177 results about "Pulse microwave" patented technology

An external stimuli is provided that alerts animals to danger and/or repels the animals from certain areas. More specifically, the system and method of the present invention uses an external stimuli, such as, for example, pulsing microwaves, vibration or supersonic sound waves, in order to alert birds or other animals of danger and/or repel these same birds or animals from specific areas. These produced external stimuli may provide a reversible unpleasant sensation to the birds and other animals so that they will not only be repelled from a specific area, such as an airport, but also will avoid returning to such area. One such unpleasant sensation that is virtually harmless to the birds and other animals is the sensation of dizziness.

There is described an ultraviolet light source comprising an ultraviolet bulb, a pulsed microwave energy source for exciting said ultraviolet bulb and an enclosure for enclosing the ultraviolet lamp, the enclosure comprising an optically transparent waveguide. The optically transparent waveguide wholly surrounds the bulb. The ultraviolet light source is particularly suitable for use in the sterilisation of substances; the promotion of photochemical reactions; and the promotion of molecular dissociation in liquids.

The invention provides a method for improving the brittleness of crispy fruit slices and preventing the adhesion through combining high vacuum with negative pressure pulse microwave drying, and belongs to the technical field of fruit and vegetable food processing. According to the method, the processes for processing the high-vacuum drying crispy fruit slices comprise the steps of fresh fruit selection, cleaning, peeling, denucleation, slicing, color protection, brittleness protection, adhesion prevention, high-vacuum drying, negative pressure pulse microwave later-period short-time drying and package. A recipe adopted in the brittleness protection work procedure comprises 0.01 percent to 6.0 percent of white granulated sugar, 0.01 percent to 5.0 percent of calcium chloride, 0.01 percent to 2.0 percent of pectin and 0.01 percent to 2.0 percent of xanthan gum, the materials are subjected to vacuum osmosis in the combined water solution, and then, the negative-pressure pulse miciowave later-stage short-time drying is combined. A recipe adopted in the adhesion prevention work procedure comprises 0.01 percent to 10 percent of maltodextrin and 0.01 percent to 10 percent of lactose, the materials are soaked for 10 to 300 minutes in combined water solution, and then, the later-stage short-time microwave surface drying is combined. The improved crispy slices have the advantages that the mouth feeling is crispy, the nutrition content is high, the moisture absorption of products during the eating is avoided, and the eating time of the high-vacuum drying crispy fruit slice product is prolonged.

The microwave hemorrhagic stroke detector includes a low power pulsed microwave transmitter with a broad-band antenna for producing a directional beam of microwaves, an index of refraction matching cap placed over the patients head, and an array of broad-band microwave receivers with collection antennae. The system of microwave transmitter and receivers are scanned around, and can also be positioned up and down the axis of the patients head. The microwave hemorrhagic stroke detector is a completely non-invasive device designed to detect and localize blood pooling and clots or to measure blood flow within the head or body. The device is based on low power pulsed microwave technology combined with specialized antennas and tomographic methods. The system can be used for rapid, non-invasive detection of blood pooling such as occurs with hemorrhagic stoke in human or animal patients as well as for the detection of hemorrhage within a patient's body.

The invention discloses a method for preparing blueberry fruit wine and belongs to the technical field of deep-processing of agricultural products. The method comprises the following steps: juicing blueberries, performing instantaneous high-power pulse microwave treatment and composite pectinase enzymolysis, inoculating brewer's yeast, fermenting at controlled temperature, performing vacuum drum datomite filtration, composite flocculation clarification treatment, diatomite filtering, microfiltration and pulse microwave treatment and filling. According to the method, instantaneous high-power pulse microwave treatment is performed before fermentation, infectious microbes in the blueberry juice are killed under normal temperature conditions, polyphenol oxidase in the blueberry juice is passivated, sulfur dioxide is not required to be added, and pure fermentation is performed through inoculation of a good fermentation agent, so that high-quality blueberry fruit wine is produced, and the economic value of blueberries is obviously improved.

