A Smartphone Step Counter Using IMU and Magnetometer for Navigation and Health Monitoring Applications

. 2017 Nov 8;17(11):2573. doi: 10.3390/s17112573

Algorithm 2. Peak update (

t h_{u}

S_{k - 1}

S_{k}

)

S_{n - 1}

S_{n}

S_{n}

=1 && (

{t_{a}}_{{p e a k}_{k}}

−

{t_{a}}_{{p e a k}_{k - 1}}

t h_{u}

) &&

{a_{p e a k}}_{k} > {a_{p e a k}}_{k - 1}

Return(update-peak)

Elseif

S_{n}

= −1 && (

{t_{a}}_{{v a l l e y}_{k}}

−

{t_{a}}_{{v a l l e y}_{k - 1}}

t h_{u}

) &&

{a_{v a l l e y}}_{k} < {a_{v a l l e y}}_{k - 1}

Return(update-valley)

Else

Return(no-update)