204 results about "Strong field" patented technology

A method of forming, in or on a Si substrate, planar micro-coils with coil windings of high aspect ratio (>3) and a wide variety of geometric shapes. The micro-coils may be formed on a Si substrate and be embedded in a dielectric, or they may be formed in trenches within a Si substrate. The micro-coils may have field enhancing ferromagnetic pillars rising above the micro-coil plane, formed at positions of maximum magnetic field strength and the micro-coils may also include magnetic layers formed beneath the substrate and contacting the pillars to form a substantially closed pathway for the magnetic flux. The substrate may be thinned to membrane proportions. These micro-coils produce strong magnetic fields with strong field gradients and can be used in a wide variety of processes that involve the exertion of strong magnetic forces at small distances or the creation of magnetic wells for trapping and manipulating small particles.

The present invention is related to methods and apparatus for processing weak ferroelectric films on semiconductor substrates, including relatively large substrates, e.g., with 300 millimeter diameter. A ferroelectric film of zinc oxide (ZnO) doped with lithium (Li) and / or magnesium (Mg) is deposited on a substrate in a plasma assisted chemical vapor deposition process such as an electron cyclotron resonance chemical vapor deposition (ECR CVD) process. Zinc is introduced to a chamber through a zinc precursor in a vaporizer. Microwave energy ionizes zinc and oxygen in the chamber to a plasma, which is directed to the substrate with a relatively strong field. Electrically biased control grids control a rate of deposition of the plasma. The control grids also provide Li and / or Mg dopants for the ZnO to create the ferroelectric film. A desired ferroelectric property of the ferroelectric film can be tailored by selecting an appropriate composition of the control grids.

The invention relates to gas-phase and solid-phase flow particle online kinetic characteristic analysis technology, aiming at providing a method and a device which are used for the online measurement of intraductal gas-phase and solid-phase flow particle two-dimensional velocity field and particle size distribution. The device comprises a laser which is a low-power continuous laser of an emitting sheet laser; the laser is movably arranged on a guideway surrounding a pipeline to be measured, the plane of the guideway is vertical to the axial lead of the pipeline to be measured; a CCD camera is also movably arranged on the guideway, with the lens direction vertical to the direction of the plane of the sheet laser; and the measured position of the pipeline is installed with a transparent glass window. The technology has low cost, compact measuring system and strong field operability, and can carry out online real-time measurement on particle field two-dimensional speed, particle size distribution and particle concentration to different sectional flow fields in the pipeline.

The invention discloses a method for removing heavy metal ions in sewage by nanometer hydroxylapatite, belonging to the technical field of heavy metal sewage treatment. The method comprises the following steps: adding nanometer grade hydroxylapatite powder in waste water containing heavy metal ions, wherein, the dosage of the hydroxylapatite powder is 6-8g / L; balancing the mixture for 12-48 hours at a temperature of 23-27 DEG C; and standing the mixture to remove the heavy metal ions in the waste water. The method uses the hydroxylapatite with relatively lower economic value to treat the heavy metal sewage, has high treatment efficiency, low treatment cost, strong field operability and small environment risk, and has heavy metal ion removal rate over 90 percent under conditions that concentration of Cd, Pb or Cu ions does not exceed 60mg / L.

An implantable medical device detects a strong static magnetic field associated with an MRI imaging instrument and operates in a safekeeping operating mode. The device (10) includes an electronic circuit for the detection / stimulation of a cardiac activity (16), a weak field sensor (22) detecting the presence of a first magnetic field of a permanent magnet being located in proximity to the device, a strong field sensor (20) detecting the presence of a second magnetic field of an MRI imaging instrument during the course of an MRI examination. The electronic circuit is placed in a safekeeping operating mode protected from the magnetic field of an MRI imaging instrument when the weak field sensor detects the first magnetic field and the strong field sensor detects the second magnetic field. The strong field sensor is a sensor that is selectively activated on detection of a magnetic field by the weak field sensor.

