System and method for verifying effectiveness of hydrogen-sensitive adhesive tape

Abstract

The invention discloses a hydrogen-sensitive adhesive tape effectiveness verification system and method. Comprising a high-low temperature environment bin, a hydrogen environment bin is arranged in the high-low temperature environment bin, a transparent observation opening is formed in the hydrogen environment bin, a supporting device is arranged in the hydrogen environment bin, a standard gas cylinder is communicated with the hydrogen environment bin through a gas inlet pipe, and a gas outlet pipe is arranged on the side wall of the hydrogen environment bin; an inlet valve is arranged on the air inlet pipe, and an outlet valve is arranged on the air outlet pipe; a first hydrogen concentration sensor, a pressure sensor and a humidity sensor are arranged on the side wall of the hydrogen environment cabin, and a humidifier is arranged in the hydrogen environment cabin; a video shooting device is arranged in the high and low temperature environment bin; the first hydrogen concentration sensor, the pressure sensor, the humidity sensor, the humidifier and the video shooting device are all connected with a control system; the vacuum pump is connected with the hydrogen environment bin through an exhaust pipe. The system provided by the invention can verify the hydrogen leakage detection reliability of the hydrogen-sensitive adhesive tape, explores the color change performance of the hydrogen-sensitive adhesive tape under different environmental conditions, and is simple and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen-sensitive adhesive tape testing systems, and in particular to a hydrogen-sensitive adhesive tape effectiveness verification system and method. Background Art

[0002] Hydrogen energy has the characteristics of high combustion calorific value, high energy density, low carbon and environmental protection, reproducible and large reserves. It is an ideal secondary energy source. However, hydrogen is flammable and explosive, and the hydrogen embrittlement effect can easily lead to material failure and hydrogen leakage. In hydrogen production plants and hydrogen refueling stations, there are a lot of hydrogen pipelines, joints, valves and other components. In order to ensure the safety of hydrogen energy application, it is very important to detect hydrogen leaks in these parts. At present, the detection of hydrogen leaks in hydrogen refueling stations mainly uses fixed hydrogen sensors or manual inspections. Fixed hydrogen sensors are not timely in leak detection in open spaces, and the detection accuracy of small leaks is insufficient. Manual inspections can identify small leaks, but manual inspections generally use handheld hydrogen sensors to detect leak-prone parts. This method has low working efficiency and is prone to missed detection and wrong detection. When hydrogen-sensitive tape comes into contact with hydrogen, a chemical reaction will occur and the color will change. The hydrogen-sensitive tape is attached to the part where hydrogen is prone to leak. When hydrogen leaks, the leak source can be quickly locked, greatly improving the efficiency and accuracy of leak identification.

[0003] As an efficient and accurate hydrogen leak detection tool, hydrogen sensitive tape has been widely used in the field of hydrogen energy, especially in hydrogen refueling stations. At present, the research related to hydrogen sensitive tape mainly focuses on the preparation method of hydrogen sensitive tape and the hydrogen leak detection system based on hydrogen sensitive tape, but there are few related studies on the effectiveness verification of hydrogen sensitive tape after contact with hydrogen. In order to verify the reliability of hydrogen leak detection of hydrogen sensitive tape and explore the color change performance of hydrogen sensitive tape under different environmental conditions (hydrogen concentration, ambient temperature, etc.), the present invention is proposed. Summary of the invention

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

[0005] The present invention provides a hydrogen-sensitive tape effectiveness verification system, comprising a high and low temperature environment chamber, wherein a hydrogen environment chamber is provided in the high and low temperature environment chamber, a transparent observation port is provided on the hydrogen environment chamber, a supporting device is provided in the hydrogen environment chamber, a standard gas bottle is provided outside the high and low temperature environment chamber, the standard gas bottle contains standard gas, and the concentration of hydrogen in the standard gas meets the specific value required by the experimental test; the standard gas bottle is connected with the hydrogen environment chamber through an air inlet pipe, and a side wall of the hydrogen environment chamber is provided with an air outlet pipe connected with the external environment; the air inlet pipe is provided with an inlet valve, and the air outlet pipe is provided with an outlet valve;

[0006] A first hydrogen concentration sensor, a pressure sensor and a humidity sensor are provided on the side wall of the hydrogen environment chamber; a humidifier is provided inside the hydrogen environment chamber; a video shooting device is provided in the high and low temperature environment chamber, and the first hydrogen concentration sensor, the pressure sensor, the humidity sensor, the humidifier and the video shooting device are all connected to a control system;

[0007] The air intake pipe is also provided with a pressure reducing valve and a flow controller, and both the pressure reducing valve and the flow controller are connected to the control system;

[0008] It also includes a vacuum pump located outside the high and low temperature environment chamber, the vacuum pump is connected to the hydrogen environment chamber through an exhaust pipe, and the exhaust pipe is provided with an exhaust valve.

