16 results about "Microwave beam" patented technology

The embodiment of the invention relates to a laser metal additive manufacturing method based on dynamic microwave assistance, and the method comprises the following steps: S1, determining technological parameters of laser additive manufacturing, and determining the size of a preset molten pool based on the technological parameters; s2, a laser beam is controlled to act on the metal material to form a liquid molten pool, meanwhile, a multi-stage microwave screening device is used for conducting spatial constraint and screening on microwave beams, and the acting range of the microwave beams is focused to the size matched with the preset molten pool size; s3, directionally applying the screened microwave beams to a liquid molten pool and a solid-liquid interface area; and S4, the screened microwave beams and the laser beams are controlled to move synchronously, and the laser beams are matched to conduct layer-by-layer stacking of materials so as to complete part forming. By realizing localization, special shape and dynamic regulation and control of a microwave energy field, inherent defects of laser are compensated from the perspective of a thermal field, and metallurgical defects are improved from the perspective of microdynamics. The invention further provides a laser metal additive manufacturing device based on dynamic microwave assistance.

A reaction furnace (1) accommodates a reaction substance (2). The microwave generator (4) generates microwave beams (5). The reaction furnace (1) is provided with an opening (3). The microwave generator (4) concentrates the microwave beam (5) at the center of the opening (3) and causes the microwave beam (5) to enter the inside of the reaction furnace (1). And the inner wall of the reaction furnace (1) reflects the microwave beam (5). And the size of the opening (3) is longer than the half-wavelength of the microwave beam (5). The area of the opening (3) is 1 / 10 or less of the area of the inner wall of the reaction furnace (1) that is not covered by the reaction substance (2).

A train control system for detecting anomalies in radar sensor measurements includes a radar sensor system (200) with microwave transceivers (210) configured to transmit microwave beams and receive reflected signals, wherein the radar sensor system (200) is configured to provide speed measurements of an object based on the reflected signals, and a module (450) operably coupled to the radar sensor system (200), wherein the module (450) is configured, via computer executable instructions and a processor (460), to execute a prediction model (452) to determine anomalies in the speed measurements in real time.

The application discloses a deformable surface for regulating W-waveband microwave beam wavefront shape, relates to the microwave diagnosis technical field of magnetic confinement nuclear fusion plasma, and comprises a mirror surface assembly which comprises a plurality of strip-shaped reflecting units arranged in sequence and is connected in series through a hinge structure between two adjacent strip-shaped reflecting units, the hinge structure allowing relative angular displacement between the adjacent reflecting units; a driving array which comprises a plurality of stepping push rod motors, a push rod of the stepping push rod motor being drivenly connected with a back side support of the mirror surface assembly through a push rod connecting piece; and a reflecting layer used for covering a reflecting side surface of the mirror surface assembly. The deformable surface for regulating W-waveband microwave beam wavefront shape can realize continuous and accurate regulation of mirror surface curvature through cooperative control of the plurality of stepping push rod motors and adapt to dynamic changes of the plasma shape.

The embodiment of the invention provides a charging method and electronic equipment, and relates to the technical field of microwave charging. The method applied to the power supply equipment comprises the following steps: determining a beam control parameter based on expected track information reported by movable target charging equipment; according to the beam control parameter, a first antenna arranged on a power supply device is controlled to transmit a microwave beam covering a first area, the first area comprises an area where an expected moving track of a second antenna arranged on the target charging device is located, and microwave signals in the microwave beam are received by the second antenna and then converted into electric energy. By applying the scheme provided by the embodiment of the invention, remote charging of the charging equipment can be realized.

