CN107314961A - A kind of bare headed dust detection method of bidifly and sensor - Google Patents
A kind of bare headed dust detection method of bidifly and sensor Download PDFInfo
- Publication number
- CN107314961A CN107314961A CN201710706719.0A CN201710706719A CN107314961A CN 107314961 A CN107314961 A CN 107314961A CN 201710706719 A CN201710706719 A CN 201710706719A CN 107314961 A CN107314961 A CN 107314961A
- Authority
- CN
- China
- Prior art keywords
- laser
- bidifly
- bare headed
- detection zone
- laser head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 82
- 239000000428 dust Substances 0.000 title claims abstract description 51
- 238000012937 correction Methods 0.000 claims description 12
- 238000009825 accumulation Methods 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000000149 argon plasma sintering Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000011514 reflex Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 230000006872 improvement Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 4
- 230000005923 long-lasting effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000011378 penetrating method Methods 0.000 description 1
- 230000009467 reduction Effects 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
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 a kind of bare headed dust detection method of bidifly, to the air launch laser of same detection zone by the way of two laser head rotations, it is incident upon the laser that dust scatters to catch by photelectric receiver, the laser through detection zone passes through reflective surface to other directions in addition to detection zone.The invention also discloses a kind of bare headed dust detection sensor of bidifly, the box body of corresponding laser head and photelectric receiver including being internally provided with, the quantity of laser head is two, and the quantity of photelectric receiver is one, detection zone is provided with box body, photelectric receiver is located at detection zone side；Provided with the circuit board being connected with laser head and photelectric receiver in box body, reflecting surface is additionally provided with.The bare headed dust detection method of bidifly and sensor that the present invention is provided, allow two laser head rotations to use, the service life of laser head combination can reach that the life-span greatly improves 30,000 to 40,000 hours.
Description
Technical field
The present invention relates to dust concentration testing equipment field, more particularly to a kind of bare headed dust detection method of bidifly and sensing
Device.
Background technology
At present, the detection to dust in air concentration (such as PM2.5) is realized by dust detector, and dust is detected
Sensor is the critical piece in dust detector.One-to-one laser head and opto-electronic receiver are provided with dust detection sensor
Dust in air mass concentration is detected using light scattering method in device, the Laser emission end of laser head towards photelectric receiver.However,
Laser head is limited by itself 26S Proteasome Structure and Function, it is necessary to which the energy exported greatly, especially under conditions of continuous work is needed, causes
The service life of laser head is shorter, and the life-span typically between 5,000 to 10,000 hours, needs the laser head renewed after damage, using into
This is higher.
The content of the invention
It is an object of the invention to provide a kind of bare headed dust detection method of bidifly and sensor, pass through the wheel of two laser heads
Change and use, both guaranteed persistently to detect bug dust concentration, be avoided that laser head long lasting for work, laser head again
The service life of combination can reach that the life-span greatly improves 30,000 to 40,000 hours.
To achieve the above object, the present invention provides a kind of bidifly bare headed dust detection method, detects empty using light scattering method
In gas during bug dust concentration, to the air launch laser of same detection zone by the way of two laser head rotations, laser is penetrated
Scattered on dust into the detection zone, the laser of scattering is caught by the photelectric receiver positioned at detection zone side,
Laser through detection zone passes through reflective surface to other directions in addition to detection zone.
As a further improvement on the present invention, the angle between described two laser head Laser emission directions is 30-45 °.
As the further improvement of the present invention, one of them described laser head running hours length accumulation reaches that 4-24 is small
Shi Hou, switches to another laser head and proceeds work, described two laser heads are connected in control circuit, control circuit and set
There is the clock unit that two laser heads can be controlled to work switching time.
As the further improvement of the present invention, the step of carrying out output accuracy correction using bidifly shaven head.
It is as the further improvement of the present invention, the step of the accuracy correction：In same period and region, open respectively
Different laser heads are opened, the data that photelectric receiver is exported are contrasted, it is larger less to data value by data value
It is corrected.
