A hydrogen-sensitive tape effectiveness verification system and method

Abstract

This invention discloses a system and method for verifying the effectiveness of hydrogen-sensitive tape. It includes a high-low temperature environment chamber, within which is a hydrogen-contaminated environment chamber. The hydrogen-contaminated environment chamber has a transparent observation port and a support device. A standard gas cylinder is connected to the hydrogen-contaminated environment chamber via an inlet pipe. An outlet pipe is located on the side wall of the hydrogen-contaminated environment chamber. An inlet valve is located on the inlet pipe, and an outlet valve is located on the outlet pipe. A first hydrogen concentration sensor, a pressure sensor, and a humidity sensor are located on the side wall of the hydrogen-contaminated environment chamber. A humidifier is located inside the hydrogen-contaminated environment chamber. A video recording device is located in the high-low temperature environment chamber. The first hydrogen concentration sensor, pressure sensor, humidity sensor, humidifier, and video recording device are all connected to a control system. A vacuum pump is connected to the hydrogen-contaminated environment chamber via a suction pipe. The system provided by this invention can verify the reliability of hydrogen leakage detection of hydrogen-sensitive tape, explore the color-changing performance of hydrogen-sensitive tape under different environmental conditions, and is simple and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of hydrogen-sensitive tape testing systems, and in particular to a system and method for verifying the effectiveness of hydrogen-sensitive tape. Background Technology

[0002] Hydrogen energy boasts high calorific value, high energy density, low carbon footprint, environmental friendliness, renewability, and abundant reserves, making it an ideal secondary energy source. However, hydrogen is flammable and explosive, and its hydrogen embrittlement effect can easily lead to material failure and leaks. Hydrogen production plants and refueling stations contain numerous hydrogen pipelines, connectors, valves, and other components. To ensure the safety of hydrogen energy applications, leak detection in these areas is crucial. Currently, leak detection at refueling stations primarily relies on fixed hydrogen sensors or manual inspections. Fixed hydrogen sensors are not timely in open spaces and lack accuracy for detecting minute leaks. Manual inspections can identify minor leaks, but they typically use handheld hydrogen sensors to check leak-prone areas, resulting in low efficiency and a high risk of missed or false detections. Hydrogen-sensitive tape reacts chemically with hydrogen, changing color upon contact. Applying this tape to leak-prone areas allows for rapid identification of the leak source, significantly improving the efficiency and accuracy of leak detection.

[0003] As a highly efficient and accurate hydrogen leak detection tool, hydrogen-sensitive tape has been widely used in the hydrogen energy field, especially in hydrogen refueling stations. Current research on hydrogen-sensitive tape mainly focuses on its preparation methods and hydrogen leak detection systems based on it. However, there is limited research on verifying the effectiveness of hydrogen-sensitive tape after contact with hydrogen gas. To verify the reliability of hydrogen leak detection using hydrogen-sensitive tape and to explore its color-changing properties under different environmental conditions (hydrogen concentration, ambient temperature, etc.), this invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a system and method for verifying the effectiveness of hydrogen-sensitive tape. This system and method can verify the reliability of hydrogen leakage detection of hydrogen-sensitive tape and explore the color-changing performance of hydrogen-sensitive tape under different environmental conditions.

[0005] This invention provides a hydrogen-sensitive tape effectiveness verification system, comprising a high-low temperature environment chamber, within which is a hydrogen-contaminated environment chamber. The hydrogen-contaminated environment chamber has a transparent observation port and a support device. A standard gas cylinder containing standard gas is located outside the high-low temperature environment chamber. The standard gas cylinder contains hydrogen gas at a concentration meeting specific experimental requirements. The standard gas cylinder is connected to the hydrogen-contaminated environment chamber via an inlet pipe. The side wall of the hydrogen-contaminated environment chamber has an outlet pipe communicating with the external environment. An inlet valve is provided on the inlet pipe, and an outlet valve is provided on the outlet pipe.

[0006] The hydrogen-environment chamber is equipped with a first hydrogen concentration sensor, a pressure sensor, and a humidity sensor on its side wall; a humidifier is installed inside the hydrogen-environment chamber; a video recording device is installed in the high and low temperature environment chamber; the first hydrogen concentration sensor, the pressure sensor, the humidity sensor, the humidifier, and the video recording device are all connected to the control system.

[0007] The intake pipe is also equipped with a pressure reducing valve and a flow controller, both of which are connected to the control system.

[0008] It also includes a vacuum pump located outside the high and low temperature environment chamber, which is connected to the hydrogen-rich environment chamber via a suction pipe, and the suction pipe is equipped with a suction valve.

[0009] Furthermore, the support device includes a support base, the support base is provided with a receiving cavity, the receiving cavity is provided with an adhesive plate, the adhesive plate is used to fix the hydrogen-sensitive tape to be tested, and the adhesive plate is provided with a through hole.

[0010] Furthermore, the center of the through hole coincides with the center of the adhesive plate.

[0011] Furthermore, the diameter of the through hole is smaller than the width of the hydrogen-sensitive tape to be tested.

[0012] Furthermore, the system includes multiple support devices, and hydrogen-sensitive tape on all of the support devices can be observed through the transparent viewing port.

[0013] Furthermore, a temperature sensor and a second hydrogen concentration sensor are provided on the side wall of the high and low temperature environment chamber, and both the temperature sensor and the second hydrogen concentration sensor are connected to the control system.

[0014] This invention provides a method for verifying the effectiveness of hydrogen-sensitive tape using the above-described system, comprising the following steps:

[0015] S1. Place the hydrogen-sensitive tape to be tested on the support device, and close the hydrogen-contaminated environment chamber and the high-low temperature environment chamber;

[0016] S2. Connect the corresponding standard gas cylinder to the gas inlet pipe according to the hydrogen concentration requirements of the test;

[0017] S3. Set the temperature in the high and low temperature chamber according to the test temperature requirements. After the temperature sensor detects that the set temperature has been reached and remains stable, proceed to the next step.

[0018] S4. Replace the air in the hydrogen-rich environment chamber;

[0019] S5. Open the manual valve of the standard gas cylinder, set the pressure reducing valve and flow controller to the target pressure and flow, open the inlet valve, and introduce standard gas into the hydrogen-containing environment chamber;

[0020] S6. Turn on the humidifier and adjust the ambient humidity in the hydrogen-rich environment chamber;

[0021] S7. Once the hydrogen concentration, pressure, and humidity in the hydrogen-contaminated environment chamber meet the test requirements, the test begins. Simultaneously, the control system starts timing and monitors the discoloration of the hydrogen-sensitive tape in real time via a video recording device.

[0022] Furthermore, the specific process of step S4 is as follows:

[0023] S41. Close the manual valve, inlet valve, outlet valve and extraction valve of the standard gas cylinder;

[0024] S42. Start the vacuum pump, open the inlet valve and the evacuation valve, evacuate the hydrogen-containing environment chamber to the target pressure, and then close the evacuation valve;

[0025] S43. Open the manual valve of the standard gas cylinder, set the pressure reducing valve and flow controller to the target pressure and flow rate, introduce standard gas into the hydrogen-containing environment chamber to the target pressure, close the inlet valve, open the evacuation valve, evacuate to the target pressure and then close the evacuation valve.

[0026] S44. Repeat step S43 three times or more, then turn off the vacuum pump. The replacement process is now complete.

[0027] Hydrogen-sensitive tape is used for detecting minute leaks. Therefore, the gas source used in experimental testing is generally a standard gas with a hydrogen concentration in the ppm range. Depending on the hydrogen concentration, it usually takes tens of minutes to several hours for the hydrogen-sensitive tape to change color. Therefore, introducing a certain amount of standard hydrogen gas during the replacement process will not cause the tested tape to change color significantly.

[0028] Furthermore, it also includes the following steps:

[0029] S8. After the test begins, the testing personnel can set the standard color for automatic test stop in the control system. When the control system recognizes that the color of the hydrogen-sensitive tape reaction surface is consistent with the set color, the system will automatically stop the test.

[0030] S9. After the test, close the manual valve and humidifier of the standard gas cylinder, then open the inlet valve and outlet valve to depressurize and vent the hydrogen-contaminated environment chamber. Open the high and low temperature environment chamber and the hydrogen-contaminated environment chamber, and remove the hydrogen-sensitive tape after the test.

[0031] This invention also provides another method for verifying the effectiveness of hydrogen-sensitive tape using the above system, comprising the following steps:

[0032] S1. Place the hydrogen-sensitive tape to be tested on the support device, and close the hydrogen-contaminated environment chamber and the high-low temperature environment chamber;

[0033] S2. Connect the corresponding standard gas cylinder to the gas inlet pipe according to the hydrogen concentration requirements of the test;

[0034] S3. Set the temperature in the high and low temperature chamber according to the test temperature requirements. After the temperature sensor detects that the set temperature has been reached and remains stable, proceed to the next step.

