It doesn't sound like technology related to my particular groove of engineering, but I do attend a couple of conferences regularly.
I rarely visit the vendors at all. When I do, it is because I have a specific issue I am trying to deal with and use it to brainstorm possible solutions, to visit a friend I know is going to be there, or to rip into a vendor who has been peddling junk information to make people think their product is required by new regulation. Loudly. So with probably a thousand hours of conference attendance, I've spent less than 3 talking to a vendor about their product. You people just generally are not useful.
So if you really want to get the information out there, not to "sell" but to just increase awareness of the current technological capabilities, what you want to do is present. Put together an honest-to-god analysis of the problem people currently have that you can solve. Then present that at the conference as an actual session, and mention they can chat with you more in the trade show after. You're going for a technical enough presentation such that it can count toward continuing education requirements. Ask for questions and in particular take note of anyone who seems like they were disappointed in what you had to say. Those were the people who came to your talk with a problem that you didn't solve. Chase them.
Hopefully that's helpful. I don't know of any specific conferences for that sort of thing you described though.
