427 results about "Hydrogen concentration" patented technology

The invention relates to the technical field of pipeline safety, and discloses a hydrogen-doped pipeline hydrogen damage grading evaluation method based on fracture mechanics. Comprising the following steps: acquiring initial pipeline state data by establishing a hydrogen-doped pipeline digital twin model; then introducing a hydrogen concentration dependency term to correct the J integral expression, and performing stress analysis based on the J integral expression; generating a material toughness attenuation curve based on a stress analysis result; hydrogen diffusion and accumulation rate parameters are obtained based on a material toughness attenuation curve; predicting a damage development track in combination with real-time operation data; establishing a grading standard system of dynamic response based on the model for risk assessment; and finally, real-time monitoring and scientific grading of the hydrogen damage of the hydrogen-doped pipeline are realized. According to the invention, comprehensive dynamic evaluation of hydrogen damage of the hydrogen-doped pipeline is realized, and scientific decision support is provided for safe operation of the pipeline.

The invention belongs to the technical field of green hydrogen preparation, discloses an intelligent monitoring method for hydrogen impurities in oxygen in an electrolytic cell system, and solves the problems of response lag, high false alarm rate, incapability of dynamically adjusting working conditions and lack of prediction capability in the prior art. According to the method, the hydrogen concentration in oxygen and key operation parameters of an electrolytic cell are preprocessed, then multi-dimensional correlation analysis is carried out, a dynamic characteristic matrix is constructed, then a hydrogen concentration prediction model is trained based on the constructed dynamic characteristic matrix, and an SVM classifier is adopted to carry out abnormal mode recognition; in the monitoring process, if the predicted hydrogen concentration exceeds a threshold value or an abnormal mode is recognized, grading response is triggered, operation of the electrolytic cells is controlled by adopting a closed-loop control strategy according to real-time detection values of key operation parameters of the electrolytic cells, and finally transverse data comparison of the multi-electrolytic-cell system is achieved through a cloud collaborative optimization technology. And identifying common problems and providing maintenance suggestions.

The invention discloses a hydrogen leakage positioning method, system and device for an electricity-hydrogen coupling station and a medium. The hydrogen leakage positioning method for the electricity-hydrogen coupling station comprises the following steps: analyzing a hydrogen leakage scene of the electricity-hydrogen coupling station, and determining a hydrogen leakage position and working condition; according to the hydrogen leakage position, the overall structure of the electricity-hydrogen coupling station and the real layout of the hydrogen-related area, geometric models of areas where different leakage positions of the electricity-hydrogen coupling station are located are established; performing three-dimensional grid division on the geometric model; hydrogen concentration data of a hydrogen concentration sensor monitoring point are obtained; building and training a leakage positioning model according to the data set; optimizing the sensor layout; and applying the optimized sensor layout and the trained leakage positioning model to an actual electro-hydrogen coupling station scene to realize hydrogen leakage monitoring and leakage positioning. Through the sensor layout optimized by an intelligent algorithm and an advanced machine learning algorithm, the accuracy and efficiency of hydrogen leakage positioning are greatly improved.

The invention discloses a lithium precipitation rapid quantitative detection method and system, a storage medium and a program product, and relates to the field of equipment specially suitable for material research and analys.The method comprises the steps that after ethyl alcohol of a preset volume is dropwise added to the surface of a to-be-detected pole piece, real-time concentration data of hydrogen is collected; determining a time-varying curve of the hydrogen concentration; determining the reaction activity of metal lithium on the surface of the to-be-detected pole piece based on the curve; compensating and correcting the real-time concentration data of the hydrogen according to the reaction activity; and converting the corrected hydrogen concentration data into a lithium quality detection result. The hydrogen generation container is the closed reaction bottle, the needle connected with the hydrogen sensor is inserted into the reaction bottle, the hydrogen concentration can be rapidly detected, the hydrogen concentration in different reaction bottles can be rapidly detected by inserting different reaction bottles, and the detection process is in a closed environment. The method is used for improving the precision of quantitative detection of precipitated lithium, so that the frequency of electrode replacement and calibration is reduced, and the continuity and reliability of detection data in the production process are improved.

To suppress hydrogen concentration in surrounding atmosphere to a determined reference value or less by detecting a change in the hydrogen concentration if liquefied hydrogen leaks.SOLUTION: A liquefied hydrogen pump system includes a liquefied hydrogen pump and a control device, and the liquefied hydrogen pump includes a cylinder, a piston, a rod, a drive part, and a seal part. The seal part includes a first seal member, a second seal member provided with an interval in the direction of separating from the piston an axial direction with respect to the first seal member, a flow passage part, one end of which communicates with a gap between the rod and the cylinder and the other end of which opens to the outside of the cylinder, and an information acquisition part for acquiring information on hydrogen concentration in a fluid flowing to the outside of the cylinder through the flow passage part. The control device stops the operation of the liquefied hydrogen pump in the case of determining that hydrogen concentration in the fluid exceeds a preset reference value on the basis of information on the acquired hydrogen concentration.SELECTED DRAWING: Figure 2

The invention relates to a method for preventing an automatically continued ignition of hydrogen in an exhaust (150) of a fuel cell unit, in particular of a fuel cell vehicle, when the fuel cell unit is started, characterized in that, when at least one start condition of the fuel cell unit is met, reactive hydrogen is removed from a cathode- side and / or exhaust-side gas of the fuel cell unit until, when the fuel cell unit is started, an actual level of a hydrogen concentration in the exhaust (150) is below the lower hydrogen explosion limit, and the method is preferably carried out only when an initial level of the hydrogen concentration of the cathode-side and / or exhaust-side gas in the fuel cell unit is above the lower hydrogen explosion limit for the exhaust (150).

The invention discloses a safety type damaged state rock hydrogen permeation simulation device and method.The simulation device comprises a box body, a simulation mechanism, a hydrogen injection mechanism and an explosion-proof mechanism, and the simulation mechanism comprises a pressure box, a lower cushion block, a thermal shrinkage sleeve, an upper pressing block, an axial pressure assembly and a confining pressure assembly; and the hydrogen injection mechanism is communicated with the gas inlet hole and the gas outlet hole and is used for injecting gas with preset gas pressure and preset hydrogen concentration into the thermal shrinkable sleeve. The device has the beneficial effects that gas with preset pressure and preset hydrogen concentration is continuously injected into the rock sample in the thermal shrinkable sleeve through the hydrogen injection mechanism, the influence of different hydrogen environments on rock mechanical properties can be simulated, meanwhile, the first hydrogen concentration detection piece continuously monitors the hydrogen concentration in the box body, and if the concentration exceeds a preset safety threshold value, the hydrogen concentration is detected. And the fan is immediately started, and hydrogen in the box body is discharged to an outdoor safe area, so that explosion accidents caused by hydrogen leakage can be avoided, and the safety of an experiment process is improved.

The invention discloses a cable fault diagnosis method and system based on ablation gas of a semi-conductive resistance water buffer zone, and the method comprises the steps: extracting gas in a to-be-detected cable buffer layer through a gas collection assembly disposed outside a main insulation part of a cable body; analyzing the gas in the buffer layer of the to-be-detected cable through a cable characteristic gas analysis instrument to obtain the concentrations of hydrogen and propane in the buffer layer of the to-be-detected cable; and comparing the hydrogen concentration with the hydrogen concentration of the cable in a normal operation state, and determining the operation state of the cable to be detected according to the propane content. The problem that the detection time is interfered or missed in the prior art is solved, and whether the semi-conductive resistance water buffer strip is ablated or not can be rapidly and accurately detected and judged.

A method for estimating a quantity of natural hydrogen in a subterranean formation includes degassing drilling fluid obtained from a wellbore to obtain a gas sample including a quantity of hydrogen gas, measuring a concentration of hydrogen in the gas sample, and applying a correction to the measured concentration of hydrogen to estimate the quantity of natural hydrogen in the subterranean formation.

