17 results about "Thermal emittance" patented technology

The invention relates to the technical field of laser material processing, and discloses a laser annealing temperature control method and device.The method comprises the steps that the specific heat capacity, the heat conductivity coefficient, the heat diffusivity, the heat radiation rate, the heat reflectivity and the heat loss coefficient are obtained, and a material thermal characteristic model is established; performing grid division according to the material thermal characteristic model to obtain a laser energy density parameter; extracting a thermal strain coefficient according to the laser energy density parameter, and establishing a temperature-thermal strain mapping relation prediction model; dynamically adjusting a laser power proportion and a pulse width time sequence according to the temperature-thermal strain mapping relation prediction model to obtain temperature field distribution data; according to the temperature field distribution data, carrying out shortest path analysis to obtain a temperature regulation and control decision; and according to the temperature regulation and control decision, inputting a preset control regulation model, and combining reinforcement learning iteration optimization parameters to obtain a temperature control scheme. According to the method, large-range temperature crossing and fine adjustment in an extremely short time can be realized.

The invention discloses a biological tissue internal temperature microwave chromatography method and system, and belongs to the technical field of microwave measurement. The problem that the internal temperature of the biological tissue cannot be accurately obtained by adopting a microwave radiation temperature measurement technology nowadays is solved. The method comprises the following steps: acquiring environmental thermal radiation rates under different environmental conditions, and acquiring temperature distribution data of a human tissue profile to be subjected to temperature measurement along with depth change under different environmental conditions by utilizing a real three-dimensional anatomical model, a heat conduction equation and a thermal radiation equation of the human tissue to be subjected to temperature measurement; calculating dielectric constants of the human tissue to be subjected to temperature measurement under different frequencies, and obtaining radiation brightness temperature data of different frequencies under different environmental conditions by combining the temperature distribution data and a real three-dimensional anatomical model of the human tissue to be subjected to temperature measurement; constructing a brightness temperature-temperature conversion matrix by adopting a least square method; and acquiring brightness temperature data of different frequencies of human tissue to be subjected to temperature measurement, substituting the brightness temperature data into the brightness temperature-temperature conversion matrix, and performing inversion to obtain temperatures of different depths of the human tissue to be subjected to temperature measurement. The method is suitable for temperature measurement.

Nanofibrous materials and their fabrication by electrospinning are disclosed for passive temperature control on earth and in outer space. The materials combine high solar reflectivity with high thermal emittance in the infrared region, including in the long wavelength atmospheric window region between 8 μm and 13 μm. The materials include nanofibrous PTFE / PEO and silica materials. The physical properties of the materials are suitable for extraterrestrial as well as terrestrial applications.

The heat dissipation effect and the electricity removal effect of the yarn winding device are improved. The yarn winding device (10) includes a winding unit (2), a circuit board (80), a power supply device (81), a plate member (70), and a housing (60). The winding unit (2) performs a winding operation of winding a yarn (11) and forming a package (23). The circuit board (80) constitutes a control unit (55) for controlling the winding unit (2), and is equipped with an electronic component. The power supply device (81) supplies power to the circuit board (80). A power supply device (81) is disposed on the plate member (70). In the housing (60), at least a part of a constituent member is made of resin. The case (60) encloses a space in which the circuit board (80), the power supply device (81), and the board member (70) are housed. The plate member (70) has a conductive base material layer and a radiation layer formed on the outer surface of the base material layer. The heat radiation rate of the radiation layer is higher than the heat radiation rate when the substrate layer is exposed to the outside.

This application provides a wafer boat, a batch processing apparatus, and a low-pressure vapor deposition method. The wafer boat is used to deposit a product film layer on the front side of a product wafer, including adjacent first and second regions. The first region includes multiple product wafer trenches, and the second region includes a monitoring wafer trench. The second region is located on the support side of the product wafer trenches. The product wafer trenches support the product wafers and expose their back sides, with a first spacing between them. The monitoring wafer trenches support monitoring wafers and expose their back sides, with a second spacing between the first and second regions. The ratio of the first spacing to the second spacing is positively correlated with the ratio of the thermal emissivity of the film layer on the back side of the product wafers to the film layer on the back side of the monitoring wafers. This application can improve the uniformity of the product film layer thickness between product wafers at different locations on the wafer boat.

