Using eight suction cup microphones connected to a PIC32 microprocessor, we can turn any surface into a touch surface. It connects to the computer via USB is recognized as a mouse.
The position of the input on the surface is determined by the Time Difference of Arrival (TDOA) of sound waves to the different microphones, a method known as trilateration.
Using a projector connected to a computer, we demonstrate our device by turning a whiteboard into a touch screen interface.
something similar is used to determine where bullet hits the target on modern electronic target systems
EndureTemptation 1 year ago
good
porra71 2 years ago