One of my students said when he began he used to clamp down the rugs and run a leaf blower under them, and they shook the heck out of the rugs and dusted them. We used to do the same with air movers.
The new air duster tool is something you could likely DIY - it is not at the level of the Auserehlian compressed air tool, which is a completely different level of dusting - and honestly not something many of us would invest in, in terms of not just the dollars but the containment required to hold all that dust that comes out. You must wear PPE with a respirator.
But the idea is a good one, because when you badger a rug to death, you have no suction, so you need to get rid of the soil somehow - it's just a shame that now you have two pieces of equipment required. Some of us use upright vacuums and vacuum across the back to beat, and vacuum up the soil from the front. However, I am looking at the new duster tumbler that Centrum Force had at the last show here in Vegas. That's an interesting concept - and I like the mechanized component so you don't need a person operating it. But I am sure it's pricey as all the mechanized options are in this field.
Lisa