Abstract
Our feeling measured the part in the manufacture way, removed the pendulum to hang (but is lays aside iron ball), round components and so on stick, rigid box. mounts pastes the situation; In selects on the material, a working costs more inexpensive water pipe(PVC) acts as the main body, therefore all extremely has the superiority in measuring the stability and the economy. Moreover, was different to the formerly optical fiber diffraction grating inclines the sensory element research, except could obtain the angle which inclined also to be possible the affiliation the direction. We use mixes the erbium optical fiber amplifier (EDFA) the output light (ASE) to take the system needs wide frequency light source (BBS),light source after 1:99 coupler, part of light are detected by power,When another part of light through first 3dB coupler, can meet the average to disperse (50/50) to two optical fibers diameters,separately transmits to the reflection wave length shorter Bragg optical fiber diffraction grating (FBG S), the reflection wave length longer Bragg optical fiber diffraction grating (FBG L), This time, will obtain FBG S, the FBG S echo signal. Finally, we then can using optical spectrum analyzer(OSA),power meter read take FBG S, the FBG L superimposition frequency spectrum power as well as the individual frequency spectrum wave length, and according to correlation theoretical calculation ambient temperature as well as angle of tilt size. Present paper use individual frequency spectrum reflection center wavelength change, Surveys the obtained angle at, The accuracy, analysis separately may reach 、 ； Moreover, in temperature survey, Also may the affiliation interpret by the superimposition frequency spectrum power change, The accuracy, analysis separately may reach1.74℃、0.039℃。