To achieve the above object, the present invention also provides a kind of bidifly bare headed dust detection sensor, including box body, the box body
Corresponding laser head and photelectric receiver is inside provided with, the quantity of the laser head is two, the number of the photelectric receiver
Measure as one, box body, which is provided with air inlet and exhaust outlet, box body to be provided with, to be located between the air inlet and exhaust outlet and with two
The detection zone of person's connection, photelectric receiver is located at detection zone side；It is provided with what is be connected with laser head and photelectric receiver in box body
Circuit board, be additionally provided with for by through the laser reflection of detection zone in addition to detection zone other directions reflecting surface.
As the further improvement of the present invention, the angle between described two laser head Laser emission directions is 30-
45°。
As the further improvement of the present invention, in the box body provided with two ends respectively with the air inlet and exhaust outlet
Air flow lumen, the air flow lumen extends along " U-shaped " curve, and the detection zone is located at the middle part of air flow lumen, described
Two laser heads are located between air inlet and exhaust outlet.
The fixed mount for being used for installing the laser head is provided with as the further improvement of the present invention, in the box body, should
Fixed mount includes groove of the lateral direction penetrating in the middle part of it, and the groove is the detection zone, and fixed mount also includes being located at groove side
Two laser head installation portions, the quantity of the reflecting surface is two and is respectively positioned on the opposite side of fixed mount upper groove, reflecting surface
Light barrier is provided between groove.
As the further improvement of the present invention, fixed mount is connected with each other with the circuit board by attachment structure.
Beneficial effect
Compared with prior art, the bare headed dust detection method of bidifly of the invention and the advantage of sensor are：
1st, two laser heads use alternating mode, and any moment most only one of which laser heads are launched to photelectric receiver to swash
Light, had both guaranteed persistently to detect bug dust concentration, single laser head was avoided that again long lasting for work, two are swashed
The service life of shaven head combination can reach that the life-span greatly improves 30,000 to 40,000 hours；Laser through detection zone is anti-by reflecting surface
It is incident upon other directions in addition to detection zone, it is to avoid reduce the degree of accuracy of detection because the laser of reflection reenters detection zone；
2nd, the angle between two laser head Laser emission directions is 30-45 °, will not mutually be done when both launch laser
Disturb；
3rd, accumulation operating time reaches that 4-24 hours laggard road wheels are changed, it is to avoid frequent switching expends unnecessary energy；
4th, the clock unit in control circuit can automatically control the switching time of two laser head work, without artificial behaviour
Make, control is more accurate, and the working time of two laser heads is average, make both service lifes as close possible to reduction is because wherein
One laser head service life is too short and influences the probability in whole equipment life-span；
5th, when convention dust detection sensor only uses a laser head, laser head is with the increase of use time, its laser
Intensity is more and more lower, and the scattered light for causing photelectric receiver to be received under conditions of identical dust concentration is fewer and fewer, signal
Also just weaken therewith, cause testing result inaccurate；And the step of progress output accuracy correction bare headed using bidifly, it is possible to resolve because
The problem of testing result is inaccurate caused by single laser head laser intensity weakens；
6th, two laser heads and photelectric receiver are arranged in box body, and integrated level is high, and convenient use passes through circuit board control
Two laser head rotation works are made, Automated condtrol is realized；
7th, air flow lumen extends along " U-shaped " curve, facilitates two laser heads to be arranged between air inlet and exhaust outlet, saves
The inner space of box body is saved, the miniaturization of the bare headed dust detection sensor of bidifly can be realized；
8th, fixed mount is used to conveniently take out when installing laser head, maintenance or replacing；
9th, fixed mount and circuit board are connected with each other by attachment structure, and both can be simultaneously into and out box body, circuit board
It can be connected between laser head, photelectric receiver using shorter electric wire, save material, wiring is convenient.
By following description and with reference to accompanying drawing, the present invention will become more fully apparent, and these accompanying drawings are used to explain the present invention
Embodiment.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of angle between two laser head Laser emission directions；
Fig. 2 is the schematic perspective view of the bare headed dust detection sensor of bidifly；
Fig. 3 is the front view of the bare headed dust detection sensor of bidifly；
Fig. 4 is the rearview of the bare headed dust detection sensor of bidifly；
Fig. 5 is the upward view of the bare headed dust detection sensor of bidifly；
Fig. 6 is the explosive view of the bare headed dust detection sensor of bidifly；
Fig. 7 bows to sectional view for lower house；
Fig. 8 is the schematic perspective view of fixed mount；
Fig. 9 is the top view of fixed mount；
Figure 10 is the front view of fixed mount；
The upward view of Figure 11 fixed mounts.
