67results about How to "With filter effect" patented technology

The invention discloses an attitude control system and a control method of a four-rotor aircraft. Firstly, the information of attitude angles of the current aircraft is obtained, and the attitude angles include a roll angle, a pitch angle and a yaw angle; secondly, controllers for the roll angle, the pitch angle and the yaw angle are respectively designed, wherein the controller for the roll angle is the same as that for the pitch angle; and finally, after obtained control inputs of the three controllers are overlapped, a total driving signal is output, thereby driving a motor to operate, so as to control the attitude of the aircraft. A gyroscope and an accelerometer are combined, and a Kalman filter is designed in accordance with models of the attitude angles of the aircraft, so as to conjecture the attitude angles on line. Additionally, variables of the intermediate state of the system can be obtained, and a certain filtering effect is achieved.

The invention discloses a wadding wire composite filter stick for cigarettes and relates to a filter stick is compounded in the method that a wadding wire filter element and an acetate fiber filter element are wrapped in the same piece of outer ring forming paper. The wadding wire filter element made of a wadding wire material is prepared by taking paper for cigarettes as a raw material through embossing and cutting, the wrinkle depth of a wadding wire is 100 to 1000 microns, the thin wire of the wadding wire is 0.1 to 1.5 mm in width and 10 to 30 mm in length, and the density of the filter strip of the wadding wire is 1 to 3 g / cm<3>; the acetate fiber filter element or the wadding wire filter element can be individually wrapped with inner ring forming paper. The wadding wire composite filter stick can be prepared into a wadding wire composite filter tip, and the wadding wire filter element is assembled at a near cigarette tobacco end. According to the invention, the wadding wire is formed disorderly, a main stream smoke passage adopts a curvilinear style, the better filtering effect of the wadding wire composite filter stick is better than that of a conventional paper filter stick, quality control of resistance to suction and hardness are superior to that of other paper filter elements, and the application space of paper material filter sticks in the field of filter tips can be expanded.

The invention discloses an auxiliary collecting ship of an automatic floating object cleaning ship. The auxiliary collecting ship comprises a collecting ship, and is characterized in that main buoyancy tanks are symmetrically arranged on two sides of the collecting ship, the sections of the main buoyancy tanks are in the shapes of axes, a flared opening is formed in a position between the two main buoyancy tanks on a bow of the collecting ship, a guide plate is arranged at the bottom of the flared opening and is lower than a water surface, a collecting bin, a cabin and an operation bin are further sequentially arranged at the rear of the guide plate, the operation bin is arranged at a stern of the collecting ship, and a buoyancy balance bin is arranged on the lower portion of the operation bin; a slide rail is arranged at the upper edges of the inner sides of the two main buoyancy tanks, and a garbage storage frame capable of moving in the front-back directions is arranged on the slide rail. The auxiliary collecting ship with the structure has the advantages that the draught resistance can be reduced by the axe-shaped main buoyancy tanks, and most load can be borne by the columnar buoyancy tanks which are submerged in underwater portions and are in the shapes of right triangles; the buoyancy balance bin is arranged on the lower portion of the operation bin, accordingly, the problem of tilting of existing bows due to existing excessively heavy operation bins can be solved, and an integral ship hull can always keep in a horizontal state.

The invention discloses a high-voltage DC fault recovery method based on commutation voltage phase detection. According to the method, commutation voltage of each converter valve is calculated throughthree-phase voltage of a converter bus; an orthogonal quantity of each commutation voltage is constructed, amplitudes of a corresponding sine component and a cosine component are calculated by usingthe commutation voltages and the orthogonal quantities, and after filtering processing, the amplitudes of the sine component and the cosine component are divided, and arc tangent transformation is carried out to obtain an initial phase of the commutation voltages; a phase error of the phase-locked loop is calculated by using the synchronous phase outputted by the phase-locked loop and the detectedcommutation voltage initial phase, the minimum phase error amount corresponding to each commutation voltage and a trigger angle instruction value outputted by the controller are added, and a final trigger angle instruction is obtained. According to the method, the deviation between the actual trigger angle and the controller instruction under the fault can be effectively reduced, so that the effectiveness of the controller is improved, and the recovery performance of the system after the fault is improved.