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

[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, a plurality of the supporting devices are included, and the hydrogen-sensitive tapes on all the supporting devices can be observed from the transparent observation 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] The present invention provides a method for verifying the effectiveness of a hydrogen-sensitive tape using the above system, comprising the following steps:

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

[0016] S2. According to the hydrogen concentration requirements of the test, connect the corresponding standard gas bottle to the air inlet pipe;

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

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

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

[0020] S6. Start the humidifier to adjust the ambient humidity in the hydrogen environment chamber;

[0021] S7. After the first hydrogen concentration sensor, pressure sensor and humidity sensor monitor that the hydrogen concentration, pressure and humidity in the hydrogen environment chamber meet the test requirements, the test starts, and the control system starts timing at the same time, and the color change of the hydrogen-sensitive tape is monitored in real time through the video shooting device.

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

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

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

[0025] S43. Then open the manual valve of the standard gas bottle, set the pressure reducing valve and flow controller to the target pressure and flow, introduce the standard gas to the hydrogen environment chamber to the target pressure, close the inlet valve, open the exhaust valve, evacuate to the target pressure and then close the exhaust valve;

[0026] S44. Repeat step S43 three or more times, turn off the vacuum pump, and the replacement is completed.

[0027] The application scenario of hydrogen-sensitive tape is small leak detection. Therefore, the gas source used in experimental tests is generally a standard gas with a hydrogen concentration of ppm. 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 hydrogen standard gas during the replacement process will not cause obvious discoloration of the tape being tested.

[0028] Furthermore, the method further comprises the following steps:

[0029] S8. After the test starts, the inspector can set the standard color for automatic test stop in the control system. When the control system recognizes that the color of the reaction surface of the hydrogen-sensitive tape is consistent with the set color, the system automatically stops 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, depressurize and exhaust the hydrogen environment chamber, open the high and low temperature environment chamber and the hydrogen environment chamber, and take out the hydrogen-sensitive tape after the test.

[0031] The present invention also provides another method for verifying the effectiveness of a 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 environment chamber and the high and low temperature environment chamber;

[0033] S2. According to the hydrogen concentration requirements of the test, connect the corresponding standard gas bottle to the air inlet pipe;

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

[0035] S4. Replace the air in the hydrogen 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 open the inlet valve and outlet valve in sequence;

[0037] S6. After the first hydrogen concentration sensor monitors that the hydrogen concentration in the hydrogen environment chamber reaches the set target, the test starts, and the control system starts timing, and the experimental process is recorded by the video shooting device.

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

[0039] The technical solution of the present invention provides hydrogen of a concentration that meets the experimental test requirements to the hydrogen environment chamber through a set standard gas cylinder, and detects the tested hydrogen concentration, pressure and humidity through the set first hydrogen concentration sensor, pressure sensor and humidity sensor. The set high and low temperature environment chamber can control the test temperature, and the set vacuum pump can replace the air in the hydrogen environment chamber to avoid air interference with the test. The hydrogen-sensitive tape effectiveness verification system provided by the present invention is simple and convenient to operate, can accurately simulate various environmental conditions such as hydrogen concentration, temperature and humidity, and accurately verify the effectiveness of the hydrogen-sensitive tape under different environmental conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 Schematic diagram of the hydrogen-sensitive tape effectiveness verification system in Example 1 of the present invention;

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

[0043] Figure 3 It is a rear view of the supporting device in Example 1 of the present invention.

[0044] Explanation of the reference numerals: 1-standard gas cylinder; 2-manual valve; 3-pressure reducing valve; 4-flow controller; 5-inlet valve; 6-hydrogen environment chamber; 7-support device; 71-support base; 72-adhesive plate; 721-through hole; 722-arc groove; 73-hydrogen sensitive tape; 8-outlet valve; 9-first hydrogen concentration sensor; 10-pressure sensor; 11-vacuum valve; 12-vacuum pump; 13-video shooting 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 DESCRIPTION

[0045] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[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, in which a hydrogen environment chamber 6 and a video shooting device 13 are arranged, in which a supporting device 7 and a humidifier 19 are arranged, and outside the high and low temperature environment chamber 14, a standard gas bottle 1 and a vacuum pump 12 connected to the hydrogen environment chamber 6 are arranged, and a control system 17 is also configured.

