Coriolis mass flow measuring device for measuring mass flow of fluid, has vibration absorbers with linear variable hybrid coil having cores whose ends are coupled with measuring tubes such that coefficient Of coupling of coils varies

摘要

The measuring device has an excitation unit that is arranged in central region of a pair of measuring tubes (23,24). Two magnetic vibration absorbers are arranged in the longitudinal direction of measuring tubes, along upstream and downstream of excitation unit. Each vibration absorber is set with a linear variable hybrid coil (22) having cores (20,21) whose ends are coupled with respective measuring tubes (23,24) such that cores are moved relative to each other by oscillations and the coefficient Of coupling between the coils (25-27) varies.