High-pressure gas cylinder detection method and device

Abstract

The present application discloses a method and device for detecting high-pressure gas cylinders, comprising: utilizing an acoustic signal receiver pre-distributed on the body of the high-pressure gas cylinder to receive acoustic emission signals generated by acoustic emission sources on both the inner and outer sides of the port of the high-pressure gas cylinder; comparing the acoustic emission signal with a first difference between a pre-obtained corresponding standard acoustic emission signal to determine whether it is within a preset first range; if the first difference exceeds the first range, determining that the high-pressure gas cylinder is defective. The present application pre-measures a standard acoustic emission signal on a qualified high-pressure gas cylinder, and then re-measures the acoustic emission signal at the same position on the body of the high-pressure gas cylinder to be tested. Whether the high-pressure gas cylinder is defective is determined by determining whether the difference between the currently detected acoustic emission signal and the standard acoustic emission signal is within the preset first range. The detection process does not cause damage to the high-pressure gas cylinder, while also ensuring detection accuracy.

Description

Technical Field

[0001] The present application relates to the field of industrial production, and in particular to a method and device for detecting high-pressure gas cylinders. Background Art

[0002] Hydrogen energy has great potential for application in transportation, industry, power generation, energy storage and other fields.

[0003] Safety testing of hydrogen energy equipment is crucial for the application of hydrogen energy technology. High-pressure hydrogen storage vessels have become the primary onboard hydrogen storage method for hydrogen fuel cell vehicles due to their simple structure, high hydrogen storage density, and rapid filling and discharge. The hydrogen in hydrogen cylinders is high-pressure. Fatigue or sudden damage to a hydrogen cylinder could cause leakage, posing a serious safety hazard. Therefore, regular and real-time online testing of hydrogen cylinders is essential.

[0004] The internal pressure of high-pressure hydrogen storage bottles and other gas storage bottles can reach as high as 35MPa or even 70MPa, and there are currently no clear testing standards. The current non-destructive testing technologies for bottles mainly include penetrant testing and ultrasonic testing. Penetrant testing is a non-destructive testing method based on the principle of capillary action to detect surface opening defects, but it requires the removal of stored materials and the use of chemicals to contaminate the inner wall, and cannot guarantee the purity of hydrogen. Ultrasonic testing is a non-destructive testing method that uses the acoustic properties of the material and its defects to reflect the ultrasonic propagation waveform and the energy change of the penetration time to detect internal defects in the material. However, its detection accuracy for high-pressure hydrogen storage containers still cannot meet the current quality inspection needs of hydrogen storage bottles.

[0005] Therefore, a detection method with little damage to high-pressure gas cylinders and high accuracy is needed. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a high-pressure gas cylinder detection method and device to reduce damage to high-pressure gas cylinders and improve detection accuracy. The specific solution is as follows:

[0007] A high-pressure gas cylinder detection method, comprising:

[0008] Using the acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder, the acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas storage cylinder are received;

[0009] Comparing a first difference between the acoustic emission signal and a corresponding pre-obtained standard acoustic emission signal to determine whether the first difference is within a preset first range;

[0010] If the first difference exceeds the first range, it is determined that the high-pressure gas cylinder has a defect;

[0011] The standard acoustic emission signal is an acoustic emission signal pre-measured at the same position of a qualified high-pressure gas storage cylinder.

[0012] Optionally, also include:

[0013] During the operation of the high-pressure gas storage cylinder, receiving acoustic signals fed back by acoustic signal receivers pre-distributed on the cylinder body of the high-pressure gas storage cylinder;

[0014] determining whether a second difference between the acoustic signal and a pre-obtained stretching acoustic signal is within a preset second range;

[0015] If the second difference exceeds the second range, it is determined that the high-pressure gas cylinder has a defect;

[0016] The tensile sound signal is obtained by performing a tensile test on a test block made of the same material as the high-pressure gas cylinder.

[0017] Optionally, the process of using acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder to receive acoustic emission signals generated by acoustic emission sources on both sides of the inner and outer sides of the port of the high-pressure gas storage cylinder includes:

[0018] 18 acoustic signal receivers uniformly distributed on the body of the high-pressure gas storage cylinder are used to receive the acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas storage cylinder.

