A Detection Method and Device for Type III Hydrogen Storage Cylinders Based on Infrared Thermal Imaging

Abstract

The present invention discloses a method and device for detecting type III hydrogen storage cylinders based on infrared thermal imaging. Among them, the method includes the following steps: S1, using an infrared thermal imaging device to scan the inner liner of a type III hydrogen storage cylinder placed in a heating chamber, and recording the current temperature distribution of the inner liner to obtain a first thermal image; S2, converting the first thermal image into a first digital image, and obtaining the brightness values of each minimum image unit in the first digital image; S3, performing damage detection on the inner liner according to the brightness values of each minimum image unit in the first digital image. According to the method for detecting type III hydrogen storage cylinders based on infrared thermal imaging of the present invention, the infrared thermal imaging technology is used to detect type III hydrogen storage cylinders, which not only has high efficiency, but also does not need to contact the type III hydrogen storage cylinders, and can effectively avoid damaging the internal materials of the type III hydrogen storage cylinders.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage cylinder detection, and particularly relates to a detection method and device for type III hydrogen storage cylinders based on infrared thermal imaging. Background Art

[0002] As the service time of type III hydrogen storage cylinders increases, cracks, coating peeling, corrosion and other damage conditions are likely to occur in their inner liners. When the damage reaches a certain level, if the type III hydrogen storage cylinders are still used, danger will occur.

[0003] In related technologies, the inner liners of type III hydrogen storage cylinders are usually detected by manual flaw detection or endoscope inspection. Not only is the detection efficiency low, but also the contact detection method is likely to damage the internal materials of type III hydrogen storage cylinders. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a detection method for type III hydrogen storage cylinders based on infrared thermal imaging. By using infrared thermal imaging technology to detect type III hydrogen storage cylinders, the efficiency is relatively high, and there is no need to contact the type III hydrogen storage cylinders, which can effectively avoid damaging the internal materials of type III hydrogen storage cylinders.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A detection method for type III hydrogen storage cylinders based on infrared thermal imaging, characterized by comprising the following steps: S1, using an infrared thermal imaging device to scan the inner liner of the type III hydrogen storage cylinder placed in a heating chamber, and recording the current temperature distribution of the inner liner to obtain a first thermal image; S2, converting the first thermal image into a first digital image, and obtaining the brightness values of each minimum image unit in the first digital image; S3, performing damage detection on the inner liner according to the brightness values of each minimum image unit in the first digital image.

[0007] In an embodiment of the present invention, step S3 specifically includes the following steps: S31, calculating a brightness division value according to the maximum brightness value and the minimum brightness value of each minimum image unit in the first digital image, and obtaining each high-brightness minimum image unit according to the brightness division value; S32, calculating the belonging degree of the corresponding high-brightness minimum image unit to the abnormal minimum image unit according to the image information amount within a first preset range of each high-brightness minimum image unit and the number of high-brightness minimum image units that appear, and marking the high-brightness minimum image unit with the belonging degree greater than or equal to the preset belonging degree as the abnormal minimum image unit; S33, clustering each abnormal minimum image unit to obtain a plurality of minimum image unit sets, calculating the confidence value of the corresponding minimum image unit set belonging to the suspected damage range according to the belonging degree and density of each abnormal minimum image unit in each minimum image unit set, and marking the minimum image unit set with the confidence degree greater than or equal to the preset confidence degree as the suspected damage range; S34, confirming whether there is damage to the inner liner according to the suspected damage range.

[0008] In an embodiment of the present invention, the belonging degree of the high-brightness minimum image unit to the abnormal minimum image unit is calculated by the following formula:

[0009] ,

[0010] where and are respectively the belonging degree corresponding to the k-th high-brightness minimum image unit and the side length of the first preset range, and are respectively the brightness value of the u-th minimum image unit within the first preset range corresponding to the k-th high-brightness minimum image unit and the probability of the brightness value of the u-th minimum image unit appearing within the first preset range, is the total number of high-brightness minimum image units within the first preset range.

[0011] In an embodiment of the present invention, the confidence value of the minimum image unit set belonging to the suspected damage range is calculated by the following formula:

[0012] ,

[0013] where is the confidence value of the j-th minimum image unit set belonging to the suspected damage range, is the variance of the belonging degrees of the abnormal minimum image units in the j-th minimum image unit set, is the density of the abnormal minimum image units in the j-th minimum image unit set.

[0014] In one embodiment of the present invention, the average value of the maximum lightness value and the minimum lightness value is calculated to obtain the lightness division value.

[0015] A type-III hydrogen storage cylinder detection device based on infrared thermal imaging, characterized by comprising the following steps: a first acquisition module, which is used to scan the inner liner of the type-III hydrogen storage cylinder placed in a heating chamber by using an infrared thermal imaging device, and record the current temperature distribution of the inner liner to obtain a first thermal image; a second acquisition module, which is used to convert the first thermal image into a first digital image and obtain the lightness values of each minimum image unit in the first digital image; a damage detection module, which is used to perform damage detection on the inner liner according to the lightness values of each minimum image unit in the first digital image.

[0016] A computer device includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the above-mentioned type-III hydrogen storage cylinder detection method based on infrared thermal imaging is implemented.

[0017] A non-transitory computer-readable storage medium stores a computer program, and when the program is executed by a processor, the above-mentioned type-III hydrogen storage cylinder detection method based on infrared thermal imaging is implemented.

[0018] Advantages of the present invention:

[0019] The present invention uses infrared thermal imaging technology to detect type-III hydrogen storage cylinders, which not only has high efficiency, but also does not need to contact the type-III hydrogen storage cylinders, and can effectively avoid damaging the internal materials of the type-III hydrogen storage cylinders. Description of the drawings

[0020] Figure 1 is a flowchart of the type-III hydrogen storage cylinder detection method based on infrared thermal imaging according to an embodiment of the present invention;

[0021] Figure 2 is a block diagram of the type-III hydrogen storage cylinder detection device based on infrared thermal imaging according to an embodiment of the present invention. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Figure 1Flow chart of the method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to an embodiment of the present invention.

[0024] As Figure 1 shown, the method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to an embodiment of the present invention may include the following steps:

[0025] S1, Use an infrared thermal imaging device to scan the inner liner of a type III hydrogen storage cylinder placed in a heating chamber, and record the current temperature distribution of the inner liner to obtain a first thermal image;

[0026] Among them, the current heating temperature in the heating chamber may be a first preset temperature.

[0027] S2, Convert the first thermal image into a first digital image, and obtain the brightness values of each minimum image unit in the first digital image.

[0028] In an embodiment of the present invention, when using an infrared thermal imaging device to scan the inner liner of a type III hydrogen storage cylinder placed in a heating chamber, it can be scanned at different angles to obtain multiple first thermal images, and for each first thermal image, steps S1-S4 in the present invention are used to detect damage to the inner liner.

[0029] It should be noted that at each scanning angle, the inner liner of the type III hydrogen storage cylinder can be scanned multiple times at different distances to obtain multiple second thermal images, and the multiple second thermal images are respectively converted into second digital images, and the first digital image is selected from the multiple second digital images.

[0030] In an embodiment of the present invention, selecting the first digital image from multiple second digital images includes the following steps:

[0031] S21, Calculate the gradient magnitude of each minimum image unit of each second digital image respectively, and calculate the brightness change rate of the second digital image according to the gradient magnitude.

[0032] S22, Extract the minimum image units with a gradient magnitude greater than or equal to the preset gradient magnitude as target minimum image units.

[0033] S23, Calculate the position dispersion degree of the brightness change in the second digital image according to the position information of each target minimum image unit.

[0034] S24, Calculate the weight factor of the corresponding second digital image according to the position dispersion degree.

[0035] Among them, the weight factor of the second digital image can be calculated by the following formula:

[0036] ,

[0037] Among them, is the weight factor of the m-th second digital image, is the position dispersion degree corresponding to the m-th second digital image, is the minimum position dispersion degree among the position dispersion degrees corresponding to each second digital image.

