Go idea, but I’ll play the devils advocate. Very narrow sensing area, what happens when the metal is outside 3”? Second, would the $$$ make it out of line for a manufacturer to install, thus pricing it out of practical use. Third, do you think there would be a market for the average homeowner to want as an add on? Again, neat idea, but would it be worth the $$$.
#6
Hammermechanicman
Some of the commercial guys hang a harbor freight sweeper magnet on the front of their push mowers.
#7
Scrubcadet10
Will it work in time with the average person pushing the mower and with the mower running at proper RPM?
At 3 or 4 mph walking speed I don't see how it would do any good. Besides, if you're mowing at 3 inches you're probably going to clear a small tool like that anyway. Yeah, you'd need an array of sensors covering the whole width of the mower. And what happens when you're mowing a property that has buried metal debris. I have a few of those. It's going to shut off even though it's no threat to the mower.
Develop an optical system that will detect rocks, stumps and other machine killers that protrude above the cutting height of the mower and then you'll have something.