Patent ID: 6229297
Filing Date: 2001-05-08
Classification: H04N

Abstract:
A velocity sensing device for determining the velocity of an object relative to a first axis wherein said first axis is located on a surface, said velocity sensing device comprising:a first profilometer attachable to said object;a second profilometer attachable to said object at a predetermined distance from said first profilometer, wherein said first profilometer and said second profilometer are located along a second axis and wherein said first axis is substantially parallel to said second axis; anda processor adapted to:receive a first signal from said first profilometer and a second signal from said second profilometer wherein said first signal is time shifted relative to said second signal;determine said time shift between said first signal and said second signal; anddivide said predetermined distance between said first profilometer and said second profilometer by said time shift to determine the velocity of said object relative to said surface.