[0019] Optionally, the process of using 18 acoustic signal receivers pre-distributed evenly on the body of the high-pressure gas storage cylinder to receive acoustic emission signals generated by acoustic emission sources on both sides of the inner and outer sides of the port of the high-pressure gas storage cylinder includes:

[0020] 18 acoustic signal receivers uniformly distributed on the body of the high-pressure gas cylinder are used to receive acoustic emission signals generated by the lead breaking operation on both sides of the port of the high-pressure gas cylinder.

[0021] Optionally, the process of using acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder to receive acoustic emission signals generated by acoustic emission sources on both sides of the inner and outer sides of the port of the high-pressure gas storage cylinder includes:

[0022] The acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder are used to receive multiple acoustic emission signals generated by acoustic emission sources on both sides of the port of the high-pressure gas storage cylinder.

[0023] Optionally, the process of comparing whether a first difference between the acoustic emission signal and a pre-obtained corresponding standard acoustic emission signal is within a preset first range includes:

[0024] Determine whether the difference between multiple acoustic emission signals meets the preset error requirements;

[0025] If the error requirement is met, averaging multiple acoustic emission signals generated at the same occurrence position to obtain an average acoustic emission signal;

[0026] The average acoustic emission signal is compared with a pre-obtained corresponding standard acoustic emission signal to determine whether a first difference is within a preset first range.

[0027] Optionally, after the first difference exceeds the first range, the method further includes:

[0028] The location range of the defect point is determined by using the position information between the acoustic signal receiver that detects the acoustic emission signal and the acoustic emission source.

[0029] The present invention also discloses a high-pressure gas cylinder detection device, comprising: a base, a first gas cylinder gland, a second gas cylinder gland, and acoustic signal receivers distributed on the base, the first gas cylinder gland, and the second gas cylinder gland;

[0030] The upper surface of the base is recessed and is provided with a plurality of acoustic signal receivers, so that when a high-pressure gas cylinder is placed on the base, all the acoustic signal receivers on the upper surface of the base can fit in contact with the high-pressure gas cylinder. The base includes a limiting device to fix the position of the high-pressure gas cylinder on the base;

[0031] The first gas cylinder gland and the second gas cylinder gland are rotatably connected to the base, respectively, so that when the first gas cylinder gland and the second gas cylinder gland are closed, the acoustic signal receivers arranged on the inner surfaces of the first gas cylinder gland and the second gas cylinder gland can fit with the high-pressure gas cylinder placed on the base;

[0032] The acoustic signal receiver is used to receive the acoustic emission signal and the acoustic signal required in the above-mentioned high-pressure gas cylinder detection method.

[0033] Optionally, the first gas cylinder gland and the second gas cylinder gland are respectively connected to the base via a movable hinge.

[0034] Optionally, six acoustic signal receivers are evenly distributed on the first gas cylinder gland, the second gas cylinder gland and the base, respectively, so that signals from 18 positions in the front, middle and rear rows of the high-pressure gas cylinders can be detected.

[0035] In the present application, a high-pressure gas cylinder inspection method includes: using an acoustic signal receiver pre-distributed on the body of the high-pressure gas cylinder to receive acoustic emission signals generated by acoustic emission sources on both the inner and outer sides of a port of the high-pressure gas cylinder; comparing whether a first difference between the acoustic emission signal and a pre-obtained corresponding standard acoustic emission signal is within a preset first range; if the first difference exceeds the first range, determining that the high-pressure gas cylinder is defective; wherein the standard acoustic emission signal is an acoustic emission signal pre-measured at the same position of a qualified high-pressure gas cylinder.