[0050] The standard gas cylinder 1 contains standard gas, and the concentration of hydrogen in the standard gas meets the specific value required by the experimental test. The standard gas is any type purchased on the market. The standard gas cylinder 1 is equipped with a manual valve 2. The standard gas cylinder 1 is connected to the hydrogen environment chamber 6 through an air inlet pipe, and a pressure reducing valve 3, a flow controller 4 and an inlet valve 5 are installed on the air inlet pipe. The inlet pressure range of the pressure reducing valve 3 should be greater than the maximum pressure of the 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 is set to accurately control and monitor the gas flow in the system. The pressure reducing valve 3, the flow controller 4 and the 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 environment chamber 6. The top of the support base 71 is open, and a accommodating cavity is arranged inside. The support base 71 is provided with an arc groove 722 on the upper part of the front and rear side walls, and a square groove is arranged on the left and right side walls. A pasting plate 72 is placed in the accommodating cavity, and the pasting plate 72 is used to fix the hydrogen-sensitive tape 73 to be tested. The thickness of the pasting plate 72 is slightly smaller than the thickness of the accommodating cavity, which is convenient for the pasting plate 72 to be placed, and at the same time ensures that the pasting plate 72 will not tilt at a large angle, so that it remains basically vertical. A through hole 721 is arranged at the center of the pasting plate 72, and the center of the through hole 721 coincides with the center of the pasting 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 pasted. The through hole 721 is located exactly in the arc groove 722 of the support base 71 and will not be blocked by the side wall of the support base 71 , so it is easy to observe the hydrogen-sensitive tape 73 at the through hole 721 .

[0052] Multiple sets of support devices 7 can be set in the hydrogen environment chamber 6. When multiple series of hydrogen sensitive tapes need to be compared and tested, different series of hydrogen sensitive tapes can be attached to different support devices 7 and tested simultaneously. A transparent observation port is set on the side wall of the hydrogen environment chamber 6. The size of the transparent observation port is large enough to observe the hydrogen sensitive tapes at all through holes 721.

[0053] The side wall of the hydrogen environment chamber 6 is equipped with a first hydrogen concentration sensor 9, a pressure sensor 10 and a humidity sensor 18. The first hydrogen concentration sensor 9 can monitor the hydrogen concentration in the hydrogen environment chamber 6 in real time and feed back the hydrogen concentration signal to the control system 17; the pressure sensor 10 can monitor the pressure in the hydrogen environment chamber 6 in real time and feed back the pressure signal to the control system 17; the humidity sensor 18 can monitor the humidity in the hydrogen environment chamber 6 in real time and feed back the humidity signal to the control system 17. An outlet pipe connected to the external environment is installed on the side wall of the hydrogen environment chamber 6, and an outlet valve 8 is installed on the outlet pipe. After the test is completed, the pressure is released and the exhaust is exhausted through the outlet pipe and the outlet valve 8. An exhaust pipe is provided on the side wall of the hydrogen environment chamber 6, and the exhaust pipe is connected to the vacuum pump 12 outside the high and low temperature environment chamber 14, and an exhaust valve 11 is provided on the exhaust pipe. The air in the hydrogen environment chamber 6 is replaced by the vacuum pump 12 to reduce the interference of air on the test test, and it can also be used to exhaust the gas after the test is completed.

[0054] When the video camera 13 inside the high and low temperature environment chamber 14 is installed, its camera should face the transparent observation port of the hydrogen environment chamber 6. The video camera 13 can be started and shut down by the control system 17. The video camera 13 monitors the discoloration of the hydrogen-sensitive tape throughout the effectiveness verification process and transmits the shooting information to the control system 17.

