CN113125639A - Calibration method and system for hydrogen concentration sensor - Google Patents
Calibration method and system for hydrogen concentration sensor Download PDFInfo
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- CN113125639A CN113125639A CN202110248998.7A CN202110248998A CN113125639A CN 113125639 A CN113125639 A CN 113125639A CN 202110248998 A CN202110248998 A CN 202110248998A CN 113125639 A CN113125639 A CN 113125639A
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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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- 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
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
Abstract
The invention discloses a calibration method and a calibration system for a hydrogen concentration sensor.
Description
Technical Field
The invention relates to the technical field of sensor calibration, in particular to a method and a system for calibrating a hydrogen concentration sensor.
Background
The hydrogen energy is used as a green energy source, and the combustion product of the hydrogen energy is only water, so that the hydrogen energy is more and more favored by people due to the advantages of wide distribution (hydrogen can be produced by water), inexhaustibility in regeneration, no pollution, large energy density, wide application range and the like, and has wide development and application prospects. The hydrogen is widely applied as an important industrial raw material in the fields of petroleum, chemical industry, electric power, metallurgy, nuclear technology and the like, and particularly in recent years, the application range of the hydrogen is expanded due to the rapid development of new energy automobiles, and meanwhile, the application of the hydrogen is closer to the life of people.
Due to the rapid development of hydrogen fuel cell vehicles, people have raised concerns about the safety of on-vehicle hydrogen. Therefore, the hydrogen concentration of the hydrogen bottle, the galvanic pile and other parts of the hydrogen fuel cell automobile needs to be monitored in real time, so that the automobile can give out early warning and make corresponding safety guarantee measures in time when hydrogen leakage occurs, a vehicle-mounted hydrogen concentration sensor is needed to play a role, and at present, catalytic combustion type hydrogen concentration sensors are more used on the hydrogen fuel cell automobile.
Before leaving a factory, the hydrogen concentration sensor needs to calibrate a series of performance parameters thereof to ensure the detection accuracy of the hydrogen concentration sensor.
Disclosure of Invention
The present invention is directed to a method and system for calibrating a hydrogen concentration sensor, which solves one or more of the problems of the prior art and provides at least one of the advantages of the present invention.
The technical scheme adopted for solving the technical problems is as follows:
a calibration method of a hydrogen concentration sensor comprises the following steps:
300, the upper computer module acquires detection data of a plurality of hydrogen concentration sensors to be detected, and calculates variance values of the detection data of the hydrogen concentration sensors to be detected under current environmental parameters according to the detection data;
step 500, judging whether the number of the acquired correction parameters meets the requirements, if not, returning to the step 100, modifying the hydrogen concentration value, resetting the calibration environment, otherwise, forming a correction parameter group by a plurality of correction parameters, and continuing to execute the next step;
step 600, judging whether the quantity of the obtained correction parameter sets meets the requirements, if not, returning to the step 100, modifying the temperature value, resetting the calibration environment, otherwise, continuing to execute the next step;
step 700, adjusting internal components of the hydrogen concentration sensor to be measured according to a plurality of correction parameter sets.
As a further improvement of the above technical solution, in step 300, the upper computer module needs to acquire response time of the hydrogen concentration sensor to be detected while acquiring detection data of the plurality of hydrogen concentration sensors to be detected.
The invention also discloses a calibration system of the hydrogen concentration sensor, which comprises the following components:
the gas generation module is used for generating and outputting a test gas to the outside;
a gas channel, one end of which is connected with the gas generation module;
the sensor testing module is connected with the other end of the gas channel and used for providing a place for the reaction of the hydrogen concentration sensor and the testing gas;
one end of the circulating channel is connected with the sensor testing module, and the other end of the circulating channel is connected with the gas generating module;
the upper computer module is electrically connected with the gas generation module and the sensor testing module respectively;
the sensor testing module includes:
the calibration hydrogen concentration sensor is electrically connected with the upper computer module;
the hydrogen concentration sensor to be detected is electrically connected with the upper computer module;
the first temperature sensor is electrically connected with the upper computer module;
the air pressure sensor is electrically connected with the upper computer module;
detecting the box body;
a reaction cavity is arranged on the inner side of the top of the detection box body, and a space between the reaction cavity and the detection box body is defined as a calibration cavity;
the calibration hydrogen concentration sensor, the first temperature sensor and the air pressure sensor are arranged in the calibration cavity, and the to-be-detected hydrogen concentration sensor is arranged at the top of the detection box body and extends into the reaction cavity through the top of the detection box body;
the upper computer module is configured to execute the calibration method.
