CN112379042A - Synchronous test bin for performance of multiple gas sensors - Google Patents
Synchronous test bin for performance of multiple gas sensors Download PDFInfo
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- CN112379042A CN112379042A CN202011017098.3A CN202011017098A CN112379042A CN 112379042 A CN112379042 A CN 112379042A CN 202011017098 A CN202011017098 A CN 202011017098A CN 112379042 A CN112379042 A CN 112379042A
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- 238000012360 testing method Methods 0.000 title claims abstract description 99
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 81
- 239000011521 glass Substances 0.000 claims description 4
- 238000011056 performance test Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002026 carminative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- 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
- G01N33/0006—Calibrating gas analysers
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Abstract
A multi-gas sensor performance synchronous test bin comprises a gas distribution bottle, a three-way control valve, a first air pump, a test bin body and a second air pump; the test bin body is provided with an air inlet part, an air outlet part and a plurality of groups of sensor bases; each group of sensor bases is provided with a test socket for electrically connecting the sensors; the air inlet part is provided with an air inlet hole along the central axis direction thereof for communicating the interior of the test chamber body; the air outlet part is provided with an air outlet hole along the central axis direction thereof for communicating the interior of the test bin body; the air outlet is communicated with the second air pumping cylinder through a third connecting pipe; the air inlet is communicated with the three-way control valve through a second connecting pipe; the three-way control valve is communicated with the gas distribution cylinder through a first connecting pipe and is communicated with the first air suction cylinder; and a temperature sensor, a humidity sensor and a pressure sensor are arranged in the air distribution bottle. The invention realizes the synchronous detection of the performance of a plurality of sensors and has the advantages of simple structure, good synchronism, good controllability, gas saving and short time consumption.
Description
Technical Field
The invention relates to the technical field of synchronous detection of gas sensors, in particular to a synchronous performance test bin for multiple gas sensors.
Background
The performance test of the current gas sensor mainly adopts two methods, namely a static test and a dynamic test; static test is generally adopted by institutions such as universities and research institutes due to simple system and small gas consumption, but the test box of the current static test system generally has the problems of large volume, long ventilation time, unclean ventilation and the like;
for example: in a static test gas sensor system of university, a test box is a closed box body with the volume;
in the research of response time of a gas sensor based on an STM32 acquisition platform, the volume of a test box of the university of Anhui science and engineering is 10L;
in a metal oxide semiconductor gas sensor test system adopted by the university of Hunan, the volume of a test box reaches 10L and the like;
the testing box for the existing gas sensor testing system has the defects that the size is large, the gas concentration cannot be ensured to be consistent, the experimental error is large and the like, and the multi-gas sensor performance synchronous testing bin is provided in the application.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides a synchronous testing bin for the performance of multiple gas sensors, which realizes synchronous detection of the performance of the multiple sensors and has the advantages of simple structure, good synchronism, good controllability, gas saving and short time consumption.
(II) technical scheme
In order to solve the problems, the invention provides a multi-gas sensor performance synchronous testing bin which comprises a gas distribution bottle, a first connecting pipe, a three-way control valve, a first air pumping cylinder, a second connecting pipe, a testing bin body, a third connecting pipe and a second air pumping cylinder;
the test bin body is provided with an air inlet part, an air outlet part and a plurality of groups of sensor bases; each group of sensor bases is provided with a test socket for electrically connecting the sensors; the air inlet part is provided with an air inlet hole along the central axis direction thereof for communicating the interior of the test chamber body; the air outlet part is provided with an air outlet hole along the central axis direction thereof for communicating the interior of the test bin body;
a pipe orifice at one end of the third connecting pipe is connected with the air outlet, and a pipe orifice at the other end of the third connecting pipe is connected with an air exhaust port of the second air exhaust cylinder;
a pipe orifice at one end of the second connecting pipe is connected with the air inlet, and a pipe orifice at the other end of the second connecting pipe is connected with a first port of the three-way control valve;
the air exhaust port of the first air exhaust cylinder is connected with the second port of the three-way control valve;
a pipe orifice at one end of the first connecting pipe is connected with a third port of the three-way control valve, and a pipe orifice at the other end of the first connecting pipe is connected with an air outlet port of a gas distribution bottle for storing detection gases with different concentrations; and a temperature sensor, a humidity sensor and a pressure sensor are arranged in the air distribution bottle.
Preferably, the maximum range of the first air pumping cylinder and the second air pumping cylinder is 150 ml.
Preferably, the test chamber body, the air inlet part and the air outlet part are of an integrated structure.
Preferably, the air inlet part and the air outlet part are respectively positioned at two ends of the test bin body, which are far away from each other; the multiple groups of sensor bases are positioned between the air inlet part and the air outlet part at equal intervals.
Preferably, the air inlet part and the air outlet part have the same structure, and the air inlet part and the air outlet part are symmetrically distributed by taking the central axis of the test chamber body as the center.
Preferably, the air intake part includes a first connection part and a second connection part;
the first connecting part is of a cylindrical structure, one end of the first connecting part is connected with the test bin body, and the other end of the first connecting part is connected with the second connecting part; the diameter value of the second connecting portion and the pressing end face of the first connecting portion is larger than the outer diameter value of the first connecting portion, and the outer diameter value of the second connecting portion along the direction of the central axis of the second connecting portion is gradually reduced towards the direction far away from the first connecting portion.
Preferably, the sensor bases are made of rubber materials; wherein, a plurality of groups of mounting holes are arranged on the test bin body;
the multiple groups of sensor bases are respectively inserted into the multiple groups of mounting holes in an interference fit manner one by one.
Preferably, the test chamber body is made of organic glass materials.
The technical scheme of the invention has the following beneficial technical effects:
when the gas distribution cylinder is used, a semiconductor gas sensor, a combustible catalytic gas sensor and a thermal conductivity sensor which are arranged on a sensor base, and a temperature sensor, a humidity sensor and a pressure sensor in the gas distribution cylinder are electrified and operated for a period of time, and the parameter values of the sensors are recorded as initial records; exhausting air in the test bin body and the pipelines; gas with specified concentration is configured in the gas distribution bottle; controlling a three-way control valve to enable a gas distribution bottle to be communicated with a first air pump, pumping Vml gas from the gas distribution bottle by using the first air pump, controlling the three-way control valve to close the connecting channel, controlling the three-way control valve to be communicated with the first air pump and a test bin body, pumping the gas in the test bin body by using a second air pump, gradually introducing the Vml test gas in the first air pump into the test bin body, and simultaneously sensing the change of the gas by using a semiconductor gas sensor, a combustible catalytic gas sensor and a thermal conductivity sensor in the test bin body and sending the data obtained by the test to a precision test instrument for analysis and storage in the flowing process of the test gas; when the first air pumping cylinder injects the test gas into the test chamber body, the concentration of the injected gas is changed by changing the volume of the injected test gas, so that the operation is simple, the use is convenient, the three sensors can synchronously react, the experimental time is effectively shortened, the contrast of the sensors is improved, and the test chamber has the advantages of simple structure, good synchronism, gas saving and good controllability.
Drawings
Fig. 1 is a schematic structural diagram of a synchronous testing chamber for performance of multiple gas sensors according to the present invention.
Fig. 2 is a schematic structural diagram of an air inlet portion in a multi-gas sensor performance synchronization test chamber according to the present invention.
Reference numerals: 1. gas distribution bottles are arranged; 2. a first connecting pipe; 3. a three-way control valve; 4. a first pump cylinder; 5. a second connecting pipe; 6. a test chamber body; 7. a sensor base; 8. a third connecting pipe; 9. a second pump cylinder; 61. an air intake portion; 611. a first connection portion; 612. a second connecting portion; 62. an air outlet part.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, the synchronous testing bin for the performance of multiple gas sensors provided by the invention comprises a gas distribution bottle 1, a first connecting pipe 2, a three-way control valve 3, a first pumping cylinder 4, a second connecting pipe 5, a testing bin body 6, a third connecting pipe 8 and a second pumping cylinder 9;
the test chamber body 6 is provided with an air inlet part 61, an air outlet part 62 and a plurality of groups of sensor bases 7; each group of sensor bases 7 is provided with a test socket for electrically connecting the sensors; the three groups of sensor bases 7 are respectively used for installing a semiconductor gas sensor, a combustible catalytic gas sensor and a thermal conductivity sensor in a matching way;
the air inlet part 61 is provided with an air inlet hole along the central axis direction thereof for communicating the interior of the test chamber body 6; the air outlet part 62 is provided with an air outlet hole along the central axis direction thereof for communicating the interior of the test chamber body 6;
a pipe orifice at one end of the third connecting pipe 8 is connected with the air outlet, and a pipe orifice at the other end of the third connecting pipe 8 is connected with an air exhaust port of the second air exhaust cylinder 9;
a pipe orifice at one end of the second connecting pipe 5 is connected with the air inlet, and a pipe orifice at the other end of the second connecting pipe 5 is connected with a first port of the three-way control valve 3;
the air exhaust port of the first air exhaust cylinder 4 is connected with the second port of the three-way control valve 3;
a pipe orifice at one end of the first connecting pipe 2 is connected with a third port of the three-way control valve 3, and a pipe orifice at the other end of the first connecting pipe 2 is connected with an air outlet port of the gas distributing bottle 1 for storing detection gases with different concentrations; a temperature sensor, a humidity sensor and a pressure sensor are arranged in the gas distribution bottle 1.