Embodiment
Embodiments of the invention are described with reference now to accompanying drawing.
Embodiment
As shown in Figure 1 to 11, a kind of bare headed dust detection method of bidifly is dissipated the embodiment of the present invention using light
When penetrating method detection dust in air mass concentration, to the air launch of same detection zone by the way of two rotations of laser head 4
Scattered on laser, the dust that laser is incident upon in the detection zone, the laser of scattering passes through the photoelectricity positioned at detection zone side
Receiver 8 is caught, and the laser through detection zone reflexes to other directions in addition to detection zone by reflecting surface 7.
As shown in figure 1, the angle between two Laser emission directions of laser head 1 is α, α scope is 30-45 °.
Two laser heads use alternating mode, and any moment most only one of which laser heads are launched to photelectric receiver to swash
Light, had both guaranteed persistently to detect bug dust concentration, single laser head was avoided that again long lasting for work, two are swashed
The service life of shaven head combination can reach that the life-span greatly improves 30,000 to 40,000 hours；Between two laser head Laser emission directions
Angle be 30-45 °, will not be interfered when both launch laser.
One of them the described running hours length of laser head 1 accumulation was reached after 4-24 hours, switched to another laser head 1
Proceed work.
Described two laser heads 1, which are connected in control circuit, control circuit to be provided with, can control two work switchings of laser heads 1
The clock unit on opportunity.
When convention dust detection sensor only uses a laser head, laser head is with the increase of use time, and its laser is strong
Degree is more and more lower, and the scattered light for causing photelectric receiver to be received under conditions of identical dust concentration is fewer and fewer, signal
Just weaken therewith, cause testing result inaccurate.
And the bare headed dust detection method of bidifly in the present invention also carries out output accuracy correction using bidifly shaven head
Step, it can solve above-mentioned the problem of testing result is inaccurate caused by single laser head laser intensity weakens.
The step of accuracy correction is：In same period and region, different laser heads 4 are separately turned on, photoelectricity is connect
Receive the data that device 8 exports to be contrasted, less to data value be corrected by the way that data value is larger.Numerical value is larger, says
The bright laser intensity of corresponding laser head 4 decay is less, and its numerical value passes through the less carry out school of its logarithm value closer to actual value
Just, the accuracy rate of testing result is higher.
In the present embodiment, when carrying out accuracy correction step, each laser head 4 is switched over after opening 5 seconds.
The step of accuracy correction, can be not only used for correction of dispatching from the factory, it can also be used to operating real time correction, can so prolong
The bare headed dust detection sensor of long bidifly carries out the time of high precision test.Accuracy correction step is controlled by software, when
The laser intensity that one of laser head 4 is sent is too low, and when the signal for producing photelectric receiver 8 is very weak, software is disabled automatically
The laser head 4.
The above method is realized by a kind of bare headed dust detection sensor of bidifly, including box body 1, is provided with the box body 1
Corresponding laser head 4 and photelectric receiver 8, the quantity of the laser head 4 is two, and the quantity of the photelectric receiver 8 is
One, box body 1 is provided with air inlet 2 and exhaust outlet 3, be provided with box body 1 be located between the air inlet 2 and exhaust outlet 3 and with
The detection zone of both connections, photelectric receiver 8 is located at detection zone side；It is provided with and laser head 4 and photelectric receiver 8 in box body 1
The circuit board 6 of connection, be additionally provided with for by through the laser reflection of detection zone in addition to detection zone other directions reflecting surface
7。
In the present embodiment, photelectric receiver 8 is located at the infall side of two laser heads, 4 liang of beam laser.Photelectric receiver 8
It is arranged between reflecting surface 7 and laser head 4.
Angle between two Laser emission directions of laser head 1 is 30-45 °.
