Resources Contact Us Home
Method of operating a continuous wave sonar system

Image Number 3 for United States Patent #6128249.

An improved method is provided for operating a continuous wave sonar syst At time of transmission, a plurality of acoustic pulses are transmitted one right after another. Each pulse has a unique frequency and is of a time duration that is approximately one second long. The pulses are characterized by a separation frequency representing a difference in frequency between numerically successive frequencies. However, the pulses are staggered with respect to frequency. In the preferred embodiment, each successively transmitted one of the pulses is separated in frequency from an immediately preceding transmitted one of the pulses by an amount greater than the separation frequency. These multiple pulses seperated in time and in frequency, reduce the effects of frequency speading caused by the medium, resulting in a sonar with enhanced detection performance.

  Recently Added Patents
Protection circuit, substrate for electro-optical device, electro-optical device, electrophoretic display device, electronic apparatus, and manufacturing method of electro-optical device
5-HT.sub.3 receptor modulators, methods of making, and use thereof
Signal generator
Systems, methods, and apparatus to determine physical location and routing within a field of low power beacons
Wafer level package and fabrication method
Device and method for producing a fluidic connection between cavities
  Randomly Featured Patents
Apparatus for collecting sunlight
Navigation information overlay onto ultrasound imagery
Supply chain demand forecasting and planning
Garnish clip for curtain shield airbag
Gas insulated circuit breaker incorporating complete modular interrupter structure and operating mechanism
Auxiliary active motor vehicle heating and air conditioning system
Trocar including cannula with stepped region
Lamp shade
ESD protection circuit for different power supplies
Navigation apparatus