Engineering Research Equipment: An Automatic 6-DOF Ultrasound Scanner for in situ Mapping of Biological Surfaces

该设备拨款要求为路易斯安那州立大学机械工程系组装的自动六自由度超声扫描系统提供资金。在原位，生物表面几何形状的无损测量，包括皮肤、骨骼、软骨和软骨下骨，将有可能在10-20微米量级的分辨率与所提出的系统。这种水平的分辨率对于建立人体关节运动学和动力学的数学模型是必不可少的。在典型的关节中，短僵硬的韧带和关节表面作为被动约束，补充了肌肉系统的主动约束和控制。在膝关节的正常运动中，韧带的伸长被认为在一毫米左右，而在手指关节中则要少得多。因此，必须以高精度测量表面几何形状，以便建立有意义的数学模型，以描述形成平行系统的关节表面和韧带的被动约束行为。＊＊＊

9412071 Murphy This equipment grant requests funds for an automatic six degree- of-freedom ultrasound scanning system to be assembled in the Mechanical Engineering Department at Louisiana State University. In situ, nondestructive measurement of the geometry of biological surfaces, including skin, skeletal, cartilage, and subchondral bone, will be possible with resolution on the order of 10-20 micrometers with the proposed system. This level of resolution is essential for developing mathematical models of the kinematics and dynamics of human joints. In the typical joint, short stiff ligaments and articular surfaces act as passive constraints, complementing the active constraint and control of the muscle system. Ligament elongations are thought to be on the order of one millimeter in normal movements of the knee joints and significantly less in finger joints. Thus surface geometry must be measured with high accuracy in order to develop meaningful mathematical models of passive constraint behavior of the articular surfaces and ligaments which form parallel systems. ***