56results about How to "Increase radiant energy" patented technology

Gamma radiation imaging system for non-destructive inspection of the luggage contains a DR sub-system, which obtains the projected image of the luggage by translationally scanning, and a CT sub-system, which obtains the tornograph image of the luggage by rotating scanning. Said DR sub-system includes a fixed gantry, a conveyor system, a radiation source mounted on the fixed gantry, front and back collimators, and the array detector. Said CT sub-system includes a rotating gantry, a conveyor system, a radiation source mounted on the rotating gantry, front and back collimators, and the array detector, wherein, the radiation source in said CT sub-system is ¹⁹²Ir or ⁷⁵Se radioactive isotope gamma source with high specific activity. Said gamma source is enclosed in a shield chamber with a projecting opening. The shield chamber is mounted on said rotating gantry. Said array detector is adapted for detecting gamma ray of ¹⁹²Ir or ⁷⁵Se radioactive isotope; The radiation source in said DR sub-system is ¹⁹²Ir or ⁷⁵Se radioactive isotope gamma source with high specific activity, said gamma source is enclosed in a shield chamber with a projecting opening. The shield chamber is mounted on said fixed gantry. Said array detector is adapted for detecting gamma ray of ¹⁹²Ir or ⁷⁵Se radioactive isotope.

An optical pattern generator uses a rotating component that includes a number of deflection sectors containing optical elements. Each sector deflects an incident optical beam by a substantially constant angle although this angle may vary from one sector to the next. The constant deflection angle is achieved by symmetry within the deflection sector, specifically gut-ray symmetry. The rotating component may be combined with an imaging group that produces, for example, image points, spots, or lines displaced along a line locus. The image spots can also be displaced to either side of a line, for example by introducing a tilt in the orthogonal direction or by introducing light beams at various angles to the plane of symmetry.

The embodiment of the invention discloses and electronic device. The electronic device comprises a first antenna branch knot, a second antenna branch knot, a feed source and a grounding circuit; the first antenna branch knot is connected with the second antenna branch knot; the feed source is electrically connected with the connection point of the first antenna branch knot and the second antenna branch knot through a feeder line and is used for feeding excitation signals into the first antenna branch knot and the second antenna branch knot; the first end of the grounding circuit is connected with the feeder line, and the second end of the grounding circuit is grounded; the feed source, the first antenna branch knot and the grounding circuit form a first antenna, the feed source, the second antenna branch knot and the grounding circuit form a second antenna, and the first antenna and the second antenna have the same main radiation mode.

The invention discloses a novel leaky cable for an Internet of things application. The novel leaky cable comprises an inner conductor, a dielectric layer, an outer conductor, an insulating protective layer which are orderly arranged from an inner layer to an outer layer. The outer conductor is provided with continuous slots along an axial direction, and two sides of the continuous slots are provided with periodic slots. The continuous slots are wavy bend slots or straight line type slots, and the periodic slots at two sides of the continuous slots are mutually staggered. The periodic slots are single triangular slots or combined slots of multiple triangular slots, and the periodic slots are L-shaped or U-shaped slots. The novel leaky cable is suitable for an Internet of things RFID sensing application and has high coupling loss. As an ultra-high frequency (UHF) networking antenna, the high coupling loss leaky coaxial cable has the advantages that large radiation energy can be provided, and thus a label is remotely activated to achieve the purpose of reading.

The invention provides a circular waveguide antenna based on a dielectric lens, so as to solve the technical problem of insufficient collection of incident waves in the prior art. The circular waveguide antenna based on the dielectric lens comprises a circular waveguide and a dielectric lens fixed with the receiving end, wherein the upper bottom surface of the dielectric lens is located at one side of the receiving end of the circular waveguide; the dielectric lens comprises a cylindrical medium and multiple circular cylindrical medium layers which are nested sequentially from inside to outside with the cylindrical medium as a center, the lower bottom surface is thus a spherical surface, the upper bottom surface is a planer surface, the side surface has a round table body structure with aninward concave arc surface, the cylindrical medium and the circular cylindrical mediums comprise multiple first cylindrical mediums and first circular cylindrical mediums laminated vertically respectively, and the first cylindrical medium and the first circular cylindrical medium are formed by multiple first basic units and second basic units in a joint mode. Material parameters at different positions can be realized through changing the size of spherical space inside the first basic unit and the second basic unit, electromagnetic waves can be effectively converged, and the manufacturing costis low.