[0055] The high and low temperature environment chamber 14 adopts a high and low temperature environment test chamber sold in the market that can simulate a variety of temperature environments, can set a target temperature, and control the temperature in the chamber to maintain at the set temperature. A second hydrogen concentration sensor 16 and a temperature sensor 15 are provided on the side wall of the high and low temperature environment chamber 14. 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 the hydrogen in the hydrogen environment chamber 6 leaks, 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 of 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 input a variety of standard colors, 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 camera 13 from the RGB color space to the HSV color space (H hue: the three primary colors of red, yellow, and blue; S saturation: the depth of the color, such as dark red and light red; V brightness: the degree of brightness, that is, the grayscale coefficient value) through a conversion algorithm, thereby realizing quantitative identification of the color depth. After testing a variety of hydrogen-sensitive tapes, it was found that only the value of V brightness changed significantly after the hydrogen-sensitive tape changed color. Therefore, the identification of color depth is actually to identify the V brightness value in HSV, take the brightness value of the standard color as the threshold, and determine the degree of color change 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 performs the following steps to identify the color of the hydrogen-sensitive tape:

[0063] 1. For hydrogen-sensitive tapes of different brands and models, determine the color change standard color image 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 lightness value V in the HSV color as the threshold;

[0065] 3. After the test begins, the video camera 13 captures and processes the hydrogen-sensitive tape image 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 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. Paste a section of hydrogen-sensitive tape 73 to be tested on the pasting plate 72, and then place the pasting plate 72 in the accommodating cavity of the support base 71, and close the hydrogen environment chamber 6;

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

[0070] S3. According to the temperature conditions in the experimental test, set the target temperature of the high and low temperature environment chamber 14, and the temperature sensor 15 detects that the high and low temperature environment chamber 14 reaches the target temperature and remains stable before proceeding to the next step;

[0071] S4. Perform gas replacement to replace the air in the hydrogen environment chamber 6:

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

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

[0074] S43. Then open the manual valve 2 of the standard gas bottle 1, set the pressure reducing valve 3 and the flow controller 4 to the target pressure and flow, introduce the standard gas to the hydrogen environment chamber 6 to the target pressure, close the inlet valve 5, open the exhaust valve 11, evacuate to the target pressure and then close the exhaust valve 11;

[0075] S44. Repeat step S43 three or more times, turn off the vacuum pump 12, and the replacement is completed;

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

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

[0078] S7. After the hydrogen concentration, pressure and humidity in the hydrogen environment chamber 6 are monitored by the first hydrogen concentration sensor 9, the pressure sensor 10 and the humidity sensor 18 to reach the set target, the test officially starts, and the control system 17 starts timing, and starts the video shooting device 13 to shoot and record the experimental process;

[0079] S8. After the test starts, the inspector can set a standard color for automatic test stop in the control system 17. When the control system 17 recognizes that the color of the reaction surface of the hydrogen-sensitive tape 73 is consistent with the set color, the system automatically stops the test. In addition, the inspector can also set the test time and stop the test immediately after the time is up. The inspector can also conduct manual observation and manually stop the test. During the test, when the pressure in the hydrogen environment chamber 6 is monitored to decrease, the inlet valve 5 is opened to replenish the standard gas to the target pressure in the hydrogen environment chamber 6. When the pressure in the hydrogen environment chamber 6 is monitored to increase, the outlet valve 5 is opened to release the gas to the target pressure.

[0080] S9. 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 sensor, etc., manually close the manual valve 2 of the standard gas bottle 1, turn off the humidifier 19, and then open the inlet valve 5 and the outlet valve 8, depressurize and exhaust the hydrogen environment chamber 6, and take out the test hydrogen-sensitive tape 73.

[0081] Example 2

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

[0083] S1. Paste a section of hydrogen-sensitive tape 73 to be tested on the pasting plate 72, and then place the pasting plate 72 in the accommodating cavity of the support base 71, and close the hydrogen environment chamber 6;

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

[0085] S3. According to the temperature conditions in the experimental test, set the target temperature of the high and low temperature environment chamber 14, and the temperature sensor 15 detects that the high and low temperature environment chamber 14 reaches the target temperature and remains stable before proceeding to the next step;

[0086] S4. Perform gas replacement to replace the air in the hydrogen environment chamber 6:

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

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

[0089] S43. Then open the manual valve 2 of the standard gas bottle 1, set the pressure reducing valve 3 and the flow controller 4 to the target pressure and flow, introduce the standard gas to the hydrogen environment chamber 6 to the target pressure, close the inlet valve 5, open the exhaust valve 11, evacuate to the target pressure and then close the exhaust valve 11;

[0090] S44. Repeat step S43 three or more times, turn off the vacuum pump 12, and the replacement is completed;

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

[0092] S6. After the first hydrogen concentration sensor 9 monitors that the hydrogen concentration in the hydrogen environment chamber 6 reaches the set target, the test officially starts, and the control system 17 starts timing, and starts the video shooting device 13 to shoot and record the experimental process;

[0093] S7. After the test starts, the inspector 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 reaction surface of the hydrogen-sensitive tape 73 is consistent with the set color, the system automatically stops the test and closes the inlet valve 5. In addition, the inspector can also set the test time, and stop the test immediately after the time is up. The inspector can also perform 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 sensor, etc., manually close the manual valve 2 of the standard gas cylinder 1, and take out the test hydrogen-sensitive tape 73.

