72results about How to "Improve Radiation Ability" patented technology

The invention relates to the field of thermal conductive printing ink, in particular to a far-infrared thermal conductive slurry, a preparation method and application thereof. The far-infrared thermalconductive slurry is prepared from, by weight, 7-15 parts of resin binder A, 1-6 parts of resin binder B, 18-30 parts of conductive fillers, 3-12 parts of far infrared powder, 6-15 parts of additivesand 30-50 parts of solvent, wherein the ratio of the total mass of the resin binder to the mass of the solvent is 1:1-5.

The invention relates to a high-temperature radiation temperature enhancement device of a quartz lamp used for a guided missile thermal test. The high-temperature radiation temperature enhancement device comprises an interlayer water-cooled quartz lamp heating array, a water-cooled type cooper electrode base, a water flow channel of a lamp wall, a tungsten thermal fuse, a quartz lamp electrode, cooling water, a through water-cooled channel and a metal connecting pipe. A wall surface of the quartz lamp used for heating is designed into an interlayer form, part of the heat quantity on the surface of the quartz lamp can be removed by the cooling water flowing through the water flow channel of an interlayer lamp wall, so that the surface temperature of quartz glass is dropped to below softening temperature 1600 DEG C, an infrared light generated by the tungsten thermal fuse of the quartz lamp can penetrate through a wall surface of a heater of a transparent interlayer water-cooled quartz lamp and the transparent cooling water to radiate outwards. In the high-temperature radiation temperature enhancement device, a radiating capacity of the quartz lamp heating array exceeds the primary use limit temperature 1200 DEG C, and the maximum radiation temperature is increased to 1450 DEG C. Therefore, an effective high-temperature pneumatic thermal test analog method is provided for researching a hypersonic missile with faster flying speed, and the high-temperature radiation temperature enhancement device has an important application value in military engineering.

The invention belongs to the technical field of nuclear reactor design, and in particular relates to a reactor core with high fast neutron fluence. The reactor core consists of fuel assemblies, control rod assemblies and beryllium assemblies. The plurality of fuel assemblies are hexagonal sleeve type fuel assemblies and in annular compact arrangement; six fuel assemblies are arranged on an innermost ring to form a fast neutron trap at the center of the annular region; the plurality of hexagonal beryllium assemblies are arranged close to the external side of the annular region of the fuel assemblies to form an inverted neutron trap; and the plurality of control rod assemblies are arranged among the fuel assemblies at intervals and in two rows and two columns in a squared shape. The reactor core with high fast neutron fluence satisfies internationally restricted U-235 enrichment degree and requirements of domestic fuel core production and design of coolant flow velocity, and can obtain high fast neutron fluence level in an irradiation tunnel, and enhance and widen irradiation capability and scope of application of a test reactor.

The invention discloses a cement clinker production technology for enriching CO2 by use of an O2 / CO2 combustion technology, belonging to the field of cement clinker production technology. In the cement clinker production technology, O2 separated from the air is mixed with a high-concentration CO2 circulating flue gas, and then the mixture is introduced into a decomposing furnace and a rotary kiln to realize O2 / CO2 combustion; the kiln-tail flue gas after the coal powder combustion and clinker decomposition in the decomposing furnace and the rotary kiln is rich in CO2, and the concentration of CO2 in the kiln-tail flue gas exceeds 95%; after flue gas treatment, the concentration of CO2 in the kiln-tail flue gas exceeds 99%; the kiln-tail flue gas can be stored and recycled so as to realize enrichment and recovery of CO2 in a cement production process; and meanwhile, the reduction of CO2 emission is realized in the cement production technology.

