VIBRATION DENSIMETER Russian patent published in 2007 - IPC G01N9/32 

FIELD: measuring technique.

SUBSTANCE: vibration densimeter comprises housing (1) provided with ports (2) and mechanical resonator (3) that receives well fluid through the ports and is made of a round rod provided with plate (4) in housing (1). The free end of rod (3) is interposed between two magnets (5) and (6) with electric coils (7) and (8) whose outputs are connected to the generator in parallel. Magnetic resistive pickup (9) is mounted in the zone of acting of the magnetic flux. Pickup (9) is made of magnetic resistive bridge whose output is connected with the converter of phase-synchronized signal. The pickup is mounted so that the force magnetic fields of electric coils (7) and (8) points in the direction of maximum sensitivity of the magnetic resistive bridge. The magnetic resistive bridge can be replaced by Hall pickup, inductive pickup, or differential-transformation pickup with corresponding transducers.

EFFECT: enhanced precision and reliability.

3 cl, 2 dwg