Leakage detection system and method for high-pressure cylinder valve

Abstract

A leakage detection system of a high-pressure cylinder valve comprises a detection box defining a detection space suitable for the arrangement of the high-pressure cylinder valve, an environment regulation and control unit connected with the detection box, and a detection unit. The environment regulation and control unit comprises a temperature control part used for controlling the temperature of the detection space, a pressure control part suitable for applying pressure to the high-pressure cylinder valve, and a control module in information connection with the temperature control part and the pressure control part. The detection unit comprises a wave detection part which is arranged in the detection space and is suitable for detecting target sound waves emitted by the high-pressure cylinder valve, a data acquisition module which is in information connection with the wave detection part and is used for receiving the target sound waves, and a data analysis module which is in information connection with the data acquisition module and is used for analyzing the target sound waves. The invention also provides a leakage detection method of the high-pressure cylinder valve.

Description

Technical Field

[0001] The present invention relates to a detection system and method thereof, and particularly to a leakage detection system and method for a high-pressure bottle valve. Background Art

[0002] Due to its high energy density and relatively environmentally friendly characteristics, hydrogen energy has been booming in the field of energy applications. However, the use of hydrogen energy must rely on the stable storage and transportation of hydrogen. In recent years, accidental fires have frequently occurred due to abnormalities in various valve components between the hydrogen storage and transportation paths, which further highlights the importance of regular inspection and maintenance of each valve component. Among them, in order to maintain the normal function of the valve components and considering the flammable characteristics of hydrogen, it is necessary to use non-destructive detection techniques.

[0003] Acoustic emission detection technology is a non-destructive detection technology that can be applied to online and offline valve leakage detection. It mainly uses the principle that when internal structural changes such as cracking and structural fracture occur in a specific component, sound waves will be emitted due to the redistribution of internal stress. According to the presence or absence of specific frequency sound waves, it is judged whether there is internal damage to the target detection component. In the existing acoustic emission detection technology, usually only specific damage caused by a single environmental condition can be detected. Taking the environmental condition of "pressure" as an example, the detection method is to first apply a gradually increasing pressure to the target high-pressure bottle valve until the high-pressure bottle valve reaches the critical pressure and bursts, emitting a specific sound. Subsequently, the specific audio can be used to determine whether high-pressure bottle valves of the same specification are normal. However, this detection method can only detect valve abnormalities caused by pressure higher than the critical value. If the high-pressure bottle valve leaks simply due to structural aging during long-term use under a fixed pressure, no audio with similar characteristics will be generated, and thus such situations cannot be effectively detected. Summary of the Invention

[0004] The purpose of the present invention is to provide a leakage detection system and method for a high-pressure bottle valve that can use acoustic emission technology to monitor more diverse environmental conditions and damage situations.

[0005] The leakage detection system for a high-pressure bottle valve of the present invention includes a detection box that defines a detection space suitable for setting the high-pressure bottle valve, an environmental control unit connected to the detection box, and a detection unit.

[0006] The environmental control unit includes a temperature control component arranged in the detection box and used to control the temperature of the detection space, a pressure control component communicated with the detection space and suitable for applying pressure to the high-pressure bottle valve, and a control module information-connected to the temperature control component and the pressure control component.

[0007] The detection unit includes at least one detector disposed in the detection space and adapted to detect a target sound wave emitted by the high-pressure bottle valve, a data acquisition module information-connected to the detector and used to receive the target sound wave, and a data analysis module information-connected to the data acquisition module and used to analyze the target sound wave.

[0008] The object of the present invention and the technical problems to be solved can be further achieved by the following technical measures.

[0009] Preferably, in the leakage detection system of the aforementioned high-pressure bottle valve, the pressure control member of the environmental control unit has a fluid supply tank for storing a pressure-regulating fluid and a pressure pump connected between the fluid supply tank and the high-pressure bottle valve.

[0010] Preferably, in the leakage detection system of the aforementioned high-pressure bottle valve, at least one detector of the detection unit is selected from a microphone, an accelerometer, or any combination thereof.

[0011] The leakage detection method of the high-pressure bottle valve of the present invention includes a preparation step, a control step, an acquisition step, and an analysis step.

