Abstract: Provided herein are a three-directional accelerometer and a method for manufacturing the same. The three-directional accelerometer includes a three-layer frame, a core mass, three sets of spring leaves and three sets of optic fiber Bragg gratings (FBG's). The spring leaves that react to seismic motion of the mass are aligned perpendicular to one another in three dimensions. The spring leaves are significantly smaller in thickness than width, thus creating significant differences in moments of inertia, making the spring leaves sensitive only to mass vibration or acceleration in one direction. One set of FBG is responsible for sensing the corresponding mass vibration in one direction. The natural frequency in any direction can be adjusted by varying the mass/dimensions of the core mass, corresponding frame and stiffness of the spring leaves.

Abstract: Provided herein are a two-directional inclination sensor for sensing an inclination of a structure and a method for manufacturing the same. The two-directional inclination sensor includes a main body of a monolithic piece configured to be installed in the structure for sensing the inclination. The main body includes a first section, a second section, a first resilient device connected between the first section and the second section and susceptible of bending along a first direction, a third section including a single-piece weight, and a second resilient device connected between the second section and the third section and susceptible of bending along a second direction. The main body is formed by a machining process to remove parts of a monolithic blank.

Abstract: A foldable electronic device including a first frame, a second frame, a first connecting rod, and a second connecting rod is provided. The first connecting rod has a first end and a second end, wherein the first end and the second end are respectively pivoted on one side of the first frame and the second frame. The second connecting rod has a third end and a fourth end, wherein the third end and the fourth end are respectively pivoted on the other side of the first frame and the second frame. The first connecting rod is suitable for rotating along a first axle, and the second connecting rod is suitable for rotating along a second axle, wherein the first axle is not coaxial with the second axle.

Abstract: A foldable electronic device including a first frame, a second frame, a first connecting rod, and a second connecting rod is provided. The first connecting rod has a first end and a second end, wherein the first end and the second end are respectively pivoted on one side of the first frame and the second frame. The second connecting rod has a third end and a fourth end, wherein the third end and the fourth end are respectively pivoted on the other side of the first frame and the second frame. The first connecting rod is suitable for rotating along a first axle, and the second connecting rod is suitable for rotating along a second axle, wherein the first axle is not coaxial with the second axle.