247results about How to "Overcome difficulty" patented technology

The invention belongs to the technical field of fracturing construction mechanization, and particularly provides a full-automatic liquid adding device for fracturing construction and an adding calibration method. The full-automatic liquid adding device comprises a prying frame, an engine, a transfer case, a hydraulic device, a liquid adding pump, a metering calibration tank, a liquid additive tank, a liquid supply pump and a control unit, wherein the input ends of the engine, the transfer case and the hydraulic device are sequentially connected; the output end of the hydraulic device is connected with the liquid supply pump and the liquid adding pump; the liquid supply pump is connected with an inlet of the liquid additive tank; an outlet of the liquid additive tank is sequentially connected with inlets of the metering calibration tank, the liquid adding pump and the liquid additive tank; the control unit is electrically connected with the engine, the transfer case, the hydraulic device, the liquid adding pump, the metering calibration tank, the liquid supply pump and the liquid additive tank; and the current situation that in the fracturing construction process, the liquid additive adding precision is large in adding difficulty and discontinuous is avoided, the mechanization and automation degree of fracturing construction is improved, meanwhile, the construction quality and potential safety hazards are effectively eliminated, and the construction success rate is increased.

The invention discloses a system and a method for monitoring subway tunnel construction management based on Internet of Things. The system comprises a mobile terminal device, a remote central control center, a main control unit, a plurality of data acquisition units and a plurality of Zigbee terminal nodes. The main control unit comprises a wireless communication module, a man-machine interaction module, a power supply module, a Zigbee network module and a micro-control unit core module (MCU 1 core module). Each data acquisition unit comprises a power supply module, a MCU 2 core module and a data acquisition module. After the initialization of the system is succeeded, the remote central control center is used to select either a hand-operated mode or an automatic mode to be communicated with the main control unit and the data acquisition units, and control and query instructions are sent to obtain information of various sensors in the system for monitoring the subway tunnel construction management. The system can timely monitor subway tunnel environments and construction personnel to effectively reduce probability of accidents.

The invention relates to a support vector machine inverse system composite controller based on a bearingless synchronous reluctance motor. Two expandable current hysteresis loop PWM (Pulse-Width Modulation) inverters and a bearingless synchronous reluctance motor to be controlled are used as a whole to form a composite object to be controlled; a support vector machine inverse system controller is constructed according to a mathematical model of the object to be controlled and is connected in series before the composite object to be controlled of the bearingless synchronous reluctance motor so as to realize the decoupling control between the electromagnetic torque and the radial levitation force of the motor as well as the radial levitation force in two vertical directions; on the basis, a rotating speed closed loop linear controller and two rotor position closed loop linear controllers are respectively designed for the rotating speed of the motor and the rotor positions to form a linear closed loop controller; an finally the linear closed loop controller, the support vector machine inverse system controller and two expandable current hysteresis loop PWM inverters commonly form the support vector machine inverse system composite controller for dynamically decoupling control on the bearingless synchronous reluctance motor. The control speed, the control precision and the dynamic and static performances of the system can pass parameters for adjusting the linear closed loop controller.

The invention belongs to the field of semiconductor devices and semiconductor processes, and aims to provide a method for preparing h-BN medium graphene integrated circuits on a large scale. In the method, a catalytic metal layer is subjected to photoetching by using the characteristic of selective growth of h-BN and graphene on a catalytic metal substrate, and control on the patterns of an h-BN layer and a graphene layer growing in an epitaxial way is realized, so that large-scale manufacturing of graphene field effect transistors taking the h-BN as a medium is realized. According to the method, the problems of high process difficulty, low yield and poor performance in the large-scale preparation process of graphene devices are solved, and a good basis is laid for the preparation of the graphene-based integrated circuits.

