CN110036278B - Measuring device and method for measuring motes for motor vehicles - Google Patents
Measuring device and method for measuring motes for motor vehicles Download PDFInfo
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- CN110036278B CN110036278B CN201780076868.1A CN201780076868A CN110036278B CN 110036278 B CN110036278 B CN 110036278B CN 201780076868 A CN201780076868 A CN 201780076868A CN 110036278 B CN110036278 B CN 110036278B
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- 238000000034 method Methods 0.000 title claims abstract description 5
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 22
- 238000002360 preparation method Methods 0.000 claims 2
- 239000000428 dust Substances 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 40
- 239000012080 ambient air Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- 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
- G01N15/02—Investigating particle size or size distribution
- G01N15/0205—Investigating particle size or size distribution by optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/4785—Standardising light scatter apparatus; Standards therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/51—Scattering, i.e. diffuse reflection within a body or fluid inside a container, e.g. in an ampoule
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- General Health & Medical Sciences (AREA)
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- Immunology (AREA)
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- Dispersion Chemistry (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a measuring device for measuring dust particles for a motor vehicle, comprising at least one laser light source, at least one lens associated with the laser light source, at least one calibration device associated with the laser light source, at least one measuring chamber, and at least one optical receiving device. The invention further relates to a method for measuring fine dust in a motor vehicle having a measuring device according to the invention.
Description
Technical Field
The invention relates to a measuring device for measuring fine dust for a motor vehicle, comprising at least one laser light source, at least one lens associated with the laser light source, at least one calibration device associated with the laser light source, and at least one measuring chamber.
Background
Measuring devices for measuring fine dust are frequently used in the automotive field. By means of the measuring device, it is possible, for example, to check the ambient air of the motor vehicle for the presence of dust particles. In this case, optical measurement methods are mostly used, in which the air volume to be examined is irradiated in a measurement chamber with laser light and the change in the laser beam is detected by means of an optical receiving device. In these devices, it is disadvantageous that a laser light source, a lens body and a calibration device for the laser light source have to be provided for each measuring cell. In particular, the use of multiple lasers in multiple measurement spaces makes the production of the measuring device costly.
Disclosure of Invention
The object on which the invention is based is to propose a measuring device of the type mentioned at the outset, in which a cost-effective production is achieved.
The object of the invention is achieved by a measuring device having the features of claim 1. Advantageous embodiments and developments are specified in the dependent claims.
In a measuring device for measuring dust particles for a motor vehicle, having at least one laser light source, at least one lens associated with the laser light source, at least one calibration device associated with the laser light source, at least one measuring chamber and at least one optical receiver, it is essential according to the invention that the measuring device has at least two measuring chambers, at least two measuring chambers are associated with at least one laser light source and each measuring chamber has at least one optical receiver for detecting laser light.
By using two measuring chambers, different air volumes, for example the air volume of the ambient air of the motor vehicle and the air volume of the interior air of the motor vehicle, can be checked in parallel. This makes it possible, for example, to determine whether an air exchange between the interior of the motor vehicle and the surroundings is relevant. In this case, a laser light source is assigned to the two measuring chambers, which laser light source irradiates the two measuring chambers with laser light for the purpose of inspection. The air volume located in the two measuring chambers can be checked in parallel by irradiating the two measuring chambers with the laser light of only one laser light source, without the need for two laser light sources. In order to detect the laser light after it has passed through the respective air volume to be examined, each measuring chamber has an optical receiving device for detecting the laser light.
In one embodiment of the invention, the measuring device has exactly two measuring chambers, the measuring device has at least one mirror body, which is associated with the two measuring chambers, the mirror body has two mirror surfaces, which are arranged facing away from one another, the mirror surfaces are open at an angle, the mirror surfaces together form an edge, and the beam path of the laser light emitted by the laser light source is directed at the edge. In order to split the laser light of the laser light source, the measuring device has a mirror body with two reflection surfaces. In this case, the mirror bodies are preferably designed in such a way that the two mirror bodies are arranged facing away from each other and each have at least one straight edge. Preferably, the two mirror surfaces meet at a corner formed by straight edges of the mirror surfaces. The two mirror surfaces of the mirror body are arranged at an angle and are opened at an angle. The light path of the laser emitted by the laser source is aligned with the edge of the mirror body. The emitted laser light is thus scattered in two directions, so that it is available for inspection in two measuring chambers.
In one embodiment of the invention, the mirror surfaces are angled by 90 °, the mirror surfaces being directed outward. The mirror surfaces of the mirror body can be arranged such that they are at right angles to one another. The mirror body with the two mirror surfaces thus forms a right-angled edge, the mirror surfaces being directed outward. The laser beam can be directed at this edge, so that the laser beam is scattered in two spatial directions. The mirror is arranged between the two measuring chambers and the laser beam can be scattered into the two measuring chambers by the leading edge of the mirror, so that parallel measurements can be carried out in the two measuring chambers with one laser source. Each mirror can be assigned a lens body, so that the laser beam can correspondingly expand onto the measuring chamber.
In one embodiment of the invention, the measuring chambers are arranged next to one another, the mirrors are arranged between the measuring chambers, each measuring chamber is assigned a mirror, and the beam path of the laser light extends at least partially between the two measuring chambers.
The two measurement chambers can be arranged side by side, wherein the mirror is arranged between the two measurement chambers. Preferably, in this case, the mirror surfaces of the mirror body are arranged in such a way that they each face a measurement chamber. The edge formed by the two mirrors is arranged facing the laser beam, i.e. the laser light source. Preferably, the laser beam or the beam axis of the laser beam is at an angle of 135 ° to the mirror. The laser beam is incident on the edge of the mirror body and the mirror surface, and sub-beams of the laser beam are scattered into the two measuring chambers respectively through the opening angle between the laser beam and the mirror surface. The beam path of the laser beam can be arranged between the two measuring chambers until the laser beam impinges on the mirror body and diverges therefrom into the two measuring chambers. This results in a compact construction of the measuring device. In the beam path of the laser light source, a measuring unit into which the air volume to be examined is introduced and an optical receiver for detecting the laser beam influenced by the air volume are arranged in each case. Furthermore, a lens body is associated with the two mirrors, which lens body serves to focus or expand the respective partial beam onto the air volume to be examined.
In one embodiment of the invention, the measuring device has two mirrors, each having a mirror surface, each mirror surface having at least one straight edge, and the mirror surfaces abutting each other at the at least one straight edge. The mirror bodies can be designed as mirror disks and each have at least one straight edge. The mirror bodies can abut against one another at this straight edge and are therefore arranged at an angle, the mirror surfaces pointing outwards. The laser beam can be scattered into the two measuring chambers by forming the edges.
In an alternative embodiment of the invention, the measuring chambers are arranged side by side, the laser light source with the laser exit opening is arranged facing the measuring chambers, both measuring chambers have at least one entrance opening for the laser light to enter, the measuring chamber facing the laser light source has an exit opening, and the light path is guided through both measuring chambers. In this embodiment of the invention, the two measurement chambers are arranged side by side, the laser of the laser source being guided through both chambers in sequence. In this case, both measuring chambers have an entrance opening through which the laser light can enter the measuring chamber. Furthermore, the measuring chamber facing the laser source additionally has an outlet opening. The arrangement of the measuring chambers next to one another thus enables the laser beam to be injected into the first measuring chamber and the laser beam to be injected from the first measuring chamber and into the second measuring chamber. For this purpose, the injection openings of the two measuring chambers and the injection openings of the measuring chambers associated with the laser light source are arranged in such a way that the opening planes intersect. It is thus possible to check two measuring chambers, i.e. two air volumes to be checked, with a laser light source.
In one embodiment of the invention, the exit opening of the measuring chamber facing the laser light source and the entry opening of the measuring chamber facing away from the laser light source intersect at least partially. The laser beam can be caused to pass through the two measuring chambers by the intersection of the entry openings of the two measuring chambers and the exit openings of the measuring chambers associated with the laser light source. Two air volumes can thus be checked in two measuring chambers arranged side by side.
