VRSim's Lincoln Electric VRTEX simulator.Click image to enlargeBy Kip Hanson

 

Imagine a world where auto mechanics learn to wrench on virtual cars. Carpet layers stretch virtual shag, gardeners trim virtual trees. These are just some of the training scenarios possible if Matthew Wallace has his way.

As CEO of VRSim, East Hartford, CT, Wallace spends his days developing tools for the virtual classroom. SimSpray helps students learn the basics of abrasive blasting and spray painting before ever entering a paint booth. SimBuild teaches practical construction knowledge without having to climb a ladder or wham your thumb with a hammer.

VRSim is also the developer of Lincoln Electric's VRTEX, a product that reduces training costs while developing sound welding skills, in an environment free of sparks, heat and smoke.

"Today's training needs to be done differently than it once was," Wallace says. "You can't rely on people to read a 50-year old textbook and then take a test. That's why we do what we do." What VRSim does is work with industry experts to develop software that simulates real life. Sight, sound and touch are accurately represented as the student operates a spray gun, abrasive blaster or welding gun.

In the case of Lincoln Electric's VRTEX 360, VRSim used high -speed videos of the welding process to construct this virtual world. "This was a collaborative effort between us and Lincoln. The product has to look and feel right or you don't get the necessary suspension of disbelief that is critical to VR. It's a long, detailed and very complex process, but it's fun to do."

This isn't just pretty graphics and some sound effects. Wallace explains that VRSim uses an electromagnetic motion system from Polhemus Corp, Colchester, VTt., to generate and track magnetic fields within the simulator, giving them the ability to measure head and hand positions within 0.5 mm. Gun angles, operator position, material parameters—all are monitored in real-time and the results relayed to a computer for immediate feedback to the student.

"It's not easy," says Wallace. "If it was, more people would be doing it. With our welding product—which has since been purchased by Lincoln Electric—the initial development cycle took around two years. Each process has to be modeled with its own physics package, a way of generating a reasonable facsimile of reality that's good enough for people to train from."

Collaboration is the key word here, and Wallace says he's glad to have a partner willing to take the time necessary to make the simulations more accurate. "They've done an incredible amount to support us, but we're certainly not done. There's lots of cool stuff yet to do."

Kip Hanson is a contributing editor. This email address is being protected from spambots. You need JavaScript enabled to view it.


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