From an article in Naval Sea Systems Command about Norfolk Naval Shipyard.
Code 268 Engineering Technician Jason Ewick and Code 2340 Assist Shift Test Engineer (ASTE) Joey Hoellerich were brought into the NNSY Technology and Innovation (T&I) Lab, a group dedicated to bringing the real ideas and technologies of the shipyard to the forefront. With their arrival to the team, both were given the unique opportunity to share knowledge with Puget Sound Naval Shipyard and Intermediate Maintenance Facility (PSNS&IMF), using laser scanning to provide accurate measurements for shipboard work.
“The USS Dwight D. Eisenhower (CVN 69) was at NNSY in years past, Naval Air Systems Command (NAVAIR) brought Puget Sound representatives to our shipyard to use their laser scanning technology to cut off all added material from four sponsons onboard the vessel,” said NNSY T&I Lab Lead Dan Adams. Sponsons are the projections extending from both sides of the watercraft to provide protection, stability, mounting locations, etc. “During the time, we observed the process and wanted to learn what we could from our sister shipyard team.”
The team from PSNS&IMF returned to NNSY to give guidance on the process, with Code 290 representative Dan Hager, and Shop 11 Mold Loft representatives Jason Anderson and Jeremiah Swain taking charge in sharing what they knew to Ewick and Hoellerich.
“The team from Puget was absolutely amazing and shared the ins and outs of the 3-D scanning technology with us,” said Ewick. “I had done laser scanning work in the private industry but it was my first time tackling something like this. Hager, Anderson, and Swain guided us through each step, sharing as much knowledge as they could with us about two different processes we could use to get the results we needed.”
The first process is photogrammetry, where you place targets an inch apart on a desired object or space for scanning. Once complete, you take multiple photographs which are then compiled into a software to build the 3-D model.
The second process is the 3-D laser scanning, which requires more space for a larger read. The targets would be placed and then someone would operate the laser tracker and scanner from the pier to get the scan needed. Once completed, the 3-D model would be compiled in the software for use.
With the knowledge provided by PSNS&IMF and USS George H.W. Bush (CVN 77) in drydock, Ewick and Hoellerich were ready to tackle the process for NNSY.
“We began at Colonna’s Shipyard in Norfolk where the sponsons are being produced,” said Ewick. “We use the scanning technology to analyze where the sponson would meet the shell of the ship. It helps provide an accurate measurement for our workers when it comes to installation and repair.”
Next up was scanning after the pieces were installed. At this time three of the four sponsons have been installed onboard the Bush.
For the full article on Norfolk Naval Shipyard click here.