The invention discloses a height estimation method for a four-rotor aircraft based on Kalman filtering. According to the method disclosed by the invention, a kinetic model for the height of a multi-rotor aircraft is established, the kinetic model is simplified into a linear model according to flight characteristics of the multi-rotor aircraft and converted into the mode of a state equation, an accelerometer is adopted to be combined with an air pressure gauge, a height value of the aircraft is speculated by using a Kalman filtering algorithm, and a certain filtering effect is played at the same time. The height estimation method applies a low-cost sensor, is not affected by changes in the weather and has the remarkable advantages of high precision, low cost, good real-time performance, wide application range and the like. The height estimation method can be applied to fixed height control for the aircraft.

The invention discloses a filter parameter calculating method and system, a device and a storage medium. The method comprises the steps of: calculating the common mode capacitance value CCM accordingto a common mode insertion loss value IL<CM><*>, an over-standard cutoff frequency value f<*> and a common mode inductance value LCM; calculating the differential mode inductance value LDM according to a differential mode insertion loss value IL<DM><*>, the over-standard cutoff frequency value f<*> and a differential mode capacitance value CDM; and designing the parameter of a filter according tothe common mode capacitance value CCM and the differential mode inductance value LDM. According to the filter parameter calculating method and system, the device and the storage medium, the common mode capacitance value and the differential mode inductance value are obtained respectively through calculation, the parameter of the filter is designed according to the common mode capacitance value andthe differential mode inductance value, the effectiveness of the parameter of the filter is improved, and the condition that the filter fails due to impedance changes caused by nonlinear devices in asystem at work is avoided.

The invention discloses a method and terminal for taking panoramic photos. The method for taking panoramic photos comprises the steps that a panoramic photo taking mode of a camera of the terminal is started; the current filter processing scheme is determined under the panoramic photo taking mode; when a photo taking action of the camera is triggered, photos obtained through the current photo taking action are processed according to the current filter processing scheme, and processed photos are obtained; if an input taking stop order is received, all obtained processed photos under the panoramic photo taking mode are subjected to panoramic splicing to generate panoramic photos. By means of the technical scheme, the function of panoramic taking is extended, and panoramic photo taking with a filter effect can be achieved.

The invention discloses an air purifying filter element which comprises a bottom framework layer, a melt-blow non-woven cloth layer, an electrostatic adsorption layer, an adsorption layer and a top framework layer. The melt-blow non-woven cloth layer, the electrostatic adsorption layer, the adsorption layer and the top framework layer are sequentially arranged on the bottom framework layer. The air purifying filter element has an excellent filtering effect and is comprehensive in filtering function, preparation cost is greatly reduced, and burdens of customers can be greatly reduced.

The invention relates to the technical field of industrial wastewater treatment, and especially relates to an industrial wastewater filtering and clarifying device. The device comprises a box body, wherein a filtering clapboard is fixedly arranged in the box body; the interior of the box body is divided into an upper part and a lower part by the filtering clapboard; the middle part of the filtering clapboard is raised, and two sides are arranged in a slope shape; two square grooves which are symmetrical about the center of the filtering clapboard are formed in the filtering clapboard; a plurality of through grooves which are distributed at equal intervals are outwards formed in the peripheral side walls of the square grooves; the through grooves penetrate through the upper face and the lower face of the filtering clapboard; the edges, located in the filtering clapboard, of the through grooves are arranged in an arc shape; two rotating shafts are arranged in the square grooves; the twoends of each rotating shaft are rotationally arranged on the inner wall of the box body through bearings; and the rotating shafts are perpendicular to the through grooves. The problem that in the prior art, vegetable leaves and peels in wastewater are wound and blocked on a fence, so that the speed of water flowing through the fence is decreased, and the filtering effect of the fence is reduced issolved, and the beneficial effect is obvious.

