Flow sensor and method for measuring the volume and/or flow speed of a medium

Flow sensor and method for measuring the volume and/or flow speed of a medium

  • CN 1,973,189 B
  • Filed: 06/06/2005
  • Issued: 04/18/2012
  • Est. Priority Date: 06/04/2004
  • Status: Active Grant
First Claim
Patent Images

1. flow probe comprises:

  • One measuring chamber can be imported and discharge a medium more therein, measure the volume and/or the flow velocity of this medium;

    But the measuring elements of the free rotary ground supporting that in this measuring chamber, is provided with (30,40);

    Two sensors (51,52) in order to measurement magnetic field and/or changes of magnetic field, they are dislocation ground setting against each other on the circumference of same measuring elements (40);

    One conversion equipment (70), this conversion equipment are supplied to the output signal of said sensor (51,52);

    Wherein said two sensors (51,52) send an output signal respectively and supply to conversion equipment (70);

    This output signal is cyclic fluctuation and have a reproducible intermediate value with respect to the position of said sensor (51,52) according to the gear teeth (42) between a minimum value and a maximal value when each a single-wheel tooth (42) and an affiliated teeth groove through one of them measuring elements (40);

    Two sensors (51,52) many 1/4th of tooth pitches of extraordinarily going up of 1/4th or one tooth pitch of dislocation one tooth pitch against each other on the circumference of same measuring elements (40);

    Two sensors (51,52) send same output signal with respect to the same position of gear teeth (42) time;

    Thereby two sensors are because relative dislocation is sent the signal of seeing 90 °

    of mutual displacements from electricity, and the output signal of two sensors (51,52) is the sine wave that depends on the motion of the gear teeth (32,42);

    AndWherein conversion equipment (70) formation makes this conversion equipment formed the output signal (71,72,73) of oneself by the output signal of said sensor (51,52);

    Said oneself output signal is converted into isarithmic value with intermediate value;

    The partial volume of the volume that said isarithmic value representative is carried between two gear teeth (42), thus the measuring elements that can confirm by the position of two measurement value sensors to relate to turn to the direction that flows through with medium.

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