Composite pressure vessel with strain sensor and manufacturing method thereof

Abstract

A method for manufacturing a composite pressure vessel is disclosed. The method includes the steps of: preparing a liner having an inlet; and winding at least one composite filament on the liner to form an inner shell, the step of forming the inner shell may include winding a plurality of enameled wire strain sensors, each of which is manufactured in the form of a filament, on the liner at a different starting position from which the sensors begin to be wound on the liner, simultaneously with the composite filament. A composite pressure vessel manufactured by the method is further manufactured.

Description

[Technical field]

[0001] The present invention relates to a composite pressure vessel equipped with a strain sensor and a manufacturing method thereof, and more particularly to a composite pressure vessel equipped with a strain sensor for diagnosing defects and predicting the remaining life of the composite pressure vessel and a manufacturing method thereof. [Background technology]

[0002] Due to climate change caused by environmental pollution, there is an increasing interest in environmentally friendly energy sources. In particular, transportation vehicles such as cars, buses, trucks, ships, trains, and airplanes are using electricity and hydrogen as energy sources to replace the existing fossil fuels.

[0003] If the hydrogen storage device used in hydrogen cars and hydrogen trains is damaged, it could cause a major accident, so the hydrogen storage device must be able to withstand high pressures of approximately 700 bar and maintain its durability even after more than 20,000 refills.Even in hydrogen storage devices with guaranteed durability, defects can occur due to use or external impacts, so a Structural Health Monitoring (SHM) system for hydrogen storage devices must be introduced.

[0004] For structural health monitoring, it is necessary to select appropriate physical values ​​that indicate structural health and measure them accurately. To do so, it is necessary to research the installation positions and installation methods of sensors that can accurately measure physical values.

[0005] Strain is one of the physical values ​​that indicate structural integrity. Conventional resistance-type strain sensors could only measure strain in the local area where the strain sensor was attached. Therefore, in order to monitor the condition of a wide area, multiple strain sensors had to be attached, which increased the number of channels and increased costs, making it difficult to commercialize.

[0006] The matters described in this Background Art are prepared to promote understanding of the background of the invention, and may include matters that are not conventional art already known to those having ordinary skill in the art to which this technology pertains. Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENTS An embodiment of the present invention aims to provide a composite pressure vessel equipped with a sensor, in particular a strain sensor, for monitoring the structural integrity status of the composite pressure vessel.

[0008] Another embodiment of the present invention aims to provide a method for manufacturing a composite pressure vessel equipped with a strain sensor. [Means for solving the problem]

[0009] A method for manufacturing a composite pressure vessel according to an embodiment of the present invention includes the steps of preparing a liner having an inlet; and winding at least one composite filament onto the liner to form an inner shell, wherein the step of forming the inner shell may involve winding a plurality of enameled wire strain sensors, each manufactured in filament form, simultaneously onto the liner together with the composite filament, with each enameled wire strain sensor having a different starting position for winding onto the liner.

[0010] In one aspect, the plurality of enameled wire strain sensors may be wound evenly across the entire area of ​​the composite pressure vessel.

[0011] In another aspect, the plurality of enameled wire strain sensors may be wound with locally different concentrations on the composite pressure vessel.

[0012] In another aspect, a portion of the plurality of enameled wire strain sensors may be wound evenly across the entire area of ​​the composite pressure vessel, and another portion of the plurality of enameled wire strain sensors may be wound with different concentrations locally on the composite pressure vessel.

[0013] The method may further include forming an outer shell over the inner shell.

[0014] The method may further include attaching a dome made of foam plastic to at least one of the ends of the exterior shell.

[0015] The composite filaments may include one or more of carbon fiber, glass fiber, and aramid fiber, and a resin.

[0016] A composite pressure vessel according to another embodiment of the present invention may be manufactured by a method for manufacturing a composite pressure vessel according to an embodiment of the present invention.

[0017] The inlet portion may include a sensor module mounted therein and communicatively coupled to a strain sensor.

