Method of and apparatus for measuring instantaneous power
First Claim
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1. A method of measuring instantaneous power exerted on a rotary member thru pedaling a bicycle ergometer, comprising the steps of:
- repeatedly measuring the rotational speed of said rotary member at short time intervals when said rotary member is rotated by pedaling said bicycle ergometer equipped with an inertia mechanism having an inertia with respect to a rotational driving movement;
detecting said rotational speed at each point of start of increase of said rotational speed and at each point of end of increase of said rotational speed, said start and end points alternatingly occurring;
measuring the lapsed times from each said point of start of increase to succeeding said point of end of increase;
finding a finite difference of said lapsed times;
finding the differences of the rotational speeds from said points of start of increase to said points of end of increase during said lapsed times, respectively;
finding, as an average rotational speed, the rotational speed at a mid point between said point of start of increase and said point of end of increase;
finding a regression formula with respect to said average rotational speed of the alternating differences of said lapsed time;
finding a regression formula with respect to said average rotational speed of the alternating differences of said rotational speed;
and obtaining power with respect to said inertia mechanism in accordance with said two regression formulas, said power being obtained as a function of said average rotational speed.
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Abstract
A method and apparatus for measuring instantaneous power resulting from a person pedaling a bicycle ergometer. The rotational speed of a rotary member is periodically detected over a brief period of time at time points corresponding to the start of increase and the end of increase of the rotational speed. From these speeds and time points, the instantaneous power is determined.
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19 Claims
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1. A method of measuring instantaneous power exerted on a rotary member thru pedaling a bicycle ergometer, comprising the steps of:
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repeatedly measuring the rotational speed of said rotary member at short time intervals when said rotary member is rotated by pedaling said bicycle ergometer equipped with an inertia mechanism having an inertia with respect to a rotational driving movement; detecting said rotational speed at each point of start of increase of said rotational speed and at each point of end of increase of said rotational speed, said start and end points alternatingly occurring; measuring the lapsed times from each said point of start of increase to succeeding said point of end of increase; finding a finite difference of said lapsed times; finding the differences of the rotational speeds from said points of start of increase to said points of end of increase during said lapsed times, respectively; finding, as an average rotational speed, the rotational speed at a mid point between said point of start of increase and said point of end of increase; finding a regression formula with respect to said average rotational speed of the alternating differences of said lapsed time; finding a regression formula with respect to said average rotational speed of the alternating differences of said rotational speed; and obtaining power with respect to said inertia mechanism in accordance with said two regression formulas, said power being obtained as a function of said average rotational speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of measuring instantaneous power comprising the steps of:
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repeatedly measuring the rotational speed of a rotary member at short time intervals when said rotary member is rotated by pedaling a bicycle ergometer equipped with an inertia mechanism having an inertia with respect to a rotational driving movement; detecting said rotational speed at each point of start of increase of said rotational speed and at each point of end of increase of said rotational speed, said start and end points alternatingly occurring; measuring a difference of a lapsed time from said point of start of increase to said point of end of increase; finding a difference of the rotational speed from said point of start of increase to said point of end of increase during said lapsed time; finding, as an average rotational speed, the rotational speed at a mid point between said point of start of increase and said point of end of increase; calculating, during each repeated cycle between said point of start of increase and said point of end of increase, power with respect to said inertia mechanism in accordance with the differential of the rotational speed and the average rotational speed corresponding to each repeated cycle.
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14. Apparatus for measuring instantaneous power comprising:
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a bicycle ergometer body equipped with an inertia mechanism having an inertia with respect to a rotational driving movement; means for measuring a rotational speed of a rotary member of said bicycle ergometer at predetermined time intervals; calculating means responsive to the measurement value of the rotational speed for finding a lapsed time between a point of start of increase of the rotational speed and a point of end of increase thereof, and a difference of said lapsed time, and for finding, as an average rotational speed, the rotational speed at a mid point between said point of start of increase and said point of end of increase during said lapsed time, said calculating means determining the power with respect to said inertia mechanism in accordance with the above calculated values; means for indicating said calculated values determined by said calculating means; a timer for indicating the time of the pedaling; and alarm means for giving an alarm when the set time of said timer is over. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification