CN111122776A - Gas distribution method for gas sensor test - Google Patents
Gas distribution method for gas sensor test Download PDFInfo
- Publication number
- CN111122776A CN111122776A CN201911285639.8A CN201911285639A CN111122776A CN 111122776 A CN111122776 A CN 111122776A CN 201911285639 A CN201911285639 A CN 201911285639A CN 111122776 A CN111122776 A CN 111122776A
- Authority
- CN
- China
- Prior art keywords
- gas
- gases
- test
- mixed
- reynolds
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 111
- 231100000331 toxic Toxicity 0.000 claims abstract description 14
- 230000002588 toxic effect Effects 0.000 claims abstract description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 56
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 16
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 4
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 11
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- BCDGQXUMWHRQCB-UHFFFAOYSA-N glycine methyl ketone Natural products CC(=O)CN BCDGQXUMWHRQCB-UHFFFAOYSA-N 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/007—Arrangements to check the analyser
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2111—Flow rate
-
- G01N33/0072—
Abstract
The invention discloses a gas distribution method for testing a gas sensor, and relates to the technical field of gas testing. The method aims to solve the problems that when the performance of a gas sensor on toxic and harmful gases is detected, the liquid injection method is adopted, so that the liquid taking amount is inaccurate, the test result is inaccurate, and the test cannot be performed when the concentration of part of the gases is ppb or ppt level. The technical scheme mainly comprises the following steps: s100, taking at least two gas cylinders with different gases, and controlling the output of the gases through a flowmeter; s200, introducing various different gases into a Reynolds tube to be mixed, wherein the gases are in a turbulent flow state in the tube; and S300, injecting the mixed gas in the Reynolds pipe into the test box through the flowmeter. The gas flow rate is controlled by the flowmeter, so that the gas concentration of ppb level or even ppt level can be tested, the gas is uniformly mixed when entering the test box through the Reynolds pipe, the process from liquid to gas and the difference of sampling errors of operators are avoided, and the test is more accurate and precise.
Description
Technical Field
The invention relates to the technical field of gas testing, in particular to a gas distribution method for testing a gas sensor.
Background
With the social development and the continuous improvement of the requirements of people on the quality of life, the requirements on the toxic and harmful gases emitted in life are stricter. For example, acetone is widely used in the production of plastics, rubber, fiber, leather, grease, paint, etc., and has a strong stimulation effect on the respiratory tract of human body, and also has many harmful gases in life, such as ammonia gas, formaldehyde, hydrogen sulfide, etc.
When the gas sensor is used for detecting the performance of volatile toxic and harmful gas which is liquid at normal temperature in the prior production, a certain amount of liquid is taken by a micro-injector and injected onto a heating table in a box body, and the concentration of the gas to be detected in the box body is controlled by controlling the amount of the liquid.
However, sometimes the concentration is less than 10ppm, the amount of liquid taken out by the micro-syringe is too small to be taken out and diluted by adding deionized water, which causes the humidity in the box to change during the test. Some toxic and harmful gases cannot be dissolved in deionized water in a liquid state, so that ppb level cannot be tested, or too little liquid is taken out inaccurately, so that the test result is inaccurate or not strict. Meanwhile, by adopting an injection method, the liquid taking amount is different due to the visual error of naked eyes among people, so that the concentration of gas in the box body is different, and the response value of the test among different detection people under the same concentration is different.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a gas distribution method for testing a gas sensor, which controls the flow of gas through a flowmeter, can test the ppb-level gas concentration, and ensures that the gas enters a test box through a Reynolds pipe to be in a uniformly mixed gas state, thereby avoiding the process from liquid to gas and the difference of sampling errors of operators, and further ensuring more accurate and precise test.
In order to achieve the purpose, the invention provides the following technical scheme:
a gas distribution method for testing a gas sensor comprises the following steps:
s100, taking at least two gas cylinders with different gases, and controlling the output of the gases through a flowmeter;
s200, introducing various different gases into a Reynolds tube for mixing, wherein the gases are in a turbulent flow state in the tube;
and S300, injecting the mixed gas in the Reynolds pipe into the test box through the flowmeter.
Further, in step S100, the gas includes air and toxic and harmful gas.
Further, in step S200, air may be mixed with one or more toxic and harmful gases, or a plurality of toxic and harmful gases may be mixed.
Further, the toxic and harmful gases include acetone, hydrogen sulfide, ammonia gas, formaldehyde, alcohol and triethylamine.
