313 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 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 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 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 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.

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 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 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.

The invention discloses a hydrogen brittleness performance evaluation method for a hydrogen transport pipeline, which comprises the following steps: obtaining the average hydrogen concentration in a sample through a high-pressure hydrogen permeation test of a wafer sample, and obtaining the hydrogen concentration and hydrogen diffusion coefficient of the surface of the sample under a specific electrochemical hydrogen charging condition through an electrochemical hydrogen charging test of the wafer sample; a finite element analysis model of a target sample is established to simulate the change relation of the total amount of hydrogen atoms in the target sample along with time under the electrochemical hydrogen charging condition, and the electrochemical hydrogen charging time equivalent to the high-pressure gaseous hydrogen charging is obtained by comparing the high-pressure gaseous hydrogen charging with the electrochemical hydrogen charging. The target sample is charged with hydrogen through an electrochemical hydrogen charging method, and finally the hydrogen embrittlement performance of the target sample is obtained through a hydrogen embrittlement performance test. According to the method, simple finite element simulation and electrochemical hydrogen charging are combined, high-pressure gaseous hydrogen charging which is complex, low in efficiency and high in danger is replaced, and the detection time of the hydrogen embrittlement performance test of the hydrogen charging pipe is shortened.

A method for determining the hydrogen concentration (CH2) in an anode (6) of at least one fuel cell (4) comprises: (A) repeatedly measuring the electric current (i) output by the at least one fuel cell (4) and providing a plurality of current measurement values (i(t)); (B) repeatedly measuring the hydrogen concentration (kH2) in a gas mixture (26, 28) which flows out of a purge valve (20) which is arranged at an outlet (9) of the at least one fuel cell (20), and providing a plurality of hydrogen concentration measurement values (kH2(t)); (C) calculating relative current measurement values (irel(t)) from the measured current measurement values (i(t)) and calculating relative hydrogen concentration measurement values (krel(t)) from the measured hydrogen concentration measurement values (kH2(t)); (D) determining scaled current measurement values (iscal(t)) by multiplying the relative current measurement values (irel(t)) by a current scaling factor (gi) and determining scaled hydrogen concentration measurement values (kscal(t)) by multiplying the relative hydrogen concentration measurement values (krel(t)) by a hydrogen concentration scaling factor (gH2); (E) forming difference values (diff(t)) from the scaled current measurement values (iscal(t)) and the scaled hydrogen concentration measurement values (kscal(t)); (F) integrating or summing the difference values (diff(t)) over time (t); and (G) adding a bias value (GH2) to the integral D(T) or to the sum D(T) of the difference values (diff(t)).

A process for producing amines by reductive amination, the process includes introducing a feed stream, the feed stream comprising an amino alcohol and a reducing agent, and hydrogen in a reaction zone of a reactor, and contacting the feed stream with a catalyst in the reaction zone. A hydrogen flow rate into the reaction zone is adjusted, and a product stream comprising ethyleneamines is extracted. The catalyst includes a carrier component selected from alumina, silica, and combinations thereof; and an active component having a first metal, a second metal, and a third metal. The first metal is selected from cobalt, nickel, and copper, the second metal is selected from rhenium, ruthenium, chromium, zinc, sodium, calcium, magnesium, strontium, lithium, potassium, barium, cesium, lanthanum, tungsten, iron, silver, titanium, manganese, aluminum, rhodium, platinum, palladium, iridium, and combinations thereof, and the third metal is niobium.

A controller, process, and glass manufacturing apparatus can be configured to minimize defects. Embodiments can be adapted to control injection of nitrogen and / or argon and a mixture of nitrogen and hydrogen or nitrogen, hydrogen, and argon during glass float manufacturing to facilitate a pre-selected hydrogen concentration within a tin bath furnace while also minimizing glass surface defects that can be caused from tin condensation and tin bath impurity concentrations. Empirical use data can also be collected and provided to a pre-defined machine learning element of a host device to update a pre-defined control scheme of a controller for adapting the operational condition set points or other target values to account for furnace operation history and performance.

