K, sorry, let me clarify. If anything is in front of the sensor, it will chime. There is nothing you could put in front of them ( even on an angle ) that would allow them to function normally.
with that said, if you want to get creative, you can do a few things to fix that.
Buy any bull bar you want, coat the back of the bullbar with a matte type material. Carbon fiber tape works well.
Additionally, you can purchase connectors to MOVE the sensors to the bull bar itself. These will suffice, but it's going to look pretty silly unless you figure out a way to make it look stock.
The sensors push out waves, and when they hit an object, it's returned. The in dash system will know how far away the object is, based on how long it takes to return the signal.
These sensors do not shoot in a straight line. Your entire front bumper is covered by the sensors. So, you can go a route i just suggested, OR, you can purchase a bullbar that sits 10 feet in front of the sensors.
good luckl!
Edit : After re-thinking this, the matte material may not work in your 2015. I've fooled a fewer of the older systems, but i'm going to assume a 2015 might be a bit smarter. I'd hate for you to purchase a bull bar then the tape not work.