[0018] The sensor module may include an internal pressure sensor for measuring an internal pressure of the composite pressure vessel; an external temperature sensor for measuring an external temperature; and a printed circuit board electrically connected to the strain sensor, the internal pressure sensor, and the external temperature sensor.

[0019] The sensor module may further include a communication connector adapted to transmit signals measured by or generated by the sensor module.

[0020] The sensor module may further include an internal temperature sensor that measures an internal temperature of the composite pressure vessel and is electrically connected to the printed circuit board. Effect of the Invention

[0021] According to the present invention, when manufacturing a pressure vessel by winding a filament around a liner, a strain sensor is formed from a filament-shaped enameled wire and wound together with the filament, which makes it easy to manufacture a composite material pressure vessel equipped with a strain sensor and enables accurate detection of the overall condition of the pressure vessel.

[0022] In addition, by winding multiple filament-shaped strain sensors around the composite pressure vessel, it is possible to prepare for damage to some of the strain sensors that may occur during the manufacturing process of the composite pressure vessel, and to ensure measurement stability.

[0023] In addition, when multiple filament-type strain sensors are wound around a composite pressure vessel, different strain sensors can be wound at different concentrations relative to major portions of the composite pressure vessel, thereby identifying the portions of the composite pressure vessel where damage has occurred.

[0024] In addition, by attaching a sensor module including a printed circuit board to the pressure vessel, the structural health status of the pressure vessel can be monitored by itself using the measurement values ​​of the strain sensor and the sensor module, or the measurement values ​​of the strain sensor and the sensor module can be sent to an external device via a communication connector to allow the external device to monitor the structural health status of the pressure vessel.

[0025] Other advantages achieved or expected by the embodiments of the present invention are directly or implicitly disclosed in the detailed description of the embodiments of the present invention, i.e., various advantages expected by the embodiments of the present invention are disclosed in the detailed description below. [Brief description of the drawings]

[0026] The embodiments herein can be better understood by reference to the following description in conjunction with the accompanying drawings, in which like reference numbers indicate identical or functionally similar elements and in which:

[0027] [Figure 1] 1 is a schematic perspective view of a composite pressure vessel according to an embodiment of the present invention; FIG. [Diagram 2] FIG. 2 is a schematic cross-sectional view of another composite pressure vessel according to an embodiment of the present invention. [Diagram 3] 1 is a flow chart that generally illustrates a method for manufacturing a composite pressure vessel in accordance with an embodiment of the present invention.

[0028] The above-referenced drawings are not necessarily drawn to scale and should be understood as illustrating somewhat simplified representations of various preferred features illustrating the underlying principles of the present disclosure. Specific design features of the present disclosure, including, for example, specific dimensions, orientations, locations, and shapes, are determined in part by the particular intended application and environment of use. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The terms used herein are for the purpose of describing particular embodiments and are not intended to limit the disclosure. As used herein, the singular form is intended to include the plural form unless the context clearly dictates otherwise. It is also understood that, as used herein, the terms "comprises" and / or "comprising" specify the presence of the mentioned features, integers, steps, operations, components, and / or components, but do not exclude the presence or addition of one or more of other features, integers, steps, operations, components, components, and / or groups thereof. As used herein, the term "and / or" includes any one or all combinations of the associated listed items.

[0030] As used herein, terms such as "vehicle" or "vehicle," or other similar terms, are understood to include passenger automobiles, including sports utility vehicles (SUVs), buses, trucks, various commercial vehicles, marine vehicles, including various boats and ships, rail vehicles, aircraft, drones, and the like.

[0031] As used herein, the term "pressure vessel" refers to a vessel capable of temporarily storing therein gas or liquid fuels, including hydrogen, and liquids, including liquefied fuels. The pressure vessel includes an inlet through which the pressure vessel can be filled with gas or liquid, or through which the gas or liquid within the pressure vessel can be discharged to the outside.

[0032] It is further understood that the following methods or one or more of these aspects can be performed by at least one or more control units (e.g., electronic control units (ECUs), etc.), controllers, or control servers. The terms "control unit," "controller," or "control server" can refer to a hardware device including a memory and a processor. The memory is configured to store program instructions, and the processor is specifically programmed to execute the program instructions to execute the one or more processors, as described below. The control unit, controller, or control server can control the operation of a unit, module, component, device, or the like, as described herein. It is further understood that the following methods can be performed by an apparatus including a control unit or controller, along with one or more other components, as will be appreciated by those skilled in the art.

[0033] Furthermore, the control unit, controller, or control server of the present disclosure may be embodied as a non-transitory computer-readable recording medium containing executable program instructions executed by a processor. Examples of computer-readable recording media include, but are not limited to, ROM, RAM, compact disk (CD) ROM, magnetic tape, floppy disk, flash drive, smart card, and optical data storage device. The computer-readable recording media may also be distributed across a computer network such that the program instructions are stored and executed in a distributed manner, such as a telematics server or a Controller Area Network (CAN).

[0034] The composite pressure vessel according to the embodiment of the present invention is easy to manufacture and can accurately detect the overall condition of the pressure vessel by forming a strain sensor with a filament-shaped enameled wire and winding it together with the filament when manufacturing the pressure vessel by winding a filament around a liner. In addition, by winding a plurality of filament-shaped strain sensors around the composite pressure vessel, it is possible to prepare for damage to some of the strain sensors that may occur during the manufacturing process of the composite pressure vessel, and to ensure the stability of measurement. In addition, when winding a plurality of filament-shaped strain sensors around the composite pressure vessel, different strain sensors are wound with different concentrations with respect to a main part of the composite pressure vessel, so that a part where damage has occurred in the composite pressure vessel can be identified. In addition, by mounting a sensor module including a printed circuit board on the pressure vessel, the pressure vessel can perform structural health monitoring of the pressure vessel itself using the measurement values ​​of the strain sensors and the measurement values ​​of the sensor module, or the structural health monitoring of the pressure vessel can be performed by an external device by transmitting the measurement values ​​of the strain sensors and the measurement values ​​of the sensor module to an external device via a communication connector.

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0036] FIG. 1 is a schematic perspective view of a composite pressure vessel according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of another composite pressure vessel according to an embodiment of the present invention.

[0037] As shown in FIG. 1 and FIG. 2, the composite pressure vessel 1 according to the embodiment of the present invention is formed in a hollow shape so that hydrogen, liquid fuel, or liquefied fuel can be temporarily stored therein. The composite pressure vessel 1 is not limited thereto, and has a cylindrical shape, and one end of the composite pressure vessel 1 is provided with an inlet portion 6 to be fluidly connected to the outside, and the other end of the composite pressure vessel 1 is closed. For this reason, the composite pressure vessel 1 can be filled with gas or liquid through the inlet portion 6, or the gas or liquid stored therein can be supplied to a necessary part. For this reason, the inlet portion 6 can be provided with a valve (not shown). For convenience of explanation, the composite pressure vessel 1 is exemplified in this specification as a hydrogen pressure vessel for a hydrogen vehicle (such as a car, bus, truck, ship, rail vehicle, aircraft, drone, etc. that uses hydrogen as a power source), but may be a gas or liquid pressure vessel for other purposes.

[0038] The composite pressure vessel 1 includes a body 2 and an inlet section 6 .

[0039] The body 2 is formed in a cylindrical shape and can include a liner 30 , an inner shell 40 , and an outer shell 50 .

[0040] The liner 30 is formed in a hollow shape corresponding to the body 2. One end of the liner 30 is coupled to the inlet 6, and the other end of the liner 30 is closed. The liner 30 may be made of various materials, but in this embodiment of the present invention, the liner 30 may be made of a polymer such as plastic.

