CN109238936A - A kind of compensation ventilation rate master bar calibrating installation and its calibration method - Google Patents
A kind of compensation ventilation rate master bar calibrating installation and its calibration method Download PDFInfo
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- 238000009423 ventilation Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 title claims abstract description 15
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- 238000005259 measurement Methods 0.000 claims description 17
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- 238000010943 off-gassing Methods 0.000 claims description 3
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- 238000009530 blood pressure measurement Methods 0.000 claims description 2
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- G—PHYSICS
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- 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
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/10—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing diffusion of components through a porous wall and measuring a pressure or volume difference
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a kind of compensation ventilation rate master bar calibrating installation and its calibration methods, including quantitative negative pressure device, fixture, first differential pressure pickup, second differential pressure pickup, flow sensor and needle valve, the both ends of fixture are respectively equipped with the first air inlet and air outlet, its side is equipped with the second air inlet, first air inlet is connected with needle valve, second air inlet is connected with flow sensor, the gas outlet of fixture is connected with the air entry of quantitative negative pressure device, first differential pressure pickup is connected in parallel at the gas outlet of fixture, second differential pressure pickup is connected in parallel between the first air inlet and the second air inlet.Have the function of automatic reading and flow correction, eliminates the human error of naked eyes reading introducing；Using needle valve, volume type flow sensor bring pressure difference is compensated.This calibrating installation has the advantages that accuracy is big, high-efficient, labor intensity is low etc..
Description
Technical field
The invention belongs to cigarette detecting instrument standard component collimation technique fields, and in particular to a kind of compensation ventilation rate standard
Stick calibrating installation and calibration method.
Background technique
Ventilation rate master bar is as the standard used on cigarette ventilation rate analyzer and cigarette physical property combined test stand
Part plays the effect of ventilation rate transmission of quantity value.Ventilation rate master bar it is daily in actual use, since operating frequency is high and ring
The factors such as border complexity, it may occur that the variation such as surface fracture pollution, end face and side-vented hole plug, material ageing causes
Ventilation rate master bar metering performance changes, and influences the accuracy of ventilation rate DATA REASONING.
To guarantee the accurate and reliable of ventilation rate master bar transmission of quantity value, ventilation rate master bar need to be calibrated.Currently, cigarette
Careless industry generallys use soap film flowmeter and measures as general gas flow and vent flow of the standard to ventilation rate master bar.It adopts
Carrying out calibration to ventilation rate master bar with soap film flowmeter has tripartite's planar defect, first is that naked eyes reading introduces human error, and surveys
The examination time is long, inefficiency, and labor intensity is larger；Second is that the test air for flowing through ventilation rate master bar is soaked by soap-film, can lead
It causes air viscosity to reduce to increase with measured flux；Third is that the soap-film and soap-film pipe of soap film flowmeter introduce pressure difference, it can convection current measurement
Amount accuracy has an impact.Therefore, it is necessary to develop the compensation ventilation rate master bar calibration cartridge that a set of accuracy is big, high-efficient
It sets, and establishes corresponding ventilation rate master bar calibration method.
Summary of the invention
Based on the deficiencies of the prior art, the purpose of the present invention is to provide a kind of compensation ventilation rate master bar calibrating installations
And calibration method.
A kind of compensation ventilation rate master bar calibrating installation, quantitative negative pressure device, folder including generating constant negative pressure air-flow
Fixture, the first differential pressure pickup, the second differential pressure pickup, flow sensor and the adjustable needle valve of aperture of master bar are held,
The both ends of the fixture are respectively equipped with the first air inlet and air outlet, and side is equipped with the second air inlet, the first air inlet with
Needle valve is connected, and the second air inlet is connected with the flow sensor, the gas outlet of the fixture and quantitative negative pressure device
Air entry be connected, first differential pressure pickup is connected in parallel at the gas outlet of fixture, and second differential pressure pickup is in parallel
Between the first air inlet and the second air inlet.
The quantitative negative pressure device includes vacuum generator, sonic nozzle and filtering pressure regulator valve, the vacuum generator
Positive pressure side is connect with filtering pressure regulator valve, the sonic nozzle gas outlet and the negative press bond of vacuum generator, and the fixture goes out
Port is connected with sonic nozzle air entry.
The master bar is cylindrical structure comprising air inlet end face, outlet end face, external cylindrical surface, total capilar bore pass through
It is through between outlet end face and air inlet end face, external cylindrical surface is equipped with ventilation capilar bore by near outgassing end face position, capillary of divulging information
Pore connects with total capilar bore.