[0036] The present application measures a standard acoustic emission signal on a qualified high-pressure gas cylinder in advance, and then detects the acoustic emission signal again at the same position on the body of the high-pressure gas cylinder to be tested. Whether the high-pressure gas cylinder has a defect is determined by whether the difference between the currently detected acoustic emission signal and the standard acoustic emission signal is within a preset first range. The high-pressure gas cylinder will not be damaged during the detection process, and the detection accuracy can also be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0038] Figure 1 This is a flow chart of a high-pressure gas cylinder detection method disclosed in an embodiment of the present application;

[0039] Figure 2 This is a schematic diagram of the installation position of a high-pressure gas cylinder acoustic signal receiver disclosed in an embodiment of the present application;

[0040] Figure 3 This is a flow chart of another high-pressure gas cylinder detection method disclosed in an embodiment of the present application;

[0041] Figure 4 This is a flow chart of another high-pressure gas cylinder detection method disclosed in an embodiment of the present application;

[0042] Figure 5 A top view of the structure of a high-pressure gas cylinder detection device disclosed in an embodiment of the present application;

[0043] Figure 6 This is a side view of the structure of a high-pressure gas cylinder detection device disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The present application discloses a method for detecting a high-pressure gas cylinder. Figure 1 As shown, the method includes:

[0046] S11: using acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder to receive acoustic emission signals generated by acoustic emission sources on both sides of the inner and outer sides of the port of the high-pressure gas storage cylinder.

[0047] For details, see Figure 2 As shown, a plurality of acoustic signal receivers 2 can be pre-installed on the high-pressure gas cylinder 1 to be tested, so as to receive acoustic emission signals at different positions on the body of the high-pressure gas cylinder 1, thereby facilitating subsequent analysis of whether there are defects such as cracks, deformation, damage or internal structure changes at different positions on the body of the high-pressure gas cylinder 1.

[0048] Specifically, acoustic emission signals are generated on the high-pressure gas cylinder by acoustic emission sources on both sides of the port of the high-pressure gas cylinder, so that the acoustic signal receiver can receive the acoustic emission signals transmitted from the port of the high-pressure gas cylinder.

[0049] S12: comparing a first difference between the acoustic emission signal and a pre-obtained corresponding standard acoustic emission signal to determine whether the difference is within a preset first range;

[0050] S13: If the first difference exceeds the first range, it is determined that the high-pressure gas storage cylinder has a defect.

[0051] Specifically, if there is a defect between the acoustic signal receiver and the port of the high-pressure gas storage cylinder, the acoustic emission signal received by the acoustic signal receiver will have a certain difference from the corresponding standard acoustic emission signal obtained in advance. Therefore, if the first difference between the acoustic emission signal and the corresponding standard acoustic emission signal obtained in advance exceeds a preset first range, it can be determined that there is a defect on the bottle body of the high-pressure gas storage cylinder.

[0052] Among them, the standard acoustic emission signal is the acoustic emission signal measured in advance at the same position of a qualified high-pressure gas cylinder. For example, a qualified high-pressure gas cylinder that has been tested and confirmed to be qualified by other means is obtained in advance, and an acoustic signal receiver is arranged on the qualified high-pressure gas cylinder. At the same time, an acoustic emission signal is generated by an acoustic emission source on both sides of the port of the qualified high-pressure gas cylinder, and received by the acoustic signal receiver. At this time, the acoustic emission signal received by the acoustic signal receiver on each qualified high-pressure gas cylinder is used as the standard acoustic emission signal. Since each high-pressure gas cylinder is produced on the production line, the difference is small and can be defaulted to be the same. Therefore, as long as the acoustic emission signal received by the acoustic signal receiver at the same position of the high-pressure gas cylinder to be tested is the same as that of the qualified high-pressure gas cylinder, If the difference between the two signals is within a certain range, it can be determined that there is no defect. If it exceeds the preset first range, it can be determined that there is a defect. For example, if the acoustic emission signal received by the acoustic signal receiver at position A of the qualified high-pressure gas cylinder is 10db, then when the acoustic emission signal received by the acoustic signal receiver at the same relatively position A of the high-pressure gas cylinder to be tested is 15db, the first difference with the standard acoustic emission signal of 10db is 5bd, which exceeds the preset first range of ±3db, so the high-pressure gas cylinder to be tested is defective. If the acoustic emission signal received by the acoustic signal receiver at the same relatively position A of the high-pressure gas cylinder to be tested is 12db, which is within the first range of ±3db, then the high-pressure gas cylinder to be tested is considered normal and without defects.