In one embodiment of the invention, at least one receiving device is arranged in at least one measuring chamber perpendicularly to the beam axis of the laser, at least one beam splitting device is arranged in the at least one measuring chamber, and the beam splitting device is assigned to the at least one receiving device. In order to check the air volume in the two measuring chambers, the measuring chambers are arranged side by side. The laser beam first penetrates a first air volume to be examined in a measuring chamber facing the laser light source and then penetrates into the second measuring chamber, in which a second air volume is examined. For the purpose of the examination, the laser beam is injected into a measuring chamber facing the laser light source and is incident on a beam splitter arranged in the beam path. The laser beam is split by the beam splitter, wherein one sub-beam is guided further into the second measuring chamber following the beam axis of the input beam and the other sub-beam is deflected preferably at right angles to the beam axis of the input beam. The deflected laser beam is deflected by a first air volume to be examined. An optical receiver is arranged in the beam path of the deflected laser beam behind the first air volume to be examined, by means of which a change in the laser beam passing through the air volume can be examined. The undeflected beamlets are able to penetrate into the second measurement chamber. In this case, the second air volume to be examined can be arranged in the beam axis of the incoming laser beam, and correspondingly an optical receiving device can be arranged behind the air volume in the beam path of the laser beam. It can also be provided that a beam splitter or a beam deflection device (e.g. a mirror) can also be arranged in the second measuring chamber, which deflects the laser beam at right angles to the incident laser beam. The second air volume to be examined and the optical receiving device can be arranged correspondingly in the deflected laser beam.
In one embodiment of the invention, the measuring chambers each have at least one receiving device, and each receiving device is assigned a laser attenuation device. The optical receivers can each be assigned a laser attenuator (for example, in the form of a semiconductor diode, in particular, in the form of a photodiode, or the like). In particular, the laser attenuation device is arranged in the beam path of the respective laser beam behind the receiving device. The laser attenuation device can be formed, for example, by a concave mirror or also by a plurality of concave mirrors, on which the laser beam is incident and whose intensity is attenuated by multiple reflections until the laser beam is no longer scattered back into the measurement chamber. This prevents the measurement from being disturbed by an uncontrolled reflected or scattered laser beam. Preferably, a laser attenuation device is associated with each receiving device.
In addition, the invention also relates to a method for measuring fine dust in a motor vehicle having a measuring device according to the invention, wherein an air volume to be examined is introduced into at least one measuring chamber, wherein the air volume is irradiated with laser light of at least one laser light source, and wherein the laser light is detected after having passed through the air volume to be examined, it is proposed, in a significant manner, for the invention that the measurement is carried out in at least two measuring chambers in parallel, the measurement being carried out with laser light of the same laser light source. For the parallel measurement of two air volumes, for example the ambient air volume and the interior air volume of the motor vehicle, the air volumes can be introduced into the respective measurement chambers. By assigning the laser light sources to two measuring chambers and by arranging a detection device, in particular an optical detection device, in each measuring chamber, the air volume can be checked simultaneously. For this purpose, the light of the laser light source is guided through the two chambers or scattered by at least one mirror in such a way that the laser light is incident into the two measuring chambers. The air volume introduced into the measuring chamber is irradiated with the laser light, and the laser light is detected by an optical receiving device after passing through the air volume. Evaluating the measurement results of the optical receiving device.
Drawings
In the following, the invention is further elucidated on the basis of an embodiment shown in the drawing. Showing in detail:
FIG. 1: a measuring device having two measuring chambers arranged side by side;
FIG. 2: a measuring device having two beam splitters;
FIG. 3: a measuring device with two measuring chambers and a mirror body.
