A hydrogen storage cylinder for vehicle and a method for determining the state of a hydrogen storage cylinder for vehicle

Abstract

This application provides a vehicle-mounted hydrogen storage cylinder and a method for determining its state. By incorporating multiple sensors, receiving modules, and computing modules within the cylinder, it comprehensively acquires multi-source data, including pressure, temperature, hydrogen flow rate during operation, and calibration parameters. Based on this multi-source data, it performs fusion calculations to determine the cylinder's state, thereby achieving a multi-dimensional characterization of its operational status. In particular, by constructing a weighted calculation relationship between pressure deviation, hydrogen flow rate, and real-time temperature, the thermal state of the cylinder is quantitatively assessed, effectively reflecting the thermal coupling characteristics during hydrogen filling and discharging. This application significantly improves the accuracy and comprehensiveness of hydrogen storage cylinder state assessment, ensuring that the acquired state information not only reflects the current operating status but also provides a reliable basis for health status analysis, remaining life assessment, and predictive maintenance.

Description

Technical Field

[0001] This application relates to the field of clean energy vehicle technology, and more specifically, to a vehicle-mounted hydrogen storage cylinder and a method for determining the state of the vehicle-mounted hydrogen storage cylinder. Background Technology

[0002] With the development of hydrogen fuel cell vehicles, the safety of hydrogen storage tanks under high-pressure filling and discharging conditions has become an increasingly important concern. In actual operation, the internal state of the hydrogen storage tank is affected by a variety of factors.

[0003] In existing technologies, the monitoring of the operating status of hydrogen storage cylinders is usually based on a single parameter, such as detecting whether the internal temperature or pressure exceeds a preset threshold to issue a safety warning. However, this type of method has only one evaluation dimension and cannot provide comprehensive information about the hydrogen storage cylinder, making it difficult to support predictive maintenance and system optimization decisions. Summary of the Invention

[0004] In view of this, this application provides a vehicle hydrogen storage cylinder and a method for determining the state of a vehicle hydrogen storage cylinder, in order to solve the problem that the existing technology has a single evaluation dimension, cannot provide comprehensive information reflecting the hydrogen storage cylinder, and is difficult to support predictive maintenance and system optimization decisions.

[0005] Specifically, this application is implemented through the following technical solution: In a first aspect, this application provides a vehicle hydrogen storage cylinder, including a cylinder body, multiple sensors, a receiving module, a storage module, and a computing module; The various sensors are used to collect a first parameter of the bottle body in multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the bottle body, real-time temperature inside the bottle body, impact force of the bottle body, and gas composition outside the bottle body. The receiving module is used to receive second parameters during each hydrogen filling and discharging process of the bottle at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the hydrogen filling and discharging process; The storage module is used to store the pre-calibrated third parameters of the cylinder; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions; The calculation module is used to determine the status information of the vehicle-mounted hydrogen storage cylinder based on the first parameter, the second parameter, and the third parameter; the status information includes one or more of the following: remaining hydrogen quantity, thermal state, safety state, number of hydrogen filling / discharging cycles, remaining lifespan of the hydrogen cylinder, and health state; wherein, when determining the thermal state, the calculation module is specifically used for: Determine a first difference between the real-time pressure and the rated pressure, and determine a first ratio between the first difference and the rated pressure; Based on the fitting coefficients corresponding to the first ratio and the hydrogen flow rate, the first ratio, the hydrogen flow rate, and the real-time temperature are weighted and summed to obtain the thermal state.

[0006] In some embodiments, the first parameter includes the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle; The calculation module is specifically used for: The safety status is determined based on the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle.

[0007] In some embodiments, the second parameter further includes the start and end timestamps of each hydrogen charging and discharging process performed by the cylinder at the hydrogen refueling station; the third parameter further includes a pressure change threshold for the cylinder during a complete hydrogen charging and discharging process; the calculation module is specifically used for: For any of the hydrogen charging and discharging processes, based on the start timestamp and end timestamp, the starting pressure and ending pressure of each hydrogen charging and discharging process are determined from the historical information of the real-time pressure inside the bottle. Determine a second difference between the internal pressure of the ending bottle and the internal pressure of the starting bottle, and a second ratio between the second difference and the pressure change threshold; Based on the second ratio and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charge-discharge cycles corresponding to the hydrogen charge-discharge process is determined; The number of hydrogen charge / discharge cycles is determined based on the equivalent number of hydrogen charge / discharge cycles corresponding to each of the aforementioned hydrogen charge / discharge processes.

[0008] In some implementations, the computing module is specifically used for: Based on the thermal state corresponding to the hydrogen charging and discharging process, the fitting coefficient corresponding to the thermal state, the second ratio, and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charging and discharging cycles corresponding to the hydrogen charging and discharging process is determined.

[0009] In some implementations, the third parameter includes the rated number of hydrogen charge / discharge cycles of the bottle; the calculation module is specifically used for: The remaining life of the hydrogen cylinder is determined based on the number of hydrogen charge / discharge cycles and the rated number of hydrogen charge / discharge cycles. The health status is determined based on the remaining lifespan of the hydrogen cylinder and the rated number of hydrogen charge / discharge cycles.

[0010] In some implementations, the computing module is specifically used for: The remaining amount of hydrogen is determined based on a third ratio of the real-time pressure to the rated pressure, and a fourth ratio of the rated temperature to the real-time temperature.

