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
Domain isolation through virtual network machines
Engineered enzymes with methionine-gamma-lyase enzymes and pharmacological preparations thereof
Herbal composition for the treatment of wound healing, a regenerative medicine
Lubricant coating device and image forming apparatus
Consistent retention and disposition of managed content and associated metadata
Semiconductor device
Method for automatically estimating inertia in a mechanical system
  Randomly Featured Patents
Vacuum skin packaging laminate, package and process for using same
Ignition device for internal combustion engine and a manufacturing method therefor
Mowing machine
Digging hardware signaling apparatus
Violation alert speed display
Reflection-testing device and method for use thereof
Apparatus and method for defining a pattern on a substrate
Fruit ripener
Recording member pressing device in a printer
Access control method for shared duplex direct access storage device and computer system therefor