The invention provides an MES system for engine online assembly control, which is applied to engine assembly. By setting an RFID read-write device, a return control device and an interactive display device on each workstation, data of a passing engine can be read and the state of the engine on a line can be acquired, and the processing result is written into an electronic tag. In addition, a field line and OEM equipment are managed and controlled through an MES management controller, a line controller and an OEM equipment controller. Finally, data produced in the assembly process is uploaded to an MES server. Thus, dynamic monitoring of the assembly process is realized. Compared with the prior art, the MES system of the invention has strong field data acquisition ability and assembly process control ability, is of higher efficiency.

Disclosed is a control device capable of ending strong field control in a structure that performs strong field control and square wave control on the basis of a voltage index, such as a modulation factor. A voltage waveform control unit performs PWM control when a voltage index is less than a threshold, and performs square wave control when the voltage index is equal to or greater than the threshold value. A field adjusting unit performs strong field control when the voltage index is equal to or greater than a predetermined strong field threshold value less than the square wave threshold value. A mode control unit ends the strong field control when a field adjustment command value is equal to or greater than an adjustment command threshold value determined on the basis of a target torque and a voltage / speed ratio in a direction in which field flux is strengthened.

Apparatus and method for modifying an object with electrons are provided, by which the object can be uniformly and efficiently modified with the electrons under a pressure substantially equal to atmospheric pressure even when having a relatively wide surface area to be treated. This method uses a cold-cathode electron emitter having the capability of emitting electrons from a planar electron emitting portion according to tunnel effect, and preferably comprising a pair of electrodes, and a strong field drift layer including nanocrystalline silicon disposed between the electrodes. The object is exposed to electrons emitted from the planar electron emitting portion by applying a voltage between the electrodes. It is preferred that an energy of the emitted electrons is selected from a range of 1 eV to 50 keV, and preferably 1 eV to 100 eV.

The invention provides a method and a system for remote locating on basis of at least four magnetic field sensor array planes, wherein the system comprises a location object, magnetic sensor arrays, magnetic field spatial analytical equipment and background magnetic field compensation sensors, and the location object needs to have a magnetic field, such as a capsule or a probe which contains a permanent magnet; and the magnetic sensor arrays comprise four or more than four non-fixed magnetic field sensor array planes, a Hall sensor and a magnetorsistive sensor. According to the method and the system for remote locating on the basis of at least four magnetic field sensor array planes, the target area is located among the four or more than four magnetic field sensor array planes, the strongest field intensity points of all the planes are found out, and through utilizing the solid geometry knowledge and combining with the magnetic field compensation information, the object can be remotely located.

In a field emission-type electron source (10), a strong field drift layer (6) and a surface electrode (7) consisting of a gold thin film are provided on an n-type silicon substrate (1). An ohmic electrode (2) is provided on the back surface of the n-type silicon substrate (1). A direct current voltage is applied so that the surface electrode (7) becomes positive in potential relevant to the ohmic electrode (2). In this manner, electrons injected from the ohmic electrode (2) into the strong field drift layer (6) via the n-type silicon substrate (6) drift in the strong field drift layer (6), and is emitted to the outside via the surface electrode (7). The strong field drift layer (6) has: a number of semiconductor nanocrystals (63) of nano-meter order formed partly of a semiconductor layer configuring the strong field drift layer (6); and a number of insulating films (64) each of which is formed on the surface of each of the semiconductor nanocrystals (63) and each having film thickness to an extent such that an electron tunneling phenomenon occurs.