The flow sensor is volume type flow sensor, and accuracy is not less than 0.5 grade, subsidiary gas temperature, big
Air pressure force measuring device.
The accuracy of first differential pressure pickup and the second differential pressure pickup is not less than 0.1 grade.
A kind of master bar ventilation rate calibration method, comprising the following steps:
S1: total flow measurement, in the case of not installing its needle-like valve opening of master bar is 0, pressure-stabilized air source enters filtering
Pressure regulator valve, the pressure-stabilized air source pressure are not less than 0.7MPa.
Compressed air after pressure regulation generates negative pressure under the action of vacuum generator；Negative pressure air flows through fixed-size
After sonic nozzle, getter action is generated, occurs constant flow rate at the air entry of sonic nozzle, the constant flow rate is
17.5mL/s。
Flow sensor measurements are its outlet side surface current when the steady flow magnitude of sonic nozzle and master bar are calibrated
Total flow value out records the flow value Q of volume type flow sensor at this time1, gas temperature T1, atmospheric pressure P1；
S2: master bar is installed in fixture, and ventilation capilar bore corresponds to the second air inlet of fixture, fixture it is close
The external cylindrical surface of inner wall and master bar at first air inlet seals；
S3: vent flow measurement, the gas flow at sonic nozzle air entry be still with constant flow rate identical in S1,
In the aspiration procedure of constant flow rate, gas enters from the inlet end surface current of needle valve, master bar all the way, and another way gas is passed through flow
The ventilation capillary exit of sensor and master bar flows into, the pressure at the first differential pressure pickup measurement standard stick outlet side face flowexit
Power, the second differential pressure pickup measure the pressure difference of needle-like valve outlet and flow sensor outlet；Flow sensor is in measurement standard stick
Vent flow when, its own existing intrinsic pressure drop changes the practical vent flow of ventilation rate master bar, therefore, by
The traffic ingress of ventilation rate master bar air inlet end face is connected the needle valve of adjustable resistance value, the pressure drop that balanced flow sensor introduces；
In master bar vent flow measurement process, the opening size of needle valve is constantly regulate, when the second differential pressure pickup
When indicating value is zero, the flow value Q of flow sensor is recorded2, gas temperature T2, atmospheric pressure T2And first differential pressure pickup pressure
Force value PD；
S4: flow correction, environment temperature when ventilation rate master bar is calibrated are T, itself pressure drop of volume type flow sensor
For PV, need to total flow Q to ventilation rate master bar1, vent flow Q2Amendment；
Revised total flow Q is as follows,
Revised vent flow QVIt is as follows,
S5: calculating ventilation rate, and the ventilation rate V of master bar is as follows,
Beneficial effects of the present invention: the present invention, as standard, has automatic reading and stream using volume type flow sensor
Debugging functions are measured, the human error of naked eyes reading introducing is eliminated；The test air for flowing through ventilation rate master bar is dry air, with
Ventilation rate master bar actual working state is identical；Using needle valve, volume type flow sensor bring pressure difference is compensated.This calibration
Device has the advantages that accuracy is big, high-efficient, labor intensity is low etc..
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment；
Fig. 2 is structure chart when total flow measures；
Fig. 3 is ventilation rate master bar structural schematic diagram；
Fig. 4 is ventilation rate master bar section enlarged diagram；
In figure: 1, filtering pressure regulator valve, 2, vacuum generator, 3, sonic nozzle, the 4, first differential pressure pick-up, 5, fixture, 6,
Master bar, 7, flow sensor, the 8, second differential pressure pick-up, 9, needle valve, 10, external cylindrical surface, 11, outlet end face, 12, air inlet
End face, 13, total capilar bore, 14, ventilation capilar bore.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Please refer to Fig. 1.Structure, ratio, size depicted in this specification institute attached drawing etc., only to cooperate specification institute
The content of announcement is not intended to limit the invention enforceable qualifications so that those skilled in the art understands and reads,
Therefore not having technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing this hair
Under bright the effect of can be generated and the purpose that can reach, the model that disclosed technology contents can be covered should all be still fallen in
In enclosing.Meanwhile cited such as "upper" in this specification, "lower", "left", "right", " centre " and " one " term, be also only
Convenient for being illustrated for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in no essence
It changes under technology contents, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, arrow is the mark of gas flow direction in figure；A kind of compensation ventilation rate master bar calibrating installation
Including generating the quantitative negative pressure device of constant negative pressure air-flow, the fixture 5 for clamping master bar 6, the first differential pressure pickup 4, second pressure
Gap sensor 8, flow sensor 7 and the adjustable needle valve 9 of aperture, first differential pressure pickup 4 and the second pressure difference sensing
The accuracy of device 8 is not less than 0.1 grade.The flow sensor 7 is volume type flow sensor 7, and accuracy is not less than 0.5
Grade, subsidiary gas temperature, atmospheric pressure measurement device.
