CN109357982B - Automatic calibrating device for dust meter - Google Patents
Automatic calibrating device for dust meter Download PDFInfo
- Publication number
- CN109357982B CN109357982B CN201811347220.6A CN201811347220A CN109357982B CN 109357982 B CN109357982 B CN 109357982B CN 201811347220 A CN201811347220 A CN 201811347220A CN 109357982 B CN109357982 B CN 109357982B
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- mirror
- dimming glass
- beam splitting
- splitting prism
- intelligent dimming
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- 239000000428 dust Substances 0.000 title claims abstract description 35
- 239000011521 glass Substances 0.000 claims abstract description 40
- 230000003287 optical effect Effects 0.000 claims abstract description 33
- 238000004088 simulation Methods 0.000 claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000002238 attenuated effect Effects 0.000 claims description 3
- 230000002999 depolarising effect Effects 0.000 claims description 3
- 239000004071 soot Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 13
- 230000010287 polarization Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/075—Investigating concentration of particle suspensions by optical means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N2015/0096—Investigating consistence of powders, dustability, dustiness
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an automatic calibrating device of a dust meter, which comprises a receiving probe, a calibrating unit, a direct standard light source, a beam splitting prism, first intelligent dimming glass and an optical trap, wherein the direct standard light source, the beam splitting prism, the first intelligent dimming glass and the optical trap are sequentially arranged from right to left; the first intelligent dimming glass is arranged on the main optical axis of the beam splitting prism; the calibration unit comprises a reflecting mirror and a simulation mirror, the reflecting mirror is arranged on the perpendicular line of the main optical axis of the beam splitting prism, and the simulation mirror is arranged on the right side of the reflecting mirror; the method realizes automatic calibration of dust by using intelligent dimming glass and a scattered light simulation lens; the scattering light is utilized to truly reflect the field condition, and the state of the intelligent dimming glass is changed to control the light source, so that the zero point and the measuring range of the instrument in any time period can be automatically calibrated. The receiving probe is arranged on the right side of the analog mirror and is used for receiving optical signals scattered by dust particles or optical signals emitted by the analog mirror.
Description
Technical Field
The invention relates to an automatic calibrating device for a dust meter.
Background
The dust meter is a device for detecting the dust content in a pollution source, the existing dust meter mostly adopts photoelectric detection equipment based on the beer Law, the principle is that detection light passes through the pollution source, when the detection light passes through the pollution source with dust, dust in the pollution source can cause the detection light to scatter, the detector receives the scattered light and analyzes the energy data of the scattered light, the less energy data corresponds to a unique dust content value, and the dust content value in the pollution source can be obtained through conversion. However, after a period of use, the light source emitting the detection light will attenuate to a certain extent, and after the light source changes, the energy of the detection light emitted by the light source will also correspondingly attenuate, which finally results in the scattered light energy received by the detector becoming smaller, and the dust content obtained by analysis is lower than the actual dust content.
In order to solve the problem, the existing dust content adopts to place the calibration block in the detection module to calibrate the dust meter, and the calibration process is as follows: firstly, evacuating a pollution source in a detection module, ensuring that no dust exists in the detection module, manually inserting a calibration block in the detection module, wherein the calibration block is a polished calibration lens, when detection light passes through the calibration block, the detection light is correspondingly scattered, a detector receives scattered light to obtain scattered light energy, the detector compares the scattered light energy generated by an initial light source with the scattered light energy generated by the light source during calibration to obtain the attenuation proportion of the light source, and the corresponding relation between the scattered light energy and the dust content in the pollution source is adjusted according to the change proportion of the twice scattered light energy, so that the calibration is completed.
However, the current calibration block adopts a motor driving mode to realize the conversion of the direction of the light source, so that the complexity of the system is increased, and meanwhile, a fault source is added; and debugging among the lenses is difficult, so that on-site maintenance is inconvenient.
Disclosure of Invention
The invention aims to provide an automatic calibrating device for a dust meter, which aims to solve the problems that the existing automatic calibrating device for the dust meter is complex in structure and inconvenient to debug on site.