The invention provides a micro-medium cone and nanometal grating-compounded optical probe with high spatial resolution and high sensitivity. The optical probe consists of a micro-medium cone and nanometal gratings, wherein the nanometal gratings are distributed along the outer surface of the micro-medium cone, the micro-medium cone collects incident light energy with larger aperture as far as possible and gathers the light engery towards a cone top, the gathered light energy is efficiently coupled and converted into surface plasmons by the nanometal gratings, so that the surface plasmons can be continuously compressed and focused along with a cone surface, and a nano-focused high-local area strong field is formed at the tip end of the cone. In addition, regulation and optimization of nano focus can be realized through changing and optimizing the apex angle of the micro-medium cone, the structure and parameters of the gratings, and the size of an outlet. The optical probe can be used as a probe of a near field scanning microscope, an atomic force microscope and a tip-enhanced raman spectrometer, the strong nano focus formed by the optical probe can be used as a light source of nano lithography and sub-wavelength optical communication, and has important application values in the fields of nanosensing, nanoimaging, nano lithography, sub-wavelength optical communication and the like.

The present invention relates to an apparatus and method for easily, quickly and permanently decommissioning an electronic data storage device by thoroughly exposing the device to a strong field of microwave energy thereby eliminating any possibility of retrieving data from the device. The magnetron is operated as peak power and pulsed for the time needed to assure data destruction.

The invention discloses an MSM (Metal-Semiconductor-Metal) photodetector with an improved structure and a preparation method thereof. The detector comprises an active layer, a buffering layer and an insulating substrate arranged from upside to downside in sequence, wherein an electrode is also arranged on the active layer; and the electrode is at least locally buried in the active layer; the preparation method comprises the following steps of: etching an active layer surface mask overlapped on the insulating substrate to form a buried electrode channel and filling a conductive material in the buried electrode channel to form an electrode with a set form. According to the invention, the original surface electrode structure is replaced by the electrode structure buried in the semiconductor material so that the buried electrode can form an electric field in the horizontal direction in the interior of the material so as to obtain an electric field intensity stronger than that of a surface electrode structure; and the electron moves along an approximate straight track under the stronger field intensity effect so that the photon-generated carrier drift is accelerated, the response time of the device is effectively reduced, the responsiveness of the device is improved and the preparation process is simple and controllable.

An adaptive dual mode card emulation system (in Card Emulation Mode or PICC design) within an NFC device is disclosed to solve the strong field power delivering issue and also achieve longer communication range. The NFC device may be a NFC tag or an electronic device (such as a smartphone) operated in a card emulation mode. The NFC device comprises an antenna used for wireless communication. The adaptive dual mode card emulation system comprises a passive load modulation (PLM) module, an active load modulation (ALM) module and an automatic power control (APC) module. The APC module couples to both the ALM and PLM modules and selectably enables the ALM or PLM module depending on the strength of received carrier signal sent from an NFC reader.

The invention discloses a crane with a self-dismounting over-lifting device and a dismounting method of the over-lifting device. The crane comprises a front positioning device and a rear positioning device which are respectively arranged on the front and rear of a chassis, wherein the front positioning device comprises a lifting support and an over-lifting positioning bracket arranged on the two sides of the lifting support, and the positioning bracket comprises an over-lifting positioning pin shaft; the rear positioning device comprises a supporting base and a group of supporting frames, and the supporting base is provided with a positioning hole or a guiding groove; one ends of the group of supporting frames are respectively fixedly connected with the over-lifting device, and the other ends of the group of supporting frames are provided with idler wheels; head ends of a first over-lifting arm assembly and a second over-lifting arm assembly are respectively connected with a basic arm of a lifting arm through the pin shaft. The crane and the dismounting method of the over-lifting device provided by the invention have the advantages that a device carried by the crane is utilized for rapidly finishing positioning and dismounting the basic arm of the lifting arm, the dismounting over-lifting time is greatly shortened, the inputs of manpower and material resources are reduced, meanwhile, the dismounting over-lifting required operation area is reduced, and the crane has a strong field adaptability.

