17results about How to "Extend the usable time" patented technology

The invention discloses a UWB-based three-dimensional positioning method for tunnel safety monitoring, and the method comprises the steps: arranging an antenna array composed of a plurality of pairs of antennas on an anchor node, only needing one time of DS-TWR communication, enabling a to-be-measured node to be a distance measurement initiator, transmitting a distance measurement request frame according to a set period, enabling the anchor node to be a distance measurement responder, and enabling the distance measurement request frame to be transmitted according to a set period in the antenna array; a certain antenna which firstly receives the request frame serves as a response antenna, the other antennas serve as non-response antennas, and the anchor node calculates the distance between each antenna and the node to be tested according to the difference value of the receiving timestamps of the node to be tested, the response antenna and the non-response antenna; and based on the distance and the PDOA data, obtaining the coordinates of the to-be-measured node subjected to coarse positioning and the coordinates of a plurality of candidate to-be-measured nodes subjected to fine positioning, and screening the node with the minimum distance to the coordinates of the to-be-measured node subjected to coarse positioning from the plurality of candidate to-be-measured node coordinates as a final positioning result of the to-be-measured node. According to the invention, accurate positioning requirements in scenes such as subway tunnels and the like can be effectively met.

The invention discloses an aero-engine silicon carbide ceramic matrix composite part crack damage repairing method which comprises the following steps: removing an environmental barrier coating on the surface of a part, cleaning and drying; powdery active metal brazing filler metal and a connecting agent are selected to be mixed and then coated on cracks and nearby areas on the surface of the part; vacuum brazing, weld joint polishing, cleaning and drying are conducted; preparing a bonding layer and a middle layer of the environmental barrier coating by using atmospheric plasma spraying equipment, and preparing a surface layer of the environmental barrier coating by using a plasma-physical vapor deposition method; and the environmental barrier coating is polished, annealing treatment is conducted, and crack damage repairing of the silicon carbide ceramic matrix composite part of the aero-engine is completed. According to the vacuum brazing process, the strength of the base material can be effectively recovered by 50%-60%, the usable time of the base material is prolonged, parts can continue to serve, and the parts are prevented from being scrapped in advance; in addition, according to the EBC coating preparation technology, the porosity of the coating can be reduced, and therefore the service time of the repaired part is further prolonged.

The invention relates to a preservation method for prolonging the usable time of sodium silicate-bonded sand, which comprises the following steps: putting mixed sodium silicate-bonded sand into a sealed container, and pumping out air in the sealed container by using a vacuum pump, so that the interior of the sealed container is preserved in a vacuum state. The usable time of the sodium silicate-bonded sand stored according to the method disclosed by the invention is obviously higher than that of the sodium silicate-bonded sand stored by the existing storage method in the production of the sodium silicate-bonded sand, and compared with the existing storage method, the method has obvious technical advantages, reduces the waste of the sodium silicate-bonded sand, saves resources, and has higher practical value and wide application prospect.

The utility model belongs to the technical field of parking lot guideboards, and particularly relates to a parking lot guideboard with a structure convenient to maintain, which comprises a guideboard, the bottom end of the guideboard is connected with a frame rod, the bottom end of the frame rod is connected with a bottom plate, and the surface of the bottom end of the bottom plate is provided with a bearing plate; side plates are arranged on the surfaces of the frame rods, clamping blocks are arranged at the bottom ends of the side faces of the frame rods, limiting blocks are arranged on the surfaces of the clamping blocks, clamping rods are arranged in the limiting blocks, and connecting rods are installed on the surfaces of the clamping blocks. When the guide plate is more convenient to maintain, the clamping rod needs to be pulled out, the clamping block connected with the side face of the bottom plate can be driven by the pulling plate to move along the position of the sliding block, then the guide plate and the frame rod are detached, meanwhile, the side plate on the surface of the frame rod is taken down, and the damaged frame rod is replaced. In this way, the guide board can be maintained more conveniently, and the situation that the guide board cannot be used due to maintenance is avoided.

The present invention discloses a three-dimensional positioning method based on UWB for tunnel safety monitoring. An antenna array consisting of multiple pairs of antennas is set on an anchor node. Only one DS-TWR communication is required. The node to be measured is a ranging initiator, and a ranging request frame is sent according to a set period. The anchor node is a ranging responder. In the antenna array, an antenna that first receives the request frame is used as a response antenna, and the remaining antennas are non-response antennas. The anchor node calculates the distance between each antenna and the node to be measured according to the difference in receiving timestamps of the node to be measured, the response antenna, and the non-response antenna. The coordinates of the node to be measured for rough positioning and the coordinates of multiple candidate nodes to be measured for precise positioning are obtained based on the distance and PDOA data. The coordinates of the node to be measured with the smallest distance from the coordinates of the node to be measured for rough positioning are selected from the multiple candidate node coordinates for the node to be measured as the final positioning result of the node to be measured. The present invention can effectively meet the demand for precise positioning in scenes such as subway tunnels.

The invention provides light-heat dual-curing polyurethane acrylate resin and a preparation method and application thereof, and the light-heat dual-curing polyurethane acrylate resin is prepared from the following raw materials in parts by weight: 20-80 parts of hydroxyl and / or amino-terminated polyurethane prepolymer; 10 to 70 parts of a blocked isocyanate acrylate functional monomer; 8-60 parts of a diluting monomer; and 0.5 to 2 parts of a photoinitiator. The photo-thermal dual-curing polyurethane acrylate resin provided by the invention has a relatively slow viscosity increasing rate, and can effectively help to prolong the service time of the resin; and excellent mechanical properties and solvent resistance are achieved.

A photocurable composition useful for forming a durable impact-resistant coating on nails comprising: a). at least one (meth)acrylate functionalized monomer; b). at least one (meth)acrylate functionalized oligomer; c). at least one particle of a core / shell copolymer; and d). at least one photoinitiator.

The invention relates to the related technical field of sewage treatment, in particular to a concentration and filtration device for heavy metal sewage treatment, which comprises a first filtration mechanism, a second filtration mechanism and a collection mechanism, the first filtering mechanism comprises a mixing box and an arc-shaped filtering plate, a mixing assembly and a cleaning assembly are arranged in the mixing box, and a sliding pin can be driven to slide in an arc-shaped sliding groove of an arc-shaped scraping plate in a reciprocating mode under the action of a connecting plate and an inclined plate while mixing of sewage and a sewage treatment agent is achieved through a rotatably-arranged mixing shaft; an arc-shaped scraping plate is driven to swing in a reciprocating mode, the effect of scraping impurities left on an arc-shaped filtering plate is achieved, and then the effects of prolonging the service life of the arc-shaped filtering plate and prolonging the service life of the arc-shaped filtering plate are achieved; the problems that in the using process of a traditional concentrating and filtering device for heavy metal sewage treatment, adsorption saturation of a filtering layer is too fast, and frequent replacement is needed are solved.

This application relates to a heater and a smoking device. The smoking device includes a housing, and the heater is mounted on the housing. The heater includes a substrate and a heating film mounted on the substrate. The heating film can heat the aerosol-forming matrix through a combination of infrared radiation and contact heat conduction, reducing energy loss caused by excessive infrared emissivity during operation, thereby improving the energy utilization rate of the heating film and reducing the power consumption of the heating film in heating the aerosol-forming matrix, thus increasing the battery life and improving the smoking device's endurance. At the same time, it eliminates the need for an additional reflective layer or a transparent substrate, simplifying the heater's structure and manufacturing process, and reducing manufacturing costs.

The invention provides a low-power-consumption vital sign monitoring device, and belongs to the technical field of medical equipment. The sensor module, the processing and control module and the power supply and communication module are integrated in the wrist type device shell; the elastic band is located on one side of the wrist type device shell; the embedding groove is formed in one side of the wrist type device shell; the fixing rod is located inside, and the elastic band is located in the inlaying groove; according to the design philosophy that the system can accurately distribute energy according to a real-time task load, a high-power-consumption module is temporarily awakened only when necessary, and energy is supplied as required and dormancy is rapid, the overall power consumption of the device is reduced to an extremely low level on the premise of providing uninterrupted vital sign monitoring, so that the usable time after single charging is remarkably prolonged, and the service life of the device is prolonged. And the long-term endurance bottleneck problem of the wearable equipment is solved.

The invention discloses a photovoltaic pump control device and a photovoltaic pump, and relates to the photovoltaic field, the photovoltaic pump control device comprises a photovoltaic module, the output end of the photovoltaic module is connected with the direct current input end of a frequency converter, and the photovoltaic module is used for converting solar energy into direct current and outputting the direct current to the frequency converter; the input end of the AC module is connected with commercial power, and the output end is connected with the AC input end of the frequency converter for outputting the commercial power to the frequency converter; the frequency converter is used for converting the direct current output by the photovoltaic module or the alternating current output by the alternating current module into target alternating current so as to drive the motor; the power supply end of the motor is connected with the output end of the frequency converter, and the output end is connected with the driving end of the water pump. The alternating current module can also supply power to the frequency converter, so that unstable power supply voltage caused by single photovoltaic module power supply is avoided, the frequency converter can convert voltage based on direct current and alternating current, the voltage for driving the water pump is more stable, and meanwhile, the usable time of the photovoltaic water pump is prolonged.

The present application relates to the technical field of installation and commissioning of self-elevating platforms, and particularly relates to a seawater cooling system of a self-elevating platform. The seawater cooling system of the self-elevating platform comprises a seawater cooling module, a docking module, a first connecting pipeline and a second connecting pipeline. The seawater cooling module, the docking module and the second connecting pipeline all belong to the self-owned structure of a ship. The seawater cooling module has a cooling demand. The docking module comprises a reaction cabin and a distribution cabin. The seawater in the reaction cabin is used for cooling the seawater cooling module, and the seawater in the distribution cabin is used for neutralizing the heat of the seawater in the reaction cabin. The first connecting pipeline is configured to communicate the output end of the seawater cooling module with the input end of the reaction cabin and the output end of the distribution cabin respectively. The first connecting pipeline can control the conduction and isolation between any two of the seawater cooling module, the reaction cabin and the distribution cabin. The second connecting pipeline is configured to communicate the output end of the reaction cabin with the input end of the seawater cooling module.

The present invention discloses an information processing device, a server device, and a storage medium, which can ensure convenience while extending the usable time of the device. The information processing device includes a battery remaining amount acquisition unit as a remaining amount acquisition means, and an operation function restriction unit as an operation function restriction means. The battery remaining amount acquisition unit acquires the remaining power of a battery as a power supply means for supplying power to a portable terminal device. Moreover, the operation function restriction unit restricts the operation function based on the remaining power of the battery and the use frequency of each function of the portable terminal device.

The utility model discloses a granulating device for film waste, which relates to the technical field of waste processing equipment and comprises a stirring bin and a material extruding bin which are arranged up and down and communicated, a stirring rod is arranged in the stirring bin and can stir molten materials, a material extruding screw is arranged in the material extruding bin and can extrude the molten materials, and the material extruding screw is connected with the stirring bin and the material extruding bin. A plurality of heat preservation sleeves embedded with heating rings are arranged on the outer wall of the material extruding bin in a sleeving mode at intervals, a mouth mold assembly formed by splicing a plurality of pore plates front and back is installed at the output end of the material extruding bin, and the mouth mold assembly is at least provided with a set of cutters used for cutting extruded materials into particles. Compared with the prior art, the heating ring can heat the extrusion bin to a certain extent, and materials inside the extrusion bin are prevented from being condensed too early.

The utility model provides a drying device of an inverter, and relates to the field of inverter drying. The drying device of the inverter comprises an outer box, a drying mechanism and a heat dissipation mechanism, a sealing mechanism is arranged on the right side of the outer box and comprises a baffle and a silica gel plate, the baffle is arranged on the front side of the heat dissipation mechanism, the side face of the silica gel plate is fixedly connected with the side face of the baffle, and the drying mechanism is arranged on the left side of the outer box. The bottom of the heat dissipation mechanism is fixedly connected with the bottom of the inner wall of the outer box. According to the drying device of the inverter, the sealing mechanism is arranged, an electric push rod in the movable cavity extends to drive a baffle to move backwards, and the baffle moves to a silica gel plate to be attached to an air outlet, so that the situation that external gas which is not dried enters the outer box is avoided, and the situation that the effect of a drying box is reduced due to an open use environment is prevented; the use cost of the inverter is reduced, the service life of the inverter is prolonged, and the cost performance of the drying device is improved.

The utility model discloses a forge piece manipulator claw beam automatic grabbing centering device which comprises a manipulator assembly, a cooling assembly, a circulating water pump assembly and an air injection assembly, the front end of the manipulator assembly is fixedly connected with the cooling assembly, and the middle of the manipulator assembly is fixedly connected with the circulating water pump assembly. The front end of the operation machine assembly is further fixedly connected with the air injection assembly. The middle part of the operation rack is fixedly connected with the water tank; the controller is fixedly connected to the upper end of the operation rack; the handrail is fixedly connected to the rear end of the operation rack; the stair is fixedly connected to the left end of the operation rack and fixedly connected with the lower end of the handrail; and by arranging the cooling assembly capable of cooling the device, the device can be rapidly cooled when the temperature of the device is high, so that the device is not easily influenced by high temperature, and the service time of the device is prolonged.

The invention relates to a sealing device of a fan and a Roots fan. The invention discloses a sealing device of a fan. The sealing device comprises a shaft sleeve, a shaft seat, at least two piston rings, a framework oil seal and an end cover, sealing rings are arranged on the inner walls of the shaft sleeves. The shaft seat sleeves the outer wall of the shaft sleeve; a mounting groove is formed in the inner wall of the shaft seat. The at least two piston rings are installed between the shaft sleeve and the shaft seat and serve as first sealing positions. The framework oil seal is arranged in the mounting groove, and the framework oil seal is arranged on the shaft sleeve in a sleeving mode and serves as a second sealing position; and the end cover sleeves the outer wall of the shaft sleeve. The end cover is further connected to the end, close to the framework oil seal, of the shaft seat. The piston ring forms the first sealing position, the framework oil seal forms the second sealing position to form the composite sealing structure, the sufficient sealing effect is guaranteed, and due to the structural characteristics of the piston ring and the framework oil seal, the risk that sealing liquid of an existing sealing device leaks is avoided; therefore, the service life of the sealing device is prolonged, and the overhaul and disassembly frequency is reduced.