[0053] It is understood that the acoustic emission signal emitted by the acoustic emission source is controllable, and the same acoustic emission source is selected during testing. Therefore, by comparing the difference between the standard acoustic emission signal and the currently detected acoustic emission signal, it is possible to determine whether the high-pressure gas cylinder is defective. Furthermore, although it is assumed that there is no significant difference between the qualified high-pressure gas cylinder and the test cylinder, a first range is set to prevent the influence of various error factors. A defect is only determined if the cylinder exceeds this first range.

[0054] Specifically, if the first difference does not exceed the first range, it is determined that the high-pressure gas storage cylinder is normal, no additional action is required, and the system can wait for the next inspection.

[0055] It can be seen that in the embodiment of the present application, a standard acoustic emission signal is measured on a qualified high-pressure gas cylinder in advance, and then the acoustic emission signal is detected again at the same position on the body of the high-pressure gas cylinder to be tested. Whether the high-pressure gas cylinder has a defect is determined by whether the difference between the currently detected acoustic emission signal and the standard acoustic emission signal is within a preset first range. The high-pressure gas cylinder will not be damaged during the detection process, and the detection accuracy can also be guaranteed.

[0056] Specifically, in order to improve the detection accuracy and cover the entire body of the high-pressure gas cylinder, 18 acoustic signal receivers pre-evenly distributed on the body of the high-pressure gas cylinder can be used to receive the acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas cylinder.

[0057] Specifically, the high-pressure gas cylinder can be divided into three parts: front, middle and back. Each part can be equipped with a circle of 6 evenly distributed sound signal receivers. Three circles of sound signal receivers can also be set at equal intervals to ensure that there are enough sampling points to detect every position of the high-pressure gas cylinder body in all directions.

[0058] Specifically, 18 acoustic signal receivers pre-distributed evenly across the cylinder can be used to receive acoustic emission signals generated by a lead-breaking operation on both the inside and outside of the cylinder's port. Testing can be based on a lead-breaking test, so the lead-breaking operation can be used as the acoustic emission source, or other methods such as tapping can be used to generate the sound source, as long as the sound source is consistent in magnitude.

[0059] It can be understood that this detection method is applicable to high-pressure hydrogen storage bottles.

[0060] The embodiment of this application discloses a specific method for detecting high-pressure gas cylinders. Compared with the previous embodiment, this embodiment further explains and optimizes the technical solution. Figure 3 As shown, specifically:

[0061] S21: using acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder to receive multiple acoustic emission signals generated by acoustic emission sources on both sides of the inner and outer sides of the port of the high-pressure gas storage cylinder.

[0062] Specifically, in order to reduce the impact of errors and improve the accuracy of detection, the acoustic emission source can be used to generate multiple acoustic emission signals on the inner and outer sides each time, for example, three acoustic emission signals are generated on the inner and outer sides each time, thereby increasing the number of samples.

[0063] Specifically, in order to reduce variables, the level of the acoustic emission signal generated by the acoustic emission source should be the same each time, so as to facilitate subsequent verification of whether the acoustic emission signal received by the acoustic signal receiver meets the requirements. For example, a 10dB acoustic emission signal should be generated three times in succession instead of generating signals of different decibels.

[0064] S22: Determine whether the difference between the multiple acoustic emission signals meets the preset error requirement.

[0065] Specifically, in order to reduce the influence of various errors and other interference factors, it is possible to first determine whether the difference between multiple sound emission signals meets the preset error requirements. For example, an acoustic signal receiver receives sound emission signals of 10db, 11db and 10db respectively. The maximum difference between the three sound emission signals is 1db, which is between the preset error requirements of ±2db. Therefore, the multiple sound emission signals received this time are valid and can continue to be used. If an acoustic signal receiver receives sound emission signals of 10db, 9db and 13db respectively, the maximum difference between the three sound emission signals is 4db, which exceeds the preset error requirements of ±2db. Therefore, the three sound emission signals received by the acoustic signal receiver can be deemed invalid, and there may be interference from external factors, and retesting is required.

[0066] S23: If the error requirement is met, multiple acoustic emission signals generated at the same occurrence position are averaged to obtain an average acoustic emission signal.

[0067] Specifically, averaging the acoustic emission signals generated multiple times can effectively reduce the impact of errors, so that the average acoustic emission signal can be used for subsequent judgment to obtain more accurate results.

[0068] S24: Compare the average acoustic emission signal and the corresponding pre-obtained standard acoustic emission signal to see whether the first difference is within a preset first range.

[0069] Specifically, the average acoustic emission signal that can better reflect the actual situation is compared with the corresponding standard acoustic emission signal, thereby improving the accuracy of the detection result.

[0070] S25: If the first difference exceeds the first range, it is determined that the high-pressure gas cylinder has a defect.

[0071] The standard acoustic emission signal is an acoustic emission signal measured in advance at the same position of a qualified high-pressure gas storage cylinder.

[0072] The embodiment of this application discloses a specific method for detecting high-pressure gas cylinders. Compared with the previous embodiment, this embodiment further explains and optimizes the technical solution. Figure 4 As shown, specifically:

[0073] S31: using acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder to receive acoustic emission signals generated by acoustic emission sources on both sides of the inner and outer sides of the port of the high-pressure gas storage cylinder;

[0074] S32: comparing a first difference between the acoustic emission signal and a pre-obtained corresponding standard acoustic emission signal to determine whether the difference is within a preset first range;

[0075] The standard acoustic emission signal is an acoustic emission signal measured in advance at the same position of a qualified high-pressure gas storage cylinder.

[0076] S33: If the first difference exceeds the first range, it is determined that the high-pressure gas storage cylinder has a defect.

[0077] S34: Determine the existence range of the defect point using the position information between the acoustic signal receiver that detects the acoustic emission signal and the acoustic emission source.

[0078] Specifically, since the acoustic emission signal is transmitted from the port of the high-pressure gas cylinder to the acoustic signal receiver, and each acoustic signal receiver is distributed at a different position of the high-pressure gas cylinder, when the acoustic signal receiver receives an abnormal acoustic emission signal, the defect of the high-pressure gas cylinder must be between the acoustic signal receiver and the port of the high-pressure gas cylinder.

[0079] Specifically, steps S31 to S34 are applicable to the periodic inspection of high-pressure gas cylinders. Since it is necessary to use an acoustic emission source to generate acoustic emission signals inside and outside the port of the high-pressure gas cylinder, it cannot be performed when the high-pressure gas cylinder is in a working state. In order to perform real-time inspection on high-pressure gas cylinders that are found to be defective during periodic inspections, steps S35 to S37 can be executed.

[0080] S35: During the operation of the high-pressure gas storage cylinder, receiving the acoustic signal fed back by the acoustic signal receiver pre-distributed on the cylinder body of the high-pressure gas storage cylinder.

[0081] Specifically, during the operation of the high-pressure gas storage cylinder, the acoustic signal receiver pre-distributed on the cylinder body of the high-pressure gas storage cylinder can also be used to receive the acoustic signal generated on the cylinder body of the high-pressure gas storage cylinder.

[0082] S36: Determine whether a second difference between the acoustic signal and the pre-obtained stretching acoustic signal is within a preset second range;

[0083] S37: If the second difference exceeds the second range, it is determined that the high-pressure gas storage cylinder is defective.

[0084] Specifically, the tensile sound signal is obtained by pre-tensile testing a test block made of the same material as the high-pressure gas cylinder. A test block made of the same material as the body of the high-pressure gas cylinder is obtained in advance. The test block is equivalent to a piece cut from the body of the high-pressure gas cylinder. Therefore, the test block can accurately reflect the condition of the high-pressure gas cylinder. By pre-tensile testing the test block, the tensile sound signal generated by the test block under different tensile conditions is obtained, and the signal is used as a reference signal. In this way, by judging the sound signal and the tensile sound signal under the corresponding pressure state, it is possible to determine whether the current high-pressure gas cylinder has abnormal sound signals during normal operation, or whether there is a defect in the body of the high-pressure gas cylinder.

