| 摘要 |
<p>A process for determining the rheological properties of a sample 19 located in a rotary rheometer 100 involves compensating for forces generated during testing by correcting the measurement gap displacement S of the rheometer measurement elements 1a, 1b caused by these forces. Axial forces or forces normal to the measurement plates of the rheometer are detected by a measuring unit 6 and the values are linked to a predetermined calibration function. This function describes a dependence between the detected normal force and a change in the measurement gap height between the plates. A control signal is returned that causes an actuator, such as a piezoelectric actuator 11, 12, to rapidly vary the positions of the measurement plates so that the desired measurement gap is kept constant under different normal force values. Maintaining the height of the measurement gap produces more accurate results for the viscosity parameters of the sample.</p> |
