Method and system for detecting fixed torque of fuel gas cylinder of vehicle, vehicle and equipment

Abstract

The invention discloses a fixed torque detection method and system for a fuel gas cylinder of a vehicle, the vehicle and equipment. The method for detecting the fixed torque of the fuel gas cylinder of the vehicle comprises the steps that the torque of a bandage fixing bolt for fixing the gas cylinder is obtained, and the friction force between the gas cylinder and a bandage is obtained according to the torque of the bandage fixing bolt; the thrust of the gas cylinder is obtained; and according to the friction force and the thrust, whether the torque of the bandage fixing bolt meets the requirement or not is determined. By adopting the device and the method, whether the torque of the bandage fixing bolt meets the requirement or not can be accurately detected, blind setting of the torque of the bandage fixing bolt according to experience is avoided, the safety of the gas cylinder is ensured, analysis and checking are directly performed in advance at a design end without waiting for a finished product, the detection efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, system, vehicle and equipment for detecting a fixed torque of a fuel cylinder of a vehicle. Background Art

[0002] With the rapid development of hydrogen energy, hydrogen energy vehicles have also begun to be widely used. As an important component of hydrogen energy vehicles, gas cylinders are more important in terms of safety. At present, most gas cylinders are fixed by straps, which are tightened by bolts and the frame body, and the friction between the straps and the gas cylinders is used to fix the gas cylinders. Therefore, a suitable pre-tightening torque of the strap bolts is very important for the fixation of gas cylinders.

[0003] In the related art, the pre-tightening torque of the strap bolt is often determined based on previous experience, but the sizes of gas cylinders vary greatly, and the tightening torque of the bolt cannot be generalized. Alternatively, the pre-tightening torque of the strap bolt is determined through experiments, but this method requires the finished product to be manufactured before the test can be carried out, which is inconvenient. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle's fuel cylinder fixing torque detection method, system, vehicle and equipment to address the above-mentioned technical problems, which can accurately detect whether the torque of the strap fixing bolts meets the requirements, avoid blindly setting the torque of the strap fixing bolts based on experience, ensure the safety of the cylinder, and perform analysis and verification directly at the design end in advance without waiting for the finished product, thereby improving detection efficiency and reducing costs.

[0005] In a first aspect, a method for detecting a fixed torque of a fuel cylinder of a vehicle is provided, comprising:

[0006] Obtaining a torque of a fixing bolt of a strap for fixing the gas cylinder, and obtaining a friction force between the gas cylinder and the strap according to the torque of the fixing bolt of the strap;

[0007] obtaining the thrust of the gas cylinder;

[0008] According to the friction force and the thrust, it is determined whether the torque of the strap fixing bolt meets the requirement.

[0009] In some examples, obtaining a torque of a fixing bolt of a strap that fixes the gas cylinder, and obtaining a friction force between the gas cylinder and the strap according to the torque of the fixing bolt of the strap, includes:

[0010] Obtaining the torque of the strap fixing bolts for fixing the gas cylinder;

[0011] Calculating the tension of the strap according to the torque of the strap fixing bolt;

[0012] Obtaining the positive pressure of the gas cylinder according to the tension of the strap;

[0013] The friction force between the gas cylinder and the strap is obtained according to the positive pressure.

[0014] In some examples, calculating the strap tension according to the strap fixing bolt torque includes:

[0015] Obtain the nominal diameter and tightening torque coefficient of the fixing bolts;

[0016] The tension of the binding strap is obtained according to the torque of the binding strap fixing bolt, the nominal diameter of the fixing bolt and the tightening torque coefficient.

[0017] In some examples, obtaining the positive pressure of the gas cylinder according to the tension of the strap includes:

[0018] Obtaining the angle between the contact area of ​​the strap and the gas cylinder and the angle between the contact area of ​​the bottle holder and the gas cylinder;

[0019] The positive pressure of the gas cylinder is obtained according to the tension of the strap, the angle between the strap and the contact area of ​​the gas cylinder, and the angle between the bottle holder and the contact area of ​​the gas cylinder.