The invention discloses a fuel cell test bench safety monitoring execution method, device, equipment and medium, and relates to the technical field of fuel cell system bench testing.The method comprises the steps that the hydrogen pressure change rate, the hydrogen concentration value and the reference value of the hydrogen concentration change rate are set respectively; collecting a hydrogen pressure signal and a hydrogen concentration signal in the test bench; based on the collected hydrogen pressure signal and hydrogen concentration signal, calculating to obtain a hydrogen pressure change rate, a hydrogen concentration value and a hydrogen concentration change rate in the test bench; and respectively comparing the hydrogen pressure change rate, the hydrogen concentration value and the hydrogen concentration change rate obtained by calculation with set reference values so as to adjust the working state of the test bench. By monitoring and automatically adjusting the hydrogen pressure and concentration, the system can quickly respond to hydrogen leakage and automatically take measures to guarantee the test safety, the safety risk is reduced, and the test efficiency and quality are improved.

The invention discloses a hydrogen refueling station hydrogen leakage flow prediction method, system and device, a medium and a product, and relates to the field of hydrogen energy safety, and the method comprises the steps: obtaining a hydrogen concentration value of a to-be-predicted position of a target hydrogen refueling station, a hydrogen temperature value in a hydrogen storage system, an environment temperature value, and a wind direction and wind speed in the target hydrogen refueling station; according to the parameters, determining the hydrogen leakage flow of the to-be-predicted position of the target hydrogen refueling station by using a hydrogen leakage flow prediction model; wherein the hydrogen leakage flow prediction model is obtained by training each base learner by using a first training data set and training a meta learner by using a second training data set; the first training data set is composed of monitoring point hydrogen concentration calculated by a simulation model, a relational database and time sequence key features of the relational database, and the second training data set is composed of a verification data set and hydrogen leakage flow prediction results generated by all trained base learners. The accuracy of hydrogen leakage flow prediction is improved.

The invention discloses a hydrogen diffusion evaluation method and device for an irregular corrosion defect pipeline, equipment and a medium, and relates to the technical field of oil and gas pipeline safety, a stress field calculation result of the irregular corrosion defect pipeline is obtained, the stress field calculation result is coupled with a hydrogen diffusion field, and a hydrogen diffusion model is established; generating a hydrogen concentration distribution cloud picture based on the hydrogen diffusion model, and analyzing the hydrogen concentration distribution cloud picture to obtain an association relationship between the hydrogen diffusion behavior and hydrostatic stress distribution; based on the incidence relation, hydrogen concentration distribution change curves under irregular defect shapes, regular and irregular defect shapes, corrosion defect lengths and corrosion defect depths of different morphologies are determined respectively; hydrogen diffusion evaluation is carried out on the irregular corrosion defect pipeline based on the hydrogen concentration distribution change curve, the problem that the diffusion behavior and the concentration distribution rule of hydrogen in a real defect area are difficult to accurately reflect is solved, the accuracy and reliability of hydrogen diffusion evaluation of the irregular corrosion defect pipeline are improved, and the safety of pipeline operation is improved.

The invention relates to the technical field of gas permeability testing, in particular to a method and device for measuring the hydrogen permeation rule of nonmetal in the thickness direction, and the device comprises a first supporting seat, a hydrogen filling tank, a sample, a hydrogen measuring hose, a hydrogen concentration detector, a second supporting seat, a hydrogen filling hole, a pressure relief hole, a detection hole, an exhaust window and a sealing O-shaped ring; hydrogen is charged through a hydrogen charging hole in one side of the hydrogen charging tank, the hydrogen permeates in the thickness direction of the sample according to the concentration gradient, and the hydrogen permeates into a detection hole and then enters a hydrogen concentration detector through a hydrogen measuring hose; the device can be used for measuring the hydrogen permeation rule of nonmetal in the thickness direction, and provides experimental support for related hydrogen permeation simulation, so that a basis is provided for research, development and selection of nonmetal materials of a hydrogen conveying system.

