| 摘要 |
A multiturn pulley liquid level sensor device for measuring a liquid level in a well and in a container, comprising a mechanical float (12) which is fastened to a fastening rope (11) and which can slide up and down. The fastening rope (11) is installed on one or more pulleys and slides up and down with the float (12), and the pulley rotates back and forth. One pulley is mechanically coupled to one digital absolute magnetic rotation encoder device, and the encoder device is used for monitoring the total rotation angle of the pulley in real time. By way of using an algorithm, the total rotation angle of the pulley is converted into a distance from the bottom to calculate the height of a liquid level. The multiwheel encoder has two reading types, i.e. one is an electrical signal reading type, and the other is an optical signal reading type. The electrical signal output of the encoder can be used as an input of an industrial control system, or is transported to a long-distance remote controller or the Internet through a data passage. The accurate measurement of the liquid level is determined by the number of rotating wheels of the encoder. A mechanical gear or a belt can adjust the total number of pulley rotations which are consistent with the omnidirectional liquid level measurement. |
