184 results about "Absorptance" patented technology

The invention provides an intelligent control method for a floodlight illumination system, and the method comprises the steps: obtaining an environment surface roughness coefficient, spectral reflection distribution and spatial geometric change data, determining the wall surface material absorptivity and shielding region coordinates, and obtaining environment reflection characteristics and shielding distribution data; analyzing shielding boundary sharpness and shielding angle distribution according to the spatial geometric change and the coordinates of the shielding area, calculating a luminous flux distribution curve of a local dark area, and judging whether the influence range of the dark area exceeds a preset threshold range or not; calculating the illumination coverage integrity according to the updated light field distribution and polarization reflection characteristics, determining the boundary sharpness of a light beam, and obtaining a light field uniformity parameter; and according to the light field uniformity parameter and the shielding thermal radiation effect, calculating and optimizing light field parameters.

This disclosure relates generally to a patterning structure including an underlayer and an imaging layer, as well as methods and apparatuses thereof. In particular embodiments, the underlayer provides an increase in radiation absorptivity and / or patterning performance of the imaging layer.

The invention discloses a vegetation photosynthetically active radiation absorptivity inversion method based on multi-source data fusion. The vegetation photosynthetically active radiation absorptivity inversion method comprises the following steps: acquiring a modeling data set for inverting a photosynthetically active radiation absorptivity; a pre-trained long-short-term memory network inversion model PreTLSTM is constructed, the pre-trained long-short-term memory network inversion model PreTLSTM is obtained through training of a training set, and the training set is modeling data generated based on a soil-leaf-canopy coupling model SLC; taking the pre-trained long-short-term memory network inversion model PreTLSTM as a source model, constructing a migration training set through satellite data and measured data, training the source model by using the migration training set, and obtaining a migration training inversion model TLLSTM; and inputting the modeling data set into a migration training inversion model TLLSTM to obtain a vegetation photosynthetically active radiation absorptivity estimation result. According to the method, complex ecological and biophysical processes in the remote sensing data can be better captured.

Passive cooling article (120) includes a plurality of first elements (122) defining a high absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range and a plurality of second elements (124) defining a low absorbance in the atmospheric window wavelength range and defining high average reflectance in the solar wavelength range, wherein the plurality of first (122) and second (124) elements are interspersed to form a major structure having a first major surface (130) comprising the first element outer surfaces (126) and the second element outer surfaces (128), wherein the first element outer surfaces (126) face a first direction toward a first end region (136) of the major structure (130) and the second element outer surfaces (128) face a second direction toward a second end region (136) of the major structure. The article (120) may be applied to a substrate (104), for example, on a generally vertical surface of a vehicle or stationary structure.

The utility model discloses a range hood which comprises a centrifugal fan, the centrifugal fan comprises a volute and an impeller arranged in the volute, and the impeller comprises blades; the detection module comprises a transmitting module and a receiving module; the transmitting module is used for transmitting infrared light to the blades at the corresponding positions; the receiving module is used for receiving reflected light of the blades; and the processing assembly is electrically connected with the detection module and can judge the thickness of the oil film accumulated on the blade according to the light intensity of the receiving module. Compared with the prior art, the utility model has the advantages that the oil accumulated on the blades has large difference in absorptivity to infrared spectrums with specific wavelengths due to different thicknesses, so that the state and the thickness condition of a medium are judged by detecting the intensity of reflected light at a fixed position, and the smudginess condition of the impeller can be obtained; the detection accuracy of the pollution degree is improved, so that the oil pollution condition and the dynamic balance damage condition are accurately judged.

An apparatus includes a strength member including a core formed of a composite material and an encapsulation layer disposed around the core. A conductor layer is disposed around the strength member. A coating is disposed on the conductor layer. The coating is configured to have a solar energy absorptivity of less than 0.5 at a wavelength of less than 2.5 microns at an operating temperature in the range of 60 DEG C to 250 DEG C, and a radiation emissivity of greater than 0.5 at a wavelength in the range of 2.5 microns to 15 microns. The coating may have an erosion resistance that is at least 5% higher than that of aluminum or aluminum alloys.

The invention relates to the technical field of thermal control of spacecrafts, and particularly provides a high-thermal-stability temperature control structure of a space camera main system, which comprises a first thermal insulation layer, a second thermal insulation layer, a third thermal insulation layer and a truss, and is characterized in that the first thermal insulation layer covers the inner wall of the space camera main system and has high solar spectrum absorptivity and high infrared spectrum emissivity; the second heat insulation layer wraps the outer wall of the space camera main system and has low solar spectrum absorptivity and low infrared spectrum emissivity; a truss is further installed on the outer side of the space camera main system in the circumferential direction, a third heat insulation layer is arranged on the truss, and the third heat insulation layer has the low solar spectrum absorption rate and the high infrared spectrum emissivity. The multi-stage thermal insulation structure is utilized to improve the inhibition capability of the camera main system temperature control structure on the influence of the external thermal environment, and the influence of external heat flow change on the temperature stability of the camera main system is effectively reduced.

The invention discloses an ultra-wideband high-efficiency absorber in the technical fields of optics, material science and energy, which takes silicon dioxide (SiO2) as a substrate, and a titanium (Ti) nano rectangular body array is arranged above the substrate; a silicon nitride (Si3N4) regular hexagonal prism array is constructed on the top of the titanium layer, six cylindrical holes are etched in the midpoint of each vertex of a regular hexagon on the bottom surface of the titanium layer, and magnesium fluoride (MgF2) is filled in the cylindrical holes to form magnesium fluoride nano cylinders; a chromium (Cr) ring and a silicon nitride ring are sequentially superposed at the top end of the hexagonal prism and are tangentially matched with the hexagon on the top surface of the hexagonal prism. According to the UWB-HEA, the incident wavelength ranges from 400 nm to 4000 nm, the designed efficient absorption range (namely absorption band) of the UWB-HEA covers from near-infrared 855 nm to mid-infrared 3540 nm, about 2685 nm, the average absorption rate of 96.67% is achieved under TM waves, and the highest absorption rate is 99.66%; the average absorption rate of 96.44% is achieved under TE waves, the highest absorption rate is 99.72%, and the absorption rate is almost unrelated to polarization. In order to reduce radiation energy loss of an object, an ideal solar heat absorber needs to realize efficient light absorption in a wide wave band range.

The invention discloses an ultra-black coating with wide-angle absorption as well as a preparation method and application of the ultra-black coating, and belongs to the technical field of ultra-black coatings and preparation of the ultra-black coatings. The problem that an existing ultra-black coating cannot present extremely low scattering and high absorptivity under large-angle incident light is solved. According to the method, carbon black is used as an absorbent, a high-temperature-resistant silica sol solution is used as a binder, a stable structure is formed by adopting a one-step sintering method, and meanwhile, an ultra-black coating with a forest-shaped light trap array structure is constructed. The refractive index of the surface of the coating is obviously changed by utilizing the forest-shaped array structure on the surface of the ultra-black coating, so that the optical reflection of the surface is reduced; the surface forest-like light trap structures are closely arranged, so that light incident from each angle can be reflected back and forth in the structure, the incident light is absorbed to the greatest extent, stable high light absorption at a wide angle is realized, the reflectivity of the ultra-black coating does not change obviously along with the angle of the incident light, and the deep space detection precision of a space optical system is improved.

The invention relates to conductive paste and a preparation method thereof, a solar cell and a preparation method thereof, and a photovoltaic module. The conductive paste comprises 82%-88% of metal powder, 1%-5% of glass powder, 8%-15% of an organic carrier, 0.5%-3% of a wave-absorbing material and 0.1%-1% of a polymer pore-forming agent, and the wave-absorbing material can absorb laser and release heat. During laser-assisted sintering treatment, the wave-absorbing material can efficiently absorb laser energy and instantly release heat, so that the surrounding polymer pore-forming agent is quickly gasified. After the polymer pore-forming agent is gasified, a cavity structure is formed in the conductive slurry, a multi-reflection cavity of light is formed, laser which is subsequently transmitted in is reflected for multiple times in the cavity, a light path is prolonged, and the absorption rate of laser energy is greatly improved. Due to the high absorptivity of the laser, the laser power required by good ohmic contact is formed, the energy consumption is reduced, and the damage to the surface of the battery is reduced.

