CN117470899A - Novel device and method for measuring gas concentration by using thermal conductivity principle sensor - Google Patents
Novel device and method for measuring gas concentration by using thermal conductivity principle sensor Download PDFInfo
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- CN117470899A CN117470899A CN202311398819.3A CN202311398819A CN117470899A CN 117470899 A CN117470899 A CN 117470899A CN 202311398819 A CN202311398819 A CN 202311398819A CN 117470899 A CN117470899 A CN 117470899A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/18—Investigating or analyzing materials by the use of thermal means by investigating thermal conductivity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a novel device and a method for measuring gas concentration by a sensor based on a thermal conductivity principle, which relate to the technical field of gas sensing and comprise a gas analyzer body, a communicating pipe, a sensor, a mounting hole, a sealing reference groove, a sensing measuring groove and a filtering mechanism, wherein the sealing reference groove and the sensing measuring groove are formed in the surface of one side of the gas analyzer body, the sensing measuring groove is positioned on one side of the sealing reference groove, and the sensors are arranged in the sealing reference groove and the sensing measuring groove; the device adopts the heat exchange principle of the thermal conductivity sensor to measure the gas concentration, and purifies the gas to be measured through the filter layer combined by the molecular sieve and the active carbon material in the filter mechanism, so that the measuring precision, accuracy and stability of the instrument can be ensured, meanwhile, the waterproof membrane can prevent liquid leakage, the filter is protected from liquid damage, the reliability and safety of the system are improved, and the device is suitable for various gas concentration measuring occasions and has high precision and reliability.
Description
Technical Field
The invention relates to the technical field of gas sensing, in particular to a device and a method for measuring gas concentration by a novel thermal conductivity principle sensor.
Background
Measuring gas concentration is an important task in the fields of industry, environmental monitoring, medical and safety. A sensor is one of the key elements to achieve gas concentration measurement. The thermal conductivity principle sensor is a commonly used gas concentration measurement technology. The method utilizes the change of the heat conduction property of the gas to heat to indirectly measure the concentration of the gas;
conventional thermal conductivity principle sensors typically comprise a thermopile and a hot wire filament for heating and measurement. When gas flows through the filament, it causes the temperature of the filament to change. From the change in the hot wire temperature, the concentration of the gas can be calculated, and conventional thermal conductivity sensors have only a single thermal conductivity sensing channel and cannot be directly compared, and a single channel sensor may not provide sufficiently accurate and precise measurement results because it cannot take into account interference or cross-over effects from other gases. This may lead to measurement errors and reduce the reliability of the comparative analysis, which cannot be directly performed on the concentrations of different gases, since there are no multiple channels to measure. The comparative analysis is very important to understand the trend of the gas composition and the influence of different gases on the production process or environment.
However, in the prior art, the following problems exist in the use process of the sensor:
1. the concentration measurement precision of the traditional sensor for certain gases may not be high enough, and the requirement of accurate measurement for some specific application occasions cannot be met;
2. various impurities, such as suspended particles, pollutants and the like, may exist in the gas to be measured, and the impurities interfere with the measurement result of the sensor, so that accuracy and stability are affected;
3. some gases may contain harmful substances, such as peculiar smell, chemical pollutants and the like, which may not only cause harm to human health, but also cause damage or performance degradation of the sensor;
4. in practical applications, liquid leakage may enter the sensor interior, causing malfunction or shorting of the sensor, and even damaging the entire system.
In summary, a device and a method for measuring gas concentration by using a novel thermal conductivity sensor are designed.
Disclosure of Invention
The invention aims to provide a novel device for measuring gas concentration by using a thermal conductivity principle sensor so as to solve the problems of the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the device comprises a gas analyzer body, a communicating pipe, a sensor, a mounting hole, a sealing reference groove, a sensing measuring groove and a filtering mechanism, wherein the sealing reference groove and the sensing measuring groove are formed in the surface of one side of the gas analyzer body, the sensing measuring groove is positioned on one side of the sealing reference groove, and the sensors are arranged in the sealing reference groove and the sensing measuring groove;
the gas analyzer body surface runs through in the sensing measurement groove upside and has seted up the heat transfer guide slot, and the mounting hole has been seted up to heat transfer groove both sides notch, and the mounting hole surface is the helicitic texture, gas analyzer body upside runs through and has seted up the manhole, is provided with the filter vat in gas analyzer body inside between heat transfer guide slot and the sensing measurement groove, is provided with filtering mechanism in the filter vat, and gas analyzer body upper both sides have run through and have seted up the fixed orifices.
Preferably, the filter mechanism comprises a filter upper cover, a filter base, a filter layer, a waterproof film, a filter hole, a positioning bolt, a mounting piece, a lug and an inner side plate, wherein the filter upper cover is arranged at the notch of the filter tank, the positioning bolt is arranged at the joint of the filter tank and the filter upper cover, the mounting piece is arranged below the filter upper cover, and the lug is arranged inside the two sides of the mounting piece.
Preferably, the filter tank lower notch is provided with the filter base, is provided with the interior side board on the filter base, and the recess has been seted up to interior side board both sides surface, mutually support between lug and the recess.
Preferably, the filter upper cover and the filter base are provided with through grooves in a penetrating way, the surfaces of the through grooves are equidistantly separated from each other to form a plurality of filter holes, a filter layer is arranged between the filter holes and the inner side plate, and a waterproof film is arranged on one side, far away from the filter upper cover, of the through grooves.
Preferably, the filter layer is formed by combining a molecular sieve and an activated carbon material, the waterproof membrane is made of a polymer material, and the filter layer and the waterproof membrane are both detachable components.
Preferably, acrylic acid glue is coated between the sealing reference groove and the sensing measuring groove as well as between the sealing reference groove and the sensing measuring groove and between the sealing reference groove and the sensing measuring groove are coated with acrylic acid glue on the surface of the manhole.
Preferably, a cavity is formed between the sensors in the sealed reference groove, and sealing gas is arranged in the cavity and is oxygen.
A method for measuring gas concentration by a novel thermal conductivity principle sensor comprises the following steps:
s1: the method comprises the steps that a measuring device is prepared, wherein the measuring device comprises a sensor, a gas analyzer body, corresponding connecting pipes and the like, the sensor is arranged in a sensing measuring groove and a sealing reference groove on the gas analyzer body, the sensor is ensured to be fully contacted with the sensing measuring groove and the sealing reference groove, and acrylic glue is coated between the sensing measuring groove and the sealing reference groove and between the sensing measuring groove and the sensor;
s2: introducing the gas to be measured into a sensing measurement groove through a communicating pipe to be contacted with a sensor, and carrying out small-range exchange and linear energy consumption on heat by using a flowing gas structure permeation mode after the sensor receives the gas to be measured;
s3: when the heat conduction groove gas is subjected to heat consumption, the gas enters the sensing measurement groove below through the filtering mechanism, wherein the upper filter cover and the filter base are provided with through grooves in a penetrating way so as to form an air guide channel, the surfaces of the through grooves are equidistantly separated from each other, a filtering layer formed by combining a molecular sieve and an activated carbon material is arranged between the filtering holes and the inner side plate and is used for effectively filtering impurities and harmful substances in the gas to be measured, and a waterproof film is arranged on one side, far away from the upper filter cover, of the through grooves and is used for preventing the gas to be measured from entering other parts and affecting the accuracy and stability of the instrument;
s4: the converted data are input into the gas analyzer body for data processing, the sealed reference groove adopts small-volume sealing gas as reference gas to stop heat exchange and has fixed energy consumption, the concentration of the specific gas is calculated through two groups of consumption modes with different energy, and the concentration value can be displayed through a display screen or other output modes.
Compared with the prior art, the invention has the beneficial effects that:
1. the measuring principle of the device is based on the heat exchange principle of a thermal conductivity sensor, a sensing measuring groove receives gas to be measured through the sensor and carries out heat exchange by utilizing a flowing gas structure permeation mode, so that the specific gas concentration can be calculated, meanwhile, a filtering mechanism adopts a filtering layer formed by combining a molecular sieve and an active carbon material, impurities and harmful substances in the gas to be measured can be effectively filtered, the accuracy and stability of an instrument are ensured, a sealing reference groove adopts small-volume sealing gas as reference gas, the stability is ensured by fixing heat exchange and energy consumption, and the device is high in measuring precision and can be widely applied to various gas concentration measuring occasions.