[0041] The inner shell 40 entirely encloses the liner 30 to which the inlet 6 is coupled. The inner shell 40 is formed by winding at least one composite filament 42, 44, 46 on the outer surface of the liner 30 in at least one layer. The composite filaments 42, 44, 46 may be formed by impregnating carbon fiber, glass fiber, aramid fiber, etc. with a resin such as an acrylic resin, a polyester resin, an isocyanate resin, or an epoxy resin. The inner shell 40 also includes at least one strain sensor 20. The strain sensor 20 is made of an enameled wire and formed into a filament having a shape similar to that of the composite filaments 42, 44, 46, and may be wound around the liner 30 together with the composite filaments 42, 44, 46. That is, when the composite filaments 42, 44, 46 are wound around the liner 30 to form the inner shell 40, the strain sensor 20 is wound around the liner 30 together with the composite filaments 42, 44, 46 to form the inner shell 40. As a result, when the composite pressure vessel 1 is manufactured by winding the composite filaments 42, 44, 46 around the liner 30, the strain sensor 20 can also be attached to the composite pressure vessel 1. This makes it easy to attach the strain sensor 20 for monitoring the structural integrity of the composite pressure vessel 1.

[0042] The initial resistance of currently used strain sensors is about 120Ω, and when the strain sensor is deformed under load, the resistance value increases. The strain sensor measures the amount of deformation by measuring the change in resistance value. Therefore, if the enameled wire strain sensor 20 is manufactured to have an initial resistance value of about 120Ω, it is possible to measure the amount of deformation of the composite material pressure vessel 1 using an existing measuring device. In other words, the initial resistance value of the enameled wire strain sensor 20 satisfies the following formula: r*L=120 Here, r is the resistance per unit length of the enameled wire, and L is the length of the enameled wire.

[0043] For example, since an enameled wire with a diameter of 0.1 mm has a resistance of about 2 Ω per meter, if a strain sensor 20 is constructed by winding about 60 m of enameled wire around a liner 30, the deformation of the composite material pressure vessel 1 can be measured using an existing measuring instrument, and the measuring instrument can be easily calibrated.

[0044] The enameled wire strain sensor 20 is wound around a liner 30 and has both ends extending into the inlet portion 6 .

[0045] Meanwhile, when a thin and long enameled wire strain sensor 20 is wound around the liner 30, defects may occur in the enameled wire. To prevent such defects, a plurality of enameled wire strain sensors 20 can be wound around the liner 30. In this case, the start position where one enameled wire strain sensor 20 starts to be wound around the liner 30 can be made different from the start position where another enameled wire strain sensor 20 starts to be wound around the liner 30, so that the plurality of enameled wire strain sensors 20 can be wound around the liner 30 simultaneously. For example, when three enameled wire strain sensors 20 are wound around the liner 30, the central angle between the start positions can be set to 120°, so that the three enameled wire strain sensors 20 can be wound around the liner 30 simultaneously.

[0046] Additionally, multiple enameled wire strain sensors 20 can be wound around the liner 30 in a variety of ways.

[0047] In one example, multiple enameled wire strain sensors 20 can be evenly wound around the entire area of ​​the composite pressure vessel 1. This allows the strain sensors 20 to accurately detect pressure changes occurring throughout the composite pressure vessel 1. In this case, damage occurring to the composite pressure vessel 1 can be quickly identified.

[0048] In another example, each of the multiple enameled wire strain sensors 20 can be wound with a different concentration on the composite pressure vessel 1. For example, as shown in FIG. 2, the first enameled wire strain sensor 20 is wound densely around the boss portion 60 while being wound evenly and loosely around the upper portion 62, the middle portion 64, the lower portion 66, and the end portion 68; the second enameled wire strain sensor 20 is wound densely around the upper portion 62 while being wound evenly but sparsely around the boss portion 60, the middle portion 64, the lower portion 66, and the end portion 68; and the third enameled wire strain sensor 20 is wound densely around the middle portion 64 while being wound evenly but sparsely around the boss portion 60. The fourth enameled wire strain sensor 20 can be wound evenly but sparsely around the boss portion 60, the upper portion 62, the lower portion 66, and the end portion 68 while being densely wound around the lower portion 66, and the fifth enameled wire strain sensor 20 can be wound evenly but sparsely around the boss portion 60, the upper portion 62, the middle portion 64, and the end portion 68 while being densely wound around the end portion 68. In this case, damage occurring in the boss portion 60 can be confirmed using the first enameled wire strain sensor 20, damage occurring in the upper portion 62 can be confirmed using the second enameled wire strain sensor 20, damage occurring in the middle portion 64 can be confirmed using the third enameled wire strain sensor 20, damage occurring in the lower portion 66 can be confirmed using the fourth enameled wire strain sensor 20, and damage occurring in the end portion 68 can be confirmed using the fifth enameled wire strain sensor 20. In this manner, by winding each of the multiple enameled wire strain sensors 20 at a different concentration around a main portion (e.g., a portion where damage frequently occurs) of the composite material pressure vessel 1, the portion where the defect occurred in the composite material pressure vessel 1 can be identified, and data learning for monitoring the structural health state can be rapidly performed.

[0049] In another example, some of the enameled wire strain sensors 20 can be wound evenly around the entire area of ​​the composite material pressure vessel 1, while other parts of the enameled wire strain sensors 20 can be wound around the composite material pressure vessel 1 with different concentrations.

[0050] 1 and 2, an outer shell 50 encases the outside of the inner shell 40. The outer shell 50 can absorb external impacts applied to the composite pressure vessel 1. The outer shell 50 can be made of a resin, and the resin forming the outer shell 50 can be the same as or different from the resin forming the composite filaments 42, 44, 46.

[0051] To further protect the composite pressure vessel 1 from external impacts, the body 2 may further include first and second domes 3, 4. The first and second domes 3, 4 may be made of foam plastic and installed at both ends of the composite pressure vessel 1, respectively.

[0052] The inlet portion 6 is coupled to one end of the liner 30, and a passage 7 is formed inside the inlet portion 6 to fluidly communicate the outside of the liner 30 with the inside of the liner 30. At least a portion of the inlet portion 6 is surrounded by the inner shell 40, the outer shell 50, and the first dome 3. One end of the inlet portion 6 extends further to one side in the length direction and is fluidly connected to other parts by a tube, a hose, a pipe, or the like. A sensor module 10 is attached to one end of the inlet portion 6. In addition, the other end of the inlet portion 6 penetrates one end of the liner 30 and is located inside the liner 30. An internal temperature sensor 15 is attached to the other end of the inlet portion 6 to measure the internal temperature of the composite pressure vessel 1.

[0053] The sensor module 10 is attached to one end of the inlet 6 and may include an internal pressure sensor 11, an outside air temperature sensor 12, a communication connector 13, and a printed circuit board 14. In addition, both ends of an enameled wire strain sensor 20 extending to the inlet 6 are connected to the sensor module 10, and a measurement value of the strain sensor 20 or a signal corresponding thereto is transmitted to the sensor module 10. When a plurality of enameled wire strain sensors 20 are used, both ends of different strain sensors 20 are connected to different channels of the sensor module 10, and the sensor module 10 can recognize the measurement value of each strain sensor 20 and compare the measurement value of one strain sensor 20 with the measurement value of another strain sensor 20.

[0054] The internal pressure sensor 11 measures the internal pressure of the composite pressure vessel 1. The internal pressure sensor 11 is mounted in the passage 7, but is not limited thereto. The internal pressure sensor 11 can be mounted in the composite pressure vessel 1 together with an internal temperature sensor 15.