The invention relates to an antenna with high isolation and low cross polarization level, a base station and a terminal. The antenna comprises at least one radiation layer, a feed layer and an aperture coupling layer arranged between the radiation layer and the feed layer, and the aperture coupling layer comprises a metal sheet. The metal sheet is provided with a first feed gap, a second feed gap and a middle gap, and the middle gap is located between the first feed gap and the second feed gap and located in a weak electric field area of the metal sheet. By arranging the middle gap between the first feed gap and the second feed gap of the metal sheet, the boundary condition of the antenna can be changed under the condition that the radiation electric field of the antenna is not changed due to the existence of the middle gap, so that on one hand, the current in the cross polarization direction generated on the antenna is weakened, and the cross polarization level is reduced; and on the other hand, the energy coupling phenomenon of the antenna is effectively weakened, so that the isolation of the antenna is remarkably improved.

The invention discloses acrylpimaric acid diallyl ester and a microwave-assisted synthesis method thereof. The method comprises steps as follows: rosin and acrylic acid react, a modified product is prepared, then acrylpimaric acid sodium salt is prepared and has a microwave-assisted synthesis reaction with chloropropene in the presence of a quaternary ammonium salt catalyst and a polymerization inhibitor at a certain temperature for a period of time, NaCl is filtered and removed after the reaction, a certain quantity of an organic solvent is added for extraction, an obtained solution is poured into a separating funnel, is shaken up and then is left to stand for layering, an organic solvent layer is taken and washed with distilled water to be neutral, the organic solvent is removed through rotary evaporation, and a sticky liquid, namely a product, is obtained. The product yield is high, the purity is good, the yield can be up to 92.2%, and the GC content is 98.6%. N, N-dimethylformamide or dimethyl sulfoxide is taken as a reaction medium for the reaction. With the adoption of microwave heating, the radiation energy is high, the efficiency is high, the reaction time is short, the operation is simple and convenient, the product is easy to separate, the product yield is high, and the purity is good.

The invention discloses a stove burner. The stove burner comprises a base, a burner cap set, a gas mixing chamber and a plurality of injection pipes, wherein the top and the bottom of the gas mixing chamber are connected to the burner cap set and the base correspondingly and form three gas cavities, and the injection pipes are connected below the base and communicate with the three gas cavities; the burner cap set comprises an inner ring burner cap, a middle ring burner cap and an outer ring burner cap which are sequentially arranged from inside to outside, the inner ring burner cap uses an atmospheric combustion mode, and the strength of fire holes is 6-6.5 W/mm<2>; the outer ring burner cap uses an infrared combustion mode, and the strength of fire holes is 0.3-0.8 W/mm<2>; and the middle ring burner cap uses a half-atmosphere and half-infrared combustion mode, and the strength of fire holes is 2.5-3 W/mm<2>. According to the stove burner, burner cap structures with different three-ring burning modes are arranged, so that flame radiation energy of the burner is greatly increased, the defect that the temperature of a traditional stove with a single burning mode is not uniform is overcome, the heat efficiency of the burner is improved, and the heat loss is reduced.

An ultraviolet device packaging structure disclosed by the present invention comprises a chip, a lens and a substrate, the chip is arranged in a light-condensing accommodating hole of the lens, the chip can be conducted with an external element by using a first conduction element, the substrate blocks the accommodating hole, the chip is packaged in a packaging cavity, and the packaging cavity is filled with a protective gas. Inert gases such as nitrogen can be selected as the protective gas, and the chip is prevented from being influenced by the atmosphere, so that the radiation energy of the deep ultraviolet light-emitting diode is improved, and the sterilization and disinfection effects of the deep ultraviolet light-emitting diode are enhanced. Meanwhile, the invention further provides a manufacturing method of the ultraviolet device packaging structure, a eutectic furnace is used for enabling protective gas to enter the space between the substrate and the lens, eutectic welding is achieved between the first conduction element and the lens, the chip and the protective gas are packaged in the packaging cavity, and therefore the influence of the atmosphere on the chip is effectively avoided, and the packaging quality of the ultraviolet device is improved. And the performance of the deep ultraviolet light-emitting diode is improved.