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3291results about How to "Effective combination" patented technology

High-precision three-dimensional real scene indoor and outdoor integrated positioning method and device

The invention discloses a high-precision three-dimensional real scene indoor and outdoor integrated positioning method and device. The method comprises the steps that the GPS positioning result is introduced to the indoor, multiple reference points of which the GPS coordinates are measurable are selected in the indoor, and a platform coordinate system is established with the reference points acting as the origins of coordinates; a laser three-dimensional scanner is introduced to the reference points so that indoor three-dimensional point cloud information is acquired, and high-precision indoor scene reconstruction is completed; an optimized coordinate transformation model is constructed according to the relationship between the platform coordinate system and a scanner coordinate system to unify the point cloud to the platform coordinate system; and coordinate transformation is further performed on an ultra-wideband indoor positioning system coordinate system and the coordinate data so that indoor target positioning is completed. The beneficial effects of the positioning method and device are that the point cloud data are introduced on the basis of the indoor positioning system, the high-precision visual indoor three-dimensional scene with geodetic coordinates is obtained by using the optimized coordinate transformation model, and the indoor positioning precision can be the decimeter level; and integration of indoor and outdoor positioning can be realized, and a browsable spatial information management system is provided.
Owner:EAST CHINA NORMAL UNIV

Parking guidance system and method thereof based on release and forecast of parking index

InactiveCN102542841APublishing communicates intuitivelyAdd exponent operation unitIndication of parksing free spacesData transmissionGuidance system
The invention discloses a parking guidance system and a method thereof based on release and forecast of a parking index, and belongs to the technical field of parking management and vehicle detection of the internet of things. The parking guidance system comprises an information acquisition subsystem, a data transmission subsystem, a central control subsystem and an information release subsystem,wherein the central control subsystem comprises an information release server, an index operation unit, a database server and a management terminal; in addition, the information release subsystem comprises terminals such as an internet, a vehicle-mounted GPS (Global Positioning System), a traffic transceiver, a three-color guiding panel, a mobile phone. The method of the parking guidance system acquires the flow information of an outlet and an inlet of a parking lot, uploads the data, and computes the parking index. Finally, the computed result of the parking index is transmitted to the terminals of the information release subsystem. The parking guidance system and the method thereof can release the parking index and forecast the travel information visually and roundly, and can effectively integrate the conventional parking guiding information and other dynamic information such as real time traffic status.
Owner:北京百会科技有限公司 +2

Heat recovery type multi-connection air condition unit

The invention discloses a heat recovery type multi-connection air condition unit, comprising at least one outdoor unit, a plurality of indoor units and at least one hot and cold converter. The outdoor unit comprises a compressor, an outdoor heat exchanger, a subcooler, two four-way reversing valves and three refrigerant pipelines; each indoor unit comprises an indoor heat exchanger; and the hot and cold converter comprises expansion valves and a bypass capillary, wherein the expansion valves control the on-off of a high pressure air pipe and a low pressure air pipe, and the bypass capillary is arranged between the high pressure air pipe and the low pressure air pipe. When the indoor unit connected with the hot and cold converter is used for heating, the expansion valve at the high pressure air pipe side is turned on and the expansion valve at the low pressure air pipe side is turned off to realize the connection of the air pipe of the indoor unit and the high pressure air pipe. When the indoor unit connected with the hot and cold converter is used for cooling, the expansion valve at the low pressure air pipe side is turned on and the expansion valve of the high pressure air pipe is turned off to realize the connection of the air pipe of the indoor unit and the low pressure air pipe. By the air condition unit, the combination of the units as well as the function of two-pipe heat pump air condition can be realized, and the common two-pipe heat pump air conditioner and the heat recovery type air conditioner capable of cooling and heating simultaneously are effectively combined.
Owner:QINGDAO HISENSE HITACHI AIR CONDITIONING SYST

Preparation method for high-wave permeability super-hydrophobic moisture-proofing coating for antenna housing material

The invention discloses a preparation method for high-wave permeability and super-hydrophobic moisture-proofing coating for an antenna housing material. The preparation method is characterized by comprising the following steps of: preparing hole-sealing emulsion; preparing super-hydrophobic moisture-proofing emulsion; coating the hole-sealing emulsion on the antenna housing material, surface-drying the film coating under a room temperature, and then curing the film coating under the temperature of 100 DEG C to 140 DEG C; cooling and immersing the film coating to the super-hydrophobic moisture-proofing emulsion; surface-drying the film coating under the room temperature, and curing the film coating under the temperature of 80 DEG C to 160 DEG C to acquire the high-wave permeability and super-hydrophobic moisture-proofing coating for the antenna housing material. Micron-level silicon dioxide and fluorine-containing polymer are used in the method to perform accumulating and hole-sealing;a micron surface structure with certain roughness is provided, and epoxy resin with good viscosity is added to the hole-sealed coating, so that the mechanical property of the hole-sealed coating is improved; a self-growth method is adopted for depositing micron-level fluorine-containing polymer, which is in-situ packaged by organic silicon resin and attached with hydrophobic nanometre silicon dioxide, to the surface of the hole-sealed coating, so that the high-wave permeability and super-hydrophobic moisture-proofing coating of the antenna housing material is prepared.
Owner:SOUTHWEAT UNIV OF SCI & TECH

Energy-saving heat supply system with function of reducing temperature of heat supply return water

The invention discloses an energy-saving heat supply system with a function of reducing the temperature of heat supply return water, and belongs to the field of improvement of energy utilization efficiency. Heat exchange can be repeatedly carried out on heat sources by multistage heat exchangers, multistage absorption heat exchange units, multistage compression heat pumps and an ice making type refrigerator, accordingly, the heat supply areas can be enlarged, and the energy utilization efficiency can be improved. The energy-saving heat supply system has the advantages that the temperature of the return water of heat supply primary pipe networks can be reduced and reach 0 DEG C, the return water contains 10% of ice particles, accordingly, route heat loss of the return water of the heat supply primary pipe networks can be reduced, the temperature difference of the return water of the heat supply primary pipe networks can be increased and reaches 118 DEG C from the original 60 DEG C, the flow rate of circulating water of the heat supply primary pipe networks can be lowered, energy consumption of circulating pumps can be reduced, heat supply flow rates of a user side can be greatly increased, the delivery efficiency of the pipe networks can be improved, the heat supply scale can be expanded, waste heat of a cooling tower can be recycled, and the like.
Owner:DALIAN BAOGUANG ENERGY SAVING AIR CONDITIONING EQUIP

Substrate with surface-enhanced Raman scattering activity and preparation method thereof

The invention provides a substrate with surface-enhanced Raman scattering activity and a preparation method thereof, and the method comprises the following steps: the glass base surface is subjected to hydroxylation and amination treatment; catalytic hydrolysis is carried out on ethyl orthosilicate under the alkali condition by taking alcohol as a solvent; Silica microspheres with even size and smooth surface are prepared by an oscillation method; silane coupling agent of which the tail end is provided with amino is assembled on the surface of the silica microspheres; silver sol obtained by reducing sodium borohydride to silver nitrate through oscillation is assembled on the surface of SiO2-NH2NPs, and is diffused in water again after centrifugal separation and washing by distillated water; self assembly is carried out on the silver sol after being placed in SiO2@Ag NPs dispersion for 6-12h; the SERS active substrate is obtained after taking out from water and drying. In the SERS active substrate of the invention, the active particles and the substrate are combined firmly, thus being applicable to detecting unimolecular Raman signals in aqueous solution; the substrate can be used for SERS detection repeatedly, thus improving repeated utilization ratio of the substrate.
Owner:NORTHWEST NORMAL UNIVERSITY
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