The both ends of the fixture 5 are respectively equipped with the first air inlet 51 and gas outlet, and side is equipped with the second air inlet 52,
First air inlet 51 is connected with needle valve 9, and the second air inlet 52 is connected with the flow sensor 7.
The gas outlet of the fixture 5 is connected with the air entry of quantitative negative pressure device, and first differential pressure pickup 4 is in parallel
At the gas outlet of fixture 5, second differential pressure pickup 8 is connected in parallel between the first air inlet 51 and the second air inlet 52.The
When two differential pressure pickups 8 are shown as zero, the flow value of flow sensor 7 can be read.
The quantitative negative pressure device includes that vacuum generator 2, sonic nozzle 3 and filtering pressure regulator valve 1, the vacuum occur
The positive pressure side of device 2 is connect with filtering pressure regulator valve 1,3 gas outlet of sonic nozzle and the negative press bond of vacuum generator 2, the folder
The gas outlet of tool 5 is connected with 3 air entry of sonic nozzle.
As shown in Figure 3, Figure 4, the master bar 6 is cylindrical structure comprising air inlet end face 12, outlet end face 11, outer
Cylindrical surface 10, for total capilar bore 13 through between outlet end face 11 and air inlet end face 12, external cylindrical surface 10 leans near outgassing end face
11 positions are equipped with ventilation capilar bore 14, and ventilation capilar bore 14 connects with total capilar bore 13.
In 6 course of work of master bar, test air is flowed into from ventilation capilar bore 14 and air inlet end face 12, and two-way air converges
It is flowed out after poly- from total capilar bore 13 of outlet end face 11.The air mass flow and total capilar bore 13 that ventilation capilar bore 14 flows into
The ratio between air mass flow of outflow is the ventilation rate of master bar 6.6 ventilation rate magnitude range of master bar is 0~100%, is usually made
Magnitude is 20%, 50%, 80%.
A kind of master bar ventilation rate calibration method, comprising the following steps:
S1: as shown in Fig. 2, arrow is the mark of gas flow direction in figure；Total flow measurement, is not installing master bar 6
In the case that its 9 aperture of needle valve is 0, pressure-stabilized air source enters filtering pressure regulator valve 1, and the pressure-stabilized air source pressure is not less than
0.7MPa。
Compressed air after pressure regulation generates negative pressure under the action of vacuum generator 2；Negative pressure air flows through fixed-size
After sonic nozzle 3, getter action is generated, occurs constant flow rate at the air entry of sonic nozzle 3, the constant flow rate is
17.5mL/s。
7 measured value of flow sensor is its outlet side when the steady flow magnitude of sonic nozzle 3 and master bar 6 are calibrated
The total flow value that face 11 is flowed out records the flow value Q of volume type flow sensor 7 at this time1, gas temperature T1, atmospheric pressure P1；
S2: master bar 6 is installed in fixture 5, the second air inlet 52 of the corresponding fixture 5 of ventilation capilar bore 14, fixture 5
The first close air inlet 51 at inner wall and master bar 6 external cylindrical surface 10 seal；
S3: as shown in Figure 1, vent flow measures, the gas flow at 3 air entry of sonic nozzle be still with it is identical in S1
Constant flow rate, in the aspiration procedure of constant flow rate, gas is flowed into from the air inlet end face 12 of needle valve 9, master bar 6 all the way, separately
Gas is flowed into through the ventilation capillary exit of flow sensor 7 and master bar 6 all the way, and 4 measurement standard stick 6 of the first differential pressure pickup goes out
Pressure at 11 flowexit of gas end face, the second differential pressure pickup 8 measure the pressure that the outlet of needle valve 9 is exported with flow sensor 7
Difference；For flow sensor 7 in the vent flow of measurement standard stick 6, its own existing intrinsic pressure drop changes ventilation rate standard
Therefore the practical vent flow of stick 6 is connected adjustable resistance value by the traffic ingress in 6 air inlet end face 12 of ventilation rate master bar
Needle valve 9, the pressure drop that balanced flow sensor 7 introduces；
In 6 vent flow measurement process of master bar, the opening size of needle valve 9 is constantly regulate, when the second pressure difference sensing
When 8 indicating value of device is zero, the flow value Q of flow sensor 7 is recorded2, gas temperature T2, atmospheric pressure T2And first differential pressure pickup 4
Pressure value PD；
S4: flow correction, environment temperature when ventilation rate master bar 6 is calibrated are T, volume type flow sensor 7 itself pressure
It is reduced to PV, need to total flow Q to ventilation rate master bar 61, vent flow Q2Amendment；
Revised total flow Q is as follows,
Revised vent flow QVIt is as follows,
S5: calculating ventilation rate, and the ventilation rate V of master bar 6 is as follows,
The calibrating installation and calibration method use volume type flow sensor 7 to be used as standard, have automatic reading and flow
Debugging functions eliminate the human error of naked eyes reading introducing；The test air for flowing through ventilation rate master bar 6 is dry air, with
6 actual working state of ventilation rate master bar is identical；Using needle valve 9,7 bring pressure difference of volume type flow sensor is compensated.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of compensation ventilation rate master bar calibrating installation, it is characterised in that: including generating the quantitative negative of constant negative pressure air-flow
Pressure device, the fixture for clamping master bar, the first differential pressure pickup, the second differential pressure pickup, flow sensor and aperture are adjustable
Needle valve, the both ends of the fixture are respectively equipped with the first air inlet and air outlet, and side is equipped with the second air inlet, first
Air inlet is connected with needle valve, and the second air inlet is connected with the flow sensor, the gas outlet of the fixture and quantitative
The air entry of negative pressure device is connected, and first differential pressure pickup is connected in parallel at the gas outlet of fixture, and second pressure difference passes
Sensor is connected in parallel between the first air inlet and the second air inlet.
2. seeking the 1 compensation ventilation rate master bar calibrating installation according to right, it is characterised in that: the quantitative negative pressure device packet
Vacuum generator, sonic nozzle and filtering pressure regulator valve are included, the positive pressure side of vacuum generator is connect with filtering pressure regulator valve, described
The gas outlet of sonic nozzle and the negative press bond of vacuum generator, the gas outlet of the fixture is connected with the air entry of sonic nozzle
It connects.
3. seeking the 1 compensation ventilation rate master bar calibrating installation according to right, it is characterised in that: the master bar is cylindrical body
Structure comprising air inlet end face, outlet end face, external cylindrical surface, total capilar bore inside master bar through outlet end face and
Between air inlet end face, external cylindrical surface is equipped with ventilation capilar bore, ventilation capilar bore and total capillary by near outgassing end face position
Hole connects.
4. seeking the 1 compensation ventilation rate master bar calibrating installation according to right, it is characterised in that: the flow sensor is body
Product formula flow sensor, accuracy are not less than 0.5 grade, subsidiary gas temperature, atmospheric pressure measurement device.
5. seeking the 1 compensation ventilation rate master bar calibrating installation according to right, it is characterised in that: first differential pressure pickup
Accuracy with the second differential pressure pickup is not less than 0.1 grade.
6. a kind of master bar ventilation rate calibration method based on any calibrating installation of claim 1 to 5, which is characterized in that
The following steps are included:
S1: total flow measurement, do not install its needle-like valve opening of master bar be 0 in the case of, pressure-stabilized air source enters filtering pressure regulator valve,
Compressed air after pressure regulation generates negative pressure under the action of vacuum generator；Negative pressure air flows through fixed-size sonic nozzle
Afterwards, getter action is generated, occurs constant flow rate at the air entry of sonic nozzle, flow sensor measurements are sonic nozzle
Steady flow magnitude and the master bar total flow value that its outlet side surface current goes out when calibrating, record volume type flow sensing at this time
The flow value Q of device1, gas temperature T1, atmospheric pressure P1；
S2: master bar is installed in fixture, and ventilation capilar bore corresponds to the second air inlet of fixture, close first of fixture
The external cylindrical surface of inner wall and master bar at air inlet seals；
S3: vent flow measurement, the gas flow at sonic nozzle air entry be still with constant flow rate identical in S1, constant
In the aspiration procedure of flow, gas enters from the inlet end surface current of needle valve, master bar all the way, and another way gas is through flow sensor
It is flowed into the ventilation capillary exit of master bar, the pressure at the first differential pressure pickup measurement standard stick outlet side face flowexit,
The pressure difference of second differential pressure pickup measurement needle-like valve outlet and flow sensor outlet；In master bar vent flow measurement process
In, the opening size of needle valve is constantly regulate, when the second differential pressure pickup indicating value is zero, records the flow value of flow sensor
Q2, gas temperature T2, atmospheric pressure T2And first differential pressure pickup pressure value PD；
S4: flow correction, environment temperature when ventilation rate master bar is calibrated are T, itself pressure drop of volume type flow sensor is PV,
It need to total flow Q to ventilation rate master bar1, vent flow Q2Amendment；
Revised total flow Q is as follows,
Revised vent flow QVIt is as follows,
S5: calculating ventilation rate, and the ventilation rate V of master bar is as follows,
7. master bar ventilation rate calibration method according to claim 6, it is characterised in that: pressure-stabilized air source pressure described in S1
Not less than 0.7MPa.
