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LEVEL MEASUREMENT SYSTEM

  • US 20100257931A1
  • Filed: 11/13/2008
  • Published: 10/14/2010
  • Est. Priority Date: 11/13/2007
  • Status: Active Grant
First Claim
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1. A method of determining the location of an interface between two materials within a vessel comprising:

  • (a) providing a plurality of first ultrasound transducers capable of transmitting ultrasound through at least one of said two materials, said first ultrasound transducers being located within a first elongate housing, spaced apart from one another along a longitudinal axis of the housing;

    (b) providing a plurality of second ultrasound transducers capable of receiving ultrasound transmitted by said first ultrasound transducers and generating an electrical signal in response thereto, said second ultrasound transducers being located within a second elongate housing, spaced apart from one another along a longitudinal axis of the housing,(c) each one of said first ultrasound transducers being associated with a respective one of said second ultrasound transducers to form a transmitter-receiver pair, such that ultrasound emitted by one member of said pair may be received by and generate an electric signal in the other member of said pair,(d) locating the first and second housings within the vessel such that the ultrasound transmitted by at least one of the first transducers is capable of being detected by at least one respective second transducer and that the first and second housings containing the transducers are at least partially immersed in at least one of the materials contained in the vessel,(e) transmitting ultrasound from more than one of said first ultrasound transducers to respective second ultrasound transducers and monitoring the signal generated by each of said second ultrasound transducers in response to the ultrasound transmitted by said first ultrasound transducers,(f) comparing the signal generated by the receiving second ultrasound transducer or a parameter calculated from said signal with the signal generated by a different receiving ultrasound transducer or a parameter calculated from said signal to determine whether the acoustic characteristics of the material located between the first housing and the second housing changes between the compared receiving transducers.

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