[0038] S25. Calculate the image quality score of the corresponding second digital image according to the weight factor and the brightness change rate corresponding to the second digital image.

[0039] In an embodiment of the present invention, it is possible to determine whether the number of target minimum image units in the second digital image is greater than or equal to a preset number. If the number of target minimum image units in the second digital image is greater than or equal to the preset number, then multiply the weight factor and the brightness change rate to obtain the image quality score of the second digital image; if the number of target minimum image units in the second digital image is less than the preset number, then use the brightness change rate as the image quality score for obtaining the second digital image.

[0040] S26. Extract the second digital image with the largest image quality score from the image quality scores of each second digital image as the first digital image.

[0041] Thus, the digital image with the highest quality can be extracted from multiple second digital images as the first digital image, thereby further improving the accuracy of detecting type III hydrogen storage cylinders.

[0042] S3. Perform damage detection on the inner liner according to the lightness values of each minimum image unit in the first digital image.

[0043] In an embodiment of the present invention, step S3 specifically includes the following steps:

[0044] S31. Calculate the lightness division value according to the maximum lightness value and the minimum lightness value of each minimum image unit in the first digital image, and obtain each high-lightness minimum image unit according to the lightness division value.

[0045] Specifically, extract the maximum lightness value and the minimum lightness value from the lightness values of each minimum image unit in the first digital image, obtain the lightness division value according to the maximum lightness value and the minimum lightness value, and confirm the minimum image unit with a lightness value greater than the lightness division value in the first digital image as the high-lightness minimum image unit.

[0046] In an embodiment of the present invention, calculate the average value of the maximum lightness value and the minimum lightness value to obtain the lightness division value. In other embodiments of the present invention, the lightness division value can also be calculated by other methods, and specifically can be selected according to the actual situation.

[0047] S32. Calculate the attribution degree of each minimum high-brightness image unit belonging to the minimum abnormal image unit according to the image information amount within the first preset range of each minimum high-brightness image unit and the number of minimum high-brightness image units that appear, and mark the minimum high-brightness image units with the attribution degree greater than or equal to the preset attribution degree as the minimum abnormal image units.

[0048] Specifically, calculate the attribution degree of each minimum high-brightness image unit belonging to the minimum abnormal image unit according to the number of minimum high-brightness image units that appear within the first preset range of each minimum high-brightness image unit and the image information amount within the first preset range of the target minimum high-brightness image unit, and when the attribution degree is greater than or equal to the preset attribution degree, mark the corresponding minimum high-brightness image unit as the minimum abnormal image unit.

[0049] Among them, in an embodiment of the present invention, the attribution degree of the minimum high-brightness image unit belonging to the minimum abnormal image unit is calculated by the following formula:

[0050] ,

[0051] Among them, is the attribution degree of the kth minimum high-brightness image unit belonging to the minimum abnormal image unit, is the side length of the first preset range corresponding to the kth minimum high-brightness image unit, is the total number of minimum image units within the first preset range corresponding to the kth minimum high-brightness image unit, is the brightness value of the u-th minimum image unit within the first preset range corresponding to the kth minimum high-brightness image unit, is the probability that the brightness value of the u-th minimum image unit within the first preset range corresponding to the kth minimum high-brightness image unit appears within the first preset range, is the total number of minimum high-brightness image units within the first preset range corresponding to the kth minimum high-brightness image unit, is the image information amount within the first preset range corresponding to the kth minimum high-brightness image unit.

[0052] S33. Cluster each of the minimum abnormal image units to obtain a plurality of minimum image unit sets, calculate the confidence value of each minimum image unit set belonging to the suspected damage range according to the attribution degree and density of each abnormal minimum image unit in each minimum image unit set, and mark the minimum image unit sets with the confidence degree greater than or equal to the preset confidence degree as the suspected damage range.

