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53results about How to "Have self-healing ability" patented technology

Graphene/carbon nanotube cement-based waterproof material and preparation method thereof

The invention discloses a graphene/carbon nanotube cement-based waterproof material and a preparation method thereof. The waterproof material is prepared from the following raw materials in parts by weight: 1.2-2 parts of an aqueous solution and 15-25 parts of powder, wherein the aqueous solution is prepared from the following materials in parts by weight: 0.005-0.03 part of graphene, 0.005-0.3 part of a carbon nanotube, 0.8-1.2 parts of water, 0.1-0.3 part of a dispersing agent and 0.1-0.3 part of a defoaming agent; and the powder is prepared from the following materials in parts by weight: 6-9 parts of portland cement, 12-14 parts of silicious fine sand, 0.6-1 part of an industrial residue, 0.8-2 parts of a superfine silica mineral admixture, 1.5-3.5 parts of a silica mineral admixture, 1.2-2.2 parts of bentonite and 0.1-0.4 part of a reductive water reducing agent. The graphene/carbon nanotube cement-based waterproof material has the advantages that firstly, the graphene/carbon nanotube cement-based waterproof material has good impermeability and good impervious self-healing ability and the service life is prolonged; and secondly, the waterproof material can form a compact surface enhancement layer on the surface of a concrete structure, can play a waterproofing role, and is capable of reducing the carbonization depth of concrete.
Owner:HOHAI UNIV

Hysteresis control method of three-phase four-switch-type active filter

The invention discloses a current hysteresis control method of a three-phase four-switch-type active filter. The hysteresis control method of the three-phase four-switch-type active filter comprises the following steps: 1, firstly, three-phase reference directive current of an active filter and three-phase compensation current output actually are converted into a coordinate system with alpha-beta two-phase orthogonality by Park conversion; 2, output signals d alpha and d beta are obtained from error signals between the reference current and the actual output current after Park conversion by a hysteresis comparator; 3, a corresponding switch state table is obtained according to the topological structure of the three-phase four-switch-type active filter, and the switch action functions of two bridge arms are obtained by combining with the hysteresis comparison result and the switch state result, so that the hysteresis control of the three-phase four-switch-type active filter is realized. The hysteresis control method of the three-phase four-switch-type active filter, which is provided by the invention, is simple and reliable, is good in dynamic performance, and has favorable economic significance and market prospect.
Owner:SOUTHEAST UNIV

Novel ecological landscape type bank revetment system

ActiveCN102660934ALight in massReduce project cost and construction periodWater resource protectionCoastlines protectionTriangular prismEcosystem
The invention relates to a construction method of ecological bank revetment, in particular to a construction method of ecological bank revetment with landscape function and simple construction. In the method, triangular prism shaped building blocks are built on a bank from bottom up and connected with connection members, plant is planted on each layer of the building blocks, and an ecological corridor is formed under each layer of the building blocks. The system solves the problem that channel revetment landscape function and ecological function can not be achieved simultaneously at present. When the bank revetment is constructed, flower/grass is planted in a plant flume on the building block and matches with a shaped pattern to form a landscape wall, and the ecological corridor provides a living and habitat place for aquatic animals and microbes. The building blocks in horizontal rows are connected in series by connection members and anchored to enhance the stability of the overall structure and water flow impact resistance. The inventive landscape ecological bank revetment provides multiplication and living conditions for aquatic plant/animals and microbes, forms a small-sized ecological system where plant/animals and microbes are symbiotic and coexistent at the water area-land transitional zone of a river channel, and plays the role of river channel ecological regulation and water purification.
Owner:北京东方利禾景观设计有限公司

Snowflake grid type grid construction method suitable for urban medium voltage distribution networks

The invention relates to a snowflake grid type grid construction method suitable for urban medium voltage distribution networks. The method comprises the following steps: selecting equipment of a snowflake grid type grid for constructing the 10kV medium voltage distribution networks; constructing a main gird of the snowflake grid type grid consisting of a feeder line cluster; connecting the equipment on the main grid; and constructing a load transfer passage to form the snowflake grid type grid. The method has the effects that each feeder line in the target grid structure formed by adopting the method is reasonably segmented and contacted, has automatic detection, isolation and network reconstruction for failures and self-healing capacity of power restoration, and can meet the power supply requirement of various types of users, so that the utilization efficiency of power distribution equipment is improved, optimal allocation of resources and optimal capital efficiency are realized, the benefit efficiency of the grid is fully developed, and thus the target grid structure is more scientific and complete. The method is easy to master and operate, simple and clear, and is convenient for actual operators to master skillfully.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1

