×

Method and apparatus for testing fluid pressure in a sealed vessel

  • US 5,351,527 A
  • Filed: 12/04/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 12/04/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. An apparatus for sensing pressure in a sealed vessel, said apparatus comprising:

  • transducer means operatively coupled to said vessel for, when energized, transferring energy to pressurized fluid in said vessel, said transferred energy establishing oscillations of the pressurized fluid in the vessel;

    receiver means operatively coupled to said vessel for providing a received electrical signal having a frequency value indicative of a natural frequency of the pressurized fluid in said vessel;

    receiver circuit means operatively connected to said receiver means for providing a fluid resonating signal having a frequency equal to the natural frequency of the oscillating pressurized fluid in the vessel, the natural frequency being indicative of the fluid pressure in said vessel; and

    drive circuit means operatively connected to said receiver circuit means and to said transducer means for initially driving said transducer means with a square wave energy pulse signal and subsequently driving said transducer means with an oscillating energy wave having a frequency equal to said natural frequency of said pressurized fluid in said vessel.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×