Cementitious system and / or concrete compositions having enhanced sunlight reflectance and thermal emittance and related methods are generally described.

The present invention provides a surface plasmon optical fiber with high thermal radiation performance, comprising an optical fiber core and a cladding. A metal layer arranged in a porous array is provided outside the optical fiber cladding. A thermal emissivity layer is provided on the side of the metal layer away from the optical fiber core, and a cooling layer is provided on the side of the thermal emissivity layer away from the optical fiber core. The optical fiber of the present invention utilizes the metal layer arranged in a porous array so that the cladding light excites surface plasmons at the interface between the metal layer and the cladding; the heat carried by the surface plasmon wave is transmitted through the thermal emissivity layer mainly by thermal radiation, in combination with heat conduction and heat convection. The optical fiber of the present invention can dissipate the heat generated by the cladding light while filtering out the cladding light, effectively improving the beam quality of the output laser and solving the problem of excessively high local temperature of the optical fiber.

The application provides a thermal radiation micro-hole super surface for thermal camouflage and infrared encryption and a preparation method, and belongs to the technical field of micro-nano photonic devices.The thermal radiation micro-hole super surface is composed of deep hole structures arranged periodically on the surface of a metal material; the deep hole is a rotationally symmetric structure, and at least two different thermal emissivities exist, and the thermal emissivity is independently regulated by controlling the depth-width ratio of the deep hole cavity.The laser scanning processing of the thermal radiation micro-hole super surface can be realized by using a laser processing light path system based on a galvanometer scanning, and the prepared thermal radiation micro-hole super surface can be applied to thermal camouflage and infrared encryption technology, a pattern formed by the periodically arranged deep hole structures is processed on the surface of a metal material requiring thermal camouflage or infrared encryption, and the pattern is invisible under visible light and visible under infrared light.The application designs and prepares a high-resolution thermal radiation micro-hole super surface with adjustable local thermal radiation, and the thermal radiation micro-hole super surface can be widely applied in the fields of thermal camouflage and infrared encryption.

The application is suitable for the technical field of temperature measurement, and provides a method and device for calibrating temperature, electronic equipment and a computer readable storage medium. The method comprises: obtaining a to-be-calibrated temperature corresponding to a to-be-measured object when the to-be-measured object is in a working state; calculating a target temperature of the to-be-measured object according to a thermal emissivity corresponding to the to-be-measured object and the to-be-calibrated temperature; and taking the target temperature as an actual temperature of the to-be-measured object. Through the embodiment of the application, when a non-contact temperature measuring device is used to measure the cooking temperature of a cooking utensil, the actual temperature is obtained by calibrating and calculating the measured cooking temperature based on the thermal emissivity, the actual temperature is taken as the final cooking temperature, the accuracy of the final output cooking temperature is high, the reliability is good, and the application has strong ease of use and practicality.

To provide a display device.SOLUTION: A display device comprises: a display panel having a display section including an organic electroluminescent element, and a chassis having a front surface in contact with the display section and a rear surface opposite the front surface; a heat reflective member having a first surface facing a rear surface and a second surface on the opposite side of the first surface, superimposed on the rear surface, the second surface having a thermal emissivity lower than that of the rear surface; and a heating element installed opposite the second surface and overlapping the heat reflective member.SELECTED DRAWING: Figure 5

The invention relates to cooking equipment and a temperature measuring module. The cooking equipment comprises a pot body, a heating base and the temperature measuring module. The heating seat is used for bearing the pot body and heating the pot body; the temperature measuring module is mounted on the heating seat and is used for detecting the temperature of the pot body; the temperature measurement module comprises a detection assembly and a heat conduction assembly, and the heat conduction assembly is used for making contact with the pot body so as to conduct the temperature of the pot body and emit infrared radiation to the detection assembly; the detection assembly is used for receiving infrared radiation emitted by the heat conduction assembly to detect the temperature of the heat conduction assembly; wherein the heat conduction assembly comprises a metal body, and the metal body comprises a first surface used for making contact with the pot body and a second surface facing the detection assembly; a processing layer is arranged on the second surface, and the thermal radiation rate of the processing layer is larger than that of the metal body. By arranging the processing layer, the radiation rate of the second surface of the metal body is greatly improved, so that the precision of temperature measurement and temperature control is improved, and the temperature measurement error is reduced.

