Abstract A portable pneumatic video-tactile sensor for determining the local stiffness of soft tissue and the methodology for its application are considered. The expected range of local elastic modulus that can be estimated by the sensor is 100 kPa–1 MPa. The current version of the device is designed to determine the characteristics of tissues that are close in mechanical properties to the skin with subcutis and muscles. A numerical simulation of the contact between the sensor head and the soft tissue was performed using the finite-element method. Both 2D and 3D models were developed. Results of experiments with device prototype are used for approval of adequacy of mathematical modelling in case of large deformations. Simulation results can be used to create soft tissue databases, which will be required to determine the local stiffness of soft tissues by the sensor. 2D model proved to be more efficient for the chosen range of values of local stiffness of soft tissues.

中文翻译：

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两个可变形轴对称体接触的 2D 和 3D 模拟比较

摘要 考虑了一种用于确定软组织局部刚度的便携式气动视频触觉传感器及其应用方法。传感器可以估计的局部弹性模量的预期范围是 100 kPa–1 MPa。该设备的当前版本旨在确定机械性能与皮下组织和肌肉皮肤接近的组织的特征。使用有限元方法对传感器头和软组织之间的接触进行了数值模拟。开发了 2D 和 3D 模型。在大变形的情况下，设备原型的实验结果用于批准数学建模的充分性。仿真结果可用于创建软组织数据库，这将需要传感器确定软组织的局部刚度。2D 模型被证明对于软组织局部刚度值的选定范围更有效。