CN107314958A - A kind of band makes the laser dust apparatus for measuring concentration and method of device for mark by oneself - Google Patents
A kind of band makes the laser dust apparatus for measuring concentration and method of device for mark by oneself Download PDFInfo
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- CN107314958A CN107314958A CN201710409044.3A CN201710409044A CN107314958A CN 107314958 A CN107314958 A CN 107314958A CN 201710409044 A CN201710409044 A CN 201710409044A CN 107314958 A CN107314958 A CN 107314958A
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- 239000000428 dust Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title abstract description 5
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 239000013618 particulate matter Substances 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002156 adsorbate Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
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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
- G01N15/06—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
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- 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 the laser dust apparatus for measuring concentration that a kind of band makes device for mark by oneself, scattering optical receiver including laser, test chamber and in test chamber, device is transmitted present invention additionally comprises a light source, the laser is used to launch laser beam, and some or all of of laser beam is impinged upon on the receiving plane of scattering optical receiver by light source transmission device.Its specific method：A, calibrated first, the signal intensity E3 that receiver is received is stored as the benchmark light intensity calibrated later；B, after detection means uses a period of time, can timing or the opening guard mechanism of not timing sensor is demarcated, the signal intensity E4 that this when, receiver was received makes E4/E3=η；C, when starting measurement after guard mechanism reset, it is E5 that a diameter of D particulate matter, which passes through the luminous intensity that the scattered light produced during laser beam is received by the receiver,；Signal processing component assign E5/ η as the actual light intensity received when handling E5.The band of the present invention makes the laser dust apparatus for measuring concentration of device for mark by oneself, and accuracy of detection is high.
Description
Technical field
The invention belongs to auto parts machinery field, and in particular to a kind of band makes the laser dust apparatus for measuring concentration of device for mark by oneself
And method.
Background technology
Existing laser dust sensor in use, as equipment task time increases, in measured air
Comprising dust gradually in the outgoing mirror outer surface (refer to can directly be contacted with measured air the side) of laser tube and can make
To scatter the silicon light tube outer surface accumulation of optical receiver, the scattered light that the dust of accumulation can be received to shoot laser and reception pipe
Signal is produced and blocked so that the value of measurement shifts with actual value, thus can cause the deviation of measurement result, and due to surveying
Measure the significantly deviation of result and cause to be instructed by wrong data using the equipment of these measured values and do the action made mistake.
Existing laser dust sensor, mainly there is built-in laser, photoelectric receiving device, mini fan and signal transacting
Component is constituted, using light scattering principle, and the laser beam that laser is sent produces flowing through measurement cavity, mini fan work
Gas, when gas passes through the measurement cavity where laser beam, produces scattering on the particulate matter that laser is included in tested gas, dissipates
Penetrate light and electric signal is changed into by photoelectric receiving device, then PM2.5 mass according to specific algorithm is calculated by signal processing component
Concentration, PM10 mass concentrations, PM0.3~PM2.5 particulate matters number, PM2.5~Pm10 particulate matter numbers.
As illustrated in fig. 1 and 2, existing laser dust sensor, in use, due to the dust being tested in gas
Grain thing is inevitable that partial adsorbates or being deposited in the outgoing mirror outer surface of laser 1 (referring to can be straight with measured air
The side of contact) and as the surface outside the silicon light pipe of scattering optical receiver, due to the measurement chamber of laser dust sensor
Body be usually it is sealed, these absorption or precipitation particulate matters do not take apart measurement cavity when be can not clean (especially
When sensor is installed in air purifier or automobile).The dust of these absorption or precipitation can cause two problems：
1. laser emitting light is blocked by dust, exiting light beam intensity is caused to reduce；
2. scattered light is blocked by the dust of the silicon light pipe surface as receiver, the light signal strength of actual reception is caused to become
It is small.