In the present embodiment, box body 1 includes the first housing 11 and the second housing 12 mutually fastened.The bottom of second housing 12 is set
There is the receiver installation portion 14 for installing photelectric receiver 8.
The air flow lumen 13 of two ends respectively with the air inlet 2 and exhaust outlet 3, the air are provided with the box body 1
Flow cavity 13 extends along " U-shaped " curve, and the detection zone is located at the middle part of air flow lumen 13, and described two laser heads 1 are located at
Between air inlet 2 and exhaust outlet 3.In the present embodiment, air flow lumen 13 is arranged on the second housing 12.
The fixed mount 5 for being used for installing the laser head 4 is provided with the box body 1, the fixed mount 5 includes lateral direction penetrating wherein
The groove 52 in portion, the groove 52 is the detection zone, and two laser heads that fixed mount 5 also includes positioned at the side of groove 52 are installed
Portion 51, the quantity of the reflecting surface 7 is two and is respectively positioned on the opposite side of the upper groove 52 of fixed mount 5, each reflecting surface 7 and groove
Light barrier 55 is equipped between 52, the fraction of laser light after reflected face 7 is reflected is blocked by light barrier 55, will not reenter detection
Area, further ensures that the degree of accuracy of detection.
In the present embodiment, reflecting surface 7 is plane, and its normal is in angle with the laser that laser head 4 is sent.
Fixed mount 5 is connected with each other with the circuit board 6 by attachment structure.In the present embodiment, attachment structure includes setting
An inserting column 54 and two tops on fixed mount 5 are equipped with the inserted sheet 53 of Access Division, and inserting column 54 and inserted sheet 53 are arranged at
The same side of fixed mount 5.Attachment structure also includes two the first sockets 62 and second socket being arranged on circuit board 6
63, the first socket 62 is adapted with inserted sheet 53, and the second socket 63 is adapted with inserting column 54.
Circuit board 6, which is provided with, is exposed to connection jaws 61 beyond box body 1, for being connected with external equipment to transmit detection number
According to.
In above-described embodiment, the position adjacent with the photelectric receiver 8 is also provided with supplying on the wall body of box body 1
The cleaning mouthful that burnisher is stretched into, it is convenient that photelectric receiver surface is cleaned, it is ensured that the accuracy of detection；Cleaning is finished
Afterwards, cleaning mouth is blocked using plug, it is to avoid reduce Detection results because non-detection air enters in box body from cleaning mouth.
Above in association with most preferred embodiment, invention has been described, but the invention is not limited in implementation disclosed above
Example, and modification, equivalent combinations that the various essence according to the present invention are carried out should be covered.
Claims (10)
1. the bare headed dust detection method of a kind of bidifly, it is characterised in that detect dust in air mass concentration using light scattering method
When, to the air launch laser of same detection zone by the way of two laser head (4) rotations, laser is incident upon in the detection zone
Dust on scatter, the laser of scattering is caught by the photelectric receiver (8) positioned at detection zone side, through detection zone
Laser reflexes to other directions in addition to detection zone by reflecting surface (7).
2. a kind of bare headed dust detection method of bidifly according to claim 1, it is characterised in that described two laser heads
(4) angle between Laser emission direction is 30-45 °.
3. a kind of bare headed dust detection method of bidifly according to claim 1, it is characterised in that one of them described laser
Head (4) running hours length accumulation was reached after 4-24 hours, is switched to another laser head (4) and is proceeded work, described two
Individual laser head (4) is connected in control circuit, control circuit and is provided with the clock that two laser heads (4) can be controlled to work switching time
Unit.
4. the bare headed dust detection method of a kind of bidifly according to claim 1, it is characterised in that using bidifly shaven head
The step of carrying out output accuracy correction.
5. a kind of bare headed dust detection method of bidifly according to claim 4, it is characterised in that the step of the accuracy correction
Suddenly it is：In same period and region, different laser heads (4) are separately turned on, the data progress pair that photelectric receiver (8) is exported
Than less to data value being corrected by the way that data value is larger.