A surgical and dental instrument sterilizer is described. Liquid water is rapidly vaporized by microwave heating and steam is generated to attain a steam pressure of approximately 47 psi and a temperature of approximately 135° C. in the region of the articles to be sterilized. Micron-size water-droplets are intermittently sprayed onto the articles which are arranged on a tray, from both the top and from underneath thereof so as to thoroughly wet the surfaces. A 30-90 s duration of droplet spray is followed by pulsed microwave irradiation of the top and underneath surfaces for a similar period, as an example; this is followed by a plurality of spray/microwave cycles. Sterilizing conditions in the sterilizer chamber are maintained in the presence of the water spray/microwave flashing cycles since introducing small aliquots of water will not affect the desired sterilizing condition provided by superheated steam augmented by microwave radiation necessary to kill microbes including spores; however arcing from metal instruments when subjected to microwave radiation is substantially reduced.

The invention discloses an inertia measurement device and method based on a diamond NV color center under a high magnetic field. The method adopts a diamond material containing a high-concentration nitrogen-vacancy (NV) color center as a sensitive element, laser and the about 500 gauss of high magnetic field are used for achieving the polarization of nuclear angular momentum, and pulse laser and pulse microwave are used for achieving the operation, control and detection of the diamond NV color center, thereby achieving the measurement of inertial rotation. Compared with the inertial rotation measurement by using electron spin, the measurement sensitivity is significantly improved through nuclear polarization, it is of great value for the development of an inertial measurement system basedon a quantum theory, and the device serves for various fields in the future, especially for civil miniaturized inertial navigation and attitude determination systems.

The invention discloses an early-stage breast cancer nondestructive screening and imaging system, which mainly comprises circular gears, an annular ultrasonic array, a bowl-shaped annular shell, ultrasonic coupling liquid, a protective film, a horn antenna, a waveguide tube, a microwave generator, a frequency divider, a data acquisition circuit, a preprocessing circuit, a stepping motor, a driver, a digital I/O card, a computer and a display. The working process of the system is that: detected mammary glands are radiated by pulse microwaves to generate thermo-acoustic signals which are received by the annular ultrasonic array and are finally acquired by the computer; the driver drives the annular ultrasonic array to rotate to a next position around detected biological tissues; and the steps of acquisition and rotation are repeated until the thermo-acoustic signals of enough positions are received, and the computer re-establishes three-dimensional thermo-acoustic images of the detectedtissues. The early-stage breast cancer nondestructive screening and imaging system can quickly and nondestructively realize the three-dimensional thermo-acoustic imaging of the detected mammary glands to provide one of important bases for the diagnosis of early-stage breast cancer.

The invention relates to a PtM/C electrocatalyst for a fuel cell. The PtM/C electrocatalyst comprises the following components by mass percent: 18.16-36.52% of active components, 1.74-3.68% of auxiliary agents and the balance being a conductive carrier. The PtM/C electrocatalyst is prepared by the steps of feeding precursors of the active components and precursors of the auxiliary agents into a mixed suspension liquid of the conductive carrier and a reducing agent in one step; loading metal Pt and M onto the conductive carrier by adopting a pulse microwave-assisted chemical reduction method; and after that, precipitating, filtering, washing and carrying out vacuum drying to obtain the PtM/C electrocatalyst. Compared with the prior art, the preparation method is simple; the prepared PtM/C electrocatalyst is uniform in particle distribution, small in size and high in catalytic activity of oxygen reduction reaction, and can be used in the field of the fuel cell.

A UWB RF detector employs a pulsed self-oscillating mixer (SOM) and an output integrator to provide low-noise preamplification, mixing and sampling. The SOM produces short-burst, microwave self-oscillations that are phase-locked to a clock. The self-oscillations are used for mixing. The SOM can also radiate UWB RF pulses. A one-transistor SOM can simultaneously implement both a UWB emitter and a UWB detector in a radar transceiver. A control loop can stabilize the self-oscillations at nanowatt levels. Nanowatt UWB radars and radios can be realized, thereby opening new spectral bands beyond those formally designated for UWB operation.

