Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Ultrasonic tracking system










Image Number 4 for United States Patent #4980871.

An ultrasonic tracking system comprising a transmitting unit and a drive unit. The transmitting unit is carried by the subject to be tracked and produces brief, periodic ultrasonic bursts. The drive unit has an ultrasonic receiver and a motorized assembly capable of tilting and panning an attached camera in response to control signals from the receiver. This receiver employs three ultrasonic microphones located at three of the four corners of an imaginary square centered on and perpendicular to the axis of the camera lens. The receiver measures the relative arrival times of signals received by the microphones, determines the direction and degree to which the camera is not pointed directly at the subject, and supplies control signals to the motorized assembly, to drive motors to re-orient the camera (and receiver) to point toward the subject.








 
 
  Recently Added Patents
Monitoring cloud-runtime operations
Regenerative braking control to mitigate powertrain oscillation
Method of creating exercise routes for a user and related personal navigation device
Liquid crystal display apparatus
Brushless motor drive apparatus and drive method
Bicyclic azaheterocyclic carboxamides
Method and structure for adding mass with stress isolation to MEMS structures
  Randomly Featured Patents
Engine exhaust purification device
Schottky diode manufacturing process employing the synthesis of a polycrystalline diamond thin film
Fly-by serial bus arbitration
Catheter having plurality of stiffening members
Chip stack and method of making same
System and method for communicating in a point-to-multipoint DSL network
Fiber treatment compositions and methods for the preparation thereof
Change management
Marine propeller including fish line trap
Contact for an interposer-type connector array