2. When hydrogen enters the filter tank through the upper cover of the filter, the hydrogen enters the filter holes through the tank, liquid or gas is filtered and purified through the filter layer in the through tank, meanwhile, the waterproof membrane plays a role in preventing liquid leakage, the molecular sieve and the activated carbon material in the filter layer have excellent adsorption capacity and filtering effect, suspended particles, peculiar smell and harmful substances can be effectively removed, clean and healthy fluid is provided, the molecular sieve can adsorb impurities and moisture in the gas, the activated carbon can remove peculiar smell and harmful chemical substances, and therefore, through the functions of the upper cover of the filter and the filter layer, the hydrogen can be purified and filtered before entering the filter tank, so that the hydrogen meets the required purity and quality requirements, meanwhile, the existence of the waterproof membrane can also prevent liquid leakage, and the normal operation and safety of the filter are ensured.
Drawings
FIG. 1 is a schematic perspective view of a novel thermal conductivity sensor device for measuring gas concentration;
FIG. 2 is a schematic diagram of a gas analyzer body of a novel thermal conductivity sensor for measuring gas concentration;
FIG. 3 is a top view of a novel thermal conductivity sensor device for measuring gas concentration in accordance with the present invention;
FIG. 4 is a schematic cross-sectional view of the gas analyzer body of FIG. 3 A-A;
FIG. 5 is a side view of a filtering mechanism of a novel thermal conductivity sensor for measuring gas concentration in accordance with the present invention;
FIG. 6 is a schematic cross-sectional view of the filtering mechanism B-B of FIG. 5;
fig. 7 is a schematic diagram of the internal structure of a filtering mechanism of a novel device for measuring gas concentration by using a sensor based on the principle of thermal conductivity.
In the figure: 1. a gas analyzer body; 2. a communicating pipe; 3. a sensor; 4. a fixing hole; 5. a mounting hole; 6. sealing the reference cell; 7. a sensing measurement tank; 8. a filtering mechanism; 801. a filter upper cover; 802. a filter base; 803. a filter layer; 804. a waterproof membrane; 805. a filter hole; 806. positioning bolts; 807. a mounting member; 808. a bump; 809. an inner side plate; 810. a through groove; 9. a heat transfer channel; 10. a manhole; 11. a filter tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-7: the novel device for measuring the gas concentration by using the heat conduction principle sensor comprises a gas analyzer body 1, a communicating pipe 2, a sensor 3, a mounting hole 5, a sealing reference groove 6, a sensing measurement groove 7 and a filtering mechanism 8, wherein the sealing reference groove 6 and the sensing measurement groove 7 are formed in the surface of one side of the gas analyzer body 1, the sensing measurement groove 7 is positioned on one side of the sealing reference groove 6, and the sensor 3 is arranged in each of the sealing reference groove 6 and the sensing measurement groove 7;
the surface of the gas analyzer body 1 is provided with a heat conduction groove 9 in a penetrating way on the upper side of the sensing measurement groove 7, the notches on two sides of the heat conduction groove 9 are provided with mounting holes 5, the surface of the mounting holes 5 is in a threaded structure, the upper side of the gas analyzer body 1 is provided with a maintenance hole 10 in a penetrating way, a filter groove 11 is arranged in the gas analyzer body 1 between the inside of the heat conduction groove 9 and the sensing measurement groove 7, a filter mechanism 8 is arranged in the filter groove 11, and the two sides on the gas analyzer body 1 are provided with fixing holes 4 in a penetrating way;
the sealing reference groove 6, the sensing measuring groove 7 and the sensor 3 are coated with acrylic acid glue, the surface of the access hole 10 is coated with acrylic acid glue, a cavity is formed between the sensors 3 in the sealing reference groove 6, and sealing gas is arranged in the cavity and is oxygen.
In this embodiment, the measurement principle of the device is based on the heat exchange principle of a thermal conductivity sensor, the sensing measurement groove 7 receives the gas to be measured through the sensor 3 and performs heat exchange by utilizing the permeation mode of the flowing gas structure, so that the specific gas concentration can be calculated, meanwhile, the filtering mechanism 8 adopts the filtering layer 803 formed by combining the molecular sieve and the activated carbon material, impurities and harmful substances in the gas to be measured can be effectively filtered, the accuracy and stability of the instrument are ensured, the sealing reference groove 6 adopts small-volume sealing gas as reference gas, the stability is ensured by fixing the heat exchange and energy consumption, and the device has high measurement precision and can be widely applied to various gas concentration measurement occasions.
Example two
As shown in fig. 1-7, the filtering mechanism 8 comprises a filter upper cover 801, a filter base 802, a filter layer 803, a waterproof membrane 804, a filter hole 805, positioning bolts 806, mounting pieces 807, protruding blocks 808 and an inner side plate 809, wherein the filter upper cover 801 is arranged at the upper notch of the filter tank 11, the positioning bolts 806 are arranged at the joint of the filter tank 11 and the filter upper cover 801, the mounting pieces 807 are arranged below the filter upper cover 801, and the protruding blocks 808 are arranged inside the two sides of the mounting pieces 807;
a filter base 802 is arranged at the lower notch of the filter tank 11, an inner side plate 809 is arranged on the filter base 802, grooves are formed in the surfaces of two sides of the inner side plate 809, and the convex blocks 808 are matched with the grooves;
the filter upper cover 801 and the filter base 802 are provided with through grooves 810 in a penetrating way, the surfaces of the through grooves 810 are equidistantly separated from each other to form a plurality of filter holes 805, a filter layer 803 is arranged between the filter holes 805 and the inner side plate 809, and a waterproof membrane 804 is arranged on one side, far away from the filter upper cover 801, of the through grooves 810;
the filter layer 803 is formed by combining a molecular sieve and an activated carbon material, the waterproof membrane 804 is made of a polymer material, and the filter layer 803 and the waterproof membrane 804 are detachable components.
In this embodiment, when hydrogen gas enters the filter tank 11 through the filter upper cover 801, it enters the filter holes 805 through the tank 810, and in the through tank 810, liquid or gas is filtered and purified by the filter layer 803, and meanwhile, the waterproof membrane 804 plays a role in preventing liquid leakage, and the molecular sieve and activated carbon materials in the filter layer 803 have excellent adsorption capacity and filtering effect, they can effectively remove suspended particles, peculiar smell and harmful substances, provide clean and healthy fluid, the molecular sieve can adsorb impurities and moisture in the gas, and the activated carbon can remove peculiar smell and harmful chemical substances, so that by the functions of the filter upper cover 801 and the filter layer 803, the hydrogen gas can be purified and filtered before entering the filter tank 11, so that it reaches the required purity and quality requirements, and meanwhile, the existence of the waterproof membrane 804 can also avoid liquid leakage, ensuring the normal operation and safety of the filter.
A method for measuring gas concentration by a novel thermal conductivity principle sensor comprises the following steps:
s1: preparing measuring equipment comprising a sensor 3, a gas analyzer body 1, corresponding connecting pipes 2 and the like, and installing the sensor 3 in a sensing measuring groove 7 and a sealing reference groove 6 on the gas analyzer body 1, so as to ensure that the sensor 3 is fully contacted with the sensing measuring groove 7 and the sealing reference groove 6, and acrylic glue is coated between the sensing measuring groove 7 and the sealing reference groove 6 and the sensor 3;
s2: introducing the gas to be measured into a sensing measurement groove 7 through a communicating pipe 2, contacting with a sensor 3, and carrying out small-range exchange and linear energy consumption on heat by using a flowing gas structure permeation mode after the sensor 3 receives the gas to be measured;
s3: when the heat conduction groove 9 is used for heat consumption, the gas enters the lower sensing measurement groove 7 through the filtering mechanism 8, wherein the upper filter cover 801 and the filter base 802 are provided with through grooves 810 in a penetrating way to form an air guide channel, the surfaces of the through grooves 810 are equidistantly separated from each other, a filtering layer 803 formed by combining a molecular sieve and an activated carbon material is arranged between the filtering holes and the inner side plate 809 and is used for effectively filtering impurities and harmful substances in the gas to be tested, and a waterproof film 804 is further arranged on one side, far away from the upper filter cover 801, in the through grooves 810 and is used for preventing the gas to be tested from entering other parts and affecting the accuracy and stability of the instrument;
s4: the converted data are input into the gas analyzer body 1 for data processing, the sealing reference groove 6 adopts small-volume sealing gas as reference gas to stop heat exchange and fix energy consumption, the concentration of specific gas is calculated through two groups of consumption modes with different energy, and the concentration value can be displayed through a display screen or other output modes.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (8)
1. The device and the method for measuring the gas concentration by the novel thermal conductivity principle sensor are characterized by comprising a gas analyzer body (1), a communicating pipe (2), a sensor (3), a mounting hole (5), a sealing reference groove (6), a sensing measurement groove (7) and a filtering mechanism (8), wherein the sealing reference groove (6) and the sensing measurement groove (7) are formed in the surface of one side of the gas analyzer body (1), the sensing measurement groove (7) is positioned on one side of the sealing reference groove (6), and the sensor (3) is arranged in the sealing reference groove (6) and the sensing measurement groove (7);
the gas analyzer body (1) surface runs through in sensing measuring groove (7) upside and has seted up heat conduction groove (9), and mounting hole (5) have been seted up to heat conduction groove (9) both sides notch, and mounting hole (5) surface is screw thread structure, manhole (10) have been seted up in running through of gas analyzer body (1) upside, are provided with filter vat (11) in gas analyzer body (1) inside between heat conduction groove (9) and sensing measuring groove (7), are provided with filtering mechanism (8) in filter vat (11), and gas analyzer body (1) upper both sides have run through and have seted up fixed orifices (4).
2. The device for measuring gas concentration by using the novel thermal conductivity sensor according to claim 1, wherein: the filter mechanism (8) comprises a filter upper cover (801), a filter base (802), a filter layer (803), a waterproof membrane (804), filter holes (805), positioning bolts (806), mounting pieces (807), protruding blocks (808) and an inner side plate (809), wherein the filter upper cover (801) is arranged on an upper notch of the filter tank (11), the positioning bolts (806) are arranged at the joint of the filter tank (11) and the filter upper cover (801), the mounting pieces (807) are arranged below the filter upper cover (801), and the protruding blocks (808) are arranged inside two sides of the mounting pieces (807).
3. The device for measuring gas concentration by using the novel thermal conductivity sensor according to claim 2, wherein: the filter tank is characterized in that a filter base (802) is arranged at the lower notch of the filter tank (11), an inner side plate (809) is arranged on the filter base (802), grooves are formed in the surfaces of two sides of the inner side plate (809), and the protruding blocks (808) are matched with the grooves.
4. The device for measuring gas concentration by using the novel thermal conductivity sensor according to claim 2, wherein: the filter upper cover (801) and the filter base (802) are provided with through grooves (810) in a penetrating mode, a plurality of filtering holes (805) are formed in the surfaces of the through grooves (810) in an equidistant mode, a filtering layer (803) is arranged between the filtering holes (805) and the inner side plate (809), and a waterproof membrane (804) is arranged on one side, far away from the filter upper cover (801), of the through grooves (810).
5. The device for measuring gas concentration by using the novel thermal conductivity sensor according to claim 2, wherein: the filter layer (803) is formed by combining a molecular sieve and an activated carbon material, the waterproof membrane (804) is made of a polymer material, and the filter layer (803) and the waterproof membrane (804) are both detachable components.
6. The device for measuring gas concentration by using the novel thermal conductivity sensor according to claim 1, wherein: acrylic acid glue is coated between the sealing reference groove (6) and the sensing measuring groove (7) and between the sealing reference groove and the sensor (3), and acrylic acid glue is coated on the surface of the overhaul hole (10).
7. The device for measuring gas concentration by using the novel thermal conductivity sensor as claimed in claim 6, wherein: the sealing reference groove (6) is provided with a cavity between the sensors (3), and sealing gas is arranged in the cavity and is oxygen.
8. A method for measuring gas concentration using a novel thermal conductivity sensor according to any one of claims 1-7, comprising the steps of:
s1: the preparation measuring equipment comprises a sensor (3), a gas analyzer body (1), corresponding connecting pipes (2) and the like, wherein the sensor 3 is arranged in a sensing measuring groove (7) and a sealing reference groove (6) on the gas analyzer body (1), so that the sensor (3) is fully contacted with the sensing measuring groove (7) and the sealing reference groove (6), and acrylic glue is coated between the sensing measuring groove (7) and the sealing reference groove (6) and the sensor (3);
s2: introducing gas to be measured into a sensing measurement groove (7) through a communicating pipe (2), contacting with a sensor (3), and carrying out small-range exchange and linear energy consumption on heat by using a flowing gas structure permeation mode after the sensor (3) receives the gas to be measured;
s3: when the heat conduction groove (9) is used for heat consumption, the gas enters the sensing measurement groove (7) below through the filtering mechanism (8), wherein the upper filter cover (801) and the filter base (802) are provided with through grooves (810) in a penetrating way to form an air guide channel, the surfaces of the through grooves (810) are equidistantly separated from each other, a filtering layer (803) formed by combining a molecular sieve and an activated carbon material is arranged between the filtering holes and the inner side plate (809) and is used for effectively filtering impurities and harmful substances in the gas to be tested, and a waterproof film (804) is arranged on one side, far away from the upper filter cover (801), of the through grooves (810) and is used for preventing the gas to be tested from entering other parts and affecting the accuracy and stability of the instrument;
s4: the converted data are input into the gas analyzer body (1) for data processing, the sealing reference groove (6) adopts small-volume sealing gas as reference gas to stop heat exchange and fix energy consumption, the concentration of the specific gas is calculated through two groups of consumption modes with different energy, and the concentration value can be displayed through a display screen or other output modes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311398819.3A CN117470899A (en) | 2023-10-26 | 2023-10-26 | Novel device and method for measuring gas concentration by using thermal conductivity principle sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311398819.3A CN117470899A (en) | 2023-10-26 | 2023-10-26 | Novel device and method for measuring gas concentration by using thermal conductivity principle sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117470899A true CN117470899A (en) | 2024-01-30 |
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| US20100110437A1 (en) * | 2008-11-06 | 2010-05-06 | Li-Cor, Inc. | Gas analyzer |
| CN202854100U (en) * | 2012-10-21 | 2013-04-03 | 甘肃倚银石化装备制造有限公司 | Thermal conductivity detectors of gas chromatographic analyzer |
| CN208902634U (en) * | 2018-10-22 | 2019-05-24 | 洛阳三隆安装检修有限公司 | A kind of system improving heat-conducted hydrogen analyser accuracy of analysis |
| CN211402216U (en) * | 2020-01-04 | 2020-09-01 | 长沙中益气体有限公司 | Thermal conductivity gas analyzer |
| CN215179862U (en) * | 2021-06-30 | 2021-12-14 | 郑州迪邦科技有限公司 | Thermal conductivity type hydrogen purity detection device |
| CN114324229A (en) * | 2022-03-09 | 2022-04-12 | 南京波瑞自动化科技有限公司 | Gas analysis instrument capable of measuring equivalent concentration |
| CN218865765U (en) * | 2022-10-26 | 2023-04-14 | 上海华川环保科技有限公司 | Saturated humidity reference gas device |
| JP2023148209A (en) * | 2022-03-30 | 2023-10-13 | 株式会社チノー | Explosion prevention gas sensor |
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2023
- 2023-10-26 CN CN202311398819.3A patent/CN117470899A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100110437A1 (en) * | 2008-11-06 | 2010-05-06 | Li-Cor, Inc. | Gas analyzer |
| CN202854100U (en) * | 2012-10-21 | 2013-04-03 | 甘肃倚银石化装备制造有限公司 | Thermal conductivity detectors of gas chromatographic analyzer |
| CN208902634U (en) * | 2018-10-22 | 2019-05-24 | 洛阳三隆安装检修有限公司 | A kind of system improving heat-conducted hydrogen analyser accuracy of analysis |
| CN211402216U (en) * | 2020-01-04 | 2020-09-01 | 长沙中益气体有限公司 | Thermal conductivity gas analyzer |
| CN215179862U (en) * | 2021-06-30 | 2021-12-14 | 郑州迪邦科技有限公司 | Thermal conductivity type hydrogen purity detection device |
| CN114324229A (en) * | 2022-03-09 | 2022-04-12 | 南京波瑞自动化科技有限公司 | Gas analysis instrument capable of measuring equivalent concentration |
| JP2023148209A (en) * | 2022-03-30 | 2023-10-13 | 株式会社チノー | Explosion prevention gas sensor |
| CN218865765U (en) * | 2022-10-26 | 2023-04-14 | 上海华川环保科技有限公司 | Saturated humidity reference gas device |
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