The invention discloses a mobile terminal based tumble detecting method. The mobile terminal based tumble detecting method comprises the steps as follows: detecting a total accelerated velocity SVM1 and judging whether the total accelerated velocity SVM1 exceeds a set
weightlessness threshold Amin; when SVM1 is smaller than Amin, detecting and synthesizing a direction
signal omega1 and judging whether the direction
signal omega1 exceeds a set inclination angle threshold omegamin; when the
omega1 is smaller than the omegamin, detecting a total
angular velocity omega and judging whether the total
angular velocity omega exceeds a set
angular velocity threshold omegamin; when the omega is greater than the omegamin, detecting a total accelerated velocity SVM2; when the total accelerated velocity SVM2 is greater than a set
impact acceleration threshold
Amax within a set detecting time t1, detecting and synthesizing a direction
signal omega2 and judging whether the direction signal omega2 exceeds a set
human body tumble gradient threshold omegamax; when the omega2 is less than the omegamax, indicating that the person has tumbled;
processing a signal judging that the person has tumbled into a voice prompt signal and an
image display signal. By referring to the feature acceleration, the
human body inclination state, the angular velocity and the like in the tumble process of the
human body and using a built-in sensor in a
mobile phone to obtain necessary parameters, the mobile terminal based tumble detecting method can analyze and judge whether the person tumbles.