The invention provides a waterlogging preventive road. The waterlogging preventive road is characterized in that an integral strip-shaped filter screen which is communicated with sewers and transversely crosses a road surface is distributed on the road surface of a road. The waterlogging preventive road has the advantages that water drain effects can be realized by the integral road with the road surface, and accordingly the waterlogging preventive road is favorable for preventing large-area waterlogging phenomena.

The invention provides a method for scanning an image effective area. The method comprises the steps that S1, an image to be searched is acquired; S2, an edge coordinate in the vertical direction of the image to be searched is obtained through a vertical searching algorithm; S3, an edge coordinate in the horizontal direction of the image to be searched is obtained through a horizontal searching algorithm; S4, an area defined by the line where the edge coordinate in the vertical direction is placed and the row where the edge coordinate in the horizontal direction is placed is determined as the image effective area. According to the method for scanning the image effective area, a pipeline processing mode is used, an embedded type environment is better achieved, the used vertical / horizontal searching algorithms have a filter effect, a low-pass effect on image edge noise is achieved, edge misjudgment caused by the noise is avoided, meanwhile, the method for scanning the image effective area can be directly used for Bayer RGB images, and the calculating complexity is lowered.

The invention discloses a flat plate type dust collector. The flat plate type dust collector comprises a shell, wherein one end of the shell is provided with an air inlet, and the other end of the shell is provided with an air outlet; the air inlet and the air outlet are coaxial, and the shell is internally provided with main and subsidiary dust collecting units which are mutually perpendicular; the subsidiary dust collecting unit is horizontally arranged in the shell, and the front end of the subsidiary dust collecting unit is connected with the upper part of the shell through a front separation baffle which is perpendicular to the subsidiary dust collecting unit; the rear end of the subsidiary dust collecting unit is connected with the main dust collecting unit through a rear separation baffle, and axes of the air inlet and the air outlet of the shell are perpendicular to a windward side of the main dust collecting unit; the main and subsidiary dust collecting units both comprise dust collecting pole plates and discharge electrodes arranged outside the dust collecting pole plates, the discharge electrodes are perpendicularly uniformly provided with discharge electrode burrs, and the dust collecting pole plates are composed of dust collecting poles arranged in a clamping groove frame. The flat plate type dust collector provided by the invention has the beneficial effects that the dust collecting effect is good, a dust cleaning device is combined, the service life of each dust collecting pole plate is prolonged, and dust collecting effects of the dust collecting pole plates are guaranteed.

The invention discloses a multifunctional arc welding vision monitoring device which comprises a shell, a camera, a lens, an optical filter and a pneumatic connecting bar device. A cooling tube is arranged in a bottom plate of the shell; heat-proof white glass is arranged in a front baffle; a gas cylinder bracket is fixedly connected with the bottom of the shell; a gas cylinder is fixedly connected with the top of the gas cylinder bracket; the end part of a push rod of the gas cylinder is hinged with a filter plate; and the filter plate is connected with the gas cylinder through a connecting bar. A monitoring method is as follows: the gas cylinder is discharged by controlling a switch of a solenoid valve connected with a gas tube before welding; the filter plate is rotated to be horizontal with a push rod; the central lines of the heat-proof white glass, the lens and the camera are collinear; during welding process, the gas cylinder is charged; and the filter plate is rotated to be vertical to the push rod; the central lines of the heat-proof white glass, the optical filter, the lens and the camera are collinear; after welding, the gas cylinder is discharged; the motions before welding are repeated; and the filter plate is rotated to a position outside the shooting scope of the camera. The multifunctional arc welding vision monitoring device has simple and compact structure and low cost, and has the remote monitoring function. The monitoring method is simple, and is convenient to operate.

The invention discloses a wideband common-mode filtering apparatus. In one embodiment, the apparatus comprises a first common mode filter having a first filtering frequency band; a second common mode filter having a second filtering frequency band different from the first filtering frequency band; and a switching element configured to electrically connect the output end of the first common mode filter to the input end or output end of the second common mode filter. In another embodiment, the wideband common-mode filtering apparatus comprises a first common mode filter having a first filtering frequency band; a second common mode filter having a second filtering frequency band different from the first filtering frequency band; a third common mode filter having a third filtering frequency band different from the first filtering frequency band and the second filtering frequency band; and a switching element configured to electrically connect the output end of the first common mode filter to the input end of the second common mode filter or the input end of the third common mode filter.

