Locust Hindlegs' Structure And Morphology Bionic Information Collection And Biomechanics Test

Biomimetic technology as the foreland technology combining with researchof robot accelerates the emergence of study in biomimetic robot. The biomimeticrobot which utilize the modern manufacture technology and control theory torealize special functional robot system through imitating biological structure,morphology, function and theory. It is great promotion in the application level ofmodern biomimetic technology. Collection of geometrical information and model reconstruction for locust'shind leg was exploring researched in this paper through slice method and reverseengineering method, which laid a foundation to study the geometric shape ofinsect legs in the insect bionics.The specimens of locust leg are made by the equipment made in AmericaBuler Corporation. The PHONEX/BETA burnishing machine is used to polish thespecimen layer by layer. And the Olympus SZX12 stereomicroscope is used tosnap each magnified section image. Outline curves of all section images werejointed together with the aid of Pro/E software, a model of locust's leg will be built.In reverse engineering method, the LSV50 3-D laser scanner made in Taiwan wasused to scan the pretreated specimen of locust' hind leg. The point-cloud datacreated by scanner were disposed by means of the reverse engineering softwareEDS Imageware to build model of locust's leg. Compared with the slice method,the reverse engineering method can generate smoother surface with a higherprecision which is adjustable in the scanner by controlling the amount of pointcloud data. However, it is difficult to scan 3-D object with many pits. Comparedwith the reverse engineering method, the slice method needs too much time andmanpower to polish and snap the specimen. The two methods can supplement eachother.Biomechanics is a science to explore life system which has been applied toorganism histology extensively. However, the study on the insects' legs is verylack. Compared with Diestrammena asynamora, in this paper, the biomechanicsperformances of locust hind leg were expounded. The biomechanics test of locust'shind leg, including the tensile experiment on femur, joint and tibia of locust's hindleg was first made with microcosmic friction machine (UMT) in China, and thecorresponding load-displacement curves were obtained.The load-displacement curves were obtained by tensile test about femur, joint,tibia of living locust by which the main biomechanics performance parameterswere analyzed. The femur of locust's hind leg was tensioned to breakage, the loadis 14.5 N, the breaking stress is 37.1 MPa and the extensibility is 0.09;the joint oflocust's hind leg, respectively 6.2 N, 32.6 MPa and 0.20;the tibia of locust's hindleg, respectively 4.7 N, 36.1 MPa and 0.11. In the contrast experiment, thebreaking stress of Diestrammena asynamora's hind leg's femur, joint and tibia is11.5N, 3.3N and 6.2N respectively, respectively. The load-displacement curves oflocust's hind leg and Diestrammena asynamora's leg in tensile tests are similar tothat of soft tissue of biomaterials' stress-strain curve. They all have excursion fromHook's law for the pure elasticity materials. The material of the locust hind legs'epidermis is superior to that of Diestrammena asynamora's in tensile.The research on collecting geometric information of locust's hind leg canprovide the theory basis for the study of biomimetic jumping robot on the part ofthe movement mechanism and design the movement part while the biomechanicsperformance test of locust's hind leg can lay a foundation for the study on materialof robot's movement part. It also contributes to lighten the robot's weight andoptimize the movement performance.Geometric information collecting, 3-D morphological reconstruction andinvestigation of bio-mechanical properties of locust's hind leg can provide certaintheory foundation for moving mechanism and moving element design inbiomimetic jumping robot research. It is necessary technical preparation forbiomimetic structure design, structural analysis and numerical simulation inbiomimetic research. And which contribute to moving element of biomimeticjumping robot in material choosing, biomimetic materials development, structureweight loss, properties optimization.