The invention relates to a microwave-assisted enzymatic extraction process of tea polyphenol, wherein the process includes the steps of removing impurities from fresh tea, cleaning and crushing the tea, blending a solution and adding an enzyme, performing vacuum-microwave treatment, performing centrifugal separation, performing resin adsorption, performing secondary elution, vacuum-concentration to an eluant and freeze-drying the concentrated liquid to obtain tea polyphenol dry powder. The microwave is a pulse microwave. By means of strict control of pulse microwave dosage, pulse width and pulse period, biological effects of microwave are fully achieved, so that the activities of the enzymes are activated and the object of quickly and high-effectively extracting the tea polyphenol is achieved. The process is high in efficiency, is less in energy consumption and is less in extraction time. The tea polyphenol is high in purity and bio-activity, is green and environment-friendly, and is natural and pollution-free.

The invention provides an ultra-fast electronic diffraction system based on an X-waveband photocathode microwave electron gun, belonging to the technical field of ultra-fast electronic diffraction; the ultra-fast electronic diffraction system is characterized in that the X-waveband photocathode microwave electron gun replaces a DC high-voltage photocathode microwave electron gun in the existing Kev ultra-fast electronic diffraction system and is used as an electron source; and correspondingly, an X-waveband pulse microwave power unit is adopted and high-quality electron beams ranging from 0.5MeV to 1.5MeV is easily obtained, thus leading the electron number in each electron beam bunch to be improved to 2 to 3 magnitude and correspondingly saving a plurality of samples and testing time of the diffraction samples to be researched, thereby leading the obtaining of single diffraction sample spot to be possible.

The invention relates to a power supply for achieving pulse microwave output employing a magnetron and a control method of the power supply. The power supply for achieving the pulse microwave output employing the 2.45GHz magnetron comprises a filament power supply, an anode negative high-voltage power supply and a controller. Output of the anode-supply high-voltage power supply of the 2.45GHz magnetron at a certain pulse repetition frequency and a modulated duty ratio is achieved under the condition of not changing heat-sink cooling of the anode, so that accurate and controllable microwave generation time and the maximal output power are achieved; and synthesis of output power multi-tubes of the 2.45GHz magnetron is achieved through control to the requirements of industrial high-power microwave output.

The invention relates to a device for crushing and grinding uranium ores through assistance of 915MHz pulse microwave irradiation and a control method. The device comprises five main parts of: a 915MHz microwave source generator, a microwave circulator, a water load, wave guide tubes and a microwave resonant heating cavity. After the uranium ores are irradiated by high-power pulse microwave emitted by the device, the mechanical strength of the uranium ores is reduced, the dissociation degree of the uranium ores is increased, and the crushing and the grinding of the uranium ores and the leaching of uranium minerals are facilitated. Compared with traditional continuous microwave irradiation, the pulse microwave irradiation is lower in consumption and better in assistance of the crushing and grinding effect, and can effectively prevent high-temperature sintering.

The invention discloses a titanium dioxide coated lithium nickel cobalt manganate cathode material, the thickness of the titanium dioxide layer coated on the surface of the lithium nickel cobalt manganate powder is 10 nm to 1 mum, Lithium nickel cobalt manganate powder was deposited on the surface of lithium nickel cobalt manganate powder by pulsed microwave excitation, and titanium dioxide coatedlithium nickel cobalt manganate cathode material was prepared. The titanium dioxide coating layer formed on the surface of the lithium nickel cobalt manganate powder has good uniformity, controllablethickness, convenient operation and implementation of the preparation method, low coating temperature required in the preparation process, short time and easy industrial production; The cathode material prepared by the invention brings excellent electrochemical cycling performance to the lithium ion battery, and the capacity retention rate is greatly improved.

A method for the detection of mercury or other heavy metals in a gas stream comprises the steps of: providing a pulsed microwave power supply;

supplying a microwave generator with power from the pulsed microwave power supply; using the microwave generator to power a short circuited waveguide to create a plasma torch located in a chamber; feeding a sample of the gas stream to the plasma torch; using the plasma torch to transform oxidized elements in the gas stream to atomic elements; and analyzing by atomic fluorescence of the gas stream having the atomic elements with an excitation lamp for the presence of at least one metal.

