| 摘要 |
A self-exciting optical strain sensor (20) includes dual parallel bridges (22, 24) having parallel facing surfaces (32, 34). Light energy (38) entering a Fabry-Perot cavity (36) formed by this surfaces (32, 34) induces a periodic buildup and release of energy in the cavity (36) which is directly related to the natural resonant frequency of the bridges (22, 24). Analysis of the intensity of light emitted (50) from the cavity (36) determines the bridge natural frequency. |
