Camera Intervelometer triggered from ground distance travel

Could anyone help suggesting a camera trigger that could fire DSLR mounted to the back of a moving vehicle?
Ideally it could be adjusted to fire every metre or to metres etc. So it would need to detect movement across the ground surface at set measurements and send voltage to a 3.5mm audio socket output
Any help would be appreciated.
Cheers

Hello @glennn and welcome to the community!

I’m not an expert on the topic but I think you’ll be interested in the following products:


And to detect movement you will probably need a GPS module you can find some options here.