634results about "Material thermal conductivity" patented technology

The invention discloses an earth heat flow joint inversion calculation method, device and system, and a storage medium. The method comprises the following steps: 1, obtaining a temperature constraint value; 2, obtaining a thermal parameter constraint value; 3, determining value ranges of thermal conductivity and heat generation rate parameters of each layer section; 4, constructing an initial temperature profile; 5, carrying out inversion optimization to obtain an optimal thermal parameter; and 6, calculating and extracting an earth heat flow value. By adopting the technical scheme of the invention, a high-precision and high-reliability earth heat flow value can be obtained under the constraint of a small amount of measured data.

Methods and systems are provided for predicting thermal properties of a subsurface rock formation. A training dataset is derived from petrophysical properties of a plurality of formation rock samples and thermal properties of the plurality of formation rock samples. The training dataset is used to train a machine learning model that predicts label data representing the predefined set of thermal properties given input data representing the predefined set of petrophysical properties of an arbitrary formation rock sample. The machine learning model can be validated and deployed for use in predicting thermal properties of subsurface rock formations.

The invention provides a soil moisture content detection method based on unsteady heat conduction and optical fiber temperature measurement, which comprises the following steps: heating a soil body in a target measurement area based on an active heating method, and measuring the temperature value of the soil body at each moment under different radial distances from a heating source in the heating process; substituting the soil body temperature value at any moment in the heating process and the corresponding radial distance into a predetermined soil body moisture content relation model to obtain the soil body moisture content at the position corresponding to the radial distance from the heating source in the target measurement area at the corresponding moment; and determining the soil mass moisture content of the target measurement area according to the soil mass moisture content at each radial distance position from the heating source in the target measurement area at the corresponding moment. According to the method, the relationship between the soil moisture content and the soil temperature value is established, and in-situ monitoring and long-time monitoring of the large-range soil in the target measuring area are achieved through the soil temperature value obtained through the active heating method.

A thermal conductivity detector (1) is provided with: a cell block (2) provided with a measuring cell (10) in which a heating wire (12) for exchanging heat with a gas is arranged, the cell block (2) being provided with a cell inlet (11) for flowing the gas into the measuring cell (10) and a cell outlet (13) for flowing the gas out of the measuring cell (10); an outlet flow path (4) leading to the cell outlet (13) of the cell block (2); a buffer block (6) having a buffer space (14) in the inside and having a flow inlet (15) for flowing the gas into the buffer space (14) and a discharge outlet (16) for discharging the gas from the buffer space (14), the flow inlet (15) being fluidly connected to the outlet flow path (4); and a discharge member (8) holding a fluid resistance portion (20) for increasing a fluid resistance of the discharge outlet (16) and being installed to the buffer block (6) in a manner that the gas discharged from the discharge outlet (16) passes through the fluid resistance portion (20), the discharge member (8) being provided to be able to be detached from the buffer block (6) together with the fluid resistance portion (20).

The invention provides a registration type battery thermophysical parameter measurement method. A battery to be measured and a standard component group with known thermophysical properties are placed in the same air environment for synchronous heating and temperature measurement. The simulation curve and the actually measured temperature curve of the standard component are overlapped through the registration technology, the convective heat transfer coefficient of the environment is accurately inverted, and the function relation of the convective heat transfer coefficient is established. The function relation is applied to the battery to be tested, heat lost by convective heat transfer is compensated, and the specific heat capacity and the heat conductivity are synchronously obtained through one experiment process. According to the invention, the dependence of a traditional measurement method on a vacuum insulation environment is broken through, the problems of high measurement cost, low efficiency and poor data collaboration in the prior art are solved, and high-precision integrated measurement in a common environment is realized.

The invention belongs to the technical field of industrial equipment state monitoring and fault diagnosis, and particularly relates to a plate-type evaporator scaling state online monitoring and early warning system which comprises a data acquisition module, a data processing module, an abnormal reason judgment module and a risk early warning module. Different performance abnormity inducements such as scaling, non-condensable gas accumulation and mechanical change can be effectively distinguished, and the method has localized abnormity positioning and multi-factor intelligent traceability capabilities, so that misjudgment can be remarkably reduced; the actual heat transfer efficiency and on-way resistance are obtained through calculation, a comprehensive abnormal value and linear weighted fusion are constructed through a threshold exceeding degree, and visual support of scaling degree grading and a development trend is provided in combination with a time sequence change trend, so that an operator can scientifically plan shutdown cleaning time according to the scaling development trend.

The invention provides a soil moisture content calculation method based on an optical fiber temperature measurement technology, which comprises the following steps: acquiring a dry soil heat conductivity coefficient, dry soil density and porosity of a target area and a heat conductivity coefficient and density of water in the target area as soil basic parameters; based on an active heating method, obtaining temperature measurement values of the target area under different radial distances after the target area is heated to a steady state; the soil body basic parameters and the temperature measurement value are substituted into a soil body moisture content formula, and the soil body moisture content of the target area is obtained; wherein the soil mass moisture content formula is pre-constructed based on a soil mass steady-state heat conduction equation and the relationship between the heat conduction coefficient and the soil mass basic parameters, and represents the relationship among the heat conduction coefficient of the soil mass, the temperature and the soil mass moisture content. According to the method, the soil moisture content formula representing the relation among the soil basic parameters, the temperature measurement value and the soil moisture content is constructed, and tedious laboratory operation needed by an existing active heating method is simplified.

The invention discloses a test device and method for in-situ monitoring of hydrates by using thermal-electric coupling, and belongs to the technical field of experiments for simulating generation and decomposition of hydrates in laboratories. The device comprises a hydrate synthesis and decomposition system, a temperature control system, a pressure control system, a thermal-electric parameter measurement system, a gas collection system and a data acquisition and user monitoring system, wherein a multi-point temperature sensor, a resistivity measurement probe and a heat conductivity coefficient measurement probe are arranged in a reaction kettle cavity; in-situ and real-time monitoring of multiple physical property parameters such as temperature distribution, resistivity change and heat conductivity coefficient in the whole process of generation and decomposition of the hydrate sample can be realized. According to the invention, thermal-electric coupling monitoring can be realized under high-pressure and low-temperature conditions, and a high-precision means is provided for hydrate formation mechanism research and exploitation processes.

The invention provides a prediction method based on the wear state of a steel-based ceramic wear-resistant component, and relates to the technical field of material life evaluation, and the prediction method comprises the following steps: transmitting an excitation eddy current containing a first frequency and a second frequency to a steel substrate, and receiving a response signal modulated by the state of a steel substrate and ceramic-steel bonding interface; processing the response signals corresponding to the first frequency and the second frequency, and extracting a first phase variation of the first frequency relative to a first reference signal corresponding to the initial health state of the component and a second phase variation of a second reference signal corresponding to the second frequency; the difference quantity between the first phase change quantity and the second phase change quantity is calculated, and the heat conduction state change of the ceramic-steel bonding interface is represented; and acquiring the real-time working temperature of the wear-resistant part, evaluating the current state grade of the ceramic-steel bonding interface based on the real-time working temperature and the difference quantity, and predicting the residual safe service time of the ceramic wear-resistant layer in combination with the change trend of the difference quantity along with time.

A metrology system may measure thermal conductance across an interface between a first material layer bonded to a second material layer. The first material layer may include a first outward facing and the second material layer may include a second outward facing surface. The system may include a heating source which provides periodically varying heat across the first outward facing surface, and a heat sink in contact with the second outward facing surface. The system may further include a first thermal measurement device configured to measure a temperature of the first outward facing surface, and a second thermal measurement device configured to measure a temperature of the second outward facing surface. The system may generate, based on a plurality of measurements acquired over time, a thermal conductance measurement across the interface between the first material layer bonded to the second material layer.

One or more implementations of the present disclosure relate to a wireless, multi-sensor food thermometer that includes a temperature probe having a linear array of temperature sensors that are operative to measure: temperature profiles within a food product during a cooking process, a temperature at a core of the food product, a temperature at the surface of the food product, and a temperature of the ambient cooking environment in which the food is being cooked. The temperature probe includes a wireless interface that transmits temperature information to one or more external devices for use thereby. Rather than transmitting raw temperature data, the temperature probe may transmit coefficients that correspond to a function that describes the temperature profile within the food or parameters necessary to solve a governing heat equation, which reduces data transmission requirements and reduces power consumption. The food thermometer may include a charger case that houses the temperature probe and charges a power source of the temperature probe using a replaceable battery.