The invention relates to the technical field of hydrogen production, in particular to an efficient hydrogen leakage explosion meter and rapid emptying linkage system and an emergency treatment method. Comprising a hydrogen concentration detection module, a data processing module, a rapid emptying device, an emergency processing module and a communication module, the hydrogen concentration detection module is used for collecting hydrogen concentration data in the surrounding environment of the hydrogen production equipment in real time and transmitting the collected data to the data processing module; the data processing module receives the data transmitted by the hydrogen concentration detection module, analyzes and processes the data based on a preset algorithm, and judges whether hydrogen leakage occurs or not and the leakage level; the quick emptying device is in communication connection with the data processing module, and when the data processing module judges that hydrogen leakage occurs, corresponding emptying operation is executed according to the leakage level; according to the invention, the timeliness, accuracy and safety of hydrogen leakage detection and processing can be improved.

The invention discloses an electrolytic bath gas control system and a control method thereof. According to the application, the first purge gas supply pipeline is arranged on the pure water supply pipeline on the anode side of the electrolytic cell, and the hydrogen concentration detector is arranged on the oxygen output pipeline on the anode side of the electrolytic cell and is used for detecting the real-time hydrogen concentration of the gas in the oxygen output pipeline; and the first purge gas supply pipeline is controlled to be opened to inject purge gas into the electrolytic cell until the real-time hydrogen concentration is smaller than a preset hydrogen concentration limit value, the hydrogen concentration of gas in the oxygen output pipeline can be effectively controlled to prolong the operation time of the electrolytic cell, and the low-load operation duration of the electrolytic cell can be prolonged.

The invention discloses a hydrogen concentration sensor which comprises a thermoelectric power generation module, a concentration detection module and a control module, wherein the temperature difference power generation module carries out catalytic combustion when hydrogen is sucked in so as to generate target voltage, and the target voltage is used for supplying power to the concentration detection module and the control module; the concentration detection module is used for detecting the hydrogen concentration in the environment after power supply, generating a voltage signal and sending the voltage signal to the control module; and the control module is used for judging the hydrogen concentration in the environment according to the voltage signal. Therefore, compared with a linear hydrogen concentration sensor, the self-powered hydrogen concentration sensor has the advantages that an additional power supply is not needed, complicated circuits and related circuit loss are avoided, the sensor can be integrated and miniaturized, the sensor can be better applied to a complicated environment, and the self-powered hydrogen concentration sensor can guarantee continuous monitoring.

The invention discloses an intelligent monitoring system for hydrogen embrittlement detection and an implementation method of the intelligent monitoring system, and relates to the field of material structure monitoring, a strain sensor, a temperature sensor and a hydrogen concentration sensor are installed, and a wireless sensor network is constructed to achieve real-time monitoring of the strain state, the temperature change and the hydrogen concentration of a material; in the data processing stage, monitoring data is smoothed, cleaned and normalized, noise is effectively eliminated, the data quality is improved, the characteristics of the strain rate, the temperature change rate and the hydrogen concentration change rate are extracted, and subdata sets are obtained through recursion division; evaluating the relationship between the characteristics and the hydrogen embrittlement risk by calculating a Pearson's correlation coefficient, and calculating an abnormal score by using an isolated tree algorithm so as to divide risk conditions; creating a RESTfu API interface, regularly generating a hydrogen embrittlement risk report, and implementing corresponding monitoring and maintenance measures according to the risk level; through the method, the equipment safety and the management efficiency are improved, accidents and loss caused by hydrogen embrittlement are reduced, and the overall management efficiency is improved.

A method for modifying an insulating film is provided. The method includes a first step of preparing an insulating film containing hydrogen, and a second step of performing microwave treatment on the insulating film to release the hydrogen in the insulating film as water molecules, so that a hydrogen concentration in the insulating film is reduced. Note that the microwave treatment is preferably performed using an oxygen gas and an argon gas at a temperature range of higher than or equal to 200° C. and lower than or equal to 300° C., and the proportion of the flow rate of the oxygen gas to the total of the flow rate of the oxygen gas and the flow rate of the argon gas is preferably greater than 0% and less than or equal to 50%.