In conclusion, the invention has the following beneficial effects:
1. the Reynolds tube is used as a gas mixing device, and because the Reynolds coefficients of different gases are similar, the gases are in a turbulent flow state in the tube according to the types and the flow rate of the gases, so that the gases are mixed more uniformly;
2. the flow meter is adopted to control the outflow of the gas, so that the low concentration test is more accurate, the errors caused by different people are avoided, and the errors of the same person in different tests are also avoided;
3. the flow of the gas is controlled by a flowmeter before entering the Reynolds tube, so that the concentration mixing ratio of two or more gases is controlled, and the two or more gases with different proportions can be tested;
4. the gas state that the entering test box was mixed evenly can save the heating process, makes the test more accurate and rigorous.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1:
a gas distribution method for testing a gas sensor comprises the following steps:
s100, opening a compressed air cylinder, adjusting a pressure gauge on the air cylinder to 0.5-10Mpa, enabling air to enter a flow meter through an air outlet pipe of the air cylinder, adjusting the flow rate of the air to 0.1-300sccm, and enabling the air to enter a Reynolds pipe through an air outlet pipe of the flow meter.
S200, opening an acetone gas cylinder, adjusting a pressure gauge on the gas cylinder to 0.1-5Mpa, enabling acetone gas to enter a flowmeter through a gas cylinder gas outlet pipe, enabling the flow rate of an adjuster to be 0.01-100sccm, and enabling the acetone gas to enter a Reynolds pipe through a gas outlet pipe of the flowmeter.
S300, air and acetone gas are in a turbulent flow state in the Reynolds tube and are fully mixed, the mixed acetone gas from the Reynolds tube enters a flow meter, and the flow rate of the flow meter is adjusted to be 0.1-300 sccm; and the mixed acetone gas enters the test box through the gas outlet pipe of the flowmeter, and the time for the gas to enter the test box is adjusted to be 1-300s to control the concentration of the acetone gas entering the test box.
Wherein, the concentration of acetone at ppb or ppt level is tested, the flow rate of a flow meter of an air cylinder is adjusted to be 1-300sccm, the flow rate of a flow meter of the acetone is adjusted to be 0.01-50sccm, the ratio of the two is 3000:1, 100:1 or 50:1, and the like, and the concentration of the acetone is enabled to reach the ppb or ppt level.
S400, replacing the air cylinder of the acetone with an air cylinder of toxic and harmful gases such as ammonia gas, formaldehyde, alcohol or triethylamine and the like, and detecting the concentration of the single gas from ppm to ppt.
Example 2:
a gas distribution method for testing a gas sensor comprises the following steps:
s100, opening an acetone gas cylinder, adjusting a pressure gauge on the gas cylinder to 0.5-10Mpa, enabling the acetone to enter a flow meter through a gas outlet pipe of the gas cylinder, adjusting the flow rate of the acetone to 0.01-100sccm, and enabling the acetone to enter a Reynolds pipe through a gas outlet pipe of the flow meter.
S200, opening an ammonia gas cylinder, adjusting a pressure gauge on the gas cylinder to 0.1-5Mpa, enabling the ammonia gas to enter a flow meter through a gas cylinder gas outlet pipe, enabling the flow rate of a regulator to be 0.01-100sccm, and enabling the ammonia gas to enter a Reynolds pipe through a gas outlet pipe of the flow meter.
S300, enabling the acetone and the ammonia gas to be in a turbulent flow state in the Reynolds tube, fully mixing the acetone and the ammonia gas, enabling the mixed acetone and ammonia gas to enter a flow meter from the Reynolds tube, and adjusting the flow rate of the flow meter to be 0.1-300 sccm; and the mixed acetone and ammonia gas enter the test box through an air outlet pipe of the flowmeter, and the time for the gas to enter the test box is adjusted to be 1-300s to control the concentration of the mixed gas entering the test box.
Wherein, the acetone and the ammonia gas with different concentration ratios are tested, and the flow rate ratio of the acetone to the ammonia gas before entering the Reynolds tube is adjusted to be 200:3 or 1:200, and the like.
Testing mixed gas of ppb or ppt level, injecting air, acetone and ammonia gas into a Reynolds tube, and adjusting the flow rate ratio of the air, the acetone and the ammonia gas to 3000:1:3, 200:2:1 or 100:2:3, so that the concentration of the mixed gas reaches the ppb or ppt level.
S400, the acetone and the ammonia gas are changed into acetone and triethylamine or other toxic and harmful gases such as hydrogen sulfide, formaldehyde and alcohol, and different mixed gases are detected.
Claims (4)
1. A gas distribution method for testing a gas sensor is characterized by comprising the following steps:
s100, taking at least two gas cylinders with different gases, and controlling the output of the gases through a flowmeter;
s200, introducing various different gases into a Reynolds tube for mixing, wherein the gases are in a turbulent flow state in the tube;
and S300, injecting the mixed gas in the Reynolds pipe into the test box through the flowmeter.
2. The method of claim 1 for distributing a gas for a gas sensor test, comprising: in step S100, the gas includes air and toxic and harmful gas.
3. A method of distributing a gas for a gas sensor test as claimed in claim 2 wherein: in step S200, the air may be mixed with one or more toxic and harmful gases, or a plurality of toxic and harmful gases may be mixed.
4. A method of distributing a gas for a gas sensor test as claimed in claim 2 wherein: the toxic and harmful gases comprise acetone, hydrogen sulfide, ammonia gas, formaldehyde, alcohol and triethylamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911285639.8A CN111122776A (en) | 2019-12-13 | 2019-12-13 | Gas distribution method for gas sensor test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911285639.8A CN111122776A (en) | 2019-12-13 | 2019-12-13 | Gas distribution method for gas sensor test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111122776A true CN111122776A (en) | 2020-05-08 |
Family
ID=70498810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911285639.8A Pending CN111122776A (en) | 2019-12-13 | 2019-12-13 | Gas distribution method for gas sensor test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111122776A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115696A (en) * | 2015-09-06 | 2015-12-02 | 武汉工程大学 | Multi-functional fluid mechanics experimental apparatus |
| CN205508220U (en) * | 2015-12-29 | 2016-08-24 | 山东科技大学 | Novel reynolds experiment platform |
-
2019
- 2019-12-13 CN CN201911285639.8A patent/CN111122776A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115696A (en) * | 2015-09-06 | 2015-12-02 | 武汉工程大学 | Multi-functional fluid mechanics experimental apparatus |
| CN205508220U (en) * | 2015-12-29 | 2016-08-24 | 山东科技大学 | Novel reynolds experiment platform |
Non-Patent Citations (2)
| Title |
|---|
| 于涤尘 等: "《超变函数论基础》", 30 June 2017 * |
| 马宏伟等: "高精度气敏特性动态测试装置的设计与实现", 《自动化仪表》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107389272B (en) | SO (SO) 3 Standard gas generating device and calibration method | |
| CN103175589A (en) | Measuring meter calibration device and method | |
| CN113358174B (en) | Space free volume measuring method | |
| CN107192791A (en) | A kind of gas analyzing apparatus and method | |
| CN203941133U (en) | Ammonia content on-line monitoring system in a kind of boiler water of electric power plant | |
| US11320335B2 (en) | Systems and methods for testing gas leak detectors | |
| WO2008080948A2 (en) | Method for operating a rebreather | |
| CN203798572U (en) | Engine emission calibration device | |
| CN101839813B (en) | Device for indirectly testing one-time purification efficiency of air purifying component and method thereof | |
| CN111122776A (en) | Gas distribution method for gas sensor test | |
| CN106093313B (en) | The silica of nuclear power station water filter filter core separates out the detection method and its dedicated test system of performance | |
| CN104122122B (en) | Pressure stability sampling apparatus | |
| CN214252216U (en) | Pump suction type gas detector calibrating device | |
| CN100590394C (en) | Device for detecting narcosis gas output quantity | |
| US5996394A (en) | Gas meter calibration device for hydrogen-oxygen mixtures | |
| CN109945953A (en) | A kind of flow sensor method of calibration of equal flows PID control | |
| CN111044681A (en) | Normal-pressure evaluation device and method for liquid desulfurizer | |
| CN106501202A (en) | A kind of transmission method of normal concentration ozone | |
| CN212621747U (en) | VOCs preliminary treatment and detecting system | |
| CN204241492U (en) | Alcohol content of exhalation gas detector calibrating installation | |
| CN110646561B (en) | Flow injection method for injecting reagent at fixed time | |
| CN219675940U (en) | Simulation generating device for simulating human body drunk expiration | |
| CN114249415B (en) | Accurate aeration device and method | |
| CN220911137U (en) | Primary standard device quick reversing valve reversing action monitoring system | |
| CN116298125B (en) | Method for online testing NMP pH value |
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 | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Honglin Inventor after: Gu Wen Inventor after: Jing Hua Inventor before: Chen Honglin Inventor before: Gu Wen Inventor before: Jing Hua Inventor before: Zhang Ting |
|
| CB03 | Change of inventor or designer information | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200508 |
|
| WD01 | Invention patent application deemed withdrawn after publication |