Altitude calibration method, system, terminal and medium

Abstract

Embodiments of the present application disclose an altitude calibration method, system, terminal and medium. The altitude calibration method comprises: acquiring parameter information of an air filter outlet; calculating an atmospheric pressure value of an air filter inlet according to the parameter information; and calculating an altitude value according to the atmospheric pressure value. The technical scheme provided by the embodiments of the present application makes it possible to determine the altitude value only by the parameter information at the air filter outlet, so that a vehicle or the like does not need to additionally set a pressure sensor to monitor the altitude value, thereby saving the assembly cost of the vehicle or the like and improving the reliability of the vehicle or the like.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of sensor technology, and in particular to an altitude calibration method, system, terminal and medium. Background Technology

[0002] With the development of fuel cell systems, the application requirements for fuel cell systems are increasing. Different altitudes have different effects on the output power of fuel cell systems, making it necessary to confirm the altitude of the fuel cell system during operation. Current methods for altitude detection in fuel cell stacks using pressure sensors suffer from high costs. Summary of the Invention

[0003] This invention provides a high-altitude calibration method, system, terminal, and medium to address the problem that existing altitude detection methods are costly.

[0004] To address the aforementioned technical problems, the present invention adopts the following technical solution:

[0005] In a first aspect, embodiments of the present invention provide an altitude calibration method, wherein the altitude calibration method is applied to a fuel cell system, the fuel cell system including an air filter;

[0006] The method includes:

[0007] Obtain parameter information from the air filter outlet;

[0008] Calculate the atmospheric pressure value at the air filter inlet based on the parameter information;

[0009] Calculate the altitude value based on the atmospheric pressure value.

[0010] Optionally, the process of obtaining the parameter information output by the air filter includes:

[0011] Obtain the flow rate, pressure, and temperature data at the outlet of the air filter.

[0012] Optionally, calculating the atmospheric pressure value at the air filter inlet based on the parameter information includes:

[0013] Based on the flow information and the flow-pressure drop calibration curve of the air filter under standard conditions, the pressure difference between the outlet and inlet of the air filter is determined.

[0014] The atmospheric pressure at the air filter inlet is calculated based on the pressure information at the air filter outlet and the pressure difference.

[0015] Optionally, calculating the atmospheric pressure value at the air filter inlet based on the pressure information at the air filter outlet and the pressure difference includes:

[0016] Based on the flow rate information, pressure information, and temperature data, construct an objective function;

[0017] Based on the objective function, the pressure difference between the air filter outlet and the air filter inlet is calculated according to the flow-pressure drop calibration curve;

[0018] The atmospheric pressure value at the air filter inlet is determined by summing the pressure difference with the pressure information at the air filter outlet.

[0019] Optionally, calculating the altitude value based on the atmospheric pressure value includes:

[0020] The altitude value is determined based on the atmospheric pressure value at the air filter inlet and the flow rate piezoresistive calibration of the air filter.

[0021] Secondly, embodiments of the present invention provide an altitude calibration system, comprising:

[0022] Sensors are used to acquire parameter information from the air filter outlet;

[0023] A fuel cell controller is used to calculate the atmospheric pressure value at the air filter inlet based on the parameter information.

[0024] The fuel cell controller is also used to calculate the altitude value based on the atmospheric pressure value.

[0025] Optionally, the sensor is specifically used to acquire flow rate information, pressure information, and temperature data at the outlet of the air filter;

[0026] The fuel cell controller is further configured to determine the pressure difference between the outlet and inlet of the air filter based on the flow information and the flow-pressure drop calibration curve of the air filter under standard conditions; and to calculate the atmospheric pressure value at the inlet of the air filter based on the pressure information at the outlet of the air filter and the pressure difference.

[0027] Optionally, the fuel cell controller is specifically configured to construct an objective function based on the flow rate information, pressure information, and temperature data; calculate the pressure difference between the air filter outlet and the air filter inlet based on the objective function and the flow rate-pressure drop calibration curve; and sum the pressure difference with the pressure information at the air filter outlet to determine the atmospheric pressure value at the air filter inlet.