[0053] Specifically, cluster each abnormal minimum image unit to obtain multiple minimum image unit sets. Calculate the confidence value of the corresponding minimum image unit set belonging to the suspected damage range according to the membership degree of each abnormal minimum image unit in each minimum image unit set and the density of the abnormal minimum image units in the minimum image unit set. When the confidence level is greater than or equal to the preset confidence level, mark the corresponding minimum image unit set as the suspected damage range.

[0054] Among them, in an embodiment of the present invention, the confidence value of the minimum image unit set belonging to the suspected damage range is calculated by the following formula:

[0055] ,

[0056] Wherein, is the confidence value of the j-th minimum image unit set belonging to the suspected damage range, is the variance of the membership degree of the abnormal minimum image units in the j-th minimum image unit set, is the density of the abnormal minimum image units in the j-th minimum image unit set.

[0057] S34. Confirm whether there is damage to the inner liner according to the suspected damage range.

[0058] Specifically, after obtaining the first digital image, the suspected damage range can be extracted from the first digital image according to the brightness values of the minimum image units in the first digital image, and then it is confirmed whether there is damage to the inner liner based on the suspected damage range, so as to avoid the situation that the high-brightness minimum image units (the tiny flaw points that do not affect the type III hydrogen storage cylinder) outside the damage range misjudge the detection result, thereby improving the accuracy and efficiency of the detection.

[0059] In summary, according to the method for detecting a type III hydrogen storage cylinder based on infrared thermal imaging according to the embodiments of the present invention, an infrared thermal imaging device is used to scan the inner liner of the type III hydrogen storage cylinder placed in the heating chamber, record the current temperature distribution of the inner liner to obtain the first thermal image, convert the first thermal image into the first digital image, obtain the brightness values of the minimum image units in the first digital image, and detect damage to the inner liner according to the brightness values of the minimum image units in the first digital image. Thus, detecting the type III hydrogen storage cylinder by using infrared thermal imaging technology not only has high efficiency, but also does not need to contact the type III hydrogen storage cylinder, and can effectively avoid damaging the internal materials of the type III hydrogen storage cylinder.

[0060] Corresponding to the method for detecting a type III hydrogen storage cylinder based on infrared thermal imaging in the above embodiment, the present invention also proposes a device for detecting a type III hydrogen storage cylinder based on infrared thermal imaging.

[0061] Such asFigure 2 As shown in the figure, the type III hydrogen storage cylinder detection device based on infrared thermal imaging according to the embodiment of the present invention may include: a first acquisition module 100, a second acquisition module 200, and a damage detection module 300.

[0062] Among them, the first acquisition module is used to scan the inner liner of the type III hydrogen storage cylinder placed in the heating bin by using an infrared thermal imaging device, and record the current temperature distribution of the inner liner to obtain a first thermal image; the second acquisition module is used to convert the first thermal image into a first digital image, and obtain the brightness values of each minimum image unit in the first digital image; the damage detection module is used to detect damage to the inner liner according to the brightness values of each minimum image unit in the first digital image.

[0063] In an embodiment of the present invention, the damage detection module 300 is specifically used to: calculate a brightness division value according to the maximum brightness value and the minimum brightness value of each minimum image unit in the first digital image, and obtain each high-brightness minimum image unit according to the brightness division value; calculate the attribution degree of the corresponding high-brightness minimum image unit belonging to the abnormal minimum image unit according to the image information amount within a first preset range of each high-brightness minimum image unit and the number of high-brightness minimum image units that appear, and mark the high-brightness minimum image unit with the attribution degree greater than or equal to the preset attribution degree as the abnormal minimum image unit; cluster each abnormal minimum image unit to obtain a plurality of minimum image unit sets, calculate the confidence value of the corresponding minimum image unit set belonging to the suspected damage range according to the attribution degree and density of each abnormal minimum image unit in each minimum image unit set, and mark the minimum image unit set with the confidence degree greater than or equal to the preset confidence degree as the suspected damage range; confirm whether there is damage to the inner liner according to the suspected damage range.