[0020] In some examples, obtaining the friction force between the gas cylinder and the strap according to the positive pressure includes:

[0021] Obtain the coefficient of friction and number of straps;

[0022] The friction force is obtained according to the normal pressure, the friction coefficient and the number of straps.

[0023] In some examples, obtaining the thrust of the gas cylinder includes:

[0024] Obtaining the weight and volume of the gas cylinder;

[0025] The thrust of the gas cylinder is obtained according to the weight and volume of the gas cylinder.

[0026] In some examples, determining whether the torque of the strap fixing bolt meets the requirement according to the friction force and the thrust force includes:

[0027] obtaining a ratio between the friction force and the thrust;

[0028] determining whether the ratio is within a predetermined range;

[0029] If yes, it is determined that the torque of the binding strap fixing bolt meets the requirement, otherwise it is determined that the torque of the binding strap fixing bolt does not meet the requirement.

[0030] In a second aspect, a fixed torque detection system for a fuel cylinder of a vehicle is provided, comprising:

[0031] A friction force calculation module, used to obtain the torque of the strap fixing bolts for fixing the gas cylinder, and obtain the friction force between the gas cylinder and the strap according to the torque of the strap fixing bolts;

[0032] A thrust acquisition module, used to acquire the thrust of the gas cylinder;

[0033] The detection module is used to determine whether the torque of the strap fixing bolt meets the requirements based on the friction force and the thrust.

[0034] In a third aspect, a vehicle is provided, comprising: a fixed torque detection system for a fuel cylinder of the vehicle according to the second aspect.

[0035] In a fourth aspect, a computer device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of the method for detecting the fixed torque of a fuel cylinder of a vehicle according to the first aspect and any possible implementation of the first aspect are implemented.

[0036] In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the steps of the method for detecting the fixed torque of a fuel cylinder of a vehicle according to the first aspect and any possible implementation of the first aspect are implemented.

[0037] In a sixth aspect, a computer program product is provided, on which a computer program is stored, and when the program is executed by a processor, the steps of the method for detecting the fixed torque of a fuel cylinder of a vehicle according to the first aspect and any possible implementation of the first aspect are implemented.

[0038] By adopting the embodiments of the present application, it is possible to accurately detect whether the torque of the strap fixing bolt meets the requirements, avoiding blindly setting the torque of the strap fixing bolt based on experience, ensuring the safety of the gas cylinder, and performing analysis and verification directly at the design end in advance without waiting for the finished product, thereby improving detection efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0040] Figure 1 A flow chart of a method for detecting a fixed torque of a fuel cylinder of a vehicle provided in an embodiment of the present application;

[0041] Figure 2 This is the projection diagram of the gas cylinder;

[0042] Figure 3 is the force diagram of the strap;

[0043] Figure 4 A detailed flow chart of a method for detecting a fixed torque of a fuel cylinder of a vehicle provided in an embodiment of the present application;

[0044] Figure 5 A structural block diagram of a fixed torque detection system for a fuel cylinder of a vehicle provided in an embodiment of the present application;

[0045] Figure 6 A structural block diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0046] The present application is further described in detail below in conjunction with the embodiments and drawings. It is to be understood that the specific embodiments described herein are only used to explain the relevant application, rather than to limit the application. It is also necessary to explain that, for ease of description, only the parts related to the application are shown in the drawings.

[0047] It should be noted that, in the absence of conflict, the embodiments of the present application, that is, the features of the embodiments, can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0048] The following describes in detail the method, system, device and medium for detecting the fixing torque of the fuel cylinder of a vehicle according to the embodiments of the present application in conjunction with the accompanying drawings.

[0049] The implementation environment of the vehicle fuel cylinder fixed torque detection method of the embodiment of the present application can be a computer device, and the computer device can be various types of devices with information processing capabilities during the implementation process. For example, the computer device can include a personal computer, a laptop, a palmtop computer or a server, etc.; the computer device can also be a mobile terminal, for example, the mobile terminal can include a mobile phone, a vehicle-mounted computer, a tablet computer or a projector, etc.