[0011] In some implementations, the computing module is further used for: The status information is sent to the vehicle control terminal; the vehicle control terminal is used to control the vehicle and / or the vehicle hydrogen storage cylinder based on the status information.

[0012] Secondly, this application also provides a method for determining the state of a vehicle-mounted hydrogen storage cylinder, including: The first parameter of the vehicle hydrogen storage tank body is obtained under multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the tank body, real-time temperature inside the tank body, impact force of the tank body, and gas composition outside the tank body. Receive second parameters from the various hydrogen charging and discharging processes performed on the cylinder at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the charging and discharging processes; Obtain the pre-calibrated third parameters of the cylinder; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions; Based on the first parameter, the second parameter, and the third parameter, the status information of the vehicle hydrogen storage cylinder is determined; the status information includes one or more of the following: hydrogen remaining quantity, thermal state, safety state, number of hydrogen filling and discharging cycles, remaining lifespan of the hydrogen cylinder, and health state. Specifically, determining the state information of the vehicle-mounted hydrogen storage cylinder when determining the thermal state includes: Determine a first difference between the real-time pressure and the rated pressure, and determine a first ratio between the first difference and the rated pressure; Based on the fitting coefficients corresponding to the first ratio and the hydrogen flow rate, the first ratio, the hydrogen flow rate, and the real-time temperature are weighted and summed to obtain the thermal state.

[0013] In some embodiments, the first parameter includes the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle; Determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: The safety status is determined based on the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle.

[0014] In some embodiments, the second parameter further includes the start and end timestamps of each hydrogen charging and discharging process performed by the cylinder at the hydrogen refueling station; the third parameter further includes the pressure change threshold of the cylinder during a complete hydrogen charging and discharging process. Determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: For any of the hydrogen charging and discharging processes, based on the start timestamp and end timestamp, the starting pressure and ending pressure of each hydrogen charging and discharging process are determined from the historical information of the real-time pressure inside the bottle. Determine a second difference between the internal pressure of the ending bottle and the internal pressure of the starting bottle, and a second ratio between the second difference and the pressure change threshold; Based on the second ratio and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charge-discharge cycles corresponding to the hydrogen charge-discharge process is determined; The number of hydrogen charge / discharge cycles is determined based on the equivalent number of hydrogen charge / discharge cycles corresponding to each of the aforementioned hydrogen charge / discharge processes.

[0015] In some implementations, determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: Based on the thermal state corresponding to the hydrogen charging and discharging process, the fitting coefficient corresponding to the thermal state, the second ratio, and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charging and discharging cycles corresponding to the hydrogen charging and discharging process is determined.

[0016] In some embodiments, the third parameter includes the rated number of hydrogen charge / discharge cycles of the bottle; Determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: The remaining life of the hydrogen cylinder is determined based on the number of hydrogen charge / discharge cycles and the rated number of hydrogen charge / discharge cycles. The health status is determined based on the remaining lifespan of the hydrogen cylinder and the rated number of hydrogen charge / discharge cycles.

[0017] In some implementations, determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: The remaining amount of hydrogen is determined based on a third ratio of the real-time pressure to the rated pressure, and a fourth ratio of the rated temperature to the real-time temperature.

[0018] In some embodiments, the method further includes: The status information is sent to the vehicle control terminal; the vehicle control terminal is used to control the vehicle and / or the vehicle hydrogen storage cylinder based on the status information.

[0019] Thirdly, this application also provides a computer device, including a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and the processor is configured to execute the machine-readable instructions stored in the memory, wherein when the machine-readable instructions are executed by the processor, they perform the steps of the second aspect above, or any possible implementation of the second aspect.

[0020] Fourthly, this application also provides a computer-readable storage medium storing a computer program that, when run, performs the steps of the second aspect above, or any possible implementation of the second aspect.

[0021] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and are not intended to limit the technical solutions of this application.

[0022] The vehicle-mounted hydrogen storage cylinder and its state determination method provided in this application embodiment, by setting multiple sensors, receiving modules, and computing modules in the vehicle-mounted hydrogen storage cylinder, comprehensively acquires multi-source data such as pressure, temperature, hydrogen filling and discharging flow rates, and calibration parameters during the operation of the hydrogen storage cylinder, and performs fusion calculations based on the multi-source data to achieve a multi-dimensional characterization of the hydrogen storage cylinder's operating state. In particular, by constructing a weighted calculation relationship between pressure deviation, hydrogen flow rate, and real-time temperature, the thermal state of the hydrogen storage cylinder is quantitatively evaluated, which can effectively reflect the thermal coupling characteristics during the hydrogen filling and discharging process. Compared with the existing technology based on a single parameter threshold judgment method, this application can significantly improve the accuracy and comprehensiveness of the hydrogen storage cylinder state assessment, so that the acquired state information can not only reflect the current operating state, but also provide a reliable basis for the health status analysis, remaining life assessment, and predictive maintenance of the hydrogen storage cylinder, thereby improving the operational safety of the hydrogen storage system and the scientific nature of the overall control decision. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an exemplary embodiment of the present application illustrating a vehicle-mounted hydrogen storage cylinder; Figure 2 This is a flowchart illustrating an exemplary embodiment of a method for determining the state of a vehicle-mounted hydrogen storage cylinder; Figure 3 This is a schematic diagram of a computer device illustrated in an exemplary embodiment of this application. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0025] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0027] Research has revealed that current technologies for monitoring the operational status of hydrogen storage cylinders typically rely on a single parameter, such as detecting whether the internal temperature or pressure exceeds a preset threshold to issue a safety warning. However, such methods offer only a single evaluation dimension, failing to provide comprehensive information about the hydrogen storage cylinder and thus hindering predictive maintenance and system optimization decisions.

[0028] In view of this, this application provides a vehicle hydrogen storage cylinder and a method for determining the state of a vehicle hydrogen storage cylinder, in order to solve the problem that the existing technology has a single evaluation dimension, cannot provide comprehensive information reflecting the hydrogen storage cylinder, and is difficult to support predictive maintenance and system optimization decisions.

[0029] The deficiencies of the existing technical solutions are the result of the inventor's practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this application below should be considered as the inventor's contributions to this application.

[0030] To facilitate understanding of this embodiment, the application scenarios of the vehicle-mounted hydrogen storage cylinder and the method for determining the state of the vehicle-mounted hydrogen storage cylinder disclosed in this application embodiment are first introduced. The vehicle-mounted hydrogen storage cylinder provided in this application embodiment can be deployed on hydrogen-powered vehicles, providing hydrogen to the vehicles and enabling them to generate power using hydrogen. The execution entity of the method for determining the state of the vehicle-mounted hydrogen storage cylinder can be a computer device, such as the computing module corresponding to the vehicle-mounted hydrogen storage cylinder. In some possible implementations, the method for determining the state of the vehicle-mounted hydrogen storage cylinder can be implemented by a processor calling computer-readable instructions stored in memory.

[0031] See Figure 1The diagram shown is a schematic representation of an exemplary embodiment of this application of a vehicle-mounted hydrogen storage cylinder. The vehicle-mounted hydrogen storage cylinder includes a cylinder body 11, various sensors 12, a receiving module 13, a storage module 14, and a computing module 15.

[0032] The various sensors 12 are used to collect a first parameter of the bottle 11 in multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the bottle 11, real-time temperature inside the bottle 11, impact force of the bottle 11, and gas composition outside the bottle 11. The receiving module 13 is used to receive second parameters of the bottle 11 during each hydrogen charging and discharging process at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the hydrogen charging and discharging process; The storage module 14 is used to store the pre-calibrated third parameters of the bottle 11; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions. The calculation module 15 is used to determine the status information of the vehicle-mounted hydrogen storage cylinder based on the first parameter, the second parameter, and the third parameter; the status information includes one or more of the following: remaining hydrogen quantity, thermal state, safety state, number of hydrogen filling / discharging cycles, remaining lifespan of the hydrogen cylinder, and health state; wherein, when determining the thermal state, the calculation module 15 is specifically used to: Determine a first difference between the real-time pressure and the rated pressure, and determine a first ratio between the first difference and the rated pressure; Based on the fitting coefficients corresponding to the first ratio and the hydrogen flow rate, the first ratio, the hydrogen flow rate, and the real-time temperature are weighted and summed to obtain the thermal state.

[0033] The cylinder body is used to store high-pressure hydrogen gas and serves as a mounting carrier for various sensors and functional modules. Multiple sensors are positioned at predetermined locations within the cylinder body to collect multi-dimensional physical parameters of the hydrogen storage cylinder in real time during operation. These sensors include, but are not limited to, pressure sensors, temperature sensors, impact sensors, and gas composition sensors. Specifically, the pressure sensor collects real-time pressure inside the cylinder, the temperature sensor collects real-time temperature inside the cylinder, the impact sensor detects the intensity of external impacts on the hydrogen storage cylinder, and the gas composition sensor detects the hydrogen concentration in the external environment. The parameters collected by these sensors constitute the first parameter.

[0034] The pressure sensor can be located inside the bottle and / or at the bottle opening; the temperature sensor can adopt a single-point temperature measurement or multi-point distributed temperature measurement structure, for example, multiple temperature measurement points can be arranged at the bottle opening or along the axial direction of the bottle; the collision sensor can be an accelerometer; and the gas composition sensor can be located outside the bottle or inside the vehicle compartment.

[0035] For example, the temperature sensor can be a fiber optic temperature sensor; the pressure sensor can be a high-precision piezoresistive or fiber optic pressure sensor; and the gas composition sensor can be a semiconductor or electrochemical hydrogen sensor.

[0036] In some embodiments, the bottle body can be a Type III or Type IV high-pressure hydrogen storage cylinder as specified in the hydrogen storage cylinder standard. For example, the bottle body may include a plastic inner liner and an outer carbon fiber reinforced composite winding layer to achieve both lightweight and high strength performance; as another example, the bottle body may also adopt a metal inner liner and composite material covering structure to improve impact resistance.

[0037] The receiving module communicates with the hydrogen refueling station or vehicle control system to acquire operational data of the hydrogen storage tank during the filling or discharging process, specifically including parameters such as hydrogen flow rate. These parameters are input to the calculation module as the second parameter. By introducing dynamic parameters during the filling and discharging process, the state assessment can reflect changes in actual operating conditions.

[0038] In some embodiments, the receiving module can receive data via wired or wireless means. For example, it can receive data via a Controller Area Network (CAN) bus, Bluetooth, Wi-Fi, or a dedicated short-range communication protocol.

[0039] Furthermore, the receiving module can also receive hydrogen charging start / end flag signals to help identify the hydrogen charging / discharging stages.

[0040] In some embodiments, the hydrogen flow rate can be obtained directly from the metering equipment at the hydrogen refueling station, or indirectly estimated through the pressure change rate.

[0041] The storage module is used to store the calibration data of the hydrogen storage cylinder, namely the third parameter. The third parameter includes the rated pressure and rated temperature of the hydrogen storage cylinder under rated operating conditions, which are used as a reference benchmark for condition assessment.

[0042] In some embodiments, the storage module can be a non-volatile memory, such as EEPROM, Flash memory, or embedded memory chip; the stored data may include the factory calibration data of the hydrogen storage cylinder (rated pressure, rated temperature, volume, etc.), historical operating data (pressure, temperature, number of cycles, etc.), historical maintenance data, etc.

[0043] Furthermore, the storage module can also store fitting coefficients and model parameters to support state calculations.

[0044] In some embodiments, the storage module may support data updates to adapt to different operating conditions or calibration corrections.

[0045] The computing module can be connected to the various sensors, receiving module, and storage module respectively, and is used to fuse the first parameter, the second parameter, and the third parameter to determine the status information of the hydrogen storage cylinder. The status information includes one or more of the following: remaining hydrogen quantity, thermal state, safety state, number of hydrogen charging / discharging cycles, remaining lifespan of the hydrogen cylinder, and health status.

[0046] When determining the thermal state, the calculation module does not rely on a single temperature parameter. Instead, it constructs a multi-parameter joint evaluation model by combining the degree of pressure deviation, hydrogen flow rate, and real-time temperature. Specifically, it first determines the difference between the real-time pressure and the rated pressure, and then calculates the ratio of this difference to the rated pressure to characterize the degree of pressure deviation. Subsequently, based on pre-calibrated fitting coefficients, it performs a weighted summation of the pressure deviation ratio, hydrogen flow rate, and real-time temperature to obtain the thermal state parameters reflecting the overall thermal effect of the hydrogen storage cylinder.

[0047] For example, the thermal state can be determined using the following formula: ; in, The flow rate of hydrogen gas. and These are the fitting coefficients. The actual pressure measured by the sensor. The real-time temperature measured by the sensor. This is the rated pressure. The above fitting parameters can be calibrated using experimental data to adjust the influence of pressure and hydrogen flow rate on temperature changes.

[0048] By coupling the calculations of pressure changes, hydrogen charging and discharging dynamics, and temperature changes in the above method, the true thermal state of the hydrogen storage cylinder under dynamic operating conditions can be reflected more accurately, overcoming the problem that single temperature monitoring is difficult to identify local overheating or potential thermal risks.

[0049] Furthermore, the calculation module can also comprehensively evaluate the operating status of the hydrogen storage cylinder based on the state information calculated from the above multi-source parameters, and provide a data foundation for subsequent safety warning and control strategies.

[0050] In one embodiment of this application, the first parameter is used to characterize the safety-related operating status of the hydrogen storage cylinder, specifically including the real-time pressure inside the cylinder, the impact force of the cylinder, and the gas composition outside the cylinder.

[0051] The calculation module comprehensively determines the safety status of the hydrogen storage cylinder based on the aforementioned multiple safety-related parameters. In a specific implementation, the calculation module can employ a multi-channel parallel judgment mechanism to independently assess different types of safety risks and comprehensively determine the safety status of the hydrogen storage cylinder.

[0052] Specifically, in some embodiments, determining the security status includes the following process: Based on the real-time pressure inside the cylinder, it is determined whether the hydrogen storage cylinder is in an abnormal pressure state. When the real-time pressure exceeds a preset safe pressure threshold, it is determined that there is an overpressure risk; in a further embodiment, the risk of abnormal pressure fluctuation can also be determined based on the pressure change rate.

[0053] Based on the impact force of the cylinder, it is determined whether the hydrogen storage cylinder has been subjected to external impact. When the impact force exceeds a preset impact threshold, it is determined that the hydrogen storage cylinder may be at risk of structural damage. In some embodiments, the risk level can be further classified by combining the impact duration or impact direction.

[0054] Based on the gas composition outside the bottle, a risk of hydrogen leakage is determined. Specifically, the hydrogen concentration in the environment surrounding the bottle is detected and compared with a preset concentration threshold. When the hydrogen concentration exceeds the threshold, a leakage risk is determined.

[0055] Based on the above risk assessments, the calculation module can determine the final safety status through logical combination. In a preferred embodiment, a logical "OR" relationship is used for fusion, that is, when any risk assessment result meets the abnormal condition, the hydrogen storage cylinder is determined to be in an abnormal safety state.

[0056] In other embodiments, different weights or priorities can be set according to different risk types to achieve a more refined safety status assessment. For example, hydrogen leakage risk can be given a high priority, and a high-risk safety status can be directly determined when a leakage risk is detected.

[0057] In some implementations, the safety status may simultaneously include pressure, impact force, and status information corresponding to gas composition.

[0058] By integrating multiple safety risks such as abnormal pressure, collision impact, and gas leakage in the above manner, we can avoid misjudgment or omission caused by judging a single parameter, thereby improving the accuracy and reliability of hydrogen storage cylinder safety status assessment.

[0059] In one embodiment of this application, in order to accurately characterize the fatigue cumulative effect of the hydrogen storage cylinder under incomplete hydrogen charging and discharging conditions, the second parameter also includes the start and end timestamps of each hydrogen charging and discharging process of the hydrogen storage cylinder at the hydrogen refueling station, and the third parameter also includes the pressure change threshold of the hydrogen storage cylinder during a complete hydrogen charging and discharging process.

[0060] The calculation module performs an equivalent calculation of the number of hydrogen charging and discharging cycles of the hydrogen storage cylinder based on the above parameters, so as to reflect the cumulative usage of the hydrogen storage cylinder in actual operation.

[0061] Specifically, in one embodiment, for any hydrogen charging or discharging process, the calculation module first extracts the pressure change data within the corresponding time interval from the historical data of the real-time pressure inside the bottle based on the start timestamp and the end timestamp, and determines the start pressure inside the bottle and the end pressure inside the bottle for the hydrogen charging or discharging process.

[0062] Furthermore, the calculation module determines the pressure change corresponding to the hydrogen charging and discharging process based on the difference between the internal pressure of the initial bottle and the internal pressure of the final bottle, and calculates the ratio between the pressure change and the pressure change threshold to characterize the equivalence of the hydrogen charging and discharging process relative to a complete hydrogen charging and discharging cycle.

[0063] Based on this, the calculation module normalizes the hydrogen charging and discharging process using the second ratio and its corresponding fitting coefficient, thereby obtaining the equivalent number of hydrogen charging and discharging cycles corresponding to the process. The fitting coefficient can be obtained through experimental calibration and is used to correct for the nonlinear effects of pressure changes on material fatigue under different operating conditions.

[0064] For example, the equivalent number of hydrogen charge-discharge cycles can be expressed by the following formula: ; in, Indicates the equivalent number of hydrogen charge / discharge cycles. This represents the fitting coefficient corresponding to the second ratio. This indicates the end of the internal pressure test in the bottle. This indicates the initial internal pressure of the bottle. This indicates the threshold for pressure change.

[0065] Furthermore, for multiple hydrogen charging and discharging processes, the calculation module accumulates the equivalent number of hydrogen charging and discharging cycles corresponding to each process to determine the cumulative number of hydrogen charging and discharging cycles for the hydrogen storage cylinder.

[0066] By using the above method, the incomplete hydrogen charging and discharging process in actual operation is transformed into an equivalent number of complete cycles, which can more accurately reflect the fatigue accumulation of hydrogen storage cylinders. Compared with the method of statistical analysis based solely on the number of complete hydrogen charging and discharging cycles, this method significantly improves the accuracy of cycle number assessment and provides a more reliable basis for assessing the remaining life of hydrogen storage cylinders and analyzing their health status.

[0067] In one embodiment of this application, to further improve the accuracy of the hydrogen charge / discharge cycle number assessment, the calculation module also introduces the thermal state during the hydrogen charge / discharge process as a correction factor when determining the equivalent hydrogen charge / discharge cycle number.

[0068] Specifically, for any hydrogen charging / discharging process, based on the second ratio determined by pressure change, the calculation module further obtains the corresponding thermal state parameters for that process. The thermal state is used to characterize the temperature rise and heat load during the hydrogen charging / discharging process, and can be calculated by integrating parameters such as real-time temperature, pressure, and hydrogen flow rate.

[0069] In a preferred embodiment, the calculation module is based on the second ratio and its corresponding first fitting coefficient (i.e. The cyclic contribution characterized by pressure changes is initially quantified; at the same time, the temperature-related thermal effects are corrected and quantified based on the thermal state and its corresponding second fitting coefficient.

[0070] Furthermore, the calculation module couples the cycle contribution corresponding to the second ratio with the correction factor corresponding to the thermal state to determine the equivalent number of hydrogen charge / discharge cycles corresponding to the hydrogen charge / discharge process. In one embodiment, the coupling calculation can be performed using a weighted summation method; in other embodiments, a multiplicative correction or nonlinear function mapping method can also be used to reflect the amplification effect of the thermal state on material fatigue damage.

[0071] For example, in some embodiments, when the thermal state is at a higher level, the corresponding correction factor increases, thereby increasing the equivalent number of hydrogen charge / discharge cycles under the same pressure change conditions; while when the thermal state is lower, the correction factor decreases, thereby reducing the contribution of the hydrogen charge / discharge process to the cumulative number of cycles.

[0072] For example, the equivalent number of hydrogen charge-discharge cycles can be expressed by the following formula: ; in, represents the second fitting coefficient, and SOT represents the thermal state.

[0073] By jointly modeling pressure changes and thermal state factors during the hydrogen charging and discharging process using the above method, the fatigue accumulation process of hydrogen storage cylinders under complex operating conditions can be more realistically reflected. Compared with the method of counting cycles based solely on pressure changes, this embodiment considers the influence of temperature on material properties and damage evolution, thereby significantly improving the accuracy of calculating the equivalent hydrogen charging and discharging cycle count and providing a more reliable basis for assessing the remaining life of hydrogen storage cylinders and analyzing their health status.

[0074] In one embodiment of this application, the third parameter further includes the rated number of hydrogen charging and discharging cycles of the hydrogen storage cylinder. The rated number of hydrogen charging and discharging cycles can be preset according to relevant standards or type test results, for example, determined based on the maximum number of cycles obtained from the fatigue life test of the hydrogen storage cylinder.

[0075] The calculation module estimates the remaining lifespan of the hydrogen storage cylinder based on the cumulative number of hydrogen charge / discharge cycles and the rated number of hydrogen charge / discharge cycles. Specifically, in one embodiment, the calculation module determines the remaining usable cycles of the hydrogen storage cylinder by comparing the current cumulative number of hydrogen charge / discharge cycles with the rated number of hydrogen charge / discharge cycles, thereby obtaining the remaining lifespan of the hydrogen cylinder.

[0076] Furthermore, in some embodiments, the remaining lifetime can be expressed as the difference between the rated number of hydrogen charge / discharge cycles and the current cumulative number of hydrogen charge / discharge cycles; in other embodiments, it can also be expressed as a ratio to reflect the proportion of the remaining lifetime to the total lifetime.

[0077] Based on this, the calculation module determines the health status of the hydrogen storage cylinder according to the remaining lifespan of the hydrogen cylinder and the rated number of charge-discharge cycles. Specifically, the health status can be expressed as the ratio between the remaining lifespan and the rated lifespan, used to quantify the degree of performance degradation of the hydrogen storage cylinder relative to its initial state.

[0078] By combining the number of hydrogen charging and discharging cycles with the rated lifespan in the above manner, the lifespan status of hydrogen storage cylinders can be quantitatively expressed. Compared with relying solely on experience or periodic testing, this method can more intuitively and continuously reflect the aging degree of hydrogen storage cylinders, providing a basis for maintenance decisions and replacement strategies.

[0079] In one embodiment of this application, the calculation module is used to determine the remaining amount of hydrogen in the hydrogen storage cylinder based on real-time pressure, rated pressure, real-time temperature, and rated temperature.

[0080] Specifically, the calculation module first determines a third ratio between the real-time pressure and the rated pressure, and a fourth ratio between the rated temperature and the real-time temperature. The third ratio characterizes the degree of change in current pressure relative to the rated pressure, and the fourth ratio reflects the effect of temperature changes on gas density.

[0081] Based on this, the calculation module estimates the relative content of hydrogen in the hydrogen storage cylinder based on the combination of the third and fourth ratios. In one embodiment, the approximate proportion of the remaining hydrogen can be obtained by multiplying the third and fourth ratios; in other embodiments, the ratios can be corrected by combining the gas state equation or calibration curve to improve the estimation accuracy.

[0082] Furthermore, in some embodiments, the remaining hydrogen amount can be expressed as the ratio of the current hydrogen mass to the hydrogen mass in a fully charged state, which is used to characterize the available energy level of the hydrogen storage cylinder.

[0083] By incorporating the combined effects of pressure and temperature on hydrogen density into the calculation, the accuracy of hydrogen surplus assessment can be significantly improved compared to methods that estimate hydrogen surplus solely based on pressure.

[0084] In one embodiment of this application, the computing module is further configured to send the status information to the vehicle control terminal to realize information interaction between the hydrogen storage tank and the vehicle system.

[0085] Specifically, the status information may include one or more of the following: hydrogen remaining quantity, thermal state, safety state, number of hydrogen charge / discharge cycles, remaining lifespan, and health state. The computing module can transmit the status information to the vehicle control terminal via a wired communication interface (such as a CAN bus) or wireless communication.

[0086] After receiving the status information, the vehicle control terminal can control the vehicle's operating status and the hydrogen storage system based on the status information. In some embodiments, the control method may include: Adjust vehicle power output or range strategy based on remaining hydrogen supply; limit hydrogen charging / discharging rate or adjust operating conditions based on thermal conditions; trigger alarms, cut off hydrogen supply or perform emergency shutdown based on safety conditions; prompt maintenance or replacement of hydrogen storage cylinders based on health status or remaining lifespan.

[0087] Furthermore, in some embodiments, the vehicle control terminal can also make comprehensive decisions based on the status information of multiple hydrogen storage cylinders, such as realizing hydrogen supply switching or load distribution among multiple hydrogen storage cylinders.

[0088] By employing the above methods, the coordination between the hydrogen storage tank status information and the vehicle control system is achieved, enabling the hydrogen storage system to not only possess status perception capabilities but also participate in vehicle-level control decisions, thereby improving the safety and intelligence level of vehicle operation.

[0089] The vehicle-mounted hydrogen storage cylinder provided in this application embodiment acquires multi-source data, including pressure, temperature, hydrogen flow rate during charging and discharging, and calibration parameters, by incorporating multiple sensors, receiving modules, and computing modules within the cylinder. This multi-source data is then used to fuse and calculate the cylinder's state information, enabling a multi-dimensional characterization of its operational status. Specifically, by constructing a weighted calculation relationship between pressure deviation, hydrogen flow rate, and real-time temperature, the thermal state of the cylinder is quantitatively assessed, effectively reflecting the thermal coupling characteristics during charging and discharging. Compared to existing technologies that rely on single-parameter threshold judgments, this application significantly improves the accuracy and comprehensiveness of hydrogen storage cylinder state assessment. The acquired state information not only reflects the current operating status but also provides a reliable basis for health status analysis, remaining life assessment, and predictive maintenance, thereby enhancing the operational safety of the hydrogen storage system and the scientific basis of overall control decisions.