[0085] For example, a high-pressure gas cylinder composite material is fabricated into a rectangular test block of the same thickness as the cylinder, 20 cm long and 10 cm wide. The test block is placed in a tensile testing machine, secured at both ends, and two probes are placed symmetrically about the outer axis of the test block. The tensile testing machine is then operated, and the stress-strain curve of the material is recorded. Two acoustic emission signals corresponding to multiple points are recorded and averaged to establish a correlation between stress-strain and acoustic signals. If the acoustic signal received by the acoustic signal receiver remains stable and does not undergo sudden changes during the operation of the high-pressure gas cylinder, it indicates that the high-pressure hydrogen storage cylinder is in a safe operating state. If a sudden change in the acoustic signal is detected, this acoustic signal is compared with the tensile acoustic signal from the tensile test. If the two are close, for example, differing by no more than 2 dB within a preset second range, it is determined that a stress-strain relationship close to that observed in the tensile test exists near the detection point. This allows the stress-strain state of the high-pressure hydrogen storage cylinder to be determined. The safety status of the hydrogen storage cylinder can be determined based on the magnitude and duration of the real-time detected acoustic signal, enabling real-time online testing of high-pressure hydrogen storage cylinders.

[0086] It can be understood that this detection method is applicable to high-pressure hydrogen storage bottles.

[0087] Correspondingly, the present application also discloses a high-pressure gas cylinder detection device, see Figure 5 and Figure 6 As shown, the device includes: a base 3, a first gas cylinder gland 4, a second gas cylinder gland 5, and an acoustic signal receiver 2 distributed on the base 3, the first gas cylinder gland 4, and the second gas cylinder gland 5;

[0088] The upper surface of the base 3 is recessed and is provided with a plurality of acoustic signal receivers 2, so that when the high-pressure gas cylinder 1 is placed on the base 3, all the acoustic signal receivers 2 on the upper surface of the base 3 can fit in contact with the high-pressure gas cylinder 1. The base 3 includes a limiting device 31 to fix the position of the high-pressure gas cylinder 1 on the base 3;

[0089] The first gas cylinder gland 4 and the second gas cylinder gland 5 are rotatably connected to the base 3, respectively, so that when the first gas cylinder gland 4 and the second gas cylinder gland 5 are closed, the acoustic signal receiver 2 arranged on the inner surface of the first gas cylinder gland 4 and the second gas cylinder gland 5 can fit with the high-pressure gas cylinder 1 placed on the base 3;

[0090] The acoustic signal receiver 2 is used to receive the acoustic emission signal and the acoustic signal required in the aforementioned high-pressure gas cylinder 1 detection method.

[0091] Specifically, by respectively arranging a plurality of acoustic signal receivers 2 on the base 3, the first gas cylinder gland 4 and the second gas cylinder gland 5, after the high-pressure gas cylinder 1 is placed on the base 3 and the base 3, the first gas cylinder gland 4 and the second gas cylinder gland 5 are closed, the acoustic signal receiver 2 can be attached to the high-pressure gas cylinder 1, thereby detecting the acoustic emission signal or acoustic signal at each position. The position of the high-pressure gas cylinder 1 on the base 3 can be fixed by the limiting device 31 on the base 3, and the detection position of the acoustic signal receiver 2 can be fixed, ensuring that when performing the above-mentioned detection, the installation position of the acoustic signal receiver 2 of each high-pressure gas cylinder 1 can correspond one to one, thereby ensuring the detection accuracy.

[0092] It can be seen that the high-pressure gas cylinder detection device of the embodiment of the present application can ensure that each high-pressure gas cylinder 1 is placed in the same position through the limit device 31 on the base 3. At the same time, the acoustic signal receiver 2 on the base 3, the first gas cylinder gland 4, and the second gas cylinder gland 5 can detect the acoustic emission signal and acoustic signal required in the aforementioned high-pressure gas cylinder 1 detection method, thereby improving the accuracy of the detection process.