The invention provides a method for producing variant potential barrier gallium nitride field effect tube, which comprises the following steps: growing a nucleation layer, an AlGaN buffer layer and a GaN channel layer on a substrate; growing an AlN isolating layer and an AlGaN barrier layer; coating a thick GaN cap layer on the AlGaN barrier layer to increase the potential-barrier height; thinning the GaN cap layer except for the part below the grate by using chlorine-based inductively coupled plasma dry corrosion process to increase the electron gas density of the underside channel and weaken the strong field peak; performing photoetching corrosion and making a source electrode and a drain electrode on the corroded AlGaN barrier layer, to reduce the ohmic contact resistance by using the thin potential barrier and high electron gas density; and making variant potential barrier field effect tube. The invention has the advantages that the grid electrode can be formed directly on the GaN cap layer without channeling, thereby significantly reducing the gate current and improving the reliability; the fabrication of field plate electrode is omitted to simplify the process, reduce the parasitic capacitance, and increase the gain; and the invention facilitates the research of millimeter wave high-frequency apparatuses.

The invention provides an automatic detector for the analysis speed of coal gas, and the automatic detector comprises an acquisition module, a master control module and an external memory module which are encapsulated into a whole, wherein the acquisition module comprises n gas flow sensors which have the same detection accuracy and different measuring ranges; each gas flow sensor is switched according to the sequence of the measuring ranges in a descending order; the n is larger than or equal to 2, and the n is a natural number; the gas flow sensors collect the gas flow from a coal sampling pot; the master control module presets the analysis speed range of the gas, obtains the real-time analysis speed of the gas and the accumulated flow of the gas and determines a working gas flow sensor; and the external memory module stores the flow of the gas, the acquisition time, the real-time analysis speed of the gas and the accumulated flow of the gas. The detector provided by the invention has the characteristics of high detection accuracy, strong field adaptability and the like, and can be widely applied to the acquisition industries of coal mines and the like.

The invention provides remote target locating method and system based on a dual-magnetic field sensor array plane. The system comprises an object required to be located, a magnetic sensor array, a magnetic field space analysis device and a background magnetic field compensation sensor. The invention provides the remote target locating method and system based on the dual-magnetic field sensor array plane; a target area is between two magnetic field sensor array planes; a point with the strongest field intensity in the two planes is found out, and then the remote target can be located by utilizing physical and mathematical knowledge combined with magnetic field compensation information. The method is not only suitable for an open environment, but also is suitable for a closed environment, such as a human digestive system, a liquid processing pipeline or some mechanical systems. According to the method, the defects of traditional remote locating are abandoned, and the method has the advantages that the location is accurate, the cost is low, the efficiency is high and the calculation is simple.

The invention discloses a single ZnO:Ga micron wire heterojunction base point light source device and a preparation method thereof, and belongs to the technical field of semiconductor optoelectronic devices. The device comprises a quartz base, a p-GaN substrate, and an AgNPs@ZnO:Ga composite system disposed above the p-GaN substrate, wherein the AgNPs@ZnO:Ga composite system includes a ZnO: Ga single micron wire, and an Ag nano particle layer which is controllably disposed on the surface of the ZnO: Ga single micron wire to form an Ag-coated ZnO:Ga micron wire composite structure. Sputtering or spin-coating the surface of the micron wire with chemically synthesized Ag nanoparticles can suppress the surface defects of ZnO and increase the effective injection rate of micron wire carriers. Further, the surface plasmons of Ag nanoparticles have extremely strong field limit and field enhancement characteristics, can limit the energy to a point, and regulate the carrier recombination area tothe same area to construct a low-dimensional point LED.

An apparatus is provided for detecting and compensating for field distortion of an underground line by mapping the field strength of a field generated by an electric current buried in the line. Signals from subterranean structures can be mapped against the location of the device. From said graph, a distortion from the expected signal can be determined, indicating the presence of interference or errors of other structures in the position of the detected structure.

