Method for determining a measurable target variable and corresponding system
First Claim
1. A method for improving the accuracy of a measured physical performance target variable of a user in performing a sporting activity, the method comprising:
- measuring a first physical performance variable of the user with the aid of a first sensor positioned within one of a wristop computer, a shoe mounted sensor and a body mounted sensor;
measuring a second physical performance variable of the user with the aid of a second sensor;
calculating a value of the physical performance target variable with the aid of the measurements of the first and second physical performance variables;
determining an estimate for the physical performance target variable with the aid of the measurement of at least the first physical performance variable;
determining at least a first error estimate, which depicts the error in the measurement of the first physical performance variable;
adapting a filter to a filtering strength that corresponds to the magnitude of said at least first error estimate;
filtering the estimate of the physical performance target variable using both the first error estimate and the measurement result of the second physical performance variable; and
displaying a value with an improved accuracy of the physical performance target variable to the user,wherein the target variable is speed or altitude.
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Accused Products
Abstract
The invention relates to a method and a system for determining a target variable to be measured in a mobile device. A first physical variable is measured with the aid of a first sensor and a second physical variable with the aid of a second sensor. The second physical variable is different to the first physical variable, or is measured using a different technique. The value of the target variable is calculated with the aid of the measurement of the first and second physical variables. An estimate for the target variable is determined with the aid of at least the measurement of the first physical variable. At least a first error estimate is determined, which depicts the accuracy of the measurement of the first physical variable. The estimate of the target variable is filtered using both the first error estimate and the measurement of the second physical variable.
27 Citations
29 Claims
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1. A method for improving the accuracy of a measured physical performance target variable of a user in performing a sporting activity, the method comprising:
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measuring a first physical performance variable of the user with the aid of a first sensor positioned within one of a wristop computer, a shoe mounted sensor and a body mounted sensor; measuring a second physical performance variable of the user with the aid of a second sensor; calculating a value of the physical performance target variable with the aid of the measurements of the first and second physical performance variables; determining an estimate for the physical performance target variable with the aid of the measurement of at least the first physical performance variable; determining at least a first error estimate, which depicts the error in the measurement of the first physical performance variable; adapting a filter to a filtering strength that corresponds to the magnitude of said at least first error estimate; filtering the estimate of the physical performance target variable using both the first error estimate and the measurement result of the second physical performance variable; and displaying a value with an improved accuracy of the physical performance target variable to the user, wherein the target variable is speed or altitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 25)
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20. A system for improving the accuracy of a measured user'"'"'s physical performance target variable, the system comprising:
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a wristop computer including at least first and second sensors for measuring a first and second physical performance variables, respectively; a first mechanism configured to; calculate a value of said physical performance target variable by measurements of said first and second physical performance variables, determine an estimate for the physical performance target variable with the aid of the measurement of at least the first physical performance variable, to determine at least a first error estimate, and adapting a filter to have a filtering strength that corresponds to the magnitude of said at least first error estimate and the measurement result of the second physical performance variable, a second mechanism configured to filter the estimate of the physical performance target variable using both the first error estimate and the measurement of the second physical performance variable, and a display for displaying a value with an improved accuracy of the physical performance target variable to the user, wherein the target variable is speed or altitude. - View Dependent Claims (21, 22, 23, 24, 26, 27, 28, 29)
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Specification