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
Roll of continuous web of optical film laminate and production method therefor
Mobile interactive kiosk method
Surround sound effects provided by cell phones
Purine compounds used as CB2 agonists
Methods and apparatus for processing audio signals
Multilayered material sheet and process for its preparation
Asynchronous line interface rate adaptation to the physical layer with synchronous lines at the connection layer
  Randomly Featured Patents
Coordinate system converter
Ink detecting apparatus and ink package
Vehicle seat structure
Composite shared pole design for magnetoresistive merged heads
Foot protecting cushion for a bed leg
Radiolabelled peptide compounds
Method and device for feeding out fibre pulp
Resistor string with equal resistance resistors
Method and arrangement for arranging an interception-proof optical link
Tuning apparatus for a television receiver including selectively activated amplifier and local oscillator circuits