US 6,397,151 B1 · Impulse force estimating device, impulse force estimating method, and medium storing impulse force estimation program

Abstract

When a person wearing the wristwatch device (11) on his or her dominant arm has struck a blow, an acceleration sensor (12) senses acceleration at regular intervals of time, extracts accelerations x1 to x20 sensed at 20 points in front of the hit point H at which the sensed acceleration changes from positive to negative, and stores them in a RAM (20). The impulse force is calculated by multiplying the accelerations x1 to x20 at the 20 points in front of the hit point H by the weighting coefficients determined on the basis of the accelerations sensed in a trial performance and the actually measured impulse force and stored in a ROM (19). Therefore, the impulse force can be estimated accurately without actually striking a secured object.

Claims20

Dependent claims

An impulse force estimating device comprising:

acceleration sensing means to be attached to a human body, for sensing an acceleration of movement of the human body;
and
impulse force calculating means for calculating an impulse force based on more than one acceleration sensed by said acceleration sensing means prior to a reversal of a direction of the sensed accelerations.

An impulse force estimating method comprising:

an acceleration sensing step of sensing an acceleration of movement of a human body as a result of a striking action of the human body, using acceleration sensing means attached to the human body;
and
an impulse force calculating step of calculating an impulse force based on more than one acceleration sensed prior to a reversal of a direction of the sensed accelerations.

A program storage medium having program codes stored thereon that are readable by a computer for estimating an impulse force, comprising:

computer-readable program code means for enabling an acceleration of movement of a human body as a result of a striking action of the human body to be sensed with acceleration sensing means attached to the human body;
and
computer-readable program code means for calculating an impulse force based on more than one acceleration sensed prior to a reversal of a direction of the sensed accelerations.

Dependencies are inferred from the claim text.

Impulse force estimating device, impulse force estimating method, and medium storing impulse force estimation program

Life of this patent

Impulse force estimating device, impulse force estimating method, and medium storing impulse force estimation program

Life of this patent

Abstract

Claims20