In the invention, when in use, a semiconductor gas sensor, a combustible catalytic gas sensor and a thermal conductivity sensor arranged on a sensor base 7, and a temperature sensor, a humidity sensor and a pressure sensor in a gas distribution bottle 1 are electrified and operated for a period of time, and the parameter values of the sensors are recorded as initial records; exhausting the air in the test bin body 6 and the pipelines; gas with specified concentration is configured in the gas distribution bottle 1; controlling a three-way control valve 3 to enable a gas distribution bottle 1 to be communicated with a first air pump 4, pumping Vml gas from the gas distribution bottle 1 by using the first air pump 4, controlling the three-way control valve 3 to close the connecting channel, controlling the three-way control valve 3 to be communicated with the first air pump 4 and a test bin body 6, pumping the gas in the test bin body 6 by using a second air pump 9, gradually introducing Vml test gas in the first air pump 4 into the test bin body 6, and in the flowing process of the test gas, simultaneously sensing the change of the gas by three sensors, namely a semiconductor gas sensor, a combustible catalytic gas sensor and a thermal conductivity sensor in the test bin body 6 and sending the data obtained by the test to a precision test instrument for analysis and storage; when the first air pumping cylinder 4 injects the test gas into the test chamber body 6, the concentration of the injected gas is changed by changing the volume of the injected test gas, so that the operation is simple, the use is convenient, the three sensors can synchronously react, the experimental time is effectively shortened, the contrast of the sensors is improved, and the device has the advantages of simple structure, good synchronism, gas saving and good controllability.
In an alternative embodiment, the first pump cylinder 4 and the second pump cylinder 9 each have a maximum range of 150 ml.
In an alternative embodiment, the test chamber body 6, the air inlet portion 61 and the air outlet portion 62 are an integrated structure, so that the sealing performance between the air inlet portion 61 and the air outlet portion 62 and the test chamber body 6, and the stability of the test chamber body 6 are improved.
In an alternative embodiment, the air inlet portion 61 and the air outlet portion 62 are respectively located at two ends of the test chamber body 6 away from each other; the plurality of sets of sensor bases 7 are located at equal intervals between the air inlet portion 61 and the air outlet portion 62.
In an alternative embodiment, the air inlet portion 61 and the air outlet portion 62 have the same structure, and the air inlet portion 61 and the air outlet portion 62 are symmetrically distributed around the central axis of the test chamber body 6.
As shown in fig. 2, in an alternative embodiment, the air intake portion 61 includes a first connection portion 611 and a second connection portion 612;
the first connecting part 611 is of a cylindrical structure, one end of the first connecting part 611 is connected with the test chamber body 6, and the other end of the first connecting part 611 is connected with the second connecting part 612; the diameter value of the pressing end surface of the second connecting portion 612 and the first connecting portion 611 is greater than the outer diameter value of the first connecting portion 611, and the outer diameter value of the second connecting portion 612 along the central axis direction is gradually reduced toward the direction away from the first connecting portion 611.
In an alternative embodiment, the sensor bases 7 are made of rubber; wherein, the test chamber body 6 is provided with a plurality of groups of mounting holes;
the multiple groups of sensor bases 7 are respectively inserted into the multiple groups of mounting holes in an interference fit manner one by one.
In an alternative embodiment, the testing chamber body 6 is made of organic glass; the material of test bin body 6 will select for use on the one hand and do not react with gaseous material, and on the other hand is for the convenience in the carminative requirement of test, probably has certain vacuum, requires that the inner wall of test bin body 6 has certain withstand voltage, therefore test bin body 6 selects the organic glass material, and test bin body 6 passes through the support and supports, and is simple safe convenient.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A synchronous testing bin for the performance of multiple gas sensors is characterized by comprising a gas distribution bottle (1), a first connecting pipe (2), a three-way control valve (3), a first air pumping cylinder (4), a second connecting pipe (5), a testing bin body (6), a third connecting pipe (8) and a second air pumping cylinder (9);
the test chamber body (6) is provided with an air inlet part (61), an air outlet part (62) and a plurality of groups of sensor bases (7); each group of sensor bases (7) is provided with a test socket for electrically connecting the sensors; the air inlet part (61) is provided with an air inlet hole along the central axis direction thereof, and the air inlet hole is used for communicating the interior of the test chamber body (6); the air outlet part (62) is provided with an air outlet hole along the central axis direction thereof, and the air outlet hole is used for communicating the interior of the test bin body (6);
a pipe orifice at one end of the third connecting pipe (8) is connected with the air outlet, and a pipe orifice at the other end of the third connecting pipe (8) is connected with an air exhaust port of the second air exhaust cylinder (9);
a pipe orifice at one end of the second connecting pipe (5) is connected with the air inlet, and a pipe orifice at the other end of the second connecting pipe (5) is connected with a first port of the three-way control valve (3);
the air exhaust port of the first air exhaust cylinder (4) is connected with the second port of the three-way control valve (3);
a pipe orifice at one end of the first connecting pipe (2) is connected with a third port of the three-way control valve (3), and a pipe orifice at the other end of the first connecting pipe (2) is connected with an air outlet port of a gas distribution bottle (1) for storing detection gases with different concentrations; a temperature sensor, a humidity sensor and a pressure sensor are arranged in the gas distribution bottle (1).
2. The synchronous testing bin of the performance of the multiple gas sensors according to claim 1, characterized in that the maximum measuring range of the first air pumping cylinder (4) and the second air pumping cylinder (9) is 150 ml.
3. The synchronous test chamber for performance of multiple gas sensors according to claim 1, wherein the test chamber body (6), the gas inlet part (61) and the gas outlet part (62) are of an integrated structure.
4. The synchronous test chamber of the performance of the multiple gas sensors according to claim 1, characterized in that the gas inlet part (61) and the gas outlet part (62) are respectively arranged at two ends of the test chamber body (6) which are far away from each other; the multiple groups of sensor bases (7) are positioned between the air inlet part (61) and the air outlet part (62) at equal intervals.
5. The synchronous test chamber of multi-gas sensor performance according to claim 4, characterized in that the air inlet part (61) and the air outlet part (62) have the same structure, and the air inlet part (61) and the air outlet part (62) are symmetrically distributed with the central axis of the test chamber body (6) as the center.
6. A multi-gas sensor synchronous performance test chamber according to claim 5, wherein the gas inlet portion (61) comprises a first connection portion (611) and a second connection portion (612);
the first connecting part (611) is of a cylindrical structure, one end of the first connecting part (611) is connected with the test bin body (6), and the other end of the first connecting part (611) is connected with the second connecting part (612); the diameter value of the pressing end surface of the second connecting part (612) and the first connecting part (611) is larger than the outer diameter value of the first connecting part (611), and the outer diameter value of the second connecting part (612) along the central axis direction is gradually reduced towards the direction far away from the first connecting part (611).
7. The synchronous testing bin of multi-gas sensor performance according to claim 1, characterized in that the sensor bases (7) are made of rubber; wherein, a plurality of groups of mounting holes are arranged on the test bin body (6);
the multiple groups of sensor bases (7) are respectively inserted into the multiple groups of mounting holes in an interference fit manner one by one.
8. The synchronous testing bin of multi-gas sensor performance according to claim 1, characterized in that the testing bin body (6) is made of organic glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011017098.3A CN112379042A (en) | 2020-09-24 | 2020-09-24 | Synchronous test bin for performance of multiple gas sensors |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011017098.3A CN112379042A (en) | 2020-09-24 | 2020-09-24 | Synchronous test bin for performance of multiple gas sensors |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113109510A (en) * | 2021-03-25 | 2021-07-13 | 山东瑶安电子科技发展有限公司 | Calibration device for gas sensor |
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2020
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| JP2007064028A (en) * | 2005-08-29 | 2007-03-15 | Sanden Corp | Variable displacement compressor |
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Application publication date: 20210219 |