Existing laser dust sensor be usually during production, laser and receiving device surface not by
During pollution, the output intensity E0 and receiver of the laser scattered light intensity received are demarcated, in subsequent use process
In, this initial value E0 can be used as the benchmark measured.For example, when not being contaminated on laser and receiving device surface, laser
Output intensity be E0, a diameter of D particulate matter passes through the luminous intensity that the scattered light produced during laser beam is received by the receiver
For E1；After laser and contaminated receiving device surface, a diameter of D particulate matter passes through the scattered light quilt produced during laser beam
The luminous intensity that receiver is received is E2, due to E2 ＜ E1, in the measurement result calculated using identical computational methods just
Can be more relatively low than actual value.As the growth of sensor use time, particulate matter are adsorbed or precipitate more and more, this deviation can be got over
Come bigger.
As measurement bug dust concentration or the laser dust sensor of particulate matter number, its precision to measurement is
Require, thus after laser dust sensor uses certain time, growth, particulate matter absorption or heavy with use time
Form sediment more and more, its deviation is increasing so that the result of measurement is nonsensical, or cause the electricity using these measurement results
Device does the motion made mistake by the data-guiding of mistake.
The content of the invention
(1) technical problem to be solved
The technical problem to be solved in the present invention is the whole precision during use of laser dust sensor to be improved.
(2) technical scheme
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of band makes the laser powder of device for mark by oneself
Dust concentration measurement apparatus, including laser, test chamber and the scattering optical receiver in test chamber, present invention additionally comprises
One light source transmits device, and the laser is used to launch laser beam, and some or all of of laser beam transmits device photograph by light source
On the receiving plane of scattering optical receiver.
Above-mentioned band is made by oneself in the laser dust apparatus for measuring concentration of device for mark, and the light source transmits device and is arranged on test chamber
The rear side of body.
Above-mentioned band is made by oneself in the laser dust apparatus for measuring concentration of device for mark, and the light source transmits the part or complete of device
Portion is arranged on the inner side of test chamber.
Above-mentioned band is made by oneself in the laser dust apparatus for measuring concentration of device for mark, and the structure that the light source transmits device is reflective
Mirror or refracting telescope.
Above-mentioned band is made by oneself in the laser dust apparatus for measuring concentration of device for mark, in addition to transmit device for blocking light source
Guard mechanism, laser beam by guard mechanism can not be sent to light source transmit device on.
Above-mentioned band is made by oneself in the laser dust apparatus for measuring concentration of device for mark, in addition to a movable platform, the work
Moving platform controls guard mechanism movement to transmit device to block light source.
Above-mentioned band is made by oneself in the laser dust apparatus for measuring concentration of device for mark, and the structure of the guard mechanism is one piece of gear
Plate.
A kind of band makes the laser dust measurement of concetration detection method of device for mark by oneself, comprises the steps of：
A, calibrated first, the signal intensity E3 that receiver is received is stored as the benchmark light intensity calibrated later；
B, after detection means uses a period of time, can timing or the opening guard mechanism of not timing sensor is entered
Rower is determined, and the signal intensity E4 that this when, receiver was received makes E4/E3=η；
C, when starting measurement after guard mechanism reset, a diameter of D particulate matter passes through the scattered light quilt produced during laser beam
The luminous intensity that receiver is received is E5；Signal processing component assign E5/ η as the actual light intensity received when handling E5.
(3) beneficial effect
The band of the present invention makes the laser dust apparatus for measuring concentration of device for mark by oneself, is used for the light source of the reflected beams by one
Device is transmitted, this light source transmits device and carries a baffle plate that can be removed, and can prevent light source from transmitting device when baffle plate is not removed
Surface is contaminated, baffle plate remove rear light source transmit device can with some or all receiving planes to receiver of the reflected beams,
The measuring basis of sensor is demarcated, so as to detect very benchmark.