[0028] Thirdly, embodiments of the present invention provide a terminal, including: a fuel cell system and an altitude calibration system as proposed in the second aspect.

[0029] Fourthly, embodiments of the present invention provide a readable storage medium, comprising: when instructions in the readable storage medium are executed by a processor of an altitude calibration system, enabling the altitude calibration system to execute any altitude calibration method proposed in the first aspect.

[0030] The altitude calibration method provided in this invention obtains parameter information from the air filter outlet, calculates the atmospheric pressure value at the air filter inlet based on the parameter information, and then calculates the altitude value based on the atmospheric pressure value. This allows the altitude value to be determined solely from the parameter information at the air filter outlet, eliminating the need for additional pressure sensors in vehicles and other terminals to monitor altitude, thus saving assembly costs and improving the reliability of these terminals. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a fuel cell system provided in an embodiment of the present invention;

[0033] Figure 2 This is a flowchart of an altitude calibration method provided in an embodiment of the present invention;

[0034] Figure 3 This is a flowchart of another altitude calibration method provided in an embodiment of the present invention;

[0035] Figure 4 This is a flowchart of another altitude calibration method provided in the embodiments of the present invention;

[0036] Figure 5 This is a flowchart of another altitude calibration method provided in the embodiments of the present invention;

[0037] Figure 6 This is a flowchart of another altitude calibration method provided in the embodiments of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of a terminal provided in an embodiment of the present invention;

[0039] Figure 8This is a schematic diagram of another terminal provided in an embodiment of the present invention. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0041] Based on the above-mentioned technical problems, this embodiment proposes the following solutions:

[0042] Figure 1 This is a schematic diagram of a fuel cell system provided in an embodiment of the present invention. See also... Figure 1 The fuel cell system can include a hydrogen fuel cell system, which comprises a hydrogen subsystem 1, an air subsystem 2, and a fuel cell stack 3. The hydrogen subsystem 1 is responsible for the storage and supply of hydrogen energy to the vehicle. Hydrogen is typically compressed into liquid hydrogen and stored in a hydrogen storage tank. During operation, the hydrogen subsystem 1 is connected to the fuel cell stack 3, and it needs to supply the appropriate amount of hydrogen to the stack. A high-pressure sensor is installed on the hydrogen supply pipeline to detect the pressure. The hydrogen, after passing through the high-pressure pipeline, finally reaches the hydrogen injection valve. Under the control of the fuel cell controller 4, the hydrogen valve, through the opening of the solenoid valve behind it, injects the required amount of hydrogen into the anode of the fuel cell stack 3.

[0043] Air subsystem 2 is used to provide oxygen for the reaction with hydrogen, and the main source of oxygen is the atmosphere. However, atmospheric pressure is too low, so an electromechanical booster is added to the oxygen supply system to provide sufficient oxygen to the fuel cell stack 3. The electromechanical booster ensures that the air supply system draws in sufficient and pure air to ensure the catalytic efficiency of the large amount of catalyst in the fuel cell stack 3.

[0044] The air subsystem 2 includes an air filter 21. Atmospheric air is input through the inlet of the air filter 21. After filtration and compression, the air output from the outlet of the air filter 21 is high-density and high-temperature, and cannot be directly introduced into the fuel cell stack. A sensor 22 is installed at the outlet of the air filter 21 to detect parameters such as flow rate, pressure, and temperature of the air output from the outlet of the air filter 21. The output of the air filter 21 is connected to the inlet of the air compressor 23, and the outlet of the air compressor 23 is connected to the fuel cell stack 3. Under the control of the fuel cell controller 4, a solenoid valve injects an appropriate amount of filtered, pressurized, and cooled air into the cathode of the fuel cell stack 3.

