Hydrogen production monitoring system

Abstract

The invention provides a hydrogen production monitoring system, which is applied to a hydrogen production system and comprises a corrosion signal acquisition module, a hydrogen leakage monitoring module, a strain monitoring module, an information processing module and an upper computer, the information processing module is respectively connected with the corrosion signal acquisition module, the hydrogen leakage monitoring module, the strain monitoring module and the upper computer; the corrosion signal acquisition module is used for measuring thickness information of the electrolytic bath, the hydrogen pipeline and the oxygen pipeline; the hydrogen leakage monitoring module is used for detecting the hydrogen leakage amount of the hydrogen pipeline and a sound wave signal generated by leaked hydrogen; the strain monitoring module is used for detecting optical signals in optical fibers of the hydrogen pipeline and the oxygen pipeline; and the information processing module sends the processed thickness information, hydrogen leakage rate, sound wave signals and strain state information of each pipeline to an upper computer. The running state of the hydrogen production system can be monitored in real time, and the safety and stability of the hydrogen production system in the hydrogen preparation process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy, and in particular to a hydrogen production monitoring system. Background Art

[0002] Under the current development background of low-carbon energy, hydrogen energy, as a clean and low-carbon energy, has the characteristics of being clean, pollution-free, and efficient, and is an ideal power source.

[0003] Hydrogen production equipment is one of the key technical equipment for realizing large-scale renewable energy hydrogen production. The corrosion condition of hydrogen production equipment is a key factor affecting the service life of hydrogen production equipment and its long-term safe operation. At present, the corrosion monitoring of hydrogen production equipment mainly focuses on the analysis of the corrosion mechanism of equipment materials and local detection, that is, only the stage of considering the design safety of the equipment itself. However, there are still gaps in the long-term real-time monitoring of corrosion conditions in the prior art, mainly relying on regular inspections and post-event analysis. Due to the physical and chemical properties of hydrogen: colorless, odorless, flammable, and easy to penetrate, it is extremely easy to penetrate and leak during actual use, and will explode when encountering heat or an open flame. Therefore, monitoring hydrogen leakage is crucial for ensuring the safe use of hydrogen energy. How to quickly and accurately monitor the corrosion condition, hydrogen leakage flow rate, and leakage location of the hydrogen production system to improve the real-time monitoring ability of the hydrogen production test system is an urgent problem to be solved in the hydrogen production system.

[0004] Although there are many types of current monitoring technologies, the monitoring systems in the prior art have problems such as insufficient real-time performance, limited monitoring range, and insufficient data processing ability. The existing monitoring systems can only monitor the state of the hydrogen production device, and cannot monitor whether the hydrogen production equipment is corroded or leaked during operation. Moreover, the response speed to sudden hydrogen leakage events is slow, and it cannot quickly monitor and give early warnings. In addition, some monitoring technologies are only applicable to specific scenarios (such as detecting the hydrogen leakage of hydrogen storage cylinders before and after a collision test) or local hydrogen production systems, and it is difficult to cover the entire hydrogen production system for monitoring under normal working conditions. At the same time, a large amount of monitoring data has not been effectively utilized, and it is difficult to accurately locate the leakage source.

[0005] This section aims to provide background or context for the embodiments of the present invention described in the claims. The description herein is not admitted to be prior art merely because it is included in this section. Summary of the Invention

[0006] The embodiments of the present invention provide a hydrogen production monitoring system for real-time monitoring of the operating state of the hydrogen production system, improving the safety and stability of the hydrogen production system during the hydrogen production process, and avoiding hydrogen production equipment failures caused by abnormal conditions such as pipeline corrosion, hydrogen leakage, and hydrogen embrittlement.

[0007] The hydrogen production monitoring system is applied to a hydrogen production system, which includes an electrolyzer, a cooling system, a hydrogen drying and purification system, an oxygen treatment system, and a hydrogen storage tank. The cooling system is respectively connected to the electrolyzer and the hydrogen drying and purification system through a plurality of coolant pipelines. The hydrogen drying and purification system is respectively connected to the electrolyzer and the hydrogen storage tank through a plurality of hydrogen pipelines. The electrolyzer is connected to the oxygen treatment system through a plurality of oxygen pipelines. The hydrogen production monitoring system includes a corrosion signal acquisition module, a hydrogen leakage monitoring module, a strain monitoring module, an information processing module, and a host computer.

[0008] The information processing module is respectively connected to the corrosion signal acquisition module, the hydrogen leakage monitoring module, the strain monitoring module, and the host computer.

[0009] The corrosion signal acquisition module is used to measure the thickness information of the electrolyzer, the hydrogen pipelines, and the oxygen pipelines.

[0010] The hydrogen leakage monitoring module is used to detect the hydrogen leakage amount of the hydrogen pipelines and the acoustic wave signals generated by the leaked hydrogen.

[0011] The strain monitoring module is used to detect the optical signals in the optical fibers of the hydrogen pipelines and the oxygen pipelines.

[0012] The information processing module performs signal processing on the received thickness information, hydrogen leakage amount, acoustic wave signals, and optical signals, and sends the processed thickness information, hydrogen leakage amount, acoustic wave signals, and the strain state information of each pipeline to the host computer.

[0013] In one embodiment, the corrosion signal acquisition module includes a plurality of corrosion monitoring sensors for measuring the thickness information of the electrolyzer, the hydrogen pipelines, and the oxygen pipelines. The information processing module includes a first detection module, and the first detection module is respectively connected to the plurality of corrosion monitoring sensors.

[0014] During the monitoring process, the first detection module sends electromagnetic ultrasonic signals to the corrosion monitoring sensors at a preset time interval. When the corrosion monitoring sensors receive the electromagnetic ultrasonic signals, they upload the measured thickness information to the first detection module.

[0015] In one embodiment, positioning chips are arranged inside the plurality of corrosion monitoring sensors to locate the leakage source position in real time.

[0016] In one embodiment, the hydrogen leakage monitoring module includes a plurality of hydrogen leakage monitoring sensors for detecting the hydrogen leakage amount.

[0017] The information processing module further includes the second detection module, and the second detection module is connected to the hydrogen leakage monitoring sensor;

[0018] When the hydrogen leakage monitoring sensor detects that the hydrogen leakage amount reaches a preset threshold, a voltage signal is generated and transmitted to the second detection module.

[0019] In one embodiment, the corrosion monitoring sensors are respectively arranged inside the electrolytic cell, outside the hydrogen pipeline and outside the oxygen pipeline; the corrosion monitoring sensors are respectively fixed on the hydrogen pipeline and the oxygen pipeline through a clamp structure.

[0020] In one embodiment, the hydrogen leakage monitoring sensor is respectively fixed on the hydrogen pipeline through a clamp structure.

[0021] In one embodiment, the hydrogen leakage monitoring module further includes a plurality of microphone arrays, and the microphone arrays are arranged on the hydrogen pipeline and the oxygen pipeline; the microphone arrays are connected to the second detection module;

[0022] The microphone array is used to detect the acoustic wave signal and transmit the acoustic wave signal to the second detection module.

[0023] In one embodiment, the strain monitoring module includes an optical fiber strain sensor, and the optical fiber strain sensor is wound and laid along the hydrogen pipeline and the oxygen pipeline to detect the optical signal in the optical fiber; the information processing module further includes a third detection module, and the third detection module is connected to the optical fiber strain sensor;

[0024] When the hydrogen pipeline and the oxygen pipeline are strained, the third detection module performs optical signal processing on the spectrum and frequency of the optical signal to obtain the strain state information of each pipeline.

[0025] In one embodiment, the hydrogen production monitoring system further includes: an equipment status monitoring module; the equipment status monitoring module is connected to the information processing module;

[0026] The equipment status monitoring module includes: a hydrogen-in-oxygen sensor, an oxygen-in-hydrogen sensor, a flow sensor, a voltage sensor and a liquid level sensor;

[0027] Among them, the hydrogen-in-oxygen sensor and the oxygen-in-hydrogen sensor are both arranged in the electrolytic cell. The hydrogen-in-oxygen sensor is used to detect the content ratio of hydrogen to oxygen during the hydrogen-oxygen separation process; the oxygen-in-hydrogen sensor is used to detect the content ratio of oxygen to hydrogen during the hydrogen-oxygen separation process; the flow sensor is arranged inside the hydrogen pipeline and the oxygen pipeline, and is used to detect the hydrogen flow rate and oxygen flow rate in the pipeline; the voltage sensor is arranged at both ends of the electrolytic cell and is used to detect the voltage inside the electrolytic cell; the liquid level sensor is arranged inside the electrolytic cell and is used to detect the liquid level in the electrolytic cell to balance the electrolytic cell liquid level.

[0028] In one embodiment, the hydrogen production monitoring system further includes: the environmental monitoring module, the security alarm module, and the video monitoring module; the information processing module is respectively connected to the environmental monitoring module, the security alarm module, and the video monitoring module;

[0029] The environmental monitoring module includes a temperature sensor and a humidity sensor, and is used to monitor the temperature and humidity in the hydrogen production workshop; the security alarm module includes a plurality of alarms, which are used to receive the alarm information from the upper computer and give an alarm. The alarms are respectively arranged at the access control and door magnets of the hydrogen production workshop; the video monitoring module includes a plurality of camera devices for real-time monitoring of the hydrogen production workshop.

[0030] In one embodiment, the hydrogen leakage monitoring module further includes a hydrogen content monitor for monitoring the hydrogen concentration in the hydrogen production workshop.

[0031] In one embodiment, if the upper computer determines that the thickness information exceeds the alarm threshold, it generates alarm information and draws a pipeline corrosion change curve based on the real-time thickness information to obtain the trend information of corrosion monitoring.

[0032] In one embodiment, the hydrogen production monitoring system further includes: a first network switch and a second network switch; the information processing module is connected to the upper computer through the first network switch and the second network switch in sequence.

[0033] In one embodiment, a first arc-shaped clamp, a sensor housing, a second arc-shaped clamp, a clamp fastening adjustment device, and a sensor lead post arranged on the first arc-shaped clamp or the second arc-shaped clamp;

[0034] The first arc-shaped clamp and the second arc-shaped clamp are cooperatively clamped and fixed on the hydrogen pipeline and / or the oxygen pipeline; the sensor housing is provided with a convex part, and the first arc-shaped clamp and the second arc-shaped clamp clamp the convex part and are fixed to the sensor housing; the first arc-shaped clamp includes a first arc-shaped component and a second arc-shaped component, and the first arc-shaped component and the second arc-shaped component are rotationally connected through the clamp fastening adjustment device.

[0035] In one embodiment, the clamp fastening and adjusting device includes a rotating shaft, a first fastening fastener, a second fastening fastener, a nut and a fastener;

[0036] A circular through-hole is provided on the connecting portion of the first fastening fastener, and a first through-hole is provided on the main body portion of the first fastening fastener; a second through-hole is provided on the connecting portion of the second fastening fastener, and a third through-hole is provided on the main body portion of the second fastening fastener;

[0037] The rotating shaft is fixed on the first arc-shaped clamp, the connecting portion of the first fastening fastener is sleeved on the rotating shaft through the circular through-hole, and the first fastening fastener and the second fastening fastener are respectively sleeved on the nut through the corresponding first through-hole and the third through-hole in sequence; the connecting portion of the second fastening fastener is sleeved on the fastener through the second through-hole;

[0038] By adjusting the distance between the nut and the first arc-shaped clamp, the relative distance between the first fastening fastener and the second fastening fastener is adjusted to adjust the fastening state of the clamp structure.

[0039] The hydrogen production monitoring system provided by the embodiment of the present invention realizes full-coverage monitoring of the hydrogen production system through a corrosion signal acquisition module, a hydrogen leakage monitoring module, a strain monitoring module, an environmental monitoring module and a security alarm module. The corrosion signal acquisition module uses a flexible ultrasonic sensor to real-time monitor the thickness changes of each pipeline, hydrogen storage tank and electrolytic cell wall of the hydrogen production system, and analyzes the thickness information through a host computer, which can early warn potential corrosion conditions in the hydrogen production system, prevent hydrogen embrittlement or material corrosion caused by the long-term operation of the hydrogen production system, and improve the service life of the hydrogen production equipment. The hydrogen leakage monitoring module combines a near-field hydrogen-sensitive sensor with a far-field microphone array to realize omnidirectional hydrogen leakage monitoring in the hydrogen production workshop. The near-field hydrogen-sensitive sensor can quickly detect changes in hydrogen concentration, while the far-field microphone array can capture tiny hydrogen leakage signals, improving the accuracy and sensitivity of hydrogen leakage monitoring. The strain monitoring module based on fiber optic sensing uses fiber Bragg grating technology to realize real-time stress and deformation monitoring of hydrogen pipelines and oxygen pipelines, and can early detect pressure changes inside the pipelines or pipeline structure deformation caused by mechanical stress outside the pipelines, so as to take corresponding maintenance measures before the pipelines rupture or leak. In addition, the present invention fixes various sensors through a clamp-type fixing structure, ensuring that the sensors can closely fit the surface of the pipeline, and can adapt to pipelines with different diameters, facilitating the replacement and maintenance of the sensors, and improving the operability and adaptability of sensor installation. Description of the Drawings

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In the drawings:

[0041] Figure 1 It is a schematic structural diagram of a hydrogen production monitoring system in an embodiment of the present invention;

[0042] Figure 2 It is a schematic physical structure diagram of a clamp structure in an embodiment of the present invention;

[0043] Figure 3 It is a schematic physical structure diagram of a clamp fastening and adjusting device in an embodiment of the present invention;

[0044] Figure 4 It is a schematic structural diagram of a hydrogen production monitoring system in another embodiment of the present invention. Detailed implementation manners

[0045] In order to enable those skilled in the art to better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present application here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0047] In this application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation.

[0048] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0049] In addition, the terms "install", "set", "provided with", "connect", "connected", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will detail this application with reference to the drawings and in combination with the embodiments.

[0051] To achieve multi-dimensional perception full-coverage real-time monitoring of the hydrogen production system, namely corrosion monitoring, leakage monitoring, strain real-time monitoring, equipment status monitoring, environmental security monitoring, and video monitoring of the hydrogen production workshop, etc. The present invention proposes a hydrogen production monitoring system. The thickness change of each pipeline in the hydrogen production workshop is monitored in real time through a corrosion monitoring sensor. A combination of near-field monitoring and far-field monitoring is used to monitor whether there is hydrogen leakage in the hydrogen production workshop. Near-field monitoring monitors the hydrogen leakage amount of each pipeline in the hydrogen production workshop through a hydrogen-sensitive sensor, and far-field monitoring detects the acoustic signals in the hydrogen production workshop through a microphone array to accurately locate the leakage point. The optical fiber strain sensor is wound and laid along each pipeline in the hydrogen production workshop, and a laser signal generator is used to monitor the strain state of the pipelines in the hydrogen production workshop, ensuring the safe operation of the hydrogen production system, achieving all-round real-time monitoring of the hydrogen production system, and improving the safety of the hydrogen production system.

