CN109655386A - Particle concentration detection device and detection method - Google Patents
Particle concentration detection device and detection method Download PDFInfo
- Publication number
- CN109655386A CN109655386A CN201811420656.3A CN201811420656A CN109655386A CN 109655386 A CN109655386 A CN 109655386A CN 201811420656 A CN201811420656 A CN 201811420656A CN 109655386 A CN109655386 A CN 109655386A
- Authority
- CN
- China
- Prior art keywords
- light
- signal
- dust
- light probe
- probe
- 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.)
- Granted
Links
- 239000002245 particle Substances 0.000 title claims abstract description 42
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 239000000523 sample Substances 0.000 claims abstract description 56
- 239000000428 dust Substances 0.000 claims abstract description 54
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 5
- 230000028161 membrane depolarization Effects 0.000 claims description 4
- 230000011514 reflex Effects 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002356 laser light scattering Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing 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
- G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
-
- G01N15/075—
Abstract
The invention discloses a kind of particle concentration detection device and detection method, wherein the detection device include measuring unit, reference amending unit and with the controller that is connect respectively with the measuring unit and reference amending unit；Measuring unit includes the second light probe to the light source of candidate particles transmitting laser and for receiving the scattered light signal that dust particles to be measured scatter, and is sent to controller after scattered light signal is converted into dust concentration signal；Reference amending unit includes the first light probe and the optical splitter for light source to be divided into two optical paths is arranged；The wherein a branch of light emitting separated through optical splitter is sent to controller after being converted into reference electric signal after receiving by the first light probe to dust particles to be measured, another light beam；Controller is connect with the first light probe and the second light probe respectively, obtains dust particles concentration signal for receiving reference electric signal and dust concentration signal, and by the reference electric signal and dust concentration signal.
Description
Technical field
The present invention relates to a kind of particle concentration detection device and detection methods.
Background technique
With the rapid development of the national economy, in industrial many fields, such as coal-burning power plant, cement were producing
Flue dust can be all discharged in journey into atmosphere, thus environmental pollution is brought to become increasingly conspicuous, is caused to people's lives and health
Adverse effect.Therefore, the discharge of dust concentration is limited it is very urgent, and to dust carry out real-time monitoring be limitation
Discharge provides data supporting.Commercial measurement mainly uses laser scattering method at present, in industry spot using the side installed in situ
Formula measures, and since site environment is severe, certain influence can be brought to dust device, influences measurement accuracy.Low concentration is surveyed
It is especially apparent when amount, thus improves accuracy to become more important.
Such as public patent application number: 201510053394.1, this hair is described in Publication No. CN104596904A patent
It is bright to be related to a kind of powder concentration measurement method of laser dust sensor, at normal temperature, laser dust sensor is demarcated,
And record three indexs influential on dust measurement concentration when calibration: voltage value of the photoelectric sensor after first stage amplifier,
Using the comparing voltage value and rotation speed of the fan after a capacitance and a two-stage amplifier；To the decaying of light path devices,
The factors such as the variation of temperature and humidity are modified；Rotation speed of the fan in laser dust sensor is modified；To obtain laser
The real-time dust measurement concentration of dust sensor.The present invention by each factor influential on sensor dust measurement concentration according to
It is secondary to be modified compensation, substantially increase the accuracy of measurement of sensor.
The measurement method needs the influence factors such as the decaying to photoelectric sensor, light path devices, temperature and humidity to compare to repair
Just, the complexity of system is increased.Compensation result can just be obtained by needing to do a large number of experiments simultaneously, maintenance and related inspection to instrument
It tests and increases burden, be not easy to the operation of on-line instrument.
Summary of the invention
The object of the present invention is to provide a kind of particle concentration detection devices, to solve laser light scattering dust instrument worked
Cheng Zhong leads to asking for measurement error easily occur to the interference of measuring signal vulnerable to extraneous factors such as environment temperature, humidity, pressure
Topic.
In order to solve the above technical problems, the present invention provides a kind of particle concentration detection device, including measuring unit, reference
Amending unit and with the controller that is connect respectively with the measuring unit and reference amending unit.
The measuring unit includes to the light source of candidate particles transmitting laser and for receiving dust particles scattering to be measured
Second light probe of scattered light signal out, and the scattered light signal is converted into be sent to the control after dust concentration signal
Device processed.
The reference amending unit includes the first light probe and the light splitting for the light source to be divided into two optical paths is arranged
Device；The wherein a branch of light emitting separated through the optical splitter is received to dust particles to be measured, another light beam by the first light probe
After be converted into reference electric signal after be sent to the controller.
