399results about How to "Eliminate losses" patented technology

The invention discloses a fiber bragg grating detection system device and method for detecting an anchoring force of an anchor rod. The fiber bragg grating detection system device consists of a fiber bragg grating sensor array, a fiber bragg grating anchor rod dynamometer, a fiber bragg grating demodulator, an optical cable and a computer, wherein the fiber bragg grating anchor rod dynamometer mainly comprises a plurality of fiber bragg grating sensors which are uniformly arranged on an annular elastic body arm and is arranged at the end part of the anchoring end of the anchor rod; meanwhile, the fiber bragg grating sensor array is distributed on a rod body of the anchor rod; the fiber bragg grating sensor array and the fiber bragg grating anchor rod dynamometer are respectively connected with the fiber bragg grating demodulator through the optical cable; and the fiber bragg grating demodulator is connected with the computer. According to the fiber bragg grating detection system device, the real-time detection on the stress of the anchor rod can be realized and the distributed measurement can be realized. The fiber bragg grating detection system device has the advantages of simple structure, convenience in mounting, high detection speed, long-distance monitoring, repeated use and easiness in protection and maintenance, and is widely applied to tunnels and slopes dug for coal mines, metallurgical mines, water conservancy, railways, roads and defense.

The invention provides a method for trapping SO2 and CO2 on a large scale aiming at a pulverized coal furnace of a power plant. Fume generated by the pulverized coal furnace of the power plant is desulfurized by a desulfurizing tower and then enters a fluidized bed carbonation reactor; CaO in the reactor generates solid Ca(OH)2 under the action of water vapor; Ca(OH)2 particles are subjected to a carbonation reaction to trap CO2; a product CaCO3 enters a fluidized bed calcining furnace; the CaCO3 is decomposed into CaO and CO2 by using the heat generated by oxygen enriched combustion of a biomass fuel; and the CaO is introduced into the carbonation reactor for trapping the CO2 to realize the recycling. The inactive CaO is discharged from the lower part of the fluidized bed calcining furnace, and meanwhile, the calcium-based absorbent is supplemented. Part of inactive CaO discharged from the calcining furnace is introduced into a digestion reaction to form a Ca(OH)2 solution and then enters the desulfurizing tower for desulfurization, so that the respective removal of the SO2 and the CO2 can be realized and the energy consumption of the system can be reduced.

The invention discloses a millimetre wave planar antenna and an array thereof, wherein the millimetre wave planar antenna includes a metal patch, a medium substrate, a metal floor board and ground poles, the metal patch is placed on an upper surface of the medium substrate, and a lower surface of the medium substrate is fixed with an upper surface of the metal floor board; the metal patch is parallel to the upper surface of the metal floor board; the metal patch is provided with at least one pair of same first bar-shaped channels, each pair of first bar-shaped channels are distributed in bilateral symmetry form, symmetrical centre lines of each pair of bar-shaped channels are superposed, a centre line in a length direction of each first bar-shaped channel is parallel to each other, and length of each first bar-shaped channel is 1/2 of an operating wavelength; the ground poles vertically penetrate through the medium substrate, the ground poles are circularly distributed at intervals at the periphery of a region where the first bar-shaped channels are distributed, and two ends of each ground pole are respectively contacted with the metal patch and the metal floor board. The invention can reduce loss of a millimetre wave antenna, improve radiation efficiency of the millimetre wave antenna, simultaneously, guarantee work bandwidth of the antenna, and improve antenna gain.

The invention relates to the passive axial magnetic suspension bearing with the damp action, which comprises the static part and the movable part. The static part includes the static outside bearing body, the static repulsion permanent magnet, the magnetic conductor and the damp coil; the movable part is composed of the movable outside bearing body, the movable repulsion permanent magnet, the inside bearing body, the suction permanent magnet. The movable part and the static part are justified. In the static part, the magnetic conductor is equipped in the static outside bearing, the static repulsion permanent magnet is equipped on the static outside bearing, the damp coil on the magnetic conductor; in the movable part, the inside bearing is equipped in the movable outside bearing, the movable repulsion permanent magnet on the movable outside bearing, and the suction permanent magnet on the inside bearing. The polarity of the static repulsion permanent magnet is opposite to that of the movable repulsion permanent magnet and form the repulsion state.

