CN113217822A - Gas safety shield system of hydrogenation station - Google Patents
Gas safety shield system of hydrogenation station Download PDFInfo
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- CN113217822A CN113217822A CN202110494889.3A CN202110494889A CN113217822A CN 113217822 A CN113217822 A CN 113217822A CN 202110494889 A CN202110494889 A CN 202110494889A CN 113217822 A CN113217822 A CN 113217822A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
Abstract
The invention discloses a gas safety shield system of a hydrogen station, which aims at solving the problems that manual inspection of gas leakage in the existing hydrogen station is time-consuming and labor-consuming, quick and accurate tracing is difficult, leakage cannot be prevented timely and effectively, and certain safety risk is faced. Compared with the traditional leakage monitoring means, the method strengthens and optimizes the supervision on the micro leakage, prevents the micro leakage from happening in the bud, and saves the manual inspection cost; the safety level is improved by utilizing a three-level control mechanism, and the safety of personnel and production operation can be further ensured.
Description
Technical Field
The invention belongs to the technical field of safety management of a hydrogen refueling station, and particularly relates to a gas safety shield system of the hydrogen refueling station.
Background
The hydrogen charging station relates to key equipment or pipelines of systems such as gas discharging, pressurization, hydrogen storage, hydrogenation, diffusion and the like in the processes of storage, transportation and sale of hydrogen, and has certain potential safety hazards of gas leakage.
The hydrogen is colorless and tasteless, has strong dissipation property and low explosion limit, and is not easy to be rapidly monitored. The gas leakage monitoring content of the existing hydrogen filling station is single, the main emphasis is on utilizing combustible gas detectors based on the principles of catalytic combustion, infrared optics and the like and hydrogen detectors based on the principles of catalytic combustion, electrochemistry and the like, the monitoring and alarming on large leakage are realized, and the leakage cannot be prevented effectively in time. When the concentration change of the leaked gas in the environment is detected, the detector can transmit an electric signal to the console, and sound and light alarm is carried out according to a set alarm value, so that the sensor is required to be provided with a circuit structure part, even construction wiring is required in the installation process, and certain explosion risk exists.
Secondly, to the little leakage of equipment, pipe fitting, still stop in the stage of paining the soap water and using the monitoring of hand-held type detector, need personnel to examine at the scene ceaselessly, especially the narrow and small region in space, especially portable or sled dress formula hydrogenation station, the easy leakage point is many, and the manual work is patrolled and examined and is wasted time and energy, difficult quick accurate traceability, and information transfer also needs certain time, and field work personnel still need face certain safety risk simultaneously.
In addition, the application of various gas leakage monitoring devices of the existing hydrogen filling station is not clear, and inconvenience is brought to an emergency risk removing mechanism and daily management. If the grading monitoring and effective cooperation among various monitoring devices can be realized, the omnibearing dead-angle-free monitoring of the gas leakage of the hydrogenation station can be gradually realized, and the timeliness and the management efficiency can be greatly improved.
Disclosure of Invention
The invention aims to provide a gas safety shield system of a hydrogen station, which adopts a three-level control mechanism, can refine the monitoring range and content of equipment, optimize an emergency danger removal management mode, monitor combustible gas leakage in real time within 24 hours, remarkably improve timeliness and management efficiency and ensure the safety of personnel and production operation.
In order to solve the problems, the technical scheme of the invention is as follows:
a gas safety shield system of a hydrogen station comprises a hydrogen micro-leakage monitoring and early warning module, a hydrogen detection and alarm module and a combustible gas detection and alarm module;
the hydrogen micro-leakage monitoring and early warning module monitors and early warns hydrogen leakage below 100ml/min of the hydrogen station based on a hydrogen sensitive color change sensing patch and an image recognition technology;
the hydrogen detection alarm module adopts a hydrogen detector to monitor and early warn the hydrogen leakage of the hydrogenation station at 100 ml/min-1000 ml/min;
the combustible gas detection alarm module monitors and warns hydrogen leakage of the hydrogen station above 1000ml/min based on the fixed combustible gas detector group.
According to one embodiment of the invention, the hydrogen micro-leakage monitoring and early warning module comprises a hydrogen sensitive color change sensing patch, a light source and an image collector;
the hydrogen sensitive color-changing sensing patch is adhered to a flange, a valve and a pipeline interface on a hydrogen pipeline, the hydrogen concentration on the surface of the hydrogen pipeline is detected in real time, and the displayed color is changed according to the hydrogen concentration;
the light source is used for illuminating the hydrogen sensitive color change sensing patch;
the image collector is used for collecting images of the area where the hydrogen sensitive color change sensing patch is located in real time, and transmitting the collected images to the upper computer to judge hydrogen leakage, so that the upper computer gives an early warning through a short message to prompt hydrogen leakage.
According to one embodiment of the invention, the hydrogen-sensitive color-change sensing patch comprises a detection area and a control area;
the detection area changes color when meeting hydrogen, and the contrast area does not change color when meeting hydrogen.
According to one embodiment of the invention, the hydrogen-sensitive color-change sensing patch comprises a packaging layer, a color-change layer, a hydrogen-sensitive catalytic layer, a substrate layer and an inert layer;
the base layer is arranged on the hydrogen pipeline and has air permeability;
the inert layer and the hydrogen-sensitive catalytic layer are positioned above the substrate layer, and a barrier layer is arranged between the inert layer and the hydrogen-sensitive catalytic layer;
the color changing layer is positioned above the inert layer and the hydrogen sensitive catalysis layer, and the barrier layer penetrates through the color changing layer;
the packaging layer is positioned above the color changing layer and has light transmittance;
the detection area comprises an encapsulation layer, a color-changing layer, a hydrogen sensitive catalysis layer and a basal layer, and the contrast area comprises an encapsulation layer, a color-changing layer, an inert layer and a basal layer.
According to an embodiment of the invention, the substrate layer is made of a polytetrafluoroethylene material;
the hydrogen-sensitive catalytic layer is made of platinum material and can perform catalytic reaction with hydrogen penetrating through the substrate layer;
the inert layer is made of a titanium material and does not perform catalytic reaction with hydrogen penetrating through the substrate layer;
the barrier layer is made of glass fiber and isolates gas;
the color-changing layer is made of a color-changing nano material, and reacts with the catalyzed hydrogen to change the color of the color-changing layer.
According to an embodiment of the present invention, the hydrogen detection alarm module includes a hydrogen detector;
the hydrogen detector is arranged at the joint of the hydrogen pipeline, detects the hydrogen concentration at a fixed frequency, uploads the hydrogen concentration, the position and time information and transmits the information to the upper computer;
and when the detected hydrogen concentration exceeds the preset concentration, performing sound and light alarm to prompt hydrogen leakage.
According to one embodiment of the invention, the combustible gas detection alarm module comprises a plurality of combustible gas detectors;
the plurality of combustible gas detectors are distributed at each gas monitoring point in the hydrogen station, detect the concentration of combustible gas at a preset frequency and upload monitoring information including the type of gas, the concentration of gas, time and the gas monitoring points to an upper computer;
and when the detected combustible gas concentration exceeds the preset concentration, performing sound and light alarm to prompt the leakage of the combustible gas.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1) according to the gas safety shield system for the hydrogenation station, provided by the embodiment of the invention, aiming at the problems that manual inspection of gas leakage in the conventional hydrogenation station is time-consuming and labor-consuming, rapid and accurate tracing is difficult, leakage cannot be prevented timely and effectively, and certain safety risk is faced, rapid monitoring, accurate tracing and effective management of micro leakage are realized through a hydrogen sensitive color change sensing patch and an image recognition technology, meanwhile, a three-level management and control mechanism for gas leakage monitoring is adopted, the monitoring range and content of equipment are refined, an emergency risk removal management mode is optimized, and the timeliness and the management efficiency are obviously improved. Compared with the traditional leakage monitoring means, the method strengthens and optimizes the supervision on the micro leakage, prevents the micro leakage from happening in the bud, and saves the manual inspection cost; the safety level is improved by utilizing a three-level control mechanism, and the safety of personnel and production operation can be further ensured.