[0045] Stack 3 is where hydrogen and oxygen undergo a chemical reaction: 2H2 + O2 = 2H2O. Its basic principle is the reverse reaction of water electrolysis. The anode is hydrogen and the cathode is oxygen. Under the action of the catalyst in stack 3, hydrogen diffuses outward through the anode and reacts with the electrolyte, releasing electrons that reach the cathode through the external load.

[0046] In a hydrogen fuel cell system, oxygen is fed to the cathode and hydrogen to the anode. The hydrogen and oxygen react under the catalysis of the catalyst in the stack 3 to generate electricity. The higher the altitude, the more severe the drop in the outlet pressure of the air compressor 23, which affects the catalytic reaction of hydrogen and oxygen in the stack 3, reducing the generated electricity and affecting the output power of the hydrogen fuel cell system.

[0047] At high altitudes, the outlet pressure of the air compressor 23 at the same operating point will decrease, resulting in a decrease in the pressure entering the fuel cell stack 3. To ensure stable output of the fuel cell system, confirming the altitude is particularly important for the strategic control of the fuel cell system.

[0048] Atmospheric pressure varies at different altitudes. While the compression performance of air compressor 23 remains constant, the outlet pressure of the air compressor will change. Determining the atmospheric pressure at the current altitude is an important requirement in the control strategy of the fuel cell system during operation.

[0049] Figure 2 This is a flowchart of an altitude calibration method provided in an embodiment of the present invention. See also... Figure 2 The altitude calibration method provided in this embodiment of the invention is applied to a fuel cell system, which includes an air filter; the altitude calibration method provided in this embodiment of the invention includes:

[0050] S101. Obtain parameter information of the air filter outlet.

[0051] Specifically, the sensor can be installed at the air filter outlet, and the sensor can detect the air filter's parameter information.

[0052] S102. Calculate the atmospheric pressure value at the air filter inlet based on the parameter information.

[0053] Specifically, the parameter information can include pressure information and flow information. Based on the parameter information at the air filter outlet, the atmospheric pressure value at the air filter inlet is calculated.

[0054] S103. Calculate the altitude value based on the atmospheric pressure value.

[0055] Specifically, based on the atmospheric pressure value and the preset correspondence between atmospheric pressure and altitude, the altitude value under the current atmospheric pressure is determined.

[0056] The altitude calibration method provided in this invention obtains parameter information from the air filter outlet, calculates the atmospheric pressure value at the air filter inlet based on the parameter information, and then calculates the altitude value based on the atmospheric pressure value. This allows the altitude value to be determined solely from the parameter information at the air filter outlet, eliminating the need for additional pressure sensors in vehicles and other terminals to monitor altitude, thus saving assembly costs and improving the reliability of these terminals.

[0057] Optional, Figure 3 This is a flowchart of another altitude calibration method provided in an embodiment of the present invention. Based on the above embodiments, see [link to related documentation]. Figure 3 The altitude calibration method provided in this embodiment of the invention includes:

[0058] S201. Obtain the flow rate information, pressure information, and temperature data of the air filter outlet.

[0059] Specifically, a sensor is installed at the air filter outlet, which can detect the flow rate, pressure, and temperature data at the air filter outlet.

[0060] S102. Calculate the atmospheric pressure value at the air filter inlet based on the parameter information.

[0061] S103. Calculate the altitude value based on the atmospheric pressure value.

[0062] Optional, Figure 4 This is a flowchart of another altitude calibration method provided in an embodiment of the present invention. Based on the above embodiments, see [link to related documentation]. Figure 4 The altitude calibration method provided in this embodiment of the invention includes:

[0063] S201. Obtain the flow rate information, pressure information, and temperature data of the air filter outlet.

[0064] S301. Based on the flow information and the flow-pressure drop calibration curve of the air filter under standard conditions, determine the pressure difference between the outlet and inlet of the air filter.

[0065] S302. Calculate the atmospheric pressure value at the air filter inlet based on the pressure information at the air filter outlet and the pressure difference.

[0066] S103. Calculate the altitude value based on the atmospheric pressure value.