[0093] Specifically, the first gas cylinder gland 4 and the second gas cylinder gland 5 are connected to the base 3 via a movable hinge 6 .

[0094] Specifically, six acoustic signal receivers 2 are evenly distributed on the first gas cylinder gland 4, the second gas cylinder gland 5 and the base 3, respectively, so that signals from 18 positions in the front, middle and rear rows of the high-pressure gas cylinder 1 can be detected.

[0095] The above describes in detail the high-pressure gas cylinder inspection method and device provided in the embodiments of the present application. The various embodiments are described in a progressive manner throughout this specification, with each embodiment focusing on the differences from the other embodiments. Similar or identical parts between the various embodiments can be referenced for reference only. The device disclosed in the embodiments corresponds to the method disclosed in the embodiments, so the description is relatively brief. For relevant details, refer to the method description.

[0096] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0097] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0098] The above is a detailed introduction to the technical content provided by this application. Specific examples are used in this article to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for general technical personnel in this field, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting this application.

Claims

1. A high-pressure gas cylinder detection method, characterized in that: include: The acoustic signal receivers pre-distributed on the body of the high-pressure gas cylinder are used to receive multiple acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas cylinder to ensure that the sound source size is consistent; Comparing whether a first difference between the decibel value of the acoustic emission signal and a pre-obtained corresponding standard acoustic emission signal is within a preset first range; Wherein, the comparing whether the first difference between the decibel values ​​corresponding to the acoustic emission signal and the pre-obtained corresponding standard acoustic emission signal is within a preset first range includes: determining whether the difference between multiple acoustic emission signals meets a preset error requirement; if the error requirement is met, averaging the multiple acoustic emission signals generated at the same occurrence position to obtain an average acoustic emission signal; and comparing whether the first difference between the average acoustic emission signal and the pre-obtained corresponding standard acoustic emission signal is within the preset first range; If the first difference exceeds the first range, it is determined that the high-pressure gas storage cylinder has a defect; Wherein, the standard acoustic emission signal is an acoustic emission signal pre-measured at the same position of a qualified high-pressure gas storage cylinder; After determining that the high-pressure gas cylinder has no defects in the periodic inspection, real-time inspection is performed on the high-pressure gas cylinder that has no defects in the periodic inspection, including: receiving the sound signal fed back by the sound signal receiver pre-distributed on the body of the high-pressure gas cylinder during the operation of the high-pressure gas cylinder that has no defects in the periodic inspection; if the sound signal does not undergo a sudden change, determining that the high-pressure gas cylinder that has no defects in the periodic inspection is in a safe state; if the sound signal undergoes a sudden change, determining whether a second difference between the decibel value corresponding to the sound signal and the pre-obtained tensile sound signal is within a preset second range; if the second difference exceeds the second range, determining that the high-pressure gas cylinder that has no defects in the periodic inspection has defects in the real-time inspection; wherein, the tensile sound signal is obtained by pre-tensile testing a test block made of the same material as the high-pressure gas cylinder.

2. The high-pressure gas cylinder detection method according to claim 1, characterized in that: The process of using the acoustic signal receivers pre-distributed on the body of the high-pressure gas storage cylinder to receive the acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas storage cylinder includes: 18 acoustic signal receivers uniformly distributed on the body of the high-pressure gas storage cylinder are used to receive the acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas storage cylinder.

3. The high-pressure gas cylinder detection method according to claim 2, characterized in that: The process of using 18 acoustic signal receivers uniformly distributed in advance on the body of the high-pressure gas storage cylinder to receive the acoustic emission signals generated by the acoustic emission sources on both sides of the port of the high-pressure gas storage cylinder includes: 18 acoustic signal receivers uniformly distributed on the body of the high-pressure gas cylinder are used to receive acoustic emission signals generated by the lead breaking operation on both sides of the port of the high-pressure gas cylinder.

4. The high-pressure gas cylinder detection method according to any one of claims 1 to 3, characterized in that: After the first difference exceeds the first range, the method further includes: The location range of the defect point is determined by using the position information between the acoustic signal receiver that detects the acoustic emission signal and the acoustic emission source.

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