Server remote monitoring and emergency disposal system and method

The invention discloses a server remote monitoring and emergency disposal system and method. The system and method can be used for carrying out remote monitoring on telecommunication room servers. The system comprises a plurality of client sides and a monitoring master station, and data transmission between the client sides and the monitoring master station is carried out through a TCP/IP control/ internet protocol. Each client side is provided with a data chaining module, a data monitoring module, a process monitoring module, an alarm monitoring module and an emergency disposal module. The monitoring master station is provided with a communication chaining module, a data receiving module, a data analyzing module, a data output module and an emergency control module. The disposal method includes four steps, that is, chaining request, data collection, data process and controlling of the working state of client side servers. The server remote monitoring and emergency disposal system and method not only can achieve real-time monitoring on server running data in a telecommunication room and active reporting of alarm signals, but also can achieve one-key type remote turn-off in batches when unexpected emergencies happen to the telecommunication room, and ensure integrality of the data in the servers.
Owner:STATE GRID CORP OF CHINA +1

Production method of carbide slag cement

The invention provides a production method of carbide slag cement, and belongs to the technical field of cement production, and the production method comprises the following steps: taking sandstone, iron ore and slag for burdening, feeding into a roller press for grinding, mixing the obtained discharged material with fly ash, and sorting to obtain an auxiliary material finished product; mixing the carbide slag and the auxiliary material finished product, and homogenizing in a raw material homogenizing silo; sequentially preheating and pre-decomposing the homogenized raw material, feeding into a rotary kiln for calcining to obtain clinker, feeding the clinker into a grate cooler for cooling, and feeding into a clinker warehouse for storage for later use; the clinker, the desulfurized gypsum, the slag and the fly ash are mixed and then fed into a combined grinding system to be ground, and a cement finished product is obtained. The method is used for solving the problems of consumption of a large amount of native natural resources in cement production, treatment of carbide slag and other solid wastes and pollution; according to the method, calcium carbide slag is used for replacing limestone to produce cement, the quality of a cement finished product is stable, the consumption of native resources is remarkably reduced, industrial solid waste is recycled, and the production cost is reduced.
Owner:宁夏金昱元资源循环有限公司

Method for realizing digital selective tripping protection by transmitting GOOSE signals through differential optical fibers

The invention provides a differential optical fiber transmission GOOSE signal digital selective tripping protection method. A-group outgoing line cabinets of a first traction substation transmit overcurrent starting GOOSE signals to B-group outgoing line cabinets through a first switch, then the signals are transmitted to B-group incoming cabinets of a second traction substation on the opposite side, the B-group incoming cabinets send overcurrent starting GOOSE signals to A-group incoming cabinets of the second traction substation through a second switch, and a problem that a differential protection optical fiber channel and a digital communication overcurrent protection optical fiber channel cannot be shared is effectively solved, the communication network has main and backup protection redundancy and self-healing capability, interval communication optical cables are reduced, and interval protection communication channel construction cost and the construction and maintenance workloadare greatly reduced; the defect that main protection and backup protection of the incoming and outgoing line intervals fail at the same time due to interruption of interval differential optical fibercommunication is overcome, and reliability and safety of interval protection of the power supply system are enhanced.
Owner:广州市扬新技术研究有限责任公司

Multi-functional wireless positioning search and rescue instrument

The invention discloses a multi-functional wireless positioning search and rescue instrument, comprising a control core digital signal processor (DSP), a radio frequency system control module, an antenna, an audio system control module, a sound generator and a sonic probe, wherein the control core DSP is used for calculating and processing various data signals and performing coordination and management among modules of the wireless positioning search and rescue instrument; the radio frequency system control module is connected with the control core DSP and is used for processing a radio frequency signal; the antenna is connected with the radio frequency system control module and is used for controlling feed; the audio system control module is connected with the control core DSP and is used for processing a sound wave signal; and the sound generator and the sonic probe are connected with the audio system control module. The multi-functional wireless positioning search and rescue instrument utilizes multiple mediums such as radio frequency, audio frequency, infrared for comprehensive transmission and analysis, and provides a flexible and reliable positioning mode, a communication network has self-healing capability after an accident occurs; moreover, the search and rescue instrument conforms to a protocol 802.11b, is compatible with the internet and has high extensibility and is convenient for networking.
Owner:晁顶 +4

Hysteresis control method of three-phase four-switch active filter

The invention discloses a current hysteresis control method of a three-phase four-switch-type active filter. The hysteresis control method of the three-phase four-switch-type active filter comprises the following steps: 1, firstly, three-phase reference directive current of an active filter and three-phase compensation current output actually are converted into a coordinate system with alpha-beta two-phase orthogonality by Park conversion; 2, output signals d alpha and d beta are obtained from error signals between the reference current and the actual output current after Park conversion by a hysteresis comparator; 3, a corresponding switch state table is obtained according to the topological structure of the three-phase four-switch-type active filter, and the switch action functions of two bridge arms are obtained by combining with the hysteresis comparison result and the switch state result, so that the hysteresis control of the three-phase four-switch-type active filter is realized. The hysteresis control method of the three-phase four-switch-type active filter, which is provided by the invention, is simple and reliable, is good in dynamic performance, and has favorable economic significance and market prospect.
Owner:SOUTHEAST UNIV

A passivation solution and method suitable for improving the corrosion resistance of hot-dip galvanized steel surfaces

The invention discloses a passivation solution and method applicable to an improvement in the hot-dip galvanized steel surface corrosion resistance. The passivation solution comprises the following components: 13-17 g / L of titanium sulfate, 8-10 g / L of nickel sulfate, 6-8 g / L of GPTMS, 0.05-0.15 g / L of nanometer silicon carbide, and the balance deionized water. The passivation method comprises thefollowing steps: putting the passivation solution in a passivation tank; adjusting the temperature and the pH value of the passivation solution; and taking a galvanized workpiece out of a hot-dip galvanizing bath, directly putting the galvanized workpiece in the passivation tank for passivation, and carrying out cleaning and drying. By adoption of the organic-inorganic combined composition as well as the composite passivation method of titanium salt, silane and nanoparticles, the thickness of a film layer can be increased, the uniform dense self-healing film layer can be acquired, and then the corrosion resistance can be improved; the environmental pollution can be reduced; after the passivation, the galvanized workpiece can be directly cleaned and dried; and the composition is simple, the cost is low, the passivation method is easy to operate, the practicability is very high, and the applicability is high.
Owner:NANJING INST OF TECH

Electric detonator ignition device without sensitive initiating explosive device drug

ActiveCN103322871ABurn resistanceStrong resistance to high temperature misfireAmmunition fuzesDetonatorEngineering
The invention provides an electric detonator ignition device without a sensitive initiating explosive device drug. The electric detonator ignition device comprises a shell and an inner core covered in the shell, wherein the inner core is a tantalum metal block with a spongy porous structure and is internally filled with irregular pores which are communicated with one another; a unilateral conducting layer, a negative main body layer, a graphite conducting layer and a silver conducting layer sequentially cover the surfaces of the porous structure and the geometric profile of the tantalum metal block; a positive input end penetrates through the negative main body layer and the unilateral conducting layer to be connected with the tantalum metal block; the shell is a semi-closed rectangular box body, the middle part of the front face of the shell is provided with a groove from top to bottom, and the inner core is partially exposed out of the groove; the groove aligns to a connection part of a negative end electrode pin and the silver conducting layer; insulating fillers are filled between the shell and the inner core. The ignition device disclosed by the invention is large in working temperature range, high in ignition spraying temperature, great in pressure, long in duration time, far in acting distance, high in high-temperature resistance and anti-jamming capability, small in size and safe and convenient in storage and transportation, and is suitable for application of an electronic digital detonator with automatic delaying function.
Owner:LIUZHOU CHANGHONG MACHINE MFG +1

Titanium dioxide conversion coating liquid on aluminum alloy surface and its application method

The invention relates to an aluminum alloy surface treating technology and particularly relates to an aluminum alloy surface titanium dioxide conversion coating solution and a using method thereof. The aluminum alloy surface titanium dioxide conversion coating solution is an aqueous solution which contains titanium salt and fluoride, and the pH value of the aqueous solution is regulated to 3.5-4.5 by using non-reducing acid. After being pretreated, the surface of aluminum alloy is soaked into the aluminum alloy surface titanium dioxide conversion coating solution for 1-15min, thus a conversion coating is formed on the surface of the aluminum alloy. According to the invention, the chemical conversion treatment is carried out by using titanium salt instead of chromic acid, the surface of the aluminum alloy is etched by using low-concentration fluorine ions, and titanyl sulfate or titanyl nitride is induced to hydrolyze to generate a titanium dioxide conversion coating on the surface of the aluminum alloy, wherein the titanium dioxide conversion coating is uniform in color and luster and excellent in corrosion resistance. The titanium salt is nonpoisonous, the conversion solution is simple in component, no great number of energy is consumed, and no environment hazards are caused, therefore, a clean production process is achieved.
Owner:无锡铱美特科技有限公司 +1
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