Tuesday, April 24, 2012

Mobile LiDAR: Law #12

When the system encounters issues, take a breath and reboot

We have all been there; out in the boondocks with only a small section remaining to complete the days’ collections, then almost seemingly on cue, your equipment malfunctions.   Frustration sets in as you see your optimal collection window rapidly dissipating; and the last thing you want to do is waste half of the next morning to re-establish base-stations and calibrate the system, just so you can scan a miniscule segment of corridor, break down the base-stations, and backtrack to where you should’ve already been.

Murphy always seems to have a way to rear his ugly head, and Mobile LiDAR systems have a lot of individual, interconnected components that could fail.  Anyone that uses a computer has undoubtedly experienced unknown fatal errors that can halt productivity and drive you insane (just recently it wasn't the Mobile LiDAR system but a lovely Windows Blue Screen of Death that halted collection); now increase those complexities by a magnitude of six, and you start to get a sense of what a Mobile LiDAR operator can experience.  Unlike in the office environment, Mobile LiDAR failure points are not merely limited to the computer; there’s also the DMI, IMU, Control Rack, GPS (both on-board and base-stations), cameras, lever arms, a plethora of cables, and in the immortal words of Dr. Evil, “frickin’ laser-beams!”

If you’re lucky, an error report or warning will give you a good indication of where the problem occurred, and where you need to begin your examination, but that brings in the infamous “T” word – Troubleshooting.  A singular word that can instantly drive a cold shiver up the spine of any seasoned manager, and a resulting process that can single-handedly destroy your project schedule, or worse, the budget.  Sure, you could classify any activity to remedy an error or issue (especially the easy fixes) as a troubleshooting activities, but to me, “real” troubleshooting typically means “we have no idea what caused the problem, and we’re going to attempt various procedures, that likely won’t work, in a hope we narrow in on the problem”.

Inside the LYNX control rack.

In the heat of the moment, as you’re scrambling to find a solution, don’t let the frustration level build to the point where you blow a gasket and throw a tirade so animated your co-worker feels compelled to record it and post it online.  Nothing good can result from that video going viral and ending up on Tosh.0.  The old adage that sometimes you “lose sight of the forest for all of the trees” can certainly apply.  Step back, take a deep breath, clear your head, and look at it from a different perspective.  Electronics and field equipment can be very finicky sometimes; not to mention introduction of the occasional human error.  Regardless of whether the problem was initiated by a mechanical, or electrical, or a loose nut between the seat and the keyboard, sometimes all you need is that wondrous and magical cure-all…a reboot.

Cheers!
Aaron

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What is Mobile LiDAR?

Mobile LiDAR (Light Detection and Ranging) systems are comprised of vehicle-mounted lasers, cameras and GPS/INS navigation systems to capture highly-detailed and accurate three-dimensional (3D) topographic information for surveying and engineering applications. Michael Baker International became an early adopter of Mobile LiDAR technology by acquiring our first system in 2009, with further expansions in 2014 and 2015 that increased our fleet to four (4) Optech Lynx SG1 Mobile LiDAR systems. Over that period our systems have completed more than 300 projects throughout 29 different U.S. States (and multiple countries), and encompassing hundreds of thousands of miles. Our project portfolio includes applications in roadway design, 3D modeling, railroad corridors, signaled intersections, utility infrastructure, asset management, pavement condition assessment and airport infrastructure.