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Pulsed eddy flow meter

  • US 4,627,294 A
  • Filed: 08/12/1985
  • Issued: 12/09/1986
  • Est. Priority Date: 08/12/1985
  • Status: Expired due to Fees
First Claim
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1. A pulsed eddy flow meter comprising in combination:

  • (a) a flow passage;

    (b) an eddy generating means disposed within said flow passage at one section of said flow passage wherein the generation of eddies in fluid medium flowing across said one section of said flow passage is enhanced when said eddy generating means is in an activated state and the generation of eddies in fluid medium flowing across said one section of said flow passage is suppressed when said eddy generating means is in a deactivated state;

    (c) an eddy sensing means disposed within said flow passage at another section of said flow passage downstream from said one section;

    (d) a transducer converting mechanical effect of eddies on said eddy sensing means to an electric signal;

    (e) a controller receiving said electrical signal from said transducer, said controller imposing one state out of said activated state and said deactivated state on said eddy generating means wherein said controller automatically imposes said activated state following a deactivated state of a predetermined duration and imposes said deactivated state at an instant when said eddy sensing means detects an eddy of an intensity greater than a thresh-hold intensity, which thresh-hold intensity is greater than the intensity of eddies generated by said eddy generating means at said deactivated state and is less that the intensity of eddies generated by said eddy generating means at said activated state; and

    (f) means for obtaining a representative fluid velocity by dividing the distance between said eddy generating means and said eddy sensing means by the duration of the imposition of the most recent activated state.

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