The application belongs to the field of turbine blade thermal barrier coating of an aero-engine. Specifically, it is a structure design, a preparation method and a prepared coating of a double-layer radiation-resistant thermal barrier coating with a high-reflection layer and a high-absorption layer. The coating comprises a high-absorption layer and a high-reflection layer. The high-absorption layer can absorb part of the energy of photon radiation and re-emit it into the environment, while relying on a cooling gas film to quickly remove heat. Part of the energy of the photon radiation is reflected by the high-reflection layer again to the high-absorption layer after passing through the high-absorption layer, and the process of absorption-emission-cooling gas film heat dissipation is repeated. Within a set temperature range, the absorption rate of the high-absorption layer is determined based on the temperature difference requirement between the inner and outer surfaces of the thermal barrier coating, and the high-absorption layer material is determined based on the absorption rate. The application greatly reduces the radiation heat flow penetrating the coating, avoids the direct heating of the high-temperature alloy by infrared radiation, and significantly improves the heat insulation capacity of the thermal barrier coating and the service life of the turbine blade.

Provided is a phosphor powder in which the balance of suitability, brightness, and excitation light blocking properties of a complex obtained from the phosphor powder with respect to a small-sized light-emitting device is improved. A phosphor powder containing SCASN phosphor particles, the phosphor powder having a volume-based median diameter (D50) of 0.1 [mu] m to 5.0 [mu] m (inclusive) as determined by a laser diffraction scattering method, and a peak wavelength of a fluorescence spectrum measured by a spectrophotometer when the phosphor powder is irradiated with light having a wavelength of 455 nm of 590.0 nm to 630.0 nm (inclusive), the absorption rate when the phosphor powder is irradiated with light having a wavelength of 455 nm is 80.0% or more.

The invention relates to a drop-out fuse with a sun exposure resistant coating. And a coating with low absorptivity is uniformly sprayed on the surface of the drop-out fuse. The coating of the coating comprises the following components in percentage by weight: 35% of polymer silicon resin powder, 19% of titanium dioxide, 24% of barium sulfate powder, 20% of xylene, 0.6% of flatting agent, 0.4% of defoaming agent and 1% of UV absorbent. The coating is uniformly sprayed on parts which do not influence the action and electric conduction of the fuse tube, and the sprayed area comprises an upper iron handle, an insulator, a fixed end, a lower iron handle, the fuse tube and a pull ring of the drop-out fuse. The surface of the coating has high brightness and can reflect most sunlight. The coating has good insulation characteristics and can be used in the electrical field. The coating has good weather resistance and chemical stability, and is suitable for being used in various harsh environments.

The application provides an antifouling coating material, an antifouling coating and a preparation method and application thereof. The antifouling coating prepared from the antifouling coating material provided by the application has a water contact angle of 105.8-161.5 degrees and a sliding angle of 1.5-24.1 degrees in a wavelength range of 200-2500 nm; a light absorption rate of 65.7-98.3 %; and a maximum light-heat surface temperature of 45.1-82.8 DEG C under 1 solar light intensity. Moreover, the antifouling coating has synergistic antifouling of superhydrophobic low adhesion and biological repellence, wide-spectrum high-efficiency and controllable light-heat antifouling capacity, all-weather antifouling capacity facing the air-water interface of the sea, and excellent mechanical durability and light-heat / wetting performance stability.

To provide an exterior laminate that can be used as an exterior component and is capable of sufficiently suppressing heat accumulation due to radiant heat such as sunlight. [Solution] An exterior laminate 10 is disclosed, having, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin, c) a printed layer 2, and b) a colored film layer 3 containing a polyvinyl chloride resin, wherein the printed layer 2 of c) does not contain carbon black, the solar transmittance of the printed layer 2 of c) is 70% or more, and the solar absorptance is 20% or less. Preferably, the printed layer 2 of c) contains a perylene-based colorant and / or a phthalocyanine-based colorant.

