Fuel tank performance detection method, system, terminal device and storage medium

Abstract

The present invention provides a method, system, terminal device and storage medium for testing the performance of a fuel tank, the method comprising: adjusting the fuel tank to be tested to a full oil level condition, and collecting the liquid level difference of the fuel tank valve body in the fuel tank to be tested under the full oil level condition; determining the hydraulic pressure value of the fuel tank valve body according to the liquid level difference; performing an oil pumping operation on the fuel tank to be tested according to a preset oil pumping rate, and collecting the fuel tank pressure of the fuel tank to be tested in real time to obtain fuel tank pressure information; drawing a pressure change image according to the fuel tank pressure information, determining the valve body air supply node according to the pressure change image, and generating the performance test result of the fuel tank to be tested according to the valve body air supply node. The present invention uses an automated detection method to perform ventilation performance detection on the fuel tank to be tested, thereby improving the detection efficiency and accuracy of fuel tank performance.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel tank detection, and in particular to a fuel tank performance detection method, system, terminal equipment and storage medium. Background Art

[0002] During the driving or parking process of the car, as well as under harsh working conditions such as thermal expansion of the fuel and tilting of the car, the fuel tank of the car needs to be ventilated to balance the internal and external pressures of the tank. The fuel tank valve body includes a float in the valve body, and an exhaust hole is set on the top of the valve body. A sealing gasket is set on the matching surface of the float and the exhaust hole. As the fuel level rises, the float rises and pushes the sealing gasket to close the exhaust hole. As the fuel level drops, the sealing gasket follows the float to drop and separates from the exhaust hole to achieve ventilation. During the use of the car fuel tank, if the fuel tank valve body is not vented in time, excessive positive pressure or excessive negative pressure will be generated inside the tank, causing the tank to "expand" or "deflate". Therefore, the performance testing of the car fuel tank is increasingly valued by car manufacturers.

[0003] In the existing fuel tank performance testing process, the fuel tank performance is generally tested manually, resulting in low accuracy of the fuel tank performance testing. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a fuel tank performance detection method, system, terminal device and storage medium to solve the problem of low performance detection accuracy in the existing fuel tank performance detection process.

[0005] A first aspect of an embodiment of the present invention provides a fuel tank performance detection method, comprising:

[0006] The oil tank to be tested is adjusted to a full oil level condition, and a liquid level difference of the oil tank valve body in the oil tank to be tested is collected under the full oil level condition, wherein the liquid level difference is used to characterize a height difference between the oil tank valve body and the oil level in the oil tank to be tested;

[0007] determining a hydraulic pressure value of the oil tank valve body according to the liquid level difference;

[0008] Pumping oil from the oil tank to be tested according to a preset pumping rate, and collecting the oil tank pressure of the oil tank to be tested in real time to obtain oil tank pressure information;

[0009] A pressure change image is drawn according to the oil tank pressure information, a valve body air supply node is determined according to the pressure change image, and a performance test result of the oil tank to be tested is generated according to the valve body air supply node.

[0010] Further, determining the valve body air supply node according to the pressure change image includes:

[0011] Respectively acquiring pressure differences between adjacent pressure nodes in the pressure change image, and determining pressure change trends between corresponding adjacent pressure nodes according to the pressure differences;

[0012] If the pressure variation trend between any of the pressure nodes and the adjacent pressure nodes is different, the pressure node is determined as the valve body air supply node.

[0013] Furthermore, after determining the pressure node as the valve body air supply node, the method further includes:

[0014] If a plurality of the valve body air supply nodes are determined in the pressure change image, the air supply time point of each valve body air supply node is obtained respectively;

[0015] The valve body air supply node is screened according to the air supply time point.

[0016] Furthermore, the hydraulic pressure value of the oil tank valve body is determined according to the liquid level difference, and the formula used is:

[0017] P v =8.2hkpa

[0018] Where, h is the liquid level difference, P v is the hydraulic pressure value.

[0019] Furthermore, before the oil pumping operation is performed on the oil tank to be tested according to the preset oil pumping rate, the method further includes:

[0020] Determining the vapor space area in the oil tank to be tested under a full oil level condition according to the oil level in the oil tank to be tested;

[0021] A pressure sensor is arranged in the steam space area, and the pressure sensor is used to collect the tank pressure of the oil tank to be tested.

[0022] A second aspect of an embodiment of the present invention provides a fuel tank performance detection system, comprising:

[0023] A liquid level difference acquisition module is used to adjust the oil tank to be tested to a full oil level condition, and to acquire a liquid level difference of the oil tank valve body in the oil tank to be tested under the full oil level condition, wherein the liquid level difference is used to characterize a height difference between the oil tank valve body and the oil level in the oil tank to be tested;

[0024] A hydraulic pressure determination module, used to determine the hydraulic pressure value of the oil tank valve body according to the liquid level difference;

[0025] The oil tank pressure acquisition module is used to perform an oil pumping operation on the oil tank to be tested according to a preset oil pumping rate, and to collect the oil tank pressure of the oil tank to be tested in real time to obtain the oil tank pressure information;

[0026] The detection result generating module is used to draw a pressure change image according to the oil tank pressure information, determine the valve body air supply node according to the pressure change image, and generate the performance detection result of the oil tank to be tested according to the valve body air supply node.

[0027] Furthermore, the detection result generating module is also used for:

[0028] Respectively acquiring pressure differences between adjacent pressure nodes in the pressure change image, and determining pressure change trends between corresponding adjacent pressure nodes according to the pressure differences;

[0029] If the pressure variation trend between any of the pressure nodes and the adjacent pressure nodes is different, the pressure node is determined as the valve body air supply node.

[0030] Furthermore, the detection result generating module is also used for:

[0031] If a plurality of the valve body air supply nodes are determined in the pressure change image, the air supply time point of each valve body air supply node is obtained respectively;

[0032] The valve body air supply node is screened according to the air supply time point.

[0033] A third aspect of an embodiment of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the terminal device, wherein the processor implements each step of the fuel tank performance detection method provided by the first solution when executing the computer program.

[0034] A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the fuel tank performance detection method provided by the first solution are implemented.

[0035] A fuel tank performance detection method, system, terminal device and storage medium provided by the embodiments of the present invention have the following beneficial effects: by adjusting the fuel tank to be tested to a full oil level condition, the accuracy of the liquid level difference collection of the fuel tank valve body is improved; based on the liquid level difference, the hydraulic pressure value of the fuel tank valve body under the full oil level condition can be effectively determined; by real-time collection of the fuel tank pressure of the fuel tank to be tested, the fuel tank pressure information of the fuel tank to be tested during the oil pumping process can be effectively obtained; based on the fuel tank pressure information, a pressure change image can be effectively drawn; based on the pressure change image, the valve body air supply node can be automatically determined; based on the valve body air supply node, a performance detection result characterizing the ventilation performance of the fuel tank to be tested can be automatically generated; the embodiments of the present invention do not require manual fuel tank performance detection, but use an automated detection method to perform ventilation performance detection on the fuel tank to be tested, thereby improving the detection efficiency and accuracy of the fuel tank performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0037] Figure 1 is a flow chart of an implementation method of a fuel tank performance detection method provided by an embodiment of the present invention;

[0038] Figure 2 is a schematic diagram of a fuel tank to be tested under a full fuel level condition provided by an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of a fuel tank valve body sealing ring provided by an embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of an oil tank to be tested performing an oil pumping operation provided by an embodiment of the present invention;

[0041] Figure 5 is a flow chart of an implementation method of a fuel tank performance detection method provided by another embodiment of the present invention;

[0042] Figure 6 is a structural block diagram of a fuel tank performance detection system provided by an embodiment of the present invention;

[0043] Figure 7 It is a structural block diagram of a terminal device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0045] See also Figure 1 , Figure 1 The flowchart of a fuel tank performance detection method provided by an embodiment of the present invention is shown, including:

[0046] Step S10, adjusting the oil tank to be tested to a full oil level condition, and collecting the liquid level difference of the oil tank valve body in the oil tank to be tested under the full oil level condition;

[0047] The liquid level difference is used to characterize the height difference between the oil tank valve body and the oil level in the oil tank to be tested. In this step, the oil tank to be tested is adjusted to an extreme tilt condition (full oil level condition). At this time, the oil tank to be tested and the vehicle are tilted forward by 16.7°.

[0048] Specifically, see Figure 2 In the figure, 2 is the oil tank to be tested, 3 is the oil tank valve body, the oil tank valve body 3 is completely submerged in oil and cannot be directly ventilated. By collecting the liquid level difference of the oil tank valve body in the oil tank to be tested under the full oil level condition, the accuracy of the liquid level difference collection of the oil tank valve body is improved;

[0049] Step S20, determining the hydraulic pressure value of the oil tank valve body according to the liquid level difference;

[0050] Optionally, in this step, the hydraulic pressure value of the oil tank valve body is determined according to the liquid level difference, and the formula used is:

[0051] P v =8.2hkpa

[0052] Where h is the liquid level difference, P v is the hydraulic pressure value.

