Foot pad device and method of obtaining weight data
First Claim
1. A method of obtaining weight data from a force sensor in a foot pad worn by a user engaging in a footstep, comprising the steps of:
- a. placing a force sensor under at least one of the ball of the foot of the user and the heel of the foot of the user;
b. receiving an entered patient weight value for the user;
c. collecting force data from the force sensor;
d. calculating a weight value based on the collected force data and a scaling parameter that scales the collected force data;
e. comparing the calculated weight value to the entered patient weight value in a first comparison;
f. comparing the calculated weight value to zero in a second comparison;
g. adjusting the scaling parameter based on at least one of the first and second comparisons; and
h. repeating Steps (c) through (g) periodically.
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Accused Products
Abstract
A foot pad device and a method of obtaining weight data from a force sensor in a foot pad worn by a user engaging in a footstep, including placing the force sensor under the ball of the foot of the user and/or the heel of the foot of the user; receiving an entered patient weight value for the user; collecting force data from the force sensor; calculating a weight value based on the collected force data and a scaling and/or offset parameter; comparing the calculated weight value to the entered patient weight value; comparing the calculated weight value to zero; adjusting the scaling and/or offset parameter; and repeating the steps periodically. The method may include comparing the collected force data to a functionality indication range, flagging the force sensor if the collected force data is outside the functionality indication range, and disregarding force data from the flagged force sensor.
167 Citations
20 Claims
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1. A method of obtaining weight data from a force sensor in a foot pad worn by a user engaging in a footstep, comprising the steps of:
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a. placing a force sensor under at least one of the ball of the foot of the user and the heel of the foot of the user; b. receiving an entered patient weight value for the user; c. collecting force data from the force sensor; d. calculating a weight value based on the collected force data and a scaling parameter that scales the collected force data; e. comparing the calculated weight value to the entered patient weight value in a first comparison; f. comparing the calculated weight value to zero in a second comparison; g. adjusting the scaling parameter based on at least one of the first and second comparisons; and h. repeating Steps (c) through (g) periodically. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of obtaining weight data from a force sensor in a foot pad worn by a user, comprising the steps of:
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a. placing a plurality of force sensors under a foot of the user; b. collecting force data from the force sensor; c. comparing the collected force data to a functionality indication range; d. if the collected force data is outside the functionality indication range, flagging the force sensor as nonfunctional; and disregarding force data from the flagged force sensor; e. calculating a weight value based on the collected force data; and f. repeating Steps (c) through (e) periodically. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A foot pad device worn on the foot of a user for obtaining weight data comprising:
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a foot pad, defining at least one of a ball region located under the ball of the foot of the user and a heel region located under the heel of the foot of the user;
wherein the foot pad is selected from a group of foot pads of different sizes;a plurality of force sensors that provide force data, wherein at least a portion of the plurality of force sensors is located in at least one of the ball region and the heel region; sensor electronics, coupled to the plurality of force sensors, that condition the force data to be within a conditioned force data range;
wherein the sensor electronics include a flexible circuit with a plurality of force sensor connection paths adapted to transmit force data from the plurality of force sensors and defining a plurality of applicable sensor positions;
wherein the plurality of force sensors are located in at least a selected portion of the plurality of applicable sensor positions; anda processor that calculates a weight value based on the conditioned force data. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification