485results about "Investigating phase/state change" patented technology

The invention relates to the technical field of medium phase state determination, in particular to a PVT analyzer and method suitable for multi-component fluid medium phase state determination, and the PVT analyzer comprises a determination assembly, a test cylinder, a balance cylinder, a pressurization cylinder, a gas distribution pipeline, a first driving mechanism and a second driving mechanism. The structure is reasonable and compact, combination of gas with various components can be achieved through the multiple gas cylinders and the gas distribution pipeline, mixing of the gas according to the set ratio can be achieved by adjusting the gas distribution valve, the multiple gas cylinders can inject the gas into a rodless cavity of the pressurization air cylinder through the gas distribution valve and the gas distribution pipeline, and the gas injection efficiency is improved. The second driving mechanism drives the piston rod of the pressurizing air cylinder to continuously input gas in the rodless cavity of the pressurizing air cylinder into the rodless cavity of the balance air cylinder through the pressurizing pipeline and the one-way valve, so that the pressure of the rodless cavity of the balance air cylinder can be increased; and the precise gas distribution and gas pre-pressurization functions of multi-component gas can be realized.

The invention relates to the technical field of oil product detection, in particular to a full-automatic condensation point determinator and a determination method.The full-automatic condensation point determinator comprises a base and a test tube, the top of the base is fixedly connected with a mounting base, the surface of the base and the surface of the mounting base are provided with a test bath mechanism and a supporting mechanism, and the test bath mechanism enables a motor to drive a test bath to rotate; the rotation angle of the motor is controlled through a preset program, precise positioning is achieved, the tedious operation of hole-by-hole adjustment of the original structure is avoided, the rotating shaft is locked through mechanical clamping, angle deviation in the testing process is prevented, then manual adjustment is replaced by the motor and the electric push rod, and the test efficiency is improved. The double locking effect is achieved, accidental displacement can be prevented, and precision and efficiency are improved; according to the clamping mechanism, the four arc-shaped clamping plates apply uniform radial pressure through the first springs to clamp the outer wall of the test tube, the inner diameters of the clamping plates are gradually increased from top to bottom, and the clamping mechanism is compatible with test tubes with different outer diameters.

The invention discloses a thermal insulation pipe fitting thermal insulation performance detection device, and particularly relates to the technical field of thermal insulation performance detection devices.The thermal insulation pipe fitting thermal insulation performance detection device comprises an outer frame, a detection assembly is slidably installed on the upper portion of the left side wall and the upper portion of the right side wall of the inner surface of the outer frame jointly, and a limiting assembly is fixedly installed on the lower portion of the outer surface of the detection assembly; an observation assembly is fixedly installed on the lower portion of the left side wall and the lower portion of the right side wall of the inner surface of the outer frame. According to the thermal insulation performance detection device for the thermal insulation pipe fitting, through the arranged detection assembly, in the using process, the detection assembly can be matched with the hydraulic cylinder to move downwards, then thermal insulation performance detection is conducted on the thermal insulation pipe fitting, meanwhile, the detection assembly is matched with the limiting assembly, and the thermal insulation pipe fitting can be limited; and after being limited, the limiting component is matched with the observation component, so that rotary thermal insulation performance detection on a plurality of thermal insulation pipe fittings is realized, the detection process of the whole device is relatively short, and sampling detection on the thermal insulation pipe fittings is convenient to realize.

According to the mixed phase ice crystal particle ground generation and icing experiment device and method, a water spray head generates a water drop particle swarm, an ice crystal particle generation device generates an ice crystal particle swarm, the water drop particle swarm and the ice crystal particle swarm are mixed in a controllable proportion to form an ice-water mixed phase, and then a mixed phase icing experiment can be achieved. The experimental device comprises an air duct system, a water drop atomization generation system, an ice crystal particle generation system, an impact surface system and a measurement system, the air duct system comprises an axial flow fan, an air duct and an experiment cavity; the impact surface system comprises an impact surface assembly, the water drop atomization generation system and the ice crystal particle generation system are used for providing water drops and ice crystals respectively, the axial flow fan provides high-speed airflow, the water drops and the ice crystals are conveyed through the air duct to impact the impact surface assembly at a high speed, and an impact icing experiment of a mixed phase is achieved; the measuring system is used for measuring the air speed, temperature and humidity in the air duct and measuring the thickness and temperature of an ice layer of the impact surface assembly.

