| 摘要 |
A mass flow measuring apparatus (1) is described, having tube (2), which at a first position (P1) is coupled as regards oscillation to a first energy converter (4) and at a second position (P2) is coupled as regards oscillation to a second energy converter (5), and having an evaluating device, the first and the second position (P1, P2) being spaced (L) from one another , the energy converters (4, 5) each being operable as oscillation generator and oscillation detector and the energy converters (4, 5) working alternately as oscillation generators. A method can therefore be carried out in which the tube (2) is caused to oscillate alternately at the first position (P1) and at the second position (P2), signals being measured at the second and the first position (P2, P2). It is desirable to be able to achieve accurate measurements even in the case of a measuring apparatus of small construction. For that purpose, the energy converters (4, 5) are constructed as part of resonant circuits (6, 7; 8, 9) and the evaluating device determines a predetermined parameter of a sympathetic oscillation at the second energy converter (5) after excitation by the first energy converter (4) and the parameter of the sympathetic oscillation at the first energy converter (4) after excitation by the second energy converter (5).
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