CN111060431B - Airborne passive air intake special pollution real-time rapid monitoring system - Google Patents
Airborne passive air intake special pollution real-time rapid monitoring system Download PDFInfo
- Publication number
- CN111060431B CN111060431B CN202010020862.6A CN202010020862A CN111060431B CN 111060431 B CN111060431 B CN 111060431B CN 202010020862 A CN202010020862 A CN 202010020862A CN 111060431 B CN111060431 B CN 111060431B
- Authority
- CN
- China
- Prior art keywords
- monitoring
- pipeline
- control valve
- monitoring instrument
- particle monitor
- 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.)
- Expired - Fee Related
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 92
- 239000002245 particle Substances 0.000 claims description 42
- 238000005070 sampling Methods 0.000 claims description 21
- 238000001914 filtration Methods 0.000 abstract description 12
- 239000003344 environmental pollutant Substances 0.000 description 9
- 231100000719 pollutant Toxicity 0.000 description 9
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000218606 Pinus contorta Species 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005250 beta ray Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000000673 shore pine Nutrition 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
Images
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/05—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles
- F02C7/055—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for obviating the penetration of damaging objects or particles with intake grids, screens or guards
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/057—Control or regulation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an airborne passive air inlet special pollution real-time rapid monitoring system, which relates to an aircraft special pollution control system and comprises an engine, a primary filter, a pipeline branch control valve, an environment control system, a monitoring instrument and an aircraft cabin which are sequentially communicated through a pipeline; the high-efficiency filter is communicated with a pipeline between the primary filter and the pipeline branch control valve through an inlet branch, and is communicated with a pipeline between the pipeline branch control valve and the environment control system through an outlet branch; a high-efficiency filter branch control valve is arranged on the inlet branch; the monitoring instrument is connected with the high-efficiency filter branch control valve through a first signal feedback passage, and the monitoring instrument is connected with the pipeline branch control valve through a second signal feedback passage. The on-board filtering device is controlled to be opened or closed in real time through signals transmitted by the monitoring instrument, so that the on-board filtering device does not need to be opened for a long time, and energy is saved.
Description
Technical Field
The invention relates to the field of airplane special pollution control and monitoring, in particular to an airborne passive air intake special pollution real-time rapid monitoring system.
Background
The existing airplane special pollution control is that a filter device is arranged after engine bleed air, and the bleed air of the engine is filtered after flowing through the filter device to remove solid particle pollutants in the bleed air. The existing airplane airborne filtering device cannot judge whether to open the airborne filtering device according to the concentration of external solid pollutants, so that the airborne filtering device needs to be opened for a long time and consumes relatively energy.
Disclosure of Invention
The invention aims to provide an airborne passive air intake special pollution real-time rapid monitoring system, which aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an airborne passive air intake special pollution real-time rapid monitoring system, which comprises an engine, a primary filter, a pipeline branch control valve, an environment control system, a monitoring instrument and an airplane cabin which are sequentially communicated through a pipeline; the high-efficiency filter is communicated with a pipeline between the primary filter and the pipeline branch control valve through an inlet branch, and is communicated with a pipeline between the pipeline branch control valve and the environment control system through an outlet branch; a high-efficiency filter branch control valve is arranged on the inlet branch; the monitoring instrument is connected with the high-efficiency filter branch control valve through a first signal feedback passage, and the monitoring instrument is connected with the pipeline branch control valve through a second signal feedback passage.
Optionally, the monitoring instrument includes a monitoring instrument housing having openings at both ends and respectively connected to the pipelines, a detector assembly is disposed in the monitoring instrument housing, the detector assembly includes a gamma particle monitor assembly, the gamma particle monitor assembly includes a housing, a sampling port is disposed at an inlet end of the housing, the sampling port includes an inlet groove, the inlet groove is a tapered structure having a gradually decreasing diameter and having openings at both side walls and bottom walls, and a distal end of the gamma particle monitor assembly is open; a beta particle monitor assembly is arranged in the inlet groove, and the inlet end of the beta particle monitor assembly is communicated with the bottom wall of the inlet groove; the outlet end of the beta particle monitor component is communicated with the tail end opening of the gamma particle monitor component, a sensor is arranged at the tail end opening of the gamma particle monitor component, and the sensor is respectively connected with the first signal feedback channel and the second signal feedback channel; filter paper is arranged between the sensor and the outlet end of the beta particle monitor component, and the upper end and the lower end of the filter paper are respectively arranged on an automatic filter paper feeding mechanism; the gamma particle monitor assembly is open-ended.
Optionally, the whole monitoring instrument shell is of a streamline structure, and the sampling port is of a variable cross-section structure with a gradually decreasing cross-section.
Optionally, the detector assembly is of a columnar structure, and the detector assembly is fixed on the inner wall of the shell of the monitoring instrument through a support.
Optionally, the β particle monitor assembly includes a first monitor member, a second monitor member is disposed in the first monitor member, a cross section of the first monitor member is a circular structure, a diameter of an inlet end of the first monitor member is smaller than a diameter of an outlet end of the first monitor member, and a sidewall from the inlet end of the first monitor member to the outlet end of the first monitor member is a smooth arc structure; the outlet end of the first monitoring piece is provided with a baffle, and the middle of the baffle is provided with a through hole; the second monitoring piece is a water-drop-shaped structure with a hollow interior and two open ends, and the diameter of the inlet end of the second monitoring piece is smaller than that of the outlet end of the second monitoring piece.
Compared with the prior art, the invention has the following technical effects:
the invention solves the problem that the airplane supports the real-time and rapid monitoring and control of the gamma dose rate and beta activity of the gas-solid diffusion special material; through the monitoring of gamma monitor and beta monitor to special type pollution concentration to transmit monitoring signal to airborne filter equipment, filter equipment judges opening or closing of each branch road of airborne filter equipment according to the concentration signal of transmission, thereby has reached the real-time supervision to special pollutant, and with monitoring signal transmission to the sensor in, the information transmission of sensor to filter equipment, thereby realize the real-time control to filter equipment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of an airborne passive air intake special pollution real-time rapid monitoring system of the invention;
FIG. 2 is a schematic plan view of a cross-sectional structure of a monitoring device according to the present invention;
wherein, 1 is an engine, 2 is a primary filter, 3 is a pipeline branch control valve, 4 is an environment control system, 5 is a monitoring instrument, 501 is a monitoring instrument shell, 502 is a gamma particle monitor component, 503 is a sampling port, 504 is a beta particle monitor component, 505 is a sensor, 506 is an automatic paper feeding mechanism of filter paper, 507 is a shell, 6 is an aircraft cabin, 7 is a high-efficiency filter, 8 is an inlet branch, 9 is an outlet branch, 10 is a high-efficiency filter branch control valve, 11 is a first signal feedback channel, 12 is a second signal feedback channel, 13 is a bracket, 14 is a sampling airflow, and 15 is a bypass airflow.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an airborne passive air intake special pollution real-time rapid monitoring system, which aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides an airborne passive air intake special pollution real-time rapid monitoring system, which comprises an engine 1, a primary filter 2, a pipeline branch control valve 3, an environment control system 4, a monitoring instrument 5 and an airplane cabin 6 which are sequentially communicated through a pipeline, as shown in figure 1; the device also comprises a high-efficiency filter 7, wherein the high-efficiency filter 7 is communicated with a pipeline between the primary filter 2 and the pipeline branch control valve 3 through an inlet branch 8, and the high-efficiency filter 7 is communicated with a pipeline between the pipeline branch control valve 3 and the environment control system 4 through an outlet branch 9; a high-efficiency filter branch control valve 10 is arranged on the inlet branch 8; the monitoring instrument 5 is connected with the high-efficiency filter branch control valve 10 through a first signal feedback path 11, and the monitoring instrument 5 is connected with the pipeline branch control valve 3 through a second signal feedback path 12. In fig. 1, C1 and C2 are monitoring instruments for monitoring concentration values of the specific pollutants.
Further preferably, as shown in fig. 2, the monitoring instrument 5 includes a monitoring instrument housing 501 with two open ends and respectively connected to a pipeline, a detector assembly is fixedly disposed in the monitoring instrument housing 501 through a support 13, the detector assembly includes a gamma particle monitor assembly 502, a sampling port 503 is disposed at an inlet end of the gamma particle monitor assembly 502, the sampling port 503 includes an inlet groove, the inlet groove is a tapered structure with a gradually reduced diameter and open side walls and bottom walls, the gamma particle monitor assembly 502 includes a sealed housing 507, and a terminal opening of the housing 507; a beta particle monitor assembly 504 is arranged in the inlet groove, and the inlet end of the beta particle monitor assembly 504 is communicated with the bottom wall of the inlet groove; the outlet end of the beta particle monitor assembly 504 is communicated with the end opening of the gamma particle monitor assembly 502, a sensor 505 is arranged at the end opening of the gamma particle monitor assembly 502, and the sensor 505 is respectively connected with the first signal feedback path 11 and the second signal feedback path 12; and filter paper is arranged between the sensor 505 and the outlet end of the beta particle monitor assembly 504, and the upper end and the lower end of the filter paper are respectively arranged on an automatic filter paper feeding mechanism 506.
Specifically, the overall monitoring instrument housing 501 is a streamline structure, and the sampling port 503 is a variable cross-section structure with a gradually decreasing cross-section. The detector assembly is of a columnar structure and is fixed on the inner wall of the monitoring instrument shell 501 through a support. The beta particle monitor assembly 504 comprises a first monitor member, a second monitor member is arranged in the first monitor member, the cross section of the first monitor member is of a circular structure, the diameter of the inlet end of the first monitor member is smaller than that of the outlet end of the first monitor member, and the side wall from the inlet end of the first monitor member to the outlet end of the first monitor member is of a smooth arc structure; the outlet end of the first monitoring piece is provided with a baffle, and the middle of the baffle is provided with a through hole; the second monitoring piece is a drop-shaped structure with hollow inside and two open ends, and the diameter of the inlet end of the second monitoring piece is smaller than that of the outlet end of the second monitoring piece.
When the engine bypass control valve works, after engine bleed air flows through the primary filter 2, the pipeline bypass control valve 3 is opened and the high-efficiency filter bypass control valve 10 is closed under a common condition. Judging which branch of the filter device is opened according to the concentration value of the special pollutant monitored in real time by the monitoring instrument 5, if the concentration value monitored by the monitoring instrument 5 is larger than the standard value of a given cabin, closing the pipeline branch control valve 3 at the moment, and opening the high-efficiency filter branch control valve 10; if the concentration value monitored by the monitoring instrument 5 is less than or equal to the standard value of the given cabin, the pipeline branch control valve 3 is opened, and the high-efficiency filter branch control valve 10 is closed; the air flowing through the filtering device flows into the aircraft cabin after passing through the environment control system, so that the filtering device is prevented from being opened all the time, and the energy is saved.
The monitoring instrument 5 is arranged in a front pipeline of the cabin, so that the real-time monitoring of the special pollution is realized. The monitoring instrument housing 501 of the monitor 5 is designed to be streamlined to reduce the flow loss of the airflow; meanwhile, in order to enable the airflow to smoothly enter the sampling cavity, the sampling port 503 is designed to be of a variable cross-section structure according to the Bernoulli equation, namely, the airflow enters the sampling cavity from a position with a larger cross-sectional area due to the action of pressure difference, and meanwhile, in order to enable the sampling concentration to be the same as the actual concentration of the bleed air, equal flow state sampling is adopted. The bypass airflow 15 circulates through a gap between the shell 507 and the monitoring instrument shell 501, the sampling airflow 14 enters a channel of the gamma particle monitor component and the beta particle monitor component through a sampling inlet of the monitoring instrument from big to small, then the sampling airflow 14 is introduced into the position of the automatic paper feeding mechanism of the filter paper, the automatic paper feeding mechanism 506 of the filter paper automatically feeds paper to filter bleed air, and the filtered sampling airflow 14 is discharged through the sensor and the open type discharge pipeline; the automatic paper feeding mechanism for the filter paper can realize continuous collection of special pollutants, and the pollutants on the filter paper are monitored by the gamma particle monitor component 502 and the beta particle monitor component 504, specifically, the automatic paper feeding mechanism for the filter paper adopts thin plastic flash with the thickness of 0.5mm, is insensitive to gamma rays, has the length and width dimension consistent with the dimension of a filter opening, is covered with a light shielding layer at the front end of the plastic flash, is provided with a photoconductive connecting shore pine photomultiplier at the rear end, and multiplies and outputs signals. The thin plastic flash detector is installed in a water drop cavity of the second monitoring piece, the thin plastic flash edge is completely matched and sealed with the bottom of the water drop cavity, and sampling gas mixed with particles is prevented from entering the cavity to pollute a beta detector and electronics. And monitoring gamma rays by using a GM tube detector. Because the beta ray is a continuous spectrum, the energy spectrum measurement can not be realized, the purpose of monitoring is to measure the beta aerosol counting on the filter paper, and when the species and the proportion of the nuclide are known, the activity concentration of the nuclide is calibrated; for gamma dose rate monitoring, a detector capable of measuring gamma dose rate is selected. Monitoring information is transmitted to the filtering device through the signal sensor; thereby realizing the real-time monitoring of the special pollutants.
The invention adds a real-time monitoring instrument 5, designs the real-time monitoring instrument into a passive air inlet structure, realizes the real-time monitoring of special pollutants by utilizing an automatic paper feeding mechanism, transmits a monitoring signal into a sensor 505, and transmits the information of the sensor 505 to a filtering device, thereby realizing the real-time control of the filtering device.
The invention designs the filtering device into a two-branch control mode; the monitoring instrument 5 is designed into a passive structure, so that the number of parts of the monitoring device is reduced, the size and the structural complexity of the device are reduced, and on the basis of realizing real-time and rapid monitoring on special pollution, each branch of the filtering device can be controlled to be opened or closed, thereby being beneficial to energy conservation; and the inlet and outlet cross sections of the beta particle monitor component are designed to be small, so that the phenomenon that some particle monitor components fall off due to airplane vibration and new influence is caused on the downstream of the airplane is prevented.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (4)
1. The utility model provides an airborne passive special pollution real-time rapid monitoring system that admits air which characterized in that: the system comprises an engine, a primary filter, a pipeline branch control valve, an environment control system, a monitoring instrument and an aircraft cabin which are sequentially communicated through a pipeline; the high-efficiency filter is communicated with a pipeline between the primary filter and the pipeline branch control valve through an inlet branch, and is communicated with a pipeline between the pipeline branch control valve and the environment control system through an outlet branch; a high-efficiency filter branch control valve is arranged on the inlet branch; the monitoring instrument is connected with the high-efficiency filter branch control valve through a first signal feedback path, and the monitoring instrument is connected with the pipeline branch control valve through a second signal feedback path; the monitoring instrument comprises a monitoring instrument shell, two ends of the monitoring instrument shell are opened, pipelines are connected with the monitoring instrument shell respectively, a detector assembly is arranged in the monitoring instrument shell, the detector assembly comprises a gamma particle monitor assembly, the gamma particle monitor assembly comprises a shell, a sampling opening is formed in the inlet end of the shell, the sampling opening comprises an inlet groove, the inlet groove is of a conical structure, the diameter of the inlet groove is gradually reduced, the side wall and the bottom wall of the inlet groove are both opened, and the tail end of the gamma particle monitor assembly is opened; a beta particle monitor assembly is arranged in the inlet groove, and the inlet end of the beta particle monitor assembly is communicated with the bottom wall of the inlet groove; the outlet end of the beta particle monitor component is communicated with the tail end opening of the gamma particle monitor component, a sensor is arranged at the tail end opening of the gamma particle monitor component, and the sensor is respectively connected with the first signal feedback channel and the second signal feedback channel; filter paper is arranged between the sensor and the outlet end of the beta particle monitor component, and the upper end and the lower end of the filter paper are respectively arranged on an automatic filter paper feeding mechanism; the gamma particle monitor assembly is open-ended.
2. The system for real-time and rapid monitoring of airborne passive air intake special pollution according to claim 1, characterized in that: the whole monitoring instrument shell is of a streamline structure, and the sampling port is of a variable cross-section structure with a gradually-reduced cross section.
3. The system for real-time and rapid monitoring of airborne passive air intake special pollution according to claim 1, characterized in that: the detector assembly is of a columnar structure and is fixed on the inner wall of the shell of the monitoring instrument through a support.