The invention discloses an oxygen / carbon dioxide combustion technique applied to a cement clinker production process. The oxygen / carbon dioxide combustion technique comprises the following steps: cooling a clinker by a first path of air, feeding a first path of high-temperature fume as secondary air into a rotary kiln after clinker cooling, preheating a second path of high-temperature fume by a heat exchange device, introducing an O2 / CO2 gas of a decomposition furnace, and feeding into a waste heat boiler for waste heat power generation; feeding a second path of air into the rotary kiln through a combustor; feeding fume discharged from the tail end of the rotary kiln into a preheater I for preheating a raw material, and feeding fume discharged from the preheater I into the waste heat boiler; feeding fume discharged from the decomposition furnace into a preheater II for preheating the raw material; generating backflow fume of which the CO2 concentration is greater than 95% from the preheater II, mixing a part of the backflow fume with oxygen separated from a third path of air, preheating, feeding the mixed gas as an O2 / CO2 atmosphere for raw material decomposition into the decomposition furnace, and performing purification, dust collection and concentration on the other part of the mixed gas, thereby obtaining CO2 of which the concentration is greater than 99%. Compared with a conventional cement clinker production process, the cement clinker production process disclosed by the invention has the advantage that the emission amount of CO2 is reduced by 60-75%.

The invention provides a high-adjustment-ratio water-cooling premixed combustion high-strength heat exchange gas condensation boiler. The high-adjustment-ratio water-cooling premixed combustion high-strength heat exchange gas condensation boiler comprises a combustor and a heat exchanger, wherein the full-premixed combustor mounted in the center of a boiler top plate consists of a booster fan, a premixing chamber and a water-cooling combustion head; a flame stabilizing pipe and an anti-tempering column of the water-cooling combustion head can realize high-adjustment-ratio water-cooling premixed combustion; the heat exchanger consists of a lap of water-cooling wall and one or more laps of fins uniformly arranged in the peripheral direction by bent edge folding fin pipes; an air blower feedsair into the premixing chamber for fully mixing with gas to enter an inner cavity of a hole plate of the combustion head; the air flows out from a fire hole, and is sprayed out from narrow gaps amongthe water-cooling pipes distributed in the peripheral direction; after the air flows out from the flame stabilizing pipe, the air is ignited to uniformly combust in the peripheral direction and the axial direction, and radiates and releases heat to an inner pipe ring; smoke flushes base pipes and fins of inner and outer ring fin pipes in sequence to reinforce heat exchange; and the smoke downwards flows into a dew bearing disc through gaps between a housing and an outer layer fin pipe, and is exhausted into atmosphere from a smoke outlet. The high-adjustment-ratio water-cooling premixed combustion high-strength heat exchange gas condensation boiler is high in combustion load adjustment ratio, compact in heat exchange, low in nitrogen emission and high in heat efficiency.

The invention discloses a satellite-communication-based remote medical system which comprises a remote medical central station and a plurality of remote medical terminals connected with the remote medical central station through a satellite. The remote medical central station has business function, management function and networking function and supports communication with the remote medical terminals for business data transmission. The satellite-communication-based remote medical system is connected with the satellite. The remote medical terminals are used for communications and business communication with the remote medical central station or other remote medical terminals. Remote medicine is realized by a satellite communication system, the problem that establishing the remote medical system in the traditional way in the remote areas is high in cost and difficult is solved. The satellite-communication-based remote medical system has the advantages of point-to-multipoint transmission, low cost, low power consumption, easiness in maintaining, wide coverage and the like.

The invention relates to a high-efficiency and high-strength composite material with far infrared radiation heating. The material is characterized in that the material comprises the following raw materials in percentages by mass: 1-10% of graphene, 5-10% of graphite, 5-10% of nanocarbon, 1-2% of tourmalinite, 0.3-2% of a thickening agent, 0.01-0.05% of an antifoaming agent, and the balance being an aqueous high-molecular material. The far infrared composite material comprises graphene, graphite, nanocarbon, tourmalinite, and other powder materials with the far infrared radiation heating function. The material can be widely applied to electric heating, electric heating drying, health care, antibiosis, and other aspects. In addition, the composite material comprises the special tourmalinite material, in order to release a certain concentration of negative oxygen ions, and realize the purpose of air purification and environmental protection.

