So the plan is to have the software step the motor rapidly back and forth at a frequency that sweeps gradually from less than twice the expected resonant frequency to more than twice-and have the operator watch to see when there is a null point at the center of the belt and hit a key on the keyboard . . . then the software can note the frequency that it's using at that instant, figure out the tension in the belt and display it for the operator.
32.
Other studies have shown this process of the winnowing of sediment grain size from the effect of hydrodynamic forcing; Wang, Collins and Zhu ( 1988 ) qualitatively correlated increasing intensity of fluid forcing with increasing grain size . " This correlation was demonstrated at the low energy clayey tidal flats of Bohai Bay ( China ), the moderate environment of the Jiangsu coast ( China ) where the bottom material is silty, and the sandy flats of the high energy coast of The Wash ( U . K . ) . " This research shows conclusive evidence for the null point theory existing on tidal flats with differing hydrodynamic energy levels and also on flats that are both erosional and accretional.