The present invention provides an apparatus and method for treating and improving a target object using electrons, by which it is possible to use electrons to uniformly And effectively deal with and improve the target audience. The method uses a cold-cathode electron emitter having the ability to emit electrons from a planar electron-emitting portion according to the tunneling effect, and preferably includes a pair of electrodes and a strong field drift layer comprising nanocrystalline silicon disposed between the electrodes . A target object is exposed to electrons emitted from the planar electron emitting portion by applying a voltage between the electrodes. Preferably, the energy of the emitted electrons is selected from the range of 1 eV to 50 keV, preferably 1 eV to 100 eV.

The invention relates to a single-terminal accurate failure wave-recording and distance-measuring device facing a single space in a transformer substation, which belongs to the field of electric power systems, and comprises a signal conversion conditioning module, a traveling wave starting and data acquisition module and a data processing and man-machine interface module which are sequentially connected, wherein the traveling wave starting and data acquisition module discriminates whether a failure occurs according to voltage signals input by the signal conversion conditioning module; if the traveling wave starting and data acquisition module discriminates that a failure occurs, the traveling wave starting and data acquisition module starts failure wave recording data and transfers the failure wave recording data to the data processing and man-machine interface module; and the data processing and man-machine interface module reads the data from the traveling wave starting and data acquisition module and receives GPS signal input and switching value signal input to complete data conversion analysis and realize accurate failure distance measuring. The device is designed to face the single space structure and has simple structure and strong field application flexibility; the traveling wave and low-frequency signal acquisition are uniformly designed on one module; and the device high stability and great reduction of cost.

The invention provides an avalanche photodiode for ultraviolet detection as well as a manufacturing method and working procedure thereof. The avalanche photodiode comprises a substrate, a buffer layer, a light adsorption layer of a wide bandgap semiconductor and at least one pair of Schottky electrodes, wherein the buffer layer and the light adsorption layer of the wide bandgap semiconductor are arranged on the substrate in sequence; and the one pair of Schottky electrodes is horizontally distributed in a back-to-back mode and directly covers on the light adsorption layer of the wide bandgap semiconductor. Aiming at the problems that the quality of wide bandgap semiconductor crystals is generally low and a dual-conductive type doping is difficult to realize, a Schottky junction with high back bias voltage is utilized to realize an ultraviolet sensitive depletion region with a strong electric field; when the electric field in the depletion region reaches a critical breakdown field of the corresponding wide bandgap semiconductor, an avalanche operation can be realized; besides, a horizontal back-to-back Schottky contact structure is adopted so that the strong field in the semiconductor depletion region can be approximately perpendicular to the epitaxial growth direction of a semiconductor thin film, thus the influence of a structural defect in the material on device performances can be reduced and the reliability of a device can be improved.

The present invention is related to methods and apparatus for processing weak ferroelectric films on semiconductor substrates, including relatively large substrates, e.g., with 300 millimeter diameter. A ferroelectric film of zinc oxide (ZnO) doped with lithium (Li) and / or magnesium (Mg) is deposited on a substrate in a plasma assisted chemical vapor deposition process such as an electron cyclotron resonance chemical vapor deposition (ECR CVD) process. Zinc is introduced to a chamber through a zinc precursor in a vaporizer. Microwave energy ionizes zinc and oxygen in the chamber to a plasma, which is directed to the substrate with a relatively strong field. Electrically biased control grids control a rate of deposition of the plasma. The control grids also provide Li and / or Mg dopants for the ZnO to create the ferroelectric film. A desired ferroelectric property of the ferroelectric film can be tailored by selecting an appropriate composition of the control grids.

The invention discloses a high-power circulator. The high-power circulator comprises a metal cavity (1), a ferrite gyromagnet substrate (2) and a medium neck (3), wherein the metal cavity (1) comprises an upper cover and a base, grooves are formed in the upper cover and the base at mirror symmetry positions, the upper cover is mounted on the base, and a cavity is formed between the upper cover and the base; the ferrite gyromagnet substrate (2) is positioned inside the medium neck (3); the medium neck (3) is mounted in the cavity of the metal cavity (1) and is positioned between the groove of the upper cover and the groove of the base, so that the ferrite gyromagnet substrate (2) clings to the metal cavity (1). According to the method disclosed by the invention, the strongest field intensity is firstly concentrated on a gyromagnet substrate area through initial electrical performance design optimization, then multilayer concentric medium circular rings are loaded in the area to form the medium neck with dielectric constant of space variation, then electrical performance optimization and microdischarge simulating optimization are further carried out, and microdischarge electron orbit blocking is realized under the premise of meeting actual electrical performance requirement, so that the microdischarge threshold value power is effectively promoted.