Handheld multi-sensor diagnostic device for non-destructive testing of vehicle body surfaces, including: • a handheld device; • an infrared sensor module configured to detect fluctuations in thermal emissivity; • a paint thickness measurement module configured to measure coating thickness; • a surface deformation detection module configured to detect dents and geometric irregularities; • a corrosion detection module configured to identify oxidation features; • an electronic processing unit configured to receive and analyze measurement data from the sensor modules; • a display interface configured to show diagnostic results; wherein the processing unit performs a sensor fusion analysis to produce a consolidated assessment of repainting, dent severity, presence of corrosion, and relative age of damage.

Cementitious system and / or concrete compositions having enhanced sunlight reflectance and thermal emittance and related methods are generally described.

The invention belongs to the technical field of material preparation, and discloses a nano modified fire-resistant heat-insulation radiation material and a preparation method thereof, the material comprises 36%-57% of aluminum ash sintered crystal whisker fiber, 1%-5% of nano zirconium-aluminum sol, 14%-19% of zirconium-containing high carbon ferrochrome slag blowing cotton, 3%-7% of nano gas phase method zirconium oxide, 7%-15% of titanium oxide modified aluminum oxide aerogel powder and 10%-30% of water. The aluminum ash solid waste and the zirconium-containing high-carbon ferro-chrome slag solid waste are utilized at high added value and are respectively prepared into nano whiskers and fibers, so that the high-temperature thermal resistance, the thermal radiation rate and the thermal shock resistance of the material are improved. The refractoriness of the prepared material is larger than 1500 DEG C, the radiance of the material in the range of 800-1500 DEG C is higher than 0.9, and the heat conductivity coefficient of the material in the temperature range of 800-1500 DEG C is lower than 0.1 W / (m.K).

The invention relates to the technical field of radiation refrigeration. The invention provides a temperature self-adaptive radiation temperature control film and a preparation method thereof, the temperature self-adaptive radiation temperature control film comprises a functional layer and a protective layer arranged on the upper side of the functional layer, the functional layer comprises a plurality of micro-units arranged in an array, the projection of each micro-unit on the protective layer is a polygon, the micro-units are provided with through holes along the vertical direction in a penetrating manner, and the through holes are communicated with the protective layer. The minimum distance between the vertexes of the two polygons formed by the two adjacent micro units is d1, the distance between the midpoints of the edges of the two polygons formed by the two adjacent micro units is d2, d1 is smaller than d2, and the micro units are made of vanadium dioxide. The temperature self-adaptive radiation temperature control film provided by the invention is low in cost, the thermal radiation rate can change along with the temperature, and the modulation depth of the thermal radiation rate is large.

Disclosed in the present application are a heating device and method for a vacuum coating apparatus, and a coating apparatus, belonging to the field of vacuum coating. The heating device for a vacuum coating apparatus comprises a heating plate, the heating plate comprising a peripheral area and a central area. The peripheral area and the central area have different thermal emissivity values, so as to heat corresponding areas of a coating substrate to enable temperature differences of all portions of the coating substrate to be within a preset range. After being subjected to surface treatment, the peripheral area and the central area obtain different thermal emissivity values, surface treatment modes being at least one of oxidation, wet treatment, coating coverage, film coating, sand blasting roughening, wire drawing, melt-blowing and polishing. The present application can perform differentiated heating on different positions of large-size coating substrates, so as to effectively reduce the temperature differences between silicon wafers on the same substrate, thus improving coating uniformity.

A roll-to-roll printed, mechanically flexible, temperature-adaptive radiative coating for thermal regulation of surfaces and fabrication methods are provided. The coating can include a thick metal layer, or a substrate and a metal layer deposited on the substrate, an array of tungsten-doped vanadium dioxide (WxV1−xO2) blocks on the metal layer, and a mid-infrared transparent dielectric layer over the blocks. This base coating may also have a layer of one or more colored pigments on the top surface of the base dielectric layer that is covered by a second IR transparent dielectric layer. Thermal emittance of the coating switches automatically as a function of ambient temperature in relation to the metal-insulator phase transition temperature (TMIT) of the WxV1−xO2 blocks in the array.