Mechanical Engineering | Open Access Articles

Multi-Diameter Vise Clamp And Collet Jaw, Lloyd D. Snell Nov 2000

Multi-Diameter Vise Clamp And Collet Jaw, Lloyd D. Snell

Lloyd D Snell

A machine vise has incorporated into it a pair of collet jaws that allows for the machining of top surfaces and ends of a held part. The collet jaws are secured to each of the clamping blocks on the machine vise. The collet jaws include at least one collet pocket shaped into the inside surface of each collet jaw. The collet pockets are designed to receive collet pads which are shaped to hold a generally cylindrical part with varying diameters. By having more than one collet pocket within each collet jaw, several different sizes of collet pads can be utilized …

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A New Autonomous Underwater Vehicle For Imaging Research, C. Roman, O. Pizarro, R. Eustice, H. Singh Aug 2000

A New Autonomous Underwater Vehicle For Imaging Research, C. Roman, O. Pizarro, R. Eustice, H. Singh

Christopher N. Roman

Currently, unmanned underwater vehicles either tend to be cumbersome and complex to run, or operationally simple, but not quite suitable platforms for deep water imaging. This paper presents an alternative design in the form of a new low cost and easier to use autonomous underwater vehicle (AUV) for imaging research. The objective of the vehicle is to serve as a readily available and operationally simple tool that allows rapid testing of imaging algorithms in areas such as photomosaicking, 3D image reconstruction from a single camera, image based navigation, and multi-sensor fusion of bathymetry and optical data. These are all current …

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Advances In Fusion Of High Resolution Underwater Optical And Acoustic Data, H. Singh, C. Roman, L. Whitcomb, D. Yoerger Apr 2000

Advances In Fusion Of High Resolution Underwater Optical And Acoustic Data, H. Singh, C. Roman, L. Whitcomb, D. Yoerger

Christopher N. Roman

We report efforts to merge data from the complementary modalities of optical and acoustic sensing for obtaining more accurate representations of the seafloor. We show that the principal obstacles to merging the acoustic and optical imaging modalities are the distortions inherent to each modality. The construction of geometrically accurate photomosaics is dominated by incremental errors arising as individual images are scaled and warped to form the photomosaic. For microbathymetric mapping, principal errors arise from sensor position and orientation calibration parameters that affect our ability to construct maps from sonar data that are commensurate with sensor and navigation resolution. We show …

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Lighting Display And Assembly Kit, Lloyd D. Snell Jan 2000

Lighting Display And Assembly Kit, Lloyd D. Snell

Lloyd D Snell

A versatile lighting decoration has a display sheet fabricated from a transparent and resilient film. An outline of a predetermined shape is marked on the film and a plurality of apertures placed through and along the outline. A string of lights having multiple bulbs, each bulb fitted within a socket adapted for gripping the display sheet, is releasably secured in the apertures to generate a lighted image of the predetermined shape that may be highlighted by one or more additional strings of lights.

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Rapid Solidification: Fundamentals And Modeling, Guo-Xiang Wang, Vish Prasad Dec 1999