CN113865798A - Testing device and testing method for simulating hydrogen leakage detection of vehicle-mounted hydrogen system - Google Patents
Testing device and testing method for simulating hydrogen leakage detection of vehicle-mounted hydrogen system Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 342
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 342
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 319
- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 40
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- 238000004088 simulation Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000010998 test method Methods 0.000 claims abstract description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 26
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
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- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
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Abstract
The invention provides a test device and a test method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system, and the test device comprises a hydrogen pressure regulating unit, a hydrogen gas source unit, a hydrogen flow control unit, a hydrogen concentration sensor unit, a wind speed simulation unit, a control unit and a power supply unit, wherein the inlet end of the hydrogen pressure regulating unit is fixedly communicated to the hydrogen gas source unit, the outlet end of the hydrogen pressure regulating unit is fixedly communicated to one end of the hydrogen flow control unit, and the other end of the hydrogen flow control unit is fixedly communicated to an external hydrogen fuel cell vehicle. The testing device and the testing method for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system have the advantages of simple structure and reasonable design, can record the time from the monitoring of the hydrogen leakage to the test completion of the hydrogen concentration sensor at each test point, draw a hydrogen concentration value-time curve, analyze the diffusion path of the hydrogen in the leakage process, and are simple and easy to operate, economical, practical and easy to popularize.
Description
Technical Field
The invention belongs to the field of hydrogen fuel cell testing, and particularly relates to a testing device and a testing method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system.
Background
The hydrogen has the characteristics of flammability and explosiveness, and the safety guarantee of the hydrogen fuel cell vehicle is very important in the process of using the hydrogen. In order to detect the leakage of hydrogen early and prevent the leakage from accumulating, a hydrogen concentration sensor is required.
When hydrogen gas leaks, the hydrogen concentration sensor can monitor the hydrogen concentration and provide an alarm, so that personnel can process the hydrogen gas in time.
At present, hydrogen concentration sensors of hydrogen fuel cell vehicles are mainly arranged near a filling cabin, a passenger cabin and an on-board hydrogen system, but the specific arrangement position is not specifically determined. The arrangement position of the hydrogen concentration sensor is influenced by factors such as the type of the hydrogen fuel cell vehicle, the running environment and the like, and the hydrogen concentration sensor has a complex structure and high requirement on operators.
The invention provides a test device and a test method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system, which are used for finding out the optimal arrangement positions of hydrogen concentration sensors of different hydrogen fuel cell vehicles, providing arrangement basis and finding out a diffusion path after hydrogen leakage.
Disclosure of Invention
In view of this, the invention aims to provide a testing device for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system, which solves the problems of complex structure and complex operation in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the inlet end of the hydrogen pressure regulating unit is fixedly communicated to the hydrogen source unit, the outlet end of the hydrogen pressure regulating unit is fixedly communicated to one end of the hydrogen flow control unit, the other end of the hydrogen flow control unit is fixedly communicated to an external hydrogen fuel cell vehicle, the hydrogen pressure regulating unit, the hydrogen source unit, the hydrogen flow control unit, the hydrogen concentration sensor unit and the wind speed simulation unit are all in signal connection with the control unit, and the hydrogen pressure regulating unit, the hydrogen source unit, the hydrogen flow control unit, the hydrogen concentration sensor unit, the wind speed simulation unit and the control unit are all electrically connected to the power supply unit.
Furthermore, the hydrogen pressure regulating unit comprises a filter, a pressure regulating valve and a pressure sensor, wherein a pipeline at one end of the pressure regulating valve is communicated with the filter, a pipeline at the other end of the pressure regulating valve is communicated with one end of the pressure sensor, a pipeline at the other end of the pressure sensor is communicated with the hydrogen flow control unit, and the filter, the pressure regulating valve and the pressure sensor are all in signal connection with the control unit.
Furthermore, the hydrogen gas source unit comprises a hydrogen storage bottle and a bottleneck valve, a pipeline at one end of the bottleneck valve is communicated to the hydrogen storage bottle, a pipeline at the other end of the bottleneck valve is communicated to the filter, and the bottleneck valve is in signal connection with the control unit.
Furthermore, the hydrogen flow control unit comprises a flow controller, an electromagnetic valve and a hydrogen discharge port, wherein a pipeline at one end of the electromagnetic valve is communicated to one end of the flow controller, a pipeline at the other end of the electromagnetic valve is communicated to the hydrogen discharge port, the hydrogen discharge port is fixedly communicated with an external hydrogen fuel cell vehicle, a pipeline at the other end of the flow controller is communicated to a pressure sensor, and the flow controller and the electromagnetic valve are in signal connection with the control unit.
Further, the hydrogen concentration sensor unit comprises a plurality of hydrogen concentration sensors, each hydrogen concentration sensor is fixed to the hydrogen fuel cell vehicle, each hydrogen concentration sensor is used for monitoring the hydrogen concentration of the hydrogen fuel cell vehicle, and each hydrogen concentration sensor is connected to the control unit through signals.
Compared with the prior art, the test device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system has the following advantages:
(1) the testing device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system, disclosed by the invention, has the advantages of simple structure and reasonable design, can record the time from the monitoring of the hydrogen leakage to the test completion of the hydrogen concentration sensor at each test point, draw a hydrogen concentration value-time curve, analyze the diffusion path of the hydrogen in the leakage process, and is simple and easy to operate, economic, practical and easy to popularize.
Another objective of the present invention is to provide a testing method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system, so as to find out the optimal arrangement positions of hydrogen concentration sensors of different hydrogen fuel cell vehicles, provide arrangement basis, and find out the diffusion path after hydrogen leakage.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a test method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system comprises the following steps:
s1, arranging hydrogen concentration sensors of the hydrogen concentration sensor units at different positions of the hydrogen fuel cell vehicle;
s2, the control unit controls the wind speed simulation unit to simulate the wind speed environment of the hydrogen fuel cell vehicle in the actual running or parking process;
s3, opening a bottle mouth valve in the hydrogen source unit, adjusting the hydrogen pressure by the hydrogen pressure adjusting unit, controlling the hydrogen flow by the hydrogen flow control unit, and discharging hydrogen at the specified position of the hydrogen fuel cell vehicle through a hydrogen discharge port;
and S4, the control unit controls the hydrogen concentration sensor unit, records the time from the monitoring of the hydrogen concentration to the end of the test of each hydrogen concentration sensor, and draws a hydrogen concentration value-time curve.
S5, sequencing the maximum hydrogen concentration values monitored by all the hydrogen concentration sensors in the test process by the control unit to obtain the optimal position for arranging the hydrogen concentration sensors in the hydrogen fuel cell vehicle;
s6, analyzing the sequence of hydrogen concentration values monitored by different hydrogen concentration sensors in the control unit, and determining the diffusion path of the hydrogen after leakage.
Compared with the prior art, the test method for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system has the following advantages:
(1) the test method for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system can simulate a real wind speed environment, find out the optimal arrangement position of the hydrogen concentration sensor in the running or parking process of the hydrogen fuel cell vehicle, and is high in accuracy and simple and easy to operate.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a testing process of a testing device and a testing method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system according to an embodiment of the invention;
fig. 2 is a control flow chart of a testing apparatus and a testing method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system according to an embodiment of the present invention.
Fig. 3 is a power supply flow chart of a test device and a test method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system according to an embodiment of the invention.
Description of reference numerals:
1. a hydrogen storage bottle; 2. a bottleneck valve; 3. a filter; 4. a pressure regulating valve; 5. a pressure sensor; 6. a flow controller; 7. an electromagnetic valve; 8. a hydrogen discharge port; 9. a hydrogen concentration sensor unit; 10. a wind speed simulation unit; 11. a control unit.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 to 3, a testing device for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system comprises a hydrogen pressure regulating unit, a hydrogen source unit, a hydrogen flow control unit, a hydrogen concentration sensor unit 9, a wind speed simulation unit 10, a control unit 11 and a power supply unit, wherein an inlet end of the hydrogen pressure regulating unit is fixedly communicated with the hydrogen source unit, an outlet end of the hydrogen pressure regulating unit is fixedly communicated with one end of the hydrogen flow control unit, the other end of the hydrogen flow control unit is fixedly communicated with an external hydrogen fuel cell vehicle, the hydrogen pressure regulating unit, the hydrogen source unit, the hydrogen flow control unit, the hydrogen concentration sensor unit 9 and the wind speed simulation unit 10 are all in signal connection with the control unit 11, and the hydrogen pressure regulating unit, the hydrogen source unit, the hydrogen flow control unit, the hydrogen concentration sensor unit 9, the wind speed simulation unit 10 and the control unit 11 are all electrically connected to the power supply unit, the control unit 11 is an upper computer. The control unit 11 controls the hydrogen pressure regulating unit to enable the hydrogen pressure to reach the set requirement, and the pressure sensor 5 monitors the hydrogen pressure in the pipeline. The control unit 11 controls the hydrogen flow control unit to make the hydrogen flow reach a set value, and the electromagnetic valve 7 is opened and closed to discharge hydrogen. The control unit 11 controls the hydrogen concentration sensor unit 9 to monitor the hydrogen concentration. The control unit 11 controls the wind speed simulation unit 10 to simulate the real wind speed environment of the hydrogen fuel cell vehicle. The hydrogen source unit, the hydrogen pressure regulating unit, the hydrogen flow control unit, the hydrogen concentration sensor unit 9, the wind speed simulation unit 10 and the control unit 11 are all connected with the power supply unit. The power supply unit supplies power to the hydrogen gas source unit, the hydrogen pressure regulating unit, the hydrogen flow control unit, the hydrogen concentration sensor unit 9, the wind speed simulation unit 10 and the control unit 11.
The test device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system is simple in structure and reasonable in design, can record the time from monitoring hydrogen leakage to the end of a test of the hydrogen concentration sensor of each test point, draw a hydrogen concentration value-time curve, can analyze the diffusion path of hydrogen in the leakage process, is simple and easy to operate, is economical and practical, and is easy to popularize.
The hydrogen pressure regulating unit comprises a filter 3, a pressure regulating valve 4 and a pressure sensor 5, wherein a pipeline at one end of the pressure regulating valve 4 is communicated to the filter 3, a pipeline at the other end of the pressure regulating valve 4 is communicated to one end of the pressure sensor 5, a pipeline at the other end of the pressure sensor 5 is communicated to the hydrogen flow control unit, the filter 3, the pressure regulating valve 4 and the pressure sensor 5 are all in signal connection with a control unit 11, and the filter 3, the pressure regulating valve 4 and the pressure sensor 5 are all in the prior art. The filter 3 is for filtering impurities in the hydrogen gas. The pressure regulating valve 4 is used to regulate the pressure of hydrogen in the pipeline. The pressure sensor 5 is used to monitor the pressure of the hydrogen gas in the pipeline.
The hydrogen gas source unit comprises a hydrogen storage bottle 1 and a bottleneck valve 2, a pipeline at one end of the bottleneck valve 2 is communicated to the hydrogen storage bottle 1, a pipeline at the other end of the bottleneck valve 2 is communicated to a filter 3, the bottleneck valve 2 is in signal connection with a control unit 11, the bottleneck valve 2 is in the prior art, and the hydrogen storage bottle 1 is used for storing hydrogen; the bottleneck valve 2 is used for controlling the inlet and outlet of hydrogen in the hydrogen storage bottle 1.
The hydrogen flow control unit comprises a flow controller 6, an electromagnetic valve 7 and a hydrogen discharge port 8, wherein a pipeline at one end of the electromagnetic valve 7 is communicated to one end of the flow controller 6, a pipeline at the other end of the electromagnetic valve 7 is communicated to the hydrogen discharge port 8, the hydrogen discharge port 8 is fixedly communicated with an external hydrogen fuel cell vehicle, a pipeline at the other end of the flow controller 6 is communicated to the pressure sensor 5, the flow controller 6 and the electromagnetic valve 7 are in signal connection with a control unit 11, the flow controller 6 and the electromagnetic valve 7 are in the prior art, and the flow controller 6 is used for controlling the flow of hydrogen in the testing process. The electromagnetic valve 7 is used for controlling the hydrogen discharge through on-off. The hydrogen discharge port 8 is an outlet for hydrogen gas and may be provided at a prescribed position of the hydrogen fuel cell vehicle.
The hydrogen concentration sensor unit 9 includes a plurality of hydrogen concentration sensors, and every hydrogen concentration sensor all is fixed to the hydrogen fuel cell car, and every hydrogen concentration sensor all is used for monitoring the hydrogen concentration of hydrogen fuel cell car, and the equal signal connection of every hydrogen concentration sensor is to the control unit 11, and hydrogen concentration sensor is prior art, hydrogen concentration sensor can distribute in hydrogen fuel cell car different positions. After the hydrogen discharge port discharges hydrogen at a designated position of the vehicle, the hydrogen concentration sensor monitors the hydrogen concentration in real time and uploads data to the control unit 11.
The wind speed simulation unit 10 is used for simulating a real wind speed environment when the vehicle runs or stops, and can truly reproduce a diffusion path of hydrogen after the hydrogen discharge port 8 discharges the hydrogen, and the wind speed simulation unit 10 can be arranged at a designated position of the hydrogen fuel cell vehicle and used for simulating a real wind speed environment.
A test method for simulating hydrogen leakage detection of a vehicle-mounted hydrogen system comprises the following steps:
s1, arranging hydrogen concentration sensors of the hydrogen concentration sensor unit 9 at different positions of the hydrogen fuel cell vehicle;
s2, the control unit 11 controls the wind speed simulation unit 10 to simulate the wind speed environment of the hydrogen fuel cell vehicle in the actual running or parking process;
s3, opening a bottle mouth valve 2 in the hydrogen source unit, adjusting the hydrogen pressure by the hydrogen pressure adjusting unit, controlling the hydrogen flow by the hydrogen flow control unit, and discharging hydrogen at the specified position of the hydrogen fuel cell vehicle through a hydrogen discharge port 9;
s4, the control unit 11 controls the hydrogen concentration sensor unit 9, records the time from the monitoring of the hydrogen concentration to the end of the test of each hydrogen concentration sensor, and draws a hydrogen concentration value-time curve;
s5, the control unit 11 sequences the maximum hydrogen concentration values monitored by all the hydrogen concentration sensors in the test process to obtain the optimal position for arranging the hydrogen concentration sensors in the hydrogen fuel cell vehicle;
s6, analyzing the sequence of hydrogen concentration values monitored by different hydrogen concentration sensors in the control unit 11, determining the diffusion path of hydrogen after leakage, and providing basis for hydrogen safety guarantee of the whole vehicle.
The test method for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system can simulate a real wind speed environment, finds out the optimal arrangement position of the hydrogen concentration sensor in the running or parking process of the hydrogen fuel cell vehicle, and is high in accuracy, simple and easy to operate.
Example 1
In the test, first, hydrogen concentration sensors were disposed at different positions according to the actual vehicle conditions. The wind speed simulation unit 10 is disposed at a designated position of the vehicle, and the control unit 11 controls the wind speed simulation unit 10 to simulate a real wind speed environment in the vehicle. The bottle mouth valve 2 is opened, the pressure of the hydrogen in the pipeline is adjusted to a set value through the pressure adjusting valve 4, and the flow controller controls the flow of the hydrogen in the pipeline to the set value. After the hydrogen gas is discharged from the hydrogen discharge port 9, the control unit 11 collects and analyzes the hydrogen concentration sensor data.
According to parameters such as the measuring range of the measured hydrogen concentration sensor, the control unit 11 controls a hydrogen divider in the standard gas configuration unit to output standard hydrogen with different concentrations from low to high within the range of 0% -4%, sequentially reads the detection value of the hydrogen concentration sensor, draws a standard gas concentration value and a test value curve, and calibrates the hydrogen concentration sensor.
Example 2
In the test, the hydrogen concentration sensors are arranged at different positions according to the actual vehicle condition, such as the top of the filling cabin, the position near the fuel cell stack, the position near the hydrogen path of the fuel cell engine, the position above the vehicle-mounted hydrogen cylinder, the position above the pressure reducing valve in the vehicle-mounted hydrogen system, the front end of the passenger cabin, the rear end of the passenger cabin, the left side of the passenger cabin, the right side of the passenger cabin, the top of the middle of the passenger cabin and the like.
The wind speed simulation unit 10 is arranged at a designated position of the vehicle, such as the front position of the passenger compartment, and the control unit controls the wind speed simulation unit to simulate a real wind speed environment, such as a wind speed of 5m/s, in the vehicle, and the wind direction is directed to the rear end of the passenger compartment.
The bottle mouth valve 2 is opened manually, the pressure of the hydrogen in the pipeline is adjusted to a set value, such as 1MPa, through the pressure adjusting valve 4, and the flow controller 6 controls the flow of the hydrogen in the pipeline to a set value, such as 5 mL/min.
The discharge port is disposed in a vehicle where hydrogen gas is likely to leak, such as in the vicinity of a bottleneck combination valve in a vehicle-mounted hydrogen system, in the vicinity of a pressure reducing valve in a vehicle-mounted hydrogen system, in the vicinity of a hydrogen inlet and outlet of a fuel cell stack, and the like. After the hydrogen gas is discharged from the hydrogen discharge port 8, the control unit 11 collects and analyzes the hydrogen concentration sensor data.
Assuming that 10 hydrogen concentration sensors, numbered from 1 to 10, are arranged, the distribution at different positions of the vehicle corresponds to the hydrogen concentration sensors No. 1 to 10, respectively. The hydrogen concentration values after the test were 10ppm, 15ppm, 45ppm, 78ppm, 9ppm, 13ppm, 1ppm, 3ppm, 32oom, 150ppm, respectively. The hydrogen concentration is highest at the position 10 corresponding to the hydrogen concentration sensor No. 10, and hydrogen gas is likely to accumulate, which is set as the optimal arrangement point of the hydrogen concentration sensor. And taking the initial hydrogen discharge as a time zero point, recording the reading time of each hydrogen concentration sensor, and separating the sequence to obtain the hydrogen diffusion path.
Changing hydrogen flow, changing wind speed, changing the position of the hydrogen discharge port 8, and finding out the optimal arrangement position of the hydrogen concentration sensor and the hydrogen diffusion path under different working conditions.
And analyzing the position with the most occurrence times as the optimal arrangement position of the hydrogen concentration sensor under various working conditions, and using the position as a final selected point to guide the arrangement of the sensors of the actual vehicle. And analyzing different hydrogen diffusion paths under different working conditions, finding out the path with the most repeatability, and guiding the actual hydrogen safety guarantee.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. The utility model provides a test device that simulation on-vehicle hydrogen system hydrogen leaked and detects which characterized in that: the device comprises a hydrogen pressure regulating unit, a hydrogen gas source unit, a hydrogen flow control unit (11), a hydrogen concentration sensor unit (9), a wind speed simulation unit (10), a control unit (11) and a power supply unit, wherein the inlet end of the hydrogen pressure regulating unit is fixedly communicated to the hydrogen gas source unit, the outlet end of the hydrogen pressure regulating unit is fixedly communicated to one end of the hydrogen flow control unit (11), the other end of the hydrogen flow control unit (11) is fixedly communicated to an external hydrogen fuel cell vehicle, the hydrogen pressure regulating unit, the hydrogen gas source unit, the hydrogen flow control unit (11), the hydrogen concentration sensor unit (9) and the wind speed simulation unit (10) are all in signal connection to the control unit (11), and the hydrogen pressure regulating unit, the hydrogen gas source unit, the hydrogen flow control unit (11), the hydrogen concentration sensor unit (9), the wind speed simulation unit (10) and the current simulation unit (11) are arranged, The control units (11) are all electrically connected to the power supply unit.
2. The test device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system according to claim 1, characterized in that: the hydrogen pressure regulating unit comprises a filter (3), a pressure regulating valve (4) and a pressure sensor (5), wherein a pipeline at one end of the pressure regulating valve (4) is communicated to the filter (3), a pipeline at the other end of the pressure regulating valve (4) is communicated to one end of the pressure sensor (5), a pipeline at the other end of the pressure sensor (5) is communicated to the hydrogen flow control unit (11), and the filter (3), the pressure regulating valve (4) and the pressure sensor (5) are all in signal connection with the control unit (11).
3. The test device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system according to claim 2, characterized in that: the hydrogen source unit comprises a hydrogen storage bottle (1) and a bottleneck valve (2), wherein a pipeline at one end of the bottleneck valve (2) is communicated to the hydrogen storage bottle (1), a pipeline at the other end of the bottleneck valve (2) is communicated to a filter (3), and the bottleneck valve (2) is in signal connection with a control unit (11).
4. The test device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system according to claim 2, characterized in that: the hydrogen flow control unit (11) comprises a flow controller (6), an electromagnetic valve (7) and a hydrogen discharge port (8), wherein a pipeline at one end of the electromagnetic valve (7) is communicated to one end of the flow controller (6), a pipeline at the other end of the electromagnetic valve (7) is communicated to the hydrogen discharge port (8), the hydrogen discharge port (8) is fixedly communicated with an external hydrogen fuel cell vehicle, a pipeline at the other end of the flow controller (6) is communicated to a pressure sensor (5), and the flow controller (6) and the electromagnetic valve (7) are in signal connection with the control unit (11).
5. The test device for simulating the hydrogen leakage detection of the vehicle-mounted hydrogen system according to claim 1, characterized in that: the hydrogen concentration sensor unit (9) comprises a plurality of hydrogen concentration sensors, each hydrogen concentration sensor is fixed to the hydrogen fuel cell vehicle, each hydrogen concentration sensor is used for monitoring the hydrogen concentration of the hydrogen fuel cell vehicle, and each hydrogen concentration sensor is connected to the control unit (11) in a signal mode.
6. A test method for simulating the detection of hydrogen leakage of a vehicle-mounted hydrogen system is applied to the test device for simulating the detection of hydrogen leakage of the vehicle-mounted hydrogen system according to any one of claims 1 to 5, and is characterized in that: the method comprises the following steps:
s1, arranging hydrogen concentration sensors of the hydrogen concentration sensor unit (9) at different positions of the hydrogen fuel cell vehicle;
s2, the control unit (11) controls the wind speed simulation unit (10) to simulate the wind speed environment of the hydrogen fuel cell vehicle in the actual running or parking process;
s3, opening a bottle mouth valve (2) in the hydrogen source unit, adjusting the hydrogen pressure by the hydrogen pressure adjusting unit, controlling the hydrogen flow by the hydrogen flow control unit (11), and discharging hydrogen through a hydrogen discharge port (8) at the specified position of the hydrogen fuel cell vehicle;
s4, the control unit (11) controls the hydrogen concentration sensor unit (9), records the time from the monitoring of the hydrogen concentration to the end of the test of each hydrogen concentration sensor, and draws a hydrogen concentration value-time curve;
s5, sequencing the maximum hydrogen concentration values monitored by all the hydrogen concentration sensors in the test process by the control unit (11) to obtain the optimal position for arranging the hydrogen concentration sensors in the hydrogen fuel cell vehicle;
s6, analyzing the sequence of hydrogen concentration values monitored by different hydrogen concentration sensors in the control unit (11), and determining the diffusion path of the hydrogen after leakage.
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| CN115404516A (en) * | 2022-10-19 | 2022-11-29 | 氢联(江苏)高科技有限公司 | Water electrolysis hydrogen production leakage monitoring system |
| CN115993207A (en) * | 2023-03-22 | 2023-04-21 | 北京理工大学 | Hydrogen leakage monitoring method and system for vehicle-mounted hydrogen system |
| CN117405308A (en) * | 2023-12-15 | 2024-01-16 | 浙江大学 | Hydrogen leakage positioning system and positioning method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114811449A (en) * | 2022-04-15 | 2022-07-29 | 国网浙江省电力有限公司宁波供电公司 | Hydrogen energy automobile safety detection device |
| CN114811449B (en) * | 2022-04-15 | 2023-08-22 | 国网浙江省电力有限公司宁波供电公司 | Hydrogen energy automobile safety detection device |
| CN114942477A (en) * | 2022-04-22 | 2022-08-26 | 北京交通大学 | Hydrogen leakage diffusion monitoring method and system for liquid hydrogen fuel cell automobile |
| CN115404516A (en) * | 2022-10-19 | 2022-11-29 | 氢联(江苏)高科技有限公司 | Water electrolysis hydrogen production leakage monitoring system |
| CN115404516B (en) * | 2022-10-19 | 2023-02-24 | 氢联(江苏)高科技有限公司 | Water electrolysis hydrogen production leakage monitoring system |
| CN115993207A (en) * | 2023-03-22 | 2023-04-21 | 北京理工大学 | Hydrogen leakage monitoring method and system for vehicle-mounted hydrogen system |
| CN117405308A (en) * | 2023-12-15 | 2024-01-16 | 浙江大学 | Hydrogen leakage positioning system and positioning method |
| CN117405308B (en) * | 2023-12-15 | 2024-03-26 | 浙江大学 | Hydrogen leakage positioning system and positioning method |
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