Measuring device of biological soft tissue mechanical properties

Abstract

The invention belongs to a measuring device of biological soft tissue mechanical properties. The measuring device comprises a machine frame, wherein a motor seat and a Z-axis automatic slide table mechanism are arranged on a bottom plate of the machine frame; a Z-axis sensor is arranged on the Z-axis automatic slide table mechanism; an object carrying container is arranged on the Z-axis sensor; a Y-axis automatic slide table mechanism and a Y-axis driving guide rail are arranged under an upper plate of the machine frame; a Y-axis driving plate is linked under the Y-axis driving guide rail; the Y-axis automatic slide table mechanism is connected with the Y-axis driving plate; an X-axis driving guide rail and an X-axis automatic slide table mechanism are arranged on the Y-axis driving plate; the X-axis automatic slide table mechanism is connected with an X-axis driving plate; a Y-axis driven guide rail is arranged under the X-axis driving plate; a Y-axis driven plate is linked under the Y-axis driven guide rail; an X-axis driven guide rail is arranged on the Y-axis driven plate; an upper shearing platform is linked on the X-axis driven guide rail; a Y-axis sensor is arranged between the X-axis driving plate and the Y-axis driven plate; an X-axis sensor is arranged between the upper shearing platform and the Y-axis driven plate. The measuring device has the advantages that the structure is light and ingenious; the accuracy is high; the operation is convenient; the portability is realized.

Description

technical field [0001] The invention belongs to the technical field of biomechanics, in particular to a measuring device for the mechanical properties of biological soft tissues. Background technique [0002] At present, most of the mechanical properties measurements of biological soft tissues still stay in the stage of axial tension experiment, such as uniaxial tension and biaxial tension. As an experimental method to explore the mechanical properties of biological soft tissues, axial stretching can reflect the mechanical properties of biological soft tissues to a certain extent. The data obtained from the tensile test cannot fully reflect its complex anisotropic mechanical properties. In order to obtain the mechanical properties of biological soft tissue more comprehensively, we need to adopt another experimental method, that is, shear experiment. Simply put, the shear experiment uses a cubic experimental sample and fixes it on two parallel platforms up and down, one of ...

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Problems solved by technology

[0003] In the existing shearing equipment for measuring the mechanical properties of biological soft tissues, components such as copper rings and stainless steel beams for measuring the force in the X and Y directions are directly connected together, which will cause a large mutual influence between different axes. Moreover, it is non-linear, resulting in large errors in measurement data; in addition, the loading container is fixed on the lower platform, and when the lower platform moves, the physiological solution in the loading container will vibrate, which will bring further errors to the measurement; at the same time, the Z-axis direction is manual Control, inconvenient operation during measurement, difficult to grasp the accuracy

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