This invention provides a device for measuring hydrogen concentration in soil and a method for determining hydrogen diffusion paths. The measuring device includes: a first gas stone and a second gas stone, buried in the soil; an inlet pipe and an outlet pipe, one end of the inlet pipe connected to the first gas stone and one end of the outlet pipe connected to the second gas stone; a return pump, the other end of the inlet pipe connected to the inlet of the return pump and the other end of the outlet pipe connected to the outlet of the return pump to form a circulating hydrogen circuit; and a measuring component including: a sealed bag and a hydrogen sensor, the sealed bag being connected to the inlet pipe and the hydrogen sensor placed in the sealed bag to measure the hydrogen concentration in the circulating hydrogen circuit. The hydrogen concentration obtained by the above measuring device has high accuracy.

The invention discloses a detection device and a detection method for hydrogen concentration in hydrogen-doped natural gas, and relates to the technical field of hydrogen-doped natural gas analys.The detection device comprises a ten-way valve, two quantitative pipes, a gas carrying pipe and a sample feeding pipe; the ten-way valve is connected with a first quantitative pipe; the ten-way valve is connected with the first analytical column and the second analytical column, and the second analytical column is connected with the thermal conductivity detector; carrier gas is introduced into the carrier gas pipe, and is used for carrying sample gas to the first analysis column and the second analysis column; the device further comprises a six-way valve, the six-way valve is connected with the second quantitative tube, the six-way valve is connected with the first analytical column, the sample introduction tube is connected with the six-way valve, sample gas enters the two quantitative tubes through the sample introduction tube, the six-way valve and the ten-way valve can achieve switching between a first state and a second state, and the quantitative tubes do not need to be replaced when high-concentration hydrogen and low-concentration hydrogen are detected. According to the detection method, the detection device is used for detection, and high-concentration hydrogen and low-concentration hydrogen can be detected.

An apparatus and process for parahydrogen concentration analysis can include forming a synthetic gas that can mimic a hydrogen fluid (e.g. gas or liquid) having 0 mole percent (mol %) parahydrogen. An analyzer may then be calibrated via use of a reference hydrogen gas having a first pre-selected parahydrogen concentration (e.g. a 25 mol % parahydrogen content) and the synthetic gas to identify multiple calibration points for the analyzer for calibration of the analyzer. After the analyzer is calibrated, it can subsequently be utilized to determine a parahydrogen concentration of one or more samples of hydrogen fluid. Some embodiments can be utilized to help ensure that a liquid hydrogen that is produced via liquefaction or other liquid hydrogen production process has a content of at least 95 mol % parahydrogen.

To provide an air-fuel ratio calculation method for a hydrogen engine for calculating an air-fuel ratio that reflects an effect of other gas components excluding oxygen on an O2 concentration sensor.SOLUTION: An air-fuel ratio calculation method for a hydrogen engine includes steps of: measuring each of an oxygen concentration and a hydrogen concentration; correcting the oxygen concentration by using an oxygen concentration correction approximate expression for calculating an oxygen concentration correction ratio corresponding to an unburned hydrogen concentration in exhaust gas; and calculating an air-fuel ratio by using a conversion formula determined on the basis of relation between a change amount of a hydrogen reaction amount along with a change of the air-fuel ratio and a change amount of the oxygen concentration corresponding to the change amount of the hydrogen reaction amount. These steps enable calculation of the air-fuel ratio suitable to the case where fuel is hydrogen.SELECTED DRAWING: Figure 2

The invention relates to the technical field of hydrogen-related testing, and discloses a hydrogen-related high-altitude environmental chamber system and a testing method thereof. An air conditioning system; the fresh air system provides fresh air with different humidity for the interior of the environment chamber body; the exhaust suction system simulates high-altitude low air pressure in the cabin body of the environmental cabin; the safety system is used for monitoring the oxygen concentration of the environmental chamber body and monitoring the hydrogen concentration of the environmental chamber body at multiple points; and the control system is used for connecting and controlling the air conditioning system, the fresh air system and the exhaust suction system to simulate the high-altitude temperature, humidity and low-pressure pressure, and is also used for receiving the oxygen concentration and the hydrogen concentration in real time and giving an alarm when any gas concentration is abnormal. According to the hydrogen-related high-altitude environmental chamber system and the testing method thereof, the temperature, humidity and low air pressure of high altitude can be simulated, the concentration of hydrogen and oxygen can be monitored in real time, multi-point accurate monitoring is performed on hydrogen, and automatic and timely treatment is performed when the concentration of hydrogen and oxygen is abnormal.

The invention relates to a hydrogenation gun positioning device based on automatic hydrogen filling, which relates to the field of hydrogenation gun positioning devices, and comprises a clamping unit, a supporting unit, a grounding unit and a hydrogen concentration detection device, the hydrogen concentration detection device is mounted on the supporting unit; the clamping unit comprises a fastening jacket detachably connected with the hydrogenation gun, a handle fixedly connected with the outer side of the fastening jacket, and a limiting column fixed at the bottom of the fastening jacket; the supporting unit comprises a base with the top face matched with the limiting column and provided with a limiting hole, and a limiting base fixed to the base and provided with a limiting groove in the top face. The grounding unit comprises an installation clamping sleeve detachably connected with the hydrogenation gun, a grounding seat fixed on the base, and a spring probe which is installed on the installation clamping sleeve and elastically abuts against the grounding seat. Grounding of the hydrogenation gun is achieved, so that electrostatic sparks are prevented from being generated in the process that the hydrogenation gun goes in and out of the limiting groove, and the explosion possibility is reduced. Meanwhile, the hydrogen concentration detection device can find hydrogen leakage in time, and explosion is prevented.

Embodiments of the present application are suitable for the hydrogen technology field, and provide a hydrogen early warning method and device, a terminal equipment and a storage medium. The method comprises: acquiring a plurality of historical hydrogen concentrations when a preset monitoring area is detected in a target time period; generating a change curve of the hydrogen concentration according to each historical hydrogen concentration; acquiring an actual hydrogen concentration at a current time; and if it is determined according to the change curve that the actual hydrogen concentration meets a preset early warning condition, generating early warning information. The above method can early warn the monitoring area and reduce the safety risk.

The invention belongs to the technical field of flammable and explosive gas concentration measurement, and particularly relates to a hydrogen concentration measurement method and application thereof. The measurement method comprises the following steps: (1) preparing a plurality of standard samples with different hydrogen concentrations; (2) enabling the standard samples with different hydrogen concentrations to pass through a catalytic sensitive element with a built-in palladium-platinum alloy catalyst respectively, and performing linear regression on the temperature rise value AT by using the hydrogen concentration # imgabs0 # according to a regression equation of # imgabs1 # (3) enabling the sample to be detected to pass through the catalytic sensitive element; and (4) calculating the concentration of hydrogen in the to-be-detected sample according to the regression equation and the temperature rise value of the to-be-detected sample. The measurement method is simple in process and has good stability, and a good prospect is provided for application of hydrogen measurement in a special environment.

The invention discloses a hydrogen production system safety linkage control method based on multistage hydrogen concentration threshold values. The method comprises the steps that S1, hydrogen concentration detection values of all areas of a hydrogen production system are collected in real time; s2, threshold value judgment: comparing a detection value with a plurality of preset concentration threshold values; s3, executing a corresponding linkage control action according to a comparison result: when a detection value reaches or exceeds a first-level threshold value, triggering a first-level response, and executing alarm starting and accident exhaust; when the detection value reaches or exceeds a second-level threshold value, triggering a second-level response, executing the action of the first-level response, and additionally cutting off a hydrogen valve in an associated area; when the detection value reaches or exceeds a third-level threshold value, third-level response is triggered, the action of second-level response is executed, and emergency shutdown of the starting system is increased; according to the method, early warning, hierarchical control and emergency protection of the hydrogen leakage risk are achieved, and unnecessary interference on production is reduced on the premise that safety is guaranteed.

The invention discloses a palladium alloy film hydrogen sensor and a hydrogen detection system and method.The sensor comprises a substrate, the substrate is provided with a first surface and a second surface which are opposite, the first surface is provided with a first hydrogen-sensitive film responding to the hydrogen concentration within a first detection range, and the second surface is provided with a second hydrogen-sensitive film responding to the hydrogen concentration within a second detection range; a second hydrogen-sensitive film which responds to the hydrogen concentration in a second detection range is arranged on the second surface, and the material components and / or microstructures of the first hydrogen-sensitive film and the second hydrogen-sensitive film are different; a temperature measuring element for measuring temperature and a heating element for heating are also arranged on the substrate; wherein the lower limit value of the first detection range is larger than the lower limit value of the second detection range and smaller than or equal to the upper limit value of the second detection range, and the upper limit value of the first detection range is larger than the upper limit value of the second detection range. According to the invention, the problems of complex design, large size, high power consumption, high cost and large error of an existing dual-sensing system are solved through integrated double-sided design of high and low measuring ranges and shared temperature compensation.

