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4612 results about "H shaped" patented technology

Low-cost microwave- and millimeter-wave polarized antenna of multi-layer PCB (Printed circuit board) process

The invention discloses a low-cost microwave- and millimeter-wave polarized antenna of the multi-layer PCB (Printed circuit board) process. The polarized antenna is of a multi-layer structure and comprises a quadrate radiating metal patch, an upper dielectric substrate, a metal floor equipped with an H-shaped coupling gap, a medium dielectric substrate, a feed metal plate with power division network, a lower dielectric substrate and a bottom metal floor; the quadrate radiating metal patch is coupled with the floor equipped with the H-shaped coupling gap to realize feed; the feed network of a microstrip line structure is positioned below the floor; the metal floor equipped with the H-shaped coupling gap is connected with the bottom metal floor through a metal through hole; the feed metal plate with the power division network is connected with the bottom metal floor through a second metal through hole to form a coaxial microstrip line conversion structure by which feeding from the bottom part of the antenna is realized. The antenna has the characteristics that the frequency band is wide, the size is small, the cost is low, the manufacturing and processing are simple, and the axial ratio feature is great.
Owner:SOUTHEAST UNIV

Nuclear magnetic resonance detection device and method for advanced detection of water bodies in front

The invention relates to a nuclear magnetic resonance detection device and a nuclear magnetic resonance detection method for the advanced detection of a water bodies in the front. In the device, a computer is connected with a system controller, a high-power power supply and a signal acquisition unit by a serial port bus respectively; and the system controller is formed by connecting a bridge circuit driver, a high-power H-shaped transmitting bridge circuit, a resonant capacitor and a transmitting coil. Compared with the prior art, the device can detect important information such as the existence of water-bearing bodies in the front, the water content of the water-bearing bodies and the like accurately and effectively. The occupied area of the coil is reduced effectively by a mode of arranging the coil vertically, so that the device can perform exploration in narrow space. The device can detect the underground geological condition within a certain distance in the front directly and accurately in production fields of coal fields and mines or construction sites of tunnels so as to reduce mine accidents caused by geological disasters such as water burst, mud gushing and the like due to unclear geological conditions in the front or various incidents caused by the geological disasters in the process of tunnel construction.
Owner:长春国地探测仪器工程技术股份有限公司

Easily repaired steel-structure beam-column node

InactiveCN101812872ASolve the lack of ductilitySolve the problem prone to brittle failureShock proofingHigh intensitySteel columns
The invention relates to an easily repaired steel-structure beam-column node, in particular to an easily repaired steel-structure beam-column node which is applied in the field of structural engineering and particularly used in high-intensity earthquake-proof areas. The node comprises an upright H-shaped steel column and an H-shaped steel beam of which the end part is vertically connected on a side wing plate of the H-shaped steel column, and is characterized in that: connecting ends of a belly plate of the H-shaped steel beam and the side wing plate of the H-shaped steel column are connected by a reinforced connecting plate closely contacted with the belly plate of the H-shaped steel beam and high-strength bolts penetrating the reinforced connecting plate, the reinforced connecting plate is in welding connection with the side wing plate of the H-shaped steel column, and both sides of the connecting end of a bottom side wing plate of the H-shaped steel beam are in locked connection with the H-shaped steel column by a T-shaped connecting plate and penetrating high-strength bolts respectively; and the T-shaped connecting plate is transversely arranged, upper and lower ends of the T-shaped connecting plate in the vertical direction are in locked connection with the side wing plate of the H-shaped steel column by a washer and the penetrating high-strength bolts respectively, a transverse plate of the T-shaped connecting plate is supported on the lower part of the bottom side wing plate of the H-shaped steel beam and locked by the penetrating high-strength bolts. The structure can effectively avoid brittle failure, has good ductile fracture characteristic, and can be widely applied to structures of earthquake areas, particularly the high-intensity earthquake-proof areas; and the easily repaired steel-structure beam-column node of the invention also has the advantages of convenient construction and convenient after-earthquake repairing.
Owner:FUZHOU UNIV

High-ductility steel structure beam column node in angle steel connection and construction method of high-ductility steel structure beam column node

The invention relates to a high-ductility steel structure beam column node in angle steel connection and a construction method of the high-ductility steel structure beam column node. The invention is characterized in that: upper and lower flange plates of an H-shaped steel beam are respectively connected with a steel column by using flange angle steel, a flange steel cushion plate and a friction type high-strength bolt; a web plate of the H-shaped steel beam is connected with the steel column by using web plate angle steel, a web plate steel cushion plate and the friction type high-strength bolt; bolt holes in a flange angle steel branch and a web plate angle steel branch, which are connected with the H-shaped steel beam, are long circular holes; horizontal reinforcing ribs are arranged, at a joint of the steel column and the H-shaped steel beam, inside the steel column; and a gap is reserved between an end head of the H-shaped steel beam and the steel column. The high-ductility steel structure beam column node has quite high ductile deformation capacity and excellent energy-dissipation capacity; and connection welded beams are not formed on beam column members, so that the brittle failure of the steel beam or the steel column in a node area under the action of a seldom-occurring earthquake is avoided. Furthermore, the high-ductility steel structure beam column node has the advantages of convenience for construction, simple and quick in repair operation after the earthquake, low in repair cost and the like.
Owner:FUZHOU UNIV

Production process method of pipe whip restraint steel structure of main power house of nuclear power station conventional island

The invention belongs to the technical field of pipe whip restraint steel structures of main power houses of nuclear power station conventional islands, in particular to a production process method of the pipe whip restraint steel structure of the main power house of the nuclear power station conventional island, which comprises the lofting process, the marking-off and scribing process, the cutting processing process, the bevel processing process, the hole-making process, the correction process, the polishing surface, the material splicing process, the pre-splicing process of a steel member, the assembly process, the processing process of a friction surface, the welding process of the steel structure and the anti-slip test of the friction surface of the steel member before leaving a factory, sandblasting, derusting and coating of a base coat are carried out in the factory, and the production of the steel structure is divided into the production processing of a welded H-shaped steel column, the production of a steel beam, the assembly and the welding of a support part, the production of a combined steel beam, the assembly and the welding of a girder box body and an inclined support below the girder box body, and the assembly and the welding of a pipe whip restraint key. The production process method can improve the drilling precision, utilize a numerical control planar drilling machine to complete the drilling on a gusset plate, determine a variety of processing processes and welding process parameters, and ensure the dimension of the member after the assembly and the smooth proceeding of field installation.
Owner:EAST STEEL STRUCTURE BRIDGE
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