The invention discloses a reinforcement method for the single event latchup resistance of a CMOS device. Neutron irradiation is carried out on the CMOS device; a displacement damage is introduced in the neutron irradiation; and a current gain of a parasitical bipolar transistor in an inverter of the CMOS device is reduced, so that P-N-P-N latchup is not generated. The reinforcement method is an external reinforcement method; processing steps to produce the device will not be increased; there is no need to redesign a device layout for the single event latchup effect; and complexity of an original system will not be increased. Thus, the fixed size of the device will not be changed, and a peripheral circuit will not be increased either.

The invention discloses an additive composition, a thermal-insulation paint and application thereof. The additive composition comprises the following raw materials in parts by weight: 5-20 parts of coated ceramic hollow microbead, 5-20 parts of far-infrared radiation powder and 5-15 parts of infrared reflection pigment. The coated ceramic hollow microbead comprises a hollow microbead base and a coating. The coating comprises the following components: 1) oxide of titanium; 2) oxide of silicon; and 3) oxides of at least two of Al, Na, K, Ca, Cr, Mn, Fe, Co, Cu and Mg. The additive composition and paint have excellent thermal insulation function.

The invention discloses an atmospheric gas radiation heating device which comprises a burner, a quartz glass radiant tube and an igniter, wherein the burner comprises a nozzle, an injection tube and a burner head part; the burner head part consists of an inner tube and an outer tube which are concentric, and one end of an annular belt between the inner tube and the outer tube is sealed; the injection tube is communicated with the annular belt; the end of the sealed annular belt of the inner tube is a secondary air inlet, while the other end of the inner tube is provided with an inner flame cover; a corresponding end of the outer tube is provided with an outer flame cover, and a flame hole is formed between the inner flame cover and the outer flame cover; and the inner tube is internally provided with a secondary air conditioning device. The invention has simple structure, convenient mounting, low manufacture and maintenance cost, high burning strength, long service life and large burner load regulation ratio, can meet the requirement of different heating powers to a larger extent and can be widely applied to industrial kilns of the industries of steel, petrochemical industry, machinery, building materials, boilers, waste incineration, and the like.

The invention discloses a blackbody material and an energy-saving radiation cup made of such blackbody material, belonging to the technical field of energy-saving material. The blackbody material is composed of the following constituents according to percentage by weight: 95% of silicon carbide, 0.5% of iron trioxide, 0.5% of manganese dioxide and 4% of aluminum oxide. The energy-saving radiation cup comprises a cup body and a cup bottom, wherein the cup body is in the shape of a straight cylinder, the middle of the cup body is a hollow cavity, the part of the hollow cavity close to the cup bottom is spherical, and the section of the outlet of the hollow cavity is trapezoidal; an arc groove is arranged on the cup bottom plane. The blackbody material provided by the invention has the advantages of greatly reducing heating-up time of hearth and improving the uniformity of hearth temperature, improving the capacity of industrial kilns and industrial boilers, and saving fuel, wherein the energy saving rate can be 7%-20%.

The invention discloses an active infrared camera. The active infrared camera comprises a visible light camera, an RJ45 interface, a processor with a video encoding and decoding circuit integrated therein, an infrared optical camera and an infrared emission light source, wherein the infrared emission light source comprises multiple infrared lamp beads and a lamp base coaxially arranged on the infrared optical camera; the infrared lamp beads are symmetrically arranged on the lamp base; the digital output end of the infrared optical camera is connected with the digital signal input end of the processor; the video signal output end of the visible light camera is connected with the video signal input end of the processor; the communication signal end of the processor is connected with the RJ45 interface; and the RJ45 interface is connected with a router through a network line. By using the active infrared camera, data acquisition can be provided for forest fire prevention monitoring around the clock in all regions for 7*24 hours in a high-quality and multi-application mode finally.

