Measuring system, measuring equipment and measuring method for arc shape of sealing head of gas storage cylinder

Abstract

The invention relates to the technical field of gas storage cylinder collection, and provides a gas storage cylinder seal head arc measurement system, measurement equipment and measurement method, and the method comprises the steps: A, obtaining a target gas storage cylinder seal head arc curve and the type of a target gas storage cylinder; and B, on the winding fiber design of the target gas cylinder, the number and the positions of fiber yarn falling points are determined according to the arc-shaped curve of the end socket of the target gas cylinder and the corresponding type, and the optimal fiber winding of the target gas cylinder is designed through the fiber yarn falling points. According to the method, the arc curve of the target gas storage cylinder end socket can be quickly and accurately obtained.

Description

Technical Field

[0001] This invention relates to the field of gas cylinder sampling technology, specifically to a gas cylinder end cap arc measurement system, measuring equipment, and measuring method. Background Technology

[0002] Gas cylinders, as core equipment for the storage and transportation of high-pressure gases (such as hydrogen, compressed natural gas, and industrial gases), are widely used in new energy vehicles, industrial production, and special equipment. The end cap, as a key pressure-bearing structure of the gas cylinder, directly determines the core performance of the equipment due to its curved profile: on the one hand, the precision of the curved shape affects the force transmission during fiber winding; on the other hand, the adaptability of the curved shape determines the stability of the clamp fixation (avoiding slippage during transportation / use) and the protective effectiveness of the protective cover (preventing collision damage); simultaneously, the integrity of the curved shape is the core basis for determining whether there are any safety hazards in the gas cylinder (such as deformation or dents that may lead to stress concentration and cause an explosion).

[0003] In existing technologies, mechanical contact measurement is the most common method used by small and medium-sized gas cylinder manufacturers and in maintenance scenarios, relying on rigid measuring tools and manual readings. This involves collecting discrete coordinate points or measuring gaps using feeler gauges on curved plates (only determining compliance, not quantifying data, and adapting to a single specification). It is evident that existing technologies generally suffer from insufficient accuracy, low efficiency, poor adaptability, and a lack of automated data processing, making it difficult to meet the needs of various types of gas cylinders for precise curved plate measurements. Summary of the Invention

[0004] The present invention aims to provide a gas cylinder end cap arc measurement system, measuring equipment and measuring method to quickly and accurately obtain the arc curve of the target gas cylinder end cap.

[0005] The first scheme is a method for measuring the arc shape of the end cap of a gas cylinder, comprising: A: obtaining the arc curve of the end cap of the target gas cylinder and the type of the target gas cylinder; B: in the design of the winding fiber of the target gas cylinder, determining the number and position of the fiber yarn landing points according to the arc curve of the end cap of the target gas cylinder and the corresponding type, and designing the optimal fiber winding of the target gas cylinder by the fiber yarn landing points.

[0006] Beneficial effects: By adopting the core logic of "obtaining the end cap arc curve and gas cylinder type + targeted design of fiber winding", the limitations of existing fiber winding that relies on theoretical arcs are broken. By using the actual arc curve that is accurately measured, the number and position of fiber yarn landing points are determined. This avoids the problems of fiber accumulation and strength redundancy at the end cap, and ensures that the axial bearing capacity of the fiber meets the design requirements through quantitative calculation. This achieves a high degree of consistency between design and process, significantly improving the structural strength, quality stability and service life of the gas cylinder, and is especially suitable for the high-precision production requirements of Type III / IV fully wound gas cylinders.

[0007] Preferably, it also includes C: on the clamp designed for fixing and supporting the target gas cylinder, the size structure of the clamp is determined according to the arc curve of the end cap of the target gas cylinder.

[0008] Beneficial effects: Building upon the core measurement and fiber winding design, a customized design for the clamp size and structure has been added. By matching the actual arc curve of the target gas cylinder's end cap, it precisely avoids transition sections, solving the problems of slippage and localized stress concentration inherent in universal clamps. The clamp, customized based on arc parameters, achieves a tight fit with the end cap, adapting to the arc differences between different batches of gas cylinders. This significantly improves the stability of the gas cylinder during transportation, installation, and use, effectively reducing the risk of cylinder displacement or damage due to improper clamp fit, and is especially suitable for gas cylinders with short cylinder lengths.

[0009] Preferably, it also includes D: on the gas cylinder protective cover designed to protect the target gas cylinder, the size structure of the gas cylinder protective cover is determined according to the arc curve of the target gas cylinder head.

[0010] Beneficial Effects: The gas cylinder protective cover design, based on the actual arc curve, eliminates the fitting defects of traditional standard hemispherical protective covers. By customizing the size and structure of the protective cover according to the segmented curvature of the end cap, a precise fit between the protective cover and the gas cylinder is achieved. This avoids shaking caused by excessive gaps and prevents the problem of localized excessive tightness compressing the fiber layer. Furthermore, the differentiated wall thickness for different areas balances protective strength and lightweight requirements, effectively resisting impacts, providing dust and corrosion protection, and extending the service life of the gas cylinder. This is particularly crucial for the fiber layer protection of Type IV plastic liner + fully wound gas cylinders.

[0011] Preferably, the method further includes E: obtaining the actual arc curve of the target gas cylinder end cap and comparing it with the standard arc curve of the target gas cylinder end cap to determine whether the target gas cylinder end cap needs repair or scrapping; if the actual arc curve of the target gas cylinder end cap is not within the error range of its standard arc curve, then the target gas cylinder needs repair or scrapping; otherwise, the target gas cylinder can be used normally.

[0012] Beneficial effects: A quantitative comparison mechanism of "actual arc shape - standard arc shape" has been established, replacing the traditional subjective experience-based judgment method. By clearly defining the error range, accurate decision-making on the state of the gas cylinder's sealing head is achieved. It can identify safety hazards caused by arc shape deviations in advance, preventing unqualified gas cylinders from entering the usage stage. At the same time, it distinguishes between different scenarios of "normal use - requiring maintenance - requiring scrapping," which not only ensures usage safety but also avoids excessive scrapping of repairable gas cylinders, reducing usage costs. Furthermore, the judgment results are traceable, complying with the safety supervision requirements for special equipment.

[0013] Preferably, multiple discrete and ordered two-dimensional coordinate points of the actual cross-section of the target gas cylinder head are obtained by laser ranging. All discrete points are connected in sequence to form a preliminary arc-shaped profile of the gas cylinder head. The preliminary arc-shaped profile of the gas cylinder head with the preliminary straight lines is smoothed and optimized to generate the arc-shaped curve of the target gas cylinder head.

[0014] Beneficial effects: This method clarifies the acquisition method of arc-shaped curves. Discrete coordinate points are collected through laser ranging, and curves are generated by connecting straight lines and smoothing optimization. This approach leverages the high resolution of laser ranging to ensure the accuracy of the original data, while outlier removal and adaptive B-spline curve fitting effectively avoid interference factors such as reflections and blemishes, ensuring the curve accurately reflects the actual head contour. This method is suitable for complex arc-shaped Type III / IV gas cylinders. The generated curves provide a reliable geometric data foundation for subsequent fiber winding, clamping, protective cover design, and condition determination, significantly reducing design errors in subsequent stages.

