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322 results about "Material Absorption" patented technology

Acoustic absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy.

Method and apparatus for determining absorption of electromagnetic radiation by a material

A method of determining a portion of light at a given wavelength which is incident on a material that is absorbed by the material, the method comprising: transmitting a pulse of light at the given wavelength so that the pulse traverses a path through the material; generating a first signal responsive to light in the light pulse that traverses the path length without being absorbed by the material; generating a second signal responsive to energy that the material emits responsive to a portion of the light from the light pulse that is absorbed by the material as the light pulse traverses the path; and using the first and second signals to determine the absorbed portion.
Owner:GLUCON

Electrochromic color display having different electrochromic materials

An electrochromic display comprises electrochrome pixels (10) which comprise at least a first electrochrome material (EL1) and a second electrochrome material (EL2) between two electrodes (E1, E2). Each of the electrochrome materials (EL1, EL2) has two stable states, in one state at a first voltage across the electrochrome pixel (10) the material is transparent, in the other state at a second voltage across the electrochrome pixel (10) the material absorbs a color and thus is colored. The material changes from the one state to the other state by applying the appropriate one of the first or the second voltage. The amount of change of the absorption of the color depends on the time the appropriate voltage is applied. The first electrochrome material (EL1) changes from a transparent state to a color absorbing state for at least partly absorbing a first color when a pixel voltage (VP) across the electrochrome pixel has the first value (V1). The first electrochrome material (EL1) changes from the color absorbing state to the transparent state when the pixel voltage (VP) has a second value (V2) which has a polarity opposite to the first value (V1). The second electrochrome material (EL2) changes from a transparent state to a color absorbing state for at least partly absorbing a second color different than the first color when the pixel voltage (VP) has a third value (V3) which has an absolute value smaller than an absolute value of the first value (V1). The second electro-chrome material (EL2) changes from the color absorbing state to the transparent state when the pixel voltage (VP) has a fourth value (V4) which has a polarity opposite to the third value (V3). An absolute value of the fourth value (V4) is smaller than an absolute value of the second value (V2).
Owner:KONINKLIJKE PHILIPS ELECTRONICS NV

Array of geiger-mode avalanche photodiodes for detecting infrared radiation

An array of Geiger-mode avalanche photodiodes is formed in a die and includes: an internal dielectric structure, arranged on the die; and an external dielectric region arranged on the internal dielectric structure. The external dielectric region is formed by an external material that absorbs radiation having a wavelength that falls in a stop-band with low wavelength and transmits radiation having a wavelength that falls in a pass-band with high wavelength, at least part of the pass-band including wavelengths in the infrared. The internal dielectric structure is formed by one or more internal materials that substantially transmit radiation having a wavelength that falls in the stop-band and in the pass-band and have refractive indices that fall in an interval having an amplitude of 0.4. In the stop-band and in the pass-band the external dielectric region has a refractive index with the real part that falls in the above interval.
Owner:STMICROELECTRONICS SRL

Broadband terahertz metamaterial absorber based on L-shaped structures

ActiveCN104360424AGraphical structure is simpleEasy to integrateOptical elementsSilicon dioxideMetal thin film
The invention discloses a broadband terahertz metamaterial absorber based on L-shaped structures and belongs to the technical field of metamaterials and electromagnetic function materials. The broadband terahertz metamaterial absorber comprises a metal reflection layer, a dielectric layer and a metal pattern layer, the metal reflection layer is a continuous metal thin film, thickness of the metal reflection layer is larger than skin depth of working terahertz wave, the dielectric layer is positioned between the metal reflection layer and the metal pattern layer and is a silicon dioxide thin film, the metal pattern layer is formed by periodically arranging the L-shaped unit metamaterial structures, and each L-shaped unit metamaterial structure is formed by connecting a horizontal arm and a vertical arm which are perpendicular to each other. By reasonably designing geometric size and lattice period of the L-shaped structures and thickness of the dielectric layer in the middle, the characteristic that electromagnetic waves vertically coming to the surface of a metamaterial are absorbed completely can be realized. The broadband terahertz metamaterial absorber is simple in graph pattern and needless of stacking of multiple layers of materials, has characteristics of wide frequency band and high absorptivity and can be used for an electromagnetic wave collecting and detecting device.
Owner:BEIJING UNIV OF TECH +1

Feeding device of flexible printed circuit (FPC) board and keyboard base plate automated assembly system

The invention discloses a feeding device of a flexible printed circuit (FPC) board and a keyboard base plate automated assembly system. The feeding device of the FPC board comprises a lifting material platform, a lengthways material moving mechanism and a material absorption frame which is connected with a sliding table, wherein a material box which is used for arranging the FPC board in a stack mode, the lengthways material moving mechanism comprises a lengthways slide and the sliding table which is in sliding connection with the slide, and the material absorption frame is arranged above the lifting material platform. By the adoption of the lifting material platform, the fact that the FPC board with multiple layers automatically feed the material to the position is achieved, only the whole box is needed to be changed, in the process of a robot continue assembling, the change of the material box of the FPC board has no need to be operated in a machine stopped state, reloading time is saved, and the production efficiency is improved. The keyboard under plate automated assembly system achieves assembling of each element by the adoption of the robot, the quantity of automatic control unit is reduced, and the floor area of the whole automated assembly system is benefitted to be reduced.
Owner:SHENZHEN RAPOO TECH

Bi-color antibacterial EVA footwear and preparation method thereof

The invention relates to organic polymer compound technical field, and provides a bi-color antibacterial EVA footwear and a preparation method thereof, two different colors of antibacterial EVA material grains are prepared from raw material EVA, ethylene-butene copolymer, 1, 2-polybutadiene, an antibacterial agent, chlorinated polyethylene, a foaming agent, a crosslinking agent, zinc stearate, stearic acid, a wear-resisting agent, talcum powder and a pigment by smelting, open milling and granulation, two different colors of antibacterial EVA material grains are respectively pouring into different material absorption barrels of an EVA injection machine table for once ejection to obtain the bi-color antibacterial EVA footwear, the echerichia coli and staphylococcus aureus antibacterial rates of the bi-color antibacterial EVA footwear are more than 99%, the bi-color antibacterial EVA footwear has good water-proof weather-proof lasting antibacterial properties, has the characteristics of light weight, good comprehensive performance, high production efficiency, high product qualified rate and the like, and is especially suitable for production of sandals, slippers, indoor shoes and other EVA shoes which are in direct contact with human skin, and is lightweight and comfortable, and cost-effective.
Owner:茂泰(福建)新材料科技有限公司

Automatic fetching device of injection molding machine

The invention relates to an automatic fetching device of an injection molding machine, which comprises an injection molding machine frame, wherein the machine frame is provided with an injection device; a fixed die plate on the machine frame is connected with a movable die plate and a back die plate through guide posts; the fixed die plate and the movable die plate are respectively provided with an injection die; a die cavity is arranged in the injection die; a fetching plate is arranged in the machine frame; a material absorption device and a push-out device are arranged in the fetching plate; the fetching plate is driven by an elevating gear; and the elevating gear is installed on a steady rest. The invention is characterized in that the elevating gear comprises a fixed rack arranged inthe fixed rack and an elevating guide rail, the fetching plate is connected with the elevating guide rail, one side of the fetching plate is provided with a movable rack, and the movable rack and thefixed rack mesh with the elevating gear driven by power. In the scheme of the invention, the elevation of the fetching plate is controlled by a multiple-path mechanism, which is formed by that the movable rack and the fixed rack mesh with the elevating gear, and the stroke of the fetching plate can be multiplied by twice or more than twice; and thus, the invention reduces the occupation space, decreases the height of the machine frame, has a high elevation speed, shortens the time and enhances the work efficiency.
Owner:蔡业

Intelligent vibration absorption device combining passive damping with active damping

InactiveCN102705433ASave energyMake up for the shortcomings of easy damageNon-rotating vibration suppressionElectricityReal-time Control System
The invention relates to a preparation method of an intelligent vibration absorption device combining passive damping with active damping. In the preparation method, part of mechanical energy is absorbed by utilizing a damping material in the passive damping; an active damping intelligent structure which is based on a piezoelectric effect and consists of a sensor, a driver, a collection card, a controller, a driving power supply and a real-time control system is utilized in the active damping; the effective control on vibration is realized, wherein the sensor and the driver are adhered onto the surface of a passive damping material and are connected with the controller; the sensor is connected with the collection card; the driver is connected with the driving power supply; and the collection card, the driving power supply and the controller are connected with the real-time control system. The device comprises the following preparation steps of: preparing in a prior period, manufacturing a molded passive damping material, adhering and constructing the active damping intelligent structure, and adhering the side of the passive damping material, which is not adhered to a piezoelectric ceramic, to a position which needs vibration absorption. By using the intelligent vibration absorption device, the intelligent control on the vibration generated when various machines run can be realized, and the vibration absorption effect is enhanced.
Owner:WUHAN UNIV OF TECH

High heat-conducting wave-absorbing heat-dissipation composite material

InactiveCN104559131AImprove heat transfer and cooling effectImprove absorption rateAbsorption ratioHeat conducting
The invention discloses a high heat-conducting wave-absorbing heat-dissipation composite material. The composite material is prepared by using 5-15 parts by weight of organic resin, 10-30 parts by weight of heat conducting agent, 50-70 parts by weight of magnetic powder, 1-10 parts by weight of 60-90% ethanol, 1-5 parts by weight of water and 1-5 parts by weight of dispersing agent. The heat conducting agent having excellent heat transferring property is compounded with the organic resin, and therefore the heat transferring and heat dissipation properties of the matrix material of the composite material are improved; the wave absorbing property of the system is improved due to the use of the ferrite wave absorbing material having the characteristics of high absorbed frequency, high absorptivity, thin matching thickness and the like; and the high heat-conducting, wave-absorbing heat-dissipation composite material disclosed by the invention has high absorptivity to electromagnetic wave in wider frequency bands, and has the properties of light weight, temperature resistance, moisture resistance, corrosion resistance as well as good heat conducting property.
Owner:HUIZHOU KINGBALI TECH
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