Method of setting valid output sections of 2-axis acceleration sensor or 3-axis acceleration sensor

A method of setting valid output sections of a 3-axis acceleration sensor mounted within a tire of a vehicle to measure accelerations in x-axis, y-axis and z-axis directions, comprising:

• setting an output signal of the 3-axis acceleration sensor in the z-axis direction as a reference signal, wherein the z-axis direction is perpendicular to a road surface;
• setting a specific section of the output signal in the z-axis direction as a valid section where a part of the tire where the 3-axis acceleration sensor is mounted contacts the road surface;
• and
• setting sections of output signals of the 3-axis acceleration sensor in the x-axis and y-axis directions corresponding to the valid section in the z-axis direction as valid sections in the x-axis and y-axis directions,
• wherein the specific section of the output signal in the z-axis direction is a section where a positive (+) peak value, a negative (−) peak value, and a positive (+) peak value of the output signal in the z-axis direction are represented.