Number of steps measuring device, method, and program

A step-counting method comprising:

• a first step of synthesizing respective measured values of acceleration of a plurality of measuring axes measured by a measurement device that measures acceleration of the plurality of measuring axes and calculates synthesized acceleration;
• a second step of:
• calculating a deviation between a body axis direction of a wearer and a coordinate axis of the measurement device;
• and
• calculating acceleration in the body axis direction of the wearer wearing the measurement device according to the respective measured values of acceleration of the plurality of measuring axes and the deviation between the body axis direction of the wearer and the coordinate axis of the measurement device;
• a third step of calculating amplitude of a time variation of the acceleration calculated in the second step;
• a fourth step of setting a reference time for determining one step based on the amplitude;
• a fifth step of detecting walking motion by the wearer based on the synthesized acceleration, a one-step time of the wearer falling within a range of the reference time in the walking motion;
• and
• a sixth step of calculating a number of steps of the walking motion detected in the fifth step.

A non-transitory memory storing a program, that when executed by a computer, causes the computer to perform each step in a step-counting method, wherein the step-counting method comprises:

• a first step of synthesizing respective measured values of acceleration of a plurality of measuring axes measured by a measurement device that measures acceleration of the plurality of measuring axes and calculating synthesized acceleration;
• a second step of:
• calculating a deviation between a body axis direction of a wearer and a coordinate axis of the measurement device;
• and
• calculating acceleration in the body axis direction of the wearer wearing the measurement device according to the respective measured values of acceleration of the plurality of measuring axes and the deviation between the body axis direction of the wearer and the coordinate axis of the measurement device;
• a third step of calculating amplitude of a time variation of the acceleration calculated in the second step;
• a fourth step of setting a reference time for determining one step based on the amplitude;
• a fifth step of detecting walking motion by the wearer based on the synthesized acceleration, a one-step time of the wearer falling within a range of the reference time in the walking motion;
• and
• a sixth step of calculating a number of steps of the walking motion detected in the fifth step.