| 摘要 |
In the field of mass flow measuring apparatuses, there is a need for greater accuracy of known devices. The invention concerns an impeller for projecting bulk material that otherwise might fail to contact a mass flow measuring apparatus during normal use. The impeller includes a surface (47') inclined relative to a locus of its travel, whereby centrifugal forces cause granular material engaged by the surface to rise to a peripheral zone (47'') for projection towards a sensor member (55). The invention also relates to a radar Doppler speed measuring apparatus (82) for use in mass flow senors; to methods and apparatuses for compensating for longitudinal inclination of mass flow sensor members; and to methods and apparatuses for calibrating such devices. <IMAGE> |
