115 results about "Distributed filtering" patented technology

The invention discloses a method for detecting a fissure on the surface of a subway tunnel. The method for detecting the fissure on the surface of the subway tunnel comprises the steps that high-speed image acquisition is conducted on the surface of a subway tunnel body by means of a visual system formed by high-speed area-array cameras; an acquired image is preprocessed to enable a binary image to be obtained; the communication area of the binary image is calculated, multi-level filtering processing is conducted based on the communication area, and a tunnel surface image with irregular noise points which are irregularly distributed filtered out is obtained; detection of the fissure on the surface of the tunnel is conducted according to the tunnel surface image with the irregular noise points which are irregularly distributed filtered out, and the size of the fissure is calculated after the fissure is detected. By the adoption of the method for detecting the fissure on the surface of the subway tunnel, a complicated noise background can be eliminated effectively, and the fissure detection accuracy is improved.

A filter mechanism comprises a plurality of coaxially arranged filter rolls each having a multitude of uniformly distributed filtering pores for retaining impurity particles in water, when it is mounted within a water filter. The filter rolls are made of a selected antirust material and therefore can be cleaned and reused once the filtering effect is deteriorating, so that the cost of maintenance and the pollution to the environment can be significantly reduced.

A gradiently distributed filter material with gradually decreased pore diameter from top to bottom for high selectivity and low filter resistance is prepared through beating plant fibres to obtain pulp, dispersing the synthetic fibres and inorganic fibres in the aqueous solution of disperser, mixing, adding wet reinforcing agent, shaping by net, dewatering, reinforcing by resin, and drying again.

A distributed filtering and sensing structure includes a base board divided into a plurality of regions, and more than ten filtering and sensing modules distributed on the respective sections, wherein the total area occupied by the filtering and sensing modules is less than one half of the total area of the regions, wherein each filtering and sensing module is used to receive a first electromagnetic wave with a first wavelength range. Each filtering and sensing module includes a non-organic filtering element for filtering the first electromagnetic wave to obtain a second electromagnetic wave with a second wavelength range; an electromagnetic sensor disposed under the non-organic filtering device for receiving the second electromagnetic wave; and an electron/hole collecting module electrically connected to the electromagnetic sensor. The second wavelength range is part of the first wavelength range. Furthermore, the distributed filtering and sensing structure can be applied on an optical device.

The invention discloses a global navigation satellite system (GNSS)/inertial/navigation system (INS) ultra-tight combination navigation apparatus and a relative navigation system thereof. On the basis of the traditional GNSS/INS ultra-tight combination navigation apparatus, the provided GNSS/INS ultra-tight combination navigation apparatus uses a distributed filtering structure. Slave filters are used for carrying out pretreatment on I,Q signals of all satellite channels; and the processed information is sent to a combined filter. Meanwhile, the GNSS/INS ultra-tight combination navigation apparatus is also applied to a relative navigation system; while the navigation state and the inertia measurement of a carrier itself are received, navigation information and a carrier phase of another carrier are also received; with a dual-different carrier phase and inertia measurement, recursion filtering resolving is carried out by using an optimal kalman filter and an optimal relative position and a relative speed between each two carriers among multiple carriers are estimated.

The invention relates to an emulsion high-pressure automatic back-flushing filtering device which comprises at least one group of filtering unit, wherein the filtering unit comprises a filtering body.The invention is characterized in that the filtering body is a flat square integral structure, the front part of the filtering body is provided with a two-way liquid inlet hole, a two-way liquid outlet hole and a two-way back-flushing drain hole which are laterally distributed, and the rear part of the filtering body is provided with at least three longitudinally distributed filtering holes. Theinvention has the advantages of no leakage, favorable rigidity, high capability of bearing high pressure, high safety, convenience in removing a filter element, compact structure and the like.

In a message delivery system, messages are carried over a network in packets. Server hosts support applications for originating and receiving messages and network interfaces. Switches interconnect the server hosts and form the packet network. Some of the switches are linked to the local server hosts. Distributed filtering/matching modules associated with the local server hosts register interests for applications on the associated local server hosts, inspect packets received over the network or from a local server host to match messages with registered interests and remove any unmatched packets from the packets. The matched messages are forwarded to the local server host for delivery to the applications. This system offers the ability to use special purpose hardware for the filtering/matching function without requiring connections to a common message broker.

The invention relates to a novel flat-sheet membrane module, which comprises filtering membranes and a support diaphragm plate for fixing the filtering membranes, wherein the support diaphragm plate is clasped with two front and back mesh plates through a frame; the front lateral surface and the back lateral surface of the support diaphragm plate are uniformly provided with densely distributed filter meshes; the two lateral surfaces are fixed with the filtering membranes in a mode of sticking or welding; membrane holes on the filtering membranes are communicated with a hollow inner cavity through the meshes on the support diaphragm plate; and a stream guiding area is arranged in the hollow inner cavity, and one end of the support diaphragm plate is provided with an effluent nozzle communicated with the stream guiding area. When the flat-sheet membrane module is applied, under the action of the negative pressure of a self-priming pump or the positive pressure of a filter hybrid hydraulic head, liquid infiltrates the surfaces of the filtering membranes, runs through the meshes of the support diaphragm plate to enter the hollow inner cavity, and then flows into an effluent trench through the stream guiding area and outflows from the outflow nozzle to realize the integral filtering process. The membrane module has the characteristics of easy machining, high utilization factor of the membrane, uniform distribution of pressure in the cavity and the like, is easy to be assembled into membrane assemblies in various forms, and is applicable in the fields of industrial filter and water treatment.