[0053] Specifically, see Figure 3 In the figure, 3-1 is the exhaust hole surface of the tank valve flange, 3-2 is the sealing ring of the tank valve, and the atmospheric pressure on the tank valve body is P Δ (atmospheric pressure - negative pressure in the tank) will increase as the pressure in the tank decreases. Δ ≥P v When the oil tank valve is opened, the atmospheric pressure will push it open and fill the oil tank to be tested with air, thus preventing the pressure in the oil tank from further decreasing.

[0054] Step S30, performing an oil pumping operation on the oil tank to be tested according to a preset oil pumping rate, and collecting the oil tank pressure of the oil tank to be tested in real time to obtain oil tank pressure information;

[0055] The preset oil pumping rate can be set according to the demand. Optionally, the preset oil pumping rate can also be set to the maximum fuel consumption of the vehicle corresponding to the fuel tank to be tested;

[0056] Specifically, see Figure 4, 1 is the oil pump, 2 is the oil tank to be tested, 3 is the oil tank valve body, 4 is the refueling pipe, 5 is the refueling cap, 6 is the angle device, 7 is the flow meter connected to the oil tank valve body, 8 is the oil pump externally connected to the oil pump pumping device, and 9 is the oil tank pressure sensor. In this step, the oil tank to be tested 2, the refueling pipe 4, and the refueling cap 5 are connected according to the vehicle connection method, so that the assembly of the oil tank to be tested is placed horizontally on the bench 6, the oil pump outlet is connected to the oil pumping device 8, and the gas outlet of the oil tank valve body is connected to the flow meter to detect the gas flow in real time. After the device is completed, a refueling experiment is carried out to fill the oil tank to the rated volume of the oil tank to be tested, and then the oil tank to be tested and the refueling pipe are tilted forward by 16.7°, and the oil pumping device is used to pump out the fuel. The oil pumping rate is the maximum fuel consumption of the whole vehicle, which lasts for 1 hour. The value of the oil tank pressure sensor during the oil pumping process is recorded to obtain the oil tank pressure information;

[0057] Optionally, in this step, before the oil pumping operation is performed on the oil tank to be tested according to the preset oil pumping rate, the step further includes:

[0058] Determine the vapor space area in the oil tank to be tested under a full oil level condition according to the oil level in the oil tank to be tested, and arrange the pressure sensor in the vapor space area;

[0059] Among them, the pressure sensor is used to collect the tank pressure of the oil tank to be tested. In this step, the pressure sensor is the tank pressure sensor 9. By determining the steam space area in the oil tank to be tested under full oil level conditions, the accuracy of the position setting of the tank pressure sensor 9 is improved.

[0060] Step S40, drawing a pressure change image according to the oil tank pressure information, determining a valve body air supply node according to the pressure change image, and generating a performance test result of the oil tank to be tested according to the valve body air supply node;

[0061] Among them, a pressure change image is drawn through the fuel tank pressure information. Based on the pressure change image, the changing trend of the fuel tank pressure at different time points can be effectively reflected. Based on the pressure change image, the valve body air replenishment node can be automatically determined. Based on the valve body air replenishment node, a performance test result representing the ventilation performance of the fuel tank to be tested can be automatically generated; for example, when the fuel tank valve body A is replenished at -1.3kpa and the fuel tank valve body B is replenished at -3.5kpa, it can be seen that the ventilation performance of the fuel tank valve body A is better than that of the fuel tank valve body B.

[0062] In the present embodiment, the accuracy of the liquid level difference collection of the oil tank valve body is improved by adjusting the oil tank to be tested to the full oil level condition, and the hydraulic pressure value of the oil tank valve body under the full oil level condition can be effectively determined based on the liquid level difference, and the oil tank pressure information of the oil tank to be tested during the oil pumping process can be effectively obtained by collecting the oil tank pressure of the oil tank to be tested in real time, and the pressure change image can be effectively drawn based on the oil tank pressure information, and the valve body air supply node can be automatically determined based on the pressure change image, and the performance test result characterizing the ventilation performance of the oil tank to be tested can be automatically generated based on the valve body air supply node. The embodiment of the present invention does not require manual oil tank performance testing, but adopts an automated testing method to perform ventilation performance testing on the oil tank to be tested, thereby improving the detection efficiency and accuracy of the oil tank performance.

[0063] See also Figure 5 , Figure 5 FIG. 1 is a flowchart of a fuel tank performance detection method according to another embodiment of the present invention. Figure 1 Embodiment, the fuel tank performance detection method provided in this embodiment is used for Figure 1 Step S40 in the embodiment is further refined to include:

[0064] Step S41, respectively obtaining pressure differences between adjacent pressure nodes in the pressure change image, and determining pressure change trends between corresponding adjacent pressure nodes according to the pressure differences;

[0065] The pressure differences between adjacent pressure nodes and between the rear node and the front node in the pressure change image are calculated respectively. If the pressure difference is greater than or equal to 0, it is determined that the pressure trend from the rear node to the front node is an upward trend. If the pressure difference is less than 0, it is determined that the pressure trend from the rear node to the front node is a downward trend.

[0066] Step S42, if the pressure change trend between any of the pressure nodes and the adjacent pressure nodes is different, then the pressure node is determined as the valve body air supply node;

[0067] Among them, it can be known from the experiment that during the oil pumping process of the oil tank to be tested, the oil tank pressure will first drop, and after reaching a certain value, the oil tank pressure will rise, that is, when the pressure change trend between the pressure node and the adjacent pressure nodes is different, then the pressure node is the starting value achieved by the oil tank valve body air replenishment process, and the pressure node is determined as the valve body air replenishment node.

[0068] Optionally, after determining the pressure node as the valve body air supply node in this step, the step further includes:

[0069] If a plurality of the valve body air supply nodes are determined in the pressure change image, the air supply time points of the valve body air supply nodes are respectively obtained, and the valve body air supply nodes are screened according to the air supply time points;

[0070] Among them, if multiple valve body air supply nodes are determined in the pressure change image, the air supply time points of each valve body air supply node are obtained respectively, and only the valve body air supply node with the smallest air supply time point is retained, and the remaining valve body air supply nodes are deleted, thereby improving the accuracy of the valve body air supply nodes.

[0071] In this embodiment, by respectively acquiring the pressure difference between adjacent pressure nodes in the pressure change image, the pressure change trend between adjacent pressure nodes can be effectively determined based on the pressure difference, and the valve body air supply node in the pressure change image can be effectively determined based on the pressure change trend, thereby improving the accuracy of fuel tank performance detection.

[0072] See also Figure 6 , Figure 6 1 is a structural block diagram of a fuel tank performance detection system 100 provided in an embodiment of the present invention. In this embodiment, the fuel tank performance detection system 100 includes various units for executing Figure 1 , Figure 5 For details, please refer to the steps in the corresponding embodiment. Figure 1 , Figure 5 as well as Figure 1 , Figure 5 For the convenience of explanation, only the parts related to this embodiment are shown. Figure 6 The fuel tank performance detection system 100 includes: a liquid level difference acquisition module 10, a hydraulic pressure determination module 11, a fuel tank pressure acquisition module 12 and a detection result generation module 13, wherein:

[0073] The liquid level difference acquisition module 10 is used to adjust the oil tank to be tested to a full oil level condition, and to collect the liquid level difference of the oil tank valve body in the oil tank to be tested under the full oil level condition, wherein the liquid level difference is used to characterize the height difference between the oil tank valve body and the oil level in the oil tank to be tested. In this module, the oil tank to be tested is adjusted to an extreme tilt condition (full oil level condition), at which time the oil tank to be tested and the vehicle are tilted forward by 16.7°.

[0074] The hydraulic pressure determination module 11 is used to determine the hydraulic pressure value of the oil tank valve body according to the liquid level difference.

[0075] Furthermore, in this embodiment, the hydraulic pressure value of the oil tank valve body is determined according to the liquid level difference, and the formula used is:

[0076] P v =8.2hkpa

[0077] Where, h is the liquid level difference, P v is the hydraulic pressure value.

[0078] The fuel tank pressure acquisition module 12 is used to pump oil from the fuel tank to be tested according to a preset pumping rate, and collect the fuel tank pressure of the fuel tank to be tested in real time to obtain fuel tank pressure information. The preset pumping rate can be set according to demand, and optionally, the preset pumping rate can also be set to the maximum fuel consumption of the vehicle corresponding to the fuel tank to be tested.