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

[0096] 1. Accuracy of environmental simulation

[0097] The hydrogen concentration simulation is accurate. Through the cooperation of the standard gas cylinder, the pressure reducing valve and the flow controller, the hydrogen flow entering the hydrogen environment chamber can be accurately controlled. By using standard gases of different concentrations, various hydrogen concentration environments can be accurately simulated. This allows the hydrogen-sensitive tape to be verified for effectiveness under different and accurately set hydrogen concentration conditions, ensuring that the test results can truly reflect its performance in a variety of actual application scenarios.

[0098] 2. Diverse temperature and humidity environment simulation: The high and low temperature environment chamber can set the target temperature and effectively control the temperature in the chamber to maintain the set value. The humidifier can effectively control the humidity in the chamber. Combined with the simulation of hydrogen concentration, it can achieve a true simulation of the hydrogen-sensitive tape environment, making the verification results more comprehensive and practical.

[0099] 3. Comprehensiveness of testing process monitoring

[0100] Multi-sensor real-time monitoring: The first hydrogen concentration sensor, pressure sensor and humidity sensor are installed in the hydrogen environment chamber, and the temperature sensor and second hydrogen concentration sensor are installed in the high and low temperature environment chamber. These sensors can monitor the key parameters (hydrogen concentration, pressure, temperature, humidity) in the corresponding environment in real time and feed back the signal to the control system. This allows operators to grasp the state changes of the test environment in real time, discover abnormal situations in time, ensure the stability and safety of the test process, and also provide sufficient data support for the subsequent accurate analysis of the relationship between the effectiveness of the hydrogen-sensitive tape and environmental parameters.

[0101] Video recording throughout the process: 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 through the control system. This not only intuitively records the appearance change of the hydrogen-sensitive tape, which is an important effectiveness characterization information, but also facilitates subsequent review and comparison of the change process at different stages, and assists in accurately judging the effectiveness of the hydrogen-sensitive tape. In particular, for some cases where the discoloration process is relatively subtle or gradual, video recording can provide more detailed and accurate observation basis.

[0102] 4. System Function Flexibility

[0103] Simultaneous verification of multiple tapes: Multiple support bases can be set in the hydrogen-sensitive tape support device to achieve simultaneous effectiveness verification of multiple series of hydrogen-sensitive tapes, thereby improving verification efficiency. Especially when it is necessary to compare the performance of hydrogen-sensitive tapes of different types and batches, tests can be carried out simultaneously under the same environmental conditions, reducing errors caused by environmental differences and other factors, and being more conducive to horizontal comparative analysis of the effectiveness of each hydrogen-sensitive tape.

[0104] Standard color comparison judgment: The control system can input a variety of standard colors, and monitor the color change of the hydrogen-sensitive tape in real time by combining with a video shooting device. The color depth of the tape during the test is compared with the standard color in real time, providing a quantitative reference for more accurate and objective judgment of the effectiveness of the hydrogen-sensitive tape, avoiding the errors that may occur when relying solely on the subjective judgment of color changes by the human eye, and making the judgment results of the effectiveness more scientific and reliable.

[0105] In summary, the hydrogen-sensitive tape effectiveness verification system provided by the present invention can accurately simulate various environmental conditions such as hydrogen concentration, temperature, humidity, etc., and accurately verify the effectiveness of the hydrogen-sensitive tape under different environmental conditions. It is 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements 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 tape effectiveness verification system, characterized in that: The high and low temperature environment chamber (14) comprises a hydrogen environment chamber (6) provided in the high and low temperature environment chamber (14), a transparent observation port provided on the hydrogen environment chamber (6), a supporting device (7) provided in the hydrogen environment chamber (6), a standard gas bottle (1) 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 specific value required by the experimental test; the standard gas bottle (1) is connected to the hydrogen environment chamber (6) through an air inlet pipe, and the side wall of the hydrogen environment chamber (6) is provided with an air outlet pipe connected to the external environment; the air inlet pipe is provided with an inlet valve (5), and the air outlet pipe is provided with an outlet valve (8); A first hydrogen concentration sensor (9), a pressure sensor (10) and a humidity sensor (18) are provided on the side wall of the hydrogen environment chamber (6); a humidifier (19) is provided inside the hydrogen environment chamber (6); a video shooting device (13) is provided 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 shooting device (13) are all connected to a control system (17); The air intake pipe is also provided with a pressure reducing valve (3) and a flow controller (4), and the pressure reducing valve (3) and the flow controller (4) are both 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) is connected to the hydrogen environment chamber (6) through an exhaust pipe, and the exhaust pipe is provided with an exhaust valve (11).