The invention belongs to the field of plasma diagnosis computer processing, in particular to a processing method and device for multi-channel energy spectrum measurement. The processing method includes the following steps: collecting a pulse signal sent by a probe and converting it into a digital pulse signal; counting and classifying the digitized pulse signal to obtain a count spectrum; converting the count spectrum into an energy spectrum; The energy attenuation produced by the beryllium foil is reduced, and the energy spectrum obtained in the third step is restored; the energy spectrum after reduction is smoothed and peaked and fitted to obtain the electron temperature. The processing device includes a pulse signal generation module, a high-speed acquisition card, an analog/digital signal conversion module, a high-speed cache module, and a processor unit with an energy counting module and a temperature calculation module. The problems of common multi-channel energy spectrum measurement and processing methods, such as high hardware cost, strong equipment specificity, limited number of energy channels, low spatial and temporal resolution, and inability to save original signals, are solved.

The invention discloses a Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor which comprises a stator iron-core-free armature disc, a permanent magnet, a rotor disc, a shaft, a bearing and a rotor outer shell, wherein two symmetrical rotor discs are arranged at two sides of the stator iron-core-free armature disc; the stator iron-core-free armature disc and the rotor disc are installed on the shaft; the shaft is installed in the rotor outer shell through the bearing; the permanent magnet is pasted on the rotor disc, and is pasted on the inner surface of the rotor outer shell; a Halbach magnet structure with axial magnetizing and tangential magnetizing is adopted for the permanent magnet, and an enclosed magnetic circuit is formed automatically; and a soft magnetic material is placed at the middle of the permanent magnet with tangential magnetizing. According to the invention, on the basis that more permanent magnets are not used, flux density with great air clearance can be obtained, and are is in sine distribution; the output torque is high; the torque density is large; the efficiency is high; the structure is simple; the assembly is simple; and the Halbach-structure-based iron-core-free axial magnetic field brushless direct-current electromotor is suitable for relevant driving occasions with compact structures for electric automobile hub motors and the like.

The invention relates to acrylics, in particular to aqueous acrylic acid aerosol paint. The aqueous acrylic acid aerosol paint includes the chemical components (counted in weight percentage) as follows: 15 to 20wt percent of etherified-modified aqueous acrylic acid resin, 2 to 5wt percent of coloring dye, 0.1 to 1.0wt percent of flatting thickening agent, 0.1 to 0.5wt percent of foam killer, 2 to 15wt percent of latent solvents, 20 to 35wt percent of water, 40 to 45wt percent of dimethyl ether as well as 0.5 to 1.0wt percent of addition agent. The invention also provides a preparation method of the aqueous acrylic acid aerosol paint, solves the compatibility problem between a propellant and the material of an aqueous aerosol, eliminates the loss of an atmospheric ozone layer, greatly reduces the content of VOC, lightens the pollution to the environment, also eliminates the problem of the flame length for product burning, leads the whole production process to be more environment-friendly and safer as well as is beneficial to the body health of a worker.

The invention discloses an optical fiber temperature sensor for detection based on wavelength corresponding to an extreme value. The optical fiber temperature sensor determines length of a polarization maintaining fiber sensing head by calculation so that a transmitted spectrum at a transmission port of a hybrid fiber Sagnac interferometer which consists of the polarization maintaining fiber sensing head, a fiber coupler and a broadband light source has single extremum property. The wavelength corresponding to an extreme value of the transmitted spectrum also changes with ambient temperature variation, and the wavelength and the temperature acting on the fiber sensing head form a linear proportional relation T=(m/aL) Lambada m-b/a. The optical fiber temperature sensor realizes temperaturemeasurement by detecting the wavelength change corresponding to the extreme value of the transmitted spectrum. The optical fiber temperature sensor can realize temperature measurement by detecting thewavelength change corresponding to the extreme value of the transmitted spectrum, can eliminate the influence such as light source floating, light path loss and the like, and can improve the sensingsensitivity. The optical fiber temperature sensor is an all-fiber structure, and has the advantages of a small quantity of devices, easy realization, low cost, strong adaptability and strong anti-interference capability.

The invention discloses a making method for a fracture model of artificial bone, which comprises the following steps: carrying out continuous spiral CT (computed tomography) scanning on affected bone along the cross section to obtain a multi-layer image, storing according to a Dicom 3.0 standard and making out a three-dimensional reconstruction model of the bone and a fractured section by utilizing Mimics software; fractioning the model to be processed by UG (Unigraphics) software and making an appearance mold of the bone and a mark groove for the position of a fracture line of the archetypalbone by numerically-controlled mill processing; and carrying out three-dimensional printing to obtain a fractured section model, also placing at the position of the mark groove of the corresponding bone appearance mold, jointing an upper mold and a lower mold, filling polymethyl methacrylate, standing at room temperature, solidifying and taking out the fractured section model so as to obtain a specimen of the fracture model of the artificial bone. In this way, the prepared fracture model is made in one step, and the complicated processes of obtaining a bone specimen and afterwards making fracture artificially, the consumption of equipment and the worry of enhancing the cost are omitted. The condition of stress between fractured sections is comprehensively and truly reflected by an obtained fracture interface, and the assistance is provided to the treatment of clinical fracture.

