A method for building a safety model for high-pressure hydrogen cylinders and a safety detection method

Abstract

The present application relates to the technical field of hydrogen cylinder safety detection, and in particular to a method for building a safety model for high-pressure hydrogen cylinders and a safety detection method, which includes: setting up several groups of bottle body solutions, loading several groups of bottle body solutions into different test environments for pre-testing, the bottle body solutions include bottle body materials, initial pressure, initial temperature, bottle body process, and bottle body structure; obtaining corresponding test results of different bottle body solutions based on pre-testing, and the test results include test temperature, test pressure, bottle body defects, and hydrogen leakage results; obtaining historical survey information to generate several safety reference tables, each safety reference table corresponds to a bottle body solution, and the safety reference table contains several safety test objects; based on the bottle body solution, test results and safety reference table, a safety model including an input layer, a hidden layer and an output layer is generated. The present application is used to achieve strong correlation of multiple detection results of hydrogen cylinders to improve detection results.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen cylinder safety testing, and in particular to a method for building a safety model for high-pressure hydrogen cylinders and a safety testing method. Background Art

[0002] With the rapid development of new energy vehicles, hydrogen as a new energy is widely used in new energy buses and some new energy cars, and high-pressure hydrogen cylinders are the main hydrogen storage equipment. Hydrogen has a low density, a large diffusion coefficient, low ignition energy, a wide combustion and explosion range, a fast combustion flame speed, and is easy to leak, flammable and explosive. Therefore, the safety of high-pressure hydrogen cylinders has attracted much attention.

[0003] Currently, the safety inspection of high-pressure hydrogen cylinders usually adopts a single inspection method, such as penetration testing and ultrasonic testing to perform non-destructive testing on the bottle body, and temperature and pressure sensors are used to detect the temperature and pressure changes inside the bottle.

[0004] However, the detection steps in the above method are all carried out independently, and there is no correlation between the various detection methods. When a high-pressure hydrogen cylinder has an abnormality, it is often caused by multiple factors. At the same time, there are also interrelated influences between multiple factors. If each test result is independent of each other, the test result will be inaccurate and cannot cover more safety hazards. Summary of the invention

[0005] In order to achieve strong correlation of multiple test results of hydrogen cylinders to improve the test results, the present application provides a method for building a safety model for high-pressure hydrogen cylinders and a safety testing method.

[0006] In the first aspect, the present application provides a method for building a safety model for a high-pressure hydrogen cylinder, using the following technical solution:

[0007] A method for building a high-pressure hydrogen cylinder safety model comprises the following steps:

[0008] Setting up several groups of bottle body solutions, and loading the several groups of bottle body solutions into different test environments for pre-testing, wherein the bottle body solutions include bottle body material, initial pressure, initial temperature, bottle body process, and bottle body structure;

[0009] Obtaining test results corresponding to different bottle solutions based on pre-testing, wherein the test results include test temperature, test pressure, bottle defects, and hydrogen leakage results;

[0010] Acquire historical survey information to generate a plurality of safety reference tables, each of which corresponds to one of the bottle solutions, and the safety reference tables contain a plurality of safety test objects;

[0011] A security model including an input layer, a hidden layer and an output layer is generated based on the bottle solution, the test results and the security reference table.

[0012] In some of the embodiments, several groups of bottle solutions are provided, specifically including the following steps:

[0013] Obtaining hydrogen cylinder application order information, wherein the hydrogen cylinder application order information includes the vehicle type and application requirements of the hydrogen cylinder application;

[0014] Generate simulated application information based on the hydrogen bottle application order information, and select the corresponding bottle body solution according to the simulated application information.

[0015] In some embodiments, the selection of the test environment specifically includes the following steps:

[0016] Obtaining hydrogen cylinder application environment information, wherein the hydrogen cylinder application environment information includes vehicle corresponding road condition information, natural environment information, and application industry use environment information;

[0017] The simulated driving environment information is generated based on the application environment information of the hydrogen cylinder, and a corresponding test environment is selected and formulated according to the simulated driving environment information.

[0018] In some of the embodiments, the safety test objects include leakage safety, explosion safety, and fire safety, and the safety reference table includes historical safety evaluation information of each of the safety test objects corresponding to its bottle information and environmental information.

[0019] In some embodiments, generating a security model including an input layer, a hidden layer and an output layer based on the bottle solution, the test results and the security reference table specifically includes the following steps:

[0020] Decomposing the bottle solution into input layers;

[0021] Decomposing the test results into hidden layers;

[0022] The plurality of security test objects in the security reference table are decomposed into output layers.

[0023] In some of the embodiments, after the security model is generated, the following steps are further included:

[0024] The influence weight of each factor in the security model corresponding to the next level is determined according to the hierarchical analysis method to obtain the correlation information of each level in the security model.

[0025] In the second aspect, the present application provides a high-pressure hydrogen cylinder safety detection method, which adopts the following technical solution:

[0026] A high-pressure hydrogen cylinder safety detection method is applied to the safety model constructed by the above-mentioned high-pressure hydrogen cylinder safety model construction method, comprising the following steps:

[0027] Perform real-time detection on the high-pressure hydrogen cylinders being used to obtain detection data, the detection data including real-time pressure, real-time temperature, bottle body defect information, and bottle body leakage information;

[0028] The bottle body information corresponding to the high-pressure hydrogen bottle being used is obtained, and the bottle body information and the detection data are input into the safety model to obtain a corresponding safety detection result.

[0029] In some of the embodiments, the following steps are also included:

[0030] A safety improvement plan is generated according to the safety test results, and the safety improvement plan is input into the safety model to obtain an optimal improvement plan, wherein the improvement plan includes one or more of raising and lowering the temperature, increasing and decreasing the pressure, adjusting the safety valve, and issuing an alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the steps of the method for building a high-voltage safety model in an embodiment of the present application. DETAILED DESCRIPTION

[0032] To more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. However, it should be understood by those of ordinary skill in the art that the present application can be implemented without these details. In some cases, in order to avoid unnecessary descriptions that make various aspects of the present application obscure, well-known methods, processes, systems, components and / or circuits that have been described at a higher level will not be described in detail. For those of ordinary skill in the art, it is obvious that various changes can be made to the embodiments disclosed in the present application, and without departing from the principles and scope of the present application, the general principles defined in the present application can be applied to other embodiments and application scenarios. Therefore, the present application is not limited to the embodiments shown, but conforms to the broadest scope consistent with the scope claimed for protection of the present application.

[0033] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as there is no conflict between them.

[0034] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples.

[0036] The embodiment of the present application discloses a method for building a safety model for a high-pressure hydrogen cylinder.

[0037] like Figure 1 As shown, a method for building a high-pressure hydrogen cylinder safety model includes the following steps:

[0038] S100, setting a plurality of bottle solutions, and loading the plurality of bottle solutions into different test environments for pre-testing.

[0039] The bottle body solution includes bottle body material, initial pressure, initial temperature, bottle body process, and bottle body structure.

[0040] The bottle body plan refers to the different materials, initial pressures and temperatures of the bottle body. Because the high-pressure hydrogen bottles required by different vehicles and produced by different companies are different, when testing, all possible and reasonable high-pressure hydrogen bottle body plans need to be combined for testing.

[0041] Specifically, setting up several groups of bottle solutions includes the following steps:

[0042] S110, obtaining hydrogen cylinder application order information.

[0043] The hydrogen cylinder application order information includes the vehicle type and application requirements of the hydrogen cylinder application.

[0044] When testing a hydrogen cylinder, it is necessary to first obtain the application order information corresponding to the high-pressure hydrogen cylinder to be tested, that is, whether the hydrogen cylinder is used for a sedan, bus or SUV, and whether the vehicle corresponding to the hydrogen cylinder is used for hybrid drive or hydrogen drive.

[0045] Because different hydrogen cylinders correspond to different vehicle types and application requirements, the corresponding usage requirements of hydrogen cylinders are different, and the probability of corresponding safety hazards is also different. For example, if hydrogen cylinders are used in cars and buses, buses are heavier and require more power than cars, so the number, capacity, pressure, etc. of hydrogen cylinders required are different from those of cars.

[0046] S111, generating simulated application information based on the hydrogen cylinder application order information, and selecting a corresponding cylinder solution according to the simulated application information.

[0047] After obtaining the hydrogen cylinder application order information, simulated application information is generated based on the information. The simulated application information is characterized by simulating the future application object of the hydrogen cylinder to simulate what kind of bottle solution is needed to meet the requirements of a certain vehicle or a certain application requirement.

[0048] At the same time, because different hydrogen cylinders correspond to different vehicles and their driving environments are also different, different test environments need to be loaded for different bottle solutions, which specifically include the following steps:

[0049] S120, obtaining the application environment information of the hydrogen cylinder.

[0050] The application environment information of hydrogen cylinders includes the vehicle's corresponding road condition information, natural environment information, and application industry usage environment information.

[0051] The road condition information is characterized by whether the vehicle is traveling on a rural or urban road, and whether there are many traffic jams in the rural or urban area.

[0052] The natural environment information indicates whether the vehicle is traveling in a mountainous area, a plateau, a cold area, or the like.

[0053] The application industry uses environmental information to ensure whether it is an operating vehicle, engineering vehicle, etc.

[0054] S121, generating simulated driving environment information based on the application environment information of the hydrogen cylinder, and selecting and formulating a corresponding test environment according to the simulated driving environment information.

[0055] Because different driving environments and different application environments put different dynamic pressures on the vehicle, the corresponding potential safety hazards are also different in size.

[0056] Then it is necessary to generate simulated driving environment information based on the application environment information of the hydrogen cylinder to formulate a corresponding test environment. Through different test environments, targeted simulation pre-tests can be performed on different hydrogen cylinders.

[0057] S200, obtaining corresponding test results of different bottle solutions based on the pre-test.

[0058] The test results include test temperature, test pressure, bottle defects, and hydrogen leakage results.

[0059] After pre-testing each bottle solution, the test results generated by different bottle solutions under the corresponding test environment can be obtained. The test results are mainly characterized by the corresponding test results of the hydrogen cylinder in a simulated environment, simulated daily use, simulated maximum pressure use, etc., which are generally expressed as a test result curve.

[0060] At the same time, the test pressure of the hydrogen cylinder can be increased to cause safety problems such as combustion, explosion, leakage, etc., so as to obtain extreme test data.

[0061] S300, obtaining historical research information to generate a plurality of safety reference tables, each of which corresponds to a bottle solution.

[0062] The safety reference table contains several safety test objects, and the safety test objects include leakage safety, explosion safety, and fire safety. Leakage, explosion, and fire are the most likely safety hazards due to the flammable, explosive, and leaky properties of hydrogen.

[0063] The safety reference table includes the historical safety evaluation information of each safety test object corresponding to its bottle information and environmental information.

[0064] The information included in the safety reference table is represented as follows: xx material, xx initial pressure, xx initial temperature under xx environment corresponds to leakage safety of xx, explosion safety of xx, and fire safety of xx. All of this information is obtained based on past historical safety evaluation information, which can be obtained based on past operating data and offline surveys.

[0065] S400, generating a security model including an input layer, a hidden layer and an output layer based on the bottle solution, the test results and the security reference table.

[0066] The specific steps include:

[0067] S410, decomposing the bottle solution into an input layer.

[0068] The input layer represents the specific parameters such as materials, processes, structures, etc. corresponding to the hydrogen cylinder after it is determined.

[0069] S420, decomposing the test result into hidden layers.

[0070] The hidden layer is used to set the quantitative parameters formed by a single or combined input layer, such as the test results corresponding to the combination of different materials, processes, structures and other information, such as test pressure, test temperature, whether there is a fire, whether there is an explosion, maximum load pressure, maximum temperature and other information.

[0071] S430, decomposing a plurality of security test objects in the security reference table into output layers.

[0072] The output layer corresponds to the safety test objects generated according to the test results during the test process, which are represented by the dimensions corresponding to the safety evaluation of hydrogen cylinders, such as fire safety, leakage safety, explosion safety, etc.

[0073] After the security model is generated, the following steps are included:

[0074] S500, determining the influence weight of each factor in the security model corresponding to the next level according to the hierarchical analysis method, so as to obtain the correlation information of each level in the security model.

[0075] The neural network model in the embodiment of the present application has relatively good nonlinear approximation ability, and can accurately find the relationship between various parameters through self-learning and self-adaptation capabilities.

[0076] The present application also discloses a high-pressure hydrogen cylinder safety detection method, which is applied to the safety model constructed by the above-mentioned high-pressure hydrogen cylinder safety model construction method, and includes the following steps:

[0077] S600, performs real-time detection on the high-pressure hydrogen cylinders being used to obtain detection data.

[0078] The detection data includes real-time pressure, real-time temperature, bottle defect information, and bottle leakage information.

[0079] S610, obtaining the bottle body information corresponding to the high-pressure hydrogen bottle being used, and inputting the bottle body information and the detection data into the safety model to obtain the corresponding safety detection result.

[0080] After the safety model is built, during the subsequent operation, various data in the hydrogen cylinder are detected in real time, including but not limited to detecting other temperatures in the hydrogen cylinder through temperature sensors, detecting the air pressure in the hydrogen cylinder through pressure sensors, and detecting appearance defects of the hydrogen cylinder through visual shooting modules.

[0081] After the various parameters are detected and input into the safety detection module, the corresponding safety data can be obtained according to the neural network algorithm, such as whether there are safety hazards such as explosion, fire, and leakage, and what the safety value is.

[0082] In this way, real-time detection of high-pressure hydrogen cylinders can be achieved. At the same time, because a multi-layer neural network model is used, there is a strong correlation between the various parameters. The impact of changes in different parameters on other parallel parameters is also recorded by the neural network model, making the detection results more accurate.

[0083] In some other embodiments, the following steps are also included:

[0084] S620, generating a security improvement plan according to the security detection result, and inputting the security improvement plan into the security model to obtain an optimal improvement plan.

[0085] The improvement plan includes one or more of raising or lowering the temperature, increasing or decreasing the pressure, adjusting the safety valve, and issuing an alarm.

[0086] At the same time, the safety model in this application can also realize reverse safety prediction implementation. For example, after various types of detection data are detected, they are input into the safety model, and the results of various safety test objects obtained are explosion safety a, leakage safety b, and fire safety a, where a represents the value without safety hazards, and b represents the value with safety hazards.

[0087] Then you can input a safety improvement plan corresponding to the target result. For example, you need to improve leakage safety b to leakage safety a. After inputting the safety improvement plan into the value safety model, you can get the optimal improvement plan, such as cooling the hydrogen cylinder, adjusting a safety valve, and issuing an alarm to remind the driver.

[0088] The implementation principle is:

[0089] A multi-layer neural network model is used to ensure a strong correlation between various parameters. The impact of changes in different parameters on other parallel parameters is also recorded by the neural network model, making the detection results more accurate and covering more safety hazards.

[0090] It should be understood that although the steps in the flowchart of the accompanying drawings are shown in sequence according to the instructions of the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise clearly stated in this document, the execution of these steps is not strictly limited in order and can be performed in other orders.

[0091] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for building a safety model for a high-pressure hydrogen cylinder, characterized in that: The following steps are involved: Setting up several groups of bottle solutions, and loading the several groups of bottle solutions into different test environments for pre-testing, wherein the bottle solutions include bottle material, initial pressure, initial temperature, bottle process, and bottle structure; Setting up several groups of bottle solutions includes the following steps: Obtain hydrogen cylinder application order information, which includes the vehicle type and application requirements of hydrogen cylinder applications, generate simulated application information based on the hydrogen cylinder application order information, and select a corresponding cylinder solution based on the simulated application information; Loading several groups of the bottle solutions into different test environments for pre-testing includes the following steps: Obtaining hydrogen cylinder application environment information, wherein the hydrogen cylinder application environment information includes vehicle corresponding road condition information, natural environment information, and application industry use environment information; generating simulated driving environment information based on the hydrogen cylinder application environment information, and selecting and formulating a corresponding test environment according to the simulated driving environment information; Obtaining test results corresponding to different bottle solutions based on pre-testing, wherein the test results include test temperature, test pressure, bottle defects, and hydrogen leakage results; Acquire historical survey information to generate a plurality of safety reference tables, each of which corresponds to one of the bottle solutions, and the safety reference tables contain a plurality of safety test objects; A safety model including an input layer, a hidden layer and an output layer is generated based on the bottle solution, the test results and the safety reference table; the bottle solution is decomposed into an input layer, and the input layer is characterized by specific parameters of materials, processes and structures corresponding to the hydrogen bottle after it is determined; the test results are decomposed into a hidden layer; and several safety test objects in the safety reference table are decomposed into an output layer.

2. The method for building a high-pressure hydrogen cylinder safety model according to claim 1, characterized in that: The safety test objects include leakage safety, explosion safety, and fire safety, and the safety reference table includes historical safety evaluation information of each of the safety test objects corresponding to its bottle information and environmental information.

3. The method for building a high-pressure hydrogen cylinder safety model according to claim 1, characterized in that: After the security model is generated, the following steps are included: The influence weight of each factor in the security model corresponding to the next level is determined according to the hierarchical analysis method to obtain the correlation information of each level in the security model.

4. A method for detecting the safety of a high-pressure hydrogen cylinder, characterized in that: The safety model constructed by the method for constructing a safety model for a high-pressure hydrogen cylinder as claimed in any one of claims 1 to 3 comprises the following steps: Perform real-time detection on the high-pressure hydrogen cylinders being used to obtain detection data, the detection data including real-time pressure, real-time temperature, bottle body defect information, and bottle body leakage information; The bottle body information corresponding to the high-pressure hydrogen bottle being used is obtained, and the bottle body information and the detection data are input into the safety model to obtain a corresponding safety detection result.

5. The high-pressure hydrogen cylinder safety detection method according to claim 4 is characterized in that: The following steps are also included: A safety improvement plan is generated according to the safety test results, and the safety improvement plan is input into the safety model to obtain an optimal improvement plan, wherein the improvement plan includes one or more of raising and lowering the temperature, increasing and decreasing the pressure, adjusting the safety valve, and issuing an alarm.

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