A new type of dolphin-shaped cellular circular array super surface producing a local composite polarized light field is provided. The super-surface is a circular array-shaped micro-nano metal structure, which consists of N (N>=3 and N is a positive integer) dolphin-shaped metal cellular structures which are rotatably arranged at the equal angle to form a circular array. Each dolphin-shaped metal cellular structure binds the incident light energy to the structural surface and eventually a local focusing strong field is produced at the tip of each dolphin-shaped cellular, so as to change the structural factor m (m> 1) to adjust the enhancement factor of the focusing field. Due to the structure of the dolphin-shaped metal cellular and the circular array structure formed by the equal-angle arrangement, and the incident linearly polarized light can be converted into a spiral phase beam. The ratio of the intensity of the z-direction component Ez of the transmitted field to the intensity of the total light field E decreases with increased in the propagation distance, and the Ez phase spiral effect is getting better with increased in the propagation distance. The dolphin-shaped cellular circular array super surface can be used as optical tweezers and optical angular momentum regulators, and has an important application value in broadband optical communication, optical imaging, nano-manipulation and other fields.

Belonging to the technical field of ultrafast laser sensing, the invention discloses a device and method for detection of particulate matter distribution in flames by strong field laser. The high strength characteristics of a femtosecond filament nuclear zone in a combustion field can produce nonlinear frequency conversion for in-situ generation of third harmonic with spectrum located in an ultraviolet region. Particulate matters scatter the third harmonic in the combustion field, and the distribution information of particulate matters in the combustion field can be obtained through the strength of laterally collected scattered signals. The light scattering technology of generating third harmonic as a pumping source based on ultrafast laser filamentation in the combustion field can be applied to the field of remote in-situ monitoring of particulate matters in a combustion environment. The device and method provided by the invention have the outstanding advantages of remote detection and low loss, and are very suitable for analysis of particulate matters in a complex combustion environment like high temperature and high pressure combustion field.

Disclosed is a crescent windmill superstructure surface producing a local complex polarized light field. The substrate of the superstructure is an optical dielectric material. The superstructure surface is of a windmill nano metal structure, and is composed of multiple blades arranged at equal angles, wherein each blade is crescent. The windmill structure binds incident light energy to the superstructure surface, and produces a local strong field at the tip of each crescent blade finally. As the blades of the windmill are arranged at equal angles, incident linearly-polarized light can be converted into local complex polarization. The number of focus points, enhancement factor and local polarization state of a focus field can be regulated by changing the number of blades N and a crescent factor m. The crescent windmill superstructure surface can be used as a polarization converter or a particle manipulation waveguide, and has important application value in fields like light field polarization modulation and nano manipulation.

The invention provides a metal microcavity optical coupling terahertz quantum well photon detector, which comprises a semiconductor substrate, a metal reflective layer, a multi-quantum well structure and a metal grating, wherein the metal grating, the multi-quantum well structure and the metal reflective layer form a metal resonant microcavity with a Fabry-Perot structure, incident photons are enabled to form a resonant mode conforming to the Fabry-Perot structure in the cavity through adjusting the period of the metal grating, the width of a metal strip and the thickness of the multi-quantum well structure, and a strong field region is formed in the metal resonant microcavity, thereby improving the effective strength of incident light, and improving the response rate, the detection sensitivity and the working temperature of the device. The metal microcavity optical coupling terahertz quantum well photo detector has the advantages of simple structure, obvious effect, strong practicability, and is applicable to industrial production.