31results about How to "Easy to integrate and assemble" patented technology

The invention discloses a multifunctional metasurface and a stealth antenna. The unit of the metasurface consists of five metal layers in sequence and four layers of dielectric substrates between the metal layers, wherein the first, second, fourth and fifth metal layers are respectively There are two parallel and equal-length rectangular metal patches; the rectangular metal patches of the first and second metal layers have different lengths, and other parameters are the same, and only the patch lengths of the fourth and fifth metal layers are different; The metal patches of the four metal layers are orthogonal to each other; the third metal layer is provided with a C-shaped metal split ring; the metasurface realizes the transmission function when the y-polarized electromagnetic wave is incident in the normal direction, and when the x-polarized electromagnetic wave is incident in the normal direction The beam deflection function is realized, and the radar scattering cross-section reduction function is realized when the y-polarized electromagnetic wave is incident in the reverse direction. The invention can independently realize three functions of high-performance antenna, beam deflection and radar scattering cross-section reduction, can be applied to realize stealth antenna in some specific environments, and has the advantages of small electrical size, high gain and the like.

The invention discloses a preparation method of an energetic film Ni-Cr bridge wire pyrotechnic product with strong ignition capability. The energetic thin film Ni-Cr bridge wire pyrotechnic product is obtained by integrating the energetic film loaded with cuprous azide and the Ni-Cr bridge wire pyrotechnic device by means of assembly, specifically electrochemically Copper source is deposited, and the cuprous azide film is obtained through the liquid-solid azide method, and the cut cuprous azide film and the bridge wire pyrotechnic device are integrated and fixed by using the bridge wire pyrotechnic device pressure cap. The method of the present invention is simple and efficient, and the cuprous azide on the energetic film is evenly distributed on the carbon fiber, and the integrated Ni-Cr bridge wire pyrotechnic product can generate a high-temperature composite flame during the ignition process by supporting the cuprous azide film, thereby improving the It increases the output energy of Ni-Cr bridge wire pyrotechnics, enhances the ignition ability of the secondary charge, reduces the electrostatic sensitivity, and has the characteristics of high output capability and high safety.

The invention provides a power output device, an ice crusher and a refrigerator. According to the power output device, except for the motor and the mounting screws, all the power output device is formed by engineering plastics, the brushless motor is selected as a power source, and the brushless motor drives the gear train to achieve integrated output shaft output. The internal structure is more compact, the thickness of the gearbox shell of the power output device can be effectively compressed to be within 30 mm, the requirements of customers for light and thin products are met, and the space utilization rate of a refrigerator is increased. The brushless motor is high in safety and can meet the IEC explosion-proof test standard, the rotating speed and the rotating direction can be flexibly adjusted through a driving algorithm, the phenomena of ice clamping and rotation blocking are effectively reduced, and the ice crushing effect is optimized. According to the ice crusher, the output shaft integrally formed by engineering plastics is adopted, and the structure of the output shaft can realize power output without assembly and matching, so that faults caused by unreliable assembly among mechanical parts can be effectively avoided, and the use feeling of the ice crusher is improved.

The heterodyne laser interferometer based on the integrated secondary beam splitting component belongs to the field of laser application technology; the invention inputs two spatially separated beams with different frequencies to the heterodyne laser interferometer based on the integrated secondary beam splitting component, wherein the integrated two The sub-beam splitting assembly includes two beam-splitting surfaces perpendicular to each other in space, the two beam-splitting surfaces are coated with polarizing or non-polarizing beam-splitting film, and the travel path lengths of the measuring beam and the reference beam in the integrated secondary beam-splitting assembly are equal. The heterodyne laser interferometer described in the present invention significantly reduces the periodic nonlinear error. Compared with other existing space-separated heterodyne laser interferometers, it also has the advantages of simple structure, good thermal stability, large tolerance angle and easy integration and assembly. Advantages, it meets the high-precision and high-resolution requirements of high-end equipment for laser interferometry.