The controller is connect with first light probe and the second light probe respectively, for receiving the reference electric signal
With dust concentration signal, and dust particles concentration signal is obtained by the reference electric signal and dust concentration signal.
Further, the optical splitter is depolarization Amici prism, and the P polarisation separated emits to dust to be measured
Grain, S polarisation reflex to the first light probe by a reflecting mirror.
Further, the optical splitter and reflecting mirror are arranged in a transparent mirror case, and the same side of the mirror case is arranged
On wall, first light probe and the light source are arranged on another side wall opposite with optical splitter and reflecting mirror of mirror case.
Further, first light probe is arranged in one end of the first receiving barrel, the other end of the first receiving barrel meet to
In the optical path of the another light beam separated through the optical splitter.
Further, second light probe is arranged in one end of the second receiving barrel, the other end of the second receiving barrel meet to
In the optical path for the scattered light signal that dust particles to be measured scatter.
Further, the other end of second receiving barrel to described in the light source side be obliquely installed.
Further, the light source, the first receiving barrel and the second receiving barrel are each attached on a pedestal.
Further, the controller includes microcontroller, AD sampler, the power supply connecting respectively with the microcontroller
And output unit, first light probe and the second light probe are connect by inputting end member with AD sampler.
Furthermore the application also applies for a kind of method of particle concentration detection, comprising the following steps:
S1: the reference electric signal and dust concentration signal under standard conditions are obtained, and passes through the reference electric signal and powder
Interference coefficient is calculated in dust concentration signal；
S2: the real-time reference electric signal obtained according to the interference coefficient and practical work process is to the powder in the course of work
Dust concentration signal compensates to obtain practical dust concentration.
Further, the calculation formula of the interference coefficient K are as follows:
Wherein, R0For the reference electric signal that the first light probe at the standard conditions is got, S0It is at the standard conditions first
The dust concentration signal that light probe is got.
Further, the calculation formula of the practical dust concentration S are as follows:
S=S1-K*R1。
Wherein, R1The reference electric signal that the first light probe is got when for work measurement, S1It is got for the first light probe
Dust concentration signal.
System bring is done the invention has the benefit that the present invention eliminates environmental factor by using the method for reference
It disturbs, it is available to information such as power, the wavelength of light source by prism and reflecting mirror, then by comparing calculation, it is simple and efficient reality
The real-time compensation to outside environmental elements is showed.Furthermore in the present invention program, using modularized design, each module can independent work
Make, factory is facilitated to debug, while having the characteristics that on-site maintenance is convenient.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, at this
The same or similar part, the illustrative embodiments and their description of the application are indicated using identical reference label in a little attached drawings
For explaining the application, do not constitute an undue limitation on the present application.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of one embodiment of the invention.
Wherein: 1, controller；2, the first light probe；3, the first receiving barrel；4, collimated light source；5, mirror case；6, spectroscope；7,
Reflecting mirror；8, pedestal；9, the second receiving barrel；10, the second light probe.
Specific embodiment
Particle concentration detection device as shown in Figure 1, including measuring unit, reference amending unit and with respectively with institute
State the controller 1 that measuring unit is connected with reference amending unit；Each unit is described in detail separately below:
The measuring unit includes to the light source of candidate particles transmitting laser and for receiving dust particles scattering to be measured
Second light probe 10 of scattered light signal out, and the control is sent to after the scattered light signal is converted into measurement electric signal
Device 1 processed.Wherein, straight quasi-optical source can be used in light source, also, one end of the second receiving barrel 9 is arranged in second light probe 10,
The other end of second receiving barrel 9 is met in the optical path for the scattered light signal that dust particles to be measured scatter.In addition, described second connects
Receive cylinder 9 the other end can to described in the light source side be obliquely installed, the second light probe 10 can be made to be accurately received
To dust particles scattered signal.
The reference amending unit includes the first light probe 2 and the light splitting for the light source to be divided into two optical paths is arranged
Device；One end of the first receiving barrel 3 is arranged in first light probe 2, and the other end of the first receiving barrel 3 is met to through the optical splitter
In the optical path of the another light beam separated.Wherein, depolarization Amici prism can be used in the optical splitter, through the depolarization point
The wherein light beam (P polarisation) that light prism separates emits to dust particles to be measured, and another light beam (S polarisation) passes through the first light probe
The controller 1 is sent to after being converted into reference electric signal after 2 receptions.
