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3 results about "Mantis shrimp" patented technology
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Mantis shrimps, or stomatopods, are marine crustaceans of the order Stomatopoda. Some species have specialised calcified "clubs" that can strike with great power, while others have sharp forelimbs used to capture prey. They branched from other members of the class Malacostraca around 410 million years ago. Mantis shrimps typically grow to around 10 cm (3.9 in) in length. A few can reach up to 38 cm (15 in). The largest mantis shrimp ever caught had a length of 46 cm (18 in); it was caught in the Indian River near Fort Pierce, Florida, in the United States. A mantis shrimp's carapace (the bony, thick shell that covers crustaceans and some other species) covers only the rear part of the head and the first four segments of the thorax. Varieties range from shades of brown to vivid colors, as more than 450 species of mantis shrimps are known. They are among the most important predators in many shallow, tropical and subtropical marine habitats. However, despite being common, they are poorly understood, as many species spend most of their lives tucked away in burrows and holes.
A composite disc spring of a biomimetic spiral layup structure and a preparation method thereof
The application provides a composite disc spring with a biomimetic spiral layup structure and a preparation method thereof, and belongs to the technical field of spring manufacturing. The disc spring is formed by stacking multiple layers of fiber reinforced composite prepreg along the thickness direction, the main direction of the fibers between adjacent layers is rotated around the center of the disc spring at a set angle layer by layer, forming a biomimetic spiral layup structure arranged periodically along the circumferential direction, which simulates the microstructure of the biological fiber layers in the chelate rod spiral area of mantis shrimps, and the SMA wires treated by a coupling agent are embedded in the inner ring and the middle ring of the fiber prepreg. The biomimetic spiral layup structure is constructed layer by layer in the thickness direction of the composite material, and the SMA wire is locally reinforced in the annular part, so that the disc spring realizes the synergistic improvement of the bearing capacity, energy absorption performance and interlayer failure resistance under the premise of lightweight, thereby improving the overall mechanical properties and service reliability.
Owner:ZHEJIANG SCI-TECH UNIV
Error compensation optimization method for piezoelectric displacement stage
This invention relates to the fine control of a piezoelectric displacement stage, specifically to an error compensation optimization method for the piezoelectric displacement stage. The method involves collecting actual and theoretical displacement data throughout the entire stroke of the piezoelectric displacement stage, performing data preprocessing, and constructing an error compensation model for the stage. With the objective of minimizing the average positioning error throughout the entire stroke after error compensation, and considering constraints, an error compensation optimization model is constructed. An improved mantis shrimp optimization algorithm is used to solve the error compensation optimization model, obtaining the optimal error compensation model parameter set. The updated error compensation model is then used to compensate for the error in the piezoelectric displacement stage, and adaptive corrections are made based on the error compensation effect. The technical solution provided by this invention effectively overcomes the shortcomings of existing technologies, such as the difficulty in constructing a more accurate error compensation model and the poor error compensation effect of the piezoelectric displacement stage.
Owner:HEFEI AIMIAO TECHNOLOGY CO LTD
A 4d printed actively responsive and thermally protected biomimetic continuum mechanism
This invention discloses a biomimetic continuous deformation mechanism for active response and thermal protection in 4D printing, belonging to the field of 4D printing and deformation mechanism design technology. The continuous deformation behavior of this mechanism mimics the opening and closing behavior of an apricot blossom, achieving reversible continuous deformation between the unfolded and retracted states through electrical excitation. The main structure is designed with a segmented configuration similar to the abdominal segments of a mantis shrimp, using polymer units embedded with conductive polymers as secondary units. These units are mechanically connected via heat-resistant sleeves and nickel-titanium alloy wires. The built-in conductive polymers are distributed in a serpentine, meandering pattern, supplemented by flexible wires to achieve electrical connections between the conductive polymers within each unit. Based on multi-material combination and structural collaborative design, this invention allows independent control of the continuous deformation behavior and thermal protection function via different input ports, achieving integrated functions such as reversible continuous deformation, active response control, efficient thermal protection, lightweight and high strength, and modular design.
Owner:JILIN UNIVERSITY