The invention provides a multi-channel cocurrent flow microfluidic chip. The chip is composed of a plurality of bypass capillary tubes and a confluence capillary tube, different spinning solutions flow through the bypass capillary tubes independently in a hydrogel wet spinning process or static spinning process, and the spinning solutions flowing out of the bypass capillary tubes are converged through the confluence capillary tube. One end of each bypass capillary tube is embedded into the confluence capillary tube to be fixed from one port of the confluence capillary tube by the same depth, and the inserting port of the confluence capillary tube is sealed. The other end of each bypass capillary tube is the inlet of the whole multi-channel cocurrent flow microfluidic chip, and the other end of the confluence capillary tube is the outlet of the whole multi-channel cocurrent flow microfluidic chip. The invention further provides a controllable spinning method for linear multi-phase heterostructure fiber based on the multi-channel cocurrent flow microfluidic chip. The technological difficulty and cost of the microfluidic chip can be lowered, the practicability and durability are improved, and various linear multi-phase heterostructure micro-nano fibers can be continuously, rapidly and conveniently manufactured.

The invention discloses an analysis method for the comprehensive energy-saving potential of a power distribution network. The method comprises the steps as follows: an index set affecting the energy-saving effect of the power distribution network is determined on the basis of a maximum potential energy-saving technology; all energy-saving technology factor sets are determined on the basis of the determined index set affecting the energy-saving effect of the power distribution network; on the basis of an analytic hierarchy process, all determined energy-saving technologies are compared, energy-saving potentials of all energy-saving measures are judged, and finally, the energy-saving technology with the maximum energy-saving potential is determined; and according to the energy-saving potentials, obtained through comparison, of different energy-saving technologies, an optimization modification scheme for forming the comprehensive energy-saving technology of the power distribution network is optimized. According to the analysis method for the comprehensive energy-saving potential of the power distribution network, the defects that the energy-saving effect is poor, the evaluation difficulty is large, and the like in the prior art can be overcome, and the advantages that the energy-saving effect is poor and the evaluation difficulty is small are realized.

The invention discloses a measuring device for mounting angles of blades of an axial flow fan. The measuring device comprises a connecting rod, a reference rod and a measuring long rod are respectively perpendicularly mounted at two ends of the connecting rod, the measuring long rod is perpendicular to a plane consisting of the reference rod and the connecting rod, an indicator is perpendicularly fixedly arranged at one end of the measuring long rod, the indicator and the reference rod are perpendicular to each other, a graduated disc is further perpendicularly mounted at one end of the measuring long rod, is abutted to the indicator and can rotate left and right around a mounting point, the bottom edge of the graduated disc is flat, and graduation values are marked on the graduated disc. During usage, the measuring device has the advantages that a measuring mode is visual, simple and reliable, measurement accuracy is improved, and the mounting angles of the blades of the axial flow fan are effectively ensured to meet designed requirements.

The invention discloses a wireless vibration and detection alarm system, which comprises a wireless vibration and detection node and a 485 gateway node. The wireless vibration and detection node comprises a vibration signal detector, a RC filter, an A/D signal sampling module, an alarm signal processing module, a radio frequency control module I, and a radio frequency transceiver I, which are connected together in turn. The alarm signal processing module is also connected with a local alarm. The 485 gateway node comprises a radio frequency transceiver II, a radio frequency control module II, a serial data communication module II, a 485 drive circuit, and a 485 interface, which are connected together in turn. The radio frequency transceiver I is wirelessly connected with the radio frequency transceiver II, thereby realizing wireless signal communication between the wireless vibration and detection node and the 485 gateway node. The invention has the advantages that: the advanced wireless sensor network technology and the intelligent routing algorithm are adopted to realize automatic networking and remote control without special setups; a full duplex multi-hop routing mode is adopted in the data communication, thereby bringing about a large network capacity and a large covering surface; the invention overcomes the defects of great difficulty in system wiring, high maintenance cost, poor invisibility, vulnerability to damage, etc. in the prior detection system, thereby being adapted to harsh field environment.