The controller 1 is connect with first light probe 2 and the second light probe 10 respectively, for receiving the reference electricity
Signal and measurement electric signal, and dust particles concentration signal is obtained by the reference electric signal and measurement electric signal.Wherein, institute
Stating controller 1 includes microcontroller 1, and AD sampler, power supply and the output unit connecting respectively with the microcontroller 1 are described
First light probe 2 and the second light probe 10 are connect by inputting end member with AD sampler.
According to one embodiment of the application, the optical splitter and reflecting mirror 7 are arranged in a transparent mirror case 5, and are arranged
On the same side wall of the mirror case 5, first light probe 2 and the light source mirror case 5 is set with optical splitter and reflecting mirror
On 7 opposite another side walls.
The light source, the first receiving barrel 3 and the second receiving barrel 9 are each attached on a pedestal 8.By the way that light source, first are connect
It receives cylinder 3 and the second receiving barrel 9 is fixed on a pedestal 8.Pedestal 8 of the invention is compact-sized, so that all components are all pacified
On a component, the relative position of each receiving barrel ensure that, improve the stability of systematic survey.
The working principle of the application are as follows:
Collimated light source 4 launches beam of laser, which is placed on spectroscope 6 therein when through mirror case 5 and is divided into
Two-beam, wherein a branch of (P polarisation), along former direction directive dust particles to be detected, the first light probe 2 is for receiving powder to be measured
Received signal is simultaneously sent to controller 1 by scattered light signal that dirt particle scatters；In addition light beam (S polarisation) is then along vertical
Histogram is entered in the second receiving barrel 9 after being incident on reflecting mirror 7, is received by the second light probe 10 to injection, the second light probe 10
It is handled being transferred in controller 1 in the signal received.
Controller 1 drives collimated light source 4 using invariable power mode, and the signal for being responsible for the first light probe 2 and the second probe is adopted
Collection, quantization and calculating.Its calculation method is as follows:
One group of stable signal is acquired at the standard conditions, wherein the reference telecommunications labelled notation that the first light probe 2 is got
For R0, the amount electric signal that the first light probe 2 is got is labeled as S0.Interference coefficient is obtained by calculation:
In work measurement, the reference electric signal that the first light probe 2 is got is labeled as R1, the acquisition of the first light probe 2
The amount telecommunications labelled notation S arrived1, then compensated dust signal be
S=S1-K*R1。
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of particle concentration detection device, which is characterized in that including measuring unit, reference amending unit and with respectively with
The controller that the measuring unit is connected with reference amending unit；
The measuring unit includes scattering to the light source of candidate particles transmitting laser and for receiving dust particles to be measured
Second light probe of scattered light signal, and the scattered light signal is converted into be sent to the control after dust concentration signal
Device；
The reference amending unit includes the first light probe and the optical splitter for the light source to be divided into two optical paths is arranged；Through
Wherein a branch of light emitting that the optical splitter separates is converted after being received by the first light probe to dust particles to be measured, another light beam
At being sent to the controller after reference electric signal；
The controller is connect with first light probe and the second light probe respectively, for receiving the reference electric signal and powder
Dust concentration signal, and dust particles concentration signal is obtained by the reference electric signal and dust concentration signal.
2. particle concentration detection device according to claim 1, which is characterized in that the optical splitter is depolarization light splitting
Prism, the P polarisation separated emit to dust particles to be measured, and S polarisation reflexes to the first light probe by a reflecting mirror.
3. particle concentration detection device according to claim 1 or 2, which is characterized in that the optical splitter and reflecting mirror
It is arranged in a transparent mirror case, and is arranged on the same side wall of the mirror case, first light probe and light source setting exists
On another side wall opposite with optical splitter and reflecting mirror of mirror case.
4. particle concentration detection device according to claim 3, which is characterized in that first light probe setting is the
One end of one receiving barrel, the other end of the first receiving barrel are met in the optical path of the another light beam separated through the optical splitter.
5. particle concentration detection device according to claim 4, which is characterized in that second light probe setting is the
One end of two receiving barrels, the other end of the second receiving barrel are met in the optical path for the scattered light signal that dust particles to be measured scatter.
6. particle concentration detection device according to claim 5, which is characterized in that second receiving barrel it is described another
One end to described in the light source side be obliquely installed.
7. particle concentration detection device according to claim 1, which is characterized in that the controller includes microcontroller
Device, AD sampler, power supply and the output unit being connect respectively with the microcontroller, first light probe and the second light probe
It is connect by input end member with AD sampler.