A method of analyzing an additive manufacturing powder, comprising: providing a layer of the additive manufacturing powder on a structure; irradiating the powder with a localized energy beam; measuring a thermal response over time of a region of the additive manufacturing powder in conjunction with the irradiating; and processing the measured thermal response with a classification processor trained with data dependent on at least one classification criterion selected from the group consisting of a composition of the additive manufacturing powder, a reuse history of a portion of the additive manufacturing powder, particle size characteristics of the additive manufacturing powder, an aging of the additive manufacturing powder, an oxidation of the additive manufacturing powder, and an adulteration of the additive manufacturing powder.

The invention provides a refrigerant gas leakage type detection method and device, electronic equipment and a storage medium. The method comprises the steps that leaked refrigerant gas to be detected is collected; an infrared light source is controlled to emit infrared light, and the infrared light passes through the leaked refrigerant gas and then enters a double-channel optical filter; obtaining first infrared light which is filtered by the dual-channel optical filter, is used for detecting the type of the refrigerant gas and has a first wavelength, and second infrared light which is used for eliminating environmental influence and has a second wavelength; calculating a carbon-hydrogen bond equivalent concentration matching value of the leaked refrigerant gas according to the first infrared light and the second infrared light; the heat conductivity of the leaked refrigerant gas is obtained; calculating a heat conductivity matching value of the leaked refrigerant gas according to the heat conductivity and the standard heat conductivity of the standard refrigerant gas; and determining the gas type of the leaked refrigerant gas according to the carbon-hydrogen bond equivalent concentration matching value and the thermal conductivity matching value. According to the invention, the leakage refrigerant gas type can be automatically identified, and the identification accuracy is high.

The utility model belongs to the technical field of battery heat conductivity coefficient testing, and discloses a battery heat conductivity coefficient testing device which comprises a heating film and two liquid cooling plates. The heating film is used for being clamped between two batteries to be tested, a center thermocouple is arranged at the center of the heating film, and the center thermocouple can collect the temperature of the center of the heating film. The two to-be-tested batteries are clamped between the two liquid cooling plates, a plurality of preset point positions are respectively arranged on two outer side surfaces, which are opposite to each other, of the two to-be-tested batteries, a plurality of first thermocouples and a plurality of second thermocouples are respectively arranged on the two outer side surfaces, the plurality of first thermocouples can collect temperatures of the plurality of preset point positions on one to-be-tested battery, and the plurality of second thermocouples can collect temperatures of the plurality of preset point positions on the other to-be-tested battery. And the plurality of second thermocouples can collect the temperature of a plurality of preset point positions on another battery to be detected. The battery heat conductivity coefficient testing device can accurately and quickly measure the anisotropic heat conductivity coefficient of the battery to be tested.

A detection device for detecting deposits and / or soiling on a sensor surface inside a vessel or a line containing a flowing medium, the detection device includes: a detection section; a thermally conductive main body; a heat or cold source arranged on the thermally conductive main body for producing a primary flow of heat between the heat or cold source and the sensor surface and a secondary flow of heat between the heat or cold source and a reference surface; a first temperature sensor on the thermally conductive main body at a first distance from the sensor surface, and a second temperature sensor on the thermally conductive main body at a second distance from the sensor surface; a thermally conductive enveloping body; the reference surface is part of the detection section, and the detection device includes exterior insulation that insulates the thermally conductive enveloping body.

The invention discloses a heat pipe thermophysical property testing device, system and method based on liquid cooling flow equalization, and the device comprises a liquid cooling flow equalization system which is provided with a plurality of parallel and mutually isolated flow channels, and a condensation section of a to-be-tested heat pipe is inserted into a liquid cooling cavity to form forced convection; an upper heating block and a lower heat insulation block of the heating unit clamp and fix an evaporation section of the heat pipe to be tested; the liquid cooling flow equalizing system is arranged on the inclination angle adjusting mechanism; the data acquisition unit comprises temperature sensors which are respectively arranged at liquid inlets and liquid outlets of the flow channels, and at least two temperature sensors which are arranged at a heat insulation section of the heat pipe to be tested; according to the system, a circulating water bath device, a high-pressure constant-flow pump, a filter and a testing device form a closed-loop liquid path. The real heat transfer amount of the heat pipe is inversely calculated through the heat absorption amount of the cooling liquid, the equivalent heat conductivity coefficient and the limit power are obtained by combining the two-point temperature difference of the heat insulation section, multiple heat pipes of different specifications are tested in parallel at a time, and the test efficiency and the data accuracy are improved.

The invention relates to the technical field of fuel cells, in particular to a fuel cell gas diffusion layer performance comprehensive evaluation method and system and electronic equipment. The method comprises the following steps: acquiring multiple evaluation parameters of a target gas diffusion layer in the fuel cell under an actual working condition; wherein the multiple evaluation parameters comprise a polarization test performance parameter, an electrochemical impedance spectroscopy test performance parameter and a heat conduction test performance parameter; and obtaining a pre-constructed comprehensive evaluation model, and substituting the multiple evaluation parameters into the comprehensive evaluation model to obtain a comprehensive evaluation result of the target gas diffusion layer. Therefore, according to the fuel cell gas diffusion layer performance comprehensive evaluation method and system and the electronic equipment provided by the invention, the problem that an existing evaluation system only measures a single function and neglects a synergistic effect is fundamentally solved, comprehensiveness of evaluation dimensions is realized, designers can be helped to avoid overview decision errors, and the evaluation precision is improved. And a clear basis for model selection or GDL structure optimization guidance can be provided for designers.

The invention discloses a one-dimensional heat flux density measuring device based on the Fourier law, and relates to the technical field of object heat flux density measurement. Comprising a heating unit, a sealing heat insulation unit, a cooling unit, a temperature acquisition unit and a data processing unit. The sealing heat insulation unit comprises a heat insulation material, an aluminum oxide ceramic tube, a sealing air layer, an outer layer supporting plate and a rubber or silica gel sealing ring. The heating unit comprises a high-temperature copper plate heating platform; the cooling unit comprises a water cooling head, a cooling water jacket and a cooling water tank, and is nested at the top of the sealed heat insulation unit; according to the temperature acquisition unit, a thermocouple is attached to the surface of a measured object and is connected with an external thermodetector; the data processing unit comprises an acquisition terminal and a computer, the acquisition terminal is connected with a USB interface of the computer and a USB interface of the thermodetector, and data acquired by the thermodetector is transmitted to the computer. The invention provides the heat flux density measuring device which is simple and convenient to assemble, low in construction cost and simple and convenient to calculate, and the measuring efficiency is improved.

The invention provides a method for measuring the heat conductivity coefficient of a nano adsorption material in a moisture absorption state, and relates to the technical field of measurement of the heat conductivity coefficient of an adsorption material. The method creatively realizes synchronous dynamic measurement and analysis of the heat conductivity coefficient of the nano adsorption material in a variable environment, improves the humidity control precision and real-time performance, accurately captures an adjustment mechanism of a light-humidity coupling effect on heat conduction, and also realizes accurate measurement and analysis of the heat conductivity coefficient of the nano adsorption material by constructing a light effect increment model and a two-dimensional damage map. And intelligent early warning and management of environmental risks are realized.

The application discloses a kind of in-pipe fluid temperature measurement method, system, electronic equipment and storage medium, it is related to in-pipe temperature measurement technical field, the method comprises: determining the fixed parameter of target to be measured, the flow rate of fluid, noise variance and observation variance;Fixed parameter includes pipe wall thickness, pipe wall material thermal conductivity, fluid convection heat transfer coefficient and air convection heat transfer coefficient;According to the optimal in-pipe temperature of last time and the flow rate of fluid, determine the predicted temperature of current time;According to the optimal covariance of last time and noise variance, determine the covariance of current time;The optimal covariance of last time is determined according to the weight coefficient of last time, covariance, fixed parameter and observation variance;According to the weight coefficient of current time, determine the covariance of current time, fixed parameter and observation variance;According to the predicted temperature of current time, weight coefficient, outer wall temperature, air temperature, fixed parameter and observation variance, determine the optimal in-pipe temperature of current time.The application expands the use range of in-pipe temperature measurement.

To provide a technology that enables machining simulation to be performed at higher speed than conventional techniques. [Solution] The information processing device includes a control unit. The control unit executes a process to acquire a voxel model used in a simulation. The voxel model is defined by a plurality of lattice points that constitute a collection of voxels. Each of the plurality of lattice points is associated with a label that indicates an attribute of the object at the position of the lattice point. The control unit executes a process to acquire processing information that defines the irradiation coordinates of a laser beam and the irradiation direction of the laser beam for each time step, and a process to sequentially update the labels associated with the lattice points within an area specified by the irradiation coordinates and irradiation direction to a state where additional processing has been performed, according to the time step.

This invention discloses a method for designing the material composition ratio of a self-heating adhesive layer for paved asphalt blankets, specifically relating to the material design field of self-heating adhesive layers for paved asphalt blankets. The self-heating adhesive layer for paved asphalt blankets consists of an adhesive and a heating agent. The adhesive is composed of SBS modified asphalt, and the heating agent is a uniform mixture of reduced iron powder, carbon powder, sodium chloride, and calcium oxide. This invention determines the optimal composition ratio of each component in the heating agent through heating tests, then calculates the unit heat output of the heating agent at this composition ratio, and finally designs the application ratio of the heating agent and adhesive based on the heat transfer characteristics between pavement layers. By calculating the application ratio of the heating agent and adhesive in the self-heating adhesive layer of paved asphalt blankets, this invention avoids the adhesive failing to heat to the required temperature due to an insufficient ratio of heating agent and adhesive, while simultaneously avoiding pavement layer separation due to an excessive ratio of heating agent and adhesive.

The invention relates to the technical field of diving suit detection, and discloses a high-pressure diving suit detection device and method, and the device comprises the following steps: a high-pressure simulation cabin which is used for simulating the high-pressure environment of a deep sea, and providing the testing conditions of a diving suit under different depth pressures; the warm dummy simulates a human body and can heat different parts of the dummy in an underwater high-pressure environment, so that real-time visualization of body surface temperatures of all the parts of the human body in the underwater high-pressure environment is achieved, temperature control data can be recorded in real time, and a diving suit in detection can be worn on the warm dummy in real time; and the temperature control system simulates the heat distribution and heat loss rule of the human body by adjusting the temperature of each part of the thermal dummy. Multi-dimensional environmental parameters including pressure, temperature and humidity can be simulated through the high-pressure simulation cabin, so that the actual working state of the diving suit in the deep sea can be effectively represented, comprehensive test conditions are provided, the test result is close to the real use situation, and the reliability and safety of the diving suit in the extreme environment are ensured.

The invention belongs to the technical field of generator stator coil materials, and particularly relates to a method and a system for evaluating aging resistance of a generator stator coil in a high-altitude environment. The method is based on research on service characteristics and evolution laws of a generator stator coil in a high-altitude environment; the aging resistance of the generator stator coil is evaluated through the following indexes for the first time: testing the breakdown voltage of the stator coil, the concentration of volatile organic compounds detected under the thermo-oxidative aging condition, the heat conductivity coefficient, the specific surface area of solid substances, the porosity and the liquid adsorption performance. The evaluation method provided by the invention has the advantages of accuracy and rapidness, and has a good application prospect.

A thermal measurement system includes a temperature-controlled chamber configured to house a Device Under Test (DUT) and a first temperature sensor to measure an external temperature of the DUT inside the temperature-controlled chamber. The thermal measurement system further includes a heating device for heating a test material outside the temperature-controlled chamber and a controller configured to control the heating device to heat the test material to the external temperature measured by the first temperature sensor of the DUT inside the temperature-controlled chamber. In one aspect, a thermethesiometer indicates a skin effect of a surface temperature of the test material outside the temperature-controlled chamber.

The utility model provides a heat conductivity coefficient testing device and a testing system, relates to the technical field of battery detection, and aims to solve the problem of high detection cost caused by customization of matched clamp equipment with corresponding sizes when heat conductivity coefficients of batteries with different sizes are detected to a certain extent. The utility model provides a heat conductivity coefficient testing device. The heat conductivity coefficient testing device comprises a box body, a cover plate, a heating assembly and a sliding assembly, a containing space is formed in the box body, the cover plate covers an opening of the box body, and the heating assembly is arranged at the bottom of the containing space. The sliding assembly comprises a sliding part and a first heat insulation part, the sliding part is at least located on one side wall of the box body and can penetrate through the side wall of the box body to slide relative to the box body, and the first heat insulation part is correspondingly connected with the sliding part so that at least one clamping face can be formed in the direction parallel to the side wall, where the sliding part is located, of the box body.

The invention discloses a dynamic nondestructive testing device which is used for improving the performance and the flexibility of the nondestructive testing device. The device comprises a shell, a base, an infrared camera shooting assembly, a heating assembly, a temperature sensor, a wireless transmission device, a first connecting rod moving assembly and a second connecting rod moving assembly. The shell is fixedly connected with the base; the infrared camera shooting assembly is fixed to the base and located outside the shell. The infrared camera shooting assembly is used for dynamically monitoring the state of an object. The temperature sensor is arranged on the base and used for monitoring the temperature of the heating assembly; the heating assembly is arranged on the base and used for heating an object; the first connecting rod moving assembly is arranged on the base and used for obstacle crossing movement. The second connecting rod moving assembly is connected with the first connecting rod moving assembly through a main transmission gear; the wireless transmission device is arranged on the base, and the infrared camera shooting assembly, the heating assembly, the temperature sensor, the first connecting rod moving assembly and the second connecting rod moving assembly are electrically connected with the wireless transmission device.

A method for detecting a defect in a bonded wafer includes receiving the bonded wafer on a wafer holder, the bonded wafer including a first structure bonded to a second structure, the first structure including first contacts, the second structure including second contacts, and the first structure bonded to the second structure forming a bonding layer including metal contacts between the first contacts and the second contacts. The method further includes illuminating a portion of the first structure for a first time duration to heat the portion of the first structure to a starting temperature, and detecting, using a light detector, a temperature map of the bonded wafer, the temperature map being detected after a second time duration. And the method further includes determining, based on the temperature map, the defect in the bonding layer of the bonded wafer.

To provide a heat transfer gas sensor system and a sensing method having high accuracy and sensitivity.SOLUTION: A heat transfer gas sensor system includes a measurement unit, a control unit, and a calculation unit. The measurement unit includes a sensor unit capable of measuring a resistance value and a heater unit capable of heating the sensor unit. The control unit has a heater control circuit capable of controlling heating and non-heating of the heater unit, and a timing control circuit capable of controlling timing of a control signal of heating and non-heating of the heater unit and an output signal from the sensor unit. The calculation unit acquires a first output signal from the sensor unit when the heater unit is not heating, and corrects a second output signal from the sensor unit when the heater unit is heating, using the first output signal.SELECTED DRAWING: Figure 1

A computer-implemented method of determining subsurface thermal conductivity of target soil is disclosed. The method comprises receiving, from a heat flow penetrometer that is surrounded by target soil, temperature data comprising a temperature at each time point of n time points, determining, for each time point a measured temperature difference, based on estimated values of thermal conductivity and volumetric heat capacity of the target soil, using a solution space to generate a calculated temperature difference for the estimated values of thermal conductivity and volumetric heat capacity for each of a predetermined series of time points of the solution space. The solution space comprises a plurality of values of thermal conductivity, a plurality of values of volumetric heat capacity, and pre-computed values of temperature difference for each combination of values of thermal conductivity and volumetric heat capacity and for each of the predetermined series of time points of the solution space. Unlocking insights from Geo-Data, the present invention further relates to improvements in sustainability and environmental developments: together we create a safe and liveable world.