In order to solve the technical problems, the invention provides an automatic calibrating device for a dust meter, which comprises a receiving probe, a calibrating unit, a direct light source, a beam splitter prism, first intelligent dimming glass and an optical trap, wherein the direct light source, the beam splitter prism, the first intelligent dimming glass and the optical trap are sequentially arranged from right to left;
the first intelligent dimming glass is arranged on the main optical axis of the beam splitting prism;
the calibration unit comprises a reflecting mirror and a simulation mirror, the reflecting mirror is arranged on the perpendicular line of the main optical axis of the beam splitting prism, and the simulation mirror is arranged on the right side of the reflecting mirror;
the receiving probe is arranged on the right side of the analog mirror and is used for receiving optical signals scattered by dust particles or optical signals emitted by the analog mirror.
Further, the beam splitting prism is a depolarizing beam splitting prism.
Further, the simulated mirror includes a second smart dimming glass and a scattering light-emitting lens bonded together.
Further, the inside of the optical trap is honeycomb-shaped, and the optical signal is attenuated after repeated refraction in the inside.
The beneficial effects of the invention are as follows: the method realizes automatic calibration of dust by using intelligent dimming glass and a scattered light simulation lens; the scattering light is utilized to truly reflect the field condition, and the state of the intelligent dimming glass is changed to control the light source, so that the zero point and the measuring range of the instrument in any time period can be automatically calibrated.
Drawings
The accompanying drawings, where like reference numerals refer to identical or similar parts throughout the several views and which are included to provide a further understanding of the present application, are included to illustrate and explain illustrative examples of the present application and do not constitute a limitation on the present application. In the drawings:
fig. 1 is a schematic diagram of the low concentration dust meter in an operating state.
Fig. 2 is a schematic diagram of the low concentration dust meter in a calibration state.
Wherein: 1. receiving a probe; 2. a simulated mirror; 3. a reflecting mirror; 4. a collimated light source; 5. a prism; 6. the first intelligent dimming glass; 7. dust particles; 8. an optical trap.
Detailed Description
The automatic calibrating device of the dust meter shown in fig. 1 and 2 comprises a receiving probe 1, a calibrating unit, a direct light source, a beam splitter prism 5, a first intelligent dimming glass 6 and an optical trap 8, wherein the direct light source, the beam splitter prism 5, the first intelligent dimming glass 6 and the optical trap 8 are sequentially arranged from right to left, and the first intelligent dimming glass 6 is arranged on a main optical axis of the beam splitter prism 5; the calibration unit comprises a reflecting mirror 3 and a simulation mirror 2, wherein the reflecting mirror 3 is arranged on the perpendicular line of the main optical axis of the beam-splitting prism 5, and the simulation mirror 2 is arranged on the right side of the reflecting mirror 3; the receiving probe 1 is arranged on the right side of the analog mirror 2 and is used for receiving the optical signals emitted by the dust particles 7 or the optical signals emitted by the analog mirror 2.
The intelligent dimming glass is formed by sandwiching a layer of liquid crystal film (commonly called dimming film) between two layers of glass, covering the liquid crystal film at the most center by a PVB film, and then placing the glass in an autoclave or a common one-step furnace for gluing through a high-temperature and high-pressure process. The user controls the transparent and opaque states of the glass by controlling the on-off state of the current. When the dimming glass is powered off, liquid crystal molecules in the electric control dimming glass can be in an irregular scattering state, and at the moment, the electric control glass is in a light-transmitting and opaque appearance state; when the dimming glass is electrified, liquid crystal molecules in the dimming glass are in regular arrangement, light can freely penetrate, and the dimming glass is in a transparent state instantly.
According to one embodiment of the present application, the beam-splitting prism 5 is a depolarizing beam-splitting prism 5. The depolarization beam splitter prism 5 is formed by plating a plurality of interference films on the inclined surface of the right angle prism 5, and then gluing the interference films into a cube structure, so that the P polarization component and the S polarization component of the incident light have similar beam splitting characteristics. The light is split by the beam splitter prism 5, so that the proportion relation of the original horizontal polarization and the original vertical polarization of the incident light can be kept as far as possible, the optical characteristic separation degree of the P light and the S light is less than 5%, the dispersion is low, and the color neutrality is good. According to one embodiment of the present application, the analog mirror 2 includes a second smart dimming glass and a scattering light-emitting lens that are bonded together.