8. a kind of side for carrying out particle concentration detection using particle concentration detection device as claimed in claim 1 to 7
Method, comprising the following steps:
S1: the reference electric signal and dust concentration signal under standard conditions are obtained, and dense by the reference electric signal and dust
Interference coefficient is calculated in degree signal；
S2: the real-time reference electric signal obtained according to the interference coefficient and practical work process is dense to the dust in the course of work
Degree signal compensates to obtain practical dust concentration.
9. particle concentration detection method according to claim 8, which is characterized in that the calculating of the interference coefficient K is public
Formula are as follows:
Wherein, R0For the reference electric signal that the first light probe at the standard conditions is got, S0For the spy of the first light at the standard conditions
The dust concentration signal that head is got.
10. particle concentration detection method according to claim 8, which is characterized in that the meter of the practical dust concentration S
Calculate formula are as follows:
S=S1-K*R1。
Wherein, R1The reference electric signal that the first light probe is got when for work measurement, S1The dust got for the first light probe
Concentration signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420656.3A CN109655386B (en) | 2018-11-26 | 2018-11-26 | Particulate matter concentration detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811420656.3A CN109655386B (en) | 2018-11-26 | 2018-11-26 | Particulate matter concentration detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109655386A true CN109655386A (en) | 2019-04-19 |
| CN109655386B CN109655386B (en) | 2024-04-02 |
Family
ID=66111833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811420656.3A Active CN109655386B (en) | 2018-11-26 | 2018-11-26 | Particulate matter concentration detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109655386B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146423A (en) * | 2019-06-13 | 2019-08-20 | 厦门华厦学院 | Fine particle concentration detection device |
| CN112326561A (en) * | 2020-10-28 | 2021-02-05 | 歌尔股份有限公司 | Ellipsometer, test method and device thereof, and computer storage medium |
| CN114324095A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Monitoring device for concentration of particle impurities in gas pipeline |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908623A (en) * | 2005-08-02 | 2007-02-07 | 德菲电气（北京）有限公司 | Multi-component infrared online gas analyzer |
| CN101008604A (en) * | 2007-01-26 | 2007-08-01 | 中北大学 | On-line testing method for aerosol particles concentration and size and testing device thereof |
| US20080004842A1 (en) * | 2003-09-23 | 2008-01-03 | Arjen Amelink | Method and device for backscatter spectroscopy |
| CN201096703Y (en) * | 2007-09-27 | 2008-08-06 | 上海理工大学 | Grain granularity, concentration and density measuring device |
| CN102353634A (en) * | 2011-06-15 | 2012-02-15 | 西安毅达信息系统有限公司 | Online calibration method of laser online detection system for direction of gas contents in smoke |
| CN104777080A (en) * | 2015-04-10 | 2015-07-15 | 中国石油大学(北京) | Online detecting device and method for granules and liquid drops in gas pipelines |
| CN106769721A (en) * | 2016-11-15 | 2017-05-31 | 东南大学 | A kind of particulate pollutant concentration light scattering measurement device and measuring method |
| CN210037540U (en) * | 2018-11-26 | 2020-02-07 | 重庆川仪分析仪器有限公司 | Particulate matter concentration detection device |
| US20210123847A1 (en) * | 2018-09-05 | 2021-04-29 | Cubic Sensor and Instrument Co.,Ltd | Method and Device for Simultaneously Measuring Mass Concentrations of Particulates with Different Sizes |
-
2018
- 2018-11-26 CN CN201811420656.3A patent/CN109655386B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080004842A1 (en) * | 2003-09-23 | 2008-01-03 | Arjen Amelink | Method and device for backscatter spectroscopy |
| CN1908623A (en) * | 2005-08-02 | 2007-02-07 | 德菲电气（北京）有限公司 | Multi-component infrared online gas analyzer |
| CN101008604A (en) * | 2007-01-26 | 2007-08-01 | 中北大学 | On-line testing method for aerosol particles concentration and size and testing device thereof |
| CN201096703Y (en) * | 2007-09-27 | 2008-08-06 | 上海理工大学 | Grain granularity, concentration and density measuring device |
| CN102353634A (en) * | 2011-06-15 | 2012-02-15 | 西安毅达信息系统有限公司 | Online calibration method of laser online detection system for direction of gas contents in smoke |