[0050] The fuel gas cylinder is, for example, a hydrogen fuel gas cylinder, that is, the vehicle is a hydrogen fuel vehicle.

[0051] Figure 1 FIG. 1 is a flow chart of a method for detecting a fixed torque of a fuel cylinder of a vehicle according to an embodiment of the present application. Figure 1 As shown, the method for detecting the fixed torque of the fuel cylinder of a vehicle according to an embodiment of the present application includes the following steps:

[0052] S101: Obtain the torque of a fixing bolt of a strap for fixing the gas cylinder, and obtain the friction force between the gas cylinder and the strap according to the torque of the fixing bolt of the strap.

[0053] In one embodiment of the present application, a torque of a strap fixing bolt for fixing a gas cylinder is obtained, and based on the torque of the strap fixing bolt, a friction force between the gas cylinder and the strap is obtained, including: obtaining the torque of the strap fixing bolt for fixing the gas cylinder; calculating the strap tension based on the torque of the strap fixing bolt; obtaining the positive pressure of the gas cylinder based on the strap tension; and obtaining the friction force between the gas cylinder and the strap based on the positive pressure.

[0054] In the above example, calculating the strap tension according to the strap fixing bolt torque includes: obtaining the nominal diameter and tightening torque coefficient of the fixing bolt; and obtaining the strap tension according to the strap fixing bolt torque, the nominal diameter and tightening torque coefficient of the fixing bolt.

[0055] In the above example, obtaining the positive pressure of the gas cylinder according to the tension of the strap includes: obtaining the angle between the contact area of ​​the strap and the gas cylinder and the angle between the contact area of ​​the bottle holder and the gas cylinder; obtaining the positive pressure of the gas cylinder according to the tension of the strap, the angle between the contact area of ​​the strap and the gas cylinder and the angle between the contact area of ​​the bottle holder and the gas cylinder.

[0056] In this example, obtaining the friction force between the gas cylinder and the strap according to the positive pressure includes: obtaining a friction coefficient and the number of straps; and obtaining the friction force according to the positive pressure, the friction coefficient and the number of straps.

[0057] S102: Obtain the thrust of the gas cylinder.

[0058] In a specific example, obtaining the thrust of the gas cylinder includes: obtaining the weight and volume of the gas cylinder; and obtaining the thrust of the gas cylinder according to the weight and volume of the gas cylinder.

[0059] S103: Determine whether the torque of the strap fixing bolt meets the requirement according to the friction force and the thrust.

[0060] In one embodiment of the present application, determining whether the torque of the strap fixing bolt meets the requirements is performed based on the friction force and the thrust, including: obtaining the ratio between the friction force and the thrust; judging whether the ratio is within a predetermined range; if so, determining that the torque of the strap fixing bolt meets the requirements, otherwise determining that the torque of the strap fixing bolt does not meet the requirements.

[0061] Specifically, combined Figure 2 , Figure 3 and Figure 4 ,like Figure 2 As shown, it is a projection diagram of the gas cylinder provided in the embodiment of the present application. Figure 2 The projection diagram of the gas cylinder shown is obtained by projecting along the axial direction of the gas cylinder. Figure 2There are fixing bolts and fixing nuts, which cooperate with each other to tighten the strap. Figure 2 After the middle strap is tightened, the gas cylinder is pressed down to the bottle holder, thereby fixing the gas cylinder. In the art, the fixing bolt and the fixing nut are also called the strap fixing bolt and the strap fixing nut.

[0062] According to the standard, a force of 8 times the mass of the cylinder after it is filled is applied to the cylinder, and the relative displacement of the cylinder is required to be less than 13mm. One of the sources of cylinder displacement is the thrust on the cylinder, which is applied from the outside along the cylinder axis. Figure 2 It can be found that the axial direction of the gas cylinder is fixed by the friction between the strap and the gas cylinder. To ensure that the gas cylinder does not move, the maximum static friction between the gas cylinder and the strap needs to be slightly greater than the sliding friction.