[0055] The outside air temperature sensor 12 measures the outside air temperature outside the composite pressure vessel 1. The outside air temperature sensor 12 may be mounted in the sensor module 10 or mounted outside the composite pressure vessel 1 and transmit a signal regarding the outside air temperature to the sensor module 10. Alternatively, the sensor module 10 may receive a signal regarding the outside air temperature from an outside air temperature sensor 12 mounted in a hydrogen vehicle.

[0056] The communication connector 13 communicatively couples the sensor module 10 to an external server (not shown), an external computing device (not shown), or a mobile device (not shown). The communication connector 13 may be a wireless or wired connector.

[0057] The printed circuit board 14 is communicatively coupled to the strain sensor 20, the internal pressure sensor 11, the external temperature sensor 12, and the internal temperature sensor 15, and can receive signals for the strain of the composite pressure vessel 1, the internal pressure and / or temperature of the composite pressure vessel 1, and / or the external temperature. The printed circuit board 14 can include a controller (not shown). The controller can diagnose defects and calculate the remaining life of the composite pressure vessel 1 based on the signals for the strain of the composite pressure vessel 1, the internal pressure and / or temperature of the composite pressure vessel 1, and / or the external temperature. The printed circuit board 14 is communicatively coupled to an external server, an external computing device, and / or a mobile device via the communication connector 13, either wired or wirelessly, and can transmit signals for the strain of the composite pressure vessel 1, the internal pressure and / or temperature of the composite pressure vessel 1, and / or the external temperature to the external server, the external computing device, and / or the mobile device. In addition, if the controller can diagnose the composite pressure vessel 1 itself, the printed circuit board 14 can transmit a signal corresponding to the diagnosis result of the composite pressure vessel 1 to an external server, an external computing device, and / or a mobile device.

[0058] Hereinafter, a method for manufacturing a composite material pressure vessel 1 according to an embodiment of the present invention will be described with reference to FIG.

[0059] FIG. 3 is a flow chart that illustrates a schematic of a method for manufacturing a composite pressure vessel in accordance with an embodiment of the present invention.

[0060] 3, the method for manufacturing a composite material pressure vessel 1 according to an embodiment of the present invention starts with step S100, and then steps S120 and S130 are performed in sequence. Also, step S110 may be performed between steps S100 and S120, and step S140 may be performed after step S130.

[0061] In step S100, the liner 30 coupled with the inlet portion 6 is prepared. As described above, the liner 30 is prefabricated from a polymer such as plastic or a metal, and the prefabricated inlet portion 6 is coupled to one end of the liner 30. Although not shown in FIG. 3, a sensor module 10 may be attached to one end of the inlet portion 6. The other end of the inlet portion 6 is located inside the liner 30 by penetrating one end of the liner 30, and an internal temperature sensor 15 may be attached to the other end of the inlet portion 6. The sensor module 10 may include an internal pressure sensor 11, an external temperature sensor 12, a communication connector 13, and a printed circuit board 14.

[0062] In step S110, at least one base filament 42 is wound in the length direction around the liner 30 to which the inlet portion 6 is attached. The base filament 42 may be a composite resin filament formed by impregnating carbon fiber, glass fiber, aramid fiber, etc. with a resin such as an acrylic resin, a polyester resin, an isocyanate resin, or an epoxy resin. The base filament 42 is intended to facilitate winding of the first and second filaments 44, 46, and does not necessarily have to be wound around the liner 30.

[0063] In step S120, the first and second filaments 44, 46 are wound around the liner 30 to form the inner shell 40. The first and second filaments 44, 46 may be composite resin filaments formed by impregnating carbon fiber, glass fiber, aramid fiber, etc. with resin such as acrylic resin, polyester resin, isocyanate resin, epoxy resin, etc. The first and second filaments 44, 46 may be wound on the liner 30 so as to cross each other and / or cross the base filament 42. In addition, when the first and second filaments 44, 46 are wound around the liner 30, at least one strain sensor 20 is wound around the liner 30 together. As described above, the strain sensor 20 is manufactured by manufacturing an enameled wire of a set thickness in a filament shape with a set length. The filament-shaped enameled wire strain sensor 20 is wound around the liner 30 by replacing a part of the first filament 44 or a part of the second filament 46, or together with the first filament 44 or the second filament 46. Alternatively, the first and second filaments 44, 46 may be wound around the liner 30 in one or more layers, and then the enameled wire strain sensor 20 may be wound around the liner 30 again in one or more layers. A plurality of enameled wire strain sensors 20 may be wound around the liner 30 at the same time, with the start positions of the winding being varied. A plurality of enameled wire strain sensors 20 may be wound evenly around the entire area of ​​the composite pressure vessel 1, or may be wound with different concentrations around major portions of the composite pressure vessel 1. At this time, both ends of each strain sensor 20 extend to the inlet portion. After the at least one strain sensor 20 is wound around the liner 30, both ends of the strain sensor 20 are electrically connected to the sensor module 10.

[0064] In step S130, an outer shell 50 is formed on the inner shell 40. As described above, the outer shell 50 may be made of the same or different resin as that forming the composite filaments 42, 44, 46. The outer shell 50 may be formed by applying the resin or by placing the liner 30 on which the inner shell 40 is formed in a mold and injecting the resin. However, the method of forming the outer shell 50 is not limited to the above-mentioned method.

[0065] In step S140, the composite pressure vessel 1 is manufactured by attaching a first dome 3 to one end of the outer shell 50 and a second dome 4 to the other end of the outer shell 50.

[0066] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and includes all modifications that can be easily modified by a person having ordinary skill in the art to which the invention pertains and are deemed to be equivalent to the embodiments of the present invention.

Claims

1. Providing a liner having an inlet portion; winding at least one composite filament onto the liner to form an inner shell; Including, A method for manufacturing a composite pressure vessel, in which the step of forming the inner shell comprises winding a plurality of enameled wire strain sensors, each manufactured in the form of a filament, onto a liner at a different starting position so that the sensors begin to be wound onto the liner simultaneously with the composite filament.

2. 2. The method of claim 1, wherein the plurality of enameled wire strain sensors are wound evenly across an entire area of ​​the composite pressure vessel.

3. 2. The method of claim 1, wherein the plurality of enameled wire strain sensors are wound with different concentrations locally on the composite pressure vessel.

4. 2. The method for manufacturing a composite pressure vessel as described in claim 1, wherein a portion of the plurality of enameled wire strain sensors are wound evenly across an entire area of ​​the composite pressure vessel, and another portion of the plurality of enameled wire strain sensors are wound with different concentrations locally on the composite pressure vessel.

5. The method of manufacturing a composite pressure vessel as recited in claim 1 further comprising forming an outer shell over said inner shell.

6. 6. The method of claim 5 further comprising the step of attaching a dome made of foam plastic to at least one of the ends of the outer shell.

7. 2. The method of claim 1, wherein the composite filaments include one or more of carbon fibers, glass fibers, and aramid fibers, and a resin.

8. A composite material pressure vessel manufactured by the method for manufacturing a composite material pressure vessel according to any one of claims 1 to 7.

9. 9. The composite pressure vessel of claim 8, wherein the inlet is equipped with a sensor module communicatively coupled to a strain sensor.

10. The sensor module includes: An internal pressure sensor adapted to measure the internal pressure of a composite pressure vessel; an outside air temperature sensor adapted to measure the temperature of the outside air; a printed circuit board electrically connected to the strain sensor, the internal pressure sensor, and the external air temperature sensor; 10. The composite pressure vessel of claim 9, comprising:

11. The sensor module further includes a communication connector.

11. The composite pressure vessel of claim 10, wherein the communication connector is adapted to transmit signals measured by or generated by the sensor module.

12. 12. The composite pressure vessel of claim 11, wherein the sensor module further comprises an internal temperature sensor that measures an internal temperature of the composite pressure vessel and is electrically connected to the printed circuit board.

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