| 摘要 |
<p>Electrical signal relating to a property of a mass flow under consideration is determined at certain instants of time or continuously during the entire process by means of a sensor system (1). The second time derivative of this signal is obtained by means of differentiating unit (4). The mass flow is determined by a sum involving constants and this time derivative in the first, second and third powers. Control of the unit (14) adjusting the mass flow takes place depending on either the actual value of the mass flow or the difference between its actual value and a specified value, or (as a further alternative) dependent on predetermined threshold values.</p> |