6. it is provided with corresponding laser head in a kind of bare headed dust detection sensor of bidifly, including box body (1), the box body (1)
(4) and photelectric receiver (8), it is characterised in that the quantity of the laser head (4) is two, the number of the photelectric receiver (8)
Measure as one, box body (1) is provided with air inlet (2) and exhaust outlet (3), box body (1) and is provided with positioned at the air inlet (2) and row
The detection zone connected between gas port (3) and with both, photelectric receiver (8) is located at detection zone side；It is provided with box body (1) with swashing
Bare headed (4) and the circuit board (6) of photelectric receiver (8) connection, is additionally provided with for by through the laser reflection of detection zone to except inspection
Survey the reflecting surface (7) in other directions beyond area.
7. a kind of bare headed dust detection sensor of bidifly according to claim 6, it is characterised in that described two laser heads
(4) angle between Laser emission direction is 30-45 °.
8. the bare headed dust detection sensor of a kind of bidifly according to claim 6, it is characterised in that in the box body (1)
Air flow lumen (13) provided with two ends respectively with the air inlet (2) and exhaust outlet (3), air flow lumen (13) edge " U
Shape " curve extends, and the detection zone is located at the middle part of air flow lumen (13), and described two laser heads (4) are located at air inlet (2)
Between exhaust outlet (3).
9. a kind of bare headed dust detection sensor of bidifly according to claim 6 or 7 or 8, it is characterised in that the box body
(1) being provided with is used to installing the fixed mounts (5) of the laser head (4), and the fixed mount (5) includes groove of the lateral direction penetrating in the middle part of it
(52), the groove (52) is the detection zone, and two laser heads that fixed mount (5) also includes positioned at groove (52) side are installed
Portion (51), the quantity of the reflecting surface (7) is two and is respectively positioned on the opposite side of fixed mount (5) upper groove (52), reflecting surface (7)
Light barrier (55) is provided between groove (52).
10. the bare headed dust detection sensor of a kind of bidifly according to claim 9, it is characterised in that fixed mount (5) and institute
Circuit board (6) is stated to be connected with each other by attachment structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706719.0A CN107314961A (en) | 2017-08-17 | 2017-08-17 | A kind of bare headed dust detection method of bidifly and sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706719.0A CN107314961A (en) | 2017-08-17 | 2017-08-17 | A kind of bare headed dust detection method of bidifly and sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107314961A true CN107314961A (en) | 2017-11-03 |
Family
ID=60176161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710706719.0A Pending CN107314961A (en) | 2017-08-17 | 2017-08-17 | A kind of bare headed dust detection method of bidifly and sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107314961A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655387A (en) * | 2018-12-20 | 2019-04-19 | 温州佳旭建设监理咨询有限公司 | A kind of monitoring device of powder-like waste at construction supervision scene |
| CN110566998A (en) * | 2018-06-05 | 2019-12-13 | 青岛海尔智能技术研发有限公司 | Laser ignition device, gas water heater and ignition debugging method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366495A (en) * | 2013-07-11 | 2013-10-23 | 合肥工业大学 | Air-breathing high-sensitivity smoke particle detector and application thereof |
| CN104655539A (en) * | 2015-03-20 | 2015-05-27 | 安费诺(常州)连接系统有限公司 | Dual-channel dust concentration sensor and dust concentration detection method thereof |
| CN105784552A (en) * | 2014-12-24 | 2016-07-20 | 周志斌 | Particle concentration sensor and particle concentration detection method |
| CN205941280U (en) * | 2016-06-22 | 2017-02-08 | 淮南润成科技股份有限公司 | Measure dust concentration's optical devices |
| CN106796207A (en) * | 2014-08-28 | 2017-05-31 | 皇家飞利浦有限公司 | Sensing system and method for sensing |