Detailed Description
Fig. 1 shows a measuring device 1 with a laser light source 2 and measuring chambers 3, 4. The laser light source 2 is arranged in such a manner as to face the measurement chamber 3. The measuring chamber 3 has an entrance opening 5 for the laser beam to enter and an exit opening 6 for the laser beam to exit. The measuring chamber 4, which is arranged facing away from the laser light source 2, has an entrance opening 7 through which the laser beam that has passed through the measuring chamber 3 can enter the measuring chamber 4. At the entry openings 5 and 7, lens bodies 8, 9 are arranged, which serve to focus or expand the laser beam onto the air volume 10, 11 to be examined. The measuring chambers 3, 4 have receiving means 12, 13 for evaluating the laser beam guided through the air volumes 10, 11. The receiving devices 12, 13 are assigned laser attenuation devices 14, 15, which can be embodied, for example, by concave mirrors and can be used to prevent the laser beam from being reflected back into the respective measuring chamber 3, 4 after it has been incident on the receiving devices 12, 13. The laser light source 2 is associated with a calibration device 16. By the arrangement of the measurement chambers 3, 4 next to one another and by the intersection of the entry openings 5, 7 and the exit opening 6, a laser beam can be emitted from the laser light source 2 into the measurement chambers 3, 4. The laser beam is injected into the measuring chamber 3 through the lens body 8 at the injection opening 5 and passes through a beam splitting device 17, by means of which the laser beam is split into two sub-beams. The partial beams continue along the beam axis of the incident laser beam through the entry opening 7 into the measuring chamber 4. The beamlets are deflected at right angles and pass through the air volume 10 until the beamlets are incident on the receiving means 12. The undeflected laser beam passes through the air volume 11 and is deflected onto the receiving device 13. With this arrangement, the two air volumes 10, 11 can be examined in parallel with the laser light source 2.
Fig. 2 shows the measuring device according to fig. 1 with two receiving devices 14, 15, which are arranged at right angles to the beam path of the laser light incident from the laser light source 2. The laser light can be detected by the receiving devices 14, 15 by scattering in the air volumes 10, 11 in the measuring chambers 3, 4.
Fig. 3 shows another embodiment of the present invention. The measuring chambers 3, 4 are arranged next to one another, wherein the beam path of the laser beam of the laser light source 2 extends at least partially between the measuring chambers 3, 4. Between the measuring chambers 3, 4, mirror bodies 18, 19 with mirror surfaces 20, 21 are arranged. The mirror surfaces 20, 21 are open at right angles. The laser beam of the laser light source 2 is focused onto an edge 22, which is formed by the mirrors 20, 21. By arranging the mirrors 20, 21, the laser beam is guided into the measuring chambers 3, 4. In the measuring chambers 3, 4, in the beam path of the laser beam, air volumes 10, 11 to be examined are arranged, as well as optical receiving devices 12, 13 and laser attenuation devices 14, 15. Furthermore, a calibration device 16 is associated with the laser light source 2. By arranging the mirrors 18, 19 and by arranging the measurement chambers 3, 4 side by side, the air volumes 10, 11 can be examined in parallel using only the laser light source 2. In addition to focusing the laser beam on the edge 22 formed between the mirrors 20, 21, the laser beam can be expanded in such a way that the mirrors 20, 21 can preferably be completely irradiated and thus a larger air volume 10, 11 can be examined.
All features mentioned in the foregoing description and in the claims can be combined in any selected manner with the features of the independent claims. The disclosure of the present invention is therefore not limited to the described or claimed combinations of features, but rather all combinations of features that are significant in the framework of the invention can be regarded as being disclosed.
Claims (8)
1. Measuring device (1) for mote measurement for a motor vehicle, comprising at least one laser light source (2), at least one lens body (8) associated with the laser light source (2), at least one calibration device (16) associated with the laser light source (2), at least one measuring chamber (3, 4) and at least one optical receiving device (12, 13),
it is characterized in that the preparation method is characterized in that,
the measuring device (1) has at least two measuring chambers (3, 4),
at least one laser light source (2) is associated with at least two measuring chambers (3, 4), and
each measuring chamber (3, 4) having at least one optical receiving device (12, 13) for detecting laser light,
wherein the measuring chambers are arranged side by side, a laser light source (2) with a laser exit opening is arranged facing the measuring chamber (3), both measuring chambers (3, 4) have at least one entry opening (5, 7) for the laser light to enter, the measuring chamber (3) facing the laser light source has an exit opening, and the light path is guided through both measuring chambers (3, 4),
wherein the outlet opening (6) of the measuring chamber (3) facing the laser light source (2) and the inlet opening (5, 7) of the measuring chamber (4) facing away from the laser light source (2) intersect at least partially.
