Hydrogen storage cylinder detection method based on pulse echo method
Through the hydrogen storage cylinder detection method based on the pulse echo method, a 360-degree circumference scan and multi-height scan are performed using a mechanical positioning device, which solves the problem that the existing technology is difficult to detect internal defects of the hydrogen storage cylinder, and achieves efficient and accurate detection effects, reducing costs and risks.
Patent Information
- Application Number
- CN202510106509.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-05-06
AI Technical Summary
The existing hydrogen storage cylinder detection methods are difficult to effectively detect defects such as damage to the composite material matrix and interface layering inside the cylinder, resulting in high detection costs and difficult to detect.
Using a detection method based on the pulse echo method, the transducer is gradually moved and lifted through a mechanical positioning device, and a 360-degree circumferential scanning and multi-height scanning are performed, and the circumferential array waveform data is collected and the position of the cylinder defect is judged by the attenuation change of the ultrasonic signal.
It improves the accuracy and efficiency of testing, reduces labor costs and risks during the testing process, provides strong guarantees for the safe operation of hydrogen storage cylinders, and promotes the healthy development of the hydrogen energy industry.
Smart Images
Figure CN119936192A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of special equipment detection, and in particular to a hydrogen storage cylinder detection method based on a pulse echo method. Background Art
[0002] At present, with the advancement of renewable energy technology, hydrogen energy, as a clean energy carrier, has gradually received attention. Hydrogen storage cylinders are important equipment for hydrogen storage and transportation, usually storing hydrogen in high pressure form; the safety of hydrogen storage cylinders directly affects the safety and efficiency of hydrogen energy use, so it is particularly important to carry out defect detection of hydrogen storage cylinders.
[0003] Among them, hydrogen storage cylinder inspection mainly uses endoscopes or leak detectors to detect surface defects, and the generation of internal defects in hydrogen storage cylinders is often the main factor leading to cylinder failure, especially defects such as composite material matrix damage and interface stratification in hydrogen storage cylinders.
[0004] In the prior art, the main methods for detecting internal defects are X-ray detection and ultrasonic detection. Although X-ray detection technology is effective, its operation is complicated and there are potential risks to the environment and personnel health. The pulse echo method, as an ultrasonic detection method, uses the propagation characteristics of sound waves in materials to effectively detect internal defects of gas cylinders. Specifically, the pulse echo method can identify internal defects such as cracks, bubbles, corrosion and delamination by sending short pulse sound waves and analyzing the echo signals. In addition, the pulse echo method has the advantages of high sensitivity, rapid response, real-time monitoring, etc., and can work reliably in a variety of complex environments.
[0005] Therefore, how to provide a hydrogen storage cylinder detection method based on the pulse echo method, which can not only effectively improve the accuracy and efficiency of detection, but also effectively reduce the labor cost and risk in the detection process, has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention
[0006] The purpose of the present invention is to provide a hydrogen storage cylinder detection method based on the pulse echo method, which is used to solve the technical problems of high detection cost and difficulty in detection caused by defects such as composite material matrix damage and interface stratification in existing hydrogen storage cylinders.
[0007] In order to achieve the above object, the present invention adopts the following technical scheme: A method for detecting a hydrogen storage cylinder based on a pulse echo method comprises the following steps: Step S1, using a clamping device and a level to vertically clamp and fix the hydrogen storage cylinder to be tested; Step S2, leveling the hydrogen storage cylinder and determining the center position of the circle to ensure that the center of the hydrogen storage cylinder is consistent with the rotation center of the mechanical positioning device; Step S3, constructing a scanning device, clamping the transducer with a mechanical positioning device, and aligning the initial position of the transducer with the bottom of the hydrogen storage cylinder; Step S4, gradually moving the transducer by a mechanical positioning device, each time increasing the central angle by 1°, and performing 360 data acquisitions to form array waveform data of circular scanning; Step S5, raising the transducer to a height of half the transducer width by a mechanical positioning device, and repeating step S4 until the entire surface of the hydrogen storage cylinder is scanned; Step S6: process all array waveform data, and determine the location of defects in the hydrogen storage cylinder by attenuation of multiple echoes of the ultrasonic signal.
[0008] In practical application, the mechanical positioning device includes four axes, three of which are spatial xyz axes that can move linearly, and the other axis is an R axis that can rotate freely 360°; Among them, the xy axis is used to align the center of the hydrogen storage cylinder with the center of the hydrogen storage cylinder to keep the center of the hydrogen storage cylinder consistent with the center of the rotation axis, the rotation axis R axis is used to clamp the transducer to scan the hydrogen storage cylinder to obtain circular array data, and the z axis is used to adjust the height of the transducer.
