical device and filtering device, the receiver is connected with variable connector, variable connector, which is connected to, to be put
Big circuit, amplifying circuit is connected to A/D change-over circuits, and the A/D change-over circuits are connected to controller, and controller is connected to display
Screen.
As the presently preferred embodiments, the beam expander is using luminous exitance 0.02mrad, using optical coating glass lens
Or the laser parallel light pipe that plastic lens are made is beam expander.
As the presently preferred embodiments, the receiver is the photodetector that two-layer equation star structure is distributed with one heart, star-like knot
The photodetector of structure distribution includes central photodetector and peripheral annual distribution photodetector, peripheral annual distribution photoelectricity
Detector has the photodetector number in an at least circle, the often circle peripheral annual distribution photodetector to be even number.
As the presently preferred embodiments, the peripheral annual is distributed the star-like knot close to central photodetector in photodetector
The densely distributed degree of its photodetector of the photodetector circle of structure distribution is more than the hub-and-spoke configuration point away from central photodetector
The densely distributed degree of its photodetector of the photodetector circle of cloth.
As the presently preferred embodiments, the light-splitting device and filtering device are Fourier's object lens and CCD imager, the CCD
Imager is used to zoom into picture.
As the presently preferred embodiments, the CCD imager is connected to controller by data wire, and controller is connected to display
Screen.
As the presently preferred embodiments, the air flow channel vertical laser transmitter is set, and laser is on the air flow channel
The direction of transmitter light path extension is provided with laser entrance and laser exit.
Claims (5)
1. air particle concentration sensing detection light path, including housing, generating laser, receiver, variable connector, amplification electricity
Road, A/D change-over circuits, controller, display screen, it is characterised in that also including beam expander, air flow channel, light-splitting device and optical filtering
Device, the generating laser and receiver are arranged in housing, and the beam expander is arranged on the output light path of generating laser
On, the light-splitting device and filtering device are arranged on the input light path of receiver, the beam expander and light-splitting device and optical filtering
Air flow channel is provided between device, the receiver is connected with variable connector, variable connector is connected to amplifying circuit, amplification electricity
Road is connected to A/D change-over circuits, and the A/D change-over circuits are connected to controller, and controller is connected to display screen.
2. air particle concentration sensing detection light path according to claim 1, it is characterised in that the beam expander is used
The laser parallel light pipe that luminous exitance 0.02mrad, optical coating glass lens or plastic lens are made is beam expander.
3. air particle concentration sensing detection light path according to claim 2, it is characterised in that the light-splitting device and
Filtering device is Fourier's object lens and CCD imager, and the CCD imager is used to zoom into picture.
4. air particle concentration sensing detection light path according to claim 3, it is characterised in that the CCD imager
Controller is connected to by data wire, controller is connected to display screen.
5. air particle concentration sensing detection light path according to claim 4, it is characterised in that the air flow channel hangs down
Straight generating laser is set, and the direction extended on the air flow channel in generating laser light path is provided with laser entrance and swashed
Light exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720107515.0U CN206609754U (en) | 2017-02-04 | 2017-02-04 | Air particle concentration sensing detection light path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720107515.0U CN206609754U (en) | 2017-02-04 | 2017-02-04 | Air particle concentration sensing detection light path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206609754U true CN206609754U (en) | 2017-11-03 |
Family
ID=60169435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720107515.0U Expired - Fee Related CN206609754U (en) | 2017-02-04 | 2017-02-04 | Air particle concentration sensing detection light path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206609754U (en) |
-
2017
- 2017-02-04 CN CN201720107515.0U patent/CN206609754U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171103 Termination date: 20190204 |