[0079] Optionally, the oil tank pressure acquisition module 12 is further used to: determine the steam space area in the oil tank to be tested under the full oil level condition according to the oil level in the oil tank to be tested;

[0080] A pressure sensor is arranged in the steam space area, and the pressure sensor is used to collect the tank pressure of the oil tank to be tested.

[0081] The test result generating module 13 is used to draw a pressure change image according to the oil tank pressure information, determine the valve body air supply node according to the pressure change image, and generate the performance test result of the oil tank to be tested according to the valve body air supply node. The pressure change image is drawn according to the oil tank pressure information, and the change trend of the oil tank pressure at different time points can be effectively reflected based on the pressure change image. The valve body air supply node can be automatically determined based on the pressure change image, and the performance test result characterizing the ventilation performance of the oil tank to be tested can be automatically generated based on the valve body air supply node.

[0082] Optionally, the detection result generating module 13 is further used to: respectively obtain the pressure difference between adjacent pressure nodes in the pressure change image, and determine the pressure change trend between the corresponding adjacent pressure nodes according to the pressure difference;

[0083] If the pressure variation trend between any of the pressure nodes and the adjacent pressure nodes is different, the pressure node is determined as the valve body air supply node.

[0084] Furthermore, the detection result generating module 13 is also used for: if a plurality of the valve body air supply nodes are determined in the pressure change image, then obtaining the air supply time point of each valve body air supply node respectively;

[0085] The valve body air supply node is screened according to the air supply time point.

[0086] In the present embodiment, the accuracy of the liquid level difference collection of the oil tank valve body is improved by adjusting the oil tank to be tested to the full oil level condition, and the hydraulic pressure value of the oil tank valve body under the full oil level condition can be effectively determined based on the liquid level difference, and the oil tank pressure information of the oil tank to be tested during the oil pumping process can be effectively obtained by collecting the oil tank pressure of the oil tank to be tested in real time, and the pressure change image can be effectively drawn based on the oil tank pressure information, and the valve body air supply node can be automatically determined based on the pressure change image, and the performance test result characterizing the ventilation performance of the oil tank to be tested can be automatically generated based on the valve body air supply node. The embodiment of the present invention does not require manual oil tank performance testing, but adopts an automated testing method to perform ventilation performance testing on the oil tank to be tested, thereby improving the detection efficiency and accuracy of the oil tank performance.

[0087] Figure 7 FIG. 2 is a block diagram of a terminal device 2 provided in another embodiment of the present invention. Figure 7 As shown, the terminal device 2 of this embodiment includes: a processor 20, a memory 21, and a computer program 22 stored in the memory 21 and executable on the processor 20, such as a program of the fuel tank performance detection method. When the processor 20 executes the computer program 22, the steps in each embodiment of the above-mentioned fuel tank performance detection method are implemented, such as Figure 1 S10 to S40 as shown, or Figure 5 Alternatively, the processor 20 implements the above when executing the computer program 22 Figure 5 The functions of each module in the corresponding embodiment are, for example, Figure 6 For details on the functions of modules 10 to 13, please refer to Figure 5 The relevant descriptions in the corresponding embodiments are not repeated here.

[0088] Exemplarily, the computer program 22 may be divided into one or more units, which are stored in the memory 21 and executed by the processor 20 to complete the present invention. The one or more units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 22 in the terminal device 2. For example, the computer program 22 may be divided into a liquid level difference acquisition module 10, a hydraulic pressure determination module 11, a tank pressure acquisition module 12, and a detection result generation module 13, and the specific functions of each module are as described above.

[0089] The terminal device may include, but is not limited to, a processor 20 and a memory 21. Those skilled in the art will appreciate that Figure 7It is only an example of the terminal device 2 and does not constitute a limitation of the terminal device 2. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0090] The processor 20 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0091] The memory 21 may be an internal storage unit of the terminal device 2, such as a hard disk or memory of the terminal device 2. The memory 21 may also be an external storage device of the terminal device 2, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal device 2. Further, the memory 21 may also include both an internal storage unit and an external storage device of the terminal device 2. The memory 21 is used to store the computer program and other programs and data required by the terminal device. The memory 21 may also be used to temporarily store data that has been output or is to be output.

