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Research on measurement and modeling of the gastro intestine's frictional characteristics

机译：胃肠道摩擦特性的测量与建模研究

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The frictional characteristics of an intestine are required basically for the development of a noninvasive endoscope for the human intestine. The frictional force is tested by measuring the current of the motor hauling the frictional coupons at an even speed. A multifunction data acquisition device with model NI-6008 USB is used and the data process is performed on the Labview software. Two kinds of materials with aluminum and copper are used. The surfaces are designed as triangle, rectangular, cylindrical and plane forms. The tested results indicate that the frictional resistance force includes the nominal frictional force and the visco-adhesive force. When the surface contour changes from the triangle to the rectangular, to the cylindrical and finally to the plane, the nominal frictional coefficients will decrease and the visco-adhesive force will increase. The nominal frictional force is related to the elastic restoring force, the real frictional force and the contact angle. The cohesive force is determined by the contact area and the contact angle. This research will provide some preliminary references to the design and the parameter selection of locomotion devices in the human gastro-intestine.
机译：肠的摩擦特性对于开发用于人肠的非侵入性内窥镜基本上是必需的。通过测量以均匀速度牵引摩擦试样的电动机的电流来测试摩擦力。使用具有NI-6008 USB型号的多功能数据采集设备，并在Labview软件上执行数据处理。使用铝和铜两种材料。这些表面设计为三角形，矩形，圆柱形和平面形式。试验结果表明，摩擦阻力包括标称摩擦力和粘着力。当表面轮廓从三角形变为矩形，再到圆柱体，最后变为平面时，标称摩擦系数将减小，粘粘力将增大。标称摩擦力与弹性回复力，实际摩擦力和接触角有关。内聚力由接触面积和接触角决定。这项研究将为人体胃肠运动装置的设计和参数选择提供一些初步的参考。

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