We developed a compact tactile sensor in order to guide the clinician or the self-user for non-invasive detection of lumps. The new design has an advantage over the existing discrete tactile sensors and detection methods by efficiently sensing force distribution over an area without any side effects. The sensor consists of 10×10 infrared emitter-detector pairs, a silicon-rubber elastic pad, and...

This work describes a plantar force measurement system. The MEMS pressure sensor, as the key sensing element, is designed, fabricated and embedded into a flexible silicon oil-filled bladder made of silicon rubber to constitute a single sensing unit. A conditioning circuit is designed for signal processing and data acquisition. The characteristics of the plantar force sensing unit are investigat...

We study the average separation between an elastic solid and a hard solid, with a nominally flat but randomly rough surface, as a function of the squeezing pressure. We present experimental results for a silicon rubber (PDMS) block with a flat surface squeezed against an asphalt road surface. The theory shows that an effective repulsive pressure acts between the surfaces of the form p∼exp(-u/u(...

Introduction. In this work the dynamic contact of a hemispherical indenter covered by a thick viscoelastic layer and pressed against a flat rigid surface is modeled. The goal is to investigate the dynamic behavior of robotic fingertips composed by an inner rigid structure covered by a soft layer, mimicking the human biological model. A quasi-linear model, frequently used to describe the behavio...

Abstract One of the most extensively utilized structural control devices is viscoelastic damper (VD), and significant study has gone into enhancing their efficiency in structures. The mechanical response a VD supplied with silicone rubber as material (SRD) under various loading conditions investigated this research. A conventional SRD, which made up dual layers mounted between three steel plate...

Group VII atom containing polymers such as chlorine rubber, and fluorine rubber tend to show a high degree polarity due to their high molar attraction constants [1]. Their practical applications include molded parts, cable, hose, o-rings, etc., which require chemical resistance. In molding the final products, there are several problems such as shrinkage, porosity, blisters, poor knitting, backr...

Carbon, silica etc are added to natural rubber as filler to improve the mechanical properties. In the present study, a natural filler lignin was incorporated into natural rubber which was coagulated by microorganism rather than conventional method of using acid and was tested for their mechanical and wear behavior. The advantages of natural fillers are their low density, renewable character and...

Consumers frequently demand the right to control and select their environment with respect to colors, texture, temperature, humidity, odors, light, and sound. Carpeting constitutes a major environmental surface for both residential and commercial establishments. One implication is that the dyeing and finishing industries are constantly challenged to provide carpeting with desired and needed fun...