The utility model discloses a hydrogen removal system which comprises a first hydrogen removal module, a second hydrogen removal module and a third hydrogen removal module, the reactor coolant system comprises a reactor coolant system main loop and a voltage stabilizer; the first hydrogen removal module is connected with a main loop of the reactor coolant system, and the first hydrogen removal module is used for carrying out circulating degassing on a coolant in the main loop of the reactor coolant system before shutdown, so that the hydrogen concentration of the coolant is within a preset range; the second hydrogen removal module is connected with the voltage stabilizer; the second hydrogen removal module is used for reducing the hydrogen concentration of a gaseous space in the voltage stabilizer after shutdown; and the third hydrogen removal module is connected with the reactor coolant system main loop and is used for carrying out chemical hydrogen removal on the reactor coolant system main loop after the reactor is shut down and the temperature of the coolant is lower than the preset temperature until the hydrogen concentration is reduced to be lower than the preset concentration. Therefore, long hydrogen removal time of the reactor coolant system in the maintenance process is avoided, and the hydrogen removal efficiency is improved.

The invention discloses a metal material hydrogen compatibility simulation test method based on hydrogen content. The method comprises the following steps: S1, sample preparation; s2, charging hydrogen in a high-pressure hydrogen environment; s3, diffusible hydrogen is measured; s4, preparing an electrochemical hydrogen charging solution; s5, carrying out hydrogen charging by using an electrochemical hydrogen charging solution; s6, storing the sample; s7, drawing a hydrogen concentration change curve; s8, electrogalvanizing process parameters are set; s9, performing hydrogen charging in a simulated high-pressure hydrogen environment; s10, the sample is galvanized; s11, carrying out a slow tensile test and a fracture toughness test on the sample; and S12, evaluating the high-pressure hydrogen embrittlement of the sample based on the results of the slow tensile test and the fracture toughness test. According to the method, the hydrogen embrittlement performance of the material under different hydrogen pressure environments can be obtained, and the influence of the influence factors on the high-pressure hydrogen embrittlement performance of the steel can be analyzed in combination with the process, alloy components and stress states of the steel.

The invention discloses a high-purity hydrogen production safety monitoring method based on an intelligent sensing technology, and the method comprises the following steps: obtaining a plurality of hydrogen concentration data and environment data based on a detector disposed in a high-purity hydrogen production area; obtaining interference gas components and concentration in the high-purity hydrogen production area, and determining a plurality of interference factors based on interference degrees of the interference gas components and concentration on the plurality of hydrogen sensors; determining a plurality of environmental compensation factors based on the influence degree of the environmental data on the plurality of hydrogen sensors; fusing the plurality of hydrogen concentration data based on the plurality of interference factors and the plurality of environment compensation factors to obtain a target hydrogen concentration value; if the target hydrogen concentration value exceeds the early warning threshold value, an early warning signal and an early warning instruction are sent to a control terminal. According to the invention, the error of a single sensor is reduced, the influence of environmental data on the hydrogen concentration can be considered and corrected, and the accuracy of hydrogen concentration detection is improved.

The invention provides an animal multi-mode experiment control system for controlling the concentration of hydrogen and oxygen, an integrated sensor module, a gas concentration control system and a user interface. The sensor module monitors the temperature, the humidity, the hydrogen concentration and the oxygen concentration in the experiment module in real time and feeds back the data to the gas concentration control system, the actual flow value and the set flow value are compared through the central control PCB according to flow information provided by the float flowmeter, the opening degree of the valve is automatically adjusted, and the gas concentration is controlled. And the concentration of hydrogen and oxygen in the experiment module is maintained in a preset range. The high-precision sensor module can accurately capture key parameter changes. A PID algorithm is adopted for gas concentration control, a float flowmeter and an automatic regulating valve are combined, the concentration control precision within + / -1% is achieved, and the high-precision experiment requirement is met. According to the invention, a stable and accurate hydrogen and oxygen concentration management scheme is provided for animal experiments, and the controllability and data reliability of the experiments are improved.

The invention relates to a hydrogen refueling station inspection robot hydrogen leakage degree quantification method, belongs to the technical field of gas leakage detection, and solves the problems that existing hydrogen leakage quantification is poor in real-time performance and inaccurate in quantification result. The method comprises the steps that when the inspection robot detects that the hydrogen volume fraction exceeds a preset threshold value, a current position serves as an initial point position, and moving and sampling are carried out multiple times in the determined hydrogen leakage source direction; based on the sampling data of each point location, constructing a corresponding local hydrogen concentration field and determining the position of a hydrogen leakage source; based on the local hydrogen concentration field closest to the hydrogen leakage source, hydrogen leakage degree quantification parameters are obtained; obtaining a hydrogen leakage degree quantized value based on the hydrogen leakage degree quantized parameter; and obtaining a hydrogen leakage risk level based on the hydrogen leakage degree quantized value and a preset leakage risk level threshold interval.

The invention provides a control method and device of an alkaline electrolyzed water system, an MPC controller optimizes hydrogen flow and auxiliary power supply power in real time through a prediction model in each control period to obtain an optimal control sequence of the current control period, and based on a first control parameter in the optimal control sequence, a second control parameter in the current control period is obtained; and cooperatively regulating the hydrogen-oxygen side pressure difference of the alkaline electrolyzed water system to a target value, and meanwhile, controlling the hydrogen concentration in oxygen of the alkaline electrolyzed water system within a safety threshold value. According to the scheme, the input is controlled based on rolling optimization of the multivariable dynamic prediction model, the dual targets of pressure difference stabilization and inhibition of the hydrogen content in oxygen are achieved, the technical problem that dynamic balance and the HTO risk are difficult to consider in traditional single parameter adjustment is solved, and the hydrogen production efficiency and safety are remarkably improved in the scene of wind and light fluctuation.

The invention discloses a hydrogen trap characteristic parameter determination method based on a genetic algorithm, and relates to the technical field of hydrogen trap characteristic calculation. Placing the sample in a hydrogen filling device for hydrogen filling treatment, wherein the hydrogen concentration in the sample is saturated; transferring the sample into a heating thermal desorption device for hydrogen desorption treatment, collecting overflowed hydrogen through a mass spectrometer to obtain an actually measured TDS curve, and analyzing the category number of hydrogen traps in the material; according to the McNabb and Foster theories, in combination with an Oriani hypothesis, a calculated TDS curve is obtained; establishing an error function between the actually measured TDS curve and the calculated TDS curve; and according to the error function, a genetic algorithm is adopted to invert and solve the concentration and binding energy of various hydrogen traps. The method can accurately predict the concentration of various hydrogen traps in the material and the characteristic parameters of binding energy, and provides technical support for hydrogen embrittlement prevention design, safety evaluation and the like of steel for hydrogen energy storage and transportation equipment.

The invention discloses a hydrogen pipe permeation testing system and method. The hydrogen pipe permeation testing system comprises a hydrogen permeation collecting device, a testing pipeline, a temperature adjusting module, a hydrogen supply module, an air exhaust module, a humidifying module and a circulating power element. The hydrogen permeation collecting device is used for installing a detected hydrogen pipe so as to collect hydrogen permeated from the detected hydrogen pipe, the hydrogen permeation collecting device is provided with a hydrogen concentration sensor, and the hydrogen permeation characteristic of the detected hydrogen pipe can be calculated according to the hydrogen concentration detected by the hydrogen concentration sensor. The test pipeline is communicated with the hydrogen pipe to be tested to form a test loop, and the actual application working condition of the hydrogen pipe to be tested can be simulated in the test loop through the hydrogen supply module, the air exhaust module, the humidifying module, the temperature adjusting module and the circulating power element. The hydrogen permeation amount of the tested hydrogen pipe is tested under the hydrogen condition with the same pressure, temperature and humidity as the actual application working condition of the fuel cell system, so that the hydrogen permeation characteristics of rubber pipes made of different materials are judged.

The invention relates to a method for operating a fuel cell system (1) comprising an anode subsystem (3) for supplying at least one stack (2) with hydrogen to generate a stack current, wherein the hydrogen is supplied in an anode gas which becomes enriched with nitrogen during operation, and wherein a nitrogen concentration in the anode gas is controlled by temporarily discharging anode gas from the anode subsystem (3) via a controllable purge valve (14) during a purge process and replacing it by supplying fresh hydrogen, characterized by the following steps: (a) Determination of a hydrogen concentration in the anode gas, (b) Inference from the hydrogen concentration and the stack current to an actual anode stoichiometry, (c) comparing the actual anode stoichiometry with a target anode stoichiometry, (d) Indirect adjustment of the hydrogen concentration by varying the duration and / or frequency of the purge process if the actual anode stoichiometry deviates from the target anode stoichiometry. The invention further relates to a control device for executing method steps.

The invention relates to the technical field of gas permeability testing, in particular to a method and a device for testing hydrogen permeability of a high-pressure flexible composite pipe under tensile load. The device comprises a hydrogen concentration detection sensor, a nut, a thrust bearing, a pull rod, a stress monitoring sensor, a blind flange, a flange, an organic glass tube and a clamping plate, wherein the blind flange can seal gas in the tube; the clamping plate is used for axially positioning the composite pipe; axial prestress can be applied to the composite pipe by screwing the nut, and the stress monitoring sensor can record a stress value; the hydrogen concentration detection sensor can detect the gas concentration in the organic glass tube. Compared with the existing closest technology, the method has the advantages that the influence of the tensile load on the hydrogen permeability of the full-size high-pressure flexible composite pipe is considered, the test result is closer to the actual working condition, and technical support can be provided for selection and research and development of the hydrogen energy conveying high-pressure flexible composite pipe material.

The invention discloses a compact tensile sample dynamic hydrogen charging test device and a test method. The compact tensile sample dynamic hydrogen charging test device comprises an electrochemical hydrogen charging device, a liquid carrying table, a compact tensile sample and a clamp, a CT sample penetrates through the liquid carrying table through the clamp and is fixed, and the electrochemical hydrogen charging device is connected with the liquid carrying table; and the whole CT sample and the clamp head are positioned in the columnar container and are immersed in the electrolyte of the columnar container. The problems of potential safety hazards, limited hydrogen filling content and hydrogen escape during hydrogen filling of the CT sample are solved; electrochemical hydrogen charging can be carried out while a fracture toughness test or a fatigue test is carried out, so that hydrogen overflow caused from hydrogen pre-charging to an experiment is effectively avoided, and potential safety hazards of experiment problems caused by a conventional hydrogen pre-charging experiment are also avoided; any hydrogen charging current density can be taken, after the surface area of a sample is measured, the hydrogen flux in the experiment process can be strictly controlled by adjusting the current of the direct-current power supply, the gradient hydrogen concentration is obtained by controlling the current and the hydrogen charging time, research is facilitated, and experiment parameters are accurate.

The invention discloses a hydrogen concentration measurement method based on a multi-mode sensor, and relates to the technical field of gas detection and industrial process safety monitoring. Hydrogen sensors based on different physical principles are introduced in the same measurement link, and environmental variables such as temperature, humidity, pressure and the like and sensor output are collected together; a multi-dimensional feature is formed after normalization and time alignment, and then fusion is performed by using a weight adaptive to the change of an environment, so that instantaneous errors generated by a single sensor due to temperature drift, wet drift or pressure fluctuation are shared or suppressed, and the stability and repeatability of a fusion result are improved; furthermore, a cross sensitivity compensation module arranged before fusion identifies response differences between hydrogen and interference components such as carbon monoxide and methane by using a machine learning model obtained by training under a multi-gas mixing working condition, and the probability of false signals and false alarms caused by coexisting gas is reduced on the premise that a special detection channel is not added.