Resources Contact Us Home
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
Method for manufacturing non-volatile memory device, non-volatile memory element, and non-volatile memory device
Generating and using checkpoints in a virtual computer system
Techniques for generating and displaying a visual flow of user content through a social network
Detection of procedural deficiency across multiple business applications
Architecture, system and method for testing resistive type memory
Pre-sealing unit for wire-cut electric discharge machine
  Randomly Featured Patents
Fire containment case for portable battery operated electronic devices
Data reception method
Room temperature-curable polyorganosiloxane composition whose cured products resist soiling
Barrier-slurry-free copper CMP process
Brewing apparatus
Secure data scanning method and system
Nematocidal and fungicidal compositions
Integrated module multi-chamber CVD processing system and its method for processing subtrates
Apparatus for cutting carpet samples
System and apparatus for automatic and continuous monitoring, proactive warning and control of one or more independently operated vessels