3results about How to "Avoid heavy" patented technology

This invention discloses a radar-infrared compatible stealth composite material with infrared camouflage function, belonging to the field of multi-spectrum compatible stealth technology. The radar-infrared compatible stealth composite material comprises, from top to bottom, a top coding layer, a first dielectric layer, a second dielectric layer, a conductive reflective layer, and a third dielectric layer along the electromagnetic wave propagation direction. The top coding layer includes several zero-patch large units and one-patch large units. Along the electromagnetic wave propagation direction, the zero-patch large units and one-patch large units, together with the dielectric layer and reflective layer below them, constitute zero-coding units and one-coding units, respectively. These units are arranged in an array structure according to coding patterns generated by a multi-objective optimization algorithm. This invention utilizes the arrangement of zero-coding units and one-coding units to construct an infrared camouflage pattern matching the complex background thermal radiation characteristics in the infrared band, and utilizes the reflection phase difference between the two coding units in the microwave band to achieve radar cross-section reduction, thus completing radar-infrared compatible stealth.

The utility model relates to PVC electric power pipe technical field especially light weight PVC electric power pipe, including pipe body, the pipe body is composed of inner tube, outer tube and spiral reinforcing rib, the inner side of a plurality of spiral reinforcing rib is fixedly connected with the outer wall of inner tube, the outer side of a plurality of spiral reinforcing rib is fixedly connected with the inner wall of outer tube. Through the cooperation between pipe body, inner tube, outer tube, spiral reinforcing rib and annular reinforcing rib, the three-layer structure is formed by material function differentiation+structure mechanics optimization system advantage, the three-grade design of inner tube filler weight reduction, hollow reinforcing rib layer structure enhancement, outer tube protection makes pipe material weight to reduce 30% 40% compared with traditional product, and the compression strength is improved, effectively avoid the problem that traditional PVC electric power pipe exists weight is big, this not only increases the transportation cost, also brings the problem of the inconvenience of construction installation.

The utility model relates to the technical field of mobile phone shell, concretely relates to a high strength mobile phone shell, the mobile phone shell includes the casing for containing mobile phone, the casing includes the frame and the coating that fits in the frame openwork department, the coating includes the wear -resisting layer, first fiber layer, second fiber layer and third fiber layer that set up in order from top to bottom laminated, the wear -resisting layer is used for wear -resisting scratch, first fiber layer and third fiber layer are used for promoting the strength of coating, second fiber layer is used for absorbing impact energy. The utility model aims at providing a kind of high strength mobile phone shell, through the laminated structure design of uniqueness, the combination of wear -resisting layer and multilayer fiber layer, not only promote the strength and wear resistance of mobile phone shell, but also effectively absorb impact energy, thereby in the protection mobile phone, prolong the service life of mobile phone shell.