Method and system for analyzing a movement of a person
First Claim
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1. A method for analyzing movement of a person, the method comprising:
- a) measuring 3D kinetic data as the person ambulates with a pair of force sensors affixed to a person'"'"'s ankles, feet, shoes or lower limb prostheses with each of the pair of force sensors on a different one of the person'"'"'s ankle, feet, shoes or lower limb prostheses, sensing at least pressure force or vertical force, anterior/posterior shear force, and medio/lateral shear force with at least three-axis sensors, storing the 3D kinetic data to a digital memory device, producing a left or right side identified vector quantity with a mobile processor, and wirelessly transmitting the 3D kinetic data at 60 Hz or greater with a transceiver to a computer with a processor and a transceiver;
b) obtaining 3D kinematic data as the person ambulates with at least one video camera that video records the person ambulating without markers on the person and in an environment without force-sensing plates;
c) temporally synchronizing the kinetic data from the pair of force sensors and the kinematic data from the at least one video camera together using the processor of the computer by;
creating a visual event in the 3D kinematic data captured by the at least one video camera and a force event in the 3D kinetic data sensed by at least one of the pair of force sensors;
orsending a time signal from the computer to the pair of force sensors and the pair of force sensors transmitting a time-stamped vector quantity to the computer; and
d) simultaneously outputting the 3D kinetic data and the 3D kinematic data, and saving the 3D kinetic data and the 3D kinematic data together as a data file.
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Abstract
A system and method for analyzing movement of a person includes: measuring kinetic data as the person ambulates with a pair of removable force sensors affixed to a person'"'"'s ankles, feet, shoes or lower-limb prosthesis with each of the pair of force sensors on a different one of the person'"'"'s ankle, feet, shoes or lower-limb prosthesis; obtaining kinematic data as the person ambulates with at least one video camera that video records the person ambulating without markers; and temporally synchronizing the kinetic data and the kinematic data together.
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Citations
19 Claims
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1. A method for analyzing movement of a person, the method comprising:
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a) measuring 3D kinetic data as the person ambulates with a pair of force sensors affixed to a person'"'"'s ankles, feet, shoes or lower limb prostheses with each of the pair of force sensors on a different one of the person'"'"'s ankle, feet, shoes or lower limb prostheses, sensing at least pressure force or vertical force, anterior/posterior shear force, and medio/lateral shear force with at least three-axis sensors, storing the 3D kinetic data to a digital memory device, producing a left or right side identified vector quantity with a mobile processor, and wirelessly transmitting the 3D kinetic data at 60 Hz or greater with a transceiver to a computer with a processor and a transceiver; b) obtaining 3D kinematic data as the person ambulates with at least one video camera that video records the person ambulating without markers on the person and in an environment without force-sensing plates; c) temporally synchronizing the kinetic data from the pair of force sensors and the kinematic data from the at least one video camera together using the processor of the computer by; creating a visual event in the 3D kinematic data captured by the at least one video camera and a force event in the 3D kinetic data sensed by at least one of the pair of force sensors;
orsending a time signal from the computer to the pair of force sensors and the pair of force sensors transmitting a time-stamped vector quantity to the computer; and d) simultaneously outputting the 3D kinetic data and the 3D kinematic data, and saving the 3D kinetic data and the 3D kinematic data together as a data file. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for analyzing movement of a person, the system comprising a pair of 3D force sensors configured to be affixed to a person'"'"'s ankles, feet, shoes or lower-limb prosthesis and configured to measure 3D kinetic data as the person ambulates, each of the pair of 3D force sensors comprising an at least three-axis sensor capable of sensing at least pressure force or vertical force, anterior/posterior shear force, and medio/lateral shear force, a digital memory device capable of storing the 3D kinetic data, a mobile processor capable of producing a left or right side identified vector quantity, a transceiver capable of wirelessly transmitting the 3D kinetic data at 60 Hz or greater a computer with one or more processors and a transceiver;
- at least one video camera configured to record markerless 3D kinematic data as the person ambulates in an environment without force-sensing plates; and
the one or more processors configured to;temporally synchronize the kinetic data from the pair of force sensors and the kinematic data from the at least one video camera together from a visual event created in the 3D kinematic data captured by the at least one video camera and a force event created in the 3D kinetic data sensed by at least one of the pair of force sensors, or from a time signal sent from the computer to the pair of force sensors and a time-stamped vector quantity transmitted from the pair of 3D force sensors to the computer. - View Dependent Claims (13, 14, 15, 16)
- at least one video camera configured to record markerless 3D kinematic data as the person ambulates in an environment without force-sensing plates; and
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17. A mobile gait lab system, the system comprising:
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a) a pair of force sensors configured to be removably affixed to a person'"'"'s ankles, feet, shoes or lower-limb prosthesis and configured to measure kinetic data as the person ambulates, each of the pair of force sensors comprising; an at least 3-axis ground reaction sensor configured to sense at least;
1) pressure force or vertical force,
2) anterior/posterior shear force,
3) medio/lateral shear force, and
4) torque or moment exerted between the person'"'"'s ankles, feet, shoes or lower-limb prosthesis and a support surface about a first vertical axis;b) a plurality of video cameras configured to record markerless kinematic data as the person ambulates in an environment without force-sensing plates, the plurality of video cameras being removably disposed about a predetermined spatial volume; c) a computer with one or more processors configured to; temporally synchronize the kinetic data and the kinematic data together from a visual event created in the kinematic data captured by the plurality of video cameras and a force event created in the kinetic data sensed by at least one of the pair of force sensors, or from a time signal sent from a computer to the pair of force sensors and a time-stamped vector quantity produced by the mobile processor and transmitted from the pair of force sensors to the computer. - View Dependent Claims (18, 19)
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Specification