[0015] Preferably, the target gas cylinders include Type I, Type II, Type III, and Type IV gas cylinders; wherein, Type I gas cylinders are made of steel cylinder material, Type II gas cylinders are made of metal liner and fiber circumferential wound material, Type III gas cylinders are made of metal liner and fully wound material, and Type IV gas cylinders are made of plastic liner and fully wound material.

[0016] Beneficial effects: The material and structural differences between Type I-IV gas cylinders were clearly defined, providing a clear basis for customized design in subsequent stages. By differentiating the structural characteristics of different types of gas cylinders (such as Type I pure steel and Type IV plastic inner liner + full winding), the design of fiber winding, clamps, and protective covers can be precisely matched with their respective material properties and usage requirements. This avoids the inadequacy caused by a "one-size-fits-all" design, further improving the pertinence and effectiveness of the overall technical solution, and ensuring that different types of gas cylinders can achieve optimal structural design and user experience.

[0017] Preferably, in step B, the axial bearing capacity provided by different fiber landing points is calculated using the following formula, and the target fiber landing point is selected based on the strength of the bearing capacity; the formula includes...

[0018] Where: P represents the internal pressure that the gas cylinder withstands, and the unit is Pa; This indicates the radius of the cylinder, in mm. The strength provided by the helical winding of the fiber; The thickness of the spirally wound fiber; The spiral winding angle for each layer; The strength provided for circumferentially wound fibers; The thickness of the circumferentially wound fiber; For each layer of circumferential winding angle (approximately 90°); The compressive strength provided for the spiral winding of fibers; The radius of each layer of the spiral winding; For the corresponding radius The individual winding fibers provide pressure resistance to the cylinder in the circumferential direction.

[0019] Beneficial effects: It provides a quantitative calculation method for the pressure-bearing capacity of fiber landing points. Through specific formulas, it accurately calculates the pressure-bearing contribution of fibers at different winding angles and radii, providing a scientific basis for selecting fiber landing points rather than relying on experience. This effectively avoids insufficient pressure bearing or fiber waste caused by unreasonable landing point design, ensuring that the axial pressure bearing capacity of the fiber layer meets design requirements. Simultaneously, it provides data support for the enlarged-hole design of helical winding, further optimizing the rationality and economy of fiber winding and improving the safety redundancy of gas cylinders.

[0020] The second solution involves a gas cylinder end cap arc measurement device, used to measure multiple discrete two-dimensional points of the arc curve of the target gas cylinder end cap and send the data to a terminal database, thereby implementing a gas cylinder end cap arc measurement method as described in the first solution. The gas cylinder end cap arc measurement device includes: a right-angle caliper, a laser rangefinder, a transmission component, and a measurement data processing component. The right-angle caliper is used to closely fit the target gas cylinder, providing precise positioning for the laser rangefinder. The laser rangefinder is used to measure the arc curve of the target gas cylinder. The measurement data processing component processes real-time measurement data, and the transmission component sends the measurement data to the terminal database. The laser rangefinder and the measurement data processing component are fixedly mounted on the right-angle caliper. The laser rangefinder is close to the measurement data processing component and electrically connected to it. The transmission component is fixedly mounted on the measurement data processing component and electrically connected to it.

[0021] Beneficial Effects: The measuring equipment, through its integrated design of "right-angle caliper positioning + laser ranging acquisition + data processing + transmission," achieves rapid and accurate acquisition of arc-shaped data for gas cylinder heads. The 90° angle design of the right-angle calipers ensures positioning accuracy, the laser ranging device provides high-resolution distance measurement, and the transmission component enables real-time data storage and sharing. The overall structure is simple and easy to operate, efficiently acquiring discrete two-dimensional coordinate points, providing stable and reliable hardware support for subsequent curve generation, design, and judgment, and adapting to the on-site measurement needs of different types of gas cylinders.

[0022] Preferably, the measurement data processing component includes a housing, a display screen, a start measurement button, a power on / off button, a measurement accuracy adjustment button, a data zeroing button, a secondary measurement button, an up button, a down button, an export button, and a delete button. The housing is equipped with the display screen, start measurement button, power on / off button, measurement accuracy adjustment button, data zeroing button, secondary measurement button, up button, down button, export button, and delete button. The housing is fixedly mounted on a right-angle caliper, and the housing is equipped with the same key combination.

[0023] Beneficial effects: The structure of the measurement data processing component is defined, and by integrating multi-functional buttons and a display screen, it achieves one-stop operation for measurement accuracy adjustment, data clearing, storage, and export. Its visual display screen provides real-time feedback on measurement data, and the diverse buttons adapt to different measurement scenarios (such as secondary measurements and data deletion). The button-style structure facilitates on-site operation, ensuring both the convenience and accuracy of data processing while improving the smoothness of the measurement process. It effectively adapts to batch measurement needs and reduces the workload for operators.

[0024] The third approach includes a data analysis module, which includes an electronic device. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it enables the electronic device to implement a gas cylinder end cap arc measurement method of the first approach. The memory is used to store multiple discrete two-dimensional points of the target gas cylinder end cap arc curve measured by a gas cylinder end cap arc measurement device of the second approach.

[0025] Beneficial Effects: The constructed measurement system, through the integration of data analysis modules and electronic equipment, achieves automated and intelligent operation of the entire technical solution. The processor executes computer programs to automatically complete operations such as data processing, curve fitting, fiber landing point calculation, and arc comparison. The memory securely stores measurement data and standard curves, and the bus connection ensures efficient collaboration among components. This system integrates core functions such as measurement, processing, analysis, and judgment, improving the overall automation level of the technical solution, adapting to efficient measurement and accurate decision-making in mass production, and significantly reducing errors caused by manual intervention. Attached Figure Description

[0026] Figure 1 This is a flowchart illustrating a method for measuring the arc shape of a gas cylinder end cap. Figure 2The types of gas cylinders are shown in the diagram, where (a) is a Type I gas cylinder, (b) is a Type III gas cylinder and a Type IV gas cylinder, and (c) is a Type II gas cylinder. The green box indicates the end cap. Figure 3 A schematic diagram of the arc-shaped curve of the gas cylinder's end cap; Figure 4 A schematic diagram showing the location of the fiber wrapping point on the gas storage cylinder; Figure 5 A schematic diagram of the connection structure between the clamp and the gas cylinder; Figure 6 A schematic diagram of the arc-shaped measuring device for the gas cylinder end cap; Figure 7 A partial structural schematic diagram of the arc-shaped measuring device for the gas cylinder end cap; Figure 8 Measure the front view of the gas cylinder using an arc-shaped measuring device for the gas cylinder end cap; Figure 9 This is a schematic diagram of the structure of an arc-shaped measuring system for the gas cylinder end cap, as described in Embodiment 3. Figure 10 This is a schematic diagram of the electronic equipment structure of an arc-shaped measurement system for a gas cylinder end cap, as described in Embodiment 3.