[0012] The preparation step is to prepare the leakage detection system of the high-pressure bottle valve of the present invention.

[0013] The control step is to use the environmental control unit to control the temperature parameter of the detection space, the pressure parameter of the high-pressure bottle valve, and the time parameter for maintaining the temperature parameter and the pressure parameter.

[0014] The acquisition step is to detect, through the detector of the detection unit, the target sound wave generated by the high-pressure bottle valve under the temperature parameter, the pressure parameter, and the time parameter.

[0015] The analysis step is to acquire the audio characteristics of the target sound wave by the data acquisition module and analyze the audio characteristics by the data analysis module to generate detection data for subsequent detection.

[0016] Another leakage detection method of the high-pressure bottle valve of the present invention includes a detection step and a processing step.

[0017] The detection step is to detect the sound signal generated by the high-pressure bottle valve using at least one detector.

[0018] The processing step is to compare the sound signal with the detection data obtained by the previous leakage detection method of the high-pressure bottle valve of the present invention through at least one of the data acquisition module and the data analysis module.

[0019] Preferably, in the foregoing method for detecting leakage of a high-pressure cylinder valve, in the detecting step, a noise reduction sub-step is included, and in the noise reduction sub-step, an external noise reduction member is used to absorb or reduce the noise around the at least one wave detector.

[0020] Preferably, in the foregoing method for detecting leakage of a high-pressure cylinder valve, in the processing step, a noise reduction sub-step is included, and in the noise reduction sub-step, noise reduction processing is performed on the sound signal in at least one of the data acquisition module and the data analysis module.

[0021] Preferably, in the foregoing method for detecting leakage of a high-pressure cylinder valve, at least one wave detector of the detecting unit is selected from a microphone, an accelerometer, or any combination thereof.

[0022] The beneficial effects of the present invention are as follows: for various situations where the high-pressure cylinder valve may leak, the environmental control unit can properly set the temperature parameter, the pressure parameter, and the time parameter, thereby using the detection unit to obtain the target sound wave when the high-pressure cylinder valve leaks, and after proper analysis by the data analysis module, obtaining the detection data for subsequent acoustic emission detection. As long as the detection data is used, subsequent more appropriate and comprehensive detection of high-pressure cylinder valves of the same specification can be performed in response to more diverse environmental conditions and different damage situations. Description of the Drawings

[0023] Figure 1 is a system configuration diagram illustrating a system embodiment of the leakage detection system for a high-pressure cylinder valve of the present invention;

[0024] Figure 2 is a block flow chart illustrating a method embodiment of the method for detecting leakage of a high-pressure cylinder valve of the present invention; and

[0025] Figure 3 is a block flow chart illustrating a detection embodiment of the method for detecting leakage of a high-pressure cylinder valve of the present invention. Detailed Description of the Embodiments

[0026] The present invention will be described in detail below with reference to the drawings and embodiments.

[0027] Refer to Figure 1 , which is a system embodiment of the leakage detection system for a high-pressure cylinder valve of the present invention, and is applicable to detecting a to-be-detected cylinder valve 9. This system embodiment includes a detection box 1 defining a detection space 100 suitable for placing the to-be-detected cylinder valve 9, an environmental control unit 2 connected to the detection box 1, and a detection unit 3 installed in the detection box 1.

[0028] The environmental control unit 2 includes a temperature control member 21 disposed in the detection box 1 and used to control the temperature of the detection space 100, a pressure control member 22 connected to the detection space 100 and suitable for applying pressure to the bottle valve 9 to be detected, and a control module 23 connected to the temperature control member 21 and the pressure control member 22 for controlling the operation of the temperature control member 21 and the pressure control member 22. Among them, the temperature control member 21 can specifically be a heater, a refrigeration chip, or even an air conditioning system, as long as it can cooperate with the control module 23 to accurately perform temperature adjustment according to the requirements of heating and cooling. The pressure control member 22 has a fluid supply tank 221 for storing a pressure regulating fluid, and a pressure pump 222 connected between the fluid supply tank 221 and the bottle valve 9 to be detected and used to control the delivery of the pressure regulating fluid toward the bottle valve 9 to be detected. The control module 23 is a controller that has pre-written control commands for the temperature control member 21 and the pressure control member 22, thereby adjusting the temperature control member 21 and the pressure control member 22 to make the detection space 100 present the expected temperature conditions and keep the bottle valve 9 to be detected under specific pressure conditions. In addition, the control module 23 can further control according to time conditions, thereby introducing variable conditions of time parameters.