8. master bar ventilation rate calibration method according to claim 6, it is characterised in that: constant flow rate described in S1 is
17.5mL/s。
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| CN201811081442.8A CN109238936B (en) | 2018-09-17 | 2018-09-17 | Compensation type ventilation rate standard rod calibration device and calibration method thereof |
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| CN201811081442.8A CN109238936B (en) | 2018-09-17 | 2018-09-17 | Compensation type ventilation rate standard rod calibration device and calibration method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595979A (en) * | 2019-09-09 | 2019-12-20 | 河南中烟工业有限责任公司 | Constant flow based dynamic filter tip ventilation rate detection method |
| CN112229456A (en) * | 2020-10-13 | 2021-01-15 | 中国烟草总公司郑州烟草研究院 | Multifunctional airflow distribution standard component |
| CN112369654A (en) * | 2020-10-29 | 2021-02-19 | 中国烟草总公司郑州烟草研究院 | Method for eliminating system pressure difference of cigarette ventilation rate detection device |
| CN113156050A (en) * | 2021-05-12 | 2021-07-23 | 中国烟草总公司郑州烟草研究院 | System and method for evaluating cigar rolling uniformity |
| CN114264340A (en) * | 2020-09-15 | 2022-04-01 | 中国烟草总公司郑州烟草研究院 | Standard rod ventilation rate calibration device and standard rod ventilation rate calibration method |
| CN114264341A (en) * | 2020-09-15 | 2022-04-01 | 中国烟草总公司郑州烟草研究院 | Standard rod ventilation rate detection device and standard rod ventilation rate detection method |
| CN114923830A (en) * | 2022-05-20 | 2022-08-19 | 中国烟草总公司郑州烟草研究院 | Ventilation rate standard component detection system and detection method |
| CN115235963A (en) * | 2022-05-25 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Self-correcting linear air suction type smoke detector |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595979A (en) * | 2019-09-09 | 2019-12-20 | 河南中烟工业有限责任公司 | Constant flow based dynamic filter tip ventilation rate detection method |
| CN114264340A (en) * | 2020-09-15 | 2022-04-01 | 中国烟草总公司郑州烟草研究院 | Standard rod ventilation rate calibration device and standard rod ventilation rate calibration method |
| CN114264341A (en) * | 2020-09-15 | 2022-04-01 | 中国烟草总公司郑州烟草研究院 | Standard rod ventilation rate detection device and standard rod ventilation rate detection method |
| CN112229456A (en) * | 2020-10-13 | 2021-01-15 | 中国烟草总公司郑州烟草研究院 | Multifunctional airflow distribution standard component |
| CN112369654A (en) * | 2020-10-29 | 2021-02-19 | 中国烟草总公司郑州烟草研究院 | Method for eliminating system pressure difference of cigarette ventilation rate detection device |
| CN112369654B (en) * | 2020-10-29 | 2022-01-25 | 中国烟草总公司郑州烟草研究院 | Differential pressure compensation elimination method of cigarette ventilation rate detection device |
| CN113156050A (en) * | 2021-05-12 | 2021-07-23 | 中国烟草总公司郑州烟草研究院 | System and method for evaluating cigar rolling uniformity |
| CN114923830A (en) * | 2022-05-20 | 2022-08-19 | 中国烟草总公司郑州烟草研究院 | Ventilation rate standard component detection system and detection method |
| CN115235963A (en) * | 2022-05-25 | 2022-10-25 | 中国船舶重工集团公司第七0三研究所 | Self-correcting linear air suction type smoke detector |
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