[0063] like Figure 3 As shown, it is a force diagram of the binding strap provided in the embodiment of the present application. Figure 3 The tension on both sides of the middle strap is F, the angle between the strap and the contact area of ​​the gas cylinder is α, and the angle between the bottle holder and the contact area of ​​the gas cylinder is β. The upper and lower force conditions are the same. After the gas cylinder is pressed down by the strap, it will be subjected to a positive pressure N, and the positive pressure will cause friction to the gas cylinder.

[0064] Therefore, the tension of the strap can be calculated based on the torque of the strap fixing bolt, and the positive pressure of the gas cylinder can be calculated based on the tension of the strap. The friction force can be calculated based on the positive pressure.

[0065] In one embodiment of the present application, the calculating the strap tension according to the strap fixing bolt torque includes: obtaining the strap tension according to the strap fixing bolt torque, the bolt nominal diameter and the tightening torque coefficient.

[0066] The strap tension F is obtained based on the strap fixing bolt torque T and the bolt nominal diameter d.

[0067] For example, the calculation formula for the strap tension F is:

[0068] F=T / k*d

[0069] Among them, T is the torque of the strap fixing bolt, k is the tightening torque coefficient, which is generally taken as 0.2, and d is the nominal diameter of the bolt of the strap fixing bolt torque.

[0070] In one embodiment of the present application, calculating the positive pressure of the gas cylinder based on the strap tension includes: obtaining the positive pressure of the gas cylinder based on the strap tension, the angle between the strap and the contact area of ​​the gas cylinder, and the angle between the bottle holder and the gas cylinder.

[0071] According to the contact angles α and β between the gas cylinder strap and the bottle holder and the gas cylinder, the positive pressure N on the gas cylinder can be obtained. Figure 3As shown, the force on the strap and the gas cylinder is an interaction force, so the force is the same as that on the strap but in the opposite direction, and the force on the gas cylinder is evenly distributed on the contact part.

[0072] Assuming the contact pressure density is k and the cylinder diameter is R, the total pressure N1 perpendicular to the chord AB can be calculated by the following formula:

[0073]

[0074] The cylinder is at rest, so the forces are balanced, so the above formula can be transformed into:

[0075]

[0076] Similarly, the total pressure N2 on the gas cylinder at the bottle holder is calculated as follows:

[0077]

[0078] Then the positive pressure N of the gas cylinder is equal to N1+N2.

[0079] In one embodiment of the present application, calculating the friction force based on the normal pressure includes: obtaining the friction force based on the normal pressure, the friction coefficient and the number of straps.

[0080] Based on the friction coefficient μ between the bottle holder such as a rubber pad and the gas cylinder and the number of straps n, the friction force f between the gas cylinder and the straps is obtained. For example, the friction force can be calculated using the following formula:

[0081] f=n·μ*N

[0082] Among them, f is the friction force, μ is the friction coefficient, n is the number of straps, and N is the normal pressure.

[0083] When obtaining the thrust of the gas cylinder, specifically

[0084] The force model of the gas cylinder is established and the thrust of the gas cylinder is obtained through analysis.

[0085] In one embodiment of the present application, obtaining the thrust of the gas cylinder includes: obtaining the thrust according to the weight of the gas cylinder and the volume of the gas cylinder.

[0086] According to the weight W and volume V of the gas cylinder, the thrust F is obtained t For example, thrust F t It is calculated using the following formula:

[0087] F t =8*(W+ρV)*g

[0088] Among them, W is the weight of the gas cylinder, V is the volume of the gas cylinder, ρ is the density of hydrogen, which is determined by the pressure of the gas cylinder. In the prior art, the pressure in the gas cylinder is usually 35MPa or 70MPa, the density of 35MPa is 0.024kg / L, and the density of 70MPa is 0.0401kg / L. g is the acceleration of gravity, which is 9.8m / s2. Because the national standard requires that a force of 8 times the mass of the gas cylinder after it is filled be applied to the gas cylinder, the relative displacement of the gas cylinder is required to be less than 13mm. When the national standard changes, this value will change accordingly.

[0089] In the process of obtaining the ratio of the thrust force to the friction force; and if the ratio is within a preset range, determining that the torque of the strap fixing bolt meets the requirement:

[0090] Compare the friction force f and the thrust force F t , and determine the ratio of the two.

