94 results about "Infrared reflectance" patented technology

The invention relates to the technical field of machine learning, in particular to a grain classification and recognition method and system based on image analysis, and the method comprises the following steps: obtaining grain particle image data, calculating a gray histogram and a gradient change rate, calling a gray co-occurrence matrix to extract grain particle texture density, and scanning a sliding window to obtain local feature parameters of grain particles. According to the method, through combined analysis of a gray level histogram and a gradient change rate, dynamic extraction of particle textures through a sliding window, enhancement of complex surface feature capture, normalization of contrast and direction consistency parameters, construction of weighted feature vectors, dynamic correction of variance contribution degree and suppression of environmental interference, and fusion of near-infrared and short-wave infrared reflectivity changes, the near-infrared and short-wave infrared reflectance change is improved. And quantifying the mean value and peak-to-valley ratio of spectrum difference values, matching visible light characteristics to verify multi-dimensional constraints, constructing a spectrum-texture matrix by local reflectivity rate and gradient change rate, and synchronously evaluating global similarity and spatial distribution difference by adopting Euclidean distance and local offset double-layer matching.

Dynamic windows with adjustable tint give users greater control over flow of light and heat. Reversible metal electrodeposition dynamic windows include (i) a transparent or translucent conductive electrode; (ii) an electrolyte solution in contact with the electrode, the electrolyte solution comprising metal cations that are reversibly electrodeposited onto the transparent electrode upon application of a cathodic potential; and (iii) a counter electrode. The electrolyte solution advantageously includes a small amount of an additive (e.g., an inhibitor, an accelerator, a leveler, or an organic or inorganic molecule that similarly serves to enhance the surface morphology of the metal cations during reversible metal electrodeposition onto the transparent electrode). Such enhancement of surface morphology during the reversible electrodeposition of the metal tinting layer over the electrode enhances one or more of color neutrality, transmittance characteristics of visible wavelengths (e.g., ability to achieve a near 0% transmission privacy state), infrared reflectance, or switching speed.

The invention discloses a radiation refrigeration thermal insulation coating, which comprises a primer and a finish, the primer comprises deionized water, a pH regulator, a defoamer, hydroxypropyl methyl cellulose, a wetting agent, a dispersant, a waterborne polyurethane emulsion, aerogel, hollow glass beads, sepiolite and a film forming aid; the finish paint is prepared from deionized water, a PH regulator, a defoaming agent, hydroxypropyl methyl cellulose, a dispersing agent, silicon oxide, zirconium oxide, rutile type titanium dioxide, infrared reflection filler, a coalescing agent, a defoaming agent, far infrared ceramic powder, potassium silicate, silica sol, titanium sol, silane modified acrylic emulsion and conductive mica powder. The coating has the advantages of excellent sunlight reflectivity and infrared emissivity, low heat conductivity coefficient, excellent high temperature resistance, excellent flame retardance and excellent stain resistance.

A safety helmet includes a shell configured to surround a user's head, and an infrared-reflective layer disposed inside the shell. The infrared-reflective layer is configured to reflect at least a portion of incident infrared radiation that passes through the shell. The infrared-reflective layer has an infrared reflectance of at least 40%. The safety helmet can further have an evaporative cooling pad positioned within a cavity defined by an inner surface of the shell. A method of manufacturing a safety helmet is also disclosed.

A high infrared reflectance Cu-TiO2 composite coating and its preparation method are disclosed. The method involves mechanically ball-milling Cu powder and TiO2 powder, wherein the TiO2 mass percentage is 10%–20%. The mixed powder is then deposited onto the substrate surface using cold spraying, preferably with a Ti buffer layer. This invention utilizes the dispersion strengthening, optical synergistic enhancement, and chemical barrier effect of TiO2 particles in the Cu matrix to improve the coating's hardness and wear resistance while simultaneously increasing infrared reflectance. Experiments show that when Cu:TiO2 = 85:15, the coating achieves an absolute infrared reflectance of 94.02% in the 1900–2300 nm wavelength band, higher than pure Cu coatings and existing cold-sprayed Ag and Al coatings. Furthermore, the coating is dense and oxidation-free. This invention features a simple process and low cost, making it suitable for applications such as solar collectors, infrared reflectors, and optical devices.