The invention belongs to the technical field of microstrip transmission array antennas, in particular to a metasurface-based four-beam microstrip transmission array antenna and a design method thereof. The four-beam microstrip transmission array antenna designed by the present invention is composed of a horn feed source and a metasurface microstrip transmission array; wherein, the horn feed source is composed of a waveguide and a horn opening; the distance between the horn opening and the metasurface microstrip array is F , the caliber of the metasurface microstrip array is D*D; the metasurface microstrip array is composed of N*N metasurface transmission units; the metasurface transmission unit consists of 3 layers of identical composite metal structures and 2 The composite metal structure is composed of an I-shaped structure and completely symmetrical metal patches, which are used to form two transmission mode couplings in the same plane, thereby reducing the unit resonance frequency and increasing the phase response slope and phase accumulation. . The advantages of the four-beam microstrip transmission array antenna designed in the present invention are low side lobe, high gain, balanced beam, light weight, low cost and easy assembly and integration.

The invention relates to a waveguide detection unit of a magnetic excitation coupling mechanism in the field of microwave technology, which solves the problems of the existing waveguide coupling detectors, such as large volume and weight, difficulty in integration, special processing of waveguide cavities, and the like. The invention uses a magnetic excitation coupling mechanism to replace the traditional electric field excitation coupling to realize the power monitoring of the main mode of the waveguide; a planar probe ring is used to replace the coaxial probe, which can greatly reduce the thickness of the detector; a low temperature co-fired ceramic (LTCC) is used as an integrated The chemical structure replaces the all-metal packaging structure of discrete devices. The invention has small structural size, low weight, and integrated ceramic structure without special surface treatment and is easy to integrate, and is suitable for miniaturized and highly integrated microwave and millimeter wave detection circuits and systems.

The invention discloses a spiral tubular heat exchanger for reducing tube winding. The spiral tubular heat exchanger for reducing tube winding comprises a housing and a spiral tube bundle with two ends mounted on a tube plate in the housing, wherein a tube pass inlet and a tube pass outlet or one or more tube pass inlets and outlets are formed in the housing; the tube pass inlet and outlet are used for distributing and collecting the heat exchange tube through a distributor; the spiral tube bundle is divided into multiple layers of concentric heat exchange tubes for being wound on a core tube; each layer of heat exchange tubes is spirally wound in the same direction; a separating wire is mounted between adjacent two layers of heat exchange tubes, and the winding direction is the same or reverse. Single heat exchange tube is formed by connecting one or more diameter tubes with different lengths; different diameter winding tubes are transited, fixed and connected through patterned plates. The spiral tube type heat exchanger disclosed by the invention can realize efficient heat exchange of different temperature sections under a large temperature span condition, and has the advantages of being compact in structure, high in heat exchange efficiency, beneficial to integrated assembly of heat exchangers in different temperature regions, capable of reducing the size of the heat exchanger, reducing the quantity of heat exchange equipment, and the like.

The present invention relates to a flexible supercapacitor with with NiS-MoS2 heterogeneous nano-sheet array structure based on carbon cloth loading and a preparation method thereof, belonging to thetechnical field of new energy material and device preparation. The flexible supercapacitor grows high-purity, high-density and high-orientation carbon cloth-loaded NiS-MoS2 heterogeneous nanosheet array by using anode material, carbon cloth coated with activated carbon as cathode material, PVA / KOH gel as diaphragm and electrolyte respectively. The anode has the advantages of high purity, high density, tidy appearance, strict controllable growth condition, simple equipment and process, low cost, high capacitance and good charge-discharge stability. The cathode material has excellent conductivity and large double-layer capacitance. The preparation process of the capacitor is simple, economical and environmentally friendly, and no post-treatment is needed. The supercapacitor provided by the invention has the advantages of light weight, large capacity, good cycle charging and discharging stability, and good flexibility, and can be used for power supply equipment of wearable electronic devices.