The invention provides a method for preparing high-quality reduced graphene through high-energy-pulse microwave rapid recovery. The method comprises the main steps that crystalline flake graphite is added into fuming nitric acid under ice-water bath, hydrogen peroxide is added for a reaction for a certain time, washing and drying are conducted, and expanded graphite is obtained through microwave puffing; the expanded graphite and potassium permanganate are sequentially added in a mixed-acid system of 0-DEG C concentrated sulfuric acid and phosphoric acid, the strong oxidizing performance of the potassium permanganate is used, and the graphene is oxidized into graphene oxide under the low temperature of 0 DEG C; the graphene oxide is placed in a tube furnace to be subjected to insulation treatment, and pre-reduced graphene oxide powder is obtained; and finally, the pre-reduced graphene oxide powder is placed in a high-energy-pulse microwave cavity, microwave is opened, and a high-quality reduced graphene product is obtained. According to the high-quality reduced graphene prepared through the method, the lamellar structure is complete, the reduced graphene finally obtained through high-energy-pulse microwave rapid recovery is high in quality, and a good foundation is provided for preparation of graphene oxide, and graphene-based nanocomposite materials.

The invention discloses a rice processing method with essential oil mist spraying and pulse microwave action. The rice processing method comprises the following steps of preliminary screening, impurity removal, drying, dehumidification, husking shelling, rice milling, atomization and wetting and then drying, milling, polishing, color sorting, grading, packaging and storage and a pulse microwave anti-insect and anti-mould process, specifically, harvested rice is screened, firstly, a screening machine with appropriate sieve meshes is selected for screening out impurities with a different size from grains according to the different widths and thicknesses of rice and the impurities, then fine selection is performed, the rice is separated from the impurities according to the difference in lengths of the rice and the impurities, then air separation is continued to be performed, and the light impurities (such as chaff, rice straws and false grains) are taken away by wind force to be separatedfrom the rice in ascending or horizontal airflow. The rice processing method has good antibacterial and delay aging effects, can inhibit generation of colonies and formation of fatty acids in the rice and has a high fatality rate to pests and aspergillus parasiticus, and pulse microwave treatment reduces the hatching rate of pest eggs and reduces the viability of the pests.

The invention provides a method for resource recycling of phosphorus in breeding waste. The method comprises the following steps that (1) pulse ultrasonic treatment is conducted on the breeding waste; (2) the breeding waste treated in the step (1) is introduced into a wet type chemical oxygenizer and oxidized under the action of an oxidizing agent; (3) a magnesium solution and a pH value regulating agent are added into supernate of the breeding waste treated in the step (2), and pulse microwaves are applied to the mixed solution; (4) the mixed solution treated in the step (3) is introduced into a crystallizing bed, bird dung crystal mud and supernate are obtained after the mixed solution is crystallized, and the bird dung crystal mud is collected; and (5) the supernate obtained in the step (4) is introduced into an adsorption column, and ferric oxide hydrate-carried charcoal after adsorption is collected with ferric oxide hydrate-carried charcoal as an adsorbent. According to the method, the pulse ultrasonic and advanced oxidation coupling technique is adopted, and the phosphorus release rate and the organophosphorus conversion rate are high; the bird dung crystal and ferric oxide hydrate-carried charcoal adsorption coupling technique is adopted, and thus phosphorus loss rate is low.

The invention relates to a police high-power pulse microwave emission vehicle forced stop device which comprises an unmanned aerial vehicle and a microwave emitter carried on the unmanned aerial vehicle. The unmanned aerial vehicle is provided with a camera holder and a camera. The microwave emitter comprises a lithium battery pack, a control circuit and a pulse microwave emitting circuit. The invention provides a police high-power pulse microwave emission vehicle forced stopping device. The police high-power pulse microwave emission vehicle forced stopping device is composed of a micro-processing control circuit and a high-power pulse microwave emission circuit. The miniaturized police high-power pulse microwave emission vehicle forced stopping device can be installed on an unmanned aerial vehicle, a police motorcycle and a police automobile. Under the non-contact (within a certain distance) and non-fatal conditions, high-power pulse microwaves are emitted to a target vehicle, so thatan ignition system of a vehicle engine is disordered, the engine is shut down, the vehicle is forced to stop due to power loss, the social management and control capacity of the government is improved, and the public safety level of China is improved.