The invention discloses a pumping unit indicator diagram liquid production capacity measurement technology. The technology comprises an analysis and diagnosis module, an indicator diagram-to-pump diagram module, a liquid measure calculation module and a data management module, wherein the analysis and diagnosis module is used for calculating each level of rod indicator diagram and pump diagram of a ground indicator diagram by using a diagnostic model; the indicator diagram-to-pump diagram module is used for converting the ground indicator diagram into the pump diagram by using a wave equation; the liquid measure calculation module is used for performing liquid measure calculation based on the ground indicator diagram and production data obtained by the analysis and diagnosis module and each level of rod indicator diagram and pump diagram of the ground indicator diagram calculated by the analysis and diagnosis module; the data management module is used for controlling the liquid measure calculation module to perform liquid measure calculation based on the processing results of the analysis and diagnosis module and the indicator diagram-to-pump diagram module. According to the pumping unit indicator diagram liquid production capacity measurement technology, the defects such as high cost, large operation difficulty and low measurement accuracy in the prior art can be overcome to realize the advantages of low cost, small operation difficulty and high measurement accuracy.

A production process for an elastic knitted fabric includes the steps: (1) preparing raw materials by means of weaving gray cloth containing PET/PTT (polyethylene terephthalate/polytrimethylene terephthalate) composite fibers; (2) preshrinking the gray cloth, and differentially shrinking PTT fibers and PET fibers in the PET/PTT composite fibers by the aid of different shrinking temperature sections to form permanent three-dimensional spiral rolls and generate elastic effects; (3) dyeing the gray cloth by means of slowing down temperature rise and drop to ensure uniform heat shrinkage of the fabric; (4) softening the gray cloth by the aid of treatment fluids containing hydrophilic silicone oil softeners and moisture absorption sweat removal auxiliaries; and (5) setting the gray cloth by the aid of a setting machine with setting fluids containing hydrophilic silicone oil softeners and moisture absorption sweat removal auxiliaries. The fabric produced by the process is excellent in elasticity, elastic in recovery, soft in hand feeling, rapid in moisture absorption, fine in dryness, anti-fouling, fluffy, sunlight-resistant and chlorine-resistant, and some weaknesses and shortcomings of a common elastic fabric in production and application can be overcome.

The invention discloses an electromagnetic compatibility testing load device and a testing system of a new energy automobile electric driving system. The load device comprises a load motor, a load motor controller, a transmission device, a torque rotating speed sensor, a power supply, a first photoelectric signal converter, a second photoelectric signal converter, a monitoring device, a DC high voltage filter and a screening box; the testing system comprises the load device, an electric driving system, a low-voltage artificial network, a high-voltage artificial network, a high-voltage DC source, a DC filter, a testing table and an anechoic chamber. The load device is movable, capable of realizing high-rotating speed large torque and used for performing electromagnetic compatibility testingof the large power motor, thereby preventing an operation of importing the radiation interference from the external and preventing the load device from producing radiation interference on the external testing environment; furthermore, the testing system takes electricity from the AC power grid, and the mechanical energy of the tested motor is converted into the electric energy through the load device, and then is merged into the AC power grid, thereby realizing the cyclic utilization of the energy and reducing the experimental consumption.

The invention provides a full-mining and full-filling coal mining method with a reserved working face coal pillar. According to the invention, a working face coal pillar is reserved during mining of adjacent work surfaces and a stress concentration area is located in the area of the reserved working face coal pillar during mining, so the location of a tunnel of the adjacent work surfaces is not in the stress concentration area and the degree of stress deformation and fracture is small, thereby guaranteeing safety and convenient maintenance of the tunnel of the adjacent work surfaces, overcoming the problems of complex process, great construction difficulty and influenced filling effect of entry retaining operation and preventing waste of the coal resource; the tops of filling material tunnels of a first-mining working face and adjacent working faces are arranged to be higher than the roof of a coal seam, so crossing of transportation of a filling material and coal mining is prevented; and a local ventilator and a filling and mining hydraulic support move forward together, so smooth ventilation of the tunnel of the adjacent working faces can be guaranteed. Compared with the prior art, the full-mining and full-filling coal mining method has the advantages of no waste of the coal resource, safety, reliability, simple operation and high coal mining efficiency.

A composite suspension device for torsion bar coil springs comprises two symmetrical suspension devices with double wishbones, wherein each suspension device comprises a suspension support (5), a telescopic shock absorber (4), an upper suspension lever (3) and a lower suspension lever (3), a main flexible element employs a coil spring (1) and a supplementary element uses a torsion bar spring (9). The invention can be used for rear axles of off-road vehicles. The suspension system realizes large travel, heavy load and variable rigidity characteristic, simultaneously reduces processing difficulty of coil springs, decreases shear stress which each elastic element receives in operational process, thereby prolonging the service life of coil springs, increasing reliability of the suspension system and the entire car and decreasing processing and manufacturing costs of the suspension system.

The present invention discloses a method for monitoring and protecting lithium precipitation of a lithium ion battery. The method comprises the steps of: in a charging process of a lithium ion battery, monitoring the potential change of a negative electrode of the lithium ion battery relative to a reference electrode online; when the potential of the negative electrode is reduced to a lithium precipitation warning value relative to the potential of the reference electrode, stopping charge or changing a charge policy to achieve monitoring and protection of the lithium precipitation of the lithium ion battery. According to the scheme, the defects are overcome that the maintenance is difficult, the service life is short and the safety is poor, and the method for monitoring and protecting lithium precipitation of the lithium ion battery is small in maintenance difficulty, long in service life and good in safety.

The invention discloses a processing method and a processing device for big data and a terminal. The method comprises the following steps of collecting the big data in internet; performing structured processing on the big data; using the structured data obtained by the structured processing. According to the scheme provided by the invention, the defects of high processing difficulty, large occupied space, low utilization rate and the like in the prior art can be overcome, and beneficial effects of low processing difficulty, small occupied space and high utilization rate are realized.

The invention relates to a method for producing polyacrylonitrile-based carbon core, with high conductivity, via chemical deposition method, wherein the invention has high strength, high conductivity and controllable diameter; and the method is CVD method. The production comprises: preparing the PAN spinning solution with one-dimension high-conductivity carbon; preparing original fiber with spinning solution; crosslinking in oxygen gas, to prepare the pre-oxidized fiber; carbonizing in inertia gas, to prepare the carbonized fiber; graphitizing in inertia gas, to prepare the graphitized carbon corn. The invention can improve the conductivity of PAN-based carbon fiber; and since the anti-tension strength and flexible modulus of one-dimension high-conductivity carbon are higher than PAN-based carbon fiber, it can improve the strength of PAN-based carbon fiber to improve the treatment property of CVD method.

The invention discloses an information processing method based on an environmental benefit monitoring sensing network, and a system and a device both adopting the information processing method. The information processing method is characterized by comprising the steps as follows: S1, a central node and a network switching node or a data transceiver module of a monitoring server can be in a continuous or intermittent monitoring mode according to preset programs or manual input commands or the commands that are transmitted through a network device or an active or passive wake-up circuit after the central node and the network switching node of a background processing system are installed or called or the monitoring server starts up, and then data transmitted by a monitoring unit on a wireless sensor network acquisition node is collected; and meanwhile, in S2, the central node and the network switching node or the monitoring server can transmit the commands to the wireless sensor network acquisition node when the background processing system sends the commands according to the preset programs or the manual input commands or the commands that are transmitted through the network device or the active or passive wake-up circuit. The system and the device can direct to open-ended commands and services. The technology is suitable for being applied to WSN (Wireless Sensor Network) projects such as Sensing China, Smarter Planet and the like.

The invention discloses a device and a method for acquiring traffic information. A plurality of node devices for traffic information acquisition based on video are arranged on one side of a road one by one, and are used for acquiring the information of two-way traffic flow on the road. The adjacent node devices communicate with each other in a wireless mode so as to form a wireless sensor network. Visual fields of adjacent node devices have a covered overlap region used for providing the adjacent node devices with cooperation time and space. Through the traffic information synthesis of the adjacent node devices, a lowest-reaches node obtains the traffic information in a whole range. The node devices communicate through a Zigbee protocol, and the synthesis of overall information from the traffic information acquired by the node devices is realized through the cooperation of the adjacent node devices. The acquired traffic information comprises road flow rate, occupancy, average velocity and motion tracks of vehicles. The invention has the characteristics of flexible network structure, as well as the wide range and high real-time property of the acquired traffic information.

The invention discloses a multi-layer high gradient insulator for a high-voltage pulse power supply and a manufacturing method thereof. The multi-layer high gradient insulator is characterized in that thin conductive layers are regularly embedded in an insulator body made of an insulated material, the side surface of the insulator, which is in a certain depth, is formed by an insulated material layer and a conductive material layer, and the interior of the insulator is formed by a single insulated material. According to the invention, a conductive array is embedded in the side surface of the insulator body, the secondary electron emitting characteristic of the surface of the insulator and the surface load charge accumulation are restrained, the vacuum surface flashover characteristic of the insulator body is improved, the surface impact voltage of the insulator body is improved, the problem that the insulated material layer is not matched with the mechanical and thermal performance of the conductive material layer is solved, and the process difficulty and cost for manufacturing the multi-layer high gradient insulator are remarkably lowered.

The invention relates to a solid powdery organosilicon quaternary ammonium salt antibacterial agent, wherein silicon quaternary ammonium salt is used as the main component of the antibacterial agent; boric acid or octyl isothiazolinone is used as the synergist of the antibacterial agent; precipitated silica, the specific surface area of which is more than 150 m<2>/g is used as the carrier; and anhydrous silica gel, anhydrous calcium chloride and the like are used as the desiccants. The disadvantages of being high in investment and technical difficulty in the prior art are overcome; a solvent is unnecessary to distil off; the silicon quaternary ammonium salt is also unnecessary to react with triethanolamine or urea; the only necessary thing is to spray organosilicon quaternary ammonium salt stoste and the synergist in inorganic powder with the specific surface area of being more than 100 m<2>/g and mix uniformly; the solid powdery organosilicon quaternary ammonium salt antibacterial agent can be stored for a long time after being packaged in a sealing manner; the content of the organosilicon quaternary ammonium salt in the solid powder can be more than 30%, some 50%; and the content of the organosilicon quaternary ammonium salt is determined by the concentration of the initial organosilicon quaternary ammonium salt and the specific surface area and the use amount of carrier powder.

The invention discloses a display device, and relates to the technical field of display. The display device is used for basically achieving the curved surface display effect on the premise of not conducting physical bending. The display device comprises a plane display panel and a liquid crystal lens located in the light-emitting direction of the display panel and used for converging light rays emitted by the display panel to a central face. The central face is a vertical central line perpendicular to the display panel and passing through the display panel.

The invention relates to a pressure release type backflow preventer which comprises a water inlet ball valve, a first-stage check valve, a second-stage check valve and a water outlet ball valve, wherein a bypass draining pressure reducing valve is installed between the first-stage check valve and the second-stage check valve and comprises a valve cover and a valve body. The backflow preventer is characterized in that a piston body which can move left and right is distributed inside an inner cavity of the draining pressure reducing valve and divides the inner cavity into a left cavity and a right cavity, wherein the left cavity is communicated with a master water inlet by a channel arranged on the valve cover of the draining pressure reducing valve, and the right cavity leads a water inletto be communicated with a water outlet of the draining pressure reducing valve by a ring-shaped seat; the circumferential surface of the piston body is distributed with a ring-shaped sealing ring which is used for realizing sliding seal with the wall surface of the inner cavity, and the right side of the piston body is provided with a gasket which is matched and sealed with the ring-shaped seat; and a spring is supported between the piston body and the ring-shaped seat. Therefore, the pressure release type backflow preventer has simple and reasonable structure, and is easy to produce and assemble.

The invention provides a mineral particle model parameter calibration method based on a discrete element method. The mineral particle model parameter calibration method comprises the steps that a mineral particle model parameter constitutive model based on the discrete element method is built through physical test determination and a preliminary prepared method, and the constitutive model is usedfor being combined with stacking angle determination to carry out a physical and numerical simulation dual-directional test; on the basis of preliminary verification results, mineral particle model parameters are taken as independent variables to carry out an orthogonal numerical test, a stacking angle determination value is taken as an evaluation index to carry out regression analysis, and stacking angle physical test measurement is taken as a target value to build a regression model and determine a mineral particle model parameter optimal combination; and the determined optimal combination is verified through a numerical test again, and the mineral particle model parameters based on the discrete element method are determined finally. The technical scheme solves the problems of high difficulty in obtaining parameters and low measurement accuracy of an existing mineral particle model, and provides effective technical means for determining parameters of mineral particle numerical simulation tests.

