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
Semiconductor device and method for manufacturing the same
Power supply input voltage detection circuit
Modified and stabilized GDF propeptides and uses thereof
Data center management unit with improved disaster prevention and recovery
Synthetic bone grafts
PLL circuit
Controlling a resource demand system
  Randomly Featured Patents
Apparatus for handling cartridges in a storage library system
Water-resistant conveyor lubricant and method for transporting articles on a conveyor system
Plasma processing apparatus, semiconductor manufacturing apparatus and electrostatic chucking unit used thereof
Combined container/bottle and cosmetic wand applicators or the like
Transcutaneous transmission patch
Bicycle hub assembly whose length is adjustable
Single coil parallel imaging
Electroacoustic transducer
Process to make 2,3-dihalopropanols
Object detecting apparatus including photosensors for restricted detection area