[0052] The hydrogen production system of the present invention includes: an electrolytic cell, a cooling system, a hydrogen drying and purification system, an oxygen treatment system, and a hydrogen storage tank. The cooling system is connected to the electrolytic cell and the hydrogen drying and purification system respectively through a plurality of coolant pipelines. The hydrogen drying and purification system is connected to the electrolytic cell and the hydrogen storage tank respectively through a plurality of hydrogen pipelines. The electrolytic cell is connected to the oxygen treatment system through a plurality of oxygen pipelines.

[0053] The hydrogen production system of the present invention adopts a Proton Exchange Membrane (PEM) electrolytic water hydrogen production system. The electrolytic cell, the cooling system, the hydrogen drying and purification system, and the oxygen treatment system adopt a skid-mounted structure and are integrally installed in the hydrogen production workshop.

[0054] In one embodiment, the cooling system includes a plurality of coolant pipelines, a coolant storage tank, a cooling pump, a heat exchanger, etc. The hydrogen drying and purification system includes a drying tower, an adsorption material, a Pressure Swing Adsorption (PSA) system, etc. The hydrogen drying and purification system is used to remove moisture and other impurities in hydrogen to ensure high purity of hydrogen. The oxygen treatment system includes an oxygen cooler, a dehydration device, an exhaust pipeline, etc. The hydrogen storage tank adopts a high-pressure hydrogen storage tank, which is used to receive and store hydrogen and can withstand a pressure of 35 MPa to 70 MPa.

[0055] Specifically, the electrolytic cell is connected to the hydrogen drying and purification system through a plurality of hydrogen pipelines for transporting the produced hydrogen; and is connected to the oxygen treatment system through a plurality of oxygen pipelines for transporting the byproduct oxygen. The cooling system is connected to the electrolytic cell through a plurality of coolant pipelines to maintain the temperature stability in the electrolytic cell and prevent the electrolytic cell from affecting the electrolysis reaction rate due to overheating or damaging the electrolytic cell components. The cooling system is also connected to the hydrogen drying and purification system through a plurality of coolant pipelines to control the temperature of the hydrogen drying and purification system and prevent side reactions such as hydrogen explosion at high temperatures. The hydrogen drying and purification system is connected to a plurality of hydrogen storage tanks respectively through a plurality of hydrogen pipelines.

[0056] In one embodiment, the electrolytic cell adopts a Proton Exchange Membrane (PEM) and undergoes an electrolysis reaction under the action of direct current to decompose the water in the electrolytic cell into hydrogen and oxygen. The hydrogen produced by the electrolytic cell enters the hydrogen drying and purification system, and the byproduct oxygen produced enters the oxygen treatment system. The hydrogen drying and purification system receives the produced hydrogen from the electrolytic cell, dries and purifies it, and then transports the purified hydrogen to a plurality of hydrogen storage tanks. The oxygen treatment system receives the byproduct oxygen from the electrolytic cell, and after drying, purifying, compressing and storing or liquefying, etc., it can be directly discharged or recycled.

[0057] The hydrogen production monitoring system of the present invention is applied to the above hydrogen production system, such as Figure 1As shown in the figure, the hydrogen production monitoring system includes: a corrosion signal acquisition module, a hydrogen leakage monitoring module, a strain monitoring module, an information processing module, and a host computer.

[0058] The corrosion signal acquisition module is used to measure the thickness information of the electrolyzer, hydrogen pipeline, and oxygen pipeline. The hydrogen leakage monitoring module is used to detect the hydrogen leakage amount in the hydrogen pipeline and the acoustic wave signal generated by the leaked hydrogen. The strain monitoring module is used to detect the optical signal in the optical fiber of the hydrogen pipeline and oxygen pipeline.

[0059] The information processing module is respectively connected to the corrosion signal acquisition module, the hydrogen leakage monitoring module, the strain monitoring module, and the host computer. The information processing module processes the received thickness information, hydrogen leakage amount, acoustic wave signal, and optical signal, and sends the processed thickness information, hydrogen leakage amount, acoustic wave signal, and strain state information of each pipeline to the host computer.

[0060] The corrosion signal acquisition module, the hydrogen leakage monitoring module, and the strain monitoring module are all arranged inside the hydrogen production workshop.

[0061] In the embodiment of the present invention, by introducing the hydrogen production monitoring system into the hydrogen production system, the real-time monitoring ability of the hydrogen production process is comprehensively improved. The corrosion signal acquisition module, the hydrogen leakage monitoring module, and the strain monitoring module comprehensively monitor the electrolyzer, hydrogen pipeline, and oxygen pipeline through high-precision sensors, and timely discover potential risks such as corrosion, leakage, or strain, ensuring the long-term stable operation of the hydrogen production system. The information processing module processes all monitoring data in real time and sends an alarm signal through the host computer to provide accurate equipment status and safety warning information. The real-time monitoring through multi-dimensional perception can not only automatically monitor and manage the hydrogen production system, but also improve the safety of the hydrogen production system.

[0062] In one embodiment, the above hydrogen production system further includes: a power supply system and a deionized water system.

[0063] The power supply system is connected to the electrolyzer through a cable and is used to provide DC power for the electrolyzer. The electrodes (anode and cathode) of the electrolyzer respectively receive the positive and negative currents of the power supply system to drive the electrolysis reaction to occur. The deionized water system is connected to the electrolyzer through a pipeline and is used to continuously supply deionized water to the electrolyzer to ensure that the water quality in the electrolyzer meets the requirements of the electrolysis reaction.

[0064] In one embodiment, since the core component of the hydrogen production system is the electrolyzer, a three-dimensional coordinate system is constructed with the position where the center of the electrolyzer is located as the coordinate origin. The horizontal direction is the X-axis and the Y-axis, and the vertical direction is the Z-axis. Among them, the X-axis and the Y-axis are parallel to the ground of the hydrogen production workshop, and the Z-axis is perpendicular to the ground of the hydrogen production workshop. According to the construction drawings of the hydrogen production workshop, a variety of hydrogen production monitoring sensors are set, and their corresponding coordinate parameters are recorded. Among them, the hydrogen production monitoring sensors include: corrosion monitoring sensors, hydrogen leakage sensors, strain sensors, etc.

[0065] In one embodiment, as Figure 1 shown, the information processing module of the hydrogen production monitoring system includes a first detection module, a second detection module, and a third detection module.

[0066] The first detection module, the second detection module, and the third detection module are set outside the hydrogen production workshop. The first detection module is used to process the thickness information collected by the corrosion signal acquisition module. The second detection module is used to process the hydrogen leakage amount and the acoustic wave signal generated by the leaked hydrogen collected by the hydrogen leakage monitoring module. The third detection module is used to process the optical signal collected by the strain monitoring module.

[0067] In one embodiment, the corrosion signal acquisition module includes a plurality of corrosion monitoring sensors, which are used to measure the thickness information of the electrolyzer, hydrogen pipelines, and oxygen pipelines. The first detection module is respectively connected to a plurality of corrosion monitoring sensors.

[0068] Specifically, the corrosion monitoring sensors adopt flexible ultrasonic sensors, which are respectively arranged inside the electrolyzer, outside the hydrogen pipelines, outside the oxygen pipelines, and other parts of the hydrogen production system vulnerable to corrosion.

[0069] Due to the bendable and surface-adaptive performance of the flexible ultrasonic sensor, it can better fit various complex-shaped surfaces, such as the electrolyzer wall and the pipelines of the hydrogen production system, and can monitor the change of the metal wall thickness, corrosion condition, and structural integrity of the hydrogen production system in real time. The flexible ultrasonic sensor measures the thickness of the electrolyzer and the pipelines of the hydrogen production system or detects internal defects of the hydrogen production system equipment by emitting ultrasonic signals, receiving reflected waves, and then calculating the propagation time, attenuation degree, or phase change.

[0070] During the monitoring process, the first detection module sends electromagnetic ultrasonic signals to the corrosion monitoring sensors at a preset time interval; when the corrosion monitoring sensors receive the electromagnetic ultrasonic signals, they upload the measured thickness information to the first detection module.

[0071] Specifically, the first detection module interacts with multiple flexible ultrasonic sensors wirelessly, sending electromagnetic ultrasonic signals to the multiple flexible ultrasonic sensors at regular time intervals and receiving echo signals. When ultrasonic waves propagate in metal materials, their propagation time and attenuation degree are related to the material thickness and internal corrosion conditions. The flexible ultrasonic sensors will transmit the measured thickness information back to the first detection module, and the first detection module processes the thickness information for data signals, including signal enhancement and abnormal data screening, etc. Among them, the thickness information includes the thickness values of the electrolytic cell, the thickness values of multiple hydrogen pipelines, and the thickness values of multiple oxygen pipelines.

[0072] In one embodiment, as Figure 1 shown, the hydrogen production monitoring system further includes: a first network switch and a second network switch. The information processing module is connected to the host computer through the first network switch and the second network switch in sequence.

[0073] Specifically, the first network switch is respectively connected to the first detection module, the second detection module, and the third detection module. The first network switch is connected to the second network switch through an optical fiber, and the second network switch is connected to the host computer through a network cable.

[0074] The first detection module uploads the processed thickness information to the first network switch in a wired connection manner. The first network switch then transmits the thickness information to the second network switch and the host computer in sequence.

[0075] In one embodiment, if the host computer determines that the thickness information exceeds the alarm threshold, it generates an alarm message and draws a pipeline corrosion change curve based on the real-time thickness information to obtain the trend information of corrosion monitoring.

[0076] Specifically, the host computer performs real-time calculation, storage, and historical data comparison on the thickness information uploaded by the flexible ultrasonic sensors. When it detects that the thickness information reaches the set alarm threshold, it generates an alarm message and sends the alarm message to the security alarm module or the operation and maintenance personnel. The host computer automatically draws a corrosion trend curve based on the time series and thickness values to help the operation and maintenance personnel analyze the corrosion rate of each device in the hydrogen production system, so as to take preventive or maintenance measures in advance.

[0077] In one embodiment, positioning chips are provided inside multiple corrosion monitoring sensors to locate the leakage source position in real time.

[0078] Specifically, each flexible ultrasonic sensor is equipped with a built-in positioning chip, which ensures that when the host computer issues a corrosion alarm, the hydrogen production monitoring system can quickly and real-time locate the specific corrosion position, improving the subsequent maintenance efficiency and ensuring the safe and stable operation of the hydrogen production system.

[0079] In one embodiment, the corrosion monitoring sensors are respectively fixed on the hydrogen pipeline and the oxygen pipeline through a clamp structure.

[0080] In one embodiment, as Figure 2 shown, the clamp structure 200 includes: a first arc-shaped clamp 202, a sensor housing 203, a second arc-shaped clamp 204, a clamp fastening adjustment device 205, and a sensor lead post 206 provided on the first arc-shaped clamp 202 or the second arc-shaped clamp 204;

[0081] The first arc-shaped clamp 202 and the second arc-shaped clamp 204 cooperate to clamp and fix on the hydrogen pipeline and / or the oxygen pipeline; the sensor housing 203 is provided with a convex portion, and the first arc-shaped clamp 202 and the second arc-shaped clamp 204 clamp the convex portion and are fixed to the sensor housing 203; the first arc-shaped clamp 202 includes a first arc-shaped member and a second arc-shaped member, and the first arc-shaped member and the second arc-shaped member are rotatably connected through the clamp fastening adjustment device 205.

[0082] In one embodiment, as Figure 3 shown, the clamp fastening adjustment device 205 includes a rotating shaft 301, a first fastening fastener 302, a second fastening fastener 303, a nut 304, and a fastener 305.

[0083] A circular through hole 306 is provided on the connecting portion 307 of the first fastening fastener 302, and a first through hole (not shown in the figure) is provided on the main body portion of the first fastening fastener 302. A second through hole (not shown in the figure) is provided on the connecting portion 308 of the second fastening fastener 303, and a third through hole 309 is provided on the main body portion of the second fastening fastener 303.

[0084] The rotating shaft 301 is fixed on the first arc-shaped clamp 202, the connecting portion 307 of the first fastening fastener 302 is sleeved on the rotating shaft 301 through the circular through hole 306, and the first fastening fastener 302 and the second fastening fastener 303 are respectively sleeved on the nut 304 through the corresponding first through hole and the third through hole 309 in sequence. The connecting portion 308 of the second fastening fastener 303 is sleeved on the fastener 305 through the second through hole.

[0085] By adjusting the distance between the nut 304 and the first arc-shaped clamp 202, the relative distance between the first fastening fastener 302 and the second fastening fastener 303 can be adjusted to adjust the fastening state of the clamp structure 200.

[0086] In the embodiments of the present invention, the clamp structure adopts a semi-circular clamp method, enabling the sensor to be firmly attached to the surface of the pipeline without damaging the pipeline body, thus avoiding the problems of pipeline structure damage and sealing caused by the traditional welding fixation method. The first semi-circular clamp and the second semi-circular clamp are mutually clamped through the grooves on the sensor housing to form a stable fitting connection structure. This not only ensures the stability of the sensor but also enables the sensor to be quickly disassembled and replaced, improving the convenience of sensor installation. The clamp fastening adjustment device realizes flexible adjustment of the clamping force of the clamp structure through bolts and nuts, ensuring that the clamp structure can adapt to pipelines of different diameters and avoiding damage to the sensor or the pipeline surface due to excessive clamping. This adjustable fixing method is applicable to the monitoring of pipelines of different specifications in the hydrogen production system, enhancing the versatility and adaptability of the clamp structure. The sensor line outlet enables the data line of the sensor to be reasonably routed, avoiding the influence of signal quality caused by bending or external force pulling of the data line and ensuring the stability of sensor signal transmission.

[0087] In one embodiment, the hydrogen leakage monitoring module includes a near-field hydrogen leakage monitoring module and a far-field hydrogen leakage monitoring module.

[0088] The near-field hydrogen leakage monitoring module includes multiple hydrogen leakage monitoring sensors for detecting the hydrogen leakage amount. The second detection module is respectively connected to the multiple hydrogen leakage monitoring sensors.

[0089] Specifically, the near-field hydrogen leakage monitoring module adopts a hydrogen sensor to realize real-time monitoring of easily leaky parts such as hydrogen pipeline joints. The hydrogen sensor is installed at positions where hydrogen leakage is likely to occur in the hydrogen pipeline, valve, hydrogen storage tank interface, pipeline interface, etc. of the hydrogen production system. The installation position of the hydrogen sensor can be synchronously laser-measured according to the construction drawings to ensure that the installation position of each hydrogen sensor is accurate and error-free and is recorded in the pre-established three-dimensional coordinate system. Once a leakage occurs, the hydrogen production monitoring system can quickly determine the specific leakage position, thereby improving the maintenance efficiency and reducing the safety risk caused by hydrogen leakage.

[0090] In one embodiment, as Figure 2 shown, the hydrogen leakage monitoring sensors are respectively fixed on the hydrogen pipeline through the clamp structure 200.

[0091] When the hydrogen leakage monitoring sensor detects that the hydrogen leakage amount reaches the preset threshold, it generates a voltage signal and transmits it to the second detection module.

[0092] Specifically, the hydrogen sensor detects leaked hydrogen by means of hydrogen collection and aggregation, that is, the hydrogen sensor can actively adsorb and concentrate the leaked hydrogen in a local area, improving the detection sensitivity. When the concentration of the leaked hydrogen reaches the set safety critical value (such as 1% or 4% volume concentration, specifically depending on the setting of the hydrogen production monitoring system), the hydrogen sensor will generate a voltage signal and transmit it to the second detection module.

[0093] The second detection module can be connected to multiple hydrogen sensors wirelessly or wiredly. For example, the hydrogen sensor can transmit to the second detection module via Bluetooth. After the second detection module receives the detection data (i.e., voltage signals) of multiple hydrogen sensors, the second detection module performs data signal processing on the voltage signals, including signal filtering, signal amplification, signal conversion, feature extraction, data storage, and data analysis, etc.

[0094] The second detection module uploads the processed voltage information to the host computer through the first network switch and the second network switch in sequence. The host computer determines whether to generate an alarm message by comparing historical data, analyzing the change trend of hydrogen concentration, and combining the three-dimensional coordinate information of the leakage point.

[0095] In one embodiment, the host computer can adopt different alarm mechanisms according to the severity of the hydrogen leakage situation.

[0096] For example, when the hydrogen leakage amount is much lower than the set threshold, it indicates a slight hydrogen leakage. Record the hydrogen leakage amount and perform real-time trend analysis on it; if the hydrogen concentration continues to increase, generate an alarm message. When the hydrogen leakage amount reaches the set threshold, it indicates an obvious hydrogen leakage, automatically generate an alarm message, and send the alarm message to the security alarm module or the operation and maintenance personnel, and at the same time display the three-dimensional coordinates of the specific location of the hydrogen leakage. When the hydrogen leakage amount far exceeds the set threshold, it indicates a serious hydrogen leakage, immediately start emergency ventilation and automatically close the corresponding valves.

[0097] In one embodiment, the far-field hydrogen leakage monitoring module includes multiple microphone arrays, and the microphone arrays are arranged on the hydrogen pipeline and the oxygen pipeline. The microphone array is connected to the second detection module and is used to detect the acoustic wave signal and transmit the acoustic wave signal to the second detection module.

[0098] Specifically, the far-field hydrogen leakage monitoring module uses a microphone array to achieve long-distance monitoring and precise positioning of hydrogen leakage in the hydrogen production workshop. The microphone array is arranged linearly to ensure full coverage monitoring of leakage points in the hydrogen production workshop. The microphone array is set at preset positions in the hydrogen production workshop, including hydrogen pipelines, oxygen pipelines, valves, and hydrogen storage tank interfaces, etc., which are prone to leakage points. When installing the microphone array, the specific position information of each microphone can be determined through synchronous laser measurement technology according to the construction drawings of the hydrogen production workshop and marked in the pre-established three-dimensional coordinate system.

[0099] When hydrogen leakage occurs, a specific high-frequency acoustic wave signal (ultrasonic wave range is usually 20 kHz to 100 kHz) generated by hydrogen leakage is detected through the microphone array. Each microphone in the microphone array can simultaneously collect acoustic wave signals in the hydrogen production workshop, and the background noise (such as equipment operation noise and human voices in the hydrogen production workshop, etc.) is eliminated through the filter of the microphone array. The microphone array uses Fourier transform (FFT) to analyze the spectral characteristics of the collected acoustic waves to extract the high-frequency acoustic wave signal of hydrogen leakage.

[0100] The microphone array is connected to the second detection module in a wired connection manner to avoid signal interference or data loss caused by wireless transmission. The microphone array transmits the collected high-frequency acoustic wave signal to the second detection module. The second detection module performs data signal processing on the high-frequency acoustic wave signal, including noise filtering, signal normalization, feature extraction, signal enhancement, and abnormal data screening, etc. The second detection module uploads the high-frequency acoustic wave signal to the host computer through the first network switch and the second network switch in sequence.

[0101] In one embodiment, when hydrogen leakage is detected, the host computer can calculate the time difference of arrival (TDOA) between the high-frequency acoustic wave signals collected by different microphones to determine the direction and distance of the leakage point sound source; and combined with the pre-established three-dimensional coordinate system, display the position information of the leakage point in the monitoring system to facilitate the rapid response of the operation and maintenance personnel.

[0102] In one embodiment, the hydrogen leakage monitoring module further includes a hydrogen concentration detector for real-time monitoring of the hydrogen concentration in the air in the hydrogen production workshop.

[0103] Specifically, the hydrogen concentration detector is set in the hydrogen production workshop, including: above the hydrogen production system (near the ceiling or ventilation opening of the hydrogen production workshop), pipeline interfaces of the hydrogen production system, valves, hydrogen storage tank interfaces, or areas with weak air fluidity, etc.

[0104] The hydrogen content monitor can monitor the operating status of the hydrogen production system in real time and determine whether there is a trace amount of hydrogen leakage. The hydrogen content monitor is connected to the second detection module through a wireless connection method, and uploads the collected hydrogen concentration to the host computer through the second detection module.

[0105] When the detected hydrogen concentration exceeds the set threshold, the host computer generates an alarm message and automatically activates the ventilation system, exhaust system or emergency power-off measures.

[0106] In one embodiment, when the detected hydrogen concentration is in the low concentration threshold range, that is, the hydrogen concentration is between 0.1% and 1%, the host computer records the real-time hydrogen concentration and analyzes the change trend of the hydrogen concentration to determine whether there is a trace leakage caused by the aging of the hydrogen production equipment. If the hydrogen concentration continues to rise, the host computer generates an alarm message.

[0107] When the detected hydrogen concentration is in the medium concentration threshold range, that is, when the hydrogen concentration is between 1% and 4%, the host computer generates an alarm message and transmits the alarm message to the security alarm module for alarm. The host computer determines the leakage point in combination with the coordinate parameters of the three-dimensional coordinate system.

[0108] When the detected hydrogen concentration reaches the lower explosive limit (LEL) of hydrogen, that is, the hydrogen concentration is greater than or equal to 4%, the host computer triggers an emergency shutdown and automatically closes the hydrogen supply valve; at the same time, the exhaust system is started to reduce the hydrogen concentration in the hydrogen production workshop.

[0109] In one embodiment, the strain monitoring module includes a plurality of fiber optic strain sensors, and the plurality of fiber optic strain sensors are wound and laid along the hydrogen pipeline and oxygen pipeline to detect the optical signal in the optical fiber. The third detection module is respectively connected to the plurality of fiber optic strain sensors.

[0110] Specifically, the strain sensor uses a fiber optic sensor, which can accurately detect the stress and deformation of each pipeline in the hydrogen production system. The main body of the fiber optic sensor is an optical fiber, which can be directly wound and laid on the outer walls of the hydrogen pipeline, oxygen pipeline, hydrogen storage tank and electrolytic cell in the hydrogen production system to form a continuous distributed monitoring network, so as to realize high-precision and all-round strain detection of each pipeline in the hydrogen production system.

[0111] When the hydrogen pipeline and oxygen pipeline undergo strain, the third detection module performs optical signal processing on the spectrum and frequency of the optical signal to obtain the strain state information of each pipeline. Among them, the optical signal includes: optical intensity information, spectral shift and frequency drift and other information. The strain state information includes: axial strain, circumferential strain, shear strain and strain rate, etc.

[0112] Specifically, the light intensity information (Intensity) is used to analyze the signal quality of the fiber optic sensor. The spectral shift (Wavelength Shift) is used to calculate the strain values of the hydrogen gas pipeline and the oxygen gas pipeline. The frequency drift (Brillouin Frequency Shift) is used for distributed strain monitoring.

[0113] The laser signal generator is located at the light source end of the fiber optic sensor, and is used to generate a stable laser signal and transmit the optical signal to the third detection module through the optical fiber.

[0114] When stress changes or structural deformations occur in the hydrogen gas pipeline and the oxygen gas pipeline, the optical signal inside the optical fiber will generate corresponding spectral shifts and frequency drifts. The fiber optic strain sensor sends the detected optical signal to the third detection module. The third detection module performs optical signal filtering on the optical signal to reduce the influence of ambient light interference, light source noise, and system jitter, and performs optical signal processing on the optical signal to determine the strain state information of the hydrogen gas pipeline and the oxygen gas pipeline.

[0115] In one embodiment, the optical signal processing includes spectral demodulation based on Fiber Bragg Grating (FBG) and frequency demodulation based on Brillouin scattering (BOTDA). The spectral demodulation based on Fiber Bragg Grating uses a fiber Bragg grating demodulator to calculate the Bragg wavelength drift according to the spectral shift in the optical signal, and combines the calibration curve of the fiber optic strain sensor to calculate the strain state information. The frequency demodulation based on Brillouin scattering uses a Brillouin scattering demodulation device to calculate the strain state information based on the Brillouin scattering algorithm according to the frequency drift in the optical signal.

[0116] The third detection module uploads the processed strain state information to the first network switch in a wired connection manner. The first network switch then transmits the strain state information to the second network switch and the host computer in sequence, ensuring the stability of data transmission.

[0117] After receiving the strain state information, the host computer can visually display the strain state information, and generate an alarm message when abnormal strain is detected and send it down to the security alarm module for alarm.

[0118] In one embodiment, as Figure 4 shown, the hydrogen production monitoring system further includes an equipment status monitoring module. The equipment status monitoring module includes: a hydrogen-in-oxygen sensor, an oxygen-in-hydrogen sensor, a flow sensor, a voltage sensor, and a liquid level sensor. The equipment status monitoring module is connected to the information processing module.

[0119] Specifically, the information processing module is respectively connected to the hydrogen-in-oxygen sensor, the oxygen-in-hydrogen sensor, the flow sensor, the voltage sensor, and the liquid level sensor.

[0120] Both the hydrogen-in-oxygen sensor and the oxygen-in-hydrogen sensor are installed inside the electrolytic cell. The hydrogen-in-oxygen sensor is used to detect the proportion of hydrogen in oxygen during the hydrogen-oxygen separation process. The oxygen-in-hydrogen sensor is used to detect the proportion of oxygen in hydrogen during the hydrogen-oxygen separation process.

[0121] Specifically, the hydrogen-in-oxygen sensor is installed at the oxygen outlet of the electrolytic cell and / or inside the oxygen pipeline. The hydrogen-in-oxygen sensor measures the hydrogen concentration through gas-sensing electrochemical detection or laser spectroscopy analysis, and transmits the proportion of hydrogen in oxygen to the information processing module. The information processing module uploads the proportion of hydrogen in oxygen to the host computer through the first network switch and the second network switch in sequence.

[0122] During the hydrogen-oxygen separation process, due to damage to the proton exchange membrane (PEM) or gas diffusion effect, a small amount of hydrogen may mix into the oxygen. The hydrogen-in-oxygen sensor can detect the hydrogen content in oxygen in real time. When the detected hydrogen content exceeds the safety threshold (such as more than 2%), the host computer will generate an alarm message for alarm.

[0123] The oxygen-in-hydrogen sensor is installed at the hydrogen outlet of the electrolytic cell or inside the hydrogen pipeline. The oxygen-in-hydrogen sensor measures the oxygen content through electrochemical detection or spectroscopy analysis, and transmits the proportion of oxygen in hydrogen to the information processing module. The information processing module uploads the proportion of oxygen in hydrogen to the host computer through the first network switch and the second network switch in sequence.

[0124] During the hydrogen-oxygen separation process, the oxygen content is usually required to be less than 10 ppm, otherwise it will affect the purity of hydrogen and even increase the risk of combustion and explosion. The oxygen-in-hydrogen sensor can detect the oxygen content in hydrogen in real time. When the detected oxygen content exceeds the safety threshold (such as more than 10 ppm), the host computer can start the hydrogen drying and purification system of the hydrogen production system to improve the quality of hydrogen.

[0125] Flow sensors are installed inside the hydrogen pipeline and the oxygen pipeline, and are used to detect the hydrogen flow rate and oxygen flow rate in the pipeline.

[0126] Specifically, the flow sensor is installed inside the hydrogen pipeline and the oxygen pipeline, near the outlet of the electrolytic cell. The flow sensor is used to monitor the flow rates of hydrogen and oxygen in real time to ensure that the production ratio of the two gases during the electrolysis reaction conforms to the theoretical value (i.e., hydrogen:oxygen = 2:1).

[0127] The flow sensors of the present invention can use a mass flow meter or a thermal flow sensor to measure the flow rates of hydrogen and oxygen, and upload the flow rates of hydrogen and oxygen to the information processing module. The information processing module uploads the flow rates of hydrogen and oxygen to the host computer through the first network switch and the second network switch in sequence. If abnormal flow is detected (such as a decrease in hydrogen flow or an increase in oxygen flow), the host computer can trigger the automatic adjustment of the hydrogen production system. For example, adjust the electrolyzer current, voltage, or open the standby hydrogen pipeline and oxygen pipeline.

[0128] The voltage sensor is arranged at both ends of the electrolyzer for detecting the voltage inside the electrolyzer.

[0129] Specifically, the voltage sensor is directly connected to the two end electrodes (i.e., the anode and the cathode) of the electrolyzer for real-time monitoring of the operating voltage of the electrolyzer to ensure that the electrolysis reaction process is within the optimal operating range (usually 1.8V to 2.2V).

[0130] The voltage sensor of the present invention can use a high-precision digital voltage sensor to continuously monitor the operating voltage of the electrolyzer and upload the operating voltage of the electrolyzer to the information processing module. The information processing module uploads the operating voltage of the electrolyzer to the host computer through the first network switch and the second network switch in sequence. When the voltage is abnormal, the host computer can automatically adjust the output of the power supply system of the hydrogen production system to prevent damage to the electrolyzer.

[0131] The liquid level sensor is arranged inside the electrolyzer for detecting the liquid level in the electrolyzer to balance the liquid level of the electrolyzer.

[0132] Specifically, the liquid level sensor is arranged inside the electrolyzer, usually in the electrolyte areas of the anode chamber and the cathode chamber.

[0133] The liquid level sensor of the present invention can use an ultrasonic liquid level sensor or a capacitive liquid level sensor to real-time monitor the liquid level height of the electrolyte inside the electrolyzer to ensure that during the hydrogen-oxygen separation process, the electrolyte will not have a situation of too low or too high liquid level. The liquid level sensor uploads the liquid level height of the electrolyte to the information processing module. The information processing module uploads the liquid level height of the electrolyte to the host computer through the first network switch and the second network switch in sequence.

[0134] When the liquid level is lower than the first safety value, the host computer can supplement deionized water by controlling the deionized water system of the hydrogen production system. When the liquid level is higher than the second safety value, the host computer can adjust the liquid level height by controlling the drain valve of the hydrogen production system.

[0135] In one embodiment, the data collected by the above-mentioned hydrogen-in-oxygen sensor, oxygen-in-hydrogen sensor, flow sensor, voltage sensor, and liquid level sensor can be transmitted to the information processing module through an industrial bus (Modbus, RS-485) or wireless communication (Wi-Fi, LoRa).

[0136] In one embodiment, the hydrogen production monitoring system further includes an environmental monitoring module, a security alarm module, and a video monitoring module. The information processing module is respectively connected to the environmental monitoring module, the security alarm module, and the video monitoring module.

[0137] The environmental monitoring module includes a temperature sensor and a humidity sensor, which are used to monitor the temperature and humidity in the hydrogen production workshop.

[0138] Specifically, the temperature sensor can be set in the electrolyzer area to monitor whether the heat generated during the electrolysis reaction is within a safe range; it can also be set in the hydrogen storage tank area to ensure that the hydrogen storage environment will not cause the pressure to rise due to high temperature, thereby reducing the explosion risk; it can also be set at the ventilation opening and other areas in the hydrogen production workshop to ensure that the overall environmental temperature in the hydrogen production workshop is appropriate, avoiding the overheating or low temperature of the hydrogen production equipment from affecting the operation stability of the hydrogen production equipment.

[0139] If it is detected that the temperature exceeds the first set threshold (such as greater than 40 °C), indicating abnormal heat dissipation of the electrolyzer and a cooling system failure, the temperature sensor uploads the temperature information to the information processing module. The information processing module uploads the temperature information to the upper computer through the first network switch and the second network switch in sequence. The upper computer generates an alarm message and initiates a linkage cooling measure. If it is detected that the temperature is lower than the second set threshold (such as less than 5 °C), indicating that the pipeline or electrolyte of the hydrogen production system is frozen, the upper computer generates an alarm message and downloads it to the security alarm module for alarm, so as to facilitate maintenance personnel to carry out maintenance.

[0140] The security alarm module includes multiple alarms, which are used to receive the alarm information from the upper computer and give an alarm. The alarms are respectively set at the access control and door magnets of the hydrogen production workshop.

[0141] Specifically, the security alarm module includes an audible and visual alarm, an intelligent access control alarm, a door magnet alarm, etc. The security alarm module is used to receive the alarm information from the upper computer and give an alarm. The audible and visual alarm is set in the hydrogen production workshop, the hydrogen storage tank area, the access control area, etc. When receiving the alarm information from the upper computer, the audible and visual alarm emits a high-decibel alarm and flashes a warning light to remind the on-site personnel to respond quickly. The intelligent access control alarm is set at the access control of the hydrogen production workshop. By integrating biometric identification (such as fingerprint and face recognition, etc.) or RFID electronic access control, if an unauthorized person attempts to enter the hydrogen production workshop, the intelligent access control alarm automatically gives an alarm. The door magnet alarm is set at the hydrogen production workshop door, the hydrogen storage tank room, the control room, etc. When the workshop door is illegally opened or abnormally damaged, the door magnet alarm gives an alarm.

[0142] The video monitoring module includes multiple camera devices for real-time monitoring of the hydrogen production workshop.

[0143] Specifically, the camera devices use high-definition monitoring cameras and are set in the main control area, hydrogen storage tank area, areas around the electrolyzers, and access control areas within the hydrogen production workshop. The camera devices are used to monitor the conditions inside the hydrogen production workshop in real time. The video monitoring module can upload the high-definition video stream to the host computer via Ethernet, 5G, Wi-Fi, or optical fiber. The video monitoring module stores historical monitoring data through cloud storage or a local server for accident backtracking and analysis. If the alarm of the security alarm module goes off, the camera device will automatically focus on the abnormal area, record the video, and upload it to the host computer in real time.

[0144] In one embodiment, as Figure 4 shown, the hydrogen production monitoring system further includes a monitoring and display platform and a system status monitoring module.

[0145] The monitoring and display platform is connected to the host computer and is used to receive and display in real time the data collected by various monitoring modules uploaded by the host computer, and provide equipment status analysis and remote operation and maintenance support to ensure the stable operation of the hydrogen production system. For example, when an abnormality in the hydrogen production system is detected, the monitoring and display platform can display the location information of the leakage point for subsequent maintenance work by the operation and maintenance personnel. The system status monitoring module is used to configure the status parameters of various sensors such as corrosion monitoring sensors, hydrogen leakage monitoring sensors, and strain monitoring sensors.

[0146] In the embodiments of the present invention, through the corrosion signal acquisition module, hydrogen leakage monitoring module, strain monitoring module, environmental monitoring module and security alarm module, full-coverage monitoring of the hydrogen production system is achieved. The corrosion signal acquisition module uses a flexible ultrasonic sensor to continuously monitor the thickness changes of various pipelines, hydrogen storage tanks and electrolyzer walls in the hydrogen production system, and analyzes the thickness information through a host computer, which can early warn of potential corrosion conditions in the hydrogen production system, prevent hydrogen embrittlement or material corrosion caused by the long-term operation of the hydrogen production system, and improve the service life of the hydrogen production equipment. The hydrogen leakage monitoring module combines a near-field hydrogen sensor and a far-field microphone array to achieve full-round hydrogen leakage monitoring in the hydrogen production workshop. The near-field hydrogen sensor can quickly detect changes in hydrogen concentration, while the far-field microphone array can capture tiny hydrogen leakage signals, improving the accuracy and sensitivity of hydrogen leakage monitoring. The strain monitoring module based on fiber optic sensing uses fiber Bragg grating technology to achieve real-time stress and deformation monitoring of hydrogen pipelines and oxygen pipelines, and can early detect pressure changes inside the pipelines or pipeline structure deformation caused by mechanical stress outside the pipelines, so as to take corresponding maintenance measures before the pipelines rupture or leak. In addition, the present invention uses a clamp-type fixing structure to fix a variety of sensors, ensuring that the sensors can closely fit the pipeline surface, and can adapt to pipelines with different diameters, facilitating the replacement and maintenance of the sensors, and improving the operability and adaptability of sensor installation.