The invention provides a plasma combustion-supporting Swiss roll combustor and belongs to the technical field of low-heating-value gas utilization. The combustor comprises a combustion chamber and a spiral plate type channel. The combustor specifically comprises a combustor shell, a flow guide plate, a porous medium, a gas inflow channel, a gas outflow channel, a discharge device, an ozone addition opening, a thermometer hole, an ignition hole, an observation hole, a metal high-voltage electrode plate, an electrode leading-out wire and an exhaust chimney. The combustor is round or square. The upper end and the lower end of the combustor are sealed through sealing plates. The gas inflow channel and the gas outflow channel are formed in the two ends of the spiral plate type channel. The porous medium is located in the center of the combustion chamber. The inner wall of the combustion chamber is coated with a heat-resisting material. The combustion chamber is wrapped by a heat insulating material. The discharge device and the flow guide plate are located in an inlet of the combustion chamber. The ozone addition opening is formed in the outermost ring of the spiral plate type channel. According to the combustor, the plasma discharge device or an ozone generator and the porous medium material are combined, and the purposes of reducing energy consumption, eliminating poison and the like can be achieved.

The invention relates to a surface processing method for a heating element, which comprises the following steps sequentially: degreasing, i.e. adopting a method of powering on the heating element to remove surface oil; coarsening, i.e. adopting a sand-blast method to make the surface of the heating element coarsened; cleaning, i.e. adopting high pressure air to blow out impurities on the surface of the heating element; curing, i.e. filtering the impurities in the process of sufficiently uniformly dispersing coating; spraying, i.e. uniformly spraying the coating on the surface of the heating element; and sintering, i.e. carrying out sintering on the sprayed heating element to form a membrane. The surface processing method for the heating element strengthens radiation of the heating element and reduces convection so as to improve heat efficiency by spraying the coating on the surface of the heating element.

The invention belongs to the field of building interior wall decorating materials, and particularly relates to a light-weight, gas-permeable and humidity-regulating composite material for an interiorwall, which is compounded by virtue of unique microporous properties of a diatom material matrix, is healthy and environmentally-friendly, has excellent performance in regulating the humidity of an indoor space (good moisture absorption and moisture release), has high gas permeability, can release negative ions, and have a health-care function, and a preparation method thereof. A decorative material with the negative oxygen ion releasing environmentally-friendly and health-care functions and a decorative board therefrom can be directly cut by using a wallpaper knife, can be directly nailed, can be directly processed by using a woodworking tool plane, can directly replace a sandwich panel, a wood board, a plywood and a simulated wood board in subsequent processing, and can be directly usedfor furniture manufacturing, cabinet combination manufacturing and the like; many problems such as roll stickiness, cracking and low qualification rate of a finished product due to strong adsorption force between diatomite and bentonite in the moulding process of the board are solved.

The invention provides an energy-saving high-intensity ceramic paint. The energy-saving high-intensity ceramic paint comprises the following components in percentage by weight: 2.5%-30% of cement, 20%-90% of aggregate, 1%-20% of energy-saving material, 1%-10% of additive and 0-10% of steel fiber or carbon fiber. The energy-saving high-intensity ceramic paint provided by the invention not only has the advantages of high early strength, high intensity, wear resistance, energy conservation and the like, but also has high radiation capability, also has the characteristics of high early strength and high intensity, ensures the peaceability thereof and improves the rupture strength by adopting the formula provided by the invention.

A GPS (global positioning system) antenna capable of simplifying debugging consists of a long conductor (1), a short conductor (2) and a tail end adjusting circuit (3), wherein the long conductor (1) and the short conductor (2) are respectively arranged on two parallel planes and are non-intersected with each other. The long conductor and the short conductor are respectively coiled, bent and engaged in permutation and combination of multiple coiled units and bent units, which are connected in series. The head end of the long conductor (1) is connected with a signal ground end (G) of a radio signal, the head end of the short conductor (2) is connected with the signal end (S) of the radio signal; the tail end of the long conductor (1) is connected with the tail end adjusting circuit (3); and the tail end of the short conductor (2) is suspended. By using an electromagnetic material as a substrate, the design purposes of high radiation property, good frequency response and small size are fulfilled. According to simulation detection, the product is excellent in property, reasonable in shape structure, low in energy consumption, environment friendly, especially beneficial to mass industrial production, low in production cost and very wide in market prospect.