The invention relates to a hydrogen leakage detection method and device, a medium, equipment and a vehicle, and the method comprises the steps: collecting a first hydrogen concentration in the vehicle according to a first sampling period, and determining a plurality of first concentration differences according to the collected first hydrogen concentrations, and determining a first quantity of the first concentration positive values and a second quantity of the first concentration negative values in the plurality of first concentration difference values, and determining that hydrogen leakage exists in the vehicle according to the first quantity and the second quantity. In this way, the first hydrogen concentration in the vehicle is collected according to the first sampling period to determine multiple concentration differences, and it is determined that hydrogen leakage exists in the vehicle according to the first number of the first concentration positive values and the second number of the first concentration negative values in the multiple first concentration difference values. The hydrogen leakage of the vehicle can be found in time at the initial stage of slow hydrogen leakage, so that the reliability and accuracy of detecting the hydrogen leakage of the vehicle can be effectively improved.

Tin tetrachloride pentahydrate, zinc nitrate hexahydrate and dimethylimidazole are used as raw materials, methanol is used as a solvent, and the tin-zinc bimetallic oxide, which is named Sn-Zn-O for short, is obtained through stirring, centrifugal drying and calcining; the material is an n-type semiconductor, and the chemical composition of the material is SnO2 and ZnO. The microstructure of Sn-Zn-O is a nano microsphere, and the particle size range of the Sn-Zn-O is 100-250 nm. The invention relates to a preparation method of a hydrogen sensor based on Sn-Zn-O, namely when the Sn-Zn-O is used as the hydrogen sensor, the optimal working temperature is 180 DEG C, the response value is 112 when the hydrogen concentration is 1000 ppm, the response time is 1.29 s, and the recovery time is 147 s. When the hydrogen concentration range is 0.1-2000ppm, the hydrogen sensor has different responses to hydrogen with different concentrations, and the lowest hydrogen concentration is detected to be 0.1 ppm.

The present application relates to a kind of hydrogen leakage safety boundary visualization method and system, belong to new energy technology field.First, the same hydrogen leakage process is carried out using hydrogen leakage experimental device and numerical simulation, data fusion is carried out to the measured hydrogen concentration and simulated hydrogen concentration, and fusion concentration is obtained, then contour curve boundary is randomly taken point until the position of the point is equal to 4%, the position of the point is marked as calibration position, the average gray value is obtained by doing time average processing to the gray value of calibration position, finally, all the pixel points with average gray value in hydrogen leakage gray scale image are marked, and the visual boundary of 4% hydrogen concentration is obtained.The present application uses the strategy of data fusion to improve the accuracy of calibration hydrogen leakage safety boundary profile.

The invention provides a device for measuring the concentration of hydrogen in soil and a method for determining a hydrogen diffusion path, and the device comprises a first gas stone and a second gas stone which are buried in the soil; one end of the air inlet pipe is connected with the first air stone, and one end of the air outlet pipe is connected with the second air stone; the other end of the gas inlet pipe is connected with a gas inlet of the return pump, and the other end of the gas outlet pipe is connected with a gas outlet of the return pump, so that a circulating hydrogen loop is formed; the measuring assembly comprises a sealing bag and a hydrogen sensor, the sealing bag is communicated with the gas inlet pipe, and the hydrogen sensor is arranged in the sealing bag so as to measure the hydrogen concentration in the circulating hydrogen loop; the hydrogen concentration obtained by the measuring device is high in accuracy.

The present invention relates to the technical field of gas permeability testing, and in particular to a method and device for measuring the hydrogen permeation law of non-metal along the thickness direction. The device comprises a first support base, a hydrogen filling tank, a sample, a hydrogen measuring hose, a hydrogen concentration detector, a second support base, a hydrogen filling hole, a pressure relief hole, a detection hole, an exhaust window, and a sealing O-ring. Hydrogen is filled through the hydrogen filling hole on one side of the hydrogen filling tank, and hydrogen permeates along the thickness direction of the sample according to a concentration gradient. After permeating to the detection hole, hydrogen enters the hydrogen concentration detector through the hydrogen measuring hose. The device can be used to measure the hydrogen permeation law of non-metal along the thickness direction, provide experimental support for related hydrogen permeation simulation, and thus provide a basis for the research, development, and selection of non-metallic materials for hydrogen delivery systems.