The present application relates to the technical field of nuclear fusion device, disclose a kind of microwave reflection mechanism of controllable nuclear fusion device, including first support seat, reflector, drive assembly and transmission assembly, reflector is rotatably connected to first support seat, reflector is used to reflect microwave beam, the input shaft of drive assembly is connected reflector by transmission assembly, drive assembly is used to drive reflector reciprocating swing, the axis of input shaft and the rotation axis of reflector are spatially staggered arrangement, transmission assembly includes first connecting rod, second connecting rod and spline universal joint unit, opposite ends of first connecting rod are respectively connected with one end of second connecting rod and reflector rotation, the other end of second connecting rod is fixedly connected with input shaft by spline universal joint unit, first connecting rod, second connecting rod and reflector form crank rocker mechanism and second connecting rod is the shortest rod.The microwave reflection mechanism of controllable nuclear fusion device of the present application embodiment, drive assembly does not need to frequently change direction.

This invention employs a novel method of phase calibrating a very large distributed antenna. The calibration technique makes possible a new, and more practical, architecture for Solar Power Satellites. Most previous solar power satellite concepts involve the construction of unified multi-kilometer sized structures. With this invention, rather than a large unified structure, the invention may employ a collection of small free flying satellites distributed over a volume several kilometers in diameter. The invention shows how to coherently phase conjugate a microwave signal transmitted from the ground up to the constellation of satellites so that the amplified return transmission is concentrated in a desired way within a highly restricted area on the ground. The invention solves the problem of achieving the required phase precision in the return microwave beam. The invention also provides a new way to more uniformly distribute the microwave beam over a large ground based rectenna.

A microwave beam-forming antenna may include: a main reflector installed on one surface of an antenna body; an array feed horn installed on a center portion of the main reflector; a sub-reflector disposed to be spaced apart from the array feed horn on the main reflector; and a plurality of waveguide feeds respectively connected to a plurality of horn antennas arranged in the array feed horn.

The embodiment of the application relates to a kind of laser metal additive manufacturing methods based on dynamic microwave auxiliary, comprising the following steps: S1: determining the process parameters of laser additive manufacturing, and determining preset molten pool size based on process parameters;S2: control laser beam acts on metal material to form liquid molten pool, while using multistage microwave screening device to the space constraint and screening of microwave beam, the action range of microwave beam is focused to the scale matched with preset molten pool size;S3: after screening, microwave beam is directionally applied to liquid molten pool and solid-liquid interface region;S4: control after screening, microwave beam and laser beam synchronous movement, cooperate laser beam and carry out the layer-by-layer accumulation of material to complete part forming. By realizing the localized, special-shaped and dynamic control of microwave energy field, not only the inherent defects of laser are compensated from the heat field angle, but also the metallurgical defects are improved from the microscopic dynamics angle. The application also provides a kind of laser metal additive manufacturing device based on dynamic microwave auxiliary.

A process for converting a hematite-containing material to a maghemite-containing material is developed. The process comprises: producing a crushed hematite-containing material by crushing the hematite-containing material utilizing a means for grinding, obtaining a hematite-containing material with a particle size in a range of 150 µm to 500 µm by sieving the crushed hematite- containing material utilizing a means for sifting, and exposing the hematite-containing material with the particle size of 150 µm to 500 µm to a microwave energy with a frequency in a range of 890 MHz to 930 MHz for an exposing time in a range of 30 seconds to 360 seconds utilizing a means for radiating a microwave beam. An exposed thickness of the hematite-containing material with the particle size of 150 µm to 500 is a range of 3 cm to 10 cm that has a particular effect on phase changing of the hematite to the maghemite.

The present application provides a Doppler microwave detection method with determined detection boundary, which is based on segmented linear frequency modulation of excitation signal, emits microwave beams in linear frequency modulation mode, and receives echo signals corresponding to reflected echoes of the microwave beams reflected by at least one object, and generates a Doppler intermediate frequency signal corresponding to frequency and phase difference between the excitation signal and the echo signal through mixed frequency detection, so that different frequency components of the Doppler intermediate frequency signal in the frequency domain correspond to different distances between the object in the coverage space of the microwave beam and the corresponding microwave detection module, and when there is movement of the object in the space, the frequency and initial phase of the Doppler intermediate frequency signal have fluctuations in the time domain, so that the object activity in the effective detection space with determined detection boundary can be detected based on multiple limit settings of the Doppler intermediate frequency signal in frequency and initial phase.

