In case you missed it, click Here to read PART 1 of What’s In Our (Data Collection) Toolbox?
Jon W. Adams, Director of Architectural and Heritage Services ::::
DJS Associates utilizes a number of different tools to collect important data. Whether we are working on a forensic case, capturing as-built measurements for AEC documentation, or digitally preserving important historic landmarks, it is always important to have the right tool for the job. We previously discussed our use of DSLR cameras, video recording systems, and Unmanned Aerial Systems (UASs). Here, we will look at our use of 3D laser scanning technology, and some of our laser scanners.
Handheld laser scanners utilized by DJS technicians allow us to capture to-scale, high accuracy measurement data in a variety of scenarios where access is limited, and can additionally be used to supplement larger datasets collected by our terrestrial laser scanners.
One of the main advantages of utilizing handheld laser scanners is the ability they provide the user to move freely while collecting data. By simply moving around an object or area of interest, we are able to collect data across multiple surfaces, while a monitor provides visual feedback of coverage. In a matter of minutes, large amounts of data can be collected, providing an accurate record of the area/item in question.
Handheld laser scanners vary in accuracy and resolution. DJS utilizes handheld laser scanners which can achieve 0.1mm accuracy and 0.5mm resolution. This allows us to precisely document highly detailed objects.
In contrast to handheld laser scanners, terrestrial laser scanners are most often static in nature. The laser scanner sits atop a tripod, and internal motors rotate the unit along its vertical axis. While this rotation is occurring, a mirror rapidly oscillates, sweeping a laser across all visible surfaces within its range.
Terrestrial laser scanners are utilized daily by DJS technicians to document accident scenes, vehicles, buildings, and historical landmarks. These scanners are employed to collect high-resolution, highly accurate measurements over large areas in critical areas. Scans captured typically have a resolution of 5mm, and each point has a maximum accuracy of 2mm.
For additional information, please contact Jon W. Adams, Director of Architectural and Heritage Services, at 215-659-2010 or via email at experts@forensicDJS.com..