[0035] S4. Replace the air in the hydrogen-rich environment chamber;

[0036] S5. Open the manual valve of the standard gas cylinder, set the pressure reducing valve and flow controller to the target pressure and flow, and then open the inlet valve and outlet valve in sequence;

[0037] S6. Once the hydrogen concentration in the hydrogen-rich environment chamber reaches the set target as monitored by the first hydrogen concentration sensor, the test begins. At the same time, the control system starts timing and records the experimental process by video recording device.

[0038] In summary, the present invention has the following advantages:

[0039] The technical solution of this invention provides hydrogen gas of the required concentration for experimental testing into a hydrogen-contaminated environment chamber via a standard gas cylinder. A first hydrogen concentration sensor, a pressure sensor, and a humidity sensor are used to detect the tested hydrogen concentration, pressure, and humidity. A high-low temperature environment chamber controls the test temperature, and a vacuum pump displaces air from the hydrogen-contaminated environment chamber, preventing air interference with the test. The hydrogen-sensitive tape effectiveness verification system provided by this invention is simple and convenient to operate, accurately simulates various environmental conditions such as hydrogen concentration, temperature, and humidity, and accurately verifies the effectiveness of hydrogen-sensitive tape under different environmental conditions. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the hydrogen-sensitive tape effectiveness verification system in Embodiment 1 of the present invention;

[0042] Figure 2 This is a schematic diagram of the support device in Embodiment 1 of the present invention;

[0043] Figure 3 This is a rear view of the support device in Embodiment 1 of the present invention.

[0044] Explanation of reference numerals in the attached diagram: 1-Standard gas cylinder; 2-Manual valve; 3-Pressure reducing valve; 4-Flow controller; 5-Inlet valve; 6-Hydrogen-contaminated environment chamber; 7-Support device; 71-Support base; 72-Adhesive plate; 721-Through hole; 722-Arc groove; 73-Hydrogen-sensing tape; 8-Outlet valve; 9-First hydrogen concentration sensor; 10-Pressure sensor; 11-Extraction valve; 12-Vacuum pump; 13-Video recording device; 14-High and low temperature environment chamber; 15-Temperature sensor; 16-Second hydrogen concentration sensor; 17-Control system; 18-Humidity sensor; 19-Humidifier. Detailed Implementation

[0045] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Example 1

[0049] A hydrogen-sensitive tape validity verification system, such as Figure 1 As shown, it includes a high and low temperature environment chamber 14, a hydrogen-containing environment chamber 6 and a video shooting device 13 are installed in the high and low temperature environment chamber 14, a support device 7 and a humidifier 19 are installed in the hydrogen-containing environment chamber 6, a standard gas cylinder 1 and a vacuum pump 12 connected to the hydrogen-containing environment chamber 6 are installed outside the high and low temperature environment chamber 14, and a control system 17 is also configured.

[0050] Standard gas cylinder 1 contains standard gas with a hydrogen concentration that meets the specific values ​​required for the experimental test. The standard gas can be any commercially available type. Standard gas cylinder 1 is equipped with a manual valve 2. Standard gas cylinder 1 is connected to the hydrogen-rich environment chamber 6 via an inlet pipe. The inlet pipe is equipped with a pressure reducing valve 3, a flow controller 4, and an inlet valve 5. The inlet pressure range of the pressure reducing valve 3 should be greater than the maximum pressure of standard gas cylinder 1, and the outlet pressure range should be determined according to the working pressure of the detection system. The flow controller 4 can accurately control and monitor the gas flow rate in the system. The pressure reducing valve 3, flow controller 4, and inlet valve 5 are all connected to the control system 17.

