1. The method to measure body's inertial mass is proposed by measuring period of vibration with the integrated hall switch sensor, when spring oscillator is in situation of simple harmonic vibration.

2. The inertial mass and gravitational masses of a body are customarily set equal for convenience.

3. Let us, for the sake of simplicity, call the mass determined in the first way the inertial mass and that determined in the second way the gravitational mass.

4. In this paper , With the help of usual experimental mechanics instruments, We introduce several kinds of methods of measuring the inertial mass.

5. Capacitive detecting method has been employed to sense the displacement of the inertial mass, caused by inertial forces in any direction.

6. The fundamental principle of inertial navigation is based on the principle of equivalence of inertial mass and gravitational mass.