2) According to the gas safety shield system for the hydrogenation station, disclosed by the embodiment of the invention, the hydrogen sensitive color change sensing patch and the visual identification technology are combined, so that the accurate identification traceability of the micro leakage of equipment and pipelines is realized, especially in a narrow space, the timeliness and the accuracy are improved, the labor cost is saved, and the potential safety risk is reduced. Particularly, the system can be combined with the existing monitoring camera of the hydrogen station, so that the upgrading and reconstruction cost is further reduced.
3) In the gas safety shield system of the hydrogen refueling station in the embodiment of the invention, the light source is arranged near the hydrogen sensitive color change sensing patch, so that the image collector can be ensured to clearly capture the color change of the hydrogen sensitive color change sensing patch in real time.
4) According to the hydrogen station gas safety shield system in the embodiment of the invention, the detection area and the contrast area are arranged in the hydrogen sensitive color change sensing patch, and the image acquired by the image acquisition unit can be clearly and directly distinguished from the image if hydrogen gas leaks, so that the hydrogen gas safety shield system is simple and clear, and the process of judging the hydrogen gas leakage is simplified.
Drawings
FIG. 1 is a schematic view of a hydrogen station gas safety shield system in an embodiment of the present invention;
fig. 2 is a block diagram of a hydrogen micro-leakage monitoring and warning module according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a hydrogen-sensitive color-change sensor patch according to an embodiment of the present invention.
Description of reference numerals:
1: a hydrogen station; 2: a monitoring system; 201: a hydrogen micro-leakage monitoring and early warning module; 211: a hydrogen sensitive color change sensing patch; 221: a packaging layer; 222: a color-changing layer; 223: a hydrogen sensitive catalytic layer; 224: a base layer; 225: an inert layer; 226: a barrier layer; 212: a light source; 213: an image collector; 202: a hydrogen detection alarm module; 203: a combustible gas detection alarm module; 3: and (4) an upper computer.
Detailed Description
The invention provides a gas safety shield system of a hydrogen adding station, which is further described in detail by combining the attached drawings and specific examples. Advantages and features of the present invention will become apparent from the following description and from the claims.
This embodiment adopts the manual work to patrol and examine gas leakage time consuming to difficultly, be difficult for quick accurate tracing to the source to present hydrogenation station, can't in time effectively prevent to leak, still face the problem of certain safe risk simultaneously, the gaseous safety shield system of hydrogenation station that provides, through based on quick look change sensing paster of hydrogen and image recognition technology, realize the quick monitoring to little leakage, accurate tracing to the source and effective management, adopt the tertiary management and control mechanism of gas leakage monitoring simultaneously, refine equipment monitoring range and content, optimize emergent except that dangerous management mode, show improvement timeliness and managerial efficiency. Compared with the traditional leakage monitoring means, the method strengthens and optimizes the supervision on the micro leakage, prevents the micro leakage from happening in the bud, and saves the manual inspection cost; the safety level is improved by utilizing a three-level control mechanism, and the safety of personnel and production operation can be further ensured.
Specifically, referring to fig. 1, the hydrogen station gas safety shield system (i.e., the monitoring system 2) includes a hydrogen micro-leakage monitoring and early-warning module 201, a hydrogen detection and alarm module 202, and a combustible gas detection and alarm module 203. The hydrogen micro-leakage monitoring and early warning module 201 monitors and early warns hydrogen leakage below 100ml/min of the hydrogen station based on a hydrogen sensitive color change sensing patch and an image recognition technology; the hydrogen detection alarm module 202 adopts a hydrogen detector to monitor and early warn the hydrogen leakage of the hydrogenation station at 100 ml/min-1000 ml/min; the combustible gas detection alarm module 203 monitors and warns hydrogen leakage of the hydrogen station above 1000ml/min based on the fixed combustible gas detector group.
The hydrogen station gas safety shield system adopts three-level management and control mechanisms of a hydrogen micro-leakage monitoring and early warning module 201, a hydrogen detection and alarm module 202 and a combustible gas detection and alarm module 203, can subdivide a monitoring area, monitoring gas and gas concentration, optimizes an emergency danger removal management mode, and obviously improves timeliness and management efficiency.