The invention relates to the technical field of gas hydrate phase equilibrium tests, in particular to a gas hydrate phase equilibrium condition testing device and method under the normal pressure condition, and the testing device adopts a core framework integrating hydrate synthesis and phase equilibrium testing under the normal pressure into the same reaction kettle unit. And aiming at the functional difference of phase balance test under synthesis and normal pressure, independent high and low temperature control subsystems and pressure control modules are respectively arranged, so that the efficiency of a high-pressure synthesis stage is guaranteed, and the precision requirement of a low-pressure test stage is met. According to the testing method, a constant-volume gradual heating decomposition method is adopted, high-precision micro-pressure change monitoring is combined, and the phase equilibrium point of the hydrate under the low-pressure condition can be accurately captured. The problem that hydrate phase equilibrium experiment data in the area near the normal pressure is deficient is solved, and key data support can be provided for model verification and safety design.

The invention discloses a cold region coating concrete critical freeze-thaw frequency estimation and service life prediction method and system, and the method comprises the steps: firstly obtaining a plurality of groups of indoor rapid freeze-thaw test data to construct a sample data set; and constructing a damage model for representing the relationship between the freezing and thawing cycle times and the freezing and thawing damage degree of the coating concrete. And then on the basis of the constructed sample data set, an optimization algorithm is adopted to search for a global optimal model parameter combination capable of enabling an output result of the damage model to be optimal, an optimal damage model is constructed on the basis of the searched global optimal model parameter combination, and a quantitative relation between the damage degree and the freezing and thawing cycle number is established. And finally, according to a damage degree threshold value specified by the coating concrete to be estimated, performing inversion calculation through the optimal damage model, accurately estimating the indoor critical freeze-thaw times required by attenuation of the coating concrete to the damage degree threshold value, and providing a basis for subsequent accurate prediction of the service life of the coating concrete.

The invention provides a method for determining the spontaneous combustion evolution process of end slope coal of a strip mine, and belongs to the field of geotechnical engineering geological disaster prevention and control and the field of mine safety and environmental protection. Updating the porosity, the permeability and the range of the combustion space area in the pre-established three-dimensional geologic model by adopting the three-dimensional distribution of the porosity of the bending subsidence zone, the permeability of the fissure zone, the permeability of the caving zone and the porosity of the caving zone in the combustion space area; performing coal fire evolution simulation again according to the updated pre-established three-dimensional geologic model to obtain a coal fire development range, an updated real-time temperature field range and a gas concentration field; and if the combustion cannot be continued, outputting a final coal fire development range and an updated real-time temperature field range. According to the method, the efficiency and accuracy of open-pit mine end slope coal fire treatment are effectively improved.

The invention relates to the technical field of high-temperature experiment earth science, in particular to a sulfide standard sample and a preparation method thereof. The method comprises the following steps: preparing a raw material of a sulfide standard sample based on a target element component in a target natural sulfide and the content of the target element component; a quartz tube with one open end and one closed end is filled with first predetermined height quartz powder, a raw material of a sulfide standard sample, second predetermined height quartz powder or a quartz column, elemental sulfur, and third predetermined height quartz powder and / or a quartz column in sequence; sealing the filled quartz tube; and performing heat treatment on the raw materials of the sulfide standard sample in the sealed quartz tube to obtain the sulfide standard sample. According to the method, high-resolution analysis of micro-area information can be realized by utilizing the in-situ standard sample, so that irreplaceability is realized, in-situ analysis does not need a complicated pretreatment process, and a solid sample can be directly analyzed and measured.

The invention is suitable for the technical field of heat pipe experiment systems, and provides a heat pipe experiment system and method based on visual visualization and dual-seal temperature control, and the system comprises a visual heat pipe, a temperature adjustment module, a data collection module, a liquid injection module and a glass temperature monitoring feedback module. The visual heat pipe adopts an aluminum alloy cover plate, visual glass and a copper substrate to form a double-sealing structure. The system integrates a glass temperature monitoring and feedback mechanism, prevents the observation window from fogging, prevents the temperature of the observation window from being too high, and guarantees high-definition visual observation. And the data acquisition module synchronously records the thermal parameters and the dynamic image of the condensed liquid drop, and quantitatively analyzes the behavior of the liquid drop through an image processing technology. The system can realize high-definition observation, high-precision temperature control and quantitative analysis of the internal condensation process of the flat heat pipe at different inclination angles and under different working conditions, and is suitable for in-depth research of a phase-change heat exchange mechanism and heat pipe performance.

The utility model provides a concrete setting time detection device. The concrete setting time detection device comprises a box body, a constant temperature system, a sample bearing system and a test cleaning system, the box body is provided with a top cover which can be opened and closed, the sample bearing system and the constant temperature system are arranged in the box body, the sample bearing system comprises a bearing disc which is provided with a sample groove and can rotate, and the constant temperature system is located above the sample bearing system. On the other hand, the sample is covered when the test is not performed. The test cleaning system comprises a translation module and a lifting module which are used for driving the probe to move, and the probe enters a cleaning water tank to be cleaned and subsequently dried after being tested. The device is simple in structure and high in automation degree, and the detection efficiency is greatly improved.

The invention provides a modified engineering plastic melt index real-time monitoring method which comprises the following steps: determining a melt index difference value of adjacent monitoring points by acquiring a melt index value of each section of an extrusion production line; obtaining the number of shearing cycles of the extrusion production line, identifying the fiber shearing damage degree of each section according to the melt index difference and the number of shearing cycles to obtain fiber damage distribution, and determining the fiber fracture position according to the fiber damage distribution; the melt index difference value corresponding to the fiber fracture position is analyzed by obtaining the melt index of the fiber fracture position, and the monitoring point interval is dynamically adjusted through the melt index difference value; and obtaining the melt index value and the fiber shortening amplitude after the interval adjustment of the monitoring points, and comparing the melt index change and the fiber length loss of each monitoring point to obtain the corresponding distribution of the fiber shortening amplitude and the melt index value.

The disclosure aims to provide a thermoplastic resin composition having good processibility, a molded article, and a method for producing a thermoplastic resin composition. Provided is a thermoplastic resin composition containing: a resin (A); and a thermoplastic resin (B), the resin (A) containing a structural unit represented by the following formula 1 and having a dispersed particle size of 1 to 100 µm:         -X-(CR1R2)n-Y-(CR3R4)m-Z-     (formula 1).

The invention provides an evaporation section simulator, a visual test section and a visual test system. The evaporation section simulator comprises a light-transmitting bearing container, at least one supporting piece and a liquid absorbing core. The light-transmitting bearing container is provided with a containing cavity used for containing a liquid metal working medium. The at least one supporting piece is arranged on the light-transmitting bearing container and located in the containing cavity; the supporting piece is located on the heat conduction wall of the light-transmitting bearing container, and the heat conduction wall faces the heating piece. The liquid absorbing core is separably arranged on the top of at least one supporting piece. The evaporation section simulator provided by the invention is simple in structure. The supporting piece is arranged on the heat conduction wall and close to the heating piece, the heat transfer characteristic of the alkali metal heat pipe under the real working condition is easily simulated, and the generation process and the triggering characteristic of boiling criticality are conveniently observed and researched.

The invention discloses a submarine cable insulating material comprehensive aging evaluation method and system based on a time scaling equivalent axis, and relates to the technical field of submarine cable insulating material aging evaluation. The method aims at solving the problems that equivalent alignment of acceleration and natural aging data cannot be achieved, multi-index evaluation is contradictory, and the evaluation period is long in an existing method. The method comprises the following steps: acquiring a plurality of preset performance parameters of a submarine cable insulation material after an electric-thermal-force multi-physical field accelerated aging test, synthesizing a comprehensive aging index after homodromous mapping and robust standardization processing, establishing equivalent mapping of accelerated and natural service time through a linear scaling coefficient, and calculating the aging index of the submarine cable insulation material according to the equivalent mapping. And a service life evaluation result or reliability warning information is output after consistency checking. According to the technical scheme, the aging state and the service life of the submarine cable insulating material can be accurately and efficiently evaluated, and support is provided for material screening, service life evaluation and safety decision making of submarine cable engineering.

The invention provides a method for testing the phase change temperature of a phase change product. The method comprises the following steps: weighing a phase change material with specified mass; clamping the phase change material between two glass plates, horizontally placing the phase change material, and continuously applying constant pressure to the phase change material to obtain a pressurized test body; according to a preset temperature gradient, placing the pressurized test body in a heating device which is set to a target temperature for several times, and carrying out heat preservation for a specified time; or, multiple pressurized test bodies are taken again, the multiple pressurized test bodies are synchronously placed in the heating devices with different target temperatures set according to the preset temperature gradient respectively, and heat preservation is conducted for the designated time; taking out the pressurized test body after keeping the temperature for a specified time, cooling to room temperature, and measuring the diameter of the phase change material to obtain diameter data of the phase change material at different temperatures. The phase change temperature is judged by utilizing the sudden change point of the diameter-temperature curve, a precise instrument is not needed, the cost is low, the operation is simple and convenient, and the problems of expensive equipment, low universality and the like in the prior art are solved.

This invention relates to the field of water droplet impact experiment technology, and particularly to a method, apparatus, and impact experiment method / system for forming large supercooled and supercooled water droplets. The method for forming large supercooled and supercooled water droplets includes: forming large water droplets; controlling the large water droplets to be in a suspended state; lowering the temperature of the large water droplets; and obtaining a first temperature of the large water droplets, wherein a large supercooled and supercooled water droplet is considered to be a large supercooled and supercooled water droplet when the first temperature is less than -10°C. The impact experiment method for large supercooled and supercooled water droplets includes: forming supercooled water droplets according to the method; controlling the free fall of the supercooled water droplets to impact a substrate; obtaining images of the dynamic phenomena of the supercooled water droplets impacting the substrate; and obtaining the mathematical model required for the experiment based on the images. This invention can achieve accurate and efficient control of the temperature of the supercooled water droplets, while accurately observing the phase transformation and nucleation phenomena during the impact experiment, facilitating the more realistic formation of the mathematical model required for the experiment.

The invention relates to a thermal analysis method and a measuring device for a solidification process after modification treatment of aluminum and aluminum alloy, and the thermal analysis method comprises the following steps: adding seed crystal particles into an overheated melt in a vacuum environment or an inert atmosphere through a feeding device; cooling and solidifying the overheated melt, and collecting and recording a cooling curve T-t of the seed crystal particles through a high-speed temperature collecting device; the cooling curve is subjected to derivation calculation, and thermal characteristic parameters in the melt solidification process are represented; comparing the thermal characteristic parameters, and judging the deterioration effect. According to the method, the seed crystal particles are placed into the melt, melt solidification data are collected, and efficient judgment and high-throughput screening of the seed crystal particles and the second-phase modified refined seed crystal particles in the aluminum alloy are achieved by means of the quantitative relation among the seed crystal particle characteristics, the local temperature and the supercooling degree.