| CN104777080A (en) * | 2015-04-10 | 2015-07-15 | 中国石油大学(北京) | Online detecting device and method for granules and liquid drops in gas pipelines |
| CN106769721A (en) * | 2016-11-15 | 2017-05-31 | 东南大学 | A kind of particulate pollutant concentration light scattering measurement device and measuring method |
| US20210123847A1 (en) * | 2018-09-05 | 2021-04-29 | Cubic Sensor and Instrument Co.,Ltd | Method and Device for Simultaneously Measuring Mass Concentrations of Particulates with Different Sizes |
| CN210037540U (en) * | 2018-11-26 | 2020-02-07 | 重庆川仪分析仪器有限公司 | Particulate matter concentration detection device |
Non-Patent Citations (3)
| Title |
|---|
| FRINGES STEFAN: "in situ contrast calibration to determine the height of individual diffusing nanoparticles in a tunable confinement", JOURNAL OF APPLIED PHUSICS, vol. 119, no. 2, 14 January 2016 (2016-01-14) * |
| 张勇: "基于塞曼原子吸收法的燃煤电厂贡排放检测研究", 激光与光电子学进展, vol. 1, no. 2017, 9 May 2017 (2017-05-09), pages 56 - 64 * |
| 杨胜强: "矿井粉尘防治", vol. 1, 中国矿业大学出版社, pages: 46 - 50 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146423A (en) * | 2019-06-13 | 2019-08-20 | 厦门华厦学院 | Fine particle concentration detection device |
| CN112326561A (en) * | 2020-10-28 | 2021-02-05 | 歌尔股份有限公司 | Ellipsometer, test method and device thereof, and computer storage medium |
| CN114324095A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Monitoring device for concentration of particle impurities in gas pipeline |
| CN114324095B (en) * | 2021-12-30 | 2023-10-24 | 中国石油大学(北京) | Monitoring device for particle impurity concentration in gas pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109655386B (en) | 2024-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109655386A (en) | Particle concentration detection device and detection method | |
| CN103712914B (en) | Detection aerosol extinction and the laser cavity ring-down spectrometer of scattering coefficient simultaneously | |
| CN101706307B (en) | Transmission spectra based method and device for detecting oil product interfaces in oil pipelines | |
| CN104637234B (en) | Smoke detector certification device and calibration method based on laser light scattering measurement principle | |
| CN102506724A (en) | Two-dimension displacement measuring system utilizing collimating laser and method utilizing same to measure guide rails | |
| CN204556499U (en) | The multi-channel high-speed data acquisition and processing system of tuning diode absorption spectrum | |
| CN102539397B (en) | Correction of the fluorescent spectrum method and fluorescence spectrum measuring apparatus | |
| KR20190083531A (en) | Particulate matters concentration calibration apparatus | |
| CN103994954A (en) | Low-cost high-precision haze measuring instrument | |
| CN204375103U (en) | Based on the smoke detector calibrating installation of laser defusing measure principle | |
| CN204461354U (en) | A kind of range finder using laser system for testing optical axis | |
| CN102323044A (en) | Motor vehicle headlamp luminous intensity distribution property self-adaption detection method based on camera method | |
| CN103149353A (en) | Quantitative detection system and detection method for multi-channel test paper disc | |
| CN202709996U (en) | Device capable of measuring film thickness accurately | |
| CN106768351B (en) | Infrared detector single mode changeable responsiveness test macro and method | |
| CN106248543B (en) | A kind of dust sensor performance parameter detection method | |
| CN206848240U (en) | A kind of stationary source VOC on-line monitoring systems | |
| CN210037540U (en) | Particulate matter concentration detection device | |
| CN203745361U (en) | Laser cavity ring-down spectrometer capable of simultaneously detecting aerosol extinction and scattering coefficient | |
| CN208505573U (en) | A kind of LED magnitude tracing light parameter and standard aging monitoring device | |
| CN201716252U (en) | LED dust detection transmitter | |
| CN2676186Y (en) | Granular laser particle size distribution tester | |
| CN206945525U8 (en) | A kind of spectral transmittance detecting instrument | |
| CN2606351Y (en) | Continuous smoke concentration determining laser emitter | |
| CN1506669A (en) | Glass stree optical test device |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No.61, middle section of Huangshan Avenue, gaoxinyuan, new North District, Chongqing Applicant after: CHONGQING CHUANYI ANALYZER Co.,Ltd. Address before: 400700 No. 1, people's village, Beibei District, Chongqing Applicant before: CHONGQING CHUANYI ANALYZER Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |