1273 results about "Emissivity" patented technology

The invention discloses tempered low-emissivity coated glass, which comprises a tempered glass substrate and a composite metal film layer laminated on the substrate, and is tempered coated glass with three metal silver film layers. After a common glass substrate is plated with a composite metal film layer, toughening treatment is carried out, and after toughening treatment, all the metal film layers reflect, interfere and refract light, so that the glass is light blue in the sun, and the decoration and energy-saving effects are good; the visible light transmittance is high, the outdoor visible light reflectivity is low, the solar energy transmittance is low, and the solar energy reflectivity is high; the prepared hollow glass has better energy-saving effects of light control, heat insulation, heat preservation and the like, enables buildings to be closer to nature, is used for near-zero-energy-consumption buildings, enables the buildings to meet the requirements of the national standard GB55015-2021 General Standard for Energy conservation and Renewable Energy Utilization of Building, and has great contribution and significance on carbon neutralization and carbon peak reaching of the buildings.

The invention provides a non-contact multi-mode thermal imager temperature measurement method, and relates to the technical field of non-contact temperature measurement, and the method comprises the steps: collecting the three-dimensional structure information of a measured object, obtaining infrared thermal radiation data, and collecting meteorological parameters; identifying the material and the surface state of the object, and adjusting an infrared emissivity parameter by using a deep learning model; performing cross-modal feature alignment on the related data; and inputting the meteorological parameters into the environment interference model to correct the infrared signal, determining whether the temperature measurement data is qualified, and if yes, repeating until the temperature measurement of the measured area is completed. According to the invention, by fusing the multi-modal data and utilizing the deep learning model, the space-time attention mechanism, the environment interference model and the like, the dynamic calibration of the infrared emissivity, the feature alignment of the multi-modal data and the effective compensation of the environment interference are realized; the problems of large environmental interference, difficult emissivity calibration, insufficient complex scene adaptability and the like of a traditional method are solved, and the temperature measurement precision and reliability are improved.

The invention discloses a preparation method of a flexible material with double functions of radiation refrigeration and photothermal conversion storage, and relates to the field of composite phase change materials. The preparation method comprises the following steps: 1) preparing the flexible phase change material matrix by utilizing n-octadecane, SEBS and POE through hot pressing; 2) preparing a BaSO4 solution by using absolute ethyl alcohol, deionized water, a water-based defoaming agent, a water-based dispersing agent and an acrylic resin emulsion; (3) preparing an MXene solution; and 4) spraying the BaSO4 solution on the surface of one side of the flexible composite phase change material matrix by using a spray gun, and spraying the MXene solution on the surface of the other side of the flexible composite phase change material matrix to obtain the flexible composite phase change material. The radiation refrigeration layer can strongly reflect visible light and near-infrared light, has high emissivity in an infrared light area, especially in an atmospheric window wave band, reduces absorbed atmospheric heat radiation, reduces urban heat island effect caused by dense building groups in cities, and can effectively solve the problems of large day and night temperature difference and heat supply and demand in summer and winter.

The invention provides a SiO2 / TiO2 / PMMA radiation refrigeration film and a preparation method thereof, and relates to the technical field of passive daytime radiation refrigeration films. The radiation refrigeration film is prepared from the following raw materials: N, N-dimethylformamide, polymethyl methacrylate, silicon dioxide and titanium dioxide. The invention relates to a preparation method of a SiO2 / TiO2 / PMMA radiation refrigeration film. The preparation method comprises the steps of preparing silicon dioxide, preparing titanium dioxide, synthesizing composite sol and preparing the SiO2 / TiO2 / PMMA radiation refrigeration film. The SiO2 / TiO2 / PMMA radiation refrigeration film prepared by the invention has high reflectivity in the ultraviolet-visible-near infrared band and high emissivity in the infrared band, can realize 8.4 DEG C sub-environment refrigeration, and is low in cost and simple in process flow.

The invention discloses an aero-engine turbine blade multispectral temperature measurement method based on HPSOGA, and belongs to the technical field of turbine blade temperature measurement, and the method comprises the following steps: S1, collecting multispectral radiation data and background reflection radiation data of a turbine blade; s2, initializing an HPSOGA algorithm, and randomly generating an initial particle swarm; s3, calculating an environment complexity factor, updating the dynamic penalty function, and calculating a value of the dynamic penalty function; s4, constructing a multi-objective optimization function; s5, the fitness of all particles is calculated, and an individual optimal solution and a global optimal solution are obtained; s6, updating the speed and position of each particle by using an HPSOGA algorithm, and generating new particles; and iteratively executing the steps S3-S6 until the conditions are met, and outputting a global optimal solution. According to the method, the problems of low measurement precision, poor stability and the like when the turbine blade is subjected to temperature measurement are solved, the dynamic penalty function is introduced, the adaptability and the accuracy of an inversion temperature measurement algorithm are improved, and the reliability and the stability of temperature and emissivity calculation are improved by adopting a multi-target optimization strategy.

The invention discloses an automatic identification method and system for power transmission and transformation equipment based on visible light and infrared dual-light fusion. The method comprises the following steps that a visible light image and an infrared image of the same scene are synchronously collected through a dual-light camera carried by an unmanned aerial vehicle; preprocessing the visible light image and the infrared image, including denoising, geometric correction and spatial alignment, in the spatial alignment, feature points are extracted through an SURF algorithm, and image registration is optimized through an RANSAC algorithm; and feature extraction is carried out on the fused image by using a deep convolutional neural network OfficientNet-Lite, and a multi-scale feature map is generated. The method has the beneficial effects that high-precision identification is realized; a dynamic fusion strategy and an attention mechanism enable the insulator crack (gt; 0.1 mm), the detection rate reaches 92%; the anti-interference capability is high, the false alarm rate is reduced from 15% to 4% through a dust compensation algorithm, and the influence of emissivity errors is reduced through material self-adaptive calibration; the whole process from data acquisition to report generation is free of human intervention, and the labor cost is reduced by 70%.

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

A composite radiative cooling material includes a first layer including a reflective material, a second layer including a porous material, and a third layer including an emissive material. The optical properties of the respective materials and the arrangement of the respective layers cause the radiative cooling material to exhibit a total solar reflectance greater than 85%, and a thermal emissivity greater than 85% in a wavelength range of 8 to 13 μm. The layers may be in a vertically stacked arrangement, with the third layer capable of directly facing the sky when the composite radiative cooling material is installed for cooling a load, the second layer arranged under the third layer, and the first layer arranged under the second layer. The composite radiative cooling material may be thermally coupled to a cooling load to provide radiative cooling to the cooling load.

The invention relates to a high-temperature-resistant light stealth coating material and a preparation method thereof, and belongs to the technical field of functional materials, the high-temperature-resistant light stealth coating material comprises the following raw materials: boride, silicide, a titanate fluxing agent, metal coated carbide, a zinc oxide coated nano carbon material and a sintering aid; according to the prepared high-temperature-resistant light stealth coating material, the infrared emissivity at the wavelength of 3-5 [mu] m is 0.231-0.245, the infrared emissivity at the wavelength of 8-14 [mu] m is 0.424-0.441, the tensile bonding strength is 40.8-46.4 MPa, and the thermal shock resistance frequency is 153-167.

The invention particularly relates to a three-dimensional radiation field modeling method for performing infrared factor reasoning through poses. The method comprises the following steps: acquiring a to-be-processed target spatial position and target visual angle information; performing coding processing on the target spatial position and the target visual angle information to obtain a high-dimensional spatial position code and a visual angle information code; carrying out splicing processing on the spatial position code and the visual angle information code to obtain a fusion feature code; inputting the fusion feature code into a trained infrared image generation model, obtaining an environment radiation parameter, an extinction coefficient, a temperature parameter and an emissivity parameter, and determining a self-radiation parameter based on the temperature parameter and the emissivity parameter; and performing volume rendering processing on the self-radiation parameter, the environment radiation parameter and the extinction coefficient to obtain a target infrared image. According to the method, physical variables such as temperature and materials can be adaptively updated and adjusted, so that more accurate radiation brightness values can be obtained at different positions and viewing angles.

A method for coating a substrate, in which emissivity values (UE,n) and reflectance values (UR,n) are determined using pyrometers in order to control the temperature of the substrate. Since the wavelengths of the two pyrometers differ slightly, the raw temperature determined from the emissivity value (UE,n) cannot be optimally compensated for using the reflectance value (UR,n). The angular frequencies (ωE, ωR) of the curves of the two values (UE,n) and (UR,n) oscillating over time t differ slightly from one another, leading to an oscillation of the actual temperature value. To counteract this phenomenon, values modified by a numerical time transformation are used rather than the measured values.

The invention provides a cavity target infrared characteristic calculation ray tracing method, and belongs to the technical field of infrared tracing. The method comprises the following steps: importing a CFD data source; a cuboid space grid is generated, and CFD data space distribution is interpolated and reconstructed; a target material and temperature parameters are set; determining the position of a detector and forming a detection situation relationship; gridding a detection space in the transverse direction and the longitudinal direction at the position of the cavity object to form a field pixel space; constructing a reverse ray vector direction, and counting self reflection and reflection radiation of each triangular infinitesimal according to a recursive iteration mode; reconstructing a broadband spectral reflection coefficient according to the narrowband BRDF model and the broadband spectral emissivity; and determining the reflection direction of the infrared rays based on a bidirectional reflection distribution model to realize ray tracing. According to the invention, the control of any ray tracing depth can be realized, the intersection judgment process is greatly simplified, and the problem of high-efficiency and high-precision calculation of the cavity and the low-emission material is effectively solved.

The invention provides a multispectral radiation temperature measurement method and system, and belongs to the field of signal acquisition and processing in an infrared radiation temperature measurement technology. The problems of poor inversion precision and applicability of multispectral radiation temperature measurement are solved. The multispectral radiation temperature measurement method comprises the following steps of: measuring radiation information of the surface of a to-be-measured target by using a multi-wavelength pyrometer; the beam splitting system obtains radiation information of different spectrum channels; photoelectric conversion: converting the optical signal into an electric signal; constructing a target equation and a constraint optimization condition according to the brightness temperature model; carrying out multispectral data processing by utilizing an improved multi-population mixed pigeon inspired optimization algorithm; and the final real temperature and emissivity values are obtained. The device is mainly used for multispectral radiation temperature measurement.

The invention discloses a method for preparing antioxidant MXene through electrochemical stripping, and belongs to the technical field of two-dimensional nano materials. Comprising the following steps: (1) centrifuging a Ti < 3 > C < 2 > T < x > MXene dispersion liquid to obtain a MXene wet solid, and coating the MXene wet solid on two sides of a copper foil; (2) the copper foil coated with the MXene wet solid serves as a cathode, and the cathode and the anode are placed in an electrolytic tank together; and (3) applying a constant voltage for electrolysis, collecting sediments in an electrolytic tank, centrifuging, washing, carrying out suction filtration, and drying to obtain the e-MXene film. The e-MXene prepared by the invention has excellent oxidation resistance and adjustable infrared emissivity, and can adapt to infrared camouflage application under damp and hot conditions.

The invention discloses an equipment on-line temperature measurement monitoring method based on thermal imaging, and relates to the technical field of on-line temperature measurement. The method comprises the following steps: synchronously acquiring reflection spectrum data and infrared thermal radiation data of a target surface through an integrated spectrum sensing module and a thermal imaging module; inverting the initial emissivity of the target area according to the reflection spectrum data based on Kirchhoff's law and a pre-stored material feature library; dynamically correcting the initial emissivity to generate a pixel-by-pixel corrected emissivity matrix; and carrying out pixel-by-pixel temperature calculation on the thermal imaging original data, constructing an equipment surface temperature distribution model, and carrying out abnormity early warning according to a preset threshold value. According to the method, through deep fusion of spectrum sensing and thermal imaging data, pixel-by-pixel emissivity calibration of complex surface equipment is realized, and the temperature measurement precision and reliability are remarkably improved.

The utility model relates to a thermochromic intelligent dual-band infrared stealth film, and belongs to the technical field of infrared stealth films. In order to solve the problems that an existing infrared stealth material is complex in preparation process, high in cost and narrow in application range, the utility model provides a thermochromic intelligent dual-band infrared stealth film which sequentially comprises a ZnS material layer, a VO2 material layer, a Si material layer and an Ag substrate layer from top to bottom. The infrared stealth film disclosed by the utility model has the characteristic that the infrared emissivity is reduced along with the temperature rise, the emissivity of the film can be adaptively and reversibly adjusted according to the environment temperature change, the infrared stealth film has a stealth function of double infrared bands of 3-5 microns and 8-14 microns, and meanwhile, the infrared stealth film has relatively high emissivity in a non-infrared detection band of 5-8 microns, so that the infrared stealth effect is greatly improved. And the heat dissipation function of the stealth target in the wave band can be realized. The infrared stealth film disclosed by the utility model has the characteristics of simple structure and convenient preparation method, can cover the surface of a target in a large area, and is beneficial to large-scale popularization.

The invention discloses an infrared temperature measurement calibration method and device for a CMAS high-temperature corrosion thermal barrier coating. The method comprises the following steps: preparing a thermal barrier coating sample coated with CMAS and provided with holes in the side surface; placing the sample in a high-temperature furnace, and inserting a high-temperature thermocouple into the sample temperature measuring hole; adjusting the high-temperature infrared thermometer to align a temperature measuring light path of the high-temperature infrared thermometer with a to-be-measured area on the surface of the sample; heating the high-temperature furnace to a preset temperature and preserving heat; and comparing thermocouple and infrared temperature measurement data in real time, adjusting the infrared emissivity to enable the difference between the thermocouple and the infrared temperature measurement data to be within a preset error range, and determining the infrared emissivity parameter of the sample at the temperature. According to the method provided by the invention, the infrared temperature measurement parameters of the thermal barrier coating under different CMAS corrosion conditions can be accurately calibrated, so that the corresponding infrared emissivity is obtained, and a key technical support is provided for checking and evaluating the high-temperature CMAS corrosion service life of the thermal barrier coating and testing the reliability of the service life. Meanwhile, the device adopted by the invention is simple in structure, simple and convenient to operate, accurate and effective in test result and good in application value.

The invention belongs to the technical field of emissivity measurement equipment, and particularly relates to a device and a method for measuring directional emissivity of a material. The equipment comprises a heating furnace, a thermal infrared imager, a connecting mechanism, a lifting mechanism and an electric rotating arm, the heating furnace is used for heating a material sample placed in the heating furnace to a specified temperature, and the thermal infrared imager is arranged above the heating furnace and used for detecting the thermal radiation temperature of the material sample through an opening in the upper portion of the heating furnace; the thermal infrared imager is connected with the lifting mechanism through the connecting mechanism, the lifting mechanism is used for adjusting the height of the thermal infrared imager, the electric rotating arm is connected with the bottom of the lifting mechanism, and when the electric rotating arm rotates to drive the lifting mechanism, the connecting mechanism and the thermal infrared imager to rotate at the same angle, the observation angle between the thermal infrared imager and a material sample is adjusted. According to the invention, the universality and convenience of the measurement of the directional emissivity of the material can be improved.

The invention discloses a lithium battery laser welding detection method, and belongs to the technical field of nondestructive testing. The method comprises the following steps: acquiring a three-dimensional path point sequence of a to-be-detected welding seam; controlling the transient thermal excitation unit to apply transient thermal excitation along the path; a high-speed multispectral imaging unit is used for synchronously collecting the thermal radiation attenuation process of the weld joint under at least two different spectral bands, and a space-time spectrum data cube is formed; and finally, inputting the data cube into an artificial intelligence model for defect identification. The system correspondingly comprises a three-dimensional visual sensor, a transient thermal excitation unit, a high-speed multispectral imaging unit and a synchronous control and data processing unit. According to the method, different types of welding defects such as air holes and incomplete fusion can be effectively distinguished by analyzing the heat diffusion characteristic difference under different spectral bands, the interference of uneven surface emissivity is inhibited, and the online detection accuracy and reliability of the three-dimensional complex welding seam are improved.

The invention relates to an infrared reflection spectrum measuring device which is adaptive to a commercial Fourier transform infrared spectrometer and is based on materials (including solids, powder, coatings and liquid phase in-situ reaction) of a confocal off-axis ellipsoidal reflector and an off-axis parabolic reflector. The device mainly comprises a sample cell, two plane mirrors, two off-axis parabolic mirrors and an off-axis ellipsoidal mirror, wherein the two off-axis parabolic mirrors and the off-axis ellipsoidal mirror are arranged in a confocal manner. Positioning and fine adjustment are achieved through the precise sliding rail and the spiral fine adjustment device. Compared with an existing butterfly-shaped light path infrared diffuse reflection accessory, through the coplanar design of the optical axis of each reflector and the detection light beam of the infrared spectrometer, the size of the device is effectively reduced, and the device is adaptive to all commercial infrared spectrometer types. And through the confocal design of the off-axis ellipsoidal reflector and the parabolic reflector, the integral collection angle and intensity of diffuse reflection light of the sample are expanded, and the accuracy of emissivity testing by a reflectometer optical method is improved.

According to the preparation method of the radiation refrigeration colored coating with the double-layer structure, absorption of ultraviolet-visible light and near-infrared wave bands is weakened and heat input is reduced by adding a fluorescent coloring agent and designing a bottom strong reflection layer, meanwhile, high-emissivity varnish is selected as a base material, and the radiation refrigeration colored coating with the double-layer structure is prepared. The capability of emitting heat outwards in a middle and far infrared radiation form of the colored paint is improved, so that efficient cooling is realized. The prepared colored paint has rich and adjustable colors and a good cooling effect, is low in cost and simple in process, and is expected to be applied to the fields of high-power electronic equipment, building heat management and the like.

The invention relates to a black coating with adjustable infrared emissivity and a preparation method and application thereof, and belongs to the technical field of optical and infrared coatings, the black coating comprises a black filler, resin and flaky aluminum powder in a mass ratio of 1: (0.3-1.5): (0-2.2). The black coating provided by the invention is black in the visible light wave band and has high visible light absorptivity and low infrared emissivity, and the infrared wave emissivity of the coating and the temperature under infrared thermal imaging can be regulated and controlled by regulating the dosage ratio of the flaky aluminum powder to the black filler in the black coating; and the use requirements of three-dimensional visualization effects of the planar model in the visible light band and the infrared band in different regions, different seasons and different moments can be met.

The invention relates to the technical field of PDRC coatings, and discloses a novel super-hydrophobic PDRC coating with high mechanical strength. The coating can be prepared by a spraying process with large-scale production and low energy consumption. The PDRC coating is composed of poly (poly (GMA-co-FMA)) modified by a silane coupling agent (KH550) and SiO2 / TiO2 particles. By adjusting the mass ratio of SiO2 to TiO2 and the content of poly (GMA-co-FMA), the optimized PDRC coating shows the solar reflectivity of 91.06% and the emissivity of 93.72%, has the super-hydrophobicity of about 157 degrees, and effectively prevents dust attachment. In addition, the PDRC coating still keeps the reflectivity of 91.06% after 3,000 times of wear-resistant cycles of 250g load, which indicates that the PDRC coating has excellent mechanical durability. Due to the excellent optical performance, the surface temperature of the coating is reduced by about 13.2 DEG C, and the net cooling power of about 109.2 W / m is provided. The PDRC coating can be further processed into variants with different colors without influencing the high reflectivity and emissivity of the PDRC coating, so that the PDRC coating is suitable for practical application.

The invention discloses a fano resonance-based color radiation refrigeration film and a preparation method thereof, the film comprises a structure M1D1M2D1AD 'which are sequentially stacked from bottom to top, the structure of the film is an asymmetric structure, M1 represents a first metal layer, M2 represents a second metal layer, A represents an absorption layer, D1 represents a first dielectric layer, and D' represents a symmetrical dielectric layer unit of a film material; the M1D1M2 structure is in a discrete state and serves as a narrow-band light absorber, the M2D1AD'structure is in a continuous state and serves as a broadband light absorber, D 'serves as an antireflection layer in a continuous state, and the narrow-band light absorber and the broadband light absorber are coupled by sharing the second metal layer M2 to achieve fano resonance. The high-purity and color-adjustable reflection type structural color is achieved, the high reflectivity is achieved in the solar spectrum wave band, the high emissivity is achieved in the atmosphere window, and therefore the excellent radiation refrigeration effect is achieved.

The invention relates to the technical field of power equipment safety inspection. The power inspection fault diagnosis method and system based on the unmanned aerial vehicle multispectral image are provided, and the method comprises the steps: carrying out the multispectral data collection of power equipment, and obtaining a visible light image, multispectral reflectivity data and infrared thermal image data; dynamically correcting emissivity change caused by oxidation or dirt on the surface of the equipment to generate a dynamic emissivity correction coefficient table; according to the dynamic emissivity correction coefficient table, temperature calibration is carried out on the infrared thermal image data, and a calibrated temperature distribution diagram is generated; and fusing the calibrated temperature distribution diagram, the preprocessed visible light image and a multispectral reflectivity distribution diagram obtained by preprocessing the multispectral reflectivity data, performing multimodal fault diagnosis, and outputting fault types and positions, so as to solve the problems that single spectral data is easy to misjudge, emissivity static assumption errors are large, and the accuracy is high in the prior art. And the problem of insufficient confidence caused by multi-modal data splitting analysis is solved.

The invention discloses a preparation method of a colored passive radiation cooling coating, the colored passive radiation cooling coating is composed of a thermal radiation base layer and a colloid photonic crystal reflecting layer, monodisperse colloid particles are assembled on the surface of the thermal radiation base layer by means of spray coating, roll coating, brush coating or blade coating, and the colored passive radiation cooling coating is prepared. The preparation method is simple and easy to implement, high in compatibility and capable of achieving large-area construction. The prepared passive radiation cooling coating has high sunlight reflectivity and infrared thermal emissivity, shows excellent passive radiation cooling performance, and can greatly save refrigeration energy consumption. Meanwhile, the coating is stable and adjustable in appearance color, green and environment-friendly, can meet the color requirements of decoration, appreciation and the like, and has high commercial popularization value.

The invention relates to a high-temperature heating furnace temperature measurement system based on a temperature emissivity inversion algorithm, and belongs to the technical field of metallurgical industry temperature measurement. The system comprises a spectrum detection system, a master control upper computer and a temperature adjusting system, the spectrum detection system is used for acquiring a plurality of wavelengths and corresponding gray values of a melt in the heating furnace; the temperature adjusting system is used for adjusting the temperature of the heating furnace; the master control upper computer is used for receiving the wavelengths and the corresponding gray values obtained by the spectrum detection system to obtain the spectral radiation brightness corresponding to the wavelengths; obtaining the temperature of the melt in the heating furnace by using a free energy minimization temperature emissivity inversion method based on each wavelength and the corresponding spectral radiance; and the temperature adjusting system is controlled to adjust the temperature of the heating furnace based on the temperature of the melt in the heating furnace. Real-time and accurate temperature measurement of melts with different emissivity is realized, the production cost is reduced, and the temperature measurement precision is high.

The invention discloses a temperature and emissivity joint inversion method for multispectral temperature measurement, and relates to the field of non-contact temperature measurement of high-temperature targets. In order to solve the defect that in the prior art, combined inversion of the emissivity cannot be realized under the condition that the emissivity does not need to be known in advance, the technical scheme provided by the invention comprises the following steps: establishing a multispectral temperature measurement model, constructing a temperature calculation model under each channel, and outputting a plurality of sub-objective functions for optimization; constructing a weighted objective function used for optimization solution; outputting a global optimal solution as an initial point; constructing an optimization model with a penalty function, and outputting the target temperature and the spectral emissivity; and performing simulation verification based on the inversion result, performing error evaluation by setting a typical emissivity curve and a real temperature, and outputting an algorithm precision index. The method is suitable for non-contact high-precision temperature and emissivity combined measurement of a high-temperature target in a complex spectrum environment.

The invention discloses a multilayer film compatible with H, K, medium-wave infrared and long-wave infrared band stealth and radiation heat dissipation. Comprising a substrate, a metal reflection layer, a photonic crystal layer fused with a loss medium and an H and K wave band antireflection layer, the absorption rate of H and K wave bands is larger than 0.5, the emissivity of medium wave infrared and long wave infrared bands is lower than 0.5, and the emissivity of very long wave infrared bands is larger than 0.5; the photonic crystal layer fused with the loss medium is of a multi-layer structure and is formed by alternately stacking dielectric layers made of various high-refractive-index dielectric materials and dielectric layers made of various low-refractive-index dielectric materials. The multilayer film provided by the invention has effective radiation heat dissipation and heat management capabilities while realizing stealth on solar radiation and heat radiation, and can be widely applied to the fields of aviation, aerospace and the like.