A heat protection kit for a welding helmet (10A) having a helmet body (12) and a welding filter (20) connected to a front portion (13) of the helmet body is disclosed. The heat protection kit includes a kit visor (22) configured to at least partly cover the welding filter. The kit visor has a high luminous transmittance and a high infrared reflectance. The heat protection kit further includes a mounting member configured to mount the kit visor to the helmet body. Upon mounting of the kit visor to the helmet body via the mounting member, the kit visor at least partly covers the welding filter. A welding helmet assembly including the heat protection kit is also disclosed.

The invention belongs to the technical field of building coatings, and particularly relates to reflective heat-insulation sand wall paint as well as a preparation method and application thereof. According to the reflective heat-insulation sand wall paint provided by the invention, the modified silica sol is introduced into the composite emulsion and the reflective heat-insulation sintered color sand, and the ratio of the modified silica sol to other components is regulated and controlled, so that the stability of the modified composite emulsion and the color stability and pigment adhesion of the reflective heat-insulation sintered color sand can be obviously improved. Through the synergistic effect of the components, a coating formed by coating the reflective heat-insulation sand wall paint on the surface of a building has high ultraviolet light absorption ratio and near-infrared reflectance ratio, good reflective heat-insulation performance, excellent weather resistance and stain resistance and more durable reflective heat-insulation effect.

A reflective polarizer has substantially distinct blue, green and red-infrared reflection bands for substantially normally incident light. A display system includes a display panel including blue, green and red light emitting pixels having respective blue, green and red peak wavelengths and respective blue, green and red FWHMs; and the reflective polarizer disposed on the light emitting pixels. The reflective polarizer: reflects at least about 60% of the incident light for each of the blue and green peak wavelengths and at least about 40% of the incident light for the red peak wavelength for a first polarization state; transmits at least about 60% of the incident light for each of the blue, green and red peak wavelengths for an orthogonal second polarization state; and has an absorption peak at a wavelength between the green and red FWHMs.

To evaluate the functionality of closed conduit drainage water in a farm field using a simplified configuration.SOLUTION: An information processing device (1) comprises an acquisition unit (111) that acquires the red reflectance and near-infrared reflectance of a farm field, a first calculation unit (112) that calculates a value of a dryness index indicating the degree of dryness of the farm field by referring to the red reflectance and near-infrared reflectance, and a second calculation unit (113) that calculates a value of an index indicating the drainage function of the closed conduit by referring to the value of the dryness index calculated by the first calculation unit, the value of the dryness index when the farm field is in a wet state, and the value of the dryness index when the farm field is in a dry state.SELECTED DRAWING: Figure 1

The invention provides a reflector with an infrared absorption coating film and a laser maintenance plasma light source, the reflector with the infrared absorption coating film is applied to the laser maintenance plasma light source, a reflecting surface used for reflecting light is formed on the inner surface of the reflector, and the reflecting surface is a curved surface. The reflecting surface is provided with a first film coating area and a second film coating area, the first film coating area is provided with an infrared reflecting film, and the infrared reflecting film can reflect infrared light and is used for converging pumping laser to plasma of the laser maintaining plasma light source. The second coating area is provided with an infrared absorption film, and the infrared absorption film can absorb infrared light and is used for reducing or preventing pump laser from being reflected back to a laser of the laser maintaining plasma light source. The infrared reflecting film and the infrared absorbing film can reflect visible light and / or ultraviolet light and are used for collecting at least part of wide-spectrum light emitted by plasma.

The application provides a reflective heat-insulating and heat-preserving aerogel thermal insulation finish paint, which comprises the following components: modified acrylic resin, organic silicon-coated titanium white powder, organic silicon-coated heavy calcium powder, near-infrared reflective heat-insulating titanium white powder, silica aerogel paste, additives and deionized water; wherein the modified acrylic resin is obtained by reaction of benzyl acrylate emulsion, light reflection polymer, organic silicon hydrophobic additive and ultraviolet absorber; and the light reflection polymer is titanium dioxide grafted acrylic acid. The application solves the problems of the lack of heat-preserving performance, the general weather resistance and the poor stain resistance of the existing products, and truly achieves the comprehensive protection function of reflective heat insulation, heat preservation, weather resistance and stain resistance, and has a good application prospect.

The embodiment of the invention relates to the technical field of textile, and discloses a dark color cooling nylon fabric which comprises a nylon fabric base cloth layer, a near-infrared reflecting layer and an infrared perspective color layer, the infrared perspective color layer, the near-infrared reflecting layer and the nylon fabric base cloth layer are sequentially overlapped, and the infrared perspective color layer comprises mixed pigment and soft transparent resin. When sunlight directly irradiates the surface of the fabric, the fabric can present a specific color, the sunlight can penetrate through the infrared perspective color layer to reach the near-infrared reflection layer, and then near-infrared light in the sunlight is reflected through the reflection effect of the near-infrared reflection layer, so that the temperature rise caused by the fact that the fabric absorbs near-infrared radiation is avoided. Therefore, compared with the existing fabric, the fabric provided by the invention has the advantages that by adopting the combination of the infrared perspective color layer and the near-infrared reflection function substrate material, the fabric not only has visible light selective absorption to present a specific color, but also has a relatively high near-infrared reflection ratio, and can achieve the functions of efficient heat insulation and cooling.

The application discloses a multi-modal human body recognition system and method based on photoelectric super surface and radar fusion, and belongs to the field of optoelectronics and radar sensing technology. The system realizes optical edge enhancement through a phase programmable super surface, combines continuous wave radar and frequency modulated continuous wave laser radar to obtain micro-Doppler spectrum and three-dimensional point cloud, and simultaneously collects near-infrared reflectance spectrum. On the algorithm, a cross-modal Transformer-GAT architecture is adopted to fuse multi-source features, an adaptive kernel function is used to optimize edge extraction, and a Mach-Zehnder interferometer or a ReRAM chip is used to realize low-power edge reasoning. Experiments show that the recognition accuracy of the application in complex scenes such as multi-target occlusion and low light is significantly better than that of a single modal scheme, and the application has edge deployment capability of ≤25ms delay and ≤4W power consumption, thereby providing an efficient solution for multi-scene human body dynamic recognition and health monitoring.

The present application provides a cable, a cable processing method and a cable system. The cable comprises cable cores and a cable protection layer provided on the outer layers of the cable cores; in the radial direction of the cable cores, the cable protection layer comprises an inner protection layer, a heating assembly and an outer protection layer which are successively arranged, the inner protection layer being closer to the cable cores than the outer protection layer; the inner protection layer comprises a metal sheath layer, the metal sheath layer comprising an infrared reflective metal layer, and the infrared reflective metal layer wrapping the periphery of the cable cores; the heating assembly comprises, in communication connection to each other, temperature measuring members and heating members, the temperature measuring members and the heating members being arranged at intervals in the circumferential direction of the cable cores. The present application has the beneficial effect of ensuring the normal operation of cables in extremely cold weather.

The application discloses a gallium nitride material epitaxial structure for in-situ infrared spectrum test under electric field and a test method thereof, and belongs to the technical field of semiconductors. The gallium nitride material epitaxial structure comprises a substrate, a stress control layer, an n-type gallium nitride layer and a p-type gallium nitride layer, wherein the p-type gallium nitride layer is an alternatingly-doped superlattice p-type gallium nitride or a gradually-doped p-type gallium nitride; a test electrode with an inner circle-outer ring metal pattern is arranged on the surface of the gallium nitride material epitaxial structure, and the inner circle electrode and the outer ring electrode form ohmic contacts with the p-type gallium nitride layer and the n-type gallium nitride respectively. The gallium nitride material epitaxial structure breaks through the limitation of the p-type gallium nitride layer bearing voltage in the traditional epitaxial structure, overcomes the blocking effect of the traditional metal electrode on infrared light, and is designed by modifying the sample seat of an infrared reflectance spectrometer, so that the infrared reflectance spectrometer can truly have the ability of testing the infrared spectrum of the p-type gallium nitride under in-situ electric field while applying pressure to the sample, and technical support is provided for the dynamic evolution research of material defects.

A safety helmet includes an outer shell configured for surrounding a head of a user, and an infrared reflective layer disposed in an interior of the outer shell. The infrared reflective layer is configured for reflecting at a least a portion of incident infrared radiation transmitted through the outer shell. The infrared reflective layer has infrared reflectivity of at least 40%. A method of manufacturing a safety helmet with an infrared reflective layer is also disclosed. The method may further produce a safety helmet having an evaporative cooling pad positioned within a cavity defined by the inner surface of the outer shell.

The invention relates to a semiconductor wafer, a method of processing a semiconductor wafer, and a semiconductor chip. A semiconductor chip according to an embodiment includes: a substrate including a chip region and a residual scribe surrounding the chip region; and an infrared mark disposed in the chip area or in the residual scribe line. The infrared marker includes a plurality of optical patterns. The plurality of optical patterns includes integrated circuit structures having different stack structures over the substrate, and the plurality of optical patterns have different infrared reflection characteristics.

The invention relates to the technical field of pigments, and particularly discloses a near-infrared high-reflection black coating based on perovskite type metal composite oxide and a preparation method. The near-infrared high-reflection black coating comprises a coating component and a functional pigment and filler component, wherein the weight ratio of the coating component to the functional pigment and filler component is (50-90): (10-50); the coating component comprises the following components in parts by weight: 50-90 parts of coating resin, 0.1-0.5 part of a flatting agent, 0.1-2 parts of an anti-settling agent and 30-70 parts of a diluent; the functional pigment and filler component comprises perovskite type metal composite oxide. According to the application, the near-infrared reflectivity of the black perovskite-based coating can be improved, and the cost can be reduced.

The invention provides weather-resistant optical functional coating nanoparticles as well as a preparation method and application thereof, and belongs to the field of coatings. The nano particle comprises an inner core and an outer core, wherein the inner core is made of a near-infrared reflecting material; the near-infrared reflection material adopts metal oxide nanoparticles with a near-infrared reflection function; the first wrapping layer is a silicon dioxide middle layer and wraps the inner core; and the second wrapping layer is an aluminum oxide passivation layer and wraps the silicon dioxide intermediate layer. And the nano particles are used as functional filler of the weather-resistant optical functional coating. According to the core-shell structured nanoparticles provided by the invention, the specific passivation layer is introduced, so that the near-infrared reflection function of the core material is retained, and the photocatalytic damage of the core material to an organic matrix is fundamentally eliminated, thereby obtaining the coating with long-acting stability, high visible light transmittance, excellent spectral selectivity and weather resistance.

The application provides a kind of weather-resistant optical functional coating nanoparticles and its preparation method and application, belong to the field of coating.The nanoparticles include: inner core, the inner core is near-infrared reflective material;The near-infrared reflective material uses metal oxide nanoparticles with near-infrared reflective function;First wrapping layer, the first wrapping layer is silica intermediate layer, which wraps the inner core;Second wrapping layer, the second wrapping layer is alumina passivation layer, which wraps the silica intermediate layer.The nanoparticles are used as the functional filler of weather-resistant optical functional coating.The application provides a kind of core-shell structure nanoparticles, by introducing specific passivation layer, while retaining the near-infrared reflective function of inner core material, fundamentally eliminate its photo-catalytic damage to organic matrix, so as to obtain long-acting stability, high visible light transmittance, excellent spectral selectivity and weather-resistant coating.