[0051] like Figure 2 and Figure 3 As shown, the support device 7 includes a support base 71 installed at the bottom of the hydrogen-contaminated environment chamber 6. The support base 71 has an open top and an internal receiving cavity. The support base 71 has arc-shaped grooves 722 on the upper part of the front and rear side walls and square grooves on the left and right side walls. An adhesive plate 72 is placed in the receiving cavity to fix the hydrogen-sensitive tape 73 to be tested. The thickness of the adhesive plate 72 is slightly smaller than the thickness of the receiving cavity to facilitate the insertion of the adhesive plate 72 and to ensure that the adhesive plate 72 does not tilt at a large angle, keeping it basically vertical. A through hole 721 is provided at the center of the adhesive plate 72. The center of the through hole 721 coincides with the center of the adhesive plate 72. The diameter of the through hole 721 is smaller than the width of the hydrogen-sensitive tape 73 to be tested, ensuring that the hydrogen-sensitive tape 73 completely covers the through hole 721 when it is applied. The through hole 721 is located in the arc groove 722 of the support base 71 and will not be blocked by the side wall of the support base 71, making it easy to observe the hydrogen-sensitive tape 73 at the through hole 721.

[0052] Multiple support devices 7 can be installed in the hydrogen-contaminated environment chamber 6. When multiple series of hydrogen-sensitive tapes need to be compared and tested, different series of hydrogen-sensitive tapes can be pasted on different support devices 7 for simultaneous testing. A transparent observation port is provided on the side wall of the hydrogen-contaminated environment chamber 6. The size of the transparent observation port is large enough to observe the hydrogen-sensitive tapes at all the through holes 721.

[0053] The hydrogen-environment chamber 6 is equipped with a first hydrogen concentration sensor 9, a pressure sensor 10, and a humidity sensor 18 on its side wall. The first hydrogen concentration sensor 9 monitors the hydrogen concentration in the hydrogen-environment chamber 6 in real time and feeds the hydrogen concentration signal back to the control system 17. The pressure sensor 10 monitors the pressure in the hydrogen-environment chamber 6 in real time and feeds the pressure signal back to the control system 17. The humidity sensor 18 monitors the humidity in the hydrogen-environment chamber 6 in real time and feeds the humidity signal back to the control system 17. An exhaust pipe connected to the external environment is installed on the side wall of the hydrogen-environment chamber 6. An outlet valve 8 is installed on the exhaust pipe. After the test, pressure is released and exhaust is performed through the exhaust pipe and outlet valve 8. An extraction pipe is also installed on the side wall of the hydrogen-environment chamber 6. The extraction pipe is connected to a vacuum pump 12 outside the high and low temperature environment chamber 14. An extraction valve 11 is installed on the extraction pipe. The vacuum pump 12 replaces the air in the hydrogen-environment chamber 6, reducing air interference with the test. It can also be used to exhaust air after the test.

[0054] When installing the video recording device 13 inside the high and low temperature environment chamber 14, its camera should be directly facing the transparent observation port of the hydrogen-contaminated environment chamber 6. The video recording device 13 can be controlled to start and stop through the control system 17. During the effectiveness verification process, the video recording device 13 monitors the discoloration of the hydrogen-sensitive tape and transmits the recording information to the control system 17.

[0055] The high and low temperature environment chamber 14 is a commercially available high and low temperature environment test chamber capable of simulating various temperature environments. It can set a target temperature and control the temperature inside the chamber to maintain the set temperature. The side wall of the high and low temperature environment chamber 14 is equipped with a second hydrogen concentration sensor 16 and a temperature sensor 15. The second hydrogen concentration sensor 16 can monitor the hydrogen concentration in the high and low temperature environment chamber 14 in real time, detect whether hydrogen leakage has occurred in the hydrogen-containing environment chamber 6, and feed back the hydrogen concentration signal to the control system 17. The temperature sensor 15 can monitor the temperature in the high and low temperature environment chamber 14 in real time and feed back the temperature signal to the control system 17.

[0056] The control system 17 is installed outside the high and low temperature environment chamber 14 and can be integrated with the control system built into the high and low temperature environment chamber 14. It can collect the monitoring data of each sensor in the system in real time and control the opening and closing of each valve. It can also record multiple standard colors and monitor the color change of the hydrogen-sensitive tape in real time through the video shooting device 13, and compare the color depth of the hydrogen-sensitive tape during the test with the standard color in real time. It also has a timing function, which can set the test time and record the color change time of the hydrogen-sensitive tape.

[0057] The control system 17 converts the hydrogen-sensitive tape image captured by the video capturing device 13 from the RGB color space to the HSV color space (H: Hue; S: Saturation; V: Lightness; V: Brightness) using a conversion algorithm, thereby achieving quantitative recognition of color depth. After testing multiple hydrogen-sensitive tapes, it was found that only the V (Lightness) value changed significantly after the tape changed color. Therefore, color depth recognition essentially involves identifying the V (Lightness) value in the HSV color space. A standard color's lightness value is used as a threshold, and the degree of color change is determined by comparison.

[0058] Conversion from RGB to HSV:

[0059] V←max(R,G,B)

[0060]

[0061] If H<0then H←H+360.On output 0≤V≤1,0≤S≤1,0≤H≤360

[0062] The control system 17 pairs of hydrogen-sensitive tape color recognition steps are as follows:

[0063] 1. For different brands and models of hydrogen-sensitive tape, determine the standard color image of color change through preliminary tests;

[0064] 2. Input the color-changing standard color image into the control system 17, and convert the image from the RGB color space to the HSV color space through a conversion algorithm, taking the brightness value V in the HSV color as the threshold;

[0065] 3. After the experiment begins, the video recording device 13 captures and processes images of the hydrogen-sensitive tape in real time, and obtains the brightness value V of the hydrogen-sensitive tape color at that moment through a conversion algorithm. n ;

[0066] 4. Set the brightness value V n Compare the result with the threshold V and output the judgment result.

[0067] The method for verifying the effectiveness of hydrogen-sensitive tape using the above system is as follows:

[0068] S1. A piece of hydrogen-sensitive tape 73 to be tested is attached to the adhesive plate 72, and then the adhesive plate 72 is placed in the receiving cavity of the support base 71, and the hydrogen-contaminated environment chamber 6 is closed.

[0069] S2. Based on the hydrogen concentration conditions in the experimental test, prepare the corresponding standard gas bottle 1 and connect the standard gas bottle 1 to the gas inlet pipe;

[0070] S3. According to the temperature requirements in the experimental test, set the target temperature of the high and low temperature environment chamber 14. Only after the temperature sensor 15 detects that the high and low temperature environment chamber 14 has reached the target temperature and remains stable can the next step be carried out.

[0071] S4. Perform gas replacement to remove the air from the hydrogen-rich environment chamber 6:

[0072] S41. Close the manual valve 2, inlet valve 5, outlet valve 8 and extraction valve 11 of standard gas cylinder 1;

[0073] S42. Start vacuum pump 12, open inlet valve 5 and evacuation valve 11, evacuate hydrogen environment chamber 6 to the target pressure, and then close evacuation valve 11;

[0074] S43. Open the manual valve 2 of the standard gas cylinder 1, set the pressure reducing valve 3 and flow controller 4 to the target pressure and flow rate, introduce standard gas into the hydrogen-rich environment chamber 6 to the target pressure, close the inlet valve 5, open the evacuation valve 11, evacuate to the target pressure and then close the evacuation valve 11.

[0075] S44. Repeat step S43 three times or more, then turn off vacuum pump 12 to complete the replacement.

[0076] S5. Open the manual valve 2 of the standard gas cylinder 1, set the pressure reducing valve 3 and flow controller 4 to the target pressure and flow, open the inlet valve 5, and introduce standard gas into the hydrogen-containing environment chamber 6;

[0077] S6. Start the humidifier 19 to adjust the ambient humidity in the hydrogen-rich environment chamber 6;

[0078] S7. Once the hydrogen concentration, pressure, and humidity in the hydrogen-rich environment chamber 6 are monitored by the first hydrogen concentration sensor 9, pressure sensor 10, and humidity sensor 18 and reach the set target, the test officially begins. At the same time, the control system 17 starts timing and activates the video recording device 13 to record the experimental process.

[0079] S8. After the test begins, the testing personnel can set a standard color for automatic test stop in the control system 17. When the control system 17 detects that the color of the reaction surface of the hydrogen-sensitive tape 73 matches the set color, the system will automatically stop the test. In addition, the testing personnel can also set the test time, and the test will stop immediately after the time expires. The testing personnel can also conduct manual observation and manually stop the test. During the test, when the pressure in the hydrogen-containing environment chamber 6 is detected to decrease, the inlet valve 5 is opened to replenish standard gas to the target pressure in the hydrogen-containing environment chamber 6. When the pressure in the hydrogen-containing environment chamber 6 is detected to increase, the outlet valve 5 is opened to release gas to the target pressure.

[0080] S9. After the test, the control system 17 can automatically save the test time, video images of the test process, real-time monitoring data of the sensors, etc., manually close the manual valve 2 of the standard gas cylinder 1, turn off the humidifier 19, and then open the inlet valve 5 and the outlet valve 8 to depressurize and exhaust the hydrogen environment chamber 6, and remove the test hydrogen sensing tape 73.