[0091] For example, if 1.5≤f / Ft≤2.5, the output torque meets the requirement. If f / Ft<1.5 or f / Ft>2.5, the output torque does not meet the requirement, reset the torque, and then perform torque detection.

[0092] In this way, it is possible to accurately detect whether the torque of the strap fixing bolts meets the requirements, avoiding blindly setting the torque of the strap fixing bolts based on experience, ensuring the safety of the gas cylinder, and performing analysis and verification directly at the design end in advance without waiting for the finished product, thereby improving detection efficiency and reducing costs.

[0093] The method of the embodiment of the present application converts the fixed structure into a physical mechanics model. By setting different parameters, the pre-tightening torque can be directly theoretically checked, and analysis and verification can be performed in advance at the design end, so that modifications and risk avoidance can be performed in advance. The pre-tightening torque of the strap can be checked for different gas cylinders to meet the fixing effect of different gas cylinders.

[0094] The following describes an exemplary application of the embodiments of the present application in a practical application scenario.

[0095] Figure 4 Detailed flow chart of the detection method of the present application embodiment. Figure 4 As shown, including steps 1 to 5:

[0096] According to the national standard, a force of 8 times the mass of the gas cylinder after it is filled is applied to the gas cylinder, and the relative displacement of the gas cylinder is required to be less than 13mm. The axial direction of the gas cylinder is fixed by the friction between the strap and the gas cylinder to ensure that the gas cylinder does not move. Since the maximum static friction force is slightly larger than the sliding friction force, the method of this application compares the magnitude of the sliding friction force with the thrust.

[0097] The steps for detecting the strap pre-tightening torque are as follows:

[0098] Step 1: Input the torque T of the strap fixing bolt and the nominal diameter d of the bolt to obtain the strap tension F. The strap tension F is obtained based on the torque T of the strap fixing bolt and the nominal diameter d of the bolt.

[0099] For example, the calculation formula for the strap tension F is:

[0100] F=T / k*d

[0101] Step 2: Input the contact angles α and β between the gas cylinder strap and the bottle holder and the gas cylinder to obtain the positive pressure N on the gas cylinder.

[0102] like Figure 3 As shown, the tension on both sides of the strap is F, the angle between the strap and the contact area of ​​the gas cylinder is α, and the angle between the bottle holder and the contact area of ​​the gas cylinder is β. The upper and lower forces are the same. Now take the strap as an example to illustrate the force model: the force on the strap and the gas cylinder is an interaction force, so the force is the same as the strap in magnitude and opposite in direction. The force on the gas cylinder is evenly distributed in the contact part. Assuming that the contact pressure density is k, the total pressure N1 perpendicular to the chord AB is:

[0103]

[0104] The cylinder is at rest, so the forces are balanced, therefore:

[0105]

[0106] Similarly, the total pressure N2 on the gas cylinder at the bottle holder is:

[0107] To sum up, N=N1+N2.

[0108] Step 3: Input the friction coefficient μ between the rubber pad and the gas cylinder and the number of straps n to obtain the friction force f between the gas cylinder and the straps. For example, the friction force can be calculated using the following formula:

[0109] f=n·μ*N

[0110] Step 4: Input the weight W and volume V of the gas cylinder to obtain the thrust Ft. For example, the thrust Ft is calculated using the following formula:

[0111] F t =8*(W+ρV)*g

[0112] Step 5: Compare the friction force f and the thrust Ft. If 1.5≤f / F t ≤2.5, the output torque meets the requirements; if f / F t <1.5 or f / F t >2.5, the output torque does not meet the requirements, reset the torque and repeat steps 1-5 until the appropriate torque is found.

[0113] Figure 4 The detection method shown converts the cylinder fixing structure into a physical mechanics model. By setting different parameters, the pre-tightening torque can be directly theoretically verified. This method can verify the pre-tightening torque of the strap for different cylinders to meet the fixing effect of different cylinders; it can be analyzed and verified in advance at the design end, and modifications and risk avoidance can be made in advance.

