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925results about How to "Evenly distributed" patented technology

Method and apparatus to reduce variation of excess fiber length in buffer tubes of fiber optic cables

The present invention provides a method for reducing and/or controlling the variations of excess fiber length along the length of reeled fiber optic buffer tubes during the manufacture of the buffer tubes. The present invention varies any number, or combination, of parameters during the manufacture of buffer tubes to achieve a substantially uniform excess fiber length along a reeled buffer tube. One embodiment of the inventive method uses monotonically decaying draw or take-up tension of the buffer tubes during winding, combined with a stiffness-compliant pad placed on the reel core to aid in providing a substantially uniform excess fiber length in the tube, while another embodiment uses a monotonically increasing angular speed of the reel in combination with the stiffness-compliant pad on the reel core. In yet another embodiment a pad is placed either periodically or continuously in the windings of the buffer tube to provide an absorbing layer for the residual stresses existing in the buffer tube as it is reeled and after the reeling is complete, combined with re-reeling the buffer tube onto a second reel after the buffer tube has cooled (after manufacture), where the pad is removed during the re-reeling process. Additionally, the present invention can have the layers of buffer tube separated with rigid, cylindrical panels separating the layers. The present inventive method also combines any, or all, of the above steps to aid in achieving a substantially uniform excess fiber length along the length of the reeled buffer tube.
Owner:ALCATEL LUCENT SAS

Preparation and application of perovskite nanowires, photoelectric detector and solar cell

The present invention discloses preparation and application of perovskite nanowires, a photoelectric detector and a solar cell. A preparation method of the perovskite nanowires comprises: (1) dissolving iodinated methylamine and haloid of lead in dimethyl formamide solution to prepare lead-halide perovskite precursor solution; (2) carrying out ultraviolet and ozone treatment on a substrate for at least 30 minutes to obtain the substrate with hydrophilcity; (3) roughening the edge of one end of the substrate and dispensing or spraying the lead-halide perovskite precursor solution on the substrate; and then jacking up the roughened edge end to enable an included angle to be formed between the substrate and the horizontal plane, carrying out standing and heating the substrate to obtain the lead-halide perovskite nanowires. According to the present invention, the lead-halide perovskite nanowires which are uniform in density and are ordered in direction can grow in a selective region of the substrate; and moreover, the grown lead-halide perovskite can be well combined with other parts or preparation methods of existing devices (for example, the lead-halide perovskite can be combined with other parts of the existing devices into the photoelectric detector, the solar cell and the like), so that performance of the devices are improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Light emitting device having plurality of light emitting cells and method of fabricating the same

ActiveUS20110297972A1Prevent electrical short circuitEvenly distributedSolid-state devicesSemiconductor devicesLight CellLight-emitting diode
A light emitting device having a plurality of light emitting cells is disclosed. The light emitting device comprises a substrate; a plurality of light emitting cells positioned on the substrate to be spaced apart from one another, each of the light emitting cells comprising a p-type lower semiconductor layer, an active layer and an n-type upper semiconductor layer; p-electrodes positioned to be spaced apart from one another between the substrate and the light emitting cells, the respective p-electrodes being electrically connected to the corresponding lower semiconductor layers, each of the p-electrodes having an extension extending toward adjacent one of the light emitting cells; n-electrodes disposed on upper surfaces of the respective light emitting cells, wherein a contact surface of each of the n-electrodes electrically contacting with each light emitting cell exists both sides of any straight line that bisects the light emitting cell across the center of the upper surface of the light emitting cell; a side insulating layer for covering sides of the light emitting cells; and wires for connecting the p-electrodes and the n-electrodes, the wires being spaced apart from the sides of the light emitting cells by the side insulating layer.
Owner:SEOUL SEMICONDUCTOR

Intelligent pan with temperature measuring function

The invention relates to an intelligent pan with a temperature measuring function. The intelligent pan comprises a pan body and a handle, and is characterized in that an attached bottom is arranged on the bottom face of the pan body, a thermocouple is arranged at the joint of the pan body and the attached bottom, the detection end of the thermocouple is hidden near the center position of the bottom face of the pan body and makes contact with the bottom face of the pan body, and a temperature measuring structure for directly detecting the center position and periphery of the pan body is formed; a circuit board and a battery are arranged in the handle, a signal acquiring and processing circuit and a wireless signal output circuit are arranged in the circuit board, the signal output end of the thermocouple is connected with the signal input end of the signal acquiring and processing circuit, the output end of the signal acquiring and processing circuit is connected with the input end of the wireless signal output circuit, and the output end of the wireless signal output circuit is externally communicated with kitchen equipment or wireless communication equipment in the mode of transmitting wireless signals outwards. The temperature measuring structure for directly detecting the center position and periphery of the pan body is formed, and the advantages of being uniform in distribution of temperature measuring points, good in hiding performance, firm, durable, safe to use, precise in temperature measuring, wide in temperature measuring range, high in efficiency and simple in manufacturing process are achieved.
Owner:深圳酷平方科技有限公司

Wiring box for solar photovoltaic electrification component

The invention relates to a junction box of a solar photovoltaic generating unit and belongs to the technical field of solar power component. The junction box comprises a box cover, a box body and an electric switching device consisting of a set of bypass diodes; the electric switching device is arranged inside the box body; the box cover is arranged on the box body; the electric switching device also comprises a set of radiating ribs which at least have the same number with the bypass diodes; each bypass diode is arranged on the radiating rib; two sides of the length direction of the box body form a box wing respectively; the bottom of the outer side of the middle part in the length direction of the box body is alternately extended with convex strips; a ventilating channel is formed between two convex strips; and the ventilating channel is communicated with a ventilating port which is arranged on the box body and is communicated with outside. The junction box has the advantages that the bypass diode is fixed on the radiating rib; heat produced by the bypass diode is evenly dissipated through the radiating rib; the bottom of the box body is extended with the convex strips; and after the box body is arranged on a solar photovoltaic cell plate, the box body does not shade the solar photovoltaic cell plate so as to facilitate heat dissipation.
Owner:SUZHOU ZHONGCHAO INFORMATION TECH

Preparing method for powder metallurgy high-entropy alloy based composite material

InactiveCN105734324AEvenly distributedGood combination of reinforcement and matrix interfaceIncreasing energy efficiencyHigh entropy alloysPowder metallurgy
The invention relates to a preparing method for a powder metallurgy high-entropy alloy based composite material, and belongs to the field of powder metallurgy materials. The preparing method includes the steps that all components are prepared and taken according to component proportions of a designed high-entropy alloy matrix, and high-entropy alloy powder is prepared through a gas atomization method; and then according to the component proportions of the designed high-entropy alloy based composite material, the high-entropy alloy powder and wild phase titanium diboride powder are prepared and taken, and rapid sintering molding is achieved after even mixing is carried out. According to the preparing method, the atomization method is adopted for preparing spherical high-entropy alloy powder with relatively-even ingredients in advance, and therefore a simple solid solution phase structure of a high-entropy alloy is guaranteed; and discharging plasma rapid sintering is adopted for preparing the needed powder metallurgy high-entropy alloy based composite material, and therefore the shortcoming that the material is prepared with metal powder as a raw material through a powder metallurgy method traditionally, and consequently the high-entropy alloy of the simple solid solution structure is difficult to obtain is overcome. The preparing method is simple in process procedure; according to the prepared powder metallurgy high-entropy alloy based composite material, titanium diboride is evenly distributed, reinforcement and base body interface bonding is better, the comprehensive performance is more excellent, the specific strength is high, the specific rigidity is high, and the abrasive resistance and the corrosion resistance are excellent. The preparing method is suitable for industrial production.
Owner:CENT SOUTH UNIV

Preparation method of fluorescent waterborne polyurethane emulsion based on chromophore in diisocyanate

The invention discloses a preparation method of a fluorescent waterborne polyurethane emulsion based on chromophore in diisocyanate. The preparation method is characterized by comprising the following steps of: enabling monoamine or monohydric alcohol containing fluorescent chromophore to be reacted with isocyanate, or enabling diamine or dihydric alcohol containing the fluorescent chromophore to be reacted with diisocyanate with a symmetric structure to synthesize diisocyanate containing the fluorescent chromophore, and then combining the diisocyanate containing the fluorescent chromophore with common diisocyanate to partially or completely substitute for the common diisocyanate to prepare the fluorescent waterborne polyurethane. According to the preparation method disclosed by the invention, the hard segment content and type of the prepared fluorescent waterborne polyurethane and the content (2-40wt%) of the fluorescent chromophore are controllable by adjusting the types and proportions of the diisocyanate and a chain extender, and the prepared fluorescent waterborne polyurethane has the advantages that the fluorescent chromophore is uniformly distributed and difficult to migrate, the fluorescent intensity is good in durability, and improvement in terms of optical, thermal and certain functional characteristics can be achieved while the fluorescent property is achieved.
Owner:UNIV OF SCI & TECH OF CHINA +1

Biomass-based nitrogen-doped porous carbon material, and preparation method and application thereof

The invention provides a preparation method of biomass-based nitrogen-containing porous carbon with the advantages that simplicity is realized; the implementation is easy; the cost is low. According to the method, the in-situ doping of nitrogen atoms in the carbon material preparation process is realized by a one-step foaming method; cheap and reproducible protein-rich plants are used as carbon precursors; the in-situ doping of nitrogen atoms in the carbon material preparation process is favorably realized, so that the doping content is controllable, and the distribution is uniform. All raw materials are renewable resources; green and environment-friendly effects are achieved; simplicity is realized; the obtaining is easy; the resources are rich; the cost is low. Meanwhile, the method provided by the invention has the advantages that the nitrogen-doped porous carbon material with the large specific surface area can be obtained without complicated multistep operation; the preparation process is simple; the use of high-pollution chemical reagents such as ZnC12, strong base and strong acid is avoided; the environment-friendly effect is achieved; the operation is convenient; equipment cannot be corroded in the production and use processes; the method is suitable for large-scale production.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI +1

Method for manufacturing doped optical fibre preform by MCVD (modified chemical vapour deposition)

The invention discloses a method for manufacturing a doped optical fibre preform by MCVD (modified chemical vapour deposition), comprising the following steps of: orderly depositing an inner cladding and a loose ash core layer in a deposition tube; reducing the intake port end of the deposition tube to cause the inner diameter of the end to be less than or equal to the inner diameter of the loose ash core layer; heading and snapping the tail end of the deposition tube to close the tail end of the deposition tube; injecting solution containing rare-earth elements or transition metal elements in the deposition tube, and transversally installing the deposition tube on a lathe to soak the loose ash core layer; sintering the loose ash core layer into a glass layer; and melting-reducing the deposition tube, the inner cladding and the loose ash core layer into a solid preform. In the method disclosed by the invention, the deposition tube is horizontally placed to rotationally soak, the purpose of high-concentration doping can be realized only by the need of a small amount of rare-earth solution, and 80-90% of rare-earth solution can be saved, thereby decreasing manufacturing cost. Simultaneously, the distribution of rare-earth elements in the longitudinal direction of preform core layer is enabled to be more uniform, thereby further increasing the rare-earth doping concentration of preform core layer.
Owner:HANGZHOU FUTONG COMM TECH CO LTD
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