According to one embodiment of the present application, the interior of the optical trap 8 is honeycomb-shaped, and the optical signal is attenuated after repeated refraction in the interior.
The working process of the application is as follows:
when the instrument is in operation, as shown in fig. 1. At this time, the first smart dimming glass 6 is in a transparent state, and light may penetrate the first smart dimming glass 6 to be irradiated into the environment with dust particles 7. When the dust particles 7 are irradiated, mie scattering can be generated, and the detector can finish detection of forward scattered light. The second smart dimming glass in the analog mirror 2 is in an opaque state at this time, and the reference light cannot penetrate, and is blocked on the right side of the analog mirror 2.
The instrument is in a calibrated state as shown in fig. 2. At this time, the first smart dimming glass 6 is in an opaque state, and light cannot penetrate the second smart dimming glass so as to be blocked at the right side thereof. The second intelligent dimming glass in the simulation mirror 2 is in a transparent state, the reference light split by the splitting prism 5 passes through the reflecting mirror 3 and then directly passes through the simulation mirror 2, the scattered light signal can be simulated by the scattered light simulation lens in the simulation mirror 2, the detector receives the energy of the scattered light simulated by the scattered light simulation lens, finally the attenuation ratio of the light source is obtained by comparing the scattered light energy generated by the initial light source with the scattered light energy generated by the light source during calibration through the detector (not shown in the figure), and the corresponding relation between the scattered light energy and the dust content in the pollution source is adjusted according to the change ratio of the twice scattered light energy, so that the accurate calibration of the system is completed.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (3)
1. The automatic calibrating device for the dust meter is characterized by comprising a receiving probe, a calibrating unit, a direct standard light source, a beam splitting prism, a first intelligent dimming glass and an optical trap, wherein the direct standard light source, the beam splitting prism, the first intelligent dimming glass and the optical trap are sequentially arranged from right to left;
the first intelligent dimming glass is arranged on the main optical axis of the beam splitting prism; the intelligent dimming glass is formed by sandwiching a liquid crystal film between two layers of glass, covering the liquid crystal film at the most center by a PVB film, and then gluing the glass through a high-temperature and high-pressure process; the user controls the transparent and opaque states of the glass by controlling the on-off state of the current;
the calibration unit comprises a reflecting mirror and a simulation mirror, the reflecting mirror is arranged on the perpendicular line of the main optical axis of the beam splitting prism, and the simulation mirror is arranged on the right side of the reflecting mirror; the simulation mirror comprises a second intelligent dimming glass and a scattering light simulation lens which are bonded together; the scattered light optical lens in the simulation mirror can simulate scattered light signals;
the receiving probe is arranged on the right side of the analog mirror and is used for receiving optical signals scattered by dust particles or optical signals emitted by the analog mirror.
2. The dust meter automatic calibration apparatus of claim 1, wherein the beam splitting prism is a depolarizing beam splitting prism.
3. The soot meter automatic calibration device of claim 1, wherein the interior of the optical trap is honeycomb-shaped and the optical signal is attenuated by repeated refraction in the interior thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347220.6A CN109357982B (en) | 2018-11-13 | 2018-11-13 | Automatic calibrating device for dust meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347220.6A CN109357982B (en) | 2018-11-13 | 2018-11-13 | Automatic calibrating device for dust meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109357982A CN109357982A (en) | 2019-02-19 |
| CN109357982B true CN109357982B (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811347220.6A Active CN109357982B (en) | 2018-11-13 | 2018-11-13 | Automatic calibrating device for dust meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110220828A (en) * | 2019-06-25 | 2019-09-10 | 北京雪迪龙科技股份有限公司 | A kind of particle monitoring instrument |
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| CN111153686A (en) * | 2020-01-14 | 2020-05-15 | 东莞市陶陶新材料科技有限公司 | Porous ceramic for electronic cigarette, atomizing core containing porous ceramic and preparation method of atomizing core |
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| CN114794570A (en) * | 2021-09-01 | 2022-07-29 | 深圳麦克韦尔科技有限公司 | Heating element, atomization component and electronic atomization device |
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