[0114] According to the fixing torque detection method of the fuel cylinder of a vehicle in the embodiment of the present application, it is possible to accurately detect whether the torque of the strap fixing bolt meets the requirements, avoiding the blind setting of the strap fixing bolt torque based on experience, ensuring the safety of the cylinder, and performing analysis and verification directly at the design end in advance without waiting for the finished product, thereby improving detection efficiency and reducing costs.

[0115] Figure 5 FIG. 1 is a structural block diagram of a fixed torque detection system for a fuel cylinder of a vehicle according to an embodiment of the present application. Figure 5 As shown, according to an embodiment of the present application, a fixed torque detection system for a fuel cylinder of a vehicle includes: a friction calculation module 510, a thrust acquisition module 520 and a detection module 530, wherein:

[0116] The friction force calculation module 510 is used to obtain the torque of the strap fixing bolts for fixing the gas cylinder, and obtain the friction force between the gas cylinder and the strap according to the torque of the strap fixing bolts;

[0117] A thrust acquisition module 520, used to acquire the thrust of the gas cylinder;

[0118] The detection module 530 is used to determine whether the torque of the strap fixing bolt meets the requirement according to the friction force and the thrust.

[0119] According to the fixing torque detection system of the fuel cylinder of the vehicle according to the embodiment of the present application, it is possible to accurately detect whether the torque of the strap fixing bolt meets the requirements, thereby avoiding blindly setting the torque of the strap fixing bolt based on experience, ensuring the safety of the cylinder, and performing analysis and verification directly at the design end in advance without waiting for the finished product, thereby improving detection efficiency and reducing costs.

[0120] The specific definition of the fixed torque detection system of the fuel cylinder of the vehicle can be found in the definition of the fixed torque detection method of the fuel cylinder of the vehicle mentioned above, which will not be repeated here. The various modules of the fixed torque detection system of the fuel cylinder of the vehicle mentioned above can be implemented in whole or in part by software, hardware and their combination. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0121] In one embodiment, a vehicle is provided, comprising: a fixing torque detection system for a fuel gas cylinder of a vehicle according to any one of the above embodiments. The vehicle can accurately detect whether the torque of the fixing bolt of the strap meets the requirements, avoids blindly setting the torque of the fixing bolt of the strap based on experience, ensures the safety of the gas cylinder, and directly performs analysis and verification in advance at the design end without waiting for the finished product, thereby improving detection efficiency and reducing costs.

[0122] In addition, other structures and functions of the vehicle according to the embodiment of the present application are known to ordinary technicians in the field and will not be elaborated here.

[0123] In one embodiment, a computer device is provided. Figure 6 This is a block diagram of the computer device provided in the embodiment of the present application, refer to Figure 6 The computer device includes a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the fixing torque detection method embodiment of the fuel gas cylinder of the vehicle is implemented. For example, the following is performed: obtaining the fixing bolt torque of the strap fixing the gas cylinder, and obtaining the friction force between the gas cylinder and the strap according to the fixing bolt torque of the strap;

[0124] obtaining the thrust of the gas cylinder;

[0125] According to the friction force and the thrust, it is determined whether the torque of the strap fixing bolt meets the requirement.

[0126] The embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. When the processor executes the computer program, the above-mentioned method for detecting the fixing torque of the fuel cylinder of the vehicle is implemented. For example, the following steps are performed: obtaining the torque of the fixing bolt of the strap that fixes the gas cylinder, and obtaining the friction force between the gas cylinder and the strap according to the torque of the fixing bolt of the strap;

[0127] obtaining the thrust of the gas cylinder;

[0128] According to the friction force and the thrust, it is determined whether the torque of the strap fixing bolt meets the requirement.

[0129] The present application embodiment provides a computer program product, which includes instructions. When the instructions are executed, the method described in the embodiment of the present application is executed. For example, it can be executed Figure 1 The various steps of the method for detecting the fixing torque of the fuel cylinder of the vehicle shown are, for example, performed as follows: obtaining the torque of the fixing bolt of the strap fixing the cylinder, and obtaining the friction force between the cylinder and the strap according to the torque of the fixing bolt of the strap;

[0130] obtaining the thrust of the gas cylinder;

[0131] According to the friction force and the thrust, it is determined whether the torque of the strap fixing bolt meets the requirement.

