Vibration method and apparatus for measuring the level of material in a container

摘要

The method and apparatus for measuring the level of material in a container wherein a rope is stretched under constant tension between an anchor in the container and a fixed point. The level of material in the container surrounds the rope leaving a free portion above it. The length of the free portion varies directly to the amount of material in the container. The rope is excited and caused to vibrate and the responses of vibration such as wave length, amplitude and frequency are sensed and measured. These responses vary with respect to the length of the rope and therefore the measurement obtained is in direct proportion to the amount of material in the container.