The invention discloses a Ni3Al-PPy composite wave-absorbing material as well as a preparation method and application thereof, and belongs to the technical field of electromagnetic wave-absorbing materials. The Ni3Al-PPy composite wave-absorbing material with a core-shell structure is successfully synthesized by combining a thermit reaction with a chemical oxidation polymerization method and hydrochloric acid modification. By regulating and controlling the addition amount of the pyrrole monomer in the range of 0.25-0.75 mL, the continuous regulation and control of the thickness of the PPy shell layer from 0.22 [mu] m to 0.31 [mu] m is realized. When the thickness of a PPy shell layer is 0.27 mu m and the matching thickness of the composite wave-absorbing material is 3.0 mm, the minimum reflection loss and absorptivity gt of-40.0 dB are obtained at 9.27 GHz; and when the matching thickness is 2.0 mm, the effective absorption bandwidth reaches 3.02 GHz. According to the invention, the effect of the shell layer thickness in regulating and controlling the performance of the wave-absorbing material with the core-shell structure is illustrated, and a feasible strategy is provided for designing a high-performance light-weight wave-absorbing material with adjustable electromagnetic parameters and enhanced durability.

The present invention relates to the technical field of cement preparation, and in particular to a cement raw material with high sunlight absorptivity, a preparation method and an application thereof. The invention relates to a method of preparing a cement raw material with high sunlight absorptivity, wherein Ca(OH)2 is mixed with original cement raw material, added to a mixed solution of copper nitrate and manganese nitrate to react and generate a precipitate, and the precipitate is evenly distributed on the surface of the original cement raw material. The cement raw material with high sunlight absorptivity can be prepared, and when cement clinker is produced using solar energy, the absorption of sunlight by the cement raw material can be greatly improved, thereby improving calcination efficiency and reducing energy consumption in cement production.

The phosphor plate of the present invention comprises a plate-shaped composite body including a base material and phosphors dispersed in the base material, and the absorbance at 455 nm when measuring the absorption spectrum of light with a wavelength of 300 nm to 700 nm is defined as A. 455 (%), the absorbance at 700 nm is set as A 700 (%), when the thickness of the phosphor plate is T (mm), (A 700 / A 455 ) / T satisfies 0.01~1.00.

The invention relates to a spectrum selective absorbing coating driven by anion and cation co-entropy engineering. The coating is composed of a polished stainless steel heat absorber substrate, a (HfZrTiTaMo) B absorbing layer and a Si3N4 antireflection layer. And the absorption layer is obtained by sputtering high-entropy boride targets with equal molar ratios under different parameters through radio frequency reaction magnetron sputtering. The preparation process is simple, the cost is low, the absorption rate of the prepared coating is larger than or equal to 0.91, the emissivity is smaller than or equal to 0.13 under the condition of the atmospheric quality factor AM1.5, and the coating has the good spectrum selection characteristic and has the important application value in the fields of solar photo-thermal power generation, photo-thermal sterilization, seawater desalination, water evaporation and deicing.

This invention discloses a calculation method for an optical model of a parallel slat transparent heat-insulating window, including: determining environmental parameters such as the sun's position; determining the solar radiation value and the incident angle of direct radiation; determining the maximum number of reflections and the incident light segmentation ratio; calculating the transmittance of direct-to-direct radiation from the slats; calculating the transmittance and reflectance of direct-to-scattered radiation from the slats; calculating the transmittance and reflectance of scattered-to-scattered radiation from the slats; determining the transmittance, reflectance, and absorptivity of back radiation transmission; calculating the transmittance and reflectance of direct radiation, and the transmittance and reflectance of scattered radiation from the single-pane glass; calculating the solar radiation transmission through the parallel slat transparent heat-insulating window using the net radiation method; and further fitting a simplified formula for calculating solar transmittance. This invention enables designers to perform optical calculations on parallel slat transparent heat-insulating windows and reasonably evaluate their performance and energy-saving potential.

The present invention belongs to the field of surface engineering technology, and specifically relates to an oxide-based gradient multi-phase nanocomposite coating and a preparation method thereof. The composite coating includes a Cr-Al-Si layer, a Cr-Al-Si-N layer, and an xAl2O3-yCr2O3-zSiO2-kY2O3-iEr2O3 layer arranged in sequence. The xAl2O3-yCr2O3-zSiO2-kY2O3-iEr2O3 layer is a nano multi-phase composite layer composed of Al2O3, Cr2O3, SiO2, Y2O3, and Er2O3 phases, and the molar ratio between each phase is x:y:z:k:i, where 0 < x, y, z, k, i < 0.4, and x + y + z + k + i = 1. This coating is obtained by using pulsed multi-arc ion plating and radio frequency magnetron sputtering for the corresponding coatings respectively in a vacuum environment. The coating of the present invention has the characteristics of high bonding strength, high hardness, high hydrogen resistance factor, high solar absorptance, and low solar emittance, with excellent performance, and can greatly improve the problem of performance deterioration of the base material caused by hydrogen permeation.

A method of manufacturing a lens includes: injecting a thermosetting first resin in a first mold, and curing the thermosetting first resin, to form a cover blank having cover parts; removing a part or all parts of the first mold; arranging the cover blank in a second mold; injecting a thermosetting second resin having a greater light absorptance or a greater light reflectance than the thermosetting first resin into the second mold and curing the thermosetting second resin, to form a lens blank having a light-shielding part between adjacent ones of the cover parts; taking out the lens blank from the second mold; cutting the lens blank at the light-shielding part located between the adjacent ones of the cover parts to obtain individual lenses having lateral side walls and flange parts extending outward from lower-end portions of the lateral side walls, which are both covered by the light-shielding part.

The invention discloses an electronic transformer insulation aging monitoring method and system, relates to the technical field of power equipment monitoring, and is used for effectively identifying and early warning insulation aging caused by atypical chemical products generated by an electronic transformer under high-frequency stress so as to improve the operation stability of the electronic transformer. The method comprises the steps that real-time light intensity data sent by a photoelectric sensor is received, the real-time light intensity data is an electric signal obtained by conducting photoelectric conversion on an optical signal obtained after the photoelectric sensor penetrates through insulating oil, and the optical signal is a signal emitted by an optical detection device to a channel through which the insulating oil flows; the optical signal has characteristic absorption on atypical chemical products in the insulating oil; calculating the real-time light absorptivity of the insulating oil based on the real-time light intensity data; and when the real-time light absorptivity meets a preset condition, generating an insulation aging early warning signal.

The application discloses a heat control device and method for a flexible thin film antenna in space, which is mainly used for providing heat control for large flexible antennas such as phased array radars in space. A solar shield with high infrared emissivity, low solar absorptivity and microwave permeability is arranged on the front surface of the antenna, and when the back surface of the antenna is irradiated by the sun, the solar shield can quickly dissipate heat by using the high infrared emissivity, and when the front surface of the antenna is irradiated by the sun, the solar shield can prevent the antenna from absorbing too much heat and making the temperature of the antenna too high by using the low solar absorptivity; an insulating layer and a low solar absorptivity coating are arranged on the back surface of the antenna, and when the back surface is irradiated by the sun, the low solar absorptivity coating can reflect most of the solar heat, and when the back surface is in a shadow area, the insulating layer can prevent the temperature of the antenna from being too low. Therefore, the antenna can always be in a relatively suitable temperature range in the complex and changeable space orbit thermal environment. The application has the characteristics of strong adaptability and wide applicability.

The application discloses a kind of perfect cutoff absorber of metasurface based on nano round structure, adopt nanometer cylinder and ring array grown on silicon dioxide, two groups of ring structure are respectively selected using dielectric material gallium arsenide and silicon.Optimizing structure parameter, wavelength from ultraviolet to mid-infrared, 0.913 average absorption is realized in absorption band 100-710nm, and average absorption is only 0.02 in non-absorption band 1260nm-20μm wave band.ER is 9.6dB, ED is 0.81, and CS is 0.0015nm ‑1 The perfect cutoff absorber provided by the application has exactly this spectral selectivity, which provides an effective method for designing ideal solar heat absorber, which has important application in the field of renewable energy, such as solar thermal photovoltaic and solar thermal energy application.

The invention provides a PPG multi-channel spectrum diffuse reflection food baking degree detection method, which comprises the following steps: S1, selecting a plurality of monochromatic light sources or full-wave band light sources and detectors, and arranging dodging sheets on the light sources and the detectors in a matching manner; the light source is utilized to emit light of a required wave band, and the light is scattered by the light source dodging sheet, so that the light is uniformly irradiated on a sample to be detected; s2, the light rays are emitted after passing through the sample, and judgment is carried out according to the absorptivity and the reflectivity of the light rays with different wavelengths irradiated on the sample; the reflectivity is the ratio of the intensity of light which can be reflected back when the light irradiates the sample to the irradiation intensity; s3, the reflected light is dodging again through a dodging sheet of the detector and then enters the detector; the detector detects the reflectivity of light rays with different wavelengths; real-time detection and quantitative analysis of the baking degree of the food are realized by collecting multi-channel spectral data reflected by the surface of the food and combining proper data processing and algorithms.