| CN206362673U (en) * | 2016-12-16 | 2017-07-28 | 煤科集团沈阳研究院有限公司 | Mining dual-wavelength laser sensor of dust concentration |
| CN107036949A (en) * | 2017-05-19 | 2017-08-11 | 武汉四方光电科技有限公司 | Dust concentration detection means and provided with dust concentration detection means air cleaning facility |
| CN207007655U (en) * | 2017-08-17 | 2018-02-13 | 广州市汇鑫电子科技有限公司 | A kind of bidifly shaven head dust detection sensor |
-
2017
- 2017-08-17 CN CN201710706719.0A patent/CN107314961A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103366495A (en) * | 2013-07-11 | 2013-10-23 | 合肥工业大学 | Air-breathing high-sensitivity smoke particle detector and application thereof |
| CN106796207A (en) * | 2014-08-28 | 2017-05-31 | 皇家飞利浦有限公司 | Sensing system and method for sensing |
| CN105784552A (en) * | 2014-12-24 | 2016-07-20 | 周志斌 | Particle concentration sensor and particle concentration detection method |
| CN104655539A (en) * | 2015-03-20 | 2015-05-27 | 安费诺(常州)连接系统有限公司 | Dual-channel dust concentration sensor and dust concentration detection method thereof |
| CN205941280U (en) * | 2016-06-22 | 2017-02-08 | 淮南润成科技股份有限公司 | Measure dust concentration's optical devices |
| CN206362673U (en) * | 2016-12-16 | 2017-07-28 | 煤科集团沈阳研究院有限公司 | Mining dual-wavelength laser sensor of dust concentration |
| CN107036949A (en) * | 2017-05-19 | 2017-08-11 | 武汉四方光电科技有限公司 | Dust concentration detection means and provided with dust concentration detection means air cleaning facility |
| CN207007655U (en) * | 2017-08-17 | 2018-02-13 | 广州市汇鑫电子科技有限公司 | A kind of bidifly shaven head dust detection sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566998A (en) * | 2018-06-05 | 2019-12-13 | 青岛海尔智能技术研发有限公司 | Laser ignition device, gas water heater and ignition debugging method |
| CN110566998B (en) * | 2018-06-05 | 2022-01-25 | 青岛海尔智能技术研发有限公司 | Laser ignition device, gas water heater and ignition debugging method |
| CN109655387A (en) * | 2018-12-20 | 2019-04-19 | 温州佳旭建设监理咨询有限公司 | A kind of monitoring device of powder-like waste at construction supervision scene |
| CN109655387B (en) * | 2018-12-20 | 2021-07-20 | 温州佳旭建设监理咨询有限公司 | A dust monitoring devices for in building supervision scene |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0815449A (en) | Rain drop sensor and rain-drop measuring device using the sensor as well as wiper driving device using the measuring device | |
| EP3589940B1 (en) | Optical soiling measurement device for photovoltaic arrays | |
| CN102928386B (en) | Turbidity sensor and water body turbidity on-line detection method | |
| CN107314961A (en) | A kind of bare headed dust detection method of bidifly and sensor | |
| CN104950352B (en) | Optical rainfall detection method, detection device and light guide | |
| CN107478557B (en) | Detection device of dust concentration detector | |
| CN101561517A (en) | Non-contact type detector and detecting method of liquid in pipe | |
| JP5678719B2 (en) | Photodetector | |
| CN104374743A (en) | Turbidity sensor and turbidity measurement device | |
| AU2010307970A1 (en) | Optical fluid tester | |
| CN207007655U (en) | A kind of bidifly shaven head dust detection sensor | |
| CN106908412A (en) | Miniaturization laser methane sensing probe | |
| CN201425571Y (en) | Device for measuring dust concentration | |
| CN204679665U (en) | Optics rainfall detecting device and lightguide | |
| AU648513B2 (en) | Sensing moisture on screen and automated controlled wiping | |
| CN109877109B (en) | Optical glass window self-cleaning air knife control system and device for remote measurement and remote sensing | |
| WO2018007786A1 (en) | Turbidity sensor and method for measuring turbidity | |
| CN217766850U (en) | Background suppression type laser sensor | |
| JPS59106348A (en) | Automatic wiper control device | |
| CN203587495U (en) | Raindrop Sensing Device | |
| CN206675518U (en) | A kind of heart rate sensor detection means | |
| KR20100081094A (en) | Multi-functional rain sensor with prism | |
| CN203705051U (en) | Light source system and gas analyzer | |
| CN218474127U (en) | Electronic cigarette | |
| CN205860997U (en) | A kind of vision inspection apparatus of the sensor circuit board for automobile assisted power steering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |