CN207717129U - A kind of flue dust gas sampling comprehensive detection system - Google Patents

A kind of flue dust gas sampling comprehensive detection system Download PDF

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Publication number
CN207717129U
CN207717129U CN201721398758.0U CN201721398758U CN207717129U CN 207717129 U CN207717129 U CN 207717129U CN 201721398758 U CN201721398758 U CN 201721398758U CN 207717129 U CN207717129 U CN 207717129U
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gas
module
flow
pressure
control
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万丽芬
桑晓鸣
尹彦臻
高振华
李虹杰
范新峰
何成
吴晓霖
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Hubei Provincial Institute Of Measurement And Testing
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The utility model is related to a kind of flue dust gas sampling comprehensive detection systems, including industrial personal computer, the input terminal of the industrial personal computer is connected separately with flow detection module, temperature-measuring module, pressure detecting module, atmosphere measuring module, flue gas inspection module, flow rate detection module.The utility model realizes on a platform to being examined and determine and being calibrated in all parameters, ensure the accuracy of continuous data, calibrating efficiency is increased substantially, smoke dust sampling instrument integrated measuring is more accurate, quick, compensates for the blank in domestic smoke dust sampling instrument calibrating field.The utility model detecting system can full performance detect the various performance parameters of the pollution sources sampler such as smoke flue gas sampling device in all directions, integrated measuring is implemented to indexs such as temperature, flue-gas temperatures before the atmospheric pressure of tested instrument, flow, environment temperature, meter so that smoke dust sampling instrument integrated measuring is more accurate, quick.

Description

A kind of flue dust gas sampling comprehensive detection system
Technical field
The utility model is related to measuring and testing device technical field, more particularly to a kind of collection flow detection, pressure detecting, Temperature detection etc. is a variety of to detect the flue dust gas sampling comprehensive detection system being integrated.
Background technology
Dust collector need to measure profession through temperature, pressure, flow and chemistry etc. and carry out gauge check, it is measured at present Work there are still detection efficiencies low, main shortcoming following points:
1, need the different majors such as temperature, pressure, flow and chemistry personnel carry out gauge check work, be related to personnel, Professional excessive, human cost increases considerably;This project achievement can realize that disposable disposably completes all to detect work.
2, examination criteria is inconsistent, and temperature, pressure and flow etc. are detected according to respective standard schedule, same device Provide the certificate of multiple and different professions.A certificate need to be only provided by this project, with reference to a standard.
3, it is mutual when flue dust gas sampling relevant parameter (temperature, pressure, flow velocity, the flow and flue gas content etc.) past is detected It is independent to carry out, it is orthogonal.And this item detection parameter can simultaneously dynamic detection.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a kind of by pressure, flow, temperature The detection projects such as degree, chemistry, flow velocity are combined as a set of integrated system, and the multiple parameters of flue dust (gas) sampler are quickly examined in realization It is fixed, it realizes detection integration, improves the flue dust gas sampling comprehensive detection system of calibrating accuracy and efficiency.
To achieve the above object, a kind of flue dust gas sampling comprehensive detection system provided by the utility model, including industry control The input terminal of machine, the industrial personal computer is connected separately with flow detection module, temperature-measuring module, pressure detecting module, atmospheric pressure Measurement module, flue gas inspection module, flow rate detection module.
Timing detection module is provided in the industrial personal computer.
The flow detection module includes for carrying the pipeline section of fluid, the upper end transducing in pipeline section side upper end being arranged Device is arranged lower end energy converter in pipeline section side lower end, upper end energy converter and lower end energy converter output flow signal to flow and surveys Calculate module.
The temperature sensor and temperature control device that the temperature-measuring module includes stem body stove, is arranged in stem body stove.
The pressure detecting module includes pressure generating unit and pressure measurement cell, and pressure generating unit includes positive/negative-pressure Power switches air source, pressure-regulating device and pressure obtaning device.
The flue gas inspection module includes the steel cylinder gas of several branches, and the steel cylinder gas of each branch road is connected with steel cylinder gas mark Air valve after zero gas is by zero gas transfer valve, enters zero gas and cleans valve, the steel cylinder gas on each branch road is connected with steel cylinder gas mark all the way Under the control of air valve and the first mass flow controller, distribution is exported after being mixed into the first mixed gas cylinder, another way enters second After mass flow controller, it is divided into two branches, a branch enters the second mixed gas cylinder, and another branch enters solenoid valve, pressure regulator valve, limit Enter the second mixed gas cylinder after discharge orifice, flow sensor, oxygen generator, the distribution of the second mixed gas cylinder output enters the first mixed gas cylinder Distribution is exported, the distribution of output is the SO of various concentration2、NO2, CO, contained with the associated gas detected in Air pollen Amount.
The flow rate detection module includes the axial flow blower of Frequency Converter Control, and frequency converter connects phototube coupling unit, axis stream The model bay of wind turbine is connected by multiple sensor connection signal conditioning unit, phototube coupling unit and signal condition unit It is connected to acquisition and control system, the acquisition is connected with servo controller with control system, and servo controller is by controlling servo Motor connects angle changing mechanism, and instrument output end to be measured is connected to acquisition and control system, acquisition and control by signal condition unit System processed connects industrial personal computer by bus.
The whole system of the utility model is by several module compositions, including flow detection module, pressure detecting module, temperature Spend the module compositions such as detection module, flow rate detection module, flue gas inspection module, atmospheric pressure and timing detection.In view of flue dust is adopted Sample device has plenty of integrated with flue gas analyzer, and the data of all modules are uploaded to microcomputer host, and host software will be into Row observing and controlling and data processing.Due to the physical quantitys such as temperature, pressure, flow measurement and chemical quantity measurement due to temperature etc. original Because that may influence each other, therefore the composition of system will be made of two cabinets, and a cabinet is used for the detection of soot fraction, including dynamic The detection of the parameters such as pressure, flow, temperature before pressure, static pressure, meter, another cabinet are used for the detection of flue gas partial.
Can be simultaneously to the real-time dynamic calibration of the parameters such as temperature, pressure, flow, atmospheric pressure, flow velocity and flue gas content, flue dust is adopted All parameters of sample instrument can complete Detection task in a systematic detection device.
A kind of flue dust gas sampling comprehensive detection system provided by the utility model, system being capable of the comprehensive inspections of full performance The various performance parameters for surveying the pollution sources samplers such as smoke flue gas sampling device, to being pressed before the dynamic pressure of tested instrument, static pressure, meter, greatly The indexs such as temperature, flue-gas temperature, the air-tightness of instrument, flue gas concentration implement one before air pressure, flow, flow velocity, environment temperature, meter The dynamic of change measures (state for simulating on-line monitoring), has innovative point below:
(1) integrated innovation
Tthe utility model system can simultaneously to parameters such as temperature, pressure, flow, atmospheric pressure, flow velocitys when row automatic Verification, cigarette All parameters that dirt sampling instrument is surveyed are examined and determine and are calibrated in a systematic detection device, and flow, pressure, temperature are related to The high level automation of detection is realized in the organic combination of degree and process implementing measure.
(2) the flow detection module stablized
Inside flowmeter detection module by way of boosting again after voltage stabilizing, make the ultrasonic wave voltage of transmission than it is general more Height, signal is stronger, while anti-interference is also improved;Since rational power consumption range controls, by ultrasonic wave when processing It sends number to increase, transmission frequency and sample frequency are accelerated.Changes in flow rate in this way in runner can be sampled and be counted more quickly It counts and;It is wider than general civilian gage requirement range in cost, therefore use meter specially amplification chip so that faint letter Number amplification factor can increase as possible, simultaneously effective reduce the distortion of signal, improve signal-to-noise ratio.Finally count to get Flow more stablize.
(3) equilibrium temperature verification system is provided
This system uses stem body stove as the core component of temperature detection, and furnace body selects the cylindrical Muffle furnace of customization, stove Body inner homogeneous wraps up high power exchange heater strip as heating source, the annular brass heat conducting pipe of burner hearth inside installation, because of its specific heat Rong great, heat conduction are fast, after non-uniform heating source isolation originally, are conducted to inner hollow, are formed stable by heat conducting pipe Thermal field realizes that temperature examines and determine necessary requirement.
(4) dynamic pressure generating system
The dynamic pressure generating system of innovation, ± 55kPa pressure generating systems are using multiplication of voltage mensuration and double in the system Stage pressure genetic method uses ± 30kPa differential pressure pick-up measurement ± 55kPa static pressure, the first order first in specific implementation process Pressure generating system generates the negative terminal that a reference pressure acts on sensor, after waiting for reference pressure to stablize, the second stage pressure Pressure within required ± 55kPa directly occurs for generating system, and such design can greatly improve pressure measurement accuracy And resolution ratio, improve the accuracy of calibrating.
The good effect that the utility model has:The detecting system performance can detect smoke flue gas sampling in all directions entirely The various performance parameters of the pollution sources sampler such as device, to temperature, flue gas before the atmospheric pressure of tested instrument, flow, environment temperature, meter The indexs such as temperature implement integrated measuring so that smoke dust sampling instrument integrated measuring is more accurate, quick, realizes and is put down at one All parameters are examined and determine and calibrated on platform, ensures the accuracy of continuous data, increases substantially calibrating efficiency, compensate for state The blank in interior smoke dust sampling instrument calibrating field.
Description of the drawings
Fig. 1 is the utility model entirety functional block diagram;
Fig. 2 is the utility model flowmeter detection module structure diagram;
Fig. 3 is the utility model flowmeter detection module schematic block circuit diagram;
Fig. 4 is the utility model flow rate detection functional block diagram;
Fig. 5 is the utility model wind tunnel test system diagram;
In figure:1, industrial personal computer;2, flow detection module;3, temperature-measuring module;4, pressure detecting module;5, atmospheric pressure is surveyed Measure module;6, flue gas inspection module;7, flow rate detection module;8, timing detection module;2.1, pipeline section;2.2, upper end energy converter; 2.3, lower end energy converter;2.5, MCU control module;2.6, button;2.7, display screen;2.8, power supply;2.9, communication module; 2.10, ultrasonic signal processing module;2.11, signal transmitting and receiving circuit.
Specific implementation mode
For ease of being better understood from the purpose, structure, characteristics and efficacy of the utility model, in conjunction with attached drawing and specifically Embodiment is described in further detail the utility model.
As shown in Figure 1, a kind of flue dust gas sampling comprehensive detection system of the utility model design, including industrial personal computer 1, work The input terminal of control machine 1 is connected separately with flow detection module 2, temperature-measuring module 3, pressure detecting module 4, atmosphere measuring mould Block 5, flue gas inspection module 6, flow rate detection module 7.
Timing detection module 8 is additionally provided in industrial personal computer 1;Flow detection module 2 includes the pipeline section for carrying fluid 2.1, be arranged 2.1 side upper end of pipeline section upper end energy converter 2.2, lower end energy converter in 2.1 side lower end of pipeline section is set 2.3, upper end energy converter 2.2 and 2.3 output flow signal of lower end energy converter to flow measuring module.Temperature-measuring module 3 includes Stem body stove, the temperature sensor and temperature control device being arranged in stem body stove.
Pressure detecting module 4 includes pressure generating unit and pressure measurement cell, and pressure generating unit includes positive/negative pressure Switch air source, pressure-regulating device and pressure obtaning device.
Flue gas inspection module 6 includes the steel cylinder gas of several branches, and the steel cylinder gas of each branch road is connected with steel cylinder gas standard gas Valve after zero gas is by zero gas transfer valve, enters zero gas and cleans valve, the steel cylinder gas on each branch road is connected with steel cylinder gas standard gas all the way Under the control of valve and the first mass flow controller, distribution is exported after being mixed into the first mixed gas cylinder, another way enters the second matter After measuring flow controller, it is divided into two branches, a branch enters the second mixed gas cylinder, and another branch enters solenoid valve, pressure regulator valve, current limliting Enter the second mixed gas cylinder after hole, flow sensor, oxygen generator, the distribution of the second mixed gas cylinder output is defeated into the first mixed gas cylinder Go out distribution, the distribution of output is the SO of various concentration2、NO2, CO, contained with the associated gas detected in Air pollen Amount.
Flow rate detection module 7 includes the axial flow blower of Frequency Converter Control, and frequency converter connects phototube coupling unit, axial flow blower Model bay by multiple sensor connection signal conditioning unit, phototube coupling unit and signal condition unit are connected to Acquisition and control system, the acquisition are connected with servo controller with control system, and servo controller passes through control servomotor Angle changing mechanism is connected, instrument output end to be measured is connected to acquisition and control system by signal condition unit, and acquisition is with control System connects industrial personal computer 1 by bus.
As shown in Figures 2 and 3, flowmeter detection module 2 includes for carrying the pipeline section 2.1 of fluid, being arranged in pipeline section 2.1 Lower end energy converter 2.3 and flow measuring mould in 2.1 side lower end of pipeline section is arranged in the upper end energy converter 2.2 of side upper end Block;Flow measuring module includes MCU control module 2.5, MCU control module 2.5 be connected separately with button 2.6, display screen 2.7, Power supply 2.8, communication module 2.9, ultrasonic signal processing module 2.10, ultrasonic signal processing module 2.10 are connected with signal receipts Power Generation Road 2.11, signal transmitting and receiving circuit 2.11 are connect with upper end energy converter 2.2 and lower end energy converter 2.3 respectively.Operation principle is: Flow quantity detecting system uses ultrasonic flow, when flow meters work, send ultrasonic wave downwards to lower end from upper end energy converter first Energy converter, and measure the flight time T1 of ultrasonic wave, then switching circuit, from lower end, energy converter sends up ultrasonic wave to upper end Energy converter, and measure the flight time T2 of ultrasonic wave.It, can by following formula in view of the difference of this two flight time To obtain the rate of fluid.There is rate that can calculate flow along with the volume of pipeline section.The flowmeter detection module of use Due to being full electronic, no mechanical part is not influenced by mechanical wear, failure;And small, light-weight, reproducible, pressure Damage it is small, it is non-aging, so that the reliability of product and precision is improved very much.
The core that flowmeter detection module 2 measures flow velocity is time-to-digital converter chip and circuit.The chip has high-precision The time of degree measures function, and resolution ratio reaches 65ps, basic measurement guarantee is provided for the application of time difference method flowmeter;It is built-in Impulse generator ultrasonic transducer can be directly driven in the flow measurement of pipe with small pipe diameter, without in addition increase driving chip.
Chip collocation MCU and comparator, analog switch element can complete control and the design of time measuring loop.It should The PCB surface product that equipment is greatly reduced while scheme makes circuit design be simplified makes the production of equipment, safeguards also more just Just it is easy.Power supply is single channel DC power supply, and voltage 12V ± 3V, electric current is more than 100mA;Power management section mainly filters, surely The effects that pressure, inspection pressure;Button and display screen can facilitate the various table intrinsic parameters of real time inspection;Communication module interface is standard RS485 interfaces are mainly used for the communication with host computer;Ultrasonic signal process part mainly filters received signal Wave such as amplifies, compares at the processing;Signal transmitting and receiving circuit is mainly to generate the electric signal of ultrasonic frequency, and send and receive logical The switching repeatedly in road;Energy converter mainly converts electrical signals to ultrasonic wave and is dealt into runner, and receives the ultrasound in runner Wave signal is reversely converted into electric signal;MCU is key control unit, ensures the normal operation of whole system;Control whole work Make sequential, and will finally count out flow velocity after various signal processings.
Flue gas inspection module 6 using automatic distributing calibration system by the gas reference material that can be traced to the source to smoke chemistry amount into Row calibrating.Automatic distributing calibration dynamic gas generator can provide the gas of various concentration, and the gas of these various concentrations can For the calibration of surrounding air analyzer and pollution monitoring analyzer.The system can calculate dilution ratio automatically, and by micro- Manage the flow of device control mass flow controller.It realizes to various monitoring instrument single-points and multiple spot dynamic calibration, while can receive Host computer instruction carries out zero, range calibration.
Zero gas by zero gas transfer valve respectively with enter mixed gas under the control of three steel cylinder gas standard gas valves (two three-way electromagnetic valves) Distribution is exported after bottle mixing.(when cleaning gas circuit, zero gas purge valve is switched to opening state by closing;Zero gas is passed through by steel cylinder Remaining gas discharge in gas 1, steel cylinder gas 2,3 branch of steel cylinder gas, achievees the purpose that clean gas circuit).
This system further includes providing a set of dynamic gas mixer, and various concentration is exported by high accuracy mass flowmenter SO2, NO2, CO etc..
Dilute distribution:Using accurate mass flow controller come accurately control steel cylinder calibrating gas or other source gases with The mixing ratio of zero air (zero gas) is diluted, to which the steel cylinder calibrating gas of high concentration to be diluted to the standard of required concentration with zero gas Gas.The flow of required calibrating gas flow and diluent gas is calculated by formula (1):
In formula:CfFor diluent gas ultimate density (gas concentration calibrated to analytical instrument), 1 × 10-6;CbFor mark Quasi- gas concentration (the concentration nominal value of steel cylinder gas), 1 × 10-6;QOFor diluting gas flow (zero gas), L/min;QbFor Standard Gases Body flow (steel cylinder Standard Gases), mL/min.
Flow rate detection module 7 carries out the detection of flue dust (gas) sampler velocity parameters using wind-tunnel and standard pitot tube.Stream Fast detection module 7 includes the axial flow blower of Frequency Converter Control, and loudspeaker are disposed between axial flow blower output end and active section Mouth wind inlet section, honeycomb screen, stable section, contraction section, active section pass through sensor, angle changing mechanism, Devices to test output detection connection There are acquisition and control system.
Wind-tunnel is that energy is artificially generated and control air-flow is to simulate the flowing of object ambient gas, can be used for sampler opium pipe The detection of middle Pitot tube.Annular low-speed wind tunnel is by quaternary:Hole body portion, power section, Devices to test support and angle system System, TT&C system.Functional block diagram is as shown in Figure 4:
1) operation principle
Wind turbine uses axial fan, by Frequency Converter Control three phase alternating current motor rotating speed, to reach needed for active section Different wind speed.
Pitot tube is mounted on the second active section, and Pitot tube pitot hole should be aligned to drift angle<± 3 °, the first active section wind Speed is equal to the second active section wind speed divided by shrinkage ratio.
When Pitot tube measures wind speed, actual wind speed value is calculated as follows:
In formula:Vs is model bay actual wind speed value, m/s;P is actual measurement dynamic pressure value, Pa;K is coefficient of Pitot tube;ρ is Atmospheric density, kg/m3;P0 is laboratory's atmospheric pressure, Pa;T is air themperature in wind-tunnel, DEG C.
2) wind-tunnel computer automatic data collection and processing system
The hardware architecture diagram of wind tunnel test system is as figure 5 illustrates:
System hardware is made of part of data acquisition and control section, and part of data acquisition is by acquisition module, pressure difference sensing The components such as device, signal condition are constituted.Control section is by several portions such as photoisolator, frequency converter, axial fan, servo motor Point.Sensor (humiture, atmospheric pressure, pressure etc.), signal processing apparatus, data acquisition measuring device and data processing system etc. Measurement processing system is formed, wind tunnel test data are acquired, measured, analyzed and located under the control and management of computer Reason.
The utility model provides the pressure sensor that the function that air pressure is detected with timing uses resolution as 50Pa simultaneously, After circuit enhanced processing, is linearly corrected by software, carry out the calibration of atmospheric pressure.In atmosphere pressure sensor measurement range 80kPa, 90kPa, 100kPa, 110kPa or so totally four points are chosen respectively, are generated using pressure generator corresponding Normal pressure Ps(in the case where considering live atmospheric pressure), while reading monitor atmospheric pressure show value Pc
It is 0.01s electronic stopclocks as timing criteria to use resolution ratio, and the clock of its monitor with clocking capability is same When Shi Jilu is walked, minute is no less than 1h, and records its result.
In formula:δt--- timing error;
ti--- monitor clock timing, s;
ts--- electronic stopclock timing, s.
The detecting system of the utility model being capable of the pollution such as performance comprehensive detection smoke flue gas sampling device source sampling entirely The various performance parameters of device, to be tested before the dynamic pressure of instrument, static pressure, meter temperature before pressure, atmospheric pressure, flow, environment temperature, meter, The indexs such as flue-gas temperature implement integrated measuring.Using advanced ultrasonic flow measuring method, automatic pressure generating system and Stem body furnace temperature measuring system so that smoke dust sampling instrument integrated measuring is more accurate, quick.It is right on a platform to realize It is examined and determine and is calibrated in all parameters, ensured the accuracy of continuous data, increase substantially calibrating efficiency, compensate for domestic cigarette Dirt sampler examines and determine the blank in field.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model It encloses, should all cover in the right of the utility model.

Claims (6)

1. a kind of flue dust gas sampling comprehensive detection system, it is characterised in that:Including industrial personal computer (1), the industrial personal computer (1) it is defeated Enter end and is connected separately with flow detection module (2), temperature-measuring module (3), pressure detecting module (4), atmosphere measuring module (5), flue gas inspection module (6), flow rate detection module (7), the flue gas inspection module (6) include the steel cylinder gas of several branches, The steel cylinder gas of each branch road is connected with steel cylinder gas standard gas valve, after zero gas is by zero gas transfer valve, enters zero gas all the way and cleans valve, Steel cylinder gas on each branch road is connected under the control of steel cylinder gas standard gas valve and the first mass flow controller, into the first mixed gas Distribution is exported after bottle mixing, after another way enters the second mass flow controller, is divided into two branches, a branch enters the second mixed gas Bottle, another branch enter the second mixed gas cylinder after entering solenoid valve, pressure regulator valve, metering hole, flow sensor, oxygen generator, the The distribution of two mixed gas cylinder outputs enters the first mixed gas cylinder and exports distribution, and the distribution of output is the SO of various concentration2、NO2, CO, with inspection Survey the associated gas content in Air pollen.
2. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that:In the industrial personal computer (1) It is provided with timing detection module (8).
3. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that:The flow detection module (2) include for carry the pipeline section of fluid (2.1), setting pipeline section (2.1) side upper end upper end energy converter (2.2), setting Lower end energy converter (2.3) in pipeline section (2.1) side lower end, upper end energy converter (2.2) and lower end energy converter (2.3) output flow Signal is to flow measuring module.
4. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that:The temperature-measuring module (3) include stem body stove, the temperature sensor and temperature control device that are arranged in stem body stove.
5. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that:The pressure detecting module (4) include pressure generating unit and pressure measurement cell, pressure generating unit includes positive/negative pressure switching air source, pressure adjusting dress It sets and pressure obtaning device.
6. flue dust gas sampling comprehensive detection system according to claim 1, it is characterised in that:The flow rate detection module (7) include Frequency Converter Control axial flow blower, frequency converter connects phototube coupling unit, and the model bay of axial flow blower passes through more Road sensor connection signal conditioning unit, phototube coupling unit and signal condition unit are connected to acquisition and control system, institute It states acquisition and is connected with servo controller with control system, servo controller connects angle changing mechanism by control servomotor, to be measured Instrument output end is connected to acquisition and control system by signal condition unit, and acquisition connect industry control with control system by bus Machine (1).
CN201721398758.0U 2017-10-27 2017-10-27 A kind of flue dust gas sampling comprehensive detection system Active CN207717129U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109991138A (en) * 2019-04-09 2019-07-09 上海北分科技股份有限公司 It is a kind of to utilize dust wind tunnel system test method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109991138A (en) * 2019-04-09 2019-07-09 上海北分科技股份有限公司 It is a kind of to utilize dust wind tunnel system test method
CN109991138B (en) * 2019-04-09 2021-06-11 上海北分科技股份有限公司 Wind tunnel system testing method by using dust

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