The invention relates to an air purifier fan filtering wind wheel, with axle base, which is provided centrally with axis hole, and blade on the outside. There is a joint at the outside of the axle base, which has external screw thread and inner holes. There are regulation tooth at the inside of the connecting hole; the blade is consist of frame, metal spacing net and activated carbon fiber layers; the bottom of the linking frame is provided with the line-spacing axle, and the outside of line-spacing axle is equipped with positioning cap, and the bottom is provided with the regulation gear, and the regulation gear is coordinated with the regulation tooth profile. The internal thread coordinated with external screw thread providing by the positioning cap, and the blade is fixed on joint with positioning cap. The blade of the air purifier fan filtering wind wheel can be separated with axle base, and is convenient for changing, reducing cost. The blade angle can be adjusted freely, and the air quantity can be changed, at the same time, the blade has a filter effect, so that some harmful particles in air can be effectively filtered out.

The invention discloses a transverse stability control method and system for a distributed driving electric vehicle. The method comprises the steps of establishing a vehicle yaw velocity prediction model according to the historical data of the vehicle yaw velocity, the historical data of the vehicle direct yaw moment and the noise data; the model does not depend on changeable vehicle parameters and environment parameters which cannot be accurately obtained in advance; and based on the model, determining a parameter vector in the model by adopting a recursive least square method according to the current data of the yaw velocity of the vehicle; predicting the yaw velocity of the vehicle according to the parameter vector and the current data of the yaw velocity of the vehicle to obtain a predicted value of the yaw velocity of the vehicle, and estimating and updating the parameter vector in real time due to the fact that model parameters are time-varying, so that the vehicle model has self-adaptability and can be suitable for all working conditions of vehicle driving; the model has certain robustness on sensor measurement errors, has a certain filtering effect on noise in a vehicle yawvelocity measurement value, and can improve the yaw stability of a vehicle.

The invention discloses an efficient grinding method based on white carbon black production, and belongs to the field of white carbon black production.According to the efficient grinding method based on white carbon black production, during grinding work, an electric grinding block rotates to drive a sliding friction rod to generate sliding friction heat, so that the grinding efficiency is improved; meanwhile, an exhaust fan rotates to suck dust in the grinding groove into a communicating pipeline, the water solution makes contact with the dust floating in the communicating pipeline and is adsorbed, and therefore the dust floating in the air is gathered at the inner bottom end of the communicating pipeline along with falling of the water solution; according to the device, the number of suspended dust in air is reduced, white carbon black dust is not prone to being inhaled by workers, the safety of grinding work is improved, meanwhile, part of falling water solution drips on the surface of the sponge block, the sponge block has a certain filtering effect after absorbing water, and therefore the dust removal and filtering effect of the device is further improved.

The invention provides a melt-blowing type non-woven filtering material. A preparation method of the non-woven filtering material comprises the following steps that polylactic acid materials are provided and dissolved in DMF solvent, a polylactic acid spinning solution is obtained, wherein the concentration of the polylactic acid is 10-15 wt%; an electrostatic spinning method is adopted, and the polylactic acid spinning solution is taken as a raw material to prepare a polylactic acid electrostatic spinning layer; polylactic acid raw materials are provided again, and polyphenylene sulfide raw materials are provided; the polylactic acid materials are subjected to surface treatment; after treatment, the polylactic acid raw materials, the polyphenylene sulfide raw materials, nanometer titaniapowder and a processing agent are mixed to obtain a mixture; an extrusion forming method is utilized, and the mixture is extruded into modified polylactic acid particles; a melt-blowing method is utilized, and a modified polylactic acid melt-blowing fiber layer is formed on the polylactic acid electrostatic spinning layer. The material innovatively achieves that nanometer titania particles are carried in mixed fibers, and therefore the fiber material has not only a filtering effect but also the photocatalysis capacity.