Brief description of the drawings
Fig. 1 is the test philosophy block diagram of the laser dust sensor of prior art；
Fig. 2 is the structural representation of the laser dust sensor of prior art；
Fig. 3 makes the first embodiment figure of the laser dust apparatus for measuring concentration of device for mark by oneself for the band of the present invention；
Fig. 4 is the structural representation of light source transmission device and guard mechanism in Fig. 3；
Fig. 5 is Fig. 3 top view；
Fig. 6 makes the second embodiment figure of the laser dust apparatus for measuring concentration of device for mark by oneself for the band of the present invention；
In figure 1 be laser, 2 be test chamber, 3 be scattering optical receiver, 4 be light source transmit device, 5 be laser beam, 6 be
Guard mechanism, 8 be dust particle, 9 be receiving plane.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Embodiment one：As shown in Figure 3-Figure 5, a kind of band makes the laser dust apparatus for measuring concentration of device for mark by oneself, including swashs
Light device 1, light source transmit device 4, test chamber 2 and the scattering optical receiver 3 in test chamber 2, and the light source transmits device 4
It is arranged on the rear side of test chamber 2.Laser 1 is used to launch laser beam 5, and some or all of of laser beam 5 is passed by light source
Emitter 4 is impinged upon on the receiving plane 9 of scattering optical receiver 3.
The light source transmits some or all of inner side for being arranged on test chamber 2 of device 4.
Specifically, the structure that the light source transmits device 4 is reflective mirror or refracting telescope, or other light sources are propagated
Equipment.Speculum can use one group of speculum replacement, and speculum can also use one or one group of refraction optical element generation
Replace.As long as can reach makes some or all effects that can be impinged upon on the receiving plane of receiver of reflected light beam i.e.
Can.
Light source, which transmits device 4, can also use the component of other optical elements or several optical elements to replace.As long as can
Reach some or all effects that can be impinged upon on the receiving plane of receiver for the laser beam 5 for making to be reflected.
In order to dust-proof, present invention additionally comprises the guard mechanism 6 that device 4 is transmitted for blocking light source, laser beam is by blocking machine
Structure can not be sent to light source and transmit on device 4, and the concrete structure of the guard mechanism 6 is one piece of baffle plate, is automatically controlled for convenience
Baffle plate block light source transmit device 4, the present invention be provided be provided with a movable platform, the movable platform with electromagnetic drive either
Constituted with electrically driven (operated) motor etc., the instruction or external module that sensor built-in chip is sent are sent out by the signal wire of sensor
The instruction gone out is so that the mechanism action.
Said structure is comprised the steps of when movement is detected：
A, calibrated first, the signal intensity E3 that receiver is received is stored as the benchmark light intensity calibrated later；
B, after detection means uses a period of time, can timing or the opening guard mechanism of not timing sensor is entered
Rower is determined, and the signal intensity E4 that this when, receiver was received makes E4/E3=η；
C, when starting measurement, the scattering produced when a diameter of D dust particle 8 is by laser beam after guard mechanism reset
The luminous intensity that light is received by the receiver is E5；Signal processing component assign E5/ η as the actual light received when handling E5
By force.
Therefore it just correct for, due to the measured deviation that long-time is caused using dust precipitation, detecting very accurate.
Embodiment two：The present embodiment and the scheme of embodiment one are essentially identical, except that the light source transmits device 4
The some or all of inner side for being arranged on test chamber 2.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of band makes the laser dust apparatus for measuring concentration of device for mark by oneself, including laser (1), test chamber (2) and it is located at
Scattering optical receiver (3) in test chamber (2), it is characterised in that also transmit device (4), the laser including a light source
(1) it is used to launch laser beam (5), some or all of of laser beam (5) impinges upon scattering optical receiver by light source transmission device (4)
(3) on receiving plane.
2. band according to claim 1 makes the laser dust apparatus for measuring concentration of device for mark by oneself, it is characterised in that the light
Source transmits the rear side that device (4) is arranged on test chamber (2).
3. band according to claim 1 makes the laser dust apparatus for measuring concentration of device for mark by oneself, it is characterised in that the light
Source transmits some or all of inner side for being arranged on test chamber (2) of device (4).