[0081] Example 2

[0082] This embodiment provides another method for verifying the effectiveness of hydrogen-sensitive tape using the system in Embodiment 1, the process of which is as follows:

[0083] S1. A piece of hydrogen-sensitive tape 73 to be tested is attached to the adhesive plate 72, and then the adhesive plate 72 is placed in the receiving cavity of the support base 71, and the hydrogen-contaminated environment chamber 6 is closed.

[0084] S2. Based on the hydrogen concentration conditions in the experimental test, prepare the corresponding standard gas bottle 1 and connect the standard gas bottle 1 to the gas inlet pipe;

[0085] S3. According to the temperature requirements in the experimental test, set the target temperature of the high and low temperature environment chamber 14. Only after the temperature sensor 15 detects that the high and low temperature environment chamber 14 has reached the target temperature and remains stable can the next step be carried out.

[0086] S4. Perform gas replacement to remove the air from the hydrogen-rich environment chamber 6:

[0087] S41. Close the manual valve 2, inlet valve 5, outlet valve 8 and extraction valve 11 of standard gas cylinder 1;

[0088] S42. Start vacuum pump 12, open inlet valve 5 and evacuation valve 11, evacuate hydrogen environment chamber 6 to the target pressure, and then close evacuation valve 11;

[0089] S43. Open the manual valve 2 of the standard gas cylinder 1, set the pressure reducing valve 3 and flow controller 4 to the target pressure and flow rate, introduce standard gas into the hydrogen-rich environment chamber 6 to the target pressure, close the inlet valve 5, open the evacuation valve 11, evacuate to the target pressure and then close the evacuation valve 11.

[0090] S44. Repeat step S43 three times or more, then turn off vacuum pump 12 to complete the replacement.

[0091] S5. Open the manual valve 2 of the standard gas cylinder 1, set the pressure reducing valve 3 and flow controller 4 to the target pressure and flow, and open the inlet valve 5 and outlet valve 8 in sequence;

[0092] S6. After the hydrogen concentration in the hydrogen-rich environment chamber 6 is detected by the first hydrogen concentration sensor 9 to reach the set target, the test officially begins. At the same time, the control system 17 starts timing and starts the video recording device 13 to record the experimental process.

[0093] S7. After the test begins, the testing personnel can set the standard color for automatic test stop in the control system 17. When the control system 17 detects that the color of the reaction surface of the hydrogen-sensitive tape 73 is consistent with the set color, the system will automatically stop the test and close the inlet valve 5. In addition, the testing personnel can also set the test time, and the test will stop immediately after the time is up. The testing personnel can also conduct manual observation and manually stop the test.

[0094] S8. After the test is completed, the control system 17 can automatically save the test time, video images of the test process, real-time monitoring data of the sensors, etc., manually close the manual valve 2 of the standard gas cylinder 1, and remove the test hydrogen sensing tape 73.

[0095] The hydrogen-sensitive tape effectiveness verification system provided by this invention has the following advantages:

[0096] I. Accuracy of Environmental Simulation

[0097] The hydrogen concentration simulation is accurate. Through the cooperation of standard gas cylinders, pressure reducing valves and flow controllers, the flow rate of hydrogen entering the hydrogen-contaminated environment chamber can be precisely controlled. By using standard gas of different concentrations, various hydrogen concentration environments can be accurately simulated. This allows the hydrogen-sensitive tape to undergo effectiveness verification under different and accurately set hydrogen concentration conditions, ensuring that the test results can truly reflect its performance in various practical application scenarios.

[0098] II. Diverse Temperature and Humidity Environment Simulation: The high and low temperature environment chamber can set the target temperature and effectively control the temperature inside the chamber to maintain the set value. The humidifier can effectively control the humidity inside the chamber. Combined with the simulation of hydrogen concentration, it realizes a realistic simulation of the hydrogen-sensitive tape environment, making the verification results more comprehensive and practical.