[0092] The embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following can be achieved:

[0093] The oil tank to be tested is adjusted to a full oil level condition, and a liquid level difference of the oil tank valve body in the oil tank to be tested is collected under the full oil level condition, wherein the liquid level difference is used to characterize a height difference between the oil tank valve body and the oil level in the oil tank to be tested;

[0094] determining a hydraulic pressure value of the oil tank valve body according to the liquid level difference;

[0095] Pumping oil from the oil tank to be tested according to a preset pumping rate, and collecting the oil tank pressure of the oil tank to be tested in real time to obtain oil tank pressure information;

[0096] A pressure change image is drawn according to the oil tank pressure information, a valve body air supply node is determined according to the pressure change image, and a performance test result of the oil tank to be tested is generated according to the valve body air supply node.

[0097] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for detecting fuel tank performance, characterized in that: include: The oil tank to be tested is adjusted to a full oil level condition, and a liquid level difference of the oil tank valve body in the oil tank to be tested is collected under the full oil level condition, wherein the liquid level difference is used to characterize a height difference between the oil tank valve body and the oil level in the oil tank to be tested; determining a hydraulic pressure value of the oil tank valve body according to the liquid level difference; Pumping oil from the oil tank to be tested according to a preset pumping rate, and collecting the oil tank pressure of the oil tank to be tested in real time to obtain oil tank pressure information; A pressure change image is drawn according to the oil tank pressure information, a valve body air supply node is determined according to the pressure change image, and a performance test result of the oil tank to be tested is generated according to the valve body air supply node.

2. The fuel tank performance detection method according to claim 1, characterized in that: The step of determining the valve body air supply node according to the pressure change image includes: Respectively acquiring pressure differences between adjacent pressure nodes in the pressure change image, and determining pressure change trends between corresponding adjacent pressure nodes according to the pressure differences; If the pressure variation trend between any of the pressure nodes and the adjacent pressure nodes is different, the pressure node is determined as the valve body air supply node.

3. The fuel tank performance detection method according to claim 2, characterized in that: After determining the pressure node as the valve body air supply node, the method further includes: If a plurality of the valve body air supply nodes are determined in the pressure change image, the air supply time point of each valve body air supply node is obtained respectively; The valve body air supply node is screened according to the air supply time point.

4. The fuel tank performance detection method according to claim 1, characterized in that: The formula used to determine the hydraulic pressure value of the oil tank valve body according to the liquid level difference is: P v =8.2hkpa Where, h is the liquid level difference, P v is the hydraulic pressure value.

5. The fuel tank performance detection method according to any one of claims 1 to 4, characterized in that: Before the oil pumping operation is performed on the oil tank to be tested according to the preset oil pumping rate, the method further includes: Determining the vapor space area in the oil tank to be tested under a full oil level condition according to the oil level in the oil tank to be tested; A pressure sensor is arranged in the steam space area, and the pressure sensor is used to collect the tank pressure of the oil tank to be tested.

6. A fuel tank performance detection system, characterized in that: include: A liquid level difference acquisition module is used to adjust the oil tank to be tested to a full oil level condition, and to acquire a liquid level difference of the oil tank valve body in the oil tank to be tested under the full oil level condition, wherein the liquid level difference is used to characterize a height difference between the oil tank valve body and the oil level in the oil tank to be tested; A hydraulic pressure determination module, used to determine the hydraulic pressure value of the oil tank valve body according to the liquid level difference; The oil tank pressure acquisition module is used to perform an oil pumping operation on the oil tank to be tested according to a preset oil pumping rate, and to collect the oil tank pressure of the oil tank to be tested in real time to obtain oil tank pressure information; The detection result generating module is used to draw a pressure change image according to the oil tank pressure information, determine the valve body air supply node according to the pressure change image, and generate the performance detection result of the oil tank to be tested according to the valve body air supply node.

7. The fuel tank performance detection system according to claim 6, characterized in that: The detection result generation module is also used for: Respectively acquiring pressure differences between adjacent pressure nodes in the pressure change image, and determining pressure change trends between corresponding adjacent pressure nodes according to the pressure differences; If the pressure variation trend between any of the pressure nodes and the adjacent pressure nodes is different, the pressure node is determined as the valve body air supply node.

8. The fuel tank performance detection system according to claim 7, characterized in that: The detection result generation module is also used for: If a plurality of the valve body air supply nodes are determined in the pressure change image, the air supply time point of each valve body air supply node is obtained respectively; The valve body air supply node is screened according to the air supply time point.

9. A terminal 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 computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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