The hydrogen micro-leakage monitoring and early warning module 201 includes a hydrogen sensitive color-change sensing patch 211, a light source 212 and an image collector 213, please refer to fig. 2. This hydrogen sensitive look becomes sensing paster 211 can paste on the hydrogen pipeline, especially the easy area that leaks of hydrogen such as flange, pipe valve spare, high-pressure equipment, filling end provides light source 212 in the place that guarantees safe distance to ensure the hydrogen sensitive look that image acquisition ware 213 can catch in real time and become the color variation of sensing paster, transmit image information to host computer 3 and be convenient for the management system of hydrogen station and transfer and the analysis. The management system analyzes a data result in the detection range of the hydrogen-sensitive color-change sensing patch, and if the data result shows that hydrogen leakage exists, short message early warning is carried out on a manager and field workers to prompt overhaul and troubleshooting, so that the situation of slight leakage is prevented, and the occurrence of large leakage is avoided.
Specifically, the hydrogen-sensitive color-change sensing patch 211 detects the hydrogen concentration on the surface of the hydrogen pipeline in real time, and changes the displayed color according to the hydrogen concentration. The hydrogen sensitive color-changing sensing patch 211 comprises a detection area and a contrast area, wherein the detection area changes color when meeting hydrogen, and the contrast area does not change color when meeting hydrogen. Through the detection area and the contrast area, if hydrogen leaks, the hydrogen leakage can be clearly and directly distinguished from the image, the detection area and the contrast area are simple and clear, the process of judging the hydrogen leakage is simplified, and the system detection time is shortened.
The hydrogen-sensitive color-change sensing patch 211 is shown in fig. 3. The hydrogen sensitive color-changing sensing patch comprises a packaging layer 221, a color-changing layer 222, a hydrogen sensitive catalytic layer 223, a substrate layer 224 and an inert layer 225. Wherein, the substrate layer 221 is disposed on the hydrogen pipeline and has air permeability; the inert layer 225 and the hydrogen-sensitive catalytic layer 223 are positioned above the substrate layer 221, and a barrier layer 226 is arranged between the inert layer 225 and the hydrogen-sensitive catalytic layer 223; the color changing layer 222 is positioned above the inert layer 225 and the hydrogen sensitive catalytic layer 223, and is penetrated by the barrier layer 226; the encapsulation layer 221 is located above the color-changing layer 222 and has light transmittance. The detection area of the hydrogen sensitive color-changing sensing patch comprises a packaging layer 221, a color-changing layer 222, a hydrogen sensitive catalytic layer 223 and a substrate layer 224, and the contrast area comprises the packaging layer 221, the color-changing layer 222, an inert layer 225 and the substrate layer 224; the detection area changes color when meeting hydrogen, and the contrast area does not change color when meeting hydrogen.
In practical application, the substrate layer 221 may be made of an organic polymer material with good air permeability, so that the hydrogen-sensitive color change sensing patch can capture leaked hydrogen in time, and a preferable substrate material is polytetrafluoroethylene.
The hydrogen sensitive catalyst layer 223 may catalytically react with hydrogen gas entering through the substrate layer 221 while ensuring that the catalyzed hydrogen gas can react with the discoloration layer 222 above the hydrogen sensitive catalyst layer 223. The hydrogen-sensitive catalytic layer may be made of a platinum material, a preferred material being metallic platinum.
The inert layer 225 is formed in contrast to the hydrogen sensitive catalytic layer 223, does not catalytically react with hydrogen gas, and is spaced apart from the hydrogen sensitive catalytic layer 223 by a barrier layer 226 to prevent the hydrogen catalyzed reaction from affecting the discoloring layer 222 above the inert layer 225, which is preferably made of metallic titanium. Additionally, the barrier layer 226 may be made of glass fiber to insulate against gases.
The color-changing layer 222 can react with hydrogen catalyzed by the hydrogen-sensitive catalyst layer 223, so as to change the color thereof, and further can be captured and processed by the image collector in time. The preferred color-changing material is metallic yttrium.
The packaging layer 221 can isolate the outside air, and prevent the color-changing material from being oxidized and losing efficacy; meanwhile, the encapsulation layer 221 has good light transmittance, and can ensure that the color of the color-changing material is captured in time. The preferred encapsulating material is fiberglass.