The invention provides a watchband antenna for a wearable wireless system, including a watchband and a feed device arranged on the watchband. The watchband is made of a metallic material and is provided with at least one gap. The feed device includes a microstrip dielectric substrate, a metal ground disposed on the microstrip dielectric substrate, and a feed probe. The feed probe penetrates the metal ground and the microstrip dielectric substrate and is inserted into and connected in the gap in the watchband. The watchband antenna is easy to install, solid in structure, low in price, light in weight and small in size, and reduces the burden on users. With the watchband antenna structure, the antenna radiation is achieved, and the selection range of the wearable wireless system antenna is expanded.

The invention relates to the field of environmental protection technology and particularly relates to a novel energy-saving and environment-friendly combustion engine, which comprises a muffler, a primary air port, a secondary air port, a nozzle, an igniter, an injector, a sprayer, a plum blossom-type flue brick, a nameplate, a motor, a combustion cylinder, an air pressure switch, a control box and an ignition transformer. The injector and the sprayer are directly connected to form an integral structure. The nozzle and the motor are directly connected and are positioned right in front of the muffler. The nameplate is arranged on the left upper part of an instrument. The igniter is arranged in front of the muffler. The combustion cylinder is directly connected with the ignition transformer and is right above the sprayer. According to the technical scheme of the invention, through reasonably organizing the combustion process, the above combustion engine is more energy-saving, more environment-friendly, higher in combustion efficiency, stable in combustion, good in flame performance, strong in radiation capability, high in heat recovery capability, small in noise, less in amount of noxious gas and smoke, convenient to use, simple in design, low in cost and worth to popularize and use widely during the working process.

The invention discloses an oxygen-enriched combustion system for a coal gas electricity generation boiler. The oxygen-enriched combustion system comprises a boiler emergency stop protection system, as well as an oxygen pipeline, an air pipeline, a smoke exhaust pipeline and a coal gas pipeline which simultaneously communicate with a boiler furnace, wherein a coal gas quick cut-off valve is arranged on the coal gas pipeline; an oxygen content analyzer and an induced draft fan are sequentially arranged on the smoke exhaust pipeline; a blower and an air control valve are sequentially arranged on the air pipeline; an oxygen control valve and an oxygen quick cut-off valve are sequentially arranged on the oxygen pipeline; the boiler emergency stop protection system is electrically connected with the coal gas quick cut-off valve, the oxygen quick cut-off valve, the blower, the induced draft fan and the oxygen content analyzer simultaneously; and the oxygen content analyzer can send the oxygen content of boiler exhaust in the smoke exhaust pipeline to the boiler emergency stop protection system in real time, and the boiler emergency stop protection system controls to close the oxygen quick cut-off valve when the oxygen content of the boiler exhaust, received by the boiler emergency stop protection system, is larger than a security set value. The oxygen-enriched combustion system has the advantages that energy saving and environmental protection are achieved and the heat efficiency of the boiler furnace can be improved.

The invention relates to a combined type ceiling radiant plate, belongs to terminal devices of independent temperature and humidity control central air conditioners and can be used in an air conditioning system for refrigeration and heating. A radiant ceiling is composed of a radiant coiler, a heat conduction plate good in heat conduction performance, a decoration ceiling panel and the like. The inflection type radiant coiler is clamped in a pipe groove of the heat conduction plate to increase the downward radiant quantity of the radiant ceiling. The heat conduction plate can be machined into different specifications according to the onsite building structure condition. The decoration panel with or without micro holes clings to the lower surface of the heat conduction plate to serve as a ceiling face, convection heat exchange of the radiant plate and indoor air is improved while radiant heat exchange is conducted, and the refrigeration / heating capability is improved.