2. The hydrogen sensitive tape validity verification system according to claim 1, characterized in that: The support device (7) comprises a support base (71), the support base (71) is provided with a receiving cavity, an adhesive plate (72) is provided in the receiving cavity, 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).

3. The hydrogen sensitive tape validity verification system according to claim 2, characterized in that: The center of the through hole (721) coincides with the center of the adhesive plate (72).

4. The hydrogen sensitive tape validity verification system according to claim 3, characterized in that: The diameter of the through hole (721) is smaller than the width of the hydrogen-sensitive tape to be tested.

5. The hydrogen sensitive tape validity verification system according to claim 4, characterized in that: It comprises a plurality of the supporting devices (7), and the hydrogen-sensitive tapes on all the supporting devices (7) can be observed from the transparent observation port.

6. The hydrogen sensitive tape validity verification system according to claim 1, characterized in that: A temperature sensor (15) and a second hydrogen concentration sensor (16) are provided on the side wall of the high and low temperature environment chamber (14); the temperature sensor (15) and the second hydrogen concentration sensor (16) are both connected to the control system (17).

7. A method for verifying the effectiveness of a hydrogen-sensitive tape using the system described in any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Place the hydrogen-sensitive tape to be tested on the support device (7), close the hydrogen environment chamber (6) and the high and low temperature environment chamber (14); S2. According to the hydrogen concentration requirements of the test, connect the corresponding standard gas bottle (1) to the air inlet pipe; S3. According to the temperature requirements of the test, set the temperature in the high and low temperature environment chamber (14). 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 environment chamber (6); S5. Open the manual valve (2) of the standard gas bottle (1), set the pressure reducing valve (3) and the flow controller (4) to the target pressure and flow, open the inlet valve (5), and introduce the standard gas into the hydrogen environment chamber (6); S6. Start the humidifier (19) to adjust the ambient humidity in the hydrogen environment chamber (6); S7. After the first hydrogen concentration sensor (9), the pressure sensor (10) and the humidity sensor (18) monitor that the hydrogen concentration, pressure and humidity in the hydrogen environment chamber (6) meet the test requirements, the test starts, and the control system (17) starts timing, and the color change of the hydrogen-sensitive tape is monitored in real time through the video shooting device (13).

8. The method according to claim 7, 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 exhaust valve (11) of the standard gas cylinder (1); S42. Start the vacuum pump (12), open the inlet valve (5) and the exhaust valve (11), evacuate the hydrogen environment chamber (6) to the target pressure, and then close the exhaust valve (11); S43. Then open the manual valve (2) of the standard gas bottle (1), set the pressure reducing valve (3) and the flow controller (4) to the target pressure and flow, introduce the standard gas to the hydrogen environment chamber (6) to the target pressure, close the inlet valve (5), open the exhaust valve (11), evacuate to the target pressure and then close the exhaust valve (11); S44. Repeat step S43 three or more times, turn off the vacuum pump (12), and the replacement is completed.

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

10. A method for verifying the effectiveness of a hydrogen-sensitive tape using the system described in any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Place the hydrogen-sensitive tape to be tested on the support device (7), close the hydrogen environment chamber (6) and the high and low temperature environment chamber (14); S2. According to the hydrogen concentration requirements of the test, connect the corresponding standard gas bottle (1) to the air inlet pipe; S3. According to the temperature requirements of the test, set the temperature in the high and low temperature environment chamber (14). 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 environment chamber (6); S5. Open the manual valve (2) of the standard gas cylinder (1), set the pressure reducing valve (3) and the flow controller (4) to the target pressure and flow, and open the inlet valve (5) and the outlet valve (8) in sequence; S6. After the first hydrogen concentration sensor (9) monitors that the hydrogen concentration in the hydrogen environment chamber (6) reaches the set target, the test starts, and the control system (17) starts timing, and the video shooting device (13) records the experimental process.

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