[0099] III. Comprehensiveness of Testing Process Monitoring

[0100] Multi-sensor real-time monitoring: The hydrogen-concentration chamber is equipped with a primary hydrogen concentration sensor, a pressure sensor, and a humidity sensor. The high- and low-temperature chambers are equipped with a temperature sensor and a secondary hydrogen concentration sensor. These sensors monitor key parameters (hydrogen concentration, pressure, temperature, and humidity) in their respective environments in real time and feed the signals back to the control system. This allows operators to monitor changes in the testing environment in real time, promptly detect anomalies, ensure the stability and safety of the testing process, and provide ample data support for subsequent accurate analysis of the relationship between the effectiveness of the hydrogen-sensitive tape and environmental parameters.

[0101] Full video recording: The video recording device installed in the high and low temperature environment chamber can monitor the discoloration of the hydrogen-sensitive tape throughout the effectiveness verification process, and can be controlled to start and stop via the control system. This not only intuitively records the important effectiveness indicator information of the hydrogen-sensitive tape's appearance change, but also facilitates subsequent review and comparison of the change process at different stages, helping to accurately judge the effectiveness of the hydrogen-sensitive tape. Especially for some subtle or gradual discoloration processes, video recording can provide more detailed and accurate observation data.

[0102] IV. System Functional Flexibility

[0103] Simultaneous verification of multiple tapes: Multiple support bases can be set in the hydrogen-sensitive tape support device to realize the effectiveness verification of multiple series of hydrogen-sensitive tapes at the same time, which improves the verification efficiency. Especially when it is necessary to compare the performance of different types and batches of hydrogen-sensitive tapes, tests can be carried out simultaneously under the same environmental conditions, reducing errors caused by environmental differences and other factors, and making it easier to conduct horizontal comparative analysis of the effectiveness of each hydrogen-sensitive tape.

[0104] Standard color comparison judgment: The control system can input multiple standard colors and monitor the color change of the hydrogen-sensitive tape in real time by combining it with a video shooting device. The color depth of the tape during the test is compared with the standard color in real time, which provides a quantitative reference for more accurate and objective judgment of the effectiveness of the hydrogen-sensitive tape. This avoids the errors that may occur if the color change is judged subjectively by the human eye, and makes the determination of effectiveness more scientific and reliable.

[0105] In summary, the hydrogen-sensitive tape effectiveness verification system provided by this invention can accurately simulate various environmental conditions such as hydrogen concentration, temperature, and humidity, and accurately verify the effectiveness of hydrogen-sensitive tape under different environmental conditions. It is also simple and convenient to operate and has strong practicality.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrogen-sensitive adhesive tape validity verification system, characterized in that, The system includes a high and low temperature environment chamber (14), which contains a hydrogen-containing environment chamber (6). The hydrogen-containing environment chamber (6) has a transparent observation port and a support device (7). A standard gas bottle (1) is provided outside the high and low temperature environment chamber (14). The standard gas bottle (1) contains standard gas, and the concentration of hydrogen in the standard gas meets the requirements of the experimental test. The standard gas bottle (1) is connected to the hydrogen-containing environment chamber (6) through an inlet pipe. The side wall of the hydrogen-containing environment chamber (6) is provided with an outlet pipe that communicates with the external environment. An inlet valve (5) is provided on the inlet pipe, and an outlet valve (8) is provided on the outlet pipe. The hydrogen-rich environment chamber (6) is equipped with a first hydrogen concentration sensor (9), a pressure sensor (10), and a humidity sensor (18) on its side wall; a humidifier (19) is installed inside the hydrogen-rich environment chamber (6); a video recording device (13) is installed in the high and low temperature environment chamber (14); the first hydrogen concentration sensor (9), the pressure sensor (10), the humidity sensor (18), the humidifier (19), and the video recording device (13) are all connected to the control system (17); The intake pipe is also equipped with a pressure reducing valve (3) and a flow controller (4), both of which are connected to the control system (17). It also includes a vacuum pump (12) located outside the high and low temperature environment chamber (14), the vacuum pump (12) being connected to the hydrogen-rich environment chamber (6) via a suction pipe, and a suction valve (11) being provided on the suction pipe; The support device (7) includes a support base (71), the support base (71) is provided with a receiving cavity, the receiving cavity is provided with an adhesive plate (72), the adhesive plate (72) is used to fix the hydrogen-sensitive tape to be tested, and the adhesive plate (72) is provided with a through hole (721). The center of the through hole (721) coincides with the center of the adhesive plate (72); The diameter of the through hole (721) is smaller than the width of the hydrogen-sensitive tape to be tested; It includes multiple support devices (7), and hydrogen-sensitive tape on all of the support devices (7) can be observed from the transparent viewing port.

