43results about How to "Distributed control" patented technology

The invention provides array optical tweezers based on multicore polarization-preserving fiber and a manufacturing method thereof. The array optical tweezers comprise the multicore polarization-preserving fiber, standard single-mode fiber and a laser light source, wherein the laser light source is connected with one end of the standard single-mode fiber, the other end of the standard single-mode fiber is connected with the multicore polarization-preserving fiber in a fusion conical pull coupling mode, and the other end of the multicore polarization-preserving fiber is manufactured into a centrum shape through fusion conical pull processing equipment. In the invention, a plurality of optical waveguide fiber cores are integrated in one fiber, thus not only saving physical space but also significantly reducing system input light power and reducing harm on particles to be captured. Meanwhile, the multicore fiber composite optical tweezers can capture particles more flexibly and accurately, and has adjustability, thus greatly improving the practicability of fiber and optical tweezers technologies. More importantly, the array optical tweezers can form a compact interference grid opticalfield array, so as to form optical potential wells at coherence enforcement points to realize functions such as filtering particles.

The invention relates to a method for preparing silicon carbide nanometer particle and a composite material thereof by evaporating solid raw materials and belongs to the technical field and application field of nanometer material. The method for preparing silicon carbide nanometer particle and the composite material thereof by evaporating solid raw materials is characterized in that automatically controlled direct-current arc plasma equipment is utilized to uniformly mix the solid raw materials which are micron silica powder and carbon powder according to a certain ratio and shape the same into blocks by compressing to obtain an anode, a graphite rod is utilized as a cathode, then the raw materials are evaporated at an atmosphere mixed by inert gas and hydrogen gas by a certain ratio to obtain single-phase silicon carbide nanometer particle or multi-phase composite material. The method for preparing silicon carbide nanometer particle and the composite material thereof by evaporating solid raw materials is simple in preparation technology, low in cost, applicable to large-scale preparation, and capable of controlling phase composition and sizes and shapes of prepared particles.

An unsupported catalyst and a preparation method therefor. The catalyst comprises an active metal oxide and an auxiliary agent embedded on the outer surface of the active metal oxide. The active metal oxide is one or more selected from oxides of the following metals: ferrum, cobalt, nickel, and copper. The auxiliary agent is one or more selected from the following elements: ferrum, cobalt, nickel, copper, rhodium, manganese, potassium, silver, calcium, magnesium, zirconium, aluminum, zinc, ruthenium, platinum, sodium, and phosphorus. The auxiliary agent is present in the form of a simple substance or an oxide.

The invention relates to a filter element for discharging mud cakes by virtue of hydraulic squeezing and extrusion for solid-liquid treatment of viscous and fine grained materials. Along the direction of squeezing force, a group of filter elements are clamped in a pressure bearing structure of a flexible pipe squeezer, wherein each filter element comprises an upper flange, a lower flange and a filter pipe unit; the upper flange comprises a raw material inlet, an upper filter chamber sealing structure and a traveling mechanism; each filter element is provided with at least one water permeation plate in a filter chamber, the front and rear surfaces of the water permeation plate are water-permeable filter surfaces, a raw material supply regulator is arranged on the upper flange, and the other end of the raw material inlet is communicated with the filter chamber by virtue of the raw material supply regulator; and the raw material supply regulator comprises at least one regulating valve. According to the filter element disclosed by the invention, because each filter element is provided with the raw material supply regulator, the distribution of raw materials in the filter chamber can be effectively controlled, thin-layer pressure filtration can be more easily met, the retention of the raw materials in the filter chamber can be avoided, and the moisture of filter cakes can be greatly reduced; and compared with a plate-and-frame filter press and a belt filter, the energy consumption of each filter element disclosed by the invention for filter chamber sealing is minimum, and the filter efficiency can be improved.

The invention discloses a rolling device and method for preparing a functionally graded material based on Hall effect. The rolling device is based on a conventional rolling mill, a coil is additionally arranged to generate a magnetic field, electrode plates are additionally arranged on a bearing seat to introduce a pulse current, a binding post is additionally arranged to measure the potential difference between two ends of a metal plate to control the condition of current distributed in a gradient mode, the upper electrode plate is connected to a positive electrode of a power supply, the lower electrode plate is connected to a negative electrode of the power supply, and the pulse current is introduced from the upper electrode plate and back to the negative electrode of the power supply after passing through an upper roller, the metal plate and a lower roller, when the pulse current passes through a plastic deformation zone of the metal plate, the pulse current is distributed in a gradient mode in the plastic deformation zone of the metal plate by the influence of the magnetic field in the broadsiding direction, the properties of the metal plate are further distributed in a gradient mode, so that the functionally graded material is prepared, the current distributed in a gradient mode is controllable, and the properties of the material are further controllable.