Portable strain gauge

The utility model discloses a portable strain gauge, and relates to the technical field of strain gauges. Comprising an object to be detected and a strain gauge body installed in the object to be detected and used for detection, the strain gauge body comprises an end seat A and an end seat B installed at the other end, the end seat A and the end seat B are connected through a capillary tube, and a steel wire is installed in the capillary tube. According to the utility model, the technical problems that the strain gauge body is inconvenient to fix on the surface of the steel structural member for a long time and the follow-up performance is poor during use are solved, the tension of the steel wire is changed due to the relative movement of the end seat A and the end seat B caused by the deformation of the surface of the steel structural member, and the coil part close to the steel wire is used for exciting the steel wire and measuring the resonant frequency of the steel wire. After the vibrating wire reading i