Visual Impairment Aid for the blind

My name(alias) is hackery21. I am a 13 year old living in kansas city and have just invented something really cool that I would like to tell you about. I have invented a personal obstacle detection system for the visually impaired.  My invention allows blind users to scan the area in which they walk as they walk and be informed if there are any obstacles in their path. If there are, a series if vibrations are sent to their fingers. The more vibration you feel, the more close the obstacle. This eliminates the need for a walking stick or guide dog. The invention uses SONAR, just like bats, and then sends the signals to a microprocessor which reroutes them to a series of vibrating motors. 

I thought you might like to hear about it. Get back to me with your thoughts.