Raspberry Pi Forums

I'm trying to do a simple DIY project and one of the crucial problems is figuring out the question: "Given that I'm idle in my car and there's also an idle car in front of me (stuck in traffic situation), I need to determine when it is moving away from me (moving traffic)." I've considered using a proximity sensor but I need to be careful about its range capability. Also ideally I want my system to be placed inside my car's dash, but concerned that going the sensor approach would erroneously detect the windshield's distance instead of that of the car in front, unless of course I install it outside of my car. Or is there a non-hardware/computer vision approach to solve this problem? Or even better, is there a existing, reusable product/solution that I can purchase and I can simply tap into its API to solve my problem? Sorry if my question is a bit open ended. Any suggestions are appreciated. Thank you!

I'd try to pirate a range sensor from an autofocus camera. For it to be reliably not distracted by the windshield mount a sensor someplace like behind the grill. Most are infrared I think, there might be ultrasonic ones. Laser is also possible. I think I've seen them advertised at surplus places. Something here maybe: https://www.allelectronics.com/category ... ces/1.html

This is what I was thinking of http://www.goldmine-elec-products.com/p ... ber=G21411

I think that you would need to place the sensor outside your car probably inside your grill or something like that.

Look at the "time of flight" sensors used by drones.They r an IR distance sensor good for about 20m or something like that