[0064] In an embodiment of the present invention, the damage detection module 300 is specifically used to calculate the attribution degree of the high-brightness minimum image unit belonging to the abnormal minimum image unit through the following formula:

[0065] ,

[0066] Among them, and are respectively the attribution degree corresponding to the kth high-brightness minimum image unit and the side length of the first preset range, and are respectively the brightness value of the u-th minimum image unit within the first preset range corresponding to the kth high-brightness minimum image unit and the probability of the brightness value of the u-th minimum image unit appearing within the first preset range, is the total number of high-brightness minimum image units within the first preset range.

[0067] In one embodiment of the present invention, the damage detection module 300 is specifically configured to calculate the confidence value of the attribution of the set of minimum image units to the suspected damage range through the following formula:

[0068] ,

[0069] where, is the confidence value of the j-th set of minimum image units belonging to the suspected damage range, is the variance of the attribution degree of the abnormal minimum image units in the j-th set of minimum image units, is the density of the abnormal minimum image units in the j-th set of minimum image units.

[0070] In one embodiment of the present invention, the average value of the maximum brightness value and the minimum brightness value is calculated to obtain the brightness division value.

[0071] It should be noted that for the details not disclosed in the III-type hydrogen storage cylinder detection device based on infrared thermal imaging in the embodiments of the present invention, please refer to the details disclosed in the above-mentioned III-type hydrogen storage cylinder detection method based on infrared thermal imaging, and will not be elaborated here specifically.

[0072] According to the III-type hydrogen storage cylinder detection device based on infrared thermal imaging in the embodiments of the present invention, the first acquisition module uses an infrared thermal imaging device to scan the inner liner of the III-type hydrogen storage cylinder placed in the heating chamber, and records the current temperature distribution of the inner liner to obtain the first thermal image. And the second acquisition module converts the first thermal image into a first digital image, and obtains the brightness values of each minimum image unit in the first digital image, and the damage detection module performs damage detection on the inner liner according to the brightness values of each minimum image unit in the first digital image. Thus, by using infrared thermal imaging technology to detect the III-type hydrogen storage cylinder, not only the efficiency is relatively high, but also there is no need to contact the III-type hydrogen storage cylinder, which can effectively avoid damaging the internal materials of the III-type hydrogen storage cylinder.

[0073] Corresponding to the above embodiments, the present invention also proposes a computer device.

[0074] The computer device in the embodiments of the present invention includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the III-type hydrogen storage cylinder detection method based on infrared thermal imaging in the above embodiments.

[0075] According to the computer device in the embodiments of the present invention, by using infrared thermal imaging technology to detect the III-type hydrogen storage cylinder, not only the efficiency is relatively high, but also there is no need to contact the III-type hydrogen storage cylinder, which can effectively avoid damaging the internal materials of the III-type hydrogen storage cylinder.

[0076] Corresponding to the above embodiments, the present invention also provides a non-transitory computer-readable storage medium.

[0077] The non-transitory computer-readable storage medium according to the embodiments of the present invention stores a computer program, and when the program is executed by a processor, it implements the above-described method for detecting type III hydrogen storage cylinders based on infrared thermal imaging.

[0078] According to the non-transitory computer-readable storage medium of the embodiments of the present invention, by using infrared thermal imaging technology to detect type III hydrogen storage cylinders, not only is the efficiency relatively high, but also there is no need to contact the type III hydrogen storage cylinders, which can effectively avoid damaging the internal materials of the type III hydrogen storage cylinders.