4. The system for real-time and rapid monitoring of airborne passive air intake special pollution according to claim 1, characterized in that: the beta particle monitor component comprises a first monitoring piece, a second monitoring piece is arranged in the first monitoring piece, the cross section of the first monitoring piece is of a circular structure, the diameter of the inlet end of the first monitoring piece is smaller than that of the outlet end of the first monitoring piece, and the side wall from the inlet end of the first monitoring piece to the outlet end of the first monitoring piece is of a smooth arc structure; the outlet end of the first monitoring piece is provided with a baffle, and the middle of the baffle is provided with a through hole; the second monitoring piece is a water-drop-shaped structure with a hollow interior and two open ends, and the diameter of the inlet end of the second monitoring piece is smaller than that of the outlet end of the second monitoring piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010020862.6A CN111060431B (en) | 2020-01-09 | 2020-01-09 | Airborne passive air intake special pollution real-time rapid monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010020862.6A CN111060431B (en) | 2020-01-09 | 2020-01-09 | Airborne passive air intake special pollution real-time rapid monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111060431A CN111060431A (en) | 2020-04-24 |
| CN111060431B true CN111060431B (en) | 2020-12-25 |
Family
ID=70306875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010020862.6A Expired - Fee Related CN111060431B (en) | 2020-01-09 | 2020-01-09 | Airborne passive air intake special pollution real-time rapid monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111060431B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112246008A (en) * | 2020-10-19 | 2021-01-22 | 中国能源建设集团东北电力第一工程有限公司 | Precise plate type oil filter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3245882B2 (en) * | 1990-10-24 | 2002-01-15 | 株式会社日立製作所 | Pattern forming method and projection exposure apparatus |
| FR2735702B1 (en) * | 1995-06-22 | 1997-07-25 | Inst Textile De France | DEVICE FOR PHYSICO-CHEMICAL SEPARATION OF CONSTITUENTS OF A FLUID |
| CN102436258A (en) * | 2011-12-06 | 2012-05-02 | 上海交通大学 | Automation device for functional test of cabin of civil aircraft environmental control system |
| CN104215997B (en) * | 2014-09-03 | 2016-09-21 | 北京市射线应用研究中心 | A kind of α and γ dual pathways power spectrum continuous monitoring method and monitoring system |
| CN105329069B (en) * | 2015-11-04 | 2017-07-11 | 浙江大学 | The automobile passenger compartment conditioner and its method assessed based on air quality |
| CN110481791B (en) * | 2019-09-18 | 2020-12-15 | 南京航空航天大学 | Air conditioning system for aircraft cabin |
-
2020
- 2020-01-09 CN CN202010020862.6A patent/CN111060431B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN111060431A (en) | 2020-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111060431B (en) | Airborne passive air intake special pollution real-time rapid monitoring system | |
| CN204649518U (en) | A kind of dynamically aerosol diluter | |
| CN103575638B (en) | A kind of light scattering type particle counter and size distribution algorithm thereof | |
| CN101900588A (en) | The flow sensing equipment that comprises tapered flow channel | |
| CN104729890B (en) | A kind of PM2.5 source resolution sampling apparatuses based on feedback flow control | |
| CN104819919A (en) | Detector for content of discharged particulate matter | |
| CN203894139U (en) | Cooking fume particle testing device of extractor hood | |
| CN104596807A (en) | Sampling measuring device and sampling measuring method of radioactive aerosol | |
| CN101398368A (en) | Aerated solids particle laser analyzer gas path system for aerated solids particle laser analyzer | |
| CN111397678A (en) | Multistage rectification MEMS gas flowmeter | |
| CN209559501U (en) | A kind of marine gas turbine gas handling system comprehensive simulation test system | |
| CN208476735U (en) | A kind of binary channels sensor of dust concentration and equipment | |
| CN206440580U (en) | Airborne dust monitoring system volume control device | |
| CN204064747U (en) | A kind of Intelligent constant flow low discharge gas collecting pick-up unit | |
| CN209069695U (en) | A kind of aerosol dilution device | |
| CN202710577U (en) | Peroxide online detection device | |
| CN102928034A (en) | Method and device for metering gas during extraction | |
| CN204461840U (en) | A kind of PM2.5 source resolution sampling apparatus controlled based on gas concentration lwevel | |
| CN112710786A (en) | Online gas monitoring device of unmanned aerial vehicle | |
| CN201503390U (en) | Sample pond for correcting concentration of smoke | |
| CN214097349U (en) | Online gas monitoring device of unmanned aerial vehicle | |
| CN110441202A (en) | A kind of calibration system and its calibration method of aerodynamic size spectrometer | |
| CN107202752A (en) | A kind of anti-net of wadding of particulate matter sensors | |
| CN220473115U (en) | Individual sampler | |
| CN208172618U (en) | A kind of humidity device1 |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |