Fuel cell passenger car hydrogen cabin leakage detection method and device

Abstract

The invention provides a fuel cell passenger car hydrogen cabin leakage detection method and device, and the method comprises the steps: through the arrangement of a hydrogen storage cylinder, a multi-antenna variable-distance sensor support, hydrogen concentration sensors and a central controller, according to the initial position, the moving speed and the operation time of each hydrogen concentration sensor, carrying out the detection of the leakage of each hydrogen concentration sensor; according to the hydrogen concentration and the hydrogen concentration measured by each hydrogen concentration sensor at each measuring point, a diffusion cloud chart of each testing point, the hydrogen concentration and the operation time is constructed, and the hydrogen leakage position is identified according to the diffusion cloud chart. According to the method, local hydrogen gathering groups which are not expected by simulation can be found, the inherent bottlenecks of a simulation and experience method in the aspects of real-time performance, environment complexity and sudden response are solved through data driving and dynamic adaptation of a real-time cloud picture, and the method is particularly suitable for safety scenes needing second-level response such as hydrogen leakage.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field related to the safety of fuel cell vehicles, and particularly relates to a hydrogen tank leakage detection method and device for a fuel cell bus. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] As a new generation of green energy power system, hydrogen fuel cell engine only produces heat and water in addition to the energy required by the vehicle, which helps to solve the problems of energy crisis and environmental pollution. With the advancement of technology, hydrogen fuel cell vehicles have gradually realized mass production. However, due to the flammable, explosive and leaky nature of hydrogen, the safety of the vehicle is still a problem that needs to be considered for the promotion of hydrogen fuel cell vehicles, and is also the primary problem that needs to be considered in the process of vehicle design.

[0004] Currently, the design of hydrogen tank for fuel cell buses mainly relies on experience design or simulation design, but the accuracy of experience or simulation cannot be guaranteed, and the safety of the vehicle cannot be accurately guaranteed. However, the point-type measurement of hydrogen concentration is accurate, but it is difficult to arrange sampling points, and the safety of the test is not easy to guarantee. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a hydrogen tank leakage detection method and device for a fuel cell bus, which solves the inherent bottlenecks of simulation and experience methods in real-time, environmental complexity and sudden response through data-driven and dynamic adaptation, especially suitable for safety scenarios such as hydrogen leakage which require second-level response.

[0006] In order to achieve the above purpose, the present application adopts the following technical solutions: In a first aspect, the present application provides a hydrogen tank leakage detection device for a fuel cell bus, comprising: a hydrogen storage cylinder, a multi-antenna variable-distance sensor support, a hydrogen concentration sensor and a central controller. The multi-antenna variable-distance sensor support is arranged in the cylinder cabin, and the movable hydrogen concentration sensors are arranged at different positions on the multi-antenna variable-distance sensor support. The central controller is used to construct a diffusion cloud map of each test point, hydrogen concentration and running time according to the initial position, moving speed and running time of each hydrogen concentration sensor on the multi-antenna variable-distance sensor, and the hydrogen concentration measured by each hydrogen concentration sensor at each test point, and identify the hydrogen leakage position according to the diffusion cloud map.

[0007] In a second aspect, the present application provides a hydrogen tank leakage detection method for a fuel cell bus, comprising: Obtain hydrogen detection concentrations of different positions detected by the plurality of hydrogen concentration sensors in the cylinder cabin respectively, and running time corresponding to the movement of the hydrogen concentration sensors at different positions; According to the initial position, the moving speed and the running time of each hydrogen concentration sensor, and the hydrogen concentration measured by each hydrogen concentration sensor at each test point, a diffusion cloud chart of each test point, hydrogen concentration and running time is constructed, and the hydrogen leakage position is identified according to the diffusion cloud chart.

[0008] In a third aspect, the present application provides an electronic device, comprising a memory and a processor, and computer instructions stored in the memory and running on the processor, when the computer instructions are run by the processor, the method of the second aspect is completed.

[0009] In a fourth aspect, the present application provides a computer readable storage medium for storing computer instructions, when the computer instructions are executed by the processor, the method of the second aspect is completed.

[0010] In a fifth aspect, the present application provides a computer program product comprising a computer program, when the computer program is executed by the processor, the method of the second aspect is completed.

[0011] The above one or more technical solutions have the following beneficial effects: In the present application, by setting the hydrogen storage cylinder, the multi-antenna variable distance sensor support, the hydrogen concentration sensor and the central controller, according to the initial position, the moving speed and the running time of each hydrogen concentration sensor, and the hydrogen concentration measured by each hydrogen concentration sensor at each test point, a diffusion cloud chart of each test point, hydrogen concentration and running time is constructed, and the hydrogen leakage position is identified according to the diffusion cloud chart. The present application can find the unexpected local hydrogen aggregation, and the real-time cloud chart is driven by data and dynamically adapted, which solves the inherent bottleneck of simulation and experience method in real-time, environmental complexity and sudden response, and is especially suitable for hydrogen leakage safety scene which needs second-level response.

[0012] The advantages of the additional aspects of the present application will be partially given in the following description, partially will become obvious from the following description, or will be known by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0013] The drawings accompanying the specification of the present application serve to provide a further understanding of the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, and do not constitute an improper limitation of the present application.

[0014] Fig. 1 It is a schematic diagram of the fuel cell bus hydrogen cabin leakage detection device in the embodiment of the present application; Fig. 2A coordinate setting diagram in an embodiment of the present application; Fig. 3 A sensor position calculation schematic diagram in an embodiment of the present application; In the figure, 1, hydrogen storage cylinder; 2, multi-tentacle variable distance sensor support; 3, hydrogen concentration sensor; 4, central controller; 5, display. DETAILED DESCRIPTION

[0015] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0016] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application.

[0017] In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0018] Embodiment one The present embodiment discloses a fuel cell bus hydrogen cabin leakage detection device, comprising: a hydrogen storage cylinder, a multi-tentacle variable distance sensor support, a hydrogen concentration sensor and a central controller; The multi-tentacle variable distance sensor support is arranged in the cylinder cabin, and the movable hydrogen concentration sensors are arranged at different positions on the multi-tentacle variable distance sensor support; The central controller is used to construct a diffusion cloud map of each test point and hydrogen concentration and running time according to the initial position, moving speed and running time of each hydrogen concentration sensor on the multi-tentacle variable distance sensor, and the hydrogen concentration measured by each hydrogen concentration sensor at each measuring point, and identify the hydrogen leakage position according to the diffusion cloud map.

[0019] The following will be combined Figs. 1-3 A fuel cell bus hydrogen cabin leakage detection device according to the present embodiment is described in detail: The hydrogen concentration sensor 3 is installed on the multi-tentacle variable distance sensor support 2 to monitor the hydrogen concentration at each position in the cylinder cabin, the central controller 4 receives the hydrogen concentration information and position information and converts them into a hydrogen concentration cloud map, which is displayed to the test engineer by the display 5.

[0020] The hydrogen storage cylinder 1 stores 4% hydrogen-nitrogen mixed gas, and the release pressure, flow rate and direction can be quantitatively controlled to simulate the hydrogen system leakage in the cabin and provide a hydrogen environment for the hydrogen concentration test in the cabin.

[0021] Multi-antenna variable distance sensor support 2, comprising a plurality of antenna supports, each antenna support is used for installing hydrogen concentration sensor 3, each antenna support can realize constant speed variable distance in a certain range, and multi-point testing of hydrogen concentration in the cabin can be realized.

[0022] The antenna support selects a constant speed cylinder or a low speed motor as the drive, and the variable distance speed can be set according to the reaction time of the hydrogen concentration sensor.

[0023] The height position of each antenna support is set in advance, and the horizontal position can be calculated by the central controller according to the starting position, the set speed and the running time.

[0024] The multi-antenna variable distance sensor support 2 transmits the height position and horizontal position information of the hydrogen concentration sensor 3 to the central controller 4 through signal transmission.

[0025] The hydrogen concentration sensor 3 is used for testing the hydrogen concentration of the region.

[0026] The central controller 4 is the control and calculation of the system, receives the position information of the multi-antenna variable distance sensor support 2 and the hydrogen concentration information of the hydrogen concentration sensor 3, calculates the hydrogen concentration of each position point, and draws the hydrogen concentration cloud chart in the hydrogen cylinder cabin, to provide data support for the hydrogen leakage structure of the vehicle cabin design.

[0027] The display 5 is a man-machine interface, which can realize the display of the data of the central controller 4 and the sending of the engineer's instruction.

[0028] After the work is ready, the engineer sends the test start instruction through the display 5, the central controller 4 receives the instruction, and simultaneously starts the leakage of the hydrogen storage cylinder 1, the execution of the multi-antenna variable distance sensor support 2, the collection of the hydrogen concentration sensor 3 and other work. The execution of the multi-antenna variable distance sensor support 2 is to move all the hydrogen concentration sensors 3 at the same time, and the hydrogen concentration sensor 3 sends the collected hydrogen concentration information to the central controller 4.

[0029] Specifically, the above-mentioned fuel cell bus hydrogen cabin leakage detection device is used to test the hydrogen concentration of the fuel cell bus cylinder cabin, specifically: Adjust the leakage position, pressure, flow rate and direction of the hydrogen storage cylinder to achieve the simulation effect of system leakage. The engineer sends the test start instruction through the display 5, the central controller 4 receives the instruction, and simultaneously starts the leakage of the hydrogen storage cylinder, the execution of the multi-antenna variable distance sensor support 2, the collection of the hydrogen concentration sensor 3 and other work. During the process, the central controller 4 automatically records the position of the multi-antenna variable distance sensor support 2, the hydrogen concentration and other information, and when the hydrogen concentration of all test areas exceeds 2%, the central controller 4 terminates the test and processes the data.

[0030] The main content of data processing is to determine the original coordinate value corresponding to the position of the hydrogen concentration sensor 3 on each antenna support according to the system placement position and the height position setting of each antenna support, that is, (Xi0, Zi0), wherein the X-axis coordinate value Xi0 corresponding to the position of the hydrogen concentration sensor 3 is the horizontal distance from the initial position of the sensor to the center of the multi-antenna variable-distance sensor support 2, and the Z-axis coordinate value Zi0 corresponding to the position of the hydrogen concentration sensor 3 is the vertical distance from the initial position of the sensor to the installation bottom surface of the multi-antenna variable-distance sensor support 2.

[0031] The central controller 4 can determine the relative relationship between the three-dimensional coordinates of each antenna support, that is, each hydrogen concentration sensor, and the running time according to the starting position, variable-distance speed, and running time. The hydrogen concentration sensor 3 moves horizontally on the antenna support of the multi-antenna variable-distance sensor support 2, and the horizontal moving distance is assumed to be li. The position coordinate of the hydrogen concentration sensor 3 at this moment is (Xi0+li, Zi0). The moving speed of the antenna support is set to v, the displacement of the antenna support is v*t, the X-axis direction moving arm length of the antenna support is lmax, and since the antenna support is reciprocating, there are four cases for li and the expression of the sensor position coordinate, that is: 1. When lmax>v*t-n*lmax>0, n is an even number, li=v*t-n*lmax, that is, the current sensor position coordinate value is (Xi0+v*t-n*lmax, Zi0); 2. When lmax>v*t-n*lmax>0, n is an odd number, li=lmax-(v*t-n*lmax), that is, the current sensor position coordinate value is (Xi0+lmax-(v*t-n*lmax), Zi0); 3. When lmax>v*t-n*lmax>0, n is an even number, li=v*t-n*lmax, that is, the current sensor position coordinate value is (-Xi0-v*t+n*lmax, Zi0); 4. When lmax>v*t-n*lmax>0, n is an odd number, li=lmax-(v*t-n*lmax), that is, the current sensor position coordinate value is (-Xi0-lmax+(v*t-n*lmax), Zi0).

[0032] The test of the hydrogen concentration sensor 3 on the hydrogen concentration of each test area is related to the test position and the running time, and thus the hydrogen concentration of each measurement point in the gas cylinder cabin at a certain running time can be obtained.

[0033] Optionally, the area where hydrogen leakage diffusion is possible is divided into a grid, and the hydrogen concentration between the test points is calculated by interpolation to obtain the hydrogen concentration estimation value of all positions in the grid and the corresponding running time.

[0034] Through the above test method, the real-time coordinates of the hydrogen concentration sensor 3 in the established coordinate system can be obtained, and the hydrogen concentration sensor 3 can also collect the hydrogen concentration of the area in real time, that is, the hydrogen concentration of each test point in the established coordinate system can be obtained, and the cloud diagram of the coordinates-hydrogen concentration-running time of each test point can be obtained. For convenience of display, the hydrogen concentration can be identified by different colors. According to the hydrogen diffusion cloud diagram, the designer can try to open the vent hole, set the flow guide plate and other ways on the cabin to design the safety.

[0035] Embodiment two The purpose of this embodiment is to provide a fuel cell bus hydrogen cabin leakage detection method, comprising: Obtaining the hydrogen detection concentration of different positions detected by the hydrogen concentration sensors in the plurality of gas cylinder cabins, and the running time of the hydrogen concentration sensors moving at different positions; According to the initial position, moving speed and running time of each hydrogen concentration sensor, and the hydrogen concentration measured by each hydrogen concentration sensor at each test point, a diffusion cloud diagram of each test point, hydrogen concentration and running time is constructed, and the hydrogen leakage position is identified according to the diffusion cloud diagram.

[0036] In more embodiments, there are also provided: An electronic device comprising a memory and a processor, and computer instructions stored on the memory and running on the processor, when the computer instructions are run by the processor, the method described in embodiment one is completed. For brevity, this will not be repeated here.

[0037] It should be understood that in this embodiment, the processor can be a central processing unit CPU, and the processor can also be other general-purpose processors, digital signal processors DSP, application-specific integrated circuits ASIC, ready-to-program gate arrays FPGA or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0038] The memory can include read-only memory and random access memory, and provide instructions and data to the processor, and a part of the memory can also include non-volatile random access memory. For example, the memory can also store device type information.

[0039] A computer readable storage medium for storing computer instructions, when the computer instructions are executed by the processor, the method described in embodiment one is completed.

[0040] The method in the embodiment one can be directly embodied as being completed by a hardware processor or being completed by a combination of hardware and software modules in the processor. The software modules can be located in a storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, or the like. The storage medium is located in a memory, and the processor reads information in the memory and completes the steps of the above method in combination with the hardware. To avoid repetition, no further detailed description is given here.

[0041] A computer program product includes a computer program, which, when executed by a processor, implements the method described in the embodiment one.

[0042] The present application also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer executable instructions, for example, instructions embodied in program modules, executed by devices at the destination, real or virtual processors, to perform processes / methods as described above. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functions of the program modules can be combined or divided as desired in various embodiments. Machine executable instructions for program modules can be executed within a local or distributed device. In a distributed device, program modules can be located in local and remote storage media.

[0043] Computer program code for carrying out operations of the present application can be written in one or more programming languages. These computer program codes can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, so that the program codes, when executed by the computer or other programmable data processing apparatus, cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The program codes can be executed entirely on a computer, partially on a computer, as a standalone software package, partially on a computer and partially on a remote computer, or entirely on a remote computer or server.

[0044] In the context of the present application, computer program code or related data can be carried by any suitable carrier to enable a device, apparatus or processor to perform the various processes and operations described above. Examples of carriers include signals, computer readable media, and the like. Examples of signals can include electrical, optical, radio, sound or other forms of propagated signals, such as carrier waves, infrared signals, and the like.

[0045] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the present embodiment can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software manner depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0046] Although the specific embodiments of the present application are described above in combination with the drawings, it is not a limitation on the scope of protection of the present application. Those skilled in the art should understand that various modifications or variations made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A fuel cell bus hydrogen tank leak detection apparatus, characterized by, The application relates to a hydrogen leakage detection system. The multi-antenna variable-distance sensor support is arranged in a gas cylinder cabin, and hydrogen concentration sensors are arranged at different positions of the multi-antenna variable-distance sensor support. The central controller is used for constructing a diffusion cloud map of each test point, hydrogen concentration and running time according to the initial position, moving speed and running time of each hydrogen concentration sensor and the hydrogen concentration measured by each hydrogen concentration sensor at each test point, and identifying a hydrogen leakage position according to the diffusion cloud map. The multi-antenna variable-distance sensor support comprises a plurality of antenna supports which are driven by constant-speed air cylinders or low-speed motors.

2. A fuel cell bus hydrogen tank leak detection apparatus as set forth in claim 1, wherein The multi-antenna variable-distance sensor support transmits the height position and horizontal position information of the hydrogen concentration sensors to the central controller.

3. A fuel cell bus hydrogen tank leak detection apparatus as set forth in claim 1, wherein The central controller is used for dividing a region where hydrogen may leak and diffuse into a grid, calculating the hydrogen concentration between test points by interpolation, obtaining the hydrogen concentration estimation value and corresponding running time of all positions in the grid.

4. A fuel cell bus hydrogen tank leak detection apparatus as set forth in claim 1, wherein The application further comprises a display which is used for displaying the diffusion cloud map.

5. A fuel cell bus hydrogen tank leak detection apparatus as set forth in claim 1, wherein The application relates to a hydrogen leakage detection system.

6. A method of detecting a leak in a hydrogen tank of a fuel cell bus, the method comprising: The application relates to a hydrogen leakage detection system. The application relates to a hydrogen leakage detection system. The application relates to a hydrogen leakage detection system.

7. A method of detecting leaks in a hydrogen tank of a fuel cell bus, as defined in claim 6, wherein The application relates to a hydrogen leakage detection system.

8. An electronic device, comprising: ​ 9. A computer-readable storage medium, characterized in that, ​ 10. A computer program product, characterised in that, ​

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