Hoop type optical fiber grating reinforcement meter

The utility model belongs to the technical field of sensing, specifically relates to a device which is used for detecting the structure safety condition in civil engineering, and specifically relates to a hoop type optical fiber grating reinforcement meter. The hoop type optical fiber grating reinforcement meter comprises upper and lower half hoops of the same structure. The middle part of the upper half hoop is a semi-circular ring. Both ends of the semi-circular ring bend outward to form mounting ears. Bolt holes are arranged on the mounting ears. Upper and lower half hoops are in involutory connection and are fixed through a bolt. A first optical fiber grating is arranged on the peripheral surface of the upper half hoop. A second optical fiber grating is arranged on the peripheral surface of the lower half hoop. The first optical fiber grating is connected with a first pigtail. The second optical fiber grating is connected with a second pigtail. According to the utility model, the hoop type optical fiber g