4. the band according to claim any one of 1-3 makes the laser dust apparatus for measuring concentration of device for mark by oneself, its feature exists
In the structure that the light source transmits device (4) is reflective mirror or refracting telescope.
5. the band according to claim any one of 1-3 makes the laser dust apparatus for measuring concentration of device for mark by oneself, its feature exists
In, in addition to for blocking the guard mechanism (6) of light source transmission device (4), laser beam can not be sent to light source by guard mechanism
Transmit on device (4).
6. band according to claim 5 makes the laser dust apparatus for measuring concentration of device for mark by oneself, it is characterised in that also include
One movable platform, the movable platform control guard mechanism (6) is mobile to transmit device (4) to block light source.
7. band according to claim 1 makes the laser dust apparatus for measuring concentration of device for mark by oneself, it is characterised in that the screening
The structure of retaining device (6) is one piece of baffle plate.
8. band according to claim 5 makes the laser dust measurement of concetration detection method of device for mark by oneself, it is characterised in that bag
Containing following steps：
A, calibrated first, the signal intensity E3 that receiver is received is stored as the benchmark light intensity calibrated later；
B, after detection means uses a period of time, can timing or the opening guard mechanism of not timing rower is entered to sensor
Fixed, the signal intensity E4 that this when, receiver was received makes E4/E3=η；
C, when starting measurement after guard mechanism reset, a diameter of D particulate matter passes through the scattered light produced during laser beam and received
The luminous intensity that device is received is E5；Signal processing component assign E5/ η as the actual light intensity received when handling E5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409044.3A CN107314958B (en) | 2017-06-02 | 2017-06-02 | Laser dust concentration measuring device with self-calibration device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710409044.3A CN107314958B (en) | 2017-06-02 | 2017-06-02 | Laser dust concentration measuring device with self-calibration device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107314958A true CN107314958A (en) | 2017-11-03 |
| CN107314958B CN107314958B (en) | 2023-10-03 |
Family
ID=60181600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710409044.3A Active CN107314958B (en) | 2017-06-02 | 2017-06-02 | Laser dust concentration measuring device with self-calibration device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107314958B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108362616A (en) * | 2018-02-08 | 2018-08-03 | 芜湖美智空调设备有限公司 | Dust sensor and its calibration method, airhandling equipment |
| CN110082269A (en) * | 2019-04-28 | 2019-08-02 | 宁波爱立德汽车部件有限公司 | A kind of dust concentration and gas concentration lwevel detect measuring device |
| CN110243742A (en) * | 2019-07-29 | 2019-09-17 | 上海和璞电子技术有限公司 | A kind of device and method of engine air filter rear end powder concentration measurement |
| CN111220576A (en) * | 2020-01-17 | 2020-06-02 | 中煤科工集团重庆研究院有限公司 | Laser self-checking type dust concentration detection device and self-checking method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108362616A (en) * | 2018-02-08 | 2018-08-03 | 芜湖美智空调设备有限公司 | Dust sensor and its calibration method, airhandling equipment |
| CN110082269A (en) * | 2019-04-28 | 2019-08-02 | 宁波爱立德汽车部件有限公司 | A kind of dust concentration and gas concentration lwevel detect measuring device |
| CN110082269B (en) * | 2019-04-28 | 2024-05-31 | 宁波爱立德汽车部件有限公司 | Dust concentration and carbon dioxide concentration detection and measurement device |
| CN110243742A (en) * | 2019-07-29 | 2019-09-17 | 上海和璞电子技术有限公司 | A kind of device and method of engine air filter rear end powder concentration measurement |
| CN111220576A (en) * | 2020-01-17 | 2020-06-02 | 中煤科工集团重庆研究院有限公司 | Laser self-checking type dust concentration detection device and self-checking method thereof |
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| Publication number | Publication date |
|---|---|
| CN107314958B (en) | 2023-10-03 |
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