The invention provides a maintenance method of a smart home, a device and a terminal. The method comprises a step of setting the electronic warranty card of a home appliance in the smart hole, a step of establishing an association between the electronic warranty card and the after-sale service system of the corresponding home appliance based on the set electronic warranty card, and a step of starting the appointment repair service of the electronic warranty card based on the established association when the home appliance of the smart home is failed and needs to be repaired, and realizing the maintenance service of the home appliance fault through the corresponding after-sale service system. According to the scheme of the invention, the defects of inconvenient storage, large maintenance difficulty and a poor user experience in the prior art can be overcome, and the advantages of convenient storage, small maintenance difficulty and a good user experience are realized.

The invention discloses a rapid molding method of a sodium silicate sand mould and belongs to the field of rapid casting. The rapid molding method comprises the following steps: (1), establishing a three-dimensional entity model of a sodium silicate sand mould to be molded, taking the Z axis as the molding direction, and setting molding layer thickness; (2), first, paving one layer of molding sand material, and then spraying an adhesive so as to form the current layer of outline pattern, wherein the adhesive is a mixed solution of sodium silicate and polyvinyl alcohol; (3), carrying out microwave heating on the current layer of outline pattern, and forming the current layer of sand mould outline; (4), stopping microwave heating, and lowering the work table for a height of one layer thickness along the Z axis; and (5), repeating steps (2-4) until the sodium silicate sand mould is molded. The method meets the high requirement of sodium silicate sand hardened through microwave heating on the mould, solves the problems that the surface of the sodium silicate sand mould becomes powdery due to overheating and easily absorbs moisture, and further overcomes the poor feasibility, difficult molding sand storage and difficult molding sand recycling defects of the existing micro-injection bonding sodium silicate sand rapid molding technology.

The invention discloses a method of advanced treatment of high concentration phosphorus sewage and recycling of phosphorus. The method takes sewage in chemical plants or insecticide factories and includes: a, preliminary precipitation; b, phosphorous removal through conversion of the phosphorous in the sewage into phosphine; c, inducing supernatant after treatment into a coagulating basin, adding a coagulant, nano micropowder absorbent and a flocculant into the coagulating basin to enable particles in the water to coagulate so as to obtain a mixed liquor, inducing the whole mixed liquor to a sedimentation basin for sedimentation, and performing solid-liquid separation to obtain supernatant; and d, performing nitrogen and ultraviolet combined disinfection and recycling of the purified water. According to the method, the phosphine stored in an air reservoir is converted, sludge after the sewage treatment is recycled completely, organic pollutants are removed, denitrification is achieved, and the technical gap of efficient conversion and usage of the phosphine at present is filled.

The invention discloses a composite oxidation blocking remover. The composite oxidation blocking remover comprises, by mass, 50-70% of calcium peroxide solid powder, 15-30% of polyvinylidene chloride coated organic acid microspheres, 10-18% of an oxidant assistant and 1-2% of an additive. The composite oxidation blocking remover solves the disadvantages of single main agent, limited comprehensive performances, large active release control difficulty, hidden safety troubles in storage and transportation and high construction requirements of present oxidation systems in present Bohai Sea oilfields, becomes a stable solid powder particle at normal temperature, and is safe and convenient to store and transport; and when the composite oxidation blocking remover is used in field, the composite oxidation blocking remover is directly dissolved in normal temperature according to above formula proportions, the obtained solution is extruded to stratum, the stratum is heated to rupture the polyvinylidene chloride coated organic acid microspheres, release the organic acid and activate an oxidant, and the oxidant activity is extensively released to degrade organic blocking materials. The composite oxidation blocking remover has the advantages of simplicity in construction operation, and controllable oxidation activity release.