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Desktop 3D Scanner

NextEngine, Santa Monica, CA, offers the Desktop 3D Scanner, a full-color multi-laser scanner that scans complex shapes for CAD and 3D design applications on the desktop. About the size of a cereal box, the scanner connects directly to a PC via USB 2.0. It operates with proprietary MultiStripe Laser Triangulation (MLT) technology that features twin arrays of four Class 1M 10-mW solid-state lasers with custom optics at a 650-nm wavelength. The scanner also features twin 3-megapixel CMOS RGB image sensors, optically synchronous RGB color texture capture, and built-in spatially diverse white-light texture illuminators. Full-color photo data is captured for each surface point, and there is no preset limit for the size of objects to be scanned. Objects larger than 5.1 x 3.8" in macro mode and 13.5 x 10.1" in wide mode can be composite-captured with supplied ScanStudio(tm) software. The unit has throughput of 50,000 processed points per second, and comes with an AutoPositioner(tm) to capture multiple surfaces of objects, and a PartGripper(tm) to secure objects during scanning. For Free Info Visit http://info.hotims.com/10966-120

Posted in: Products

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Motorcycle Design Optimized With Finite-Element Software

Sierra Design Engineering, Mount Aukum, California; BUB Enterprises, Grass Valley, California; and ALGOR, Inc., Pittsburgh, Pennsylvania FEA software was used to analyze key components of a racing streamliner. A streamliner motorcycle designed and built by Sierra Design Engineering and BUB Enterprises achieved a new world-record speed of 350.884 miles per hour last year at the Bonneville Salt Flats in Utah. In 1989, the original engine and transmission were designed by Joe Harralson of Sierra Design Engineering, with the rest of the streamliner being designed and built by BUB Enterprises.

Posted in: Briefs

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Counterrotating-Shoulder Mechanism for Friction Stir Welding

The weights and costs of fixtures for holding workpieces could be reduced. A counterrotating- shoulder mechanism has been proposed as an alternative to the mechanism and fixtures used in conventional friction stir welding. The mechanism would internally react most or all of the forces and torques exerted on the workpiece, making it unnecessary to react the forces and torques through massive external fixtures.

Posted in: Manufacturing & Prototyping, Briefs

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Strain Gauges Indicate Differential-CTE-Induced Failures

Failures are indicated by changes in slopes of strain versus temperature. A method of detecting mechanical failure induced by variation in temperature at an adhesive bond between two materials that have different coefficients of thermal expansion (CTEs) involves monitoring of strain-gauge readings. This method can be regarded as an exploitation of the prior observation that the readings of strain gauges commonly used in tensile and compressive testing of material specimens include features indicative of incremental failures in the specimens. In this method, one or more strain gauges are bonded to either or both of the two materials near the bond between the materials. (The adhesive used to bond the strain gauges would not ordinarily be the same as the one used to bond the two materials). Then strain-gauge readings are recorded as the temperature of the materials is varied through a range of interest. Any significant discontinuity in the slope of the resulting strain-versus- temperature curve(s) is taken to be a qualitative indication of a failure of the bond between the two materials and/or a failure within one of the materials in the vicinity of the bond.

Posted in: Briefs, TSP

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Antibodies Against Three Forms of Urokinase

These antibodies can be used to measure small quantities of three molecular forms of urokinase. Antibodies that bind to preselected regions of the urokinase molecule have been developed. These antibodies can be used to measure small quantities of each of three molecular forms of urokinase that could be contained in microsamples or conditioned media harvested from cultures of mammalian cells. Previously available antibodies and assay techniques do not yield both clear distinctions among, and measurements of, all three forms.

Posted in: Briefs

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Understanding and Counteracting Fatigue in Flight Crews

The materials included in the collection of documents describe the research of the NASA Ames Fatigue Countermeasures Group (FCG), which examines the extent to which fatigue, sleep loss, and circadian disruption affect flight-crew performance. The group was formed in 1980 — in response to a Congressional request to examine a possible safety problem of uncertain magnitude due to transmeridian flying and a potential problem due to fatigue in association with various factors found in air-transport operations — and was originally called the Fatigue/Jet Lag Program. The goals of the FCG are: (1) the development and evaluation of strategies for mitigating the effects of sleepiness and circadian disruption on pilot performance levels; (2) the identification and evaluation of objective approaches for the prediction of alertness changes in flight crews; and (3) the transfer and application of research results to the operational field via classes, workshops, and safety briefings.

Posted in: Briefs

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Laser Scanning System Helps Validate Method for Repairing Space Shuttle Heat Shield

SLP-330 Laser Scanning Probe Laser Design Minneapolis, MN 952-884-9648 www.laserdesign.com The loss of the Space Shuttle Columbia because of damage to its thermal protection system (TPS) during launch spurred a search for methods of repairing the TPS in space; specifically, repairing the Reinforced Carbon-Carbon (RCC) material used to protect the nose cap and wing leading edge panels that experience the most extreme heating — more than 3,000° F — during the return to Earth. In testing possible repair methods, it is critical to accurately measure the complex freeform 3D RCC panel shape after the damage, after the repair, and after tests that simulate re-entry. NASA used the SLP-330 laser scanning probe from Laser Design, integrated with Romer portable coordinate measuring machine (CMM) arms for this task.

Posted in: Application Briefs

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