Jhoun J H, Childress D S
Department of Physical Medicine & Rehabilitation, Northwestern University Medical School, Chicago, IL 60611-4496, USA.
Med Biol Eng Comput. 1998 Nov;36(6):772-6. doi: 10.1007/BF02518883.
Diaphragm pressure transducers are designed to measure pressures in fluids, but have also been applied to measuring pressures on soft materials, such as at the interface between the residual limb of a lower-limb amputee and the supporting surface defined by the prosthetic socket. The reliability and accuracy of Kulite XTM-190 transducer as a pressure monitor on soft materials, such as silicone and Pelite was evaluated in three physical model set-ups. The evaluations included the uniform loading of solid disks of silicone and Pelite, the application of air pressure to the core of a contained thick-walled cylinder made of silicone, and the dynamic indentation of a contained solid silicone cylinder. Sensor measurements in all situations were similar to analytical, iterative or finite element solutions when certain conditions were met. These conditions include: (i) lubricating the interface between the soft material and the supporting structure; (ii) calibrating the transducers under surface and material conditions used during measurements; and (iii) using compatible soft materials (e.g. silicone but not Pelite).
隔膜压力传感器旨在测量流体中的压力，但也已应用于测量软材料上的压力，例如在下肢截肢者的残肢与由假肢接受腔定义的支撑表面之间的界面处。在三种物理模型设置中评估了Kulite XTM - 190传感器作为软材料（如硅胶和Pelite）压力监测器的可靠性和准确性。评估包括对硅胶和Pelite固体圆盘的均匀加载、对由硅胶制成的厚壁圆柱体内芯施加气压以及对包含的固体硅胶圆柱体进行动态压痕测试。在满足某些条件时，所有情况下的传感器测量结果与解析、迭代或有限元解相似。这些条件包括：(i) 润滑软材料与支撑结构之间的界面；(ii) 在测量期间使用的表面和材料条件下校准传感器；以及(iii) 使用兼容的软材料（如硅胶而非Pelite）。