The invention relates to radon-resisting modified asphalt. The radon-resisting modified asphalt is characterized by being prepared from 20 to 90 percent of matrix asphalt, 0.1 to 30 percent of polymer modifier, 1 to 50 percent of radon radiation resisting elementary material and 0.1 to 20 percent of additive. The invention also provides a preparation method of the radon radiation resisting modified asphalt. The radon radiation resisting modified asphalt disclosed by the invention has excellent water-proof property, and the functions of radon radiation resistance, air purification and the like.

The invention discloses a periodic leaky-wave antenna with highly stable gain based on a composite left-right hand structure. The antenna comprises a dielectric plate, a metal transmission band, a metal floor, a feed connector and an impedance matching unit, and the metal transmission band is formed by cascading a plurality of composite left-right hand units which are periodically arranged on a microstrip transmission line; wherein each composite left-right hand unit comprises a metal connecting body, transverse straight grooves, inclined grooves and additional small grooves, a plurality of groups of transverse straight grooves are etched on one side of a metal conveying belt along the length direction, a plurality of metal connecting bodies are arranged on the other side of the metal conveying belt, the additional small grooves are etched between every two adjacent transverse straight grooves, and the inclined grooves are etched on two sides of each group of transverse straight grooves. According to the invention, the open stopband effect of the traditional periodic leaky-wave antenna is eliminated, the attenuation-free scanning in the edge emission direction can be realized, thebeam scanning range is large in the working range, the directivity is strong, the beam gain maintains high stability, and the leaky-wave antenna can be widely applied to the fields of multipoint communication, automobile radar and the like.

The invention relates to an external heating type high-quality activated carbon high-efficiency energy-saving environment-friendly rotary activation furnace and an application method thereof. The external heating type high-quality activated carbon high-efficiency energy-saving environment-friendly rotary activation furnace comprises a rotary furnace barrel, an external heating furnace body, an activated tail gas recovery combustion system and a flue gas recovery heat exchange system, and further comprises a hot water recovery steam generation system, a steam overheating system and an air preheating system. The annular furnace cavity is divided into a plurality of combustion chambers and a smoke collecting cavity, a plurality of gas burners are arranged on the outer circumferential wall ofthe outer heating furnace body corresponding to the combustion chambers, and the rotary furnace barrel is sleeved with a heat radiation heating body. The application method of the activation furnace comprises the following steps: during blow-in production, auxiliary gas and quantitative air are mixed and combusted to indirectly heat the rotary furnace barrel; a carbonized material is fed into thefurnace barrel, and activation reaction is carried out on the carbonized material and auxiliary water vapor to generate activated carbon and activated tail gas; the activated tail gas exchanges heat,is cooled and then is mixed with quantitative hot air for combustion to replace auxiliary gas; and circulating hot water is fed into a tail gas and flue gas waste heat boiler for heat exchange to generate a large amount of water vapor to replace auxiliary water vapor. The rotary activation furnace significantly improves the quality and yield of activated carbon, and is energy-saving and environment-friendly.

The invention discloses an evaporator which comprises a heat exchange part and a heat-resistant transmitting plate; one side of the heat-resistant transmitting plate is attached to the surface of theheat exchange part; the heat-resistant transmitting plate is prepared from a material, the heat conductivity coefficient of which is in a range of 0.02-0.2W / mK and the transmittance of which on thermal radiation, the wavelengths of which are 9-11[mu]m is over 50%. The evaporator disclosed by the invention can avoid dew formation of the evaporator, so that the radiating heat exchange efficiency isincreased, and meanwhile, the invention also provides an air conditioning refrigerating system.