[0090] See Figure 2 The diagram shown is a flowchart of a method for determining the state of a vehicle-mounted hydrogen storage tank, provided in an exemplary embodiment of this application. The method includes: S201. Obtain the first parameter of the vehicle hydrogen storage cylinder body under multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the cylinder body, real-time temperature inside the cylinder body, impact force of the cylinder body, and gas composition outside the cylinder body. S202, Receive second parameters for each hydrogen charging and discharging process of the bottle at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the hydrogen charging and discharging process; S203. Obtain the pre-calibrated third parameters of the cylinder; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions; S204. Based on the first parameter, the second parameter, and the third parameter, determine the state information of the vehicle-mounted hydrogen storage cylinder; the state information includes one or more of the following: remaining hydrogen quantity, thermal state, safety state, number of hydrogen charging / discharging cycles, remaining lifespan of the hydrogen cylinder, and health state; wherein, when determining the thermal state, determining the state information of the vehicle-mounted hydrogen storage cylinder specifically includes: determining a first difference between the real-time pressure and the rated pressure, and determining a first ratio between the first difference and the rated pressure; based on the first ratio and the fitting coefficients corresponding to the hydrogen flow rate, respectively, performing a weighted summation of the first ratio, the hydrogen flow rate, and the real-time temperature to obtain the thermal state.

[0091] In some embodiments, the first parameter includes the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle; Determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: The safety status is determined based on the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle.

[0092] In some embodiments, the second parameter further includes the start and end timestamps of each hydrogen charging and discharging process performed by the cylinder at the hydrogen refueling station; the third parameter further includes the pressure change threshold of the cylinder during a complete hydrogen charging and discharging process. Determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: For any of the hydrogen charging and discharging processes, based on the start timestamp and end timestamp, the starting pressure and ending pressure of each hydrogen charging and discharging process are determined from the historical information of the real-time pressure inside the bottle. Determine a second difference between the internal pressure of the ending bottle and the internal pressure of the starting bottle, and a second ratio between the second difference and the pressure change threshold; Based on the second ratio and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charge-discharge cycles corresponding to the hydrogen charge-discharge process is determined; The number of hydrogen charge / discharge cycles is determined based on the equivalent number of hydrogen charge / discharge cycles corresponding to each of the aforementioned hydrogen charge / discharge processes.

[0093] In some implementations, determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: Based on the thermal state corresponding to the hydrogen charging and discharging process, the fitting coefficient corresponding to the thermal state, the second ratio, and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charging and discharging cycles corresponding to the hydrogen charging and discharging process is determined.

[0094] In some embodiments, the third parameter includes the rated number of hydrogen charge / discharge cycles of the bottle; Determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: The remaining life of the hydrogen cylinder is determined based on the number of hydrogen charge / discharge cycles and the rated number of hydrogen charge / discharge cycles. The health status is determined based on the remaining lifespan of the hydrogen cylinder and the rated number of hydrogen charge / discharge cycles.

[0095] In some implementations, determining the status information of the vehicle-mounted hydrogen storage cylinder specifically includes: The remaining amount of hydrogen is determined based on a third ratio of the real-time pressure to the rated pressure, and a fourth ratio of the rated temperature to the real-time temperature.

[0096] In some embodiments, the method further includes: The status information is sent to the vehicle control terminal; the vehicle control terminal is used to control the vehicle and / or the vehicle hydrogen storage cylinder based on the status information.

[0097] For details on the implementation process of each step in the above method, please refer to the implementation process of the corresponding device in the above-mentioned vehicle hydrogen storage cylinder, which will not be repeated here.

[0098] This application also provides a computer device, such as... Figure 3 The diagram shown is a schematic representation of a computer device according to an exemplary embodiment of this application. The computer device includes: Processor 31 and memory 32; the memory 32 stores machine-readable instructions executable by the processor 31, and the processor 31 executes the machine-readable instructions stored in the memory 32. When the machine-readable instructions are executed by the processor 31, the processor 31 performs the following steps: The first parameter of the vehicle hydrogen storage tank body is obtained under multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the tank body, real-time temperature inside the tank body, impact force of the tank body, and gas composition outside the tank body. Receive second parameters from the various hydrogen charging and discharging processes performed on the cylinder at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the charging and discharging processes; Obtain the pre-calibrated third parameters of the cylinder; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions; Based on the first parameter, the second parameter, and the third parameter, the status information of the vehicle hydrogen storage cylinder is determined; the status information includes one or more of the following: hydrogen remaining quantity, thermal state, safety state, number of hydrogen filling and discharging cycles, remaining lifespan of the hydrogen cylinder, and health state. Specifically, determining the state information of the vehicle-mounted hydrogen storage cylinder when determining the thermal state includes: Determine a first difference between the real-time pressure and the rated pressure, and determine a first ratio between the first difference and the rated pressure; Based on the fitting coefficients corresponding to the first ratio and the hydrogen flow rate, the first ratio, the hydrogen flow rate, and the real-time temperature are weighted and summed to obtain the thermal state.

[0099] The aforementioned memory 32 includes a main memory 321 and an external memory 322; the main memory 321, also known as internal memory, is used to temporarily store the computational data in the processor 31, as well as the data exchanged with external memory 322 such as a hard disk. The processor 31 exchanges data with the external memory 322 through the main memory 321.

[0100] The specific execution process of the above instructions can be referred to the steps of the method for determining the state of a vehicle hydrogen storage cylinder described in the embodiments of this application, and will not be repeated here.

[0101] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this application according to actual needs. Those skilled in the art can understand and implement this without any inventive effort.

[0102] This application also provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program performs the steps of the method for determining the state of a vehicle-mounted hydrogen storage tank as described in the above-described method embodiments. The storage medium can be either volatile or non-volatile computer-readable storage.

[0103] This application also provides a computer program product, including a computer program / instruction, which, when executed by the computer program / instruction processor, implements the steps of the vehicle hydrogen storage tank state determination method provided in the various embodiments of this application.