[0029] The detection unit 3 includes two detection members 31 disposed in the detection space 100 and suitable for detecting a target sound wave emitted by the bottle valve 9 to be detected, a data acquisition module 32 connected to the detection members 31 for receiving the target sound wave, and a data analysis module 33 connected to the data acquisition module 32 for analyzing the target sound wave. Specifically, the detection members 31 are selected from microphones or accelerometers, and here, each detection member 31 is a microphone that can receive sound signals as an example for illustration. The data acquisition module 32 specifically removes unnecessary noises such as background sounds and ambient sounds through signal processing, extracts a part of the information in the target sound wave for subsequent analysis, and supplies it to the data analysis module 33 to further analyze the waveform signal of the target sound wave.

[0030] Refer to Figure 2 , which is a method embodiment of the leakage detection method for the high-pressure bottle valve of the present invention. The method embodiment includes a preparation step 51, a control step 52, a capture step 53, and an analysis step 54. Refer to Figure 2 And cooperate with Figure 1 , the preparation step 51 is to prepare the system embodiment of the leakage detection system for the high-pressure bottle valve of the present invention to use the system embodiment to detect the bottle valve 9 to be detected.

[0031] The control step 52 is to use the environmental control unit 2 to control a temperature parameter of the detection space 100, a pressure parameter of the bottle valve 9 to be detected, and a time parameter for maintaining the temperature parameter and the pressure parameter. Specifically, the control step 52 is to use the control module 23 of the environmental control unit 2 to control the operation of the temperature control member 21 and the pressure control member 22, so that the bottle valve 9 to be detected can be in a preset environmental condition to simulate various actual use scenarios.

[0032] It is particularly worth noting that, compared with the situation of rapidly increasing the pressure to the critical pressure as described in the prior art, the control step 52 can also simulate the situation of the bottle valve 9 to be detected under specific temperature and pressure conditions in a relatively long time by controlling the variable of time, so as to be as close as possible to the actual use situation. In addition, by changing the temperature parameter, the pressure parameter, and the time parameter, countless permutations and combinations can be used to simulate various use scenarios under multi-parameter variables. For example, the temperature condition can adopt the test temperature (-40°C to 80°C) specified by the general standard test method.

[0033] The extraction step 53 is to use the detector 31 of the detection unit 3 to detect a target sound wave generated by the internal structure change of the bottle valve 9 to be detected under the default temperature parameter, pressure parameter, and time parameter due to corresponding specific damage, air leakage, etc. Thus, the detector 31 can be used to detect the sound signal generated when the bottle valve 9 to be detected is damaged, leaks air, etc. under specific conditions. Taking the test temperature of the aforementioned general standard test method as an example, the leakage audio of the bottle valve 9 to be detected under various temperature conditions can be measured at this time.

[0034] The analysis step 54 is to use the data extraction module 32 to extract an audio feature of the target sound wave, and use the data analysis module 33 to analyze the audio feature to generate a detection data for subsequent detection. So far, in the analysis step 54, for the bottle valve 9 to be detected under specific temperature, pressure, and time conditions, the audio feature generated when damage, air leakage, etc. occur is obtained. Therefore, whether it is online or offline for the same specification of the bottle valve 9 to be detected for the same detection in the future, the detection data can be used as a reference. Furthermore, after obtaining more detection data for various environmental conditions using the embodiment of this method, the detection requirements for all situations can be more comprehensively met for high-pressure bottle valves of the same specification as the bottle valve 9 to be detected.

[0035] Refer to Figure 3 And cooperate with Figure 1, which is a detection embodiment for the leakage detection of the high-pressure bottle valve of the present invention. The detection embodiment includes a detection step 61 and a processing step 62. Specifically, when actually performing leakage detection on a specific high-pressure bottle valve subsequently, first, through the detection step 61, a sound signal generated by the high-pressure bottle valve is detected using the detector 31. Then, in cooperation with at least one of the data acquisition module 32 and the data analysis module 33, the previously obtained detection data can be compared with the sound signal to accurately detect whether the high-pressure bottle valve is damaged or leaking.

