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 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 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 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 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.