2. Measuring device according to claim 1, characterized in that the measuring device (1) has exactly two measuring chambers (3, 4), in that the measuring device (1) has at least one mirror body which is assigned to the two measuring chambers (3, 4) and which has at least two mirror surfaces (20, 21), in that the mirror surfaces (20, 21) are arranged facing away from one another, in that the mirror surfaces (20, 21) are open at an angle, in that the mirror surfaces (20, 21) together form an edge (22), and in that the beam path of the laser light emitted by the laser light source is directed at the edge (22).
3. A measuring device as claimed in claim 2, characterized in that the mirror surfaces (20, 21) are open at an angle of 90 °, wherein the mirror surfaces (20, 21) are directed outwards.
4. Measuring device according to claim 2, characterized in that the measuring chambers (3, 4) are arranged next to one another, the mirror is arranged between the measuring chambers (3, 4), a mirror (20, 21) is associated with each measuring chamber (3, 4), and the beam path of the laser light extends at least partially between the two measuring chambers (3, 4).
5. Measuring device according to claim 1, characterized in that the measuring device (1) has two mirrors (18, 19), the mirrors (18, 19) each having a mirror surface (20, 21), each mirror surface (20, 21) having at least one straight edge, and the mirror surfaces abutting each other at the at least one straight edge.
6. Measuring device according to claim 1, characterized in that the at least one receiving device (12, 13) is arranged in the respective at least one measuring chamber (3, 4) perpendicularly to the beam axis of the laser light, in that at least one beam splitting device (17) is arranged in the at least one measuring chamber (3, 4), and in that the beam splitting device (17) is assigned to the at least one receiving device (12, 13).
7. Measuring device according to claim 1, characterized in that the measuring chambers (3, 4) each have at least one receiving device (12, 13) and in that a laser attenuation device (15) is associated with each receiving device (12, 13).
8. Method for measuring motes in a motor vehicle having a measuring device according to one of claims 1 to 7, wherein an air volume to be examined is introduced into at least one measuring chamber (3, 4), wherein the air volume (10, 11) is irradiated with laser light of at least one laser light source (2), and wherein the laser light is detected after passing through the air volume to be examined (10, 11),
it is characterized in that the preparation method is characterized in that,
the measurements are performed in at least two measurement chambers (3, 4) in parallel and are performed with the laser of the same laser light source (2).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016124068.0 | 2016-12-12 | ||
| DE102016124068.0A DE102016124068A1 (en) | 2016-12-12 | 2016-12-12 | Measuring device and method for fine dust measurement for a motor vehicle |
| PCT/EP2017/081613 WO2018108650A1 (en) | 2016-12-12 | 2017-12-06 | Measuring device and method for fine dust measuring for a motor vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110036278A CN110036278A (en) | 2019-07-19 |
| CN110036278B true CN110036278B (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780076868.1A Active CN110036278B (en) | 2016-12-12 | 2017-12-06 | Measuring device and method for measuring motes for motor vehicles |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110036278B (en) |
| DE (1) | DE102016124068A1 (en) |
| WO (1) | WO2018108650A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10776643B1 (en) * | 2019-08-28 | 2020-09-15 | Robert Bosch Gmbh | Vehicular airborne particulate matter detection system |
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| CN203287312U (en) * | 2013-04-16 | 2013-11-13 | 比亚迪股份有限公司 | Vehicle and PM2.5 particle detection device component thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110036278A (en) | 2019-07-19 |
| DE102016124068A1 (en) | 2018-06-14 |
| WO2018108650A1 (en) | 2018-06-21 |
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