UXO DETECTION SYSTEM
March 2019 | White River Technologies| Thayer School of Engineering | Team of 5
Overview
Unexploded ordnances (UXOs) are weapons that did not detonate when intended. They can range from small bomblets to artillery shells. There are an estimated 110 million UXOs worldwide posing a threat to civilians and preventing land development.
White River Technologies (WRT) developed a device that integrates geophysical mapping technology to detect the exact geometry and depth of buried objects. With this device, UXOs can be detected in a safe and cost effective manner.
WRT's system was heavy, bulky, difficult to transport, and took weeks to manufacture, making it inconvenient for users and inefficient to produce. My team at Thayer designed a modified device that is lightweight, more aesthetic, easier to transport, and can be disassembled.
Skills
SolidWorks
Laser Cutting
In-House Manufacturing
Project Management
Finite Element Analysis
Testing
Assembly and Disassembly
WRT’s original design could not be disassembled. Using SolidWorks we modified the device so that each transmitter coil could be easily detached and reattached. In our design we took into account WRT’s in-house manufacturing capabilities and the materials they already order in bulk.
The device can be assembled in under 12 minutes and disassembled in under 7 minutes. This allows for convenient transport overseas and around field sites.
Weight Reduction
We were able to bring the weight of the device down from 74.8 lbs to 52 lbs for a total of a 30% weight reduction. We removed 9 lbs of unnecessary material from the frame without compromising its structural integrity.
Our greatest discovery is that we could use aluminum coil instead of copper coil to reduce the weight by 13 more pounds. The electromagnetic properties of the system were not affected by the difference in coil material.
Cross Section Reduction
Reduced material (left); Original base plate (right)
Material Analysis
In an effort to reduce weight we considered a variety of different materials including delrin, PEEK, fiber reinforced plastic, and nylon. We were looking for something non-conductive, cost effective, strong, durable, weatherproof, and lightweight. FRP met the majority of our specifications and was a material that WRT already orders in bulk for other projects.
Manufacturing Plans
We provided a detailed a manufacturing plan with drawings and step by step directions for WRT to follow when building their new device.