In order to ensure that the image collector 213 can clearly capture the color change of the hydrogen-sensitive color change sensing patch 211 in real time, the present embodiment arranges a light source 212 near the hydrogen-sensitive color change sensing patch 211 to illuminate the hydrogen-sensitive color change sensing patch 211. The light source 212 may be an incandescent lamp or may be a white light emitting LED lamp.
The image collector 213 collects an image of the area where the hydrogen sensitive color change sensing patch 211 is located in real time, and transmits the collected image to the upper computer 3. The image collector 213 may be a camera or a high-definition camera.
The upper computer 3 judges whether hydrogen leakage exists in the acquired image, and if hydrogen leakage exists in the acquired image, short message early warning is carried out on a manager and field workers to prompt overhaul and investigation, so that the situation that large leakage occurs is avoided. In judging whether or not there is a hydrogen gas leak, it can be performed with reference to table 1.
TABLE 1
Table 1 above shows the situation that the hydrogen-sensitive color-change sensor patch changes color with the increase of hydrogen concentration under natural illumination, the color-changing material in the hydrogen-sensitive color-change sensor patch reacts with hydrogen catalyzed by the platinum-based metal material at normal temperature and normal pressure, and the color of the color-changing material gradually deepens with the increase of hydrogen concentration.
The hydrogen detection alarm module 202 comprises a plurality of hydrogen detectors, the hydrogen detectors are arranged at key point positions (such as key equipment or pipelines of a hydrogen station for discharging, pressurizing, storing hydrogen, hydrogenating, diffusing and the like in the processes of storing, transporting and selling hydrogen), can upload information such as gas concentration, point positions, time and the like at fixed frequency (such as 30 s/time), immediately send out sound and light alarms once leakage reaches a set risk level, and transmit monitoring information to the upper computer 3 to remind an operator to take safety handling measures in time.
The combustible gas detection alarm module 203 comprises a plurality of combustible gas detectors which are distributed at each gas monitoring point in the hydrogen station, detect the concentration of the combustible gas at a preset frequency (such as 1 s/time) and upload monitoring information including the type of the gas, the concentration of the gas, the time and the gas monitoring points to the upper computer 3; when the detected combustible gas concentration exceeds the preset concentration, sound and light alarm is carried out to prompt the combustible gas leakage, and information such as gas type, concentration, time, point location and the like is transmitted to the upper computer 3 in time.
The gaseous safety shield system of hydrogenation station that this embodiment provided, adopt the manual work to patrol and examine gas leakage to take time hard to, be difficult for quick accurate tracing to the source to present hydrogenation station, can't in time effectively prevent to leak, still face the problem of certain safe risk simultaneously, through based on quick look change sensing paster of hydrogen and image recognition technology, realize the quick monitoring to little leakage, accurate tracing to the source and effective management, adopt the tertiary management and control mechanism of gas leakage monitoring simultaneously, refine equipment monitoring range and content, optimize emergent danger removal management mode, show improvement timeliness and managerial efficiency. Compared with the traditional leakage monitoring means, the method strengthens and optimizes the supervision on the micro leakage, prevents the micro leakage from happening in the bud, and saves the manual inspection cost; the safety level is improved by utilizing a three-level control mechanism, and the safety of personnel and production operation can be further ensured. The hydrogen sensitive color change sensing patch is combined with the visual identification technology, so that accurate identification traceability of micro leakage of equipment and pipelines is realized, particularly narrow space is realized, timeliness and accuracy are improved, labor cost is saved, and potential safety risk is reduced. Particularly, the system can be combined with the existing monitoring camera of the hydrogen station, so that the upgrading and reconstruction cost is further reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (7)
1. A hydrogen station gas safety shield system is characterized by comprising a hydrogen micro-leakage monitoring and early warning module, a hydrogen detection and alarm module and a combustible gas detection and alarm module;
the hydrogen micro-leakage monitoring and early warning module monitors and early warns hydrogen leakage below 100ml/min of the hydrogen station based on a hydrogen sensitive color change sensing patch and an image recognition technology;
the hydrogen detection alarm module adopts a hydrogen detector to monitor and early warn the hydrogen leakage of the hydrogenation station at 100 ml/min-1000 ml/min;
the combustible gas detection alarm module monitors and warns hydrogen leakage of the hydrogen station above 1000ml/min based on the fixed combustible gas detector group.
2. The hydrogen station gas safety shield system according to claim 1, wherein the hydrogen micro-leakage monitoring and early-warning module comprises a hydrogen sensitive color change sensing patch, a light source and an image collector;
the hydrogen sensitive color-changing sensing patch is adhered to a flange, a valve and a pipeline interface on a hydrogen pipeline, the hydrogen concentration on the surface of the hydrogen pipeline is detected in real time, and the displayed color is changed according to the hydrogen concentration;
the light source is used for illuminating the hydrogen sensitive color change sensing patch;
the image collector is used for collecting images of the area where the hydrogen sensitive color change sensing patch is located in real time, and transmitting the collected images to the upper computer to judge hydrogen leakage, so that the upper computer gives an early warning through a short message to prompt hydrogen leakage.
3. The hydrogen station gas safety shield system of claim 2, wherein the hydrogen sensitive color change sensor patch comprises a detection zone and a control zone;
the detection area changes color when meeting hydrogen, and the contrast area does not change color when meeting hydrogen.
4. The hydrogen station gas safety shield system of claim 2, wherein the hydrogen sensitive color change sensing patch comprises an encapsulation layer, a color change layer, a hydrogen sensitive catalytic layer, a base layer, and an inert layer;
the base layer is arranged on the hydrogen pipeline and has air permeability;
the inert layer and the hydrogen-sensitive catalytic layer are positioned above the substrate layer, and a barrier layer is arranged between the inert layer and the hydrogen-sensitive catalytic layer;
the color changing layer is positioned above the inert layer and the hydrogen sensitive catalysis layer, and the barrier layer penetrates through the color changing layer;
the packaging layer is positioned above the color changing layer and has light transmittance;
the detection area comprises an encapsulation layer, a color-changing layer, a hydrogen sensitive catalysis layer and a basal layer, and the contrast area comprises an encapsulation layer, a color-changing layer, an inert layer and a basal layer.
5. The hydrogen station gas safety shield system of claim 4, wherein the substrate layer is made of a polytetrafluoroethylene material;
the hydrogen-sensitive catalytic layer is made of platinum material and can perform catalytic reaction with hydrogen penetrating through the substrate layer;
the inert layer is made of a titanium material and does not perform catalytic reaction with hydrogen penetrating through the substrate layer;
the barrier layer is made of glass fiber and isolates gas;
the color-changing layer is made of a color-changing nano material, and reacts with the catalyzed hydrogen to change the color of the color-changing layer.
6. The hydrogen station gas safety shield system of claim 1, wherein the hydrogen detection alarm module comprises a hydrogen detector;
the hydrogen detector is arranged at the joint of the hydrogen pipeline, detects the hydrogen concentration at a fixed frequency, uploads the hydrogen concentration, the position and time information and transmits the information to the upper computer;
and when the detected hydrogen concentration exceeds the preset concentration, performing sound and light alarm to prompt hydrogen leakage.
7. The hydrogen station gas safety shield system of claim 1, wherein the combustible gas detection alarm module comprises a plurality of combustible gas detectors;
the plurality of combustible gas detectors are distributed at each gas monitoring point in the hydrogen station, detect the concentration of combustible gas at a preset frequency and upload monitoring information including the type of gas, the concentration of gas, time and the gas monitoring points to an upper computer;
and when the detected combustible gas concentration exceeds the preset concentration, performing sound and light alarm to prompt the leakage of the combustible gas.
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| CN114484287A (en) * | 2022-02-11 | 2022-05-13 | 内蒙古中科装备有限公司 | Hydrogenation station gas safety control method and device, computer equipment and storage medium |
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| CN112649161A (en) * | 2020-11-27 | 2021-04-13 | 宝武清洁能源有限公司 | Gas-sensitive color change sensor and hydrogenation station safety shield system based on gas-sensitive color change sensor |
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| CN113970070A (en) * | 2021-09-28 | 2022-01-25 | 北京格睿能源科技有限公司 | Method and device for detecting and positioning hydrogen leakage of liquid hydrogen and cryogenic gas |
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