In an embodiment, an object identification and detection system include an infrared reflectance assembly. The object identification and detection system include one or more infrared light sources and one or more sensors. The light is reflected from the object, and the one or more sensors detect light indicative of the reflected light and generate sensor data. A control system, coupled to the infrared reflectance assembly controls the one or more infrared light sources to illuminate a one transparent object. The control system also receives the sensor data from the one or more sensors and determines a characteristic of the object based on the sensor data. Further, the control system transmits a signal to activate a special effect based on the characteristic.

The invention discloses a wide-temperature-range intelligent thermal control device and a preparation method thereof, and belongs to the technical field of passive radiation thermal management. The invention aims to solve the problems that the wide temperature range applicability of the intelligent thermal control device is limited, the adaptation between film layers of the intelligent thermal control device is weakened and the service performance of the intelligent thermal control device is degraded under a specific working condition due to softening, shrinkage and expansion of a metal layer and the like. The wide-temperature-range intelligent thermal control device is composed of a substrate, an infrared reflector layer, a dielectric layer and a phase change layer. The infrared reflector layer, the dielectric layer and the phase change layer are sequentially arranged on the substrate to form a Fabry-Perot cavity structure; the infrared reflecting mirror layer is made of TiN; the dielectric layer is made of BaF2, CsI, HfO2, ZnO, ZnS or ZnSe; and the phase change layer is a W-doped VO2 thin film. The emissivity change value of the wide-temperature-range intelligent thermal control device is 0.52, and the performance is not attenuated after a high and low temperature stability test.

This wiring sheet (100) comprises a wiring body (2) provided with electrically conductive linear bodies (21), and a pair of electrodes (4) that are in direct contact with the electrically conductive linear bodies (21), wherein the electrically conductive linear bodies (21) have an infrared reflectance of 0% to 90% inclusive at a wavelength of 1000 nm, and have a rate of change in resistance value of 50% or less after being allowed to stand for 1000 hours in a hot, humid environment at a temperature of 85°C and a relative humidity of 85% RH.

This invention discloses a hyperspectral biomimetic thin film material simulating green vegetation leaves and its preparation method, comprising the following components: water, a hydrophilic polymer, a high near-infrared reflectance pigment, a hygroscopic material, an inorganic hydrated salt, superabsorbent fibers, and an organosilicon modifier. The biomimetic thin film material provided by this invention not only possesses spectral characteristics highly similar to green vegetation but also exhibits excellent conventional properties, including water resistance, air permeability, wide applicability, and long service life. In its preparation, this invention involves simple casting and curing to form a film, which, after drying, yields coating materials of various shapes and thicknesses.

The application discloses a kind of pharmaceutical excipients near-infrared spectrum quality detection methods, it is related to drug detection technical field, comprising the following steps: obtaining the near-infrared reflectance spectrum curve of main component sample and the near-infrared reflectance spectrum curve of impurity-containing sample, the near-infrared reflectance spectrum curve of main component sample and the near-infrared reflectance spectrum curve of impurity-containing sample are normalized;Respectively perform first derivative transformation to the normalized near-infrared reflectance spectrum curve, extract the derivative value direction of each wavelength point, and construct derivative sign consistency matrix.The present application extracts spectral overlap characteristics through derivative sign consistency matrix and energy coverage ratio, constructs overlap degree index to realize interference risk assessment, and dynamically reduces weight high overlap spectrum band through weighted modeling, improves model anti-interference ability and detection sensitivity, effectively prevents impurity misjudgment, enhances quality control and safety early warning performance.

The application relates to the technical field of optical structure, in particular to a multilayer film structure for building glass radiation refrigeration. 6 / HfO2 / glass / HfO2 / (SiO2 / X / HfO2) 6 The ternary film layer structure is characterized in that (HfO2 / X / SiO2) 66 / HfO2 is a reflective ultraviolet ternary DBR, denoted as A structure, HfO2 / (SiO2 / X / HfO2) 6 The structure is a reflective near-infrared ternary DBR, denoted as B structure. The ultraviolet reflectance of the film system structure is 52.43%, the visible light transmittance is 76.22%, the near-infrared reflectance is 58.82%, and the surface emissivity is 83.38%, so that the performance is better, the radiation refrigeration effect can be achieved, and the film system structure can be applied to building glass.

The invention relates to the technical field of color sorter image recognition, in particular to a dynamic background compensation color sorter image recognition method, which comprises the following steps of dynamic background modeling and online updating, robust foreground segmentation and target extraction, illumination invariance and multi-dimensional feature extraction, adaptive threshold classification and decision making and sorting instruction execution. Through a dynamic background model and an online updating mechanism thereof, the method can automatically adapt to the fluctuation of workshop illumination and the slow aging of a background plate, and reduces the false detection and omission ratio caused by environmental changes to the minimum. A multi-dimensional discrimination system is formed by fusing hue / saturation characteristics insensitive to illumination, texture characteristics representing a surface structure and near-infrared characteristics reflecting substance components, and for substances with similar gray values, the surface texture and near-infrared reflection characteristics have significant differences, so that the substances can be effectively recognized and eliminated.

The invention discloses a near infrared spectrum quality detection method for pharmaceutical excipients, which relates to the technical field of drug detection and comprises the following steps: acquiring a near infrared reflection spectrum curve of a principal component sample and a near infrared reflection spectrum curve of an impurity-containing sample; normalizing the near-infrared reflection spectrum curve of the principal component sample and the near-infrared reflection spectrum curve of the impurity-containing sample; performing first-order derivative transformation on the normalized near-infrared reflection spectrum curve, extracting the derivative value direction of each wavelength point, and constructing a derivative symbol consistency matrix; according to the method, the spectrum overlapping characteristics are extracted through the derivative symbol consistency matrix and the energy coverage ratio, the overlapping degree index is constructed to achieve interference risk assessment, the weight of the overlapped spectrum is reduced dynamically through weighted modeling, the anti-interference capacity and detection sensitivity of the model are improved, impurity misjudgment is effectively prevented, and quality control and safety early warning performance is enhanced.

The application belongs to the field of rare earth secondary resource recycling, and particularly relates to a rare earth near-infrared reflective ceramic material, a preparation method and application thereof. The rare earth near-infrared reflective ceramic material comprises 0-1 parts of rare earth polishing powder waste, 0-1 parts of fluorescent powder waste and 0-0.3 parts of permanent magnet waste. The application can realize effective comprehensive utilization of rare earth secondary resources, and obtain a cold pigment with high near-infrared reflectivity and bright color.

The invention relates to the technical field of coated glass, in particular to self-cleaning low-emissivity hollow coated glass and a preparation process thereof. The invention relates to a preparation process of self-cleaning low-emissivity hollow coated glass. The preparation process comprises the following steps: preparing single-layer coated glass; preparing double-layer coated glass; preparing three layers of coated glass; preparing modified sericite powder and modified talcum powder; and preparing the hollow coated glass. The preparation method comprises the following steps: firstly dissolving tin tetrachloride pentahydrate, then adding molybdenum hexacarbonyl and neodymium chloride hexahydrate, fully stirring and dissolving to prepare precursor sol, then uniformly coating the precursor sol on the surface of a yttrium-doped zinc oxide coating of single-layer coated glass, and calcining to form a neodymium-molybdenum co-doped tin dioxide coating, so that the carrier concentration and mobility can be improved; and an infrared light absorption path is destroyed, and energy loss is reduced, so that the infrared reflection effect is further enhanced, and the radiance of the hollow coated glass is reduced.