The turbine flow meter has a turbine, which needs to be installed in the fluid pipeline when in use, and its two ends are supported by bearings. When the fluid passes through the turbine, the fluid impacts the turbine blade and drives the turbine blade to rotate. The measuring instrument of the turbine flow meter indirectly measures the flow through the angular velocity of the turbine blade. The method is that the angular velocity of the blade is directly proportional to the fluid velocity.
The angular velocity is detected by the sensing coil installed in the casing. When the turbine blade cuts the magnetic line of force generated by the permanent magnet in the casing, the change of magnetic flux of the sensing coil will be changed. The sensing coil sends the detected periodic change signal of magnetic flux to the amplifier of the measuring instrument to amplify and reshape the signal.