The invention provides a Fenton-like oxidation method for waste resin. The method comprises the following steps: 1) mixing the radioactive waste resin having water generated in nuclear industry and acomposite catalyst, adding a certain amount of Na2SO4, and performing full stirring; and 2) controlling the reaction temperature and pH, introducing oxygen or performing aeration, adding H2O2 with a certain concentration by mass through valve control, and performing rapid degradation on the waste resin under the energization condition to make the organic components of the waste resin inorganic, wherein the catalyst is a mixture of Fe<2+> and Mn<2+> or Co<2+>. By using the oxidation method and device provided by the invention, the oxidative degradation efficiency of the waste resin can be improved in a shorter reaction time, the use amount of H2O2 during the treatment can be reduced, and the generation rate of an oxidant during the treatment can be improved; and the method has the advantages of a simple process, high efficiency and low production costs.

The invention belongs to the technical field of plastic film, and discloses an oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material. The oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material comprise an upper layer, a middle layer, and a lower layer; the upper layer is a polytetrafluoroethylene film layer, the middle layer is a polytetrafluoroethylene binding layer, and the lower layer is a filter material layer. The polytetrafluoroethylene film is mainly prepared from, by weight, 8 to 10 parts of polytetrafluoroethylene, 0.5 to 1.5 parts of an antioxidant, 0.5 to 1.5 parts of triethyl acetyl citrate, 1 to 2 parts of molybdenum disulfide, 2 to 4 parts of lead sulfate tribasic, 1 to 1.5 parts of dibasic lead phosphate, and 1 to 2 parts of polysiloxane. The polytetrafluoroethylene binding layer is mainly prepared from, by weight, 2 to 3 parts of a polytetrafluoroethylene dispersion liquid, 0.5 to 1.5 parts of an anti-aging agent, 1.5 to 2.5 parts of a foaming agent, and 0.5 to 1.5 parts of a thickening agent. The oxidation-resistant high-temperature-resistant polytetrafluoroethylene film covered filter material is high in dedusting efficiency, is long in service life, is high in oxidation resistance, and can be widely used for treatment of high temperature dust.

The invention discloses an ecological unit control method and device for urban rainwater runoff pollutants. The method includes separating garbage and suspended substances in rainwater runoff by a solid-liquid separation device; pumping the rainwater runoff into a sewage treatment tank; precipitating and decomposing harmful substances in sewage by the sewage treatment tank; discharging the purified rainwater to a water seepage layer; and finally filtering and purifying the rainwater by the water seepage layer. The device comprises the solid-liquid separation device, the sewage treatment tank and the water seepage layer, wherein the solid-liquid separation device comprises an outer barrel shell, a motor, a rotary shaft and a rotary hollow barrel. The separation of the rainwater runoff fromlarge particle solids is adopted, then the harmful substances such as phosphorus, nitrogen and the like are removed in the rainwater runoff by an aeration biological tank, and finally, phenol, cyanogen and sulfide in water are removed by a photo-oxidation reaction and a flocculation reaction of a three-stage treatment tank, so that the water seepage layer not only filters the rainwater, but also avoids soil erosion.

The invention provides a multi-stage drying device for LED production. The multi-stage drying device comprises a pipeline structure. An air blowing structure is mounted on the pipeline structure; a filtering structure is mounted at the lower end of the air blowing structure; a clamp structure is mounted at the position of the filtering structure; an auxiliary structure is mounted at the outer end of the clamp structure; a transmission structure is fixed to the outermost end of the clamp structure, the air duct is arranged to be of a C-shaped structure, the upper end and the lower end of the air duct are communicated with each other, the installed air duct can continuously circulate hot air in the drying device, and therefore the working energy consumption effect of a heating part of equipment is effectively reduced. Meanwhile, six sets of fans are directly arranged on the mounting frame, so that the overall circulating effect of the equipment is better, and the heating device is mounted at the lower ends of the fans, so that the purpose that LEDs in the equipment can be dried more quickly is achieved.