The application provides an animal vital sign monitoring method and system based on microwave beam regulation, comprising: a positioning step: detecting and positioning the target breathing and heartbeat sensitive parts in the field of view based on a band-pass filter set; a phase shift control step: constructing a phase encoding matrix, and performing phase shift control on the transmission signal of the transmission antenna, so that the synthetic beams of multiple transmission antennas are directed to the sensitive parts positioned; a signal transceiving step: acquiring multiple echo signals and performing signal processing to obtain multi-channel baseband signals; a demodulation step: performing fine phase demodulation on the multi-channel baseband signals to extract the vital sign information of the target. The application can process the multi-channel baseband signals through the band-pass filter set, realize the detection and positioning of the animal breathing and heartbeat sensitive parts, and detect the animal vital signs through the phase encoding and beam focusing method, so as to improve the test distance, signal-to-noise ratio and measurement accuracy.

The application provides a remote sensing load channel inter-registration device and a method thereof, which comprises: a metal bucket with an opening facing upwards; a one-dimensional rotating mechanism accommodated in the metal bucket; and a remote sensing load accommodated in the metal bucket and arranged on a rotating end of the one-dimensional rotating mechanism. After data collection is completed, data processing is performed to obtain a beam pointing based on a semi-physical simulation antenna pattern, compare each channel beam pointing obtained by the remote sensing load collected data, and correct the channel inter-beam pointing of the remote sensing load according to the data comparison deviation. The application establishes a remote sensing load channel inter-registration test device under real working conditions such as full aperture and full link. The moon is used as a reference source to actually measure the microwave beam pointing of the remote sensing load, correct the channel inter-deviation, ensure the effectiveness of the microwave remote sensing data, and verify the feasibility of the channel inter-registration scheme of the on-orbit remote sensing load. The application has the effect of realizing the channel inter-registration test of the remote sensing load.

Embodiments relate to use of microwave heating and infrared thermography for assessing perfusion. The system includes a microwave source, an antenna, and a radiometer. The microwave source generates microwave radiation at a frequency that is tuned to or near a resonance frequency by the antenna to output a microwave beam. The microwave beam is caused to be incident upon tissue and is converted to heat. The heated tissue emits infrared radiation that is monitored by the radiometer. The system allows for a low-cost, efficient, and non-invasive means to assess blood perfusion without radiofrequency interference. Use of infrared thermography is accomplished by the formation of the hole in the antenna structure. Use of an array of such antennas allows the measurement of perfusion for multiple points across a region of the body. The efficiency of the system is aided by adjusting the average microwave power by means of pulse width modulation.

A probe laser beam causes molecules to transition from a ground state to an excited state. A control laser beam causes molecules in the excited state to transition to a laser-induced Rydberg state. Microwave lenses convert a microwave wavefront into respective microwave beams. The microwave beams are counter-propagated through molecules so as to create a microwave interference pattern of alternating maxima and minima. The microwave interference pattern is imposed on the probe beam as a probe transmission pattern. The propagation direction of the microwave wavefront can be determined from the translational position of the probe transmission pattern; the intensity of the microwave wavefront can be determined by the intensity difference between the minima and maxima of the probe transmission pattern.

This invention discloses a phase-fed Doppler microwave detection device with extended beam angle. By phase-fed the Doppler microwave detection device, the beam angle of the microwave beam emitted by the Doppler microwave detection device is extended, thereby increasing the radiation area of ​​the microwave beam on the corresponding target detection surface and correspondingly reducing the penetration of the microwave beam into the ground and its absorption and reflection by the ground. This reduces the cost of the Doppler microwave detection device in practical applications and improves its detection accuracy and / or anti-interference performance in practical applications.