[0132] Those of ordinary skill in the art can understand that all or part of the processes in the methods for implementing the above-mentioned embodiments can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0133] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A method for detecting the fixed torque of a fuel cylinder of a vehicle, characterized in that: include: Obtaining a torque of a fixing bolt of a strap for fixing the gas cylinder, and obtaining a friction force between the gas cylinder and the strap according to the torque of the fixing bolt of the strap; obtaining the thrust of the gas cylinder; According to the friction force and the thrust, it is determined whether the torque of the strap fixing bolt meets the requirement.

2. The method for detecting the fixing torque of a fuel cylinder of a vehicle according to claim 1, characterized in that: The step of obtaining the torque of a fixing bolt of a strap for fixing the gas cylinder, and obtaining the friction force between the gas cylinder and the strap according to the torque of the fixing bolt of the strap, comprises: Obtaining the torque of the strap fixing bolts for fixing the gas cylinder; Calculating the tension of the strap according to the torque of the strap fixing bolt; Obtaining the positive pressure of the gas cylinder according to the tension of the strap; The friction force between the gas cylinder and the strap is obtained according to the positive pressure.

3. The method for detecting the fixing torque of a fuel cylinder of a vehicle according to claim 2, characterized in that: The calculating the tension of the binding strap according to the torque of the binding strap fixing bolt comprises: Obtain the nominal diameter and tightening torque coefficient of the fixing bolts; The tension of the binding strap is obtained according to the torque of the binding strap fixing bolt, the nominal diameter of the fixing bolt and the tightening torque coefficient.

4. The method for detecting the fixing torque of a fuel cylinder of a vehicle according to claim 2, characterized in that: The obtaining the positive pressure of the gas cylinder according to the tension of the strap comprises: Obtaining the angle between the contact area of ​​the strap and the gas cylinder and the angle between the contact area of ​​the bottle holder and the gas cylinder; The positive pressure of the gas cylinder is obtained according to the tension of the strap, the angle between the strap and the contact area of ​​the gas cylinder, and the angle between the bottle holder and the contact area of ​​the gas cylinder.

5. The method for detecting the fixing torque of a fuel cylinder of a vehicle according to any one of claims 2 to 4, characterized in that: The step of obtaining the friction force between the gas cylinder and the strap according to the positive pressure comprises: Obtain the coefficient of friction and number of straps; The friction force is obtained according to the normal pressure, the friction coefficient and the number of straps.

6. The method for detecting the fixing torque of a fuel cylinder of a vehicle according to claim 1, characterized in that: The obtaining of the thrust of the gas cylinder comprises: Obtaining the weight and volume of the gas cylinder; The thrust of the gas cylinder is obtained according to the weight and volume of the gas cylinder.

7. The method for detecting the fixing torque of a fuel cylinder of a vehicle according to claim 1, characterized in that: The step of determining whether the torque of the strap fixing bolt meets the requirement according to the friction force and the thrust force includes: obtaining a ratio between the friction force and the thrust; determining whether the ratio is within a predetermined range; If yes, it is determined that the torque of the binding strap fixing bolt meets the requirement, otherwise it is determined that the torque of the binding strap fixing bolt does not meet the requirement.

8. A fixed torque detection system for a fuel cylinder of a vehicle, characterized in that: include: A friction force calculation module, used to obtain the torque of the strap fixing bolts for fixing the gas cylinder, and obtain the friction force between the gas cylinder and the strap according to the torque of the strap fixing bolts; A thrust acquisition module, used to acquire the thrust of the gas cylinder; The detection module is used to determine whether the torque of the strap fixing bolt meets the requirements based on the friction force and the thrust.

9. A vehicle, characterized in that: include: The fixing torque detection system for the fuel cylinder of a vehicle according to claim 8.

10. 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, the method for detecting the fixed torque of the fuel cylinder of the vehicle according to any one of claims 1 to 7 is implemented.

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