20 results about "Hydrogen measurement" patented technology

The utility model provides a metering and calibrating device for a hydrogen adding machine for an automobile, which comprises a detection box body provided with a fixed pipeline, and a detection module is arranged on the fixed pipeline; a first connecting position and a second connecting position which are connected with one end of the fixed pipeline are respectively arranged on the detection box body; the first connecting position is used for inserting the hydrogen adding machine; and the connecting air gun is connected with the other end of the fixed pipeline and is connected with a hydrogen filling port of the automobile. According to the metering and calibrating equipment of the hydrogen adding machine for the automobile, the second connecting position is connected with the shielding gas supply unit to clean air in a pipeline before the hydrogen adding machine is inserted, so that potential safety hazards caused by mixing of hydrogen and air are avoided, and the safety in the metering and calibrating process is improved; meanwhile, the clean air ensures the purity of gas components in the pipeline and prevents the air from interfering with hydrogen metering, so that the accuracy of metrological verification of the hydrogen adding machine is remarkably improved; the connecting air gun can be directly connected with a hydrogen filling port of an automobile without repeated disassembly.

The application discloses a preparation method and application of extra-high voltage electronic aluminum foil, and comprises the following steps: (1) putting pure aluminum ingot into a smelting furnace for smelting, adding aluminum-chromium intermediate alloy for continuously heating and stirring until the aluminum-chromium intermediate alloy is completely melted; refining and stirring; (2) sequentially carrying out degassing, hydrogen measurement, filtering, slag measurement and standing on the refined alloy liquid, and then casting to obtain chromium-containing aluminum ingot; (3) sequentially carrying out surface milling treatment, homogenization treatment, hot rolling treatment, cold rolling treatment and intermediate annealing treatment on the chromium-containing aluminum ingot; (4) sequentially carrying out foil rolling and finished product annealing treatment on the chromium-containing aluminum foil intermediate; (5) sequentially carrying out electrolytic polishing treatment and direct current etching treatment on the chromium-containing aluminum foil product. The prepared extra-high voltage electronic aluminum foil can be used as an anode material of an extra-high voltage aluminum electrolytic capacitor. The application can solve the technical problems of poor quality stability and small corrosion hole density of the aluminum foil produced by the existing aluminum foil production process.

The present application belongs to the technical field of hydrogen detection material produced by electrolysis of water, and relates to an in-situ hydrogen detection electro-reduction-electro-oxidation composite electrode and a preparation method and application thereof. The in-situ hydrogen detection electro-reduction-electro-oxidation composite electrode comprises a Pt / FTO electro-reduction electrode, an insulating glass separator and a Pt / FTO electro-oxidation electrode, and the coating on the surface of the Pt / FTO electro-reduction electrode and the Pt / FTO electro-oxidation electrode comprises an FTO layer in which platinum particles are dispersedly embedded; the proportion of Pt in the FTO layer is 0.5-1.5%. The application further discloses a preparation method and application of the in-situ hydrogen detection electro-reduction-electro-oxidation composite electrode. The in-situ hydrogen detection electro-reduction-electro-oxidation composite electrode can in-situ detect trace hydrogen in the process of electrocatalytic decomposition of water at an extremely low potential, and has the advantages of high detection sensitivity and low energy consumption.

The invention relates to the technical field of hydrogen measurement sensing, in particular to a hydrogen extraction system of an instrument for measuring the hydrogen content in aluminum alloy, which is based on the test characteristics of the hydrogen content in the aluminum alloy and combines the test defects in practical application. Infrared light is focused on a sample in a high-temperature-resistant quartz sample tube for multiple times through a mirror surface gold-plated curved surface on the inner wall of the furnace body to fully melt the sample, external temperature control software is matched to accurately control the temperature of a gold-plated infrared focusing heating tube, and negative pressure gas circuit design and circulating water cooling control are combined, so that accurate, rapid and stable heating and test data acquisition are realized; the requirement for large sample detection is met, multiple effects of energy conservation and environmental protection are integrated, and the comprehensive effects of high efficiency, accuracy, reliability, safety and the like are achieved for detection of the hydrogen content in the aluminum alloy.

The invention relates to a hydrogen leakage detection method and device, and relates to the field of hydrogen detection, and the method comprises the following steps: step 100, collecting thermal conductivity parameters; 101, determining a sensitivity coefficient in response to the thermal conductivity parameter; step 102, calculating a product of the thermal conductivity parameter and the sensitivity coefficient, and defining the product as an actual parameter; step 103, determining the hydrogen concentration based on the actual parameters; and step 104, generating and displaying a hydrogen concentration prompt in response to the hydrogen concentration. The hydrogen detection device has the effects of improving the accuracy of hydrogen measurement and detecting the leakage condition of hydrogen in time.

An embodiment relates to a hydrogen gas sensor for forming an electrically separated nanogap in a Pd thin film through an ultrasonic treatment and hydrogen cycling, wherein the formed nanogap opens and closes according to a hydrogen concentration, enabling quantitative and sensitive detection through a change in capacitance, and has advantages in that a uniform gap structure can be implemented with a simple process without mechanical straining, providing excellent repeatability and manufacturing reproducibility, and that the sensitivity and detection limit of the sensor can be precisely controlled only with the ultrasonic treatment conditions.

The application discloses a kind of heat balance secondary hydrogen concentration measurement method and device based on specific enthalpy difference analysis, to solve the technical problems that existing measurement method is difficult to meet the whole process of low-temperature hydrogen energy industry chain Each link secondary hydrogen measurement measurement demand.The measurement method of the application is: 1) connect heating channel on the gas path to be measured;2) measure the mass flow, temperature and pressure of sample hydrogen at the inlet of heating channel;3) heat the sample hydrogen in the heating channel with known heat power;4) measure the temperature and pressure of sample hydrogen at the outlet of heating channel;5) based on the measurement results of 2) and 4), the concentration of secondary hydrogen in sample hydrogen is obtained by specific enthalpy difference analysis and heat balance calculation.The principle of the method is simple and reliable, easy to implement and operate, low in cost, high in feasibility, fast in response and wide in application, and can meet the requirements of continuous and accurate measurement of secondary hydrogen concentration under most working conditions of low-temperature hydrogen energy industry chain.

The invention provides an in-situ measurement device for hydrogen permeability of a composite material under uniaxial tension. The in-situ measurement device comprises a test stand; the fixed tensile fixture is mounted on the test stand, the fixed tensile fixture comprises a first clamping assembly and a second clamping assembly, and the first clamping assembly and the second clamping assembly are used for clamping the two ends of the to-be-tested sample in the axial direction respectively; the measuring module is mounted on the test stand, the measuring module comprises a first contact assembly and a second contact assembly, the first contact assembly and the second contact assembly are used for being in contact with the two side surfaces of the to-be-tested sample in the horizontal direction respectively, each of the first contact assembly and the second contact assembly comprises a permeation chamber facing the to-be-tested sample, and the permeation chambers are suitable for being filled with hydrogen; the measurement module is configured in a way that after the to-be-tested sample is stretched at a preset temperature, the first contact assembly and the second contact assembly respectively clamp the to-be-tested sample from two sides for sealing, so that a penetration test is carried out. According to the invention, on the basis of in-situ measurement, the accuracy of hydrogen permeability testing can be improved.

The present disclosure relates to systems and methods for controlling hydrogen stack power and load. The systems include at least one hydrogen stack, a pressure sensor, and a controller, wherein the controller is operable to increase or decrease the power to the at least one hydrogen stack in response to a change in pressure. The methods include generating hydrogen using at least one hydrogen stack, measuring the pressure of the generated hydrogen, and increasing or decreasing the power supplied to the at least one hydrogen stack in response to an increase or decrease in the pressure.

The application discloses a sensor and a combustion system comprising the same. The sensor according to the embodiment of the application comprises a reference oxygen chamber, a first chamber, a second chamber, a third chamber, a nitrogen oxide measuring unit and a carbon hydrogen measuring unit. The first chamber is connected with the outside through a first diffusion channel. The second chamber is connected with the first chamber through a second diffusion channel. The third chamber is connected with the second chamber through a third diffusion channel. The nitrogen oxide measuring unit is used for measuring the concentration of nitrogen oxide. The carbon hydrogen measuring unit comprises a carbon hydrogen electrode, a reference electrode arranged in the reference oxygen chamber and a carbon hydrogen measuring unit. The carbon hydrogen measuring unit obtains the carbon hydrogen concentration according to the voltage difference between the carbon hydrogen electrode and the reference electrode. The sensor and the combustion system comprising the same according to the embodiment of the application are additionally designed with the carbon hydrogen electrode to measure the carbon hydrogen concentration, and integrate the nitrogen oxide measurement and the carbon hydrogen measurement.

The invention relates to the technical field of hydrogen measurement, and discloses an experiment method and device for optimizing an optical fiber hydrogen measurement sensor, and the method comprises the following steps: connecting an optical fiber hydrogen sensor and an MOS hydrogen sensor in a closed gas sensitive test cavity, and setting control programs of a gas inlet valve and a gas outlet valve; controlling the valve to introduce hydrogen into the gas-sensitive test cavity to form a preset dynamic concentration curve; the intracavity hydrogen concentration CFOS (t) measured by the optical fiber hydrogen sensor and the intracavity hydrogen concentration CMOS (t) measured by the MOS hydrogen sensor are obtained; based on the combination of extended Kalman filtering and a recursive least square method, the collected signals are processed, and the dynamic response and sensitivity factors of the optical fiber hydrogen sensor are adaptively corrected; according to the experimental method and device for optimizing the optical fiber hydrogen measuring sensor, it can be ensured that the sensor can still keep correct measurement in the constantly changing environment.

The invention relates to the fields of materials science and measurement technology and concerns calibration objects, such as those that can be used in analytical spectroscopy. The object of the present invention is therefore to produce electrically conductive calibration blocks, in particular for the calibration of hydrogen measuring instruments. The calibration blocks can be provided in large quantities, simply and cost-effectively. The problem is solved by calibration bodies, in particular for the calibration of hydrogen measuring instruments, consisting at least of an electrically conductive, porous sintered body with a substantially homogeneous distribution of pores and / or defects, such as dislocations, stacking faults and / or twins, in the sintered body, in which an adjustable hydrogen concentration is present depending on the number and size of the pores and / or defects in the sintered body, wherein the hydrogen is physically and / or chemically bound in and / or on the surface of the pores and / or defects, and wherein the set hydrogen concentration in the calibration body decreases in a specified amount over time.

Kn controlled gas nitriding process is a thermo-chemical surface treatment applied to many steel materials in industry (automotive, machinery, mold industry, aerospace, etc). In the gas nitration process, Kn constant is used for repetitive processes. The gas flow rate to be fed to the furnace is adjusted according to the Kn constant. In order to calculate the Kn constant, it is necessary to measure the 0 % hydrogen (H2) value in the gas atmosphere. The present invention relates to an active hydrogen measurement system with pressure difference for measuring the variability of hydrogen (H2) gas % in the continuously cycling gas atmosphere of gas nitration furnaces where the process is applied and for process control.

The invention provides a method for measuring hydrogen in oxygen in an electrolytic bath parallel hydrogen production system, and relates to the field of measurement of hydrogen in oxygen in the electrolytic bath parallel hydrogen production system. The method comprises the following steps: step 1) carrying out binary coding on each electrolytic cell, wherein the binary code corresponding to each electrolytic cell is unique; 2) dividing all the electrolytic cells into two groups according to 0 and 1 at each binary site, and selecting a binary site as a measuring point; (3) detecting the content of hydrogen in oxygen in the mixed gas in the two groups of electrolytic baths divided by the measuring points by adopting two analyzers respectively; step 4) conforming to any one of the following conditions: condition 1, the difference value of the two analyzers exceeds a trigger threshold value; the second condition is that the data of any analyzer exceeds a theoretical value; the third condition is that the detection time of the measuring point exceeds a time set value; 5, after all the binary measuring points are rotated, the abnormal electrolytic bath is judged. On the premise that the data accuracy is not reduced, the number of needed analysis instruments is remarkably reduced, and the monitoring precision of the system is improved.

This invention provides an exhaust gas analysis and testing system, operating method, and analysis and testing method for the combustion chamber of a hydrogen-powered aero-engine, relating to the field of engine emission testing technology. The system includes: a sampling and pretreatment pipeline assembly, an oxygen and conventional pollutant measurement assembly, a dual-path hydrogen measurement assembly, a control and safety assembly, and a data acquisition and processing assembly. The sampling and pretreatment pipeline assembly includes a sampling probe element and a pretreatment pipeline. The sampling probe element is connected to the pretreatment pipeline and is used to sample the exhaust gas from the combustion chamber. After sampling and pretreatment of the exhaust gas through the sampling and pretreatment pipeline assembly, the exhaust gas is transmitted to the oxygen and conventional pollutant measurement assembly and the dual-path hydrogen measurement assembly, respectively. After data measurement of the pretreated exhaust gas, the data acquisition and processing assembly records the signals of each analysis channel and stores and transmits the analysis data. The analysis and testing system provides full-process support from sample gas measurement to EI calculation.

The invention relates to the technical field of tubular reactors, in particular to a tubular reactor cleaning system and method.The tubular reactor cleaning system comprises a water supply assembly, a cleaning pipe, a first valve, a second valve, a resistivity measuring part, a gas pressure monitoring part, a gas supply assembly and a hydrogen measuring part; the output end of the water supply assembly is connected with an outlet of the cleaning pipe, the outlet of the cleaning pipe is connected with one end of the first valve, the other end of the first valve is connected with an outlet of the reaction pipe, the second valve is connected with an inlet of the reaction pipe, the resistivity measuring component is connected with the second valve, and the gas supply assembly is connected with the inlet of the reaction pipe. The hydrogen measuring part is connected with the second valve, and the gas pressure monitoring part is connected with the reaction tube. According to the tubular reactor cleaning system, the tubular reactor can be conveniently cleaned, the harm caused by manual contact with chemical reagents is reduced, and the cleaning quality is improved.

The invention provides a tail gas analyzing and testing system for a hydrogen-burning aero-engine combustion chamber, an operation method and an analyzing and testing method, and relates to the technical field of engine emission testing. Comprising a sampling and preprocessing pipeline assembly, an oxygen and conventional pollutant measuring assembly, a dual-channel hydrogen measuring assembly, a control and safety assembly and a data acquisition and processing assembly, the sampling and pretreatment pipeline assembly comprises a sampling probe element and a pretreatment pipeline; the sampling probe element is connected with the pretreatment pipeline and is used for sampling tail gas of the combustion chamber; after being sampled and pretreated through the sampling and pretreatment pipeline assembly, the tail gas is conveyed to the oxygen and conventional pollutant measuring assembly and the double-channel hydrogen measuring assembly; after data measurement is carried out on the pretreated tail gas, signals of all the analysis channels are recorded through the data collecting and processing assembly, and analysis data are stored and transmitted. The whole process support from sample gas measurement to EI calculation is realized through the analysis test system.

The invention discloses a material fracture numerical analysis method based on a cohesion model in a hydrogen environment. The method comprises the following steps: carrying out an unnotched sample tensile experiment in air; carrying out a hydrogen permeation experiment; carrying out an air environment fracture experiment; a series of high-pressure hydrogen charging and hydrogen measuring experiments are carried out; simulating stress distribution and hydrogen distribution of the notch sample; according to a simulation result, selecting a corresponding hydrogen environment, and carrying out a fracture experiment in the environment; and hydrogen damage simulation based on the cohesion model is carried out according to parameters obtained by the experiment. According to the method, the tension displacement relationship of a cohesion region is taken as a core, and the metal tensile fracture simulation process is researched by depending on finite element sequential coupling simulation and combining related performance in a hydrogen environment. According to the method, the required experimental quantity is small, and a load-displacement curve in the tensile process in the hydrogen environment can be well reproduced.

The invention relates to the technical field of hydrogen measuring devices, in particular to a low-power-consumption closed space hydrogen measuring device. The device comprises an upper protective shell, wherein a lower protective shell and the upper protective shell form a protective shell; the sampling tube is arranged at the upper part of the inner side of the upper protective shell; two ventilation interfaces are formed in the top of the hydrogen sensitive assembly, and the hydrogen sensitive assembly is mounted at the bottom of the sampling tube through the ventilation interfaces; the aviation plug is installed on the outer side of the top of the upper protective shell. The data processing module is installed on the inner side of the bottom of the lower protective shell. The connecting circuit is used for connecting the data processing module with the aviation plug and connecting the data processing module with the hydrogen sensitive assembly. The hydrogen concentration is measured by adopting a catalytic combination principle, hydrogen and oxygen in gas in a closed space are subjected to catalytic combination reaction at normal temperature under the action of a catalyst, power supply for heating is not needed, and the energy consumption is reduced.

The invention refers to the fields of materials science and metrology and relates to calibration bodies as usable in analytical spectroscopy, for example. The problem addressed by the present invention is therefore that of producing electrically conductive calibration bodies, in particular for calibration of hydrogen measurement devices. The calibration bodies can be provided in large numbers, easily and inexpensively. The problem is solved by calibration bodies, in particular for calibration of hydrogen measurement devices, at least consisting of an electrically conductive porous sintered body, with an essentially homogeneous distribution of pores and / or defect sites, for example dislocations, stacking defects and / or twinned structures, in the sintered body, in which an adjustable hydrogen concentration is present depending on the number and size of the pores and / or defect sites in the sintered body, wherein the hydrogen is in physically and / or chemically bonded form in and / or at the surface of the pores and / or defect sites, and wherein the set hydrogen concentration in the calibration body decreases in the amount specified in each case over time.