115results about How to "Guaranteed long-term reliability" patented technology

The invention provides a large-scale distributed data collection system and method, and belongs to the technical field of data collection. The system comprises a task distributed node module, a management node module, a task warehouse module and a collection node module. A management node is used for providing a distributed synergic service, receiving and managing registered information of a collection node and a task distributed node, and performing communication on the collection node and the task distributed node on the basis of the certain frequency; the task distributed node is used for setting, distributing and monitoring collection tasks; a task warehouse is used for receiving and storing a collection task sent by the task distribution node; the collection node is used for obtaining the collection task from a task input warehouse and completing collection of corresponding data in an on-site control station; the collection task executed by the collection node can dynamically change according to user settings, a certain or some faults in the task distribution node and the collection node will not affect the current collection period collection result, and the large-scale distributed data collection system has the high flexibility, high tolerance and high reliability.

The present invention discloses a wafer-level packaging of chip and a packaging method thereof. The wafer of upper cover plate is installed with an upper sealing ring strip. The wafer of lower cover plate is installed with a lower sealing ring strip matched with the lower sealing ring strip. The upper sealing ring strip and the lower sealing ring strip are eutectic or hot-pressed and spread for realizing packaging. Or the wafer of upper cover plate is coated with a bonding layer of epoxy resin, polymer, metal or alloy material. The wafer of lower cover plate is installed with a lower sealing ring strip matched with the upper sealing ring strip. The lower sealing ring strip squeezes the bonding layer for realizing packaging. The wafer-level packaging of chip can increase the sealing performance of internal and external environments. The packaging period can greatly increase the finished product rate after bonding, increase the sealing quality and guarantees the long-time reliability.

The invention relates to a hierarchical wireless sensor network time synchronization method and belongs to a wireless sensor network time synchronization method. The method respectively adopts different synchronization mechanisms aiming at response nodes and ordinary non-response sub nodes and adopts different estimation methods to calculate the clock offset and the clock frequency offset relative to reference nodes; the hierarchical time synchronization method is divided into two stages, namely a hierarchical discovery and sub node collection stage and a time synchronization stage, wherein during the hierarchical discovery and sub node collection stage, a hierarchical structure of a wireless sensor network is established, and the response nodes on each layer are determined through collecting sub node information; during the time synchronization stage, a maximum likelihood estimation method and a least square method are utilized for calculating the clock offset and the frequency offset between the sub nodes and the reference nodes, a clock is further compensated, and by parity of reasoning, the synchronization within a whole network range is finally achieved. The hierarchical wireless sensor network time synchronization method has the advantages that the synchronous message overhead is reduced, and the energy consumption is reduced; the time synchronization accuracy is improved; the expandability is enlarged on aspect of new node addition.

The invention provides an LED chip of a surface mounting type LED with high reliability and an integer structure of a lens and a manufacturing method thereof, characterized in that, through a middle layer of 0.01-2 mm thick, a convex lens part is formed on a supporting structure mounted with an LED chip; the LED chip mounted on the supporting structure is imbedded in the middle layer or imbedded from the middle layer to the convex lens part at the opposite position to the convex lens part, moreover, the middle layer and the convex lens part are made of the same materials to form an integer.

The invention is applicable to the technical field of electronic devices and provides an intelligent power module manufacturing method. The method comprises the following steps: selecting a metal substrate, arranging an insulating layer and a circuit wiring on the metal substrate, installing circuit elements and pins on the circuit wiring and enabling the run of the pins to gradually incline upward; placing the metal substrate in a packaging mold, fixing the pins on a horizontal plane through a first fixing device and making the surface of the metal substrate incline relative to the horizontal plane; configuring a metal pressing block parallel to the horizontal plane and pressing the metal pressing block on the metal substrate to make the metal pressing block parallel to the horizontal plane; and injecting packaging material in the mold to seal the substrate. The metal substrate is accurately positioned in the packaging mold through the metal pressing block, holes can be prevented from being reserved in the packaging structure, and the packaging compactness is improved. After packaging is completed, the position of the metal pressing block in the packaging structure can be directly measured by using a simple measuring tool so that the position of the metal substrate in the packaging mold can be known and subsequent inspection is facilitated.

The invention relates to a high-frequency induction brazing method for the connection of a deep cavity inner conductor of a coaxial transmission line. The coaxial transmission line consists of an inner conductor and a hollow outer conductor. The inner conductor is connected with two conductors to form a T shape or an L shape and the brazing method comprises the following steps: the connection ends of the two conductors are respectively provided with a threaded hole and a screw rod; a tool withdrawal groove at the joint of the threaded hole and the screw rod is provided with welding wires or coated with solder pastes; and the two conductors are screwed to lead an induction coil to be sleeved at the end joints of the deep cavity inner conductor or the joints between a supplementary conductor and the inner conductor. The welding conditions are as follows: the power, power rate and heating and electrifying time of a high frequency generator are respectively 5KW, 30-60 percent and 6-80 seconds. In the induction heating brazing, the local temperature of the weld joint of a workpiece can meet the requirement of the brazing temperature rapidly and solders are spread evenly. Compared with the integrative heating method, the heat absorbed by the workpiece has small heat input and centralized heat. The high-frequency induction brazing method utilizes the internal thermal conductance of the workpiece to cool water or assist water cooling, thereby rapidly realizing the brazing connection of the connection ends and high quality of weld seams.

The invention provides a color temperature adjustable LED integrated light source. The color temperature adjustable LED integrated light source comprises: a substrate; a light source which comprises an array composed of at least two white-light LEDs coated with different fluorescent materials for realizing different color temperatures, wherein each white-light LED is coated with a corresponding fluorescent material and then is packaged on the substrate; and a control unit which is installed on the substrate for controlling the luminescence effect of a lamp group composed of the white-light LEDs with the different color temperatures. According to the invention, through a mode of respectively coating the white-light LEDs with the fluorescent materials, the effect of obtaining high- luminous flux output on a small luminescence surface and color temperature adjustability are achieved. By use of an array type COB packaging mode, the space occupied by the white-light LEDs is reduced, more space is reserved on the substrate for a peripheral circuit, and the expandability is improved. By use of the LED packaging mode, after a support is omitted, light attenuation brought by aging of a support material can be avoided, and the long-term reliability of an optical engine is guaranteed.

The invention discloses an anti-thunder and anti-surge circuit, and relates to the technical field of lightning protection; the anti-thunder and anti-surge circuit comprises an anti-thunder circuit which is bridged between a live line and a null line of a power supply and is used for restraining lightning surge, and an anti-surge circuit which is arranged behind the anti-thunder circuit and is used for restraining continuous surge and further restraining lightning stroke residual voltage; the anti-surge circuit comprises a bridge type rectifier and a wave-eliminating circuit, wherein the inputof the bridge type rectifier is connected to the two ends of the power supply in a bridging mode; and the wave-eliminating circuit is bridged at the output end of the bridge type rectifier and is used for providing fast energy storage and discharging functions. The anti-thunder and anti-surge circuit with the current limiting function and capable of absorbing continuous surge can achieve the lightning protection effect of 12 kV, and in addition, the service life of an anti-thunder and anti-surge device is effectively prolonged, and the long-term reliability of the anti-thunder and anti-surgecircuit is effectively guaranteed.

The invention discloses a device for collecting gravity energy generated during vehicle running on a highway, wherein the device is used for collecting and storing the gravity energy generated during vehicle running on the highway and then converting the stored gravity energy into electric energy, and belongs to the field of new energies. The device for collecting the gravity energy generated during vehicle running on the highway is characterized in that one or a plurality of high-pressure air bags paved on a road surface are rolled and compacted by the wheels of running vehicles, so that the spaces of the high-pressure air bags which are filled with air are extruded to generate high-pressure air, the high-pressure air bursts through high-pressure air outlet check valves so that the high-pressure air in the high-pressure air bags are pressed into high-pressure air storage tanks, and thus, the high-pressure air can be applied in a standby manner so as to drive a pneumatic motor and a generator to generate electricity.

In an active matrix display device in which a data line switching circuit is provided and a plurality of data lines are grouped so as to be connected to one output of a data line drive circuit in order to reduce the number of the outputs of the data line drive circuit, switching elements constituting respective switching sections for selecting the data lines have a short life span so as to be unreliable in the long term. In contrast, a data line switching circuit in accordance with the present invention is provided with switching sections each composed of a plurality of switching elements connected in parallel to each other, so that the life span of the switching elements can be prolonged and the long-term reliability of the switching elements can be improved without obstructing the attempts such as narrowing a frame part and downsizing the whole device.

The invention provides a predicting method of material grain size distribution in a ball-milling process. The method comprises the following steps: acquiring a material grain size distribution predicting model of continuous ore grinding based on a crushing distribution function, a continuous crushing rate function and a standing time distribution function of a material; acquiring a predicted error between the predicted material grain size distribution and the actual material grain size distribution based on the material grain size distribution predicting function; and setting an adjusting threshold value and a plurality of error intervals, and correspondingly adjusting the predicting model based on the relationship between the probability of the predicting error in different error intervals within a certain time and the adjusting threshold value. The method provided by the invention creates conditions for guiding ball-milling production and realizing optimized control of the ball-milling process and energy-saving power consumption.

The invention discloses a carbon-ceramic axle-mounted brake disc suitable for high speed trains. The carbon-ceramic axle-mounted brake disc comprises a disc hub (1). The disc hub (1) is externally andfixedly sleeved with an isolation supporting body (2), a first carbon-ceramic friction body (3), a second carbon-ceramic friction body (4) and a compression ring (5). The isolation supporting body (2), the first carbon-ceramic friction body (3), the second carbon-ceramic friction body (4) and the compression ring (5) are all in a circular ring shape. The first carbon-ceramic friction body (3), the isolation supporting body (2) and the second carbon-ceramic friction body (4) are sequentially laminated in the axis direction of the disc hub (1). The compression ring (5) is arranged inside the first carbon-ceramic friction body (3) in a sleeved mode. The compression ring (5) and the isolation supporting body (2) are arranged in a laminated mode. According to the carbon-ceramic axle-mounted brake disc suitable for the high speed trains, a thermal insulation combined-type structure is adopted, the service life of the brake disc can be greatly prolonged, and long-term reliability of locomotive running is guaranteed.

The invention discloses a silicone special optical fiber inner layer coating with ultra-low glass transition temperature and a preparation method thereof. According to the invention, a prepolymer structure is introduced to phenyl silicone, which improves the refractive index and anti-aging property of the coating; and interface activated resin is introduced to enhance the mechanical strength and long-term reliability of optical fiber. The silicone special optical fiber inner layer coating comprises the following components by weight percent: 40-80% of silicone prepolymer, 0.1-10% of auxiliary,2-10% of a photoinitiator, 10-50% of low temperature active monomer, and 0.5-10% of interface activated resin, wherein the total percentage is 100%. The inner layer coating has the characteristics oflow glass transition temperature, high refractive index after curing, good adhesion to optical fibers, good aging resistance, high and low temperature impact resistance, and the like, and can be cured and shaped under radiation of LED ultraviolet lamps or conventional ultraviolet lamps.

The invention discloses a high-voltage gas immersed termination mounting and positioning structure. A pluggable high-voltage gas immersed termination (GIS) comprises a high-voltage cable, an epoxy sleeve, an inner insulator and a plugging and unplugging mechanism. The structure is characterized in that: three groups of sliding pins and springs are radially uniformly distributed on the end part of a moving contact in the plugging and unplugging mechanism; three sliding chutes are axially formed on the inner hole sidewall of an upper electrode of the epoxy sleeve; the roots of the three sliding chutes are radially provided with a positioning groove respectively; and the three groups of sliding pins and springs of the end part of the moving contact are assembled, disassembled, moved and positioned by the three corresponding sliding chutes and the corresponding positioning grooves. The structure realizes the function of plugging and unplugging the cable relative to the epoxy sleeve, improves the positioning accuracy of the cable, simplifies a mounting process and improves the construction efficiency.

The invention relates to a combined steam injection vacuum pump system capable of utilizing waste heat which is used in a production technique of industrial production needing to obtain vacuum and refining products in vacuum. The combined steam injection vacuum pump unit is mainly formed by the existing steam injection vacuum pump set, especially by additionally arranging a jet apparatus and a condenser between a condenser 5 which is behind the first, the second, the third, the fourth or the fifth grade jet apparatus of the steam injection vacuum pump unit and a jet apparatus and a condenser set which are behind the condenser 5, connecting a water ring type vacuum pump in parallel with the condenser in front of one jet apparatus to from a novel steam injection vaccum pump set and arranging a suction type refrigeration apparatus, a water dividing packet, a steam dividing packet and a waste heat source device on the novel steam injection vacuum pump set. The combined steam injection vacuum pump system capable of utilizing waste heat integrates all the advantages of the existing steam injection vacuum pump and overcomes potential defects thereof by the comprehensive design and not only achieves the effects of energy saving and exhaustion reducing, but also ensures the long period reliability and stability needed by large industrial production.

The invention relates to a high-elasticity epoxy resin which mainly comprises an epoxy resin and an elastic curing agent. The high-elasticity epoxy resin is characterized by comprising the following components in parts by weight: 420-480 parts of epoxy resin, 20-80 parts of flame retardant agent, 25-40 parts of quadrol, 8-47 parts of accelerant, 3-26parts of binding agent, 11-32 parts of diluent and 0-17 parts of temperature resistant toughening agent. Because the high-elasticity epoxy resin adopted as an electronic potting material has the characteristics of elasticity, vibration prevention, moisture prevention, temperature resistance, heat conduction, flame retardance, electric insulation, and the like, the high-elasticity epoxy resin can ensure the long-term reliability of electronic products. The high-elasticity epoxy resin has the advantages of silicon rubber, can maintain the characteristics of the epoxy resin, has reduced cost and widely expanded application range and adds a novel potting material for the electronic industry.

The invention relates to a ball grinder and discloses a device and a method for measuring the inventory of a multifunctional, self-rectifying and fixed-ball grinder. The device comprises a noise probe of the ball grinder and an inventory transducer of the self-rectifying and fixed-ball grinder. The method comprises the following steps: (a) noise energy is extracted and noise frequency spectrum is analyzed; (b) the largest grinding current of the ball grinder is calculated and determined; (c) measurement is implemented automatically in real time, and a curve of the relation between grinding current and the inventory of the ball grinder as well as a curve of the relation between grinding noise and the inventory are rectified; (d) the relation between the grinding current and the inventory of the ball grinder and the relation between the grinding noise and the inventory are fitted, and the inventory of the ball grinder is calculated; (e) the quantity of steel balls inside the ball grinder is determined and output according to the largest grinding current and characteristic spectrum change; (f) the optimal inventory of the ball grinder is determined and output according to noise spectrum change when various materials are fed into the ball grinder. The invention is stable, reliable and characterized by full-scale measurement and long-time accurate measurement.

The invention discloses a cooling system for cooling multiple heat generation parts. The cooling system comprises multiple first heat exchange modules connected in parallel for heat exchange with eachheating part, and a second heat exchange module for heat exchange with the first heat exchange modules and external environments to integrate the cooling system of the multiple heat generation parts;the initial investment of equipment is reduced, and the operation cost is saved; the overall planning of an experimental center is convenient; the space and land sources are saved; first heat exchange quantities of all the first heat exchange modules are metered through a heat metering module to obtain heat generation quantities of the heating parts corresponding to the first heat exchange modules; and the second heat exchange module can adjust the working state through the heat generation quantity of each heating part, so that each heat generation part can be cooled more precisely, and the normal operation of each heat generation part can be guaranteed.

The invention relates to an aquaculture net cage elevating adjusting device and a gravity aquaculture net cage in open sea areas. A water storage floating bin and a water storage sinking bin of the aquaculture net cage elevating adjusting device communicate with each other to form a communicating vessel through a communicating pipe; the water storage floating bin communicates with the water storage sinking bin through a first water pipe and a second water pipe; the first water pipe controls a switch through an electromagnetic valve; a submersible pump is arranged in the water storage sinking bin; and the submersible pump is connected to the second water pipe, and fresh water in the water storage sinking bin can be sent to the water storage floating bin through the submersible pump. Multiple anchor cables of the gravity aquaculture net cage in open sea areas are distributed along the circumferential direction of a net cage body; the gravity aquaculture net cage in open sea areas corresponding to each anchor cable is provided with the aquaculture net cage elevating adjusting device; and the water storage floating bin of each aquaculture net cage elevating adjusting device is arrangedon the corresponding anchor cable, and the water storage sinking bin corresponding to each anchor cable is arranged at the bottom of the net cage body. The gravity aquaculture net cage can ensure thelong-term reliability of elevating adjustment of the gravity aquaculture net cage, and is simple in structure.

A waveguide type optical isolator comprises a substrate, a waveguiding layer provided with waveguides, a magnetic garnet, magnetic field applying means, and a package substrate, wherein a first magnet and a second magnet is provided as the magnetic field applying means, and the first magnet and the second magnet are housed and fixed within a magnet holder.