[0036] It is particularly worth noting that in order to further improve the detection accuracy, for the environmental noise at the application site, a noise reduction sub-step 611, 621 can be further performed in the detection step 61 or the processing step 62. By confirming the differences in the characteristics of the leakage sound, such as amplitude and frequency, from the surrounding environmental noise, the audio characteristics of the detected high-pressure bottle valve can be more clearly identified. Among them, noise reduction can be achieved through active noise reduction, passive noise reduction, or even a combination of both. For example, if the noise reduction sub-step 611 is performed in the detection step 61, an external noise reduction component is used to isolate the background noise and absorb or reduce the noise signal received by the detector 31; if the noise reduction sub-step 621 is performed in the processing step 62, the data acquisition module 32 or the data analysis module 33 is directly used to perform noise reduction processing to filter out the background noise signal in the sound signal or enhance the audio of the target sound wave, thereby achieving the purpose of more accurate identification.

Claims

1. A leakage detection system for a high-pressure cylinder valve, characterized in that: The leakage detection system for the high-pressure cylinder valve includes: A detection box defining a detection space suitable for arranging the high-pressure cylinder valve; An environmental control unit connected to the detection box, and including a temperature control member arranged in the detection box and used for controlling the temperature of the detection space, a pressure control member communicated with the detection space and suitable for applying pressure to the high-pressure cylinder valve, and a control module information-connected to the temperature control member and the pressure control member; and A detection unit including at least one wave detection member arranged in the detection space and suitable for detecting a target sound wave emitted by the high-pressure cylinder valve, a data acquisition module information-connected to the wave detection member and used for receiving the target sound wave, and a data analysis module information-connected to the data acquisition module and used for analyzing the target sound wave.

2. The leakage detection system for a high-pressure cylinder valve according to claim 1, characterized in that: The pressure control member of the environmental control unit has a fluid supply tank for storing a pressure-regulating fluid, and a pressure pump communicated between the fluid supply tank and the high-pressure cylinder valve.

3. The leakage detection system for a high-pressure cylinder valve according to claim 1, characterized in that: At least one wave detection member of the detection unit is selected from a microphone, an accelerometer, or any combination thereof.

4. A leakage detection method for a high-pressure cylinder valve, characterized in that: The leakage detection method for the high-pressure cylinder valve includes: A preparation step of preparing a leakage detection system for a high-pressure cylinder valve according to any one of claims 1 to 3; A control step of using the environmental control unit to control the temperature parameter of the detection space, the pressure parameter of the high-pressure cylinder valve, and the time parameter for maintaining the temperature parameter and the pressure parameter; An acquisition step of detecting a target sound wave generated by the high-pressure cylinder valve under the temperature parameter, the pressure parameter, and the time parameter through the wave detection member of the detection unit; and An analysis step of acquiring the audio characteristics of the target sound wave by the data acquisition module and analyzing the audio characteristics by the data analysis module to generate detection data for subsequent detection.

5. A leakage detection method for a high-pressure cylinder valve, characterized in that: The leakage detection method for the high-pressure cylinder valve includes: A detection step of using at least one wave detection member to detect a sound signal generated by the high-pressure cylinder valve; and A processing step of comparing the sound signal with the detection data obtained by the leakage detection method for a high-pressure cylinder valve according to claim 4 through at least one of the data acquisition module and the data analysis module according to claim 4.

6. The leakage detection method for a high-pressure cylinder valve according to claim 5, characterized in that: The detection step includes a noise reduction sub-step of using an external noise reduction member to absorb or reduce the noise around the at least one wave detection member.

7. The leakage detection method for a high-pressure cylinder valve according to claim 5, characterized in that: The processing step includes a noise reduction sub-step of performing noise reduction processing on the sound signal in at least one of the data acquisition module and the data analysis module.

8. The leakage detection method of a high-pressure cylinder valve according to claim 5, characterized in that: at least one detection element of the detection unit is selected from a microphone, an accelerometer, or any combination thereof.

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