The invention relates to a solar photo-thermal power generation technology, in particular to a high-temperature-resistant composite heat absorption coating with spinel pigment as a light absorption agent and a preparation process of the high-temperature-resistant composite heat absorption coating, and belongs to the field of solar heat utilization. The preparation method comprises the following steps: firstly, depositing a NiCrAlY coating on a Ni-based high-temperature alloy matrix as a bonding layer through a plasma spraying technology; then, the NiCrAlY coating is coated with a CuCrMnO4 heat absorption coating through a spraying process; and finally, performing heat treatment to form the composite heat absorption coating with good binding force on the substrate. Compared with an existing conventional heat absorption coating, the heat absorption coating has the advantages of being good in process repeatability, controllable in component, easy to industrially produce and the like, and the prepared coating is compact in structure, high in stability and high in absorptivity. The bonding layer is added into a heat absorption coating system, the peeling or falling phenomenon caused by the difference of thermal expansion coefficients between the ceramic coating and the alloy can be effectively reduced, and the heat absorption coating has the long-term service performance at the high temperature.

The present invention relates to a solar absorber based on a gold nanoarray, which belongs to the field of micro-nano optoelectronic technology. The solar absorber is composed of gold nanounits periodically arranged in an XOY plane. Sunlight is incident in the form of a plane wave. Each of the gold nanounits comprises, from bottom to top, a base layer, a distributed Bragg reflector layer, a two-dimensional material layer, and an antenna layer. The distributed Bragg reflector layer includes five layers of distributed Bragg reflectors (DBRs). The projections of the base layer, distributed Bragg reflector layer, and two-dimensional material layer on the XOY plane overlap and form a square. The projection of the antenna layer on the XOY plane is a circle, and the square and circle are concentric. The solar absorber has a simple structure, an average absorptivity of 80% in the visible light range of 400nm-700nm, is unaffected by the polarization of the light source, and exhibits good absorption effect within the incident angle range of 0° to 60°.

The embodiment of the invention provides a preparation method of an ultra-black coating and the ultra-black coating. The preparation method comprises the following steps: mixing a carbon nanomaterial filler, an additive and a solvent, and carrying out ultrasonic dispersion to obtain a dispersion liquid; mixing a polymer matrix with the dispersion liquid to obtain ultra-dispersed slurry; spraying the ultra-dispersed slurry on the surface of a substrate to form a first coating, and curing the first coating to obtain a cured coating; and plasma spraying treatment is conducted on the cured coating, the ultra-black coating is obtained, the carbon nanomaterial serves as filler, the mass concentration of the carbon nanomaterial in the ultra-dispersed slurry is 2-15 mg / ml, and based on the slurry ultra-dispersed state caused by the carbon nanomaterial with the high mass concentration, the surface of the prepared ultra-black coating has a micro-nano hierarchical structure, and the ultra-black coating has the micro-nano hierarchical structure. The ultra-black coating has the advantages of excellent substrate adhesion, ultrahigh sunlight absorptivity and high and low temperature resistance, and is easy to produce on a large scale.

The application discloses a multilayer film compatible with H, K, medium-wave infrared and long-wave infrared wave band stealth and radiation heat dissipation. The multilayer film comprises a substrate, a metal reflection layer, a photonic crystal layer fusing loss medium and an H and K wave band anti-reflection layer, the absorptivity of the H and K wave band is greater than 0.5, the emissivity of the medium-wave infrared and long-wave infrared wave band is lower than 0.5, and the emissivity of the very long-wave infrared wave band is greater than 0.5; the photonic crystal layer fusing loss medium is a multilayer structure and is formed by alternately stacking medium layers of multiple high and low refractive index medium materials. The multilayer film can realize the stealth of solar radiation and thermal radiation and has effective radiation heat dissipation heat management capability at the same time, and can be widely applied to the fields of aviation, spaceflight and the like.