Tester for micromechanical properties of biological soft tissue

Abstract

The invention relates to a tester for micromechanical properties of biological soft tissue. The tester comprises a support and a micro force test assembly; the support is provided with a sample test board, a pressure test head facing the sample test board and a driving mechanism driving the pressure test head to move towards the sample test board or move in the direction opposite to the sample test board; the micro force test assembly comprises a first guide pipe, a first piston which is movably connected with the first guide pipe and connected with the sample test board in a supporting mode, a second guide pipe, a second piston movably connected with the second guide pipe, a pressure amplification board connected with the second piston and a force sensor conducting stress testing on the pressure amplification board, wherein the first guide pipe and the second guide pipe are communicated through a hose, and the sectional area of the sample test board is smaller than that of the pressure amplification board. According to the tester, micro force is amplified according to a hydraulic pressure amplification principle, micro displacement is amplified according to a lever amplification principle, and then micro force and micro deformation of the biological soft tissue are tested.

Description

technical field [0001] The invention relates to the field of biomechanics of soft tissues, in particular to a tester for microscopic mechanical properties of biological soft tissues. Background technique [0002] The study of soft tissue biomechanics covers a very wide range, including almost all tissue systems in the human body except bone. These tissue systems include in particular skin, cartilage, connective tissue, muscle and internal organs. The broad scope of biological soft tissue research requires a full range of mechanical performance testing, including compression, tension, torsion, shear, indentation, and fatigue testing. [0003] A major goal of soft tissue research is to characterize the mechanical properties of biological tissue to better design computational models that can better understand various medical conditions, such as internal organ damage and traumatic brain injury during motor vehicle accidents Changes in the properties of materials in the brain, ...

AI Technical Summary

Problems solved by technology

[0005] At present, the test instruments for testing the mechanical properties of biological tissues include Bose 5500 series, Instron 5900, CSMbioindenter series, and TestResource 100 series. Although the basic functions of the product can be tested, it is difficult to test the small deformation and force, and cannot carry out the 5mm scale and below Sample testing, high cost

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