Multi-degree-of-freedom macro-micro driving platform for testing mechanical properties of irregular cartilage surface

Abstract

The invention relates to a multi-degree-of-freedom macro-micro driving platform for testing the mechanical properties of an irregular cartilage surface, and belongs to the field of precision driving.The multi-degree-of-freedom macro-micro driving platform comprises a macro-micro driving module, a clamping module and a sensing and detecting module, wherein a six-degree-of-freedom macroscopic rigiddriving structure of the macro-micro driving module is mounted on a base, and a three-degree-of-freedom microcosmic driving flexible spherical hinge structure is connected between the six-degree-of-freedom macroscopic rigid driving structure and the clamping module; through mutual cooperation of the six-degree-of-freedom macroscopic rigid driving structure and the three-degree-of-freedom microcosmic driving flexible spherical hinge structure, rigid-flexible coupling driving of the platform is realized; and the sensing and detecting module is fixedly arranged on an upper moving plate of the six-degree-of-freedom macroscopic rigid driving structure, feeds back accurate regulation and control in real time and locates a micro-area to be tested. The platform has the advantages that under the condition that the probe does not move and does not damage the cartilage structure, the complete microscopic mechanical properties of cartilage, such as distribution characteristics of mechanical properties such as cartilage surface global hardness, Young modulus and friction coefficient, are measured.

Description

technical field [0001] The invention relates to the field of precision driving, in particular to a rigid-flexible coupling macro-micro-drive test auxiliary instrument, especially a multi-degree-of-freedom macro-micro-drive platform for testing the mechanical properties of irregular cartilage surfaces, which is a multi-degree-of-freedom rigid-flexible coupling A miniaturized testing platform for the mechanical properties of irregular cartilage surfaces combined with macro and micro drives and irregular surface cartilage placement and clamping devices. Background technique [0002] The surface of cartilage is an irregular curved surface. The mechanical performance test of the micro-area on the surface requires precise positioning of the micro-area, and the multi-degree-of-freedom movement of the loading platform is required to realize the positioning and regulation of the micro-area, especially the nano-indentation and scratching of the micro-area. Testing requires higher posi...

AI Technical Summary

Problems solved by technology

[0002] The surface of cartilage is an irregular curved surface. The mechanical performance test of the micro-area on the surface requires precise positioning of the micro-area, and the multi-degree-of-freedom movement of the loading platform is required to realize the positioning and regulation of the micro-area, especially the nano-indentation and scratching of the micro-area. Testing requires higher positioning accuracy and more degrees of freedom. Existing platforms can support regular square specimens, and can only achieve translation in the X and Y directions. Most of them are ordinary square fixtures. , the fixture uses the screw connection to clamp and tighten the specimen, it is difficult to clamp irregular shapes, the size of the clamp is limited, it is difficult to meet the required composite working conditions, and it is not convenient to carry out the micromechanical performance test of cartilage

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