As a further improvement of the above technical scheme, the left side and the right side of the reaction chamber are respectively provided with a turning plate, the two turning plates are connected through a return spring, when the hydrogen concentration sensor to be detected does not trigger the two turning plates, the turning plates are in a closed state, the inside of the reaction chamber is not communicated with the outside, the hydrogen concentration sensor to be detected triggers the two turning plates after being pressed, the turning plates are in an open state, the inside of the reaction chamber is communicated with the outside, and the hydrogen concentration sensor to be detected is in contact reaction with the gas for detection.
As a further improvement of the technical proposal, the turning plate comprises a contact section, the top end of the contact section is used for contacting with the hydrogen concentration sensor to be measured, the bottom end of the contact section is connected with a vertical first attaching section which is attached to the inner side of the reaction cavity, the bottom end of the first attaching section is connected with an outward-inclined hinging section, the middle position of the hinging section is hinged on the side wall of the reaction cavity, the bottom end of the hinged section is connected with a vertical second attaching section which is attached to the outer side of the reaction cavity, one end of the return spring is connected with the inner side of the second attaching section of one of the turning plates, the other end of the return spring is connected with the inner side of the second joint section of the other turnover plate, the contact section, the first laminating section, the hinge section and the second laminating section are integrally formed.
As a further improvement of the above technical solution, the gas generation module includes a generation cavity, a hydrogen tank, an air tank, a first axial flow fan, and a second temperature sensor, the hydrogen tank, the air tank, the gas channel, and the circulation channel are respectively connected to the generation cavity, the first axial flow fan and the second temperature sensor are both disposed inside the generation cavity, air pumps are respectively disposed on a connection channel between the hydrogen tank and the generation cavity and a connection channel between the air tank and the generation cavity, and the second temperature sensor, the first axial flow fan, and the air pump are respectively electrically connected to the upper computer module.
As a further improvement of the above technical solution, an air filter is further disposed on a connecting passage between the air tank and the generating cavity, and a gas flow stabilizer is disposed on the gas passage.
As a further improvement of the above technical solution, the gas generation module further includes a safety channel, an electric valve and a gas storage tank, one end of the safety channel is connected to the generation cavity, the other end of the safety channel is connected to the gas storage tank, the electric valve is disposed on the safety channel, and the electric valve is electrically connected to the upper computer module.
As a further improvement of the above technical solution, a second axial fan and a third temperature sensor are arranged inside the circulation channel, and the second axial fan and the third temperature sensor are respectively electrically connected with the upper computer module.
As a further improvement of the above technical solution, the circulation channel is further provided with a heat exchanger, and the outside of the circulation channel is covered with a heat insulation film.
The invention has the beneficial effects that: according to the technical scheme, the environment parameters of the calibration environment, including the temperature value, the air pressure value and the hydrogen concentration value, are changed for multiple times, so that multiple correction parameter sets are obtained, finally, the internal components of the hydrogen concentration sensor to be measured are adjusted by the multiple correction parameter sets, so that the calibration work of the hydrogen concentration sensor to be measured is completed, and the calibration accuracy is high.
Drawings
The invention is further described with reference to the accompanying drawings and examples;
FIG. 1 is a schematic flow diagram of a calibration method of the present invention;
FIG. 2 is a schematic diagram of the system architecture of the present invention;
FIG. 3 is a schematic diagram of the sensor testing module of the present invention;
FIG. 4 is an overall side view of the sensor testing module of the present invention.
Description of reference numerals:
100. the gas generating device comprises a gas generating module, 110, a generating cavity, 120, a hydrogen tank, 130, an air tank, 140, a first axial flow fan, 150, an air filter, 160, a safety channel, 170, an electric valve, 180, a gas storage tank, 190, an air pump, 200, a gas channel, 210, a gas flow stabilizer, 300, a sensor testing module, 310, a hydrogen concentration sensor to be tested, 320, a calibration hydrogen concentration sensor, 330, a detection box body, 331, a reaction cavity, 332, a calibration cavity, 340, a turning plate, 341, a contact section, 342, a first attaching section, 343, a hinge section, 344, a second attaching section, 350, a reset spring, 400, a circulating channel, 410, a second axial flow fan, 420, a heat exchanger, 510, a first temperature sensor, 520, a second temperature sensor, 530 and a third temperature sensor.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, the present application discloses a method for calibrating a hydrogen concentration sensor, wherein a first embodiment of the method comprises the following steps:
300, the upper computer module acquires detection data of a plurality of hydrogen concentration sensors to be detected, and calculates variance values of the detection data of the hydrogen concentration sensors to be detected under current environmental parameters according to the detection data;
step 500, judging whether the number of the acquired correction parameters meets the requirements, if not, returning to the step 100, modifying the hydrogen concentration value, resetting the calibration environment, otherwise, forming a correction parameter group by a plurality of correction parameters, and continuing to execute the next step;
step 600, judging whether the quantity of the obtained correction parameter sets meets the requirements, if not, returning to the step 100, modifying the temperature value, resetting the calibration environment, otherwise, continuing to execute the next step;
step 700, adjusting internal components of the hydrogen concentration sensor to be measured according to a plurality of correction parameter sets.
Specifically, in this embodiment, a plurality of correction parameter sets are obtained by changing the environmental parameters of the calibration environment, including the temperature value, the air pressure value, and the hydrogen concentration value, multiple correction parameter sets are finally used to adjust the internal components of the hydrogen concentration sensor to be measured, so that the calibration of the hydrogen concentration sensor to be measured is completed, and the calibration accuracy is high.
Further as a preferred implementation manner, in this embodiment, in the step 300, the upper computer module needs to acquire response time of the hydrogen concentration sensor to be detected while acquiring detection data of the plurality of hydrogen concentration sensors to be detected.
Referring to fig. 2, fig. 3 and fig. 4, the present application also discloses a calibration system for a hydrogen concentration sensor, wherein the first embodiment comprises:
the gas generating module 100 is configured to generate and output a test gas to the outside, where the test gas is a mixed gas of hydrogen and air;
a gas passage 200 having one end connected to the gas generation module 100;
a sensor test module 300 connected to the other end of the gas channel 200, for providing a place for the hydrogen concentration sensor to react with the test gas;
a circulation passage 400 having one end connected to the sensor test module 300 and the other end connected to the gas generation module 100;
the upper computer module is electrically connected with the gas generation module 100 and the sensor testing module 300 respectively;
the sensor testing module 300 includes:
a calibrated hydrogen concentration sensor 320 electrically connected with the upper computer module;
the hydrogen concentration sensor 310 to be detected is electrically connected with the upper computer module;
a first temperature sensor 510 electrically connected to the upper computer module;
the air pressure sensor is electrically connected with the upper computer module;
a detection box 330;
a reaction cavity 331 is arranged on the inner side of the top of the detection box body 330, and a space between the reaction cavity 331 and the detection box body 330 is defined as a calibration cavity 332;
the calibration hydrogen concentration sensor 320, the first temperature sensor 510 and the gas pressure sensor are all installed in the calibration cavity 332, and the to-be-detected hydrogen concentration sensor 310 is installed at the top of the detection box 330 and extends into the reaction cavity 331 through the top of the detection box 330;
the upper computer module is configured to execute the first embodiment of the calibration method described above.
Further as a preferred embodiment, in this embodiment, turning plates 340 are respectively disposed on the left side and the right side of the reaction chamber 331, the two turning plates 340 are connected by a return spring 350, when the to-be-tested hydrogen concentration sensor 310 does not trigger the two turning plates 340, the turning plates 340 are in a closed state, the inside and the outside of the reaction chamber 331 are not communicated, the to-be-tested hydrogen concentration sensor 310 is pressed to trigger the two turning plates 340, the turning plates 340 are in an open state, the inside and the outside of the reaction chamber 331 are communicated, and the to-be-tested hydrogen concentration sensor 310 is in contact reaction with the test gas.
Specifically, in this embodiment, when the performance of the hydrogen concentration sensor 310 to be tested is tested, the hydrogen concentration sensor 310 to be tested needs to be inserted into the reaction chamber 331 through the detection box 330, at this time, the hydrogen concentration sensor 310 to be tested triggers the turning plate 340, so that the inside of the reaction chamber 331 is communicated with the outside, so that the testing gas enters the reaction chamber 331, then the hydrogen concentration sensor 310 to be tested reacts with the testing gas in the reaction chamber 331, and the hydrogen concentration sensor 310 to be tested is extracted after the test is completed, at this time, the inside of the reaction chamber 331 is not communicated with the outside due to the arrangement of the return spring 350, so that the testing gas is prevented from flowing out; in this embodiment, the loading test process of the hydrogen concentration sensor 310 to be tested is convenient, the detection efficiency is improved, and the structure for realizing the corresponding function is simple and easy to implement.
In this embodiment, the calibrated hydrogen concentration sensor 320 is arranged to compare with the to-be-detected hydrogen concentration sensor 310, and check whether the performance index of the to-be-detected hydrogen concentration sensor 310 meets the requirement.
Referring to fig. 4, in this embodiment, the hydrogen concentration sensor 310 to be measured is specifically disposed at the top of the detection box 330, the calibration hydrogen concentration sensor 320 is disposed at the front end surface of the detection box 330, and the hydrogen concentration sensor 310 to be measured and the calibration hydrogen concentration sensor 320 do not interfere with each other in the space position of the detection box 330, so as to prevent the two from interfering with each other.
Further as a preferred implementation manner, in this embodiment, the turning plates 340 include a contact section 341, a top end of the contact section 341 is configured to contact the hydrogen concentration sensor 310 to be measured, a bottom end of the contact section 341 is connected to a vertical first attaching section 342, the first attaching section 342 is attached to the inner side of the reaction chamber 331, a bottom end of the first attaching section 342 is connected to a hinge section 343 inclined outward, a middle position of the hinge section 343 is hinged to a side wall of the reaction chamber 331, a bottom end of the hinge section 343 is connected to a vertical second attaching section 344, the second attaching section 344 is attached to the outer side of the reaction chamber 331, one end of the return spring 350 is connected to the inner side of the second attaching section 344 of one of the turning plates 340, and the other end of the return spring 350 is connected to the inner side of the second attaching section 344 of the other turning plate 340, the contact section 341, the first attachment section 342, the hinge section 343, and the second attachment section 344 are integrally formed. When the performance test of the hydrogen concentration sensor 310 to be tested is performed by using the embodiment, after the hydrogen concentration sensor 310 to be tested is inserted, the hydrogen concentration sensor 310 to be tested touches the contact section 341 of the turning plate 340, the turning plate 340 rotates by a certain angle around the hinge position of the hinge section 343 and the reaction chamber 331, at this time, the inside of the reaction chamber 331 is communicated with the outside, and the test gas output from the gas generation module 100 enters the reaction chamber 331 through the gas channel 200 to react with the hydrogen concentration sensor 310 to be tested, so as to perform the performance test of the hydrogen concentration sensor 310 to be tested.
Further, in a preferred embodiment, in this embodiment, a sealing rubber ring is respectively disposed between the first attaching section 342 and the inner sidewall of the reaction chamber 331, and between the second attaching section 344 and the outer sidewall of the reaction chamber 331, so as to improve the air tightness of this embodiment.
Further, in a preferred embodiment, in the present embodiment, the gas generation module 100 includes a generation chamber 110, a hydrogen tank 120, an air tank 130, a first axial flow fan 140, and a second temperature sensor 520, the hydrogen tank 120, the air tank 130, the gas channel 200, and the circulation channel 400 are respectively connected to the generation chamber 110, the first axial flow fan 140 and the second temperature sensor 520 are both disposed inside the generation chamber 110, an air pump 190 is respectively disposed on a connection channel between the hydrogen tank 120 and the generation chamber 110, and a connection channel between the air tank 130 and the generation chamber 110, and the second temperature sensor 520, the first axial flow fan 140, and the air pump 190 are respectively electrically connected to the upper computer module. In this embodiment, the upper computer module precisely controls the hydrogen concentration of the testing gas input into the generation cavity 110 through the two air pumps 190, and improves the fluidity of the testing gas through the arrangement of the first axial flow fan 140.
In the present embodiment, the hydrogen tank 120 and the air tank 130 are provided to control the testing gas in the apparatus according to any ratio, so that the cost is effectively reduced on the premise of ensuring the accuracy of the concentration of the testing gas hydrogen.
In a further preferred embodiment, in the present embodiment, an air filter 150 is further disposed on a connecting passage between the air tank 130 and the generating chamber 110, and a gas flow stabilizer 210 is disposed on the gas passage 200. Through air cleaner 150's setting in this embodiment, reduce the particulate matter quantity of test gas, improve the life of this embodiment, simultaneously through in this embodiment the setting of gaseous current regulator 210 makes test gas enter into mix before detecting box 330, guarantee that it is unanimous to set up the hydrogen concentration sensor test data at different positions in detecting box 330, improves the performance test precision.
In a further preferred embodiment, in this embodiment, the gas generation module 100 further includes a safety channel 160, an electric valve 170, and an air storage tank 180, one end of the safety channel 160 is connected to the generation cavity 110, the other end of the safety channel 160 is connected to the air storage tank 180, the electric valve 170 is disposed on the safety channel 160, and the electric valve 170 is electrically connected to the upper computer module. It is clear to those skilled in the art that hydrogen is flammable and explosive gas, and the lower explosion limit concentration of hydrogen is relatively low, and explosion is likely to occur when the lower explosion limit concentration is reached, so in this embodiment, the combined configuration of the safety channel 160, the electric valve 170 and the gas storage tank 180 is such that when the hydrogen concentration in the generation cavity 110 is too high and danger is generated, the upper computer module controls the electric valve 170 to open, and the gas in the internal generation cavity 110 enters the gas storage tank 180 through the safety channel 160, so as to rapidly reduce the hydrogen concentration in the generation cavity 110, and prevent dangerous situations such as explosion.
Further, in a preferred embodiment, a second axial fan 410 and a third temperature sensor 530 are disposed inside the circulation channel 400, the second axial fan 410 and the third temperature sensor 530 are electrically connected to the upper computer module, respectively, and the second axial fan 410 is disposed to further improve the fluidity of the test gas in the present embodiment.
In this embodiment, the arrangement of the first axial flow fan 140 and the second axial flow fan 410 allows the gas in the whole device to circulate smoothly, and the arrangement of the current stabilizer 210 forms a current stabilizing layer in the device, so as to ensure that the hydrogen concentration in the device is uniform and stable during the test, thereby ensuring the accuracy of the test.
Further, in a preferred embodiment, in this embodiment, a heat exchanger 420 is further disposed on the circulation passage 400, and the outside of the circulation passage 400 is covered with a heat insulating film. In the present embodiment, the heat exchanger 420 and the heat insulating film are provided to improve the accuracy of controlling the temperature of the test gas in the present embodiment.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (10)
1. A calibration method of a hydrogen concentration sensor is characterized by comprising the following steps: the method comprises the following steps:
step 100, setting environmental parameters of a calibration environment, generating the calibration environment by an upper computer module according to the environmental parameters, wherein the environmental parameters comprise a temperature value, an air pressure value and a hydrogen concentration value;
step 200, installing a hydrogen concentration sensor to be detected, and connecting the hydrogen concentration sensor to be detected to the upper computer module;
300, the upper computer module acquires detection data of a plurality of hydrogen concentration sensors to be detected, and calculates variance values of the detection data of the hydrogen concentration sensors to be detected under current environmental parameters according to the detection data;
step 400, judging whether the variance value of the detection data of the hydrogen concentration sensor to be detected meets the requirement, if so, taking the average value of the detection data of the hydrogen concentration sensor to be detected under the current environmental parameter as the correction parameter of the hydrogen concentration sensor to be detected under the current environmental parameter;
step 500, judging whether the number of the acquired correction parameters meets the requirements, if not, returning to the step 100, modifying the hydrogen concentration value, resetting the calibration environment, otherwise, forming a correction parameter group by a plurality of correction parameters, and continuing to execute the next step;
step 600, judging whether the quantity of the obtained correction parameter sets meets the requirements, if not, returning to the step 100, modifying the temperature value, resetting the calibration environment, otherwise, continuing to execute the next step;
step 700, adjusting internal components of the hydrogen concentration sensor to be measured according to a plurality of correction parameter sets.
2. The method for calibrating the hydrogen concentration sensor according to claim 1, wherein: in step 300, the upper computer module acquires the detection data of the hydrogen concentration sensors to be detected, and also needs to acquire the response time of the hydrogen concentration sensors to be detected.
3. A hydrogen concentration sensor calibration system is characterized in that: the method comprises the following steps:
a gas generation module (100) for generating and outputting a test gas to the outside;
a gas channel (200) having one end connected to the gas generation module (100);
the sensor testing module (300) is connected with the other end of the gas channel (200) and is used for providing a place for the reaction of the hydrogen concentration sensor and the testing gas;
a circulation channel (400) having one end connected to the sensor testing module (300) and the other end connected to the gas generation module (100);
the upper computer module is electrically connected with the gas generation module (100) and the sensor testing module (300) respectively;
the sensor testing module (300) comprises:
a calibrated hydrogen concentration sensor (320) electrically connected with the upper computer module;
the hydrogen concentration sensor (310) to be detected is electrically connected with the upper computer module;
a first temperature sensor (510) electrically connected to the upper computer module;
the air pressure sensor is electrically connected with the upper computer module;
a detection box (330);
a reaction cavity (331) is arranged on the inner side of the top of the detection box body (330), and a space between the reaction cavity (331) and the detection box body (330) is defined as a calibration cavity (332);
the calibration hydrogen concentration sensor (320), the first temperature sensor (510) and the gas pressure sensor are arranged in the calibration cavity (332), and the to-be-detected hydrogen concentration sensor (310) is arranged at the top of the detection box body (330) and extends into the reaction cavity (331) through the top of the detection box body (330);
the upper computer module is configured to execute the calibration method of claim 1 or 2.
