Optical fiber fluid flow velocity detection device

The invention relates to an optical fiber fluid flow velocity detection device. The optical fiber fluid flow velocity detection device comprises a closed air pressure chamber, a flow guide pipe and an optical fiber, the flow guide pipe is arranged in the closed air pressure chamber and penetrates through the closed air pressure chamber; the optical fiber is arranged in the closed air pressure chamber and is wound on the outer wall of the flow guide pipe; an optical fiber includes a core and a cladding covering the core. According to the invention, when the flow velocity of the fluid to be detected is different, the optical fiber deforms differently, so that the output spectrums are different to detect the flow velocity of the fluid, and the detection precision and the detection sensitivity are extremely high. 本发明涉及一种光纤流体流速探测装置，所述光纤流体流速探测装置包括密闭气压腔室、导流管以及光纤；导流管设置在所述密闭气压腔室内且贯通密闭气压腔室；光纤设置在密闭气压腔室内且缠绕在导流管外壁上；光纤包括纤芯和包覆所述纤芯的包层。本发明根据待测流体流速不同时，光纤发生形变不同进而使得输出的光谱不同来检测流体流速，检测精准度与检测灵敏度极高。