2. The hydrogen-sensitive tape effectiveness verification system according to claim 1, characterized in that, The high and low temperature environment chamber (14) is equipped with a temperature sensor (15) and a second hydrogen concentration sensor (16) on its side wall. Both the temperature sensor (15) and the second hydrogen concentration sensor (16) are connected to the control system (17).

3. A method for verifying the effectiveness of hydrogen-sensitive adhesive tape using the system described in any one of claims 1-2, characterized in that, Includes the following steps: S1. Place the hydrogen-sensitive tape to be tested on the support device (7), and close the hydrogen-contaminated environment chamber (6) and the high and low temperature environment chamber (14); S2. Connect the corresponding standard gas cylinder (1) to the gas inlet pipe according to the hydrogen concentration requirements of the test; S3. Set the temperature in the high and low temperature environment chamber (14) according to the temperature requirements of the test. After the temperature sensor detects that the set temperature has been reached and remains stable, proceed to the next step. S4. Replace the air in the hydrogen-rich environment chamber (6); S5. Open the manual valve (2) of the standard gas cylinder (1), set the pressure reducing valve (3) and flow controller (4) to the target pressure and flow, open the inlet valve (5), and introduce standard gas into the hydrogen-containing environment chamber (6); S6. Start the humidifier (19) and adjust the ambient humidity in the hydrogen-rich environment chamber (6); S7. After the hydrogen concentration, pressure and humidity in the hydrogen-contaminated environment chamber (6) are monitored by the first hydrogen concentration sensor (9), pressure sensor (10) and humidity sensor (18) and the test requirements are met, the test begins. At the same time, the control system (17) starts timing and monitors the discoloration of the hydrogen-contaminated tape in real time through the video shooting device (13).

4. The method according to claim 3, characterized in that, The specific process of step S4 is as follows: S41. Close the manual valve (2), inlet valve (5), outlet valve (8) and extraction valve (11) of the standard gas cylinder (1); S42. Start the vacuum pump (12), open the inlet valve (5) and the evacuation valve (11), evacuate the hydrogen environment chamber (6) to the target pressure, and then close the evacuation valve (11); S43. Open the manual valve (2) of the standard gas cylinder (1), set the pressure reducing valve (3) and flow controller (4) to the target pressure and flow rate, introduce standard gas into the hydrogen-containing environment chamber (6) to the target pressure, close the inlet valve (5), open the vacuum valve (11), evacuate to the target pressure and then close the vacuum valve (11); S44. Repeat step S43 three times or more, then turn off the vacuum pump (12) to complete the replacement.

5. The method according to claim 4, characterized in that, It also includes the following steps: S8. After the test starts, the tester can set the standard color for automatic test stop in the control system (17). When the control system (17) recognizes that the color of the hydrogen-sensitive tape reaction surface is consistent with the set color, the system will automatically stop the test. S9. After the test, close the manual valve (2) of the standard gas cylinder (1) and the humidifier (19), then open the inlet valve (5) and the outlet valve (8) to depressurize and exhaust the hydrogen-contaminated environment chamber (6), open the high and low temperature environment chamber (14) and the hydrogen-contaminated environment chamber (6), and take out the hydrogen-contaminated tape after the test is completed.

6. A method for verifying the effectiveness of hydrogen-sensitive adhesive tape using the system described in any one of claims 1-2, characterized in that, Includes the following steps: S1. Place the hydrogen-sensitive tape to be tested on the support device (7), and close the hydrogen-contaminated environment chamber (6) and the high and low temperature environment chamber (14); S2. Connect the corresponding standard gas cylinder (1) to the gas inlet pipe according to the hydrogen concentration requirements of the test; S3. Set the temperature in the high and low temperature environment chamber (14) according to the temperature requirements of the test. After the temperature sensor detects that the set temperature has been reached and remains stable, proceed to the next step. S4. Replace the air in the hydrogen-rich environment chamber (6); S5. Open the manual valve (2) of the standard gas cylinder (1), set the pressure reducing valve (3) and flow controller (4) to the target pressure and flow, and open the inlet valve (5) and outlet valve (8) in sequence; S6. After the hydrogen concentration in the hydrogen-rich environment chamber (6) is monitored by the first hydrogen concentration sensor (9) and the target is reached, the test begins. At the same time, the control system (17) starts timing and records the experimental process by video recording device (13).

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