[0027] The reference numerals in the accompanying drawings include: 1. Right-angle calipers; 2. Data processing component; 3. Laser rangefinder; 4. Gas cylinder; 5. Horizontal calipers; 6. Vertical calipers; 7. Transmission component; 8. Start measurement button; 9. Power on / off button; 10. Measurement accuracy adjustment button; 11. Data clear button; 22. Secondary measurement button; 23. Up button; 24. Down button; 25. Export button; 26. Display screen; 27. Delete button; 28. Processor; 109. Input device; 100. Output device; 101. Memory; 102. Bus; 103. Computer program; 104. Detailed Implementation

[0028] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0030] Example 1 like Figure 1 As shown, this embodiment provides a method for measuring the arc shape of a gas cylinder end cap, including: A: The arc curve of the target gas cylinder head is obtained using measuring equipment, and the type of the target gas cylinder is determined based on the arc curve of the target gas cylinder head.

[0031] Specifically, such as Figure 2 As shown, the target gas cylinders include Type I, Type II, Type III, and Type IV gas cylinders. Type I cylinders are constructed of steel; Type II cylinders have a metal liner and a fiber-wound circumferential material structure; Type III cylinders have a metal liner and a fully wound material structure; and Type IV cylinders have a plastic liner and a fully wound material structure. Each type of gas cylinder has a different standard end cap arc curve.

[0032] The gas cylinder end cap arc measurement device described in Example 2 is used to measure and obtain multiple discrete and ordered two-dimensional coordinate points of the cross-section of the target gas cylinder end cap. All discrete points are connected in sequence to form a preliminary arc profile of the gas cylinder end cap. The preliminary arc profile of the gas cylinder end cap with the preliminary straight line connection is smoothed and optimized.

[0033] Since the gas cylinder head is an axisymmetric structure, it is only necessary to restore the cross-section of the target gas cylinder head and then convert it into a 3D model according to existing technology to fit the arc curve of the target gas cylinder head.

[0034] Meanwhile, during laser ranging, reflections and blemishes on the surface of the target gas cylinder cap may interfere with the laser measurement. To eliminate the error interference caused by these phenomena, these abnormal points that deviate from the normal arc shape are removed. Specifically, the mean of all y-coordinate values ​​is calculated. with standard deviation ; If any ordinate If the condition is not met, the point is considered an anomaly and is replaced. Let i be the value of any point on the ordinate, where i is a positive integer. According to... Replace the outlier. This represents the ordinate value of the replacement point for the corresponding outlier. Let x be the x-coordinate of any point.

[0035] When the type of the target gas cylinder is unclear, especially for Type III and Type IV wound gas cylinders which require full fiber winding, the end cap arc shape from the end to the cylinder body includes a gentle end section, a middle transition section, and a cylinder body connection section. Such an end cap arc shape is relatively complex, so an adaptive B-spline curve is used for fitting, and the resulting target gas cylinder end cap arc shape curve is output.

[0036] The adaptive B-spline curve expression is:

[0037] in, The control vertex used to characterize the end cap arc line determines the shape of the end cap arc line. These are k-order B-spline basis functions. Used to adjust the curves of adjacent segments. , Let k be the value of each node, U be the node vector, and k and m be positive integers.

[0038] By calculating all measurement points chord length between ,

[0039] The lengths of each chord are summed up. The total chord length S is S= .

[0040] Standardize the node vectors. Among them, the intermediate node This ensures that the node distribution is consistent with the measurement point density, and the end cap arc curve fits more accurately in dense point areas.

[0041] Make the adaptive B-spline curve C(U) as close as possible to the measurement point. That is, minimize Where j is a positive integer, Measurement point The corresponding parameter values ​​are determined by the cumulative chord length method.

[0042] Control Vertex The x-coordinate value is symmetrical about the point symmetrical about the y-coordinate, that is... At that time, the corresponding symmetrical vertex n is the total number of symmetrical points. It is the coordinate symmetric point on the horizontal axis of the end cap arc. It is a constant, and the constant corresponding to each coordinate point is different.

[0043] By constructing the node vectors mentioned above to match the density of measurement points, and adjusting the control vertices to adjust the connection relationship between adjacent curve segments, the fitted target gas cylinder end cap arc curve is verified to avoid excessive curvature leading to stress concentration.

[0044] Curvature formula: C'(u) is the first derivative of C(u). Constraints: curvature , , The minimum radius of curvature allowed by the material, such as the inner liner. Not less than 8mm. If the curvature of a certain node... Adjusting the control vertices near that node increases the spacing between them, reducing the curvature of that point to within the threshold. This forms the arc-shaped curve of the target gas cylinder head.

[0045] In summary, by acquiring discrete two-dimensional coordinate points of the cross-section of the target gas cylinder head using laser ranging, and through outlier removal (replacing points deviating from the normal arc shape based on the 3σ criterion) and adaptive B-spline curve fitting (matching the complex multi-curvature arc of type III / IV gas cylinders), the actual end-head arc curve is accurately restored and the gas cylinder type (type I-IV) is determined. This completely solves the problems of low accuracy (improved from over 0.5mm to 0.1mm level) of traditional measurement methods (such as right-angle ruler + depth gauge), susceptibility to reflection / stain interference, and reliance on experience for type judgment. It provides real and reliable geometric data support for all subsequent stages, avoiding chain errors such as fiber entanglement misalignment and improper clamp adaptation caused by distortion of basic data. Especially for type III / IV gas cylinders with end smooth sections and middle transition sections, it can completely capture the details of curvature changes, ensuring that subsequent designs fit the actual contour.

[0046] Secondly, the adaptive B-spline curve fitting technology in step A not only adapts to the type differences between Types I-IV, but also supports different specifications of gas cylinders within the same type (e.g., 50L / 100L capacity, 200mm / 300mm diameter): by adjusting the node vectors and control vertex parameters of the B-spline, arc curves for different specifications of gas cylinders can be quickly generated without redeveloping the fitting algorithm. For example, for Type IV vehicle-mounted hydrogen storage cylinders (35L capacity) and stationary hydrogen storage cylinders (100L capacity), only the measurement range of the lateral calipers and the sampling density of the laser rangefinder need to be adjusted to complete the arc acquisition, significantly reducing the development cost of measurement equipment for different specifications of gas cylinders and enhancing the potential for large-scale application of the technical solution.

[0047] Furthermore, dynamic node vector adaptation: Based on the "cumulative chord length method," the chord length between measurement points is calculated, and after accumulation, a standardized node vector is generated (intermediate nodes are positively correlated with the chord length), enabling dynamic matching between node distribution and measurement point density—dense nodes in complex arc transition sections and sparse nodes in smooth sections, avoiding a one-size-fits-all node allocation. Dynamic vertex symmetry control: Dynamically associating vertices with symmetrical vertices ensures the curve always conforms to the axial symmetry characteristics of the end cap, eliminating the need for manual adjustment of symmetry accuracy. Breaking through the limitations of fixed fitting models, the curve fitting parameters are dynamically adjusted according to the complexity of the arc, improving the accuracy of complex arc reconstruction of Type III / IV gas cylinders from the traditional 0.5mm to 0.1mm, providing a near-perfect 1:1 geometric benchmark for all subsequent stages.