The invention discloses a sendust magnetic powder core. Magnetic powder adopted for the sendust magnetic powder core comprises, by weight, 9-10% of Si, 5-6% of Al, and the balance Fe. Based on the ratio, the sendust magnetic powder core is prepared through powder pre-annealing, screening, passivation, insulation coating, compression moulding forming and heat treatment. According to the sendust magnetic powder core, the sendust magnetic powder core preparing technology is optimized, each preparation step is controlled, and excellent comprehensive performance is realized through the cooperation of all the steps.

A shaped charge casing 1 designed to be nested to reduce overall volume, which benefits storage or carriage. A lid portion 5 is connected at 8 to a body portion 9 by means of a screw thread. A shaped charge liner 12 can be positioned onto lip 11. The lid portion 5 and body portion 9 can be separated to allow filling or unpacking of explosive material.

The invention provides a rapid and unattended operation system, which comprises a head node and a plurality of child nodes, wherein the head node is connected with the child nodes through a switchboard; the head node is provided with a terminal service device; and each child node is provided with a server, and each server is provided with a network card which has a preboot execution environment read only memory (PXEROM) chip. In a limit range which can be born by the servers, an operating system can be installed in a plurality of servers simultaneously, so that the system is high in concentration degree, the installation speed is greatly increased, the phenomenon of different system configuration because the operating system is installed by different personnel is prevented, and the inconsistency of files is effectively prevented.

The invention discloses a back-contact solar battery. The back-contact solar battery comprises a silicon substrate, wherein p+ doping areas and n+ doping areas are mutually alternately distributed on the back surface of the silicon substrate, each p+ doping area is provided with a positive-electrode contact fine grid, each n+ doping area is provided with a negative-electrode contact fine grid, the back surface of the silicon substrate is further provided with a positive-electrode main grid and a negative-electrode main grid, the positions, making contact with the negative-electrode contact fine grids, of the positive-electrode main grid are provided with insulation blocking layers, and the positive-electrode main grid is located on the insulation blocking layers and connected with the positive-electrode contact fine grids. The positions, making contact with the positive-electrode contact fine grids, of the negative-electrode main grid are provided with insulation blocking layers, and the negative-electrode main grid is located on the insulation blocking layers and connected with the negative-electrode contact fine grids. The invention further discloses a manufacturing method of the back-contact solar battery. The back-contact solar battery can eliminate carrier transverse transmission loss caused by a common main grid of a back-contact solar battery in the prior art and the electrode shadowing effect of the common main grid, and the number of fill factors and the number of short-circuit currents of the back-contact solar battery are increased.

The invention discloses a distributed optical fiber sensing system, which comprises a narrow linewidth laser, a modulator, an optical isolator, an erbium-doped optical fiber amplifier, a circulator, an optical fiber grating, a sensing optical fiber, an optical detector, a microwave amplifier, a high pass filter, a power distributor, a first filter module, a first microwave detection module, a first low-frequency amplifier, a second filter module, a second microwave detection module, a second low-frequency amplifier, a data acquisition card and a computer. Distributed optical fiber vibration or sound signal measurement is realized, dynamic large-phase signal measurement is effectively realized, a phase cancellation and fading problem can be eliminated, a high-speed data acquisition device with a GS/s sampling rate is not needed, the cost is reduced, the response time is not influenced, the strength and the frequency shift changes of Brillouin scattering light can be measured respectively on the premise of eliminating instability of a laser source and line loss, and temperature changes and the strain are further obtained.

The DC convertor is composed of DC power supply, first inversion bridge arm, second bridge arm, resonant inductance, isolating transformer, rectifying and filtering circuit, current transformer, and clipper circuit. The added current transformer and clipper circuit eliminates voltage surge and voltage pike caused by backward recovery of rectifying tube, reduces voltage stress of rectifying tube, and eliminates waste caused by backward recovery of rectifying tube. Since voltage stress of clamp diode is smaller, tube with good capability can be selected to eliminate influence on circuit caused by stray parameter of clamp diode. Moreover, Comparing with mode that a clamp diode is placed at primary side of transformer to clip voltage at primary side, the clipper circuit clips voltage at secondary side of transformer in the invention can eliminate voltage surge and voltage pike of rectifier diode caused by leakage inductance of transformer.