[0067] Optional, Figure 5 This is a flowchart of another altitude calibration method provided in an embodiment of the present invention. Based on the above embodiments, see [link to related documentation]. Figure 5The altitude calibration method provided in this embodiment of the invention includes:

[0068] S201. Obtain the flow rate information, pressure information, and temperature data of the air filter outlet.

[0069] S301. Based on the flow information and the flow-pressure drop calibration curve of the air filter under standard conditions, determine the pressure difference between the outlet and inlet of the air filter.

[0070] S401. Construct an objective function based on the flow rate information, pressure information, and temperature data.

[0071] Specifically, the objective function M cro =f(m inlet P inlet T inlet ), where m inlet P represents the flow rate information at the air filter outlet. inlet This indicates the pressure information at the air filter outlet, T. inlet This indicates the temperature data at the outlet of the air filter.

[0072] S402. Based on the objective function, calculate the pressure difference between the air filter outlet and the air filter inlet according to the flow-pressure drop calibration curve.

[0073] Specifically, based on the flow-pressure drop calibration curve, and according to the flow information in the objective function, the pressure difference ΔP = f(M cro ).

[0074] S403. Sum the pressure difference with the pressure information at the air filter outlet to determine the atmospheric pressure value at the air filter inlet.

[0075] Specifically, the pressure difference ΔP is compared with the pressure information P at the air filter outlet. inlet Summing, determine the atmospheric pressure value at the air filter inlet: P = ΔP + P inlet .

[0076] S103. Calculate the altitude value based on the atmospheric pressure value.

[0077] Optional, Figure 6 This is a flowchart of another altitude calibration method provided in an embodiment of the present invention. Based on the above embodiments, see [link to related documentation]. Figure 6 The altitude calibration method provided in this embodiment of the invention includes:

[0078] S101. Obtain parameter information of the air filter outlet.

[0079] S102. Calculate the atmospheric pressure value at the air filter inlet based on the parameter information.

[0080] S501. Determine the altitude value based on the atmospheric pressure value at the air filter inlet and the flow rate piezoresistive calibration of the air filter.

[0081] Specifically, the altitude is determined based on the atmospheric pressure value at the air filter inlet and the pressure-altitude correspondence H = f(P).

[0082] This invention provides an altitude calibration system. Based on the above embodiments, see also... Figure 1 The altitude calibration system provided in this embodiment of the invention includes:

[0083] Sensor 22 is used to acquire parameter information of the air filter outlet;

[0084] The fuel cell controller 4 is used to calculate the atmospheric pressure value at the air filter inlet based on the parameter information.

[0085] The fuel cell controller 4 is also used to calculate the altitude value based on the atmospheric pressure value.

[0086] Optionally, based on the above embodiments, see also... Figure 1 Sensor 22 is specifically used to acquire flow rate information, pressure information and temperature data at the outlet of the air filter;

[0087] The fuel cell controller 4 is also configured to determine the pressure difference between the air filter outlet and the air filter inlet based on the flow information and the flow-pressure drop calibration curve of the air filter under standard conditions; and to calculate the atmospheric pressure value at the air filter inlet based on the pressure information at the air filter outlet and the pressure difference.

[0088] Optionally, based on the above embodiments, see also... Figure 1 The fuel cell controller 4 is specifically used to construct an objective function based on the flow information, pressure information, and temperature data; based on the objective function, calculate the pressure difference between the air filter outlet and the air filter inlet according to the flow-pressure drop calibration curve; and sum the pressure difference with the pressure information at the air filter outlet to determine the atmospheric pressure value at the air filter inlet.

[0089] Figure 7 This is a schematic diagram of a terminal provided in an embodiment of the present invention. Based on the above embodiment, see... Figure 7The terminal 80 provided in this embodiment of the invention includes a fuel cell system 81 and an altitude calibration system 82 as proposed in any of the above embodiments. The beneficial effects of the altitude calibration system 82 proposed in any of the above embodiments will not be elaborated further here. The terminal 81 provided in this embodiment of the invention can be a vehicle or a drone, etc.

