Special Coverage


Technique for Finding Retro-Reflectors in Flash LIDAR Imagery

Orbital rendezvous and docking of two spacecraft is a topic of continued interest to NASA. For crewed missions, it is frequently the case that the target is cooperative (i.e., is equipped with some sort of navigation aid). If one of the relative navigation instruments is a Flash LIDAR, then this aid may be a suite of retro-reflectors. One of the most difficult aspects of this problem (especially at close range) is finding the retro-reflectors in a Flash LIDAR image amongst a substantial amount of clutter.

Posted in: Physical Sciences, Briefs


Reducing Drift in Stereo Visual Odometry

The drift was reduced from an uncorrected 47 cm to just 7 cm. Visual odometry (VO) refers to the estimation of vehicle motion using onboard cameras. A common mode of operation utilizes stereovision to tri angulate a set of image features, track these over time, and infer vehicle motion by computing the apparent point cloud motion with respect to the cameras. It has been observed that stereo VO is subject to drift over time.

Posted in: Imaging, Briefs


Frame Grabber Deployed in Robomotive Humanoid Robot

Robomotive and other humanoid robots equipped with 3D vision sensors are playing an increasing role in industrial automation, including in smaller binpicking set-ups where parts are constantly changing.

Posted in: Imaging, Application Briefs


Measuring Motion with Imaging Software

High-speed photography is as much of an engineering tool as an oscilloscope, spectrum analyzer, or logic analyzer. The photographic technique enables us to visualize and analyze motion, especially motion that is too fast for the human eye or conventional cameras to perceive.

Posted in: Imaging, Articles


LED Illumination in Simulation and Training

Since its inception, projection has been the dominant technology for displaying large, high-resolution images. Over the years, projectors have evolved to keep pace with advances in computer graphics and video sources, following the trends toward ever higher resolutions and ever larger screens.

Posted in: Imaging, Articles


How to Avoid Bearing Corrosion

This white paper explains how to avoid bearing corrosion and examines the most common corrosion protection options. It identifies five critical service conditions design engineers should consider early on: not just performance requirements (load, accuracy, fatigue life, etc.), but the kind of contaminants, materials corrosion resistance ratings, frequency of maintenance, and extreme environments.

Posted in: Mechanical Components, White Papers


$19 Million Funding Awarded for Additive Manufacturing Projects

Fifteen projects have received funding for applied R&D projects in additive manufacturing. America Makes, the National Additive Manufacturing Innovation Institute, announced the 15 awardees of its second call for additive manufacturing (AM) applied research and development projects. Driven by the National Center for Defense Manufacturing and Machining, America Makes will provide $9 million in funding toward these projects with $10.3 million in matching cost share from the awarded project teams for total funding worth $19.3 million. The projects are expected to commence in early Spring.

Posted in: Medical, Briefs, MDB