A method for constructing a radio frequency filter (100) includes depositing on a dielectric substrate (102) a plurality of layers of a conductive material (210, 216, 218, 220, 222), a dielectric material (217), and a sacrificial material (1200, 1500, 1700, 1900). The deposition is controlled to form at least one transmission line (104, 106, 108) including a shield (202) and a center conductor (204) disposed coaxially within the shield. The deposition is further controlled to form at least one distributed filter element electrically coupled to the center conductor (204), and at least one housing (402) electrically coupled to the shield. The method also includes dissolving at least one layer of the sacrificial material to form an interior channel (226) within at least one shield. The dissolving of the sacrificial material also results in the formation of a interior space within at least one housing containing the distributed filter element.

The invention provides a pipetting gun head structure with filter elements. The pipetting gun head structure solves a problem that pollution of one pipetting gun head causes cross infection on a pipetting gun and other pipetting gun heads, and the pipetting gun head structure guarantees accuracy of experimental data. The pipetting gun head structure comprises a pipetting gun head body and is characterized in that the pipetting gun head body is close to two vertically-distributed filter elements which are installed on a connection ring face of the pipetting gun in a filled mode, the two vertically-distributed filter elements comprise an upper filter element structure and a lower filter element structure, a cavity is left between the upper filter element structure and the lower filter element structure, and the upper filter element structure and the lower filter element structure are both formed by assembling a plurality of layers of high-density glass fibers.

An L-band optical amplifier has a rare earth doped gain medium including a filter distributed over a finite physical portion of the gain medium. The filter is distributed over between about 25% to substantially the entire length of the gain medium. The distributed filter substantially eliminates out-of-band light emission (C-band ASE, 1520 nm-1565 nm) and thus improves the performance of L-band amplification (1565 nm-1620 nm). Examples of distributed filters include discrete type filters such as long period gratings, or continuous type filters such as rare earth doped, twin core fibers, non-adiabatically tapered fibers and coaxial resonant ring fibers.

An optimized distributed state estimation method based on a sensor network is used in the field of control system and signal processing technology. The present invention solves the problem that existing conventional state estimation method cannot simultaneously process the state estimation of a sensor network with multiplicative noise and a non-linear interference phenomenon randomly occurring. Atthat same time, the method considers the influence of multiplicative noise and randomly occurring non-linearity on the state estimation performance, and a distributed filtering method based on Riccati-Riccati difference equation is obtained. Compared with existing conventional state estimation method of a nonlinear time-varying system, the method of the invention can control the estimation errorin a very small range, and can improve the estimation accuracy by more than 10% while being easy to solve. The invention can be applied to the field of control system and signal processing technology.

A power supply system is disclosed that includes a first interleaved power supply, a second interleaved power supply, and a common electromagnetic interference filter. The common electromagnetic interference filter is configured to provide DC power from a DC power source to both the first interleaved power supply and the second interleaved power supply. In one example, the common electromagnetic interference filter comprises a localized filter stage configured to receive DC power from the DC power source, and a distributed filter stage configured to receive DC power from the localized filter stage. The distributed filter stage includes a first set of common mode capacitors electrically connected to and physically proximate input power lines of the first interleaved power supply, and a second set of common mode capacitors electrically connected to and physically proximate input power lines of the second interleaved power supply.

The invention discloses energy-saving and environment-friendly grinding equipment for plastic recycling. The energy-saving and environment-friendly grinding equipment includes a shell, the left end ofthe upper surface of the shell is provided with a feeding hopper, the middle of the inner side face of the shell is provided with a circular plate, the upper surface of the circular plate is providedwith evenly distributed filter holes, the middle of the upper surface of the circular plate is provided with a crushing device, the upper end of the side face of a rotating shaft of the crushing device is rotatably connected with the shell through a bearing, and the lower end of the side face of the rotating shaft is rotatably connected with the upper surface of the circular plate through the bearing; and the upper end of the rotating shaft is provided with a driving device. According to the energy-saving and environment-friendly grinding equipment for plastic recycling, environment-friendlyplastics can be crushed, cut and ground, and the grinding strength can be adjusted; the environment-friendly plastics can be heated and dried, and the drying temperature can be observed and adjusted;and moisture reduction on the surfaces of the plastics is facilitated, thus the grinding effect is improved, operation is easy, and use is convenient.

A digital shunt system comprises an input signal partition cache module, a circular read and write control module, a circular judging sequence adjusting module, a weighted multiplier module, a time sequence synchronizing module, a multi-stage splicing-adding module, a distributed filter module, a position sequence arranging and computing module, a ping-pang cache module, a sequence FFT (fast Fourier transform) module and a snapshot output cache module. Weighted splicing operation is carried out in digital shunting of the digital shunt system by the circular judging method, the integral process is controlled by a clock and utilizes the circular judging structure, the output part is processed by FFT and is output in a frequency division and snapshot manner, time sequence is reinforced by the design, resource consumption is lower and signal processing is smoother.

The invention provides a method for distributing sensors in collaborative detection. Based on the optimal Kalman distributed filtering, a new information entropy incremental computation method and a global optimal distribution scheme are put forward, only the optimal solution of a distribution equation formed by new information entropy increments, serving as parameters, of all targets to all single sensors under the constraint condition is calculated, and sensors attaching to the same target under the optimal solution form a sensor group of the target. The new information entropy incremental computation method is put forward, so that the problem that a covariance matrix of a target under distributed fusion filterers is not just linearly summed through a sensor group formed by respective covariance matrixes of multiple single sensor filters and multiple single sensors is solved.