[0090] Figure 8 This is a schematic diagram of another terminal provided in an embodiment of the present invention. Based on the above embodiments, see... Figure 8 This invention provides a readable storage medium 91 storing a software program. When the instructions in the readable storage medium 91 are executed by the processor 92 of the altitude calibration system, the altitude calibration system of the terminal 80 can execute the altitude calibration method proposed in any of the above embodiments. The method includes: acquiring parameter information of the air filter outlet; calculating the atmospheric pressure value of the air filter inlet based on the parameter information; and calculating the altitude value based on the atmospheric pressure value.

[0091] Of course, the readable storage medium containing computer-executable instructions provided in the embodiments of the present invention is not limited to the altitude calibration method operations provided above, but can also perform related operations in the altitude calibration method provided in any embodiment of the present invention, and has corresponding functions and beneficial effects.

[0092] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This software product can be stored in a readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the altitude calibration method described in the various embodiments of the present invention.

[0093] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An altitude calibration method, characterized by, The altitude calibration method is applied to a fuel cell system, and the fuel cell system comprises an air filter; The method comprises: obtaining parameter information of an air filter outlet; According to the parameter information, the atmospheric pressure value of the air filter inlet is calculated; According to the atmospheric pressure value, the altitude value is calculated; In the obtaining parameter information of the air filter output, it comprises: Obtaining flow information, pressure information and temperature data of the air filter outlet; According to the parameter information, the atmospheric pressure value of the air filter inlet is calculated; According to the flow information, and based on the flow-pressure drop calibration curve of the air filter under standard conditions, the pressure difference value between the outlet of the air filter and the inlet of the air filter is determined; According to the pressure information of the air filter outlet and the pressure difference value, the atmospheric pressure value of the air filter inlet is calculated; According to the flow information, pressure information and temperature data, the objective function is constructed; Based on the objective function, the pressure difference value between the outlet of the air filter and the inlet of the air filter is calculated according to the flow-pressure drop calibration curve; The pressure difference value and the pressure information of the air filter outlet are summed up to determine the atmospheric pressure value of the air filter inlet; According to the atmospheric pressure value of the air filter inlet, the altitude value is determined based on the flow-pressure drop calibration of the air filter. The objective function is wherein represents flow information of the outlet of the air filter, represents pressure information of the outlet of the air filter, represents temperature data of the outlet of the air filter.

2. The altitude calibration method according to claim 1, wherein, Including: a sensor for obtaining parameter information of an air filter outlet; 3. An elevation calibration system, characterized by, The fuel cell controller is used for calculating the atmospheric pressure value of the air filter inlet according to the parameter information; The fuel cell controller is also used for calculating the altitude value according to the atmospheric pressure value; The sensor is specifically used for obtaining flow information, pressure information and temperature data of the air filter outlet; The fuel cell controller is also used for determining the pressure difference value between the outlet of the air filter and the inlet of the air filter according to the flow information, and based on the flow-pressure drop calibration curve of the air filter under standard conditions; And according to the pressure information of the air filter outlet and the pressure difference value, the atmospheric pressure value of the air filter inlet is calculated; The fuel cell controller is specifically used for constructing an objective function according to the flow information, pressure information and temperature data; Based on the objective function, the pressure difference value between the outlet of the air filter and the inlet of the air filter is calculated according to the flow-pressure drop calibration curve; And the pressure difference value and the pressure information of the air filter outlet are summed up to determine the atmospheric pressure value of the air filter inlet; Including: A fuel cell system and the altitude calibration system of claim 3. The objective function is wherein denotes flow information of the outlet of the air filter, denotes pressure information of the outlet of the air filter, denotes temperature data of the outlet of the air filter.

4. A terminal, characterized by comprising: Including: When the instructions in the readable storage medium are executed by the processor of the altitude calibration system, the altitude calibration system can execute the altitude calibration method of any one of claims 1 to 2.

5. A readable storage medium characterized by, ​ ​

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