[0079] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0080] In the present invention, unless otherwise clearly defined and limited, the terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0081] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0082] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0083] In addition, each functional unit in various embodiments of the present invention may be integrated into a processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above integrated module may be implemented in the form of hardware or in the form of a software functional module. When the above integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0084] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for detecting type III hydrogen storage cylinders based on infrared thermal imaging, characterized in that: The following steps are involved: S1, using infrared thermal imaging equipment to scan the inner liner of the type III hydrogen storage cylinder placed in the heating chamber, and record the current temperature distribution of the inner liner to obtain a first thermal image; S2, converting the first thermal image into a first digital image, and obtaining the brightness value of each minimum image unit in the first digital image; S3, performing damage detection on the inner container according to the brightness value of each minimum image unit in the first digital image; wherein step S3 specifically includes the following steps: S31, calculating a brightness division value according to the maximum brightness value and the minimum brightness value of each minimum image unit in the first digital image, and obtaining each high brightness minimum image unit according to the brightness division value; S32, calculating the degree of belonging of the corresponding high-brightness minimum image unit to the abnormal minimum image unit according to the image information amount within the first preset range of each high-brightness minimum image unit and the number of high-brightness minimum image units that appear, and marking the high-brightness minimum image unit whose degree of belonging is greater than or equal to the preset degree of belonging as the abnormal minimum image unit; S33, clustering the abnormal minimum image units to obtain multiple minimum image unit sets, calculating the confidence value of the corresponding minimum image unit set belonging to the suspected damage range according to the attribution degree and density of each abnormal minimum image unit in each minimum image unit set, and marking the minimum image unit set whose confidence value is greater than or equal to a preset confidence value as the suspected damage range; S34, confirming whether the inner tank is damaged according to the suspected damage range.

2. The method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to claim 1, characterized in that: The degree of attribution of the high brightness minimum image unit to the abnormal minimum image unit is calculated by the following formula: ,in, and are respectively the belonging degree corresponding to the kth high brightness minimum image unit and the side length of the first preset range, and are respectively the brightness value of the uth minimum image unit in the first preset range corresponding to the kth high brightness minimum image unit and the probability of the brightness value of the uth minimum image unit appearing in the first preset range, is the total number of high-brightness minimum image units within the first preset range.

3. The method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to claim 2 is characterized in that: The confidence value that the minimum image unit set belongs to the suspected damage range is calculated by the following formula: ， in, is the confidence value that the jth minimum image unit set belongs to the suspected damage range, is the variance of the degree of belonging of the abnormal minimum image unit in the jth minimum image unit set, is the density of the abnormal minimum image unit in the jth minimum image unit set.

4. The method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to claim 1, characterized in that: An average value of the maximum brightness value and the minimum brightness value is calculated to obtain the brightness division value.

5. A type III hydrogen storage cylinder detection device based on infrared thermal imaging, characterized in that: include: A first acquisition module, the first acquisition module is used to use an infrared thermal imaging device to scan the inner liner of the type III hydrogen storage cylinder placed in the heating chamber, and record the current temperature distribution of the inner liner to obtain a first thermal image; A second acquisition module, the second acquisition module is used to convert the first thermal image into a first digital image, and obtain the brightness value of each minimum image unit in the first digital image; A damage detection module, the damage detection module is used to detect damage to the inner liner according to the brightness value of each minimum image unit in the first digital image; wherein the damage detection module is specifically used to: calculate a brightness division value according to the maximum brightness value and the minimum brightness value of each minimum image unit in the first digital image, and obtain each high brightness minimum image unit according to the brightness division value; According to the amount of image information within the first preset range of each high-brightness minimum image unit and the number of high-brightness minimum image units that appear, the degree of attribution of the corresponding high-brightness minimum image unit to the abnormal minimum image unit is calculated, and the high-brightness minimum image unit whose attribution degree is greater than or equal to the preset attribution degree is marked as the abnormal minimum image unit; each of the abnormal minimum image units is clustered to obtain a plurality of minimum image unit sets, and according to the degree of attribution and density of each abnormal minimum image unit in each of the minimum image unit sets, the confidence value that the corresponding minimum image unit set belongs to the suspected damage range is calculated, and the minimum image unit set whose confidence value is greater than or equal to the preset confidence value is marked as the suspected damage range; and whether the liner is damaged is confirmed according to the suspected damage range.

6. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to any one of claims 1 to 4 is implemented.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, a method for detecting type III hydrogen storage cylinders based on infrared thermal imaging according to any one of claims 1 to 4 is implemented.

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