A scale estimating method through metric reconstruction of objects using a smart device is disclosed, in which the smart device is equipped with a camera for image capture and an inertial measurement unit. According to the present invention, a fumigant in an ampule or container is inserted into the wooden structure. The substrate comprises a first metal interconnection. The partitioning portion includes a first shifter portion which allows the balancing material held in the first portion to move to the second portion side in association with a swing; and a second shifter portion which allows the balancing material on the second portion side to return to the first portion.