[0048] Finally, a breakthrough was achieved by replacing the mechanical depth gauge with a laser rangefinder, utilizing non-contact replication and electronic interpolation technology. The "3σ criterion for outlier removal" replaced "visual judgment of dirt interference"—outliers were automatically removed by calculating the mean and standard deviation of the ordinate, and then replaced by linear interpolation to completely eliminate interference from reflections and dirt. The "capacitive grid array + high-frequency signal modulation" of the laser rangefinder replaced the "scale reading" of the mechanical gauge, improving the displacement measurement resolution to 0.1mm, and the non-contact design avoids scratching the end cap. Upgrading from direct mechanical contact to optical + electronic non-contact measurement not only solves the triple contradiction of "accuracy-scratching-interference" but also automates the measurement process.

[0049] like Figure 3 and Figure 4 As shown in Figure B: In the design of the winding fiber of the target gas cylinder, the number and position of the fiber yarn landing points are determined according to the arc curve of the target gas cylinder end cap and the corresponding type. The optimal fiber winding of the target gas cylinder is designed by the fiber yarn landing point.

[0050] Specifically, by accurately measuring the arc shape, it is possible to accurately calculate the position of the fiber yarn landing point, and then calculate the pressure-bearing capacity provided by the fiber in the axial direction. The better the pressure-bearing capacity, the better the quality of the gas cylinder.

[0051]

[0052] Where P represents the internal pressure that the gas cylinder withstands, and the unit is Pa. This indicates the radius of the cylinder, in mm. The strength provided by the helical winding of the fiber; The thickness of the spirally wound fiber; The spiral winding angle for each layer.

[0053]

[0054] Where P represents the internal pressure that the gas cylinder withstands, and the unit is Pa; This indicates the radius of the cylinder, in mm. The strength provided for circumferentially wound fibers; The thickness of the circumferentially wound fiber; The circumferential winding angle for each layer is approximately 90°.

[0055] , in, The compressive strength provided for the spiral winding of fibers; Let be the radius of each layer of the spiral winding.

[0056]

[0057] in, For the corresponding radius The individual winding fibers provide pressure resistance to the cylinder in the circumferential direction.

[0058] The compressive strength provided by the fiber layer under the helical and circumferential winding angles was calculated. The combined pressure-bearing capacity provided by different winding angles approximates the axial pressure-bearing capacity of the fiber on the gas cylinder, which is further used to evaluate whether the axial pressure-bearing capacity provided by the fiber meets the design requirements. After the theoretical calculations are completed, understanding the position of the fiber landing points is beneficial to improving the axial pressure-bearing capacity of the fiber winding on the gas cylinder during actual fiber winding. For circumferential winding, each layer of circumferential winding corresponds to one continuous turn of fiber, and the number of landing points is proportional to the circumference of the end cap. For helical winding, each layer of helical winding fiber must cover the entire arc-shaped area of ​​the end cap, and the number of landing points is positively correlated with the curvature distribution of the end cap's arc.

[0059] Different angles are used for spiral winding to avoid fiber accumulation at the end cap, which would also lead to redundant strength. To avoid this, different R radii (expanded hole winding) are used for spiral winding to avoid these problems.

[0060] In summary, step B, based on the arc curve and cylinder type of step A, uses a specific formula to quantitatively calculate the axial pressure-bearing capacity of different fiber landing points, accurately determining the number and position of fiber yarn landing points. This avoids the problems of fiber accumulation at the end caps (such as the enlarged hole design of spiral winding) and strength redundancy caused by the reliance on theoretical arc curves in traditional fiber winding. It can also adapt differentiated winding schemes for different types of cylinders (such as type II focusing on circumferential winding to enhance circumferential pressure bearing, and type III / IV full winding to balance axial and circumferential loads), significantly improving the pressure-bearing efficiency of the fiber layer and the structural strength of the cylinder, reducing fiber material waste, and achieving a high degree of consistency between design and winding process, thus reducing the defect rate.

[0061] Secondly, existing technologies lack guidance to match fiber placement with pressure requirements, resulting in fibers winding in a theoretical arc shape that cannot adapt to actual radius variations, leading to fiber accumulation and insufficient pressure resistance. However, by introducing a sequence of actual arc radius shapes and pressure-bearing formulas, the overall axial pressure resistance of the designed fibers is improved. C: When designing the clamps used to fix and support the target gas cylinder, the size and structure of the clamps are determined according to the arc curve of the target gas cylinder head.

[0062] Specifically, due to fluctuations in the position of the fiber end cap and the transition section of the cylinder body, drawing the arc curve of the target gas cylinder end cap helps to avoid the transition section position when designing the clamp position. If the clamp design is based on the gas cylinder outline on the drawing instead of the actual gas cylinder outline, the clamp position is likely to be designed close to the transition position of the cylinder body, which can easily lead to clamp slippage. This is especially true for gas cylinders with short cylinder lengths, where the clamp position is more likely to be designed close to the transition position of the cylinder body.

[0063] like Figure 5 As shown, the clamp used to securely support the gas cylinder functions primarily to achieve stable restraint through precise fitting with the curved end cap, preventing slippage, excessive vibration, or even structural damage during transportation (e.g., in vehicle-mounted scenarios), installation, or use. Existing clamp designs often employ a universal solution of "standard curved shape + fixed dimensions." This is because the clamp and gas cylinder are complementary products, manufactured simultaneously, and it's assumed that adhering to the standard curved end cap shape on the design drawings only introduces some degree of error. However, different batches of gas cylinders produced according to the standard curved end cap shape on the design drawings exhibit significant variations in error. Ignoring these differences in end cap curvature between batches can easily lead to problems such as "slippage in the transition section" and "localized stress concentration." Especially when the clamp's fitting area falls in the middle transition section of the end cap (where the rate of curvature change is large), the gas cylinder, after installation, is prone to sliding along the curved slope of the transition section due to vibrations or gravity generated by vehicle movement.

[0064] Table 1. Correspondence between the design of the end cap arc shape and the clamp structure.

[0065] As shown in Table 1, an arc segment is any line segment in an arc-shaped curve. According to the design requirements described in Table 1 and in combination with different types of gas cylinders, the hoop is manufactured using existing manufacturing methods.

[0066] Specifically, the clamp design for Type I gas cylinders (steel cylinders) involves the clamp fitting along the low-curvature section of the cylinder's end cap, with a curvature not exceeding 0.03. The clamp arc length accounts for 40%-50% of the arc length of the gas cylinder's end cap, and the central angle of the clamp is 144°-180°. For Type II gas cylinders, the clamp design ensures that the curvature of the section where the end cap's arc meets the clamp is gentle, with a curvature of not less than 0.05. No greater than 0.08 Furthermore, it avoids the seams of the circumferential winding layer. The clamp design for the Type III gas cylinder features a variable curvature fitting section on the curved fitting section of the cylinder's end cap; that is, the curvature of the first half of the clamp fitting section (near the end cap) is no greater than 0.05. The curvature of the rear half (near the cylinder body) is not less than 0.07. The clamp design for the Type IV gas cylinder is such that it fits the low-curvature section of the cylinder's end cap arc, with a clamp curvature not exceeding 0.04. Furthermore, the inner diameter compensation of the clamp should be no less than 0.45mm to prevent thermal deformation and creep of the plastic inner liner of the Type IV gas cylinder.

[0067] In summary, step C, based on the arc curve, customizes the clamp size and structure. By matching the low / medium curvature section of the end cap and avoiding easily slipping transition sections, it solves the problems of poor fit and local stress concentration caused by the "standard arc + fixed size" design of general-purpose clamps. It designs exclusive structures for different types of gas cylinders (such as Type I clamps covering 40%-50% of half the end cap circumference, and Type IV clamps with a thermal deformation compensation allowance of more than 0.45mm), ensuring a tight fit between the clamp and the end cap. Especially for gas cylinders with short cylinder lengths, it effectively avoids the risk of slippage caused by clamp position deviation and improves the fixation stability of gas cylinders in transportation and installation scenarios.

[0068] D: When designing a gas cylinder protective cover to protect the target gas cylinder, the size and structure of the gas cylinder protective cover are determined based on the arc curve of the target gas cylinder head.

[0069] Specifically, gas cylinder protective covers are used for the physical protection (anti-collision, anti-scratch) and environmental isolation (dustproof, corrosion-proof) of gas cylinders. Existing general-purpose protective covers often adopt a "standard hemispherical shape + fixed wall thickness" design, which does not match the actual arc shape of the gas cylinder end cap (such as the multi-curvature transition arc of Type III / IV gas cylinders, and the metal-fiber connection arc of Type II gas cylinders). This easily leads to problems such as "excessive gap in fit, causing wobbling," "localized excessive tightness compressing the fiber layer," and "lack of protection in the transition section." Especially for Type IV plastic-lined + fully wound gas cylinders, improper protective cover design may squeeze the fiber winding layer, damaging its pressure-bearing structure. However, using step A described in this embodiment, when designing the gas cylinder protective cover for different types of gas cylinders and their actual dimensions, the wall thickness of the protective cover corresponding to the gentle section at the end of the gas cylinder is designed to be 3-4mm, thus providing stronger resistance to vertical impacts. The wall thickness of the protective cover corresponding to the transition section in the middle of the gas cylinder is designed to be 2.5-3.5mm, thus balancing strength and lightweight design. The gas cylinder protective cover corresponds to the connecting section of the gas cylinder body. Its wall thickness is designed to be 2-3mm, mainly serving a connecting function, with low strength requirements.

[0070] In summary, step D combines the design of the gas cylinder protective cover with an arc curve, and customizes the wall thickness according to the segmented curvature of the end cap (3-4mm at the top to enhance impact resistance, 2.5-3.5mm in the middle transition section to balance strength and lightweight, and 2-3mm in the cylinder connection section to simplify the structure). It eliminates the defects of traditional standard hemispherical protective covers, such as large fitting gaps (easy to shake) and local excessive tightness (compressing the fiber layer). It can achieve all-round protection against dust, corrosion and collision, and can also protect the key structures of different types of gas cylinders (such as the heat deformation requirements of Type IV plastic liner and the integrity of Type III fiber layer), extend the service life of gas cylinders, and adapt to diverse usage scenarios such as vehicle-mounted and stationary types.

[0071] E: Obtain the actual arc curve of the target gas cylinder end cap and compare it with the standard arc curve of the target gas cylinder end cap to determine whether the target gas cylinder end cap needs repair or scrapping. If the actual arc curve of the target gas cylinder end cap is not within the error range of its standard arc curve, the target gas cylinder needs repair or scrapping; otherwise, the target gas cylinder can be used normally.

[0072] Table 2 Error values ​​of the arc curves of each sub-section of the target gas storage cylinder

[0073] Specifically, as shown in Table 2, if the error of any type of gas cylinder does not conform to Table 1 in at least two cases, the gas cylinder needs to be maintained. If the error of any type of gas cylinder does not conform to Table 1 in at least three cases, the gas cylinder needs to be scrapped.

[0074] In summary, Step E, through quantitative comparison of the actual arc curve with the standard arc curve (clarifying the error thresholds for Type I-IV gas cylinders in dimensions such as radial at the end, axial in the transition section, and radial at the cylinder connection section), replaces the traditional subjective experience-based judgment method. It accurately distinguishes the "usable - requires maintenance - requires scrapping" status of the gas cylinder end cap, avoiding safety hazards caused by unqualified gas cylinders entering the usage stage (such as stress concentration caused by arc deviation), and preventing cost waste caused by excessive scrapping of repairable gas cylinders. Moreover, the judgment process data is traceable, which meets the safety supervision requirements of special equipment, providing a scientific and implementable decision-making basis for the safety management of gas cylinders throughout their entire life cycle.

[0075] In this embodiment, steps ABCDE are not executed sequentially; they can be steps AB, steps AC, AD, AE, or other combinations thereof.

[0076] Beneficial effects of this embodiment First, a closed-loop technology system encompassing measurement, design, and judgment is constructed to address the disconnect between existing processes. In current gas cylinder technology, the measurement of the end cap arc (relying heavily on right-angle rulers and depth gauges), fiber winding design (relying on theoretical drawings), clamp / protective cover manufacturing (using standard parts), and condition judgment (visual experience) are all independent processes, easily leading to a chain reaction of problems: "distorted measurement data → design deviation → adaptation failure → safety hazards." Example 1 uses step A (arc curve and type acquisition) as the core data hub, tightly linking subsequent steps B (fiber winding), C (clamp design), D (protective cover design), and E (condition judgment): the "actual arc curve + gas cylinder type" data output from step A directly serves as the design benchmark for steps B, C, and D, and the "actual-standard curve comparison" in step E verifies the reliability of the data from step A, forming a closed loop of data-driven design and design feedback data. This closed-loop design completely breaks down the information barriers of traditional processes. For example, the fiber winding design of the Type III gas cylinder no longer relies on theoretical arcs, but is based on the multi-curvature transition segment data measured in step A, ensuring that the winding process is completely matched with the actual head contour. Gas cylinders that are deemed unqualified in step E can also be identified by tracing back the original measurement data of step A, pinpointing whether the problem is a production error or a deformation during use, providing direction for subsequent improvements and significantly enhancing the systematicness and reliability of the overall technical solution.

[0077] Secondly, the high-precision arc curve acquisition technology is adaptable to complex gas cylinder types and scenarios. By using the 3σ criterion (calculating the mean and standard deviation of the ordinate and eliminating outliers), interference from reflections and blemishes during laser ranging is effectively avoided, ensuring the authenticity of discrete coordinate points. Furthermore, linear interpolation formulas are used to replace outliers, preventing curve breaks caused by missing data. Measurement accuracy can be stably controlled at the 0.1mm level, meeting the high-precision requirements of Type IV plastic-lined + fully wound gas cylinders. Complex arc adaptability: For the complex multi-curvature arc shape of Type III / IV gas cylinders ("end smooth section + middle transition section + cylinder body connection section"), adaptive B-spline curve fitting is adopted—the node vector U is constructed by accumulating chord lengths, ensuring that the node distribution is consistent with the measurement point density, and controlling the vertex P. i Regarding the symmetry axis of the end cap, the final fitted curve not only has no abrupt inflection points, but can also completely restore the curvature change details of the transition section. This solves the problem that the traditional "single circular arc fitting" cannot adapt to complex arcs, and provides a reliable geometric basis for subsequent high-precision applications (such as fiber landing point calculation and protective cover bonding).

[0078] Next, precise cylinder type determination provides a clear basis for customized design. Example 1 accurately distinguishes between Type I-IV gas cylinders (Type I: pure steel; Type II: metal liner + circumferential winding; Type III: metal liner + full winding; Type IV: plastic liner + full winding) by matching the actual arc curve with the standard curve in step A. Compared to the traditional subjective method of visual observation and material testing, the accuracy rate is improved to 100%. The standard arc curves of different types of cylinders differ significantly (e.g., Type I is a hemispherical single curvature, while Type IV has a multi-curvature transition). Step A compares the key features of the actual curve (e.g., the minimum radius R at the top). min The initial curvature k of the transition section s , cylinder body connection radius R nax This allows for direct identification of the gas cylinder type. The type determination provides clear constraints for subsequent customized design steps: for example, in step B, Type II cylinders only need optimization of the circumferential winding landing point (no helical winding required), while Type IV cylinders require careful consideration of the thermal deformation of the plastic liner and allowance for gap compensation at the fiber landing point; in step C, Type I cylinder clamps can be made of high-rigidity steel (to suit their heavy weight), while Type IV requires elastic materials (to accommodate the creep of the plastic liner). This precise "type-design" matching avoids the inadequacy of traditional "universal design" (such as slippage caused by using Type I clamps on Type IV cylinders), significantly improving the design effectiveness of each stage.

[0079] Finally, this provides methodological support for subsequent hardware and systems, forming a complete technical system. The method design in Example 1 provides a clear technical basis for Example 2 (measuring equipment) and Example 3 (measuring system). The measuring equipment hardware in Example 2 is designed specifically to achieve the arc acquisition in step A (e.g., the 90° positioning of the right-angle caliper matches the axisymmetric curve requirement of step A, and the 0.1mm accuracy of the laser rangefinder matches the measurement requirements of step A). ​​The core of the measuring system in Example 3 is to execute the method logic of Example 1 (e.g., the pressure calculation in step B and the curve comparison in step E), ensuring that the method is transformed from theory into an executable automated process. This collaboration between method, equipment, and system forms a complete technical system, avoiding the disconnect between "methods that cannot be implemented and equipment that lacks methodological support," thus laying the foundation for industrial application.

[0080] Example 2 like Figure 6As shown, unlike the previous embodiments, this embodiment provides a measuring device for the arc shape of the end cap of a gas cylinder 4, including: a right-angle caliper 1, a laser rangefinder 3, a transmission component 21, and a measurement data processing component 2. The right-angle caliper 1 is used to fit snugly against the target gas cylinder 4 to provide precise positioning for the laser rangefinder 3. The laser rangefinder 3 is used to measure the arc curve of the target gas cylinder 4. The measurement data processing component 2 is used to process real-time measurement data, and the transmission component 21 is used to send the measurement data to a terminal database.

[0081] The right-angle caliper 1 includes a horizontal caliper 11 and a vertical caliper 12, which are fixedly connected at a 90° angle. Both the horizontal caliper 11 and the vertical caliper 12 are marked with numerical graduations.

[0082] A laser rangefinder 3 and a data processing component 2 are fixedly mounted on a horizontal caliper 11. The laser rangefinder 3 is close to the data processing component 2, and the data processing component 2 and the laser rangefinder 3 are electrically connected. The measurement data processing component 2 is electrically connected to the transmission component 21, and the transmission component 21 is fixedly mounted on the measurement data processing component 2.

[0083] Specifically, such as Figure 7 As shown, the measurement data processing component 2 includes a housing, a display screen 30, a start measurement button 22, a power on / off button, a measurement accuracy adjustment button 24, a data clear button 25, a secondary measurement button 26, an up button 27, a down button 28, an export button 29, and a delete button 31. The display screen 30, start measurement button 22, power on / off button, measurement accuracy adjustment button 24, data clear button 25, secondary measurement button 26, up button 27, down button 28, export button 29, and delete button 31 are respectively installed on the housing. The display screen 30 is used to display measurement data. The start measurement button 22 is used to execute the measurement of the target gas cylinder 4. The power on / off button is used to turn the measurement data processing component 2 on or off. The measurement accuracy adjustment button 24 is used to adjust the measurement recording accuracy, with adjustments available in accuracies of 0.1mm, 1mm, 2mm, 5mm, and 10mm. The data clear button 25 is used to clear the data of the current gas cylinder 4 before executing data recording for the next target gas cylinder 4. The secondary measurement key 26 is used to end the measurement after the gas cylinder 4 is measured, and to save the data of the gas cylinder 4 by pressing it once and then pressing it a second time. The up key 27 and the down key 28 are used to move and select measurement data. The export key 29 is used to transmit the measurement data to the terminal database through the transmission component 21. In this embodiment, the start measurement key 22, the power on / off key, the measurement accuracy adjustment key 24, the data clear key 25, the secondary measurement key 26, the up key 27, the down key 28, the export key 29, and the delete key 31 are all in button form.

[0084] In summary, this system can quickly obtain the coordinate parameters of the outer contour of the four end caps of a gas cylinder, and can convert them into parametric coordinates based on the inner liner or outer diameter of the cylinder. These coordinates can be imported into drawing software in .dwg or .xlsx (EXCEL) file format for drawing the end cap arc. This provides designers with an accurate physical model, which is beneficial for observing the consistent performance of the product.

[0085] The usage principle of this embodiment Reading Principle: The laser rangefinder 3 utilizes a precision-etched capacitance grid array on its moving and fixed grids to generate periodically changing capacitance during relative movement. The circuit detects the high-frequency signal modulation caused by this capacitance change and converts it into a high-resolution displacement measurement value using electronic interpolation technology. Distance Measurement Method: Laser rangefinder 3 is used. Laser ranging is performed simultaneously with the movement of the arc-shaped measuring device on the sliding gas cylinder 4's end cap.

[0086] like Figure 8 As shown, before measurement, place the right-angle caliper 1 on the target gas cylinder 4 or its inner liner. During measurement, first press the power on / off button to turn on the device. The starting position of the horizontal caliper 11 of the arc-shaped measuring device on the gas cylinder 4 end is the left-end zero mark. Then press the zeroing button. The display screen 30 will show the data as zeroed, and the laser rangefinder 3 will be calibrated. Adjust and select the target accuracy. The display screen 30 will show the corresponding accuracy (e.g., 0.1mm, 1mm, 2mm, 5mm, and 10mm).

[0087] Before using the sliding measurement recording device, press the start button to prepare for recording the data measured by the laser rangefinder 3 and the sliding position. When the measurement is finished, press the end button, then press it again to automatically save the data. The file name is A1, the second measurement is named A2, and so on. Data is transmitted via the wireless transmission component 21, and the measurement recording device automatically stores it in the terminal database.

[0088] Beneficial effects of this embodiment First, ensuring measurement accuracy and adapting to complex curved scenarios. Firstly, the right-angle caliper 1 offers superior positioning accuracy. The right-angle caliper 1 consists of a horizontal caliper 11 and a vertical caliper 12, forming a fixed 90° angle, both marked with numerical graduations. During measurement, it can closely conform to the surface of the target gas cylinder 4 or its inner liner, providing precise positioning at the "reference coordinate system" level for the laser ranging device 3. The zero-scale starting position of the horizontal caliper 11 can be reset via the "data zeroing key 25," ensuring that the origin of the horizontal coordinate (x-axis) is consistent for each measurement. The vertical caliper 12 assists in calibrating the longitudinal (y-axis) direction of the laser ranging, avoiding coordinate deviations caused by positioning offsets. This structure is particularly crucial for measuring the multi-curvature transition arcs of the III / IV type gas cylinder 4, ensuring that the acquisition of discrete coordinate points always conforms to the axisymmetric contour of the end cap, laying the foundation for the accuracy of subsequent curve fitting. Secondly, the high-resolution measurement advantage of the laser rangefinder 3: Based on the working principle of a "capacitive grid array of moving and fixed grids," the laser rangefinder 3, through circuit detection of capacitance changes and electronic interpolation technology, can improve the resolution of displacement measurement values ​​to the 0.1mm level (matching the highest precision of the measurement accuracy adjustment key 24), far exceeding existing depth gauges (typically with an accuracy ≥0.5mm). Simultaneously, the laser rangefinder 3 is directly electrically connected to the measurement data processing component 2, enabling real-time synchronous acquisition of lateral displacement and longitudinal distance data during sliding measurements. This avoids the lag and errors of manual readings, ensuring a one-to-one correspondence for each discrete coordinate point (x,y), and effectively avoiding interference from reflections and minor stains (in conjunction with the abnormal data deletion function of the data processing component 2).

[0089] Secondly, it achieves integrated measurement-processing-storage, improving operational efficiency. Firstly, the convenient operation advantages of the multi-function buttons and display screen 30: The measurement data processing component 2 integrates 10 function buttons, including power on / off, start measurement, accuracy adjustment, data zeroing, secondary measurement, and export. Combined with real-time data feedback from the display screen 30, it achieves highly efficient operation with "paperless recording throughout the entire process." Before measurement: The "Measurement Accuracy Adjustment Key 24" allows selection of accuracy levels such as 0.1mm (suitable for high-precision requirements of Type IV plastic liners), 1mm / 2mm (suitable for Type II / III metal liners), and 5mm / 10mm (suitable for rapid detection of Type I steel cylinders). The display screen 30 shows the current accuracy in real time, requiring no additional calibration tools. During measurement: The "Start Measurement" key 22 triggers data acquisition. The display screen 30 synchronously refreshes coordinate data as the device is moved, preventing omissions during manual recording. After measurement: The "Secondary Measurement" key 26 enables automated data saving from the initial measurement to the next measurement object. Files are automatically named sequentially as "A1, A2…", eliminating the need for manual labeling. The "Data Clear" key 25 quickly clears the current data, ensuring no data residue interference when switching to the next measurement object.

[0090] Next, the data reliability assurance component's delete key 31 allows manual removal of abnormal measurement data (such as jump values ​​caused by laser reflection). The secondary measurement function supports repeated measurements and data comparisons of the same gas cylinder. If the deviation of key coordinate points (such as the top vertex or cylinder connection point) between two measurements is ≤0.2mm, the data can be confirmed as valid, further reducing the random error of a single measurement. Simultaneously, data is still saved locally after the equipment is powered off and can be re-exported via the export key 29 upon the next power-on, avoiding data loss due to power outages and ensuring the continuity and traceability of measurement data. This design significantly shortens the measurement time for a single gas cylinder and greatly improves the efficiency of batch measurements.

[0091] Meanwhile, data transmission and output: connecting subsequent design stages and improving data utilization. The real-time storage advantage of transmission component 21: Transmission component 21 (fixed to measurement data processing component 2) can wirelessly send measurement data to the terminal database, achieving seamless connection from measurement to storage, avoiding the tediousness and errors of manual data copying. The terminal database can classify and manage measurement data from multiple batches and types of gas cylinders 4, providing data support for subsequent consistency analysis of products in the same batch (such as comparing the end cap arc deviation of Type I steel cylinders to determine the stability of the production process). Design adaptation advantage of multi-format data export: The device supports exporting measurement data in .dwg (CAD format) or .xlsx (Excel format). .dwg format can be directly imported into drawing software such as AutoCAD. Designers do not need to manually draw the end cap arc; they can generate a 3D model based on the actual measurement curve, providing a "1:1" actual contour basis for fiber winding program compilation and clamp / protective cover mold design. The .xlsx format makes it easier for the data analysis module (such as the system in Example 3) to read coordinate data and automatically perform operations such as outlier removal, adaptive B-spline curve fitting, and comparison with standard curves, without the need for manual secondary data entry, thus reducing design errors in subsequent stages.

[0092] Finally, scenario adaptability: covering all types of gas cylinders 4, meeting diverse measurement needs. The device's structural design and adjustable precision allow it to adapt to all types of gas cylinders 4, from type I to IV. For type I pure steel cylinders, 1-2mm precision can be selected for rapid measurement; for type II metal-lined + circumferentially wound cylinders, 0.1mm precision can be used to focus on the transition arc; for type III / IV fully wound cylinders, the close fit between the high-resolution laser rangefinder and the right-angle caliper 1 accurately captures the curvature changes of the end cap's smooth section and the middle transition section, providing detailed data for fiber placement calculations. The laser rangefinder 3 is resistant to slight vibration interference and can work stably in various conditions such as factory production lines and vehicle-mounted gas cylinder testing sites; simultaneously, the "close-fitting" positioning of the right-angle caliper 1 eliminates the need for complex fixing fixtures, allowing for rapid adaptation to gas cylinders 4 of different sizes (e.g., diameter 50-500mm), reducing environmental limitations for on-site measurements.

[0093] Example 3 Unlike the previous embodiments, this embodiment provides a gas cylinder end cap arc measurement system 100, such as... Figure 9 As shown, a method for measuring the arc shape of a gas cylinder end cap includes a data analysis module, which includes an electronic device. The electronic device includes a memory, a processor 101, and a computer program 1041 stored in the memory and executable on the processor. When the processor 101 executes the computer program, it enables the electronic device to implement a method for measuring the arc shape of a gas cylinder end cap according to any of the above embodiments.

[0094] Specifically, such as Figure 10 As shown, the electronic device may include: one or more processors 101, one or more input devices 102, one or more output devices 103, one or more memories 104, and a computer program stored in the memory 104 and executable on the processor. The processor 101, input devices 102, output devices 103, and memory 104 are interconnected via a bus 105. The memory 104 stores the computer program 1041, which includes program instructions. The processor 101 is configured to invoke the program instructions to execute the method steps described in the above method embodiments.

[0095] It should be understood that, in this embodiment, the processor 101 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0096] Input device 102 may include a keyboard, etc., and output device 103 may include a display (LCD, etc.), a speaker, etc.

[0097] The memory 104 may include read-only memory and random access memory, and provides instructions and data to the processor 101. A portion of the memory 104 may also include non-volatile random access memory. For example, the memory 104 may also store device type information.

[0098] In specific implementations, the processor 101, input device 102, and output device 103 described in the embodiments of the present invention can execute the implementation methods described in the relevant embodiments of the gas cylinder end cap arc measurement system, measurement device, and measurement method provided in the embodiments of the present invention, which will not be repeated here.

[0099] It should be noted that for a more detailed description of the electronic device's workflow and the method for measuring the arc shape of a gas cylinder end cap, please refer to the aforementioned method implementation section, which will not be repeated here.

[0100] Example 4 Unlike the previous embodiments, the memory described in this embodiment should be interpreted broadly. It can be not only a hardware component in a computer system used for temporary data storage, but also a physical medium capable of storing digital information and being read by a computer. These media can be permanent or temporary, including but not limited to hard disks and solid-state drives.

[0101] Specifically, the memory can be an internal storage unit of the electronic device described in any of the embodiments, such as a system hard drive or memory. The memory can also be an external storage device of the system, such as a plug-in hard drive, SmartMediaCard (SMC), Secure Digital (SD) card, FlashCard, etc., equipped on the system. Furthermore, the memory can include both internal storage units and external storage devices. The memory is used to store the computer program and other programs and data required by the system. The memory can also be used to temporarily store data that has been output or will be output.

[0102] Storage devices include: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0103] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, references to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., mean that a specific feature, method, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this specification.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A method for measuring the arc shape of a gas cylinder end cap, characterized in that, include: A: Obtain the arc curve of the target gas cylinder head and the type of the target gas cylinder; B: In the design of the winding fiber of the target gas cylinder, the number and position of the fiber yarn landing points are determined according to the arc curve of the target gas cylinder end cap and the corresponding type. The optimal fiber winding of the target gas cylinder is designed by the fiber yarn landing points.

2. The method for measuring the arc shape of the gas cylinder end cap according to claim 1, characterized in that, It also includes C: In the design of the clamps used to fix and support the target gas cylinder, the size and structure of the clamps are determined according to the arc curve of the target gas cylinder head.

3. The method for measuring the arc shape of the gas cylinder end cap according to claim 1, characterized in that, It also includes D: In designing the gas cylinder protective cover for protecting the target gas cylinder, the size and structure of the gas cylinder protective cover are determined according to the arc curve of the target gas cylinder head.

4. The method for measuring the arc shape of the gas cylinder end cap according to claim 1, characterized in that, It also includes E: obtaining the actual arc curve of the target gas cylinder end cap and comparing it with the standard arc curve of the target gas cylinder end cap to determine whether the target gas cylinder end cap needs to be repaired or scrapped; If the actual arc curve of the target gas cylinder end cap is not within the error range of its standard arc curve, the target gas cylinder needs to be repaired or scrapped; otherwise, the target gas cylinder can be used normally.

5. The method for measuring the arc shape of the gas cylinder end cap according to claim 1, characterized in that, By using laser ranging, multiple discrete and ordered two-dimensional coordinate points of the actual cross-section of the target gas cylinder head are obtained. All discrete points are connected in sequence to form a preliminary arc-shaped profile of the gas cylinder head. The preliminary arc-shaped profile of the gas cylinder head with the initial straight line connection is smoothed and optimized to generate the arc curve of the target gas cylinder head.

6. The method for measuring the arc shape of the gas cylinder end cap according to claim 1, characterized in that, The target gas cylinders include Type I, Type II, Type III, and Type IV gas cylinders; among them, Type I gas cylinders are made of steel cylinder material, Type II gas cylinders are made of metal inner liner and fiber circumferential wound material, Type III gas cylinders are made of metal inner liner and fully wound material, and Type IV gas cylinders are made of plastic inner liner and fully wound material.

7. The method for measuring the arc shape of the gas cylinder end cap according to claim 1, characterized in that, In step B, the axial bearing capacity provided by different fiber landing points is calculated using the following formula, and the target fiber landing point is selected based on the strength of the bearing capacity; the formula includes... Where: P represents the internal pressure that the gas cylinder withstands, and the unit is Pa; This indicates the radius of the cylinder, in mm. The strength provided by the helical winding of the fiber; The thickness of the spirally wound fiber; The spiral winding angle for each layer; The strength provided for circumferentially wound fibers; The thickness of the circumferentially wound fiber; For each layer of circumferential winding angle; The compressive strength provided for the spiral winding of fibers; The radius of each layer of the spiral winding; For the corresponding radius The individual winding fibers provide pressure resistance to the cylinder in the circumferential direction.

8. A gas cylinder end cap arc-shaped measuring device, characterized in that, Multiple discrete two-dimensional points are used to measure the arc curve of the target gas cylinder end cap and send them to the terminal database to realize any one of the gas cylinder end cap arc measurement methods of claims 1-7; the gas cylinder end cap arc measurement device includes: right angle calipers, laser rangefinder, transmission component and measurement data processing component; Right-angle calipers are used to fit snugly against the target gas cylinder to provide precise positioning for the laser rangefinder. The laser rangefinder is used to measure the arc curve of the target gas cylinder. The measurement data processing component is used to process real-time measurement data. The transmission component is used to send the measurement data to the terminal database. A laser rangefinder and a measurement data processing component are fixedly installed on the right-angle caliper. The laser rangefinder is placed close to the measurement data processing unit and electrically connected to it; The transmission components are fixedly mounted on the measurement data processing components and are electrically connected to each other.

9. The gas cylinder end cap arc measuring device according to claim 8, characterized in that, The measurement data processing component includes a housing, a display screen, a start measurement button, a power on / off button, a measurement accuracy adjustment button, a data zeroing button, a secondary measurement button, an up button, a down button, an export button, and a delete button. The housing is fixedly mounted on a right-angle caliper, and the housing itself is equipped with the same four buttons. The casing is equipped with a display screen, a start measurement button, a power on / off button, a measurement accuracy adjustment button, a data clear button, a secondary measurement button, an up button, a down button, an export button, and a delete button.

10. A gas cylinder end cap arc-shaped measuring system, characterized in that, The device includes a data analysis module, which includes an electronic device. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it enables the electronic device to implement any one of the gas cylinder end cap arc measurement methods according to claims 1-7. The memory is used to store multiple discrete two-dimensional points of the target gas cylinder end cap arc curve measured by any one of the gas cylinder end cap arc measurement devices according to claims 8-9.

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