[0104] The aforementioned computer program product can be implemented through hardware, software, or a combination thereof. In one optional embodiment, the computer program product is specifically embodied in a computer storage medium; in another optional embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0105] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems and devices described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division; in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection may be through some communication interfaces; the indirect coupling or communication connection of devices or units may be electrical, mechanical, or other forms.

[0106] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0107] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0108] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0109] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0110] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A vehicle-mounted hydrogen storage cylinder, characterized in that, It includes the bottle body, multiple sensors, a receiving module, a storage module, and a computing module; The various sensors are used to collect a first parameter of the bottle body in multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the bottle body, real-time temperature inside the bottle body, impact force of the bottle body, and gas composition outside the bottle body. The receiving module is used to receive second parameters during each hydrogen filling and discharging process of the bottle at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the hydrogen filling and discharging process; The storage module is used to store the pre-calibrated third parameters of the cylinder; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions; The calculation module is used to determine the status information of the vehicle-mounted hydrogen storage cylinder based on the first parameter, the second parameter, and the third parameter; the status information includes one or more of the following: remaining hydrogen quantity, thermal state, safety state, number of hydrogen filling / discharging cycles, remaining lifespan of the hydrogen cylinder, and health state; wherein, when determining the thermal state, the calculation module is specifically used for: Determine a first difference between the real-time pressure and the rated pressure, and determine a first ratio between the first difference and the rated pressure; Based on the fitting coefficients corresponding to the first ratio and the hydrogen flow rate, the first ratio, the hydrogen flow rate, and the real-time temperature are weighted and summed to obtain the thermal state.

2. The vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that, The first parameter includes the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle; The calculation module is specifically used for: The safety status is determined based on the real-time pressure inside the bottle, the impact force of the bottle, and the gas composition outside the bottle.

3. The vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that, The second parameter also includes the start and end timestamps of each hydrogen charging and discharging process performed by the cylinder at the hydrogen refueling station; the third parameter also includes the pressure change threshold of the cylinder during a complete hydrogen charging and discharging process; the calculation module is specifically used for: For any of the hydrogen charging and discharging processes, based on the start timestamp and end timestamp, the starting pressure and ending pressure of each hydrogen charging and discharging process are determined from the historical information of the real-time pressure inside the bottle. Determine a second difference between the internal pressure of the ending bottle and the internal pressure of the starting bottle, and a second ratio between the second difference and the pressure change threshold; Based on the second ratio and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charge-discharge cycles corresponding to the hydrogen charge-discharge process is determined; The number of hydrogen charge / discharge cycles is determined based on the equivalent number of hydrogen charge / discharge cycles corresponding to each of the aforementioned hydrogen charge / discharge processes.

4. The vehicle-mounted hydrogen storage cylinder according to claim 3, characterized in that, The calculation module is specifically used for: Based on the thermal state corresponding to the hydrogen charging and discharging process, the fitting coefficient corresponding to the thermal state, the second ratio, and the fitting coefficient corresponding to the second ratio, the equivalent number of hydrogen charging and discharging cycles corresponding to the hydrogen charging and discharging process is determined.

5. The vehicle-mounted hydrogen storage cylinder according to claim 3, characterized in that, The third parameter includes the rated number of hydrogen charge / discharge cycles for the bottle; the calculation module is specifically used for: The remaining life of the hydrogen cylinder is determined based on the number of hydrogen charge / discharge cycles and the rated number of hydrogen charge / discharge cycles. The health status is determined based on the remaining lifespan of the hydrogen cylinder and the rated number of hydrogen charge / discharge cycles.

6. The vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that, The calculation module is specifically used for: The remaining amount of hydrogen is determined based on a third ratio of the real-time pressure to the rated pressure, and a fourth ratio of the rated temperature to the real-time temperature.

7. The vehicle-mounted hydrogen storage cylinder according to claim 1, characterized in that, The computing module is also used for: The status information is sent to the vehicle control terminal; the vehicle control terminal is used to control the vehicle and / or the vehicle hydrogen storage cylinder based on the status information.

8. A method for determining the state of a vehicle-mounted hydrogen storage cylinder, characterized in that, The method includes: The first parameter of the vehicle hydrogen storage tank body is obtained under multiple data dimensions; the first parameter includes one or more of the following: real-time pressure inside the tank body, real-time temperature inside the tank body, impact force of the tank body, and gas composition outside the tank body. Receive second parameters from the various hydrogen charging and discharging processes performed on the cylinder at the hydrogen refueling station; the second parameters include the hydrogen flow rate during the charging and discharging processes; Obtain the pre-calibrated third parameters of the cylinder; the third parameters include the rated pressure and rated temperature inside the vehicle hydrogen storage cylinder under rated operating conditions; Based on the first parameter, the second parameter, and the third parameter, the status information of the vehicle hydrogen storage cylinder is determined; the status information includes one or more of the following: remaining hydrogen quantity, thermal state, safety state, number of hydrogen filling and discharging cycles, remaining lifespan of the hydrogen cylinder, and health state. Specifically, determining the state information of the vehicle-mounted hydrogen storage cylinder when determining the thermal state includes: Determine a first difference between the real-time pressure and the rated pressure, and determine a first ratio between the first difference and the rated pressure; Based on the fitting coefficients corresponding to the first ratio and the hydrogen flow rate, the first ratio, the hydrogen flow rate, and the real-time temperature are weighted and summed to obtain the thermal state.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method as described in claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in claim 8.

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