The invention relates to the technical field of oil product performance tests, in particular to a small portable detection tester control method, device and equipment and a storage medium, and the method comprises the steps: obtaining a detection instruction; acquiring spectral characteristics of the test article in real time; outputting a rapid cooling signal based on the detection instruction; whether the test article is solidified or not is judged in real time based on the spectral characteristics; and if the test article is solidified, stopping outputting the rapid cooling signal and outputting a first slow cooling signal. The method has the advantages that the automation degree can be improved, the accuracy of test results is improved, and time waste is reduced.

The invention belongs to the technical field of pellet roasting accurate control, and provides a multi-module linkage control method for improving pellet roasting test data repeatability, and the core is that multi-module linkage control is realized through four steps of segmented heating, accurate temperature measurement, sample pushing and data recording; the method solves the problems of insufficient heating interval, extensive temperature control, large manual error and the like of old-fashioned equipment, eliminates manual intervention, improves test data repeatability, is high in automation degree and excellent in efficiency, can adapt to conventional and special pellet roasting tests, provides reliable data support for pellet process optimization, and is suitable for popularization and application. The method is suitable for pellet research and development and quality control scenes in the iron and steel industry.

The application discloses a cross-flow batch type circulating grain dryer drying circulation demarcation point prediction positioning system and method, which comprises a 3D radar material level scanner, a temperature sensor, a rotating speed sensor, a grain moisture sensor, a signal processing circuit, a data processing system and a man-machine interface; the 3D radar material level scanner, the temperature sensor, the rotating speed sensor and the grain moisture sensor are connected to the signal processing circuit; the signal processing circuit is connected to the data processing system; and the data processing system is connected to the man-machine interface. The application effectively solves the problem of poor positioning precision of the drying circulation demarcation point in the grain drying process of the grain dryer.

The present invention provides a method of determining testing parameters of a melt flow rate testing apparatus, comprising the steps of: (i) providing a reference input indicative of a selection of a melt flow rate testing procedure from a predetermined list of melt flow rate testing procedures; (ii) providing a characteristic input indicative of a load mass and a testing temperature for melt flow rate testing; (iii) providing a sample input indicative of an estimated value of the melt flow rate of the sample; and (iv) determining at least one characteristic testing parameter for the melt flow rate testing apparatus, utilising a representative value generated from a predetermined combination of any one of said reference input, said characteristic input and said sample input.

In an embodiment is provided a method for measuring a vapor-liquid transition of a substance, the method including introducing a substance into a sample cell of a calorimetric block of a differential scanning calorimeter (DSC) at a first initial pressure, the system volume being constant; maintaining the substance in a vapor phase; cooling the substance at a cooling rate; and generating a thermogram. In another embodiment is provided a method for measuring a vapor-liquid transition of a substance, the method including introducing a substance into a sample cell of a calorimetric block of a DSC at a first initial pressure, the system volume being constant; maintaining the substance in a liquid phase; heating the substance at a heating rate; and generating a thermogram. In another embodiment is provided a method for measuring a vapor-liquid transition of a substance in the presence of an adsorbent.

The invention discloses a modularized multifunctional high-temperature material experiment device applied to a space station, and relates to the technical field of experiment devices, the modularized multifunctional high-temperature material experiment device comprises a cabinet body, a batch sample management module, a high-temperature heating module, an X-ray imaging module and an electric control module; a transverse transposition assembly, a longitudinal lifting assembly and an in-situ sensing assembly are arranged in the batch sample management module, a transfer chain of the transverse transposition assembly fixes a plurality of sample ampoules in a magnetic attraction mode, and the lifting end of the longitudinal lifting assembly is provided with a mechanical claw which is naturally closed and is opened when abutting against the limiting support; the in-situ sensing assembly monitors the state of the sample ampoule in real time; the high-temperature heating module is arranged at the lower end of the batch sample management module and consists of a plurality of furnace bodies which are independently driven and independently controlled in temperature, and heating channels of the furnace bodies can be communicated and coincide with the axes of the sample ampoules; the X-ray imaging module observes the melting and solidification process of the sample in real time, and the electric control module is in communication connection with all the modules. The system is diversified in function and high in system integration.

The invention relates to a dissolution testing method for soluble metal, and in the whole period of sample dissolution testing, dissolution products are separated and quantitatively recorded, and then dissolution rate is obtained, fed back in time and completely recorded. According to the invention, the dissolution condition and rate of the material can be recorded in real time, and the obtained dissolution rate data is real and accurate; in the dissolution testing process, the device is completely automatic, simple to operate, timely and accurate.

The invention relates to the technical field of metal material performance detection, and discloses a method for detecting ductile-brittle transition temperature of a metal material based on a thermal method. The method comprises the following steps: acquiring the average grain size of a material through three-dimensional characterization, quantitatively estimating the movable dislocation density generated by grain boundary thermal activation emission at a specific temperature in combination with a preset dislocation emission coefficient, and linearly superposing the movable dislocation density with the inherent pre-stored movable dislocation density of the material to obtain a total movable dislocation density estimated value. And comparing the total movable dislocation density calculated at different temperatures with the ductile-brittle transition critical threshold obtained from the material knowledge base to determine the critical temperature meeting the condition, namely the ductile-brittle transition temperature. According to the method, the mechanical prediction of the ductile-brittle transition temperature is realized by quantifying the contribution of a key dislocation source from a plastic deformation microphysical mechanism, and the dependence of a traditional method on a large number of destructive experiments is reduced.

A device may include a memory storing instructions and a processor configured to execute the instructions to determine an initial mass of a sample; distill the sample up to at least a thermal destruction temperature; record, at a set of time points during the distilling, vapor temperature values, liquid temperature values, and vapor pressure values associated with the sample; and determine a residual mass of the sample. The processor may be further configured to generate a pressure curve based on the vapor pressure values; calculate a summary integral surface for the generated pressure curve; and generate a distillation curve that relates the vapor temperature values and the liquid temperature values to mass percentage of the sample that has evaporated, based on the calculated summary integral surface, the initial mass of the sample, and the residual mass of the sample.

The application discloses a method for evaluating the dissolving performance of soluble material for a fracturing tool. The soluble material sample is put into a clamping sleeve and dissolved in a dissolving solution. A curve is drawn according to the remaining mass of the sample measured in the dissolving process and the dissolving time. The dissolving rate is calculated according to the slope of the straight line segment in the middle part of the curve. The stable dissolving state of the soluble material sample is obtained, so that the dissolving performance of the soluble material is accurately evaluated.

The application relates to a current sensor performance improvement method based on a magnetic coupling agent, which realizes the wide adjustment of key mechanical characteristics such as paste hardness and temperature stability by accurately setting key mechanical performance indexes of the magnetic coupling agent paste and finely regulating based on specific conditions of an actual application environment and sensor magnetic circuit characteristic types. Meanwhile, an environment adaptability evaluation strategy based on two-dimensional material science characterization technology is introduced to realize real-time monitoring and optimization of paste component distribution ratios, so that effective suppression of magnetic circuit noise and efficient improvement of the overall performance of the current sensor are ensured. The reduction of the noise directly improves the measurement accuracy of the current sensor, so that the measurement of the current parameter is more accurate and reliable in a complex and changeable power system environment.

The present application relates to a kind of carbon smoke particle surface water vapor phase change test system and method, belong to phase change test technical field, carbon smoke particle sampling sub-system is used to provide primary carbon smoke particle or secondary carbon smoke particle to sample bin, temperature / pressure control subsystem is used to adjust the temperature and pressure of sample bin, so that sample bin is at predetermined temperature and predetermined pressure, predetermined humidity water vapor generation subsystem is used to provide predetermined humidity water vapor to sample bin, detection component is used to detect the phase change of predetermined humidity water vapor on the surface of primary carbon smoke particle or secondary carbon smoke particle at predetermined temperature and predetermined pressure, so that the temperature-pressure-humidity of sample bin can be realized coordinated control, carries out carbon smoke particle surface water vapor phase change test research under different temperature, humidity, pressure conditions.