Abstract
As a method to measure fluid pressure, it is known to detect the displacement of a diaphragm electrically. However we must pay attention to measure the data under the condition of bad environment electrically and take steps to eliminate electrical noise if it is existed.
We conceived of the method to detect the displacement of a diaphragm optically with adopting newly developed our original special filter. We developed optical pressure sensor system using optical fiber for signal transmission lines, and evaluated its ability.