[0147] The specific embodiments described above further elaborate on the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrogen production monitoring system, characterized in that: Applied in a hydrogen production system, the hydrogen production system comprises: an electrolyzer, a cooling system, a hydrogen drying and purification system, an oxygen processing system and a hydrogen storage tank; the cooling system is connected to the electrolyzer and the hydrogen drying and purification system respectively through a plurality of coolant pipes; the hydrogen drying and purification system is connected to the electrolyzer and the hydrogen storage tank respectively through a plurality of hydrogen pipelines; the electrolyzer is connected to the oxygen processing system through a plurality of oxygen pipelines, and the hydrogen production monitoring system comprises: a corrosion signal acquisition module, a hydrogen leakage monitoring module, a strain monitoring module, an information processing module and a host computer; The information processing module is respectively connected to the corrosion signal acquisition module, the hydrogen leakage monitoring module, the strain monitoring module and the host computer; The corrosion signal acquisition module is used to measure the thickness information of the electrolytic cell, the hydrogen pipeline and the oxygen pipeline; The hydrogen leakage monitoring module is used to detect the hydrogen leakage amount of the hydrogen pipeline and the sound wave signal generated by the leaked hydrogen; The strain monitoring module is used to detect optical signals in the optical fibers of the hydrogen pipeline and the oxygen pipeline; The information processing module performs signal processing on the received thickness information, hydrogen leakage, acoustic wave signal and optical signal, and sends the processed thickness information, hydrogen leakage, acoustic wave signal and strain state information of each pipeline to the host computer.

2. The system according to claim 1, characterized in that The corrosion signal acquisition module includes a plurality of corrosion monitoring sensors for measuring the thickness information of the electrolytic cell, the hydrogen pipeline and the oxygen pipeline; the information processing module includes a first detection module, and the first detection module is respectively connected to the plurality of corrosion monitoring sensors; During the monitoring process, the first detection module sends an electromagnetic ultrasonic signal to the corrosion monitoring sensor at a preset time interval; when the corrosion monitoring sensor receives the electromagnetic ultrasonic signal, it uploads the measured thickness information to the first detection module.

3. The system according to claim 2, characterized in that A positioning chip is arranged inside each of the plurality of corrosion monitoring sensors to locate the leakage source in real time.

4. The system according to claim 1, characterized in that The hydrogen leakage monitoring module includes a plurality of hydrogen leakage monitoring sensors for detecting the hydrogen leakage amount; The information processing module further includes a second detection module, and the second detection module is connected to the hydrogen leakage monitoring sensor; When the hydrogen leakage monitoring sensor detects that the hydrogen leakage amount reaches a preset threshold, a voltage signal is generated and transmitted to the second detection module.

5. The system according to claim 2, characterized in that The corrosion monitoring sensors are respectively arranged in the electrolytic cell, outside the hydrogen pipeline and outside the oxygen pipeline; the corrosion monitoring sensors are respectively fixed to the hydrogen pipeline and the oxygen pipeline through a clamp structure.

6. The system according to claim 4, characterized in that The hydrogen leakage monitoring sensors are respectively fixed on the hydrogen pipelines through clamp structures.

7. The system according to claim 4, characterized in that The hydrogen leakage monitoring module further includes a plurality of microphone arrays, which are arranged on the hydrogen pipeline and the oxygen pipeline; the microphone arrays are connected to the second detection module; The microphone array is used to detect the sound wave signal and transmit the sound wave signal to the second detection module.

8. The system according to claim 1, characterized in that The strain monitoring module includes an optical fiber strain sensor, which is laid along the hydrogen pipeline and the oxygen pipeline to detect the optical signal in the optical fiber; the information processing module also includes a third detection module, which is connected to the optical fiber strain sensor; When the hydrogen pipeline and the oxygen pipeline are strained, the third detection module performs optical signal processing on the spectrum and frequency of the optical signal to obtain strain state information of each pipeline.

9. The system according to claim 1, characterized in that Also includes: Equipment status monitoring module; The equipment status monitoring module is connected to the information processing module; The equipment status monitoring module includes: a hydrogen-in-oxygen sensor, an oxygen-in-hydrogen sensor, a flow sensor, a voltage sensor and a liquid level sensor; Among them, the hydrogen-in-oxygen sensor and the oxygen-in-hydrogen sensor are both arranged in the electrolyzer, the hydrogen-in-oxygen sensor is used to detect the proportion of hydrogen to oxygen in the process of hydrogen-oxygen separation; the oxygen-in-hydrogen sensor is used to detect the proportion of oxygen to hydrogen in the process of hydrogen-oxygen separation; the flow sensor is arranged inside the hydrogen pipeline and the oxygen pipeline, and is used to detect the hydrogen flow and oxygen flow in the pipeline; the voltage sensor is arranged at both ends of the electrolyzer, and is used to detect the voltage in the electrolyzer; the liquid level sensor is arranged in the electrolyzer, and is used to detect the liquid level in the electrolyzer, so as to balance the liquid level of the electrolyzer.

10. The system according to claim 1, characterized in that Also includes: Environmental monitoring module, security alarm module and video monitoring module; the information processing module is connected to the environmental monitoring module, security alarm module and video monitoring module respectively; The environmental monitoring module includes a temperature sensor and a humidity sensor for monitoring the temperature and humidity in the hydrogen production workshop; the security alarm module includes multiple alarms for receiving the alarm information of the host computer and alarming, and the alarms are respectively arranged at the access control and door magnet of the hydrogen production workshop; the video monitoring module includes multiple cameras for real-time monitoring of the hydrogen production workshop.

11. The system according to claim 1, characterized in that The hydrogen leakage monitoring module also includes a hydrogen content monitor for monitoring the hydrogen concentration in the hydrogen production workshop.

12. The system according to claim 1, characterized in that If the host computer determines that the thickness information exceeds the alarm threshold, an alarm message is generated and a pipeline corrosion change curve is drawn according to the real-time thickness information to obtain corrosion monitoring trend information.

13. The system according to claim 1, characterized in that Also includes: A first network switch and a second network switch; the information processing module is connected to the host computer via the first network switch and the second network switch in sequence.

14. The system according to claim 5 or 6, characterized in that: The clamp structure comprises: a first arc-shaped clamp, a sensor housing, a second arc-shaped clamp, a clamp fastening and adjusting device, and a sensor lead post arranged on the first arc-shaped clamp or the second arc-shaped clamp; The first arc clamp and the second arc clamp cooperate to clamp and fix on the hydrogen pipeline and / or the oxygen pipeline; the sensor housing is provided with a protrusion, and the first arc clamp and the second arc clamp clamp the protrusion and are fixed to the sensor housing; the first arc clamp includes a first arc component and a second arc component, and the first arc component and the second arc component are rotatably connected through the clamp fastening and adjusting device.

15. The system according to claim 14, characterized in that The clamp fastening and adjusting device comprises a rotating shaft, a first fastening fastener, a second fastening fastener, a nut and a fastener; A circular through hole is provided on the connecting portion of the first fastening fastener, and a first through hole is provided on the main body of the first fastening fastener; a second through hole is provided on the connecting portion of the second fastening fastener, and a third through hole is provided on the main body of the second fastening fastener; The rotating shaft is fixed on the first arc-shaped clamp, the connecting portion of the first fastening fastener is sleeved on the rotating shaft through the circular through hole, the first fastening fastener and the second fastening fastener are sleeved on the nut in sequence through the corresponding first through hole and the third through hole respectively; the connecting portion of the second fastening fastener is sleeved on the fastener through the second through hole; By adjusting the distance between the nut and the first arc-shaped clamp, the relative distance between the first fastening fastener and the second fastening fastener is adjusted to adjust the fastening state of the clamp structure.

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