The invention provides novel chemical fiber cotton. The novel chemical fiber cotton comprises, by mass, 15% to 25% of nanosized mesoporous silicon dioxide hollow fibers, 10% to 20% of skin core type low-melting-point polylactic acid fibers and 35% to 70% of nanofibers. Nanometer far infrared ceramic powder is added to a functional adhesive and the blending ratio of a nanometer ZnO material to a nanometer MgO material is 35 / 65. The thickness of the finished product ranges from 2 mm to 6 mm and the weight ranges from 120 g / m<2> to 160 g / m<2>. The internal diameter of each hollow tube of the nanosized mesoporous silicon dioxide hollow fibers ranges from about 0.5 micron to 1 micron, the tube wall thickness is about 0.5 micron, the length of each fiber can reach 50 microns, and the good heat stability is guaranteed through the large specific surface area and the large hole wall thickness. A nanometer material has the advantages of being capable of achieving the special effects of resisting ultraviolet rays and absorbing visible light and infrared rays, resistant to aging, high in strength and tenacity, good in conductive and static shielding effect, high in antibacterial function and deodorization function and adsorption capacity and the like. The finished product is light, thin and soft in texture, excellent in elasticity and higher in heat preservation performance and radiation performance, and the use heat preservation performance and social and economic benefits of the chemical fiber cotton are improved.

The invention discloses an automatically adjusted infrared camera. The automatically adjusted infrared camera comprises an infrared optical camera, a visible light camera, an RJ45 interface, an infrared lamp and a processor, wherein the processor is integrated with a video coder and decoder circuit, a pulse-width modulation circuit and a video analysis algorithm circuit; the digital signal output end of the infrared optical camera is connected with the digital signal input end of the video analysis algorithm circuit; the video analysis algorithm circuit is connected with the pulse-width modulation circuit; the output end of the pulse-width modulation circuit is connected with the infrared lamp; the video signal output end of the visible light camera is connected with the video signal input end of the video coder and decoder circuit; and the communication signal end of the processor is connected with the RJ45 interface. By using the automatically adjusted infrared camera, data acquisition can be provided for forest fire prevention monitoring around the clock in all regions for 7*24 hours in a high-quality and multi-application mode.

The invention discloses a stage feedback loudspeaker box. The stage feedback loudspeaker box comprises a box body, wherein the contour of the cross section of the box body is shaped like a right trapezoid; two mid-range loudspeakers and two coaxial loudspeakers are arranged on an inclined panel of the box body; a sound amplifying module is arranged on a vertical back plate; the inclination angle of the inclined panel is between 40 degrees and 50 degrees; the width of a top flat plate is between 3cm and 30cm. The stage feedback loudspeaker box provided by the invention has the advantages that the box body adopts an irregular structural design, so that standing waves in the box body can be reduced, and the tone is cleaner; with the top flat plate, a singer can conveniently sit or place his / her feet on the box body, so that the interactivity with the audience is effectively enhanced; the inclined panel is arranged at an angle of 40 degrees to 50 degrees, so as to effectively ensure that the sound axis can be directly oriented to the ears of the singer, and achieve good radiation effects; the two coaxial loudspeakers and the two mid-range loudspeakers not only achieve a large volume, good layering effects and high appealingness, but also achieve an ampler frequency allocation of the loudspeaker box, smooth cohesion among high-frequency tones, middle-frequency tones and low-frequency tones, and a wide sound field, so that the overall tone quality is improved.

The invention discloses a nut stereo imaging detection device and method. The nut stereo imaging detection device comprises a data acquisition module, a data storage module, a data matching module and a central processor, the data acquisition module comprises an X-ray machine and a camera, and the data storage module is a bolt model library and comprises data of various different types of nuts; and the data matching module is used for comparing and matching the acquired data with the stored data. The method comprises the following steps: establishing the data model library in which data of various different types of nuts are stored, providing comparison objects for the device to detect the different types of nuts, establishing a data model of the detected nut through the camera and the X-ray machine, and comparing the data model read at this time with the nut data input in advance by using the data matching module. By using the detection mode, not only can the appearance defects of the nut be detected, but also the internal condition of the nut can be detected, and the situation that the nut is not enough in structural strength and damaged during use is avoided.