4. The system for calibrating a hydrogen concentration sensor according to claim 3, wherein: the left side and the right side of the reaction cavity (331) are respectively provided with a turning plate (340), the two turning plates (340) are connected through a reset spring (350), when the hydrogen concentration sensor (310) to be tested does not trigger the two turning plates (340), the turning plates (340) are in a closed state, the inside and the outside of the reaction cavity (331) are not communicated, the hydrogen concentration sensor (310) to be tested triggers the two turning plates (340) after being pressed, the turning plates (340) are in an open state, the inside and the outside of the reaction cavity (331) are communicated, and the hydrogen concentration sensor (310) to be tested is in contact reaction with the gas for testing.
5. The system for calibrating a hydrogen concentration sensor according to claim 4, wherein: the turning plate (340) comprises a contact section (341), the top end of the contact section (341) is used for contacting with the hydrogen concentration sensor (310) to be detected, the bottom end of the contact section (341) is connected with a vertical first attaching section (342), the first attaching section (342) is attached to the inner side of the reaction cavity (331), the bottom end of the first attaching section (342) is connected with a hinge section (343) which inclines outwards, the middle position of the hinge section (343) is hinged on the side wall of the reaction cavity (331), the bottom end of the hinge section (343) is connected with a vertical second attaching section (344), the second attaching section (344) is attached to the outer side of the reaction cavity (331), one end of the return spring (350) is connected with the inner side of the second attaching section (344) of one of the turning plates (340), and the other end of the return spring (350) is connected with the inner side of the second attaching section (344) of the other turning plate (340) Are connected.
6. The system for calibrating a hydrogen concentration sensor according to claim 3, wherein: the gas generation module (100) comprises a generation chamber (110), a hydrogen tank (120), an air tank (130), a first axial fan (140) and a second temperature sensor (520), the hydrogen tank (120), the air tank (130), the gas channel (200), and the circulation channel (400) are respectively connected to the generation chamber (110), the first axial fan (140) and the second temperature sensor (520) are both arranged inside the generating chamber (110), an air pump (190) is respectively arranged on a connecting channel of the hydrogen tank (120) and the generating cavity (110) and on a connecting channel of the air tank (130) and the generating cavity (110), the second temperature sensor (520), the first axial flow fan (140) and the air pump (190) are electrically connected with the upper computer module respectively.
7. The system for calibrating a hydrogen concentration sensor according to claim 6, wherein: an air filter (150) is further arranged on a connecting channel between the air tank (130) and the generating cavity (110), and a gas flow stabilizer (210) is arranged on the gas channel (200).
8. The system for calibrating a hydrogen concentration sensor according to claim 6, wherein: the gas generation module (100) further comprises a safety channel (160), an electric valve (170) and a gas storage tank (180), one end of the safety channel (160) is connected with the generation cavity (110), the other end of the safety channel (160) is connected with the gas storage tank (180), the electric valve (170) is arranged on the safety channel (160), and the electric valve (170) is electrically connected with the upper computer module.
9. The system for calibrating a hydrogen concentration sensor according to claim 3, wherein: a second axial flow fan (410) and a third temperature sensor (530) are arranged in the circulating channel (400), and the second axial flow fan (410) and the third temperature sensor (530) are electrically connected with the upper computer module respectively.
10. The system for calibrating a hydrogen concentration sensor according to claim 3, wherein: the circulating channel (400) is also provided with a heat exchanger (420), and the outer side of the circulating channel (400) is covered with a heat insulation film.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113866349A (en) * | 2021-08-26 | 2021-12-31 | 中汽研新能源汽车检验中心(天津)有限公司 | Quick test calibration device and calibration method for hydrogen concentration sensor |
| CN114544881A (en) * | 2022-03-06 | 2022-05-27 | 深圳市赋感科技有限公司 | Multi-gas-sensor calibration equipment applied to safety detection of energy storage battery |
| CN115825360A (en) * | 2023-02-21 | 2023-03-21 | 北京重理能源科技有限公司 | Calibration method and system for hydrogen concentration sensor of fuel cell vehicle |
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