The invention provides a pair of slippers for a bathroom. The bottom surface of a sole of each slipper is provided with multiple anti-skid bulging blocks, and the sole is provided with water filtering holes. When the slippers are used in the bathroom, the multiple anti-skid bulging blocks can play a good anti-skid role, and bathing water on the sole can be filtered out due to the distribution of the water filtering holes.

The invention discloses a three-dimensional porous nickel hollow fiber electrode material, a preparation method and a battery based on the electrode. The integral electrode material is of a porous hollow tube shape and comprises a porous tubular three-dimensional substrate material and a nickel metal layer plated to the surface of the three-dimensional substrate material. By combining a membrane process with an electroless deposition process in the preparation method, the prepared electrode material is uniform and controllable in hole diameter, and the surface area of the electrode material isfar greater than that of a two-dimensional electrode material. The microorganism attachment is improved favorably, the electricity generating capacity of a microbial fuel cell is improved, and the fuel cell prepared based on the electrode material is excellent in performance.

The invention discloses an anti-impact LVT floor structure and a preparation process thereof. An LVT floor structure capable of automatically working to resist impact and a preparation process thereof are provided. The anti-impact LVT floor structure comprises a structural plate and ventilation plates, wherein a plurality of telescopic pieces are installed on the structural plate and evenly distributed in the structural plate, the tops and the bottoms of the telescopic pieces are connected with the structural plate correspondingly, the telescopic pieces are each of a hollow structure, exhaust holes and pressing plates are arranged on the telescopic pieces, and the pressing plates are matched with the exhaust holes; the structural plate and the telescopic pieces are all movably connected with the pressing plates, the number of the ventilation plates is ten, the multiple ventilation plates are evenly distributed on the front side and the rear side of the structural plate, and the ventilation plates are connected with the structural plate. The anti-impact LVT floor structure has the following beneficial effects that the purpose of automatically working to resist the impact can be achieved, smooth inlet and outlet of air inside and outside the structural plate can be completed, the filtering effect of objects inside and outside the structural plate is achieved, and limiting work can be achieved when pieces in the structural plate move downwards.

The invention discloses a control valve with a double-sealing structure, which comprises a valve body, a control module is installed at the top end of the valve body, a water inlet pipe is fixedly installed on one side of the valve body, and a drainage pipe is connected to the other side of the valve body. According to the control valve with the double-sealing structure provided by the invention, when the control module drives a valve rod and a valve element to open and close the valve, the valve rod can ascend and descend, a connecting rod drives a pull rod to ascend and descend, and the pull rod can drive the sealed door body to ascend and descend, so that a water conveying end of a sealing box shell is opened or closed, thus the joint of the valve body and the drainage pipe is closed; and in cooperation with the valve element, the device is of a double-layer sealing structure, the sealing effect of the device is improved, the situation that the valve body cannot be closed due to the fact that a valve seat cannot be sealed when the valve element breaks down is avoided, impurities in liquid can be filtered out through the sealing box shell and a filter screen installed at the drainage pipe, the device has the filtering effect, and the device is suitable for operation in more environments.

The present invention discloses a calculation method, system, equipment and storage medium for the parameters of a filter, comprising the steps of: according to the value of the common-mode insertion loss exceeding the standard cut-off frequency value f * and common mode inductance value L CM Calculate the common mode capacitor value C CM ;According to the differential mode insertion loss value exceeding the cut-off frequency value f * and differential mode capacitance C DM Calculate the differential mode inductance value L DM ; According to the common mode capacitance C CM and differential mode inductance L DM Design the parameters of the filter. The calculation method, system, equipment and storage medium of the parameters of the filter of the present invention obtain the common-mode capacitance value and the differential-mode inductance value through calculation respectively, thereby designing the parameters of the filter according to the common-mode capacitance value and the differential-mode inductance value, and improving The effectiveness of the parameters of the filter prevents the filter from failing due to impedance changes caused by nonlinear devices in the system during operation.