[0009] Specifically, the step S2 comprises the following steps: Use a mechanical positioning device to clamp the dial indicator, and make the measuring head of the dial indicator touch the surface of the hydrogen storage cylinder. Then, program the mechanical positioning device to make the dial indicator rotate one circle along the surface of the hydrogen storage cylinder. If the numerical range of the dial indicator is greater than 0.3 mm, adjust the xy axis of the mechanical positioning device to make the center of the rotating axis closer to the center of the hydrogen storage cylinder, and rotate the dial indicator along the surface of the hydrogen storage cylinder again until the numerical range of the dial indicator is less than 0.3 mm.
[0010] Furthermore, the step S4 specifically includes the following steps: Every time the transducer moves, the mechanical positioning device generates an external trigger signal to control the pulse generator to generate an excitation signal and stimulate the ultrasonic transducer to emit ultrasonic waves. After the ultrasonic transducer receives the ultrasonic echo signal from the hydrogen storage cylinder, it amplifies the signal through the preamplifier, and then connects the amplified signal to the oscilloscope for storage, and uses a computer to post-process the data.
[0011] Compared with the prior art, the hydrogen storage cylinder detection method based on the pulse echo method described in the present invention has the following advantages: In the hydrogen storage cylinder detection method based on the pulse echo method provided by the present invention, the hydrogen storage cylinder to be tested is first clamped and fixed vertically, leveled and its center position is determined to ensure that the ultrasonic transducer is always perpendicular to the surface of the cylinder during the rotation process; during the measurement process, the transducer transmits and receives ultrasonic waves vertically to the cylinder, and the transducer is gradually moved by a mechanical positioning device, each time increasing by 1° of the center angle, and 360 data acquisitions are performed to form an array waveform data of a circular scan; then, the height position of the transducer on the cylinder is changed, and a circle scan is performed again until all detectable parts are scanned; finally, the collected data is input into a computer for post-processing, and the position of the defect in the cylinder is determined by the attenuation change of the ultrasonic signal. From this analysis, it can be seen that the hydrogen storage cylinder detection method based on the pulse echo method provided by the present invention can not only effectively improve the accuracy and efficiency of the detection, but also effectively reduce the labor cost and risk in the detection process; in addition, it can provide a strong guarantee for the safe operation of hydrogen storage cylinders and promote the healthy development of the hydrogen energy industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 A schematic flow chart of a hydrogen storage cylinder detection method based on a pulse echo method provided in an embodiment of the present invention; Figure 2 A schematic structural diagram of a hydrogen storage cylinder detection device based on a pulse echo method provided in an embodiment of the present invention. DETAILED DESCRIPTION
[0013] For ease of understanding, the hydrogen storage cylinder detection method based on the pulse echo method provided in an embodiment of the present invention is described in detail below in conjunction with the accompanying drawings of the specification.
[0014] The embodiment of the present invention provides a hydrogen storage cylinder detection method based on the pulse echo method, such as Figure 1 and Figure 2 As shown, the following steps are included: Step S1, using a clamping device and a level to vertically clamp and fix the hydrogen storage cylinder to be tested; Step S2, leveling the hydrogen storage cylinder and determining the center position of the circle to ensure that the center of the hydrogen storage cylinder is consistent with the rotation center of the mechanical positioning device; Step S3, constructing a scanning device, clamping the transducer with a mechanical positioning device, and aligning the initial position of the transducer with the bottom of the hydrogen storage cylinder; Step S4, gradually moving the transducer by a mechanical positioning device, each time increasing the central angle by 1°, and performing 360 data acquisitions to form array waveform data of circular scanning; Step S5, raising the transducer to a height of half the transducer width by a mechanical positioning device, and repeating step S4 until the entire surface of the hydrogen storage cylinder is scanned; Step S6: process all array waveform data, and determine the location of defects in the hydrogen storage cylinder by attenuation of multiple echoes of the ultrasonic signal.
[0015] Compared with the prior art, the hydrogen storage cylinder detection method based on the pulse echo method described in the embodiment of the present invention has the following advantages: In the hydrogen storage cylinder detection method based on the pulse echo method provided by the embodiment of the present invention, the hydrogen storage cylinder to be tested is first clamped and fixed vertically, leveled and its center position is determined to ensure that the ultrasonic transducer is always perpendicular to the surface of the cylinder during the rotation process; during the measurement process, the transducer transmits and receives ultrasonic waves vertically to the cylinder, and the transducer is gradually moved by a mechanical positioning device, each time increasing by 1° of the center angle, and 360 data acquisitions are performed to form an array waveform data of a circular scan; then, the height position of the transducer on the cylinder is changed, and a scan is performed again until all detectable parts are scanned; finally, the collected data is input into a computer for post-processing, and the position of the defect in the cylinder is determined by the attenuation change of the ultrasonic signal. From this analysis, it can be seen that the hydrogen storage cylinder detection method based on the pulse echo method provided by the embodiment of the present invention can not only effectively improve the accuracy and efficiency of detection, but also effectively reduce the labor cost and risk in the detection process; in addition, it can provide a strong guarantee for the safe operation of hydrogen storage cylinders and promote the healthy development of the hydrogen energy industry.
[0016] In practical application, the mechanical positioning device may include four axes, three of which are spatial xyz axes that can move linearly, and the other axis is an R axis that can rotate freely 360°; Among them, the xy axis is used to align the center of the hydrogen storage cylinder with the center of the circle so that the center of the hydrogen storage cylinder is consistent with the center of the rotation axis. The rotating axis R axis is used to clamp the transducer to scan the hydrogen storage cylinder to obtain circular array data. The z axis is used to adjust the height of the transducer, thereby effectively obtaining ultrasonic data at different heights of the hydrogen storage cylinder.
[0017] Specifically, the above step S2 may include the following steps: Use a mechanical positioning device to clamp the dial indicator, and make the measuring head of the dial indicator touch the surface of the hydrogen storage cylinder. Then, program the mechanical positioning device to make the dial indicator rotate one circle along the surface of the hydrogen storage cylinder. If the numerical range of the dial indicator is greater than 0.3 mm, adjust the xy axis of the mechanical positioning device to make the center of the rotating axis closer to the center of the hydrogen storage cylinder, and rotate the dial indicator along the surface of the hydrogen storage cylinder again until the numerical range of the dial indicator is less than 0.3 mm.
[0018] Furthermore, the above step S4 may specifically include the following steps: Each time the transducer moves, the mechanical positioning device generates an external trigger signal to control the pulse generator to generate an excitation signal and excite the ultrasonic transducer to emit ultrasonic waves. After the ultrasonic transducer receives the ultrasonic echo signal from the hydrogen storage cylinder, it amplifies the signal through the preamplifier, and then connects the amplified signal to the oscilloscope for storage, and uses a computer to post-process the data, such as Figure 2 shown.
[0019] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A hydrogen storage cylinder detection method based on pulse echo method, characterized in that: The following steps are involved: Step S1, using a clamping device and a level to vertically clamp and fix the hydrogen storage cylinder to be tested; Step S2, leveling the hydrogen storage cylinder and determining the center position of the circle to ensure that the center of the hydrogen storage cylinder is consistent with the rotation center of the mechanical positioning device; Step S3, constructing a scanning device, clamping the transducer with a mechanical positioning device, and aligning the initial position of the transducer with the bottom of the hydrogen storage cylinder; Step S4, gradually moving the transducer by a mechanical positioning device, each time increasing the central angle by 1°, and performing 360 data acquisitions to form array waveform data of circular scanning; Step S5, raising the transducer to a height of half the transducer width by a mechanical positioning device, and repeating step S4 until the entire surface of the hydrogen storage cylinder is scanned; Step S6: process all array waveform data, and determine the location of defects in the hydrogen storage cylinder by attenuation of multiple echoes of the ultrasonic signal.
2. The hydrogen storage cylinder detection method based on pulse echo method according to claim 1 is characterized in that: The mechanical positioning device includes four axes, three of which are spatial xyz axes that can move linearly, and the other axis is an R axis that can rotate freely 360°; Among them, the xy axis is used to align the center of the hydrogen storage cylinder with the center of the hydrogen storage cylinder to keep the center of the hydrogen storage cylinder consistent with the center of the rotation axis, the rotation axis R axis is used to clamp the transducer to scan the hydrogen storage cylinder to obtain circular array data, and the z axis is used to adjust the height of the transducer.
3. The hydrogen storage cylinder detection method based on pulse echo method according to claim 2 is characterized in that: The step S2 specifically includes the following steps: Use a mechanical positioning device to clamp the dial indicator, and make the measuring head of the dial indicator touch the surface of the hydrogen storage cylinder. Then, program the mechanical positioning device to make the dial indicator rotate one circle along the surface of the hydrogen storage cylinder. If the numerical range of the dial indicator is greater than 0.3 mm, adjust the xy axis of the mechanical positioning device to make the center of the rotating axis closer to the center of the hydrogen storage cylinder, and make the dial indicator rotate one circle along the surface of the hydrogen storage cylinder again until the numerical range of the dial indicator is less than 0.3 mm.
4. The hydrogen storage cylinder detection method based on pulse echo method according to claim 3 is characterized in that: The step S4 specifically comprises the following steps: Every time the transducer moves, the mechanical positioning device generates an external trigger signal to control the pulse generator to generate an excitation signal and stimulate the ultrasonic transducer to emit ultrasonic waves. After the ultrasonic transducer receives the ultrasonic echo signal from the hydrogen storage cylinder, it amplifies the signal through the preamplifier, and then connects the amplified signal to the oscilloscope for storage, and uses a computer to post-process the data.