Stride measuring apparatus
First Claim
1. A stride measuring apparatus comprising:
- a belt having a running surface for a subject to run or walk, the belt being driven in a predetermined direction;
light beam emitting means placed at a position along an edge part of the running surface for emitting a light beam in a direction intersecting with the predetermined direction and so that the light beam maintains a predetermined height above the running surface;
light beam detecting means placed at an edge part of the running surface and for receiving the light beam emitted by the light beam emitting means and to output a first signal when the light beam detecting means does not receive the light beam emitted from the light beam emitting means, and a second signal when the light beam detecting means detects the light beam emitted from the light beam emitting means;
moving speed calculating means for calculating a moving time based on a calculation of a difference between a rise time and a fall time of one first signal out of two first signals outputted in succession from the light beam detecting means, and for calculating a moving speed of the subject on the basis of a calculation of a quotient between a size of the foot of the subject and the moving time;
stride time calculating means for calculating a stride time based on a calculation of a difference between output times of said two first signals;
stride calculating means for calculating a stride of the subject, based on a calculation of a product between the stride time calculated by the stride time calculating means and the moving speed calculated by the moving speed calculating means;
second light beam emitting means placed at a position along an edge part of the running surface for emitting a second light beam in a direction intersecting with the predetermined direction and so that the second light beam maintains a predetermined height above the running surface and is inclined at a predetermined angle relative to the emission direction of the light beam;
second light beam detecting means placed at a position along an edge part of the running surface for receiving the second light beam emitted by the second light beam emitting means and to output a first signal when the second light beam detecting means does not receive the second light beam emitted from the second light beam emitting means, and a second signal when the second light beam detecting means receives the second light beam emitted by the second light beam emitting means; and
left/right determining means for determining whether the stride calculated by the stride calculating means is a stride of the left foot or a stride of the right foot of the subject, based on a comparison of a time difference between first signals respectively outputted from the light beam detecting means and from the second light beam detecting means, with a time difference between first signals respectively outputted in succession from the light beam detecting means and from the second light beam detecting means.
1 Assignment
0 Petitions
Accused Products
Abstract
In a stride measuring apparatus, a signal wave emitter and a signal wave detector are opposed to each other in a direction intersecting with a predetermined direction in which the running surface is driven. The signal wave emitter emits a light beam. The signal wave detector outputs an ON signal when receiving the light beam, and outputs an OFF signal when the light beam is intercepted. A detector part calculates a moving speed on the basis of a difference between a fall time and a rise time of one OFF signal out of two OFF signals outputted in succession from the signal wave detector, and a foot size of a subject. The detector part calculates a difference between output times of the two OFF signals (stride time) and calculates a stride on the basis of a product of the moving speed and the stride time.
43 Citations
14 Claims
-
1. A stride measuring apparatus comprising:
-
a belt having a running surface for a subject to run or walk, the belt being driven in a predetermined direction; light beam emitting means placed at a position along an edge part of the running surface for emitting a light beam in a direction intersecting with the predetermined direction and so that the light beam maintains a predetermined height above the running surface; light beam detecting means placed at an edge part of the running surface and for receiving the light beam emitted by the light beam emitting means and to output a first signal when the light beam detecting means does not receive the light beam emitted from the light beam emitting means, and a second signal when the light beam detecting means detects the light beam emitted from the light beam emitting means; moving speed calculating means for calculating a moving time based on a calculation of a difference between a rise time and a fall time of one first signal out of two first signals outputted in succession from the light beam detecting means, and for calculating a moving speed of the subject on the basis of a calculation of a quotient between a size of the foot of the subject and the moving time; stride time calculating means for calculating a stride time based on a calculation of a difference between output times of said two first signals; stride calculating means for calculating a stride of the subject, based on a calculation of a product between the stride time calculated by the stride time calculating means and the moving speed calculated by the moving speed calculating means; second light beam emitting means placed at a position along an edge part of the running surface for emitting a second light beam in a direction intersecting with the predetermined direction and so that the second light beam maintains a predetermined height above the running surface and is inclined at a predetermined angle relative to the emission direction of the light beam; second light beam detecting means placed at a position along an edge part of the running surface for receiving the second light beam emitted by the second light beam emitting means and to output a first signal when the second light beam detecting means does not receive the second light beam emitted from the second light beam emitting means, and a second signal when the second light beam detecting means receives the second light beam emitted by the second light beam emitting means; and left/right determining means for determining whether the stride calculated by the stride calculating means is a stride of the left foot or a stride of the right foot of the subject, based on a comparison of a time difference between first signals respectively outputted from the light beam detecting means and from the second light beam detecting means, with a time difference between first signals respectively outputted in succession from the light beam detecting means and from the second light beam detecting means. - View Dependent Claims (2, 3, 4)
-
-
5. A stride measuring apparatus comprising:
-
a belt having a running surface for a subject to run or walk, the belt being driven in a predetermined direction; first light beam emitting means placed at a position along an edge part of the running surface for emitting a first light beam in a direction intersecting with the predetermined direction and so that the first light beam maintains a predetermined height above the running surface; second light beam emitting means placed a predetermined distance apart from the first light beam emitting means in the predetermined direction and configured to emit a second light beam in a direction intersecting with the predetermined direction and and so that the second light beam maintains a predetermined height above the running surface; first light beam detecting means placed at an edge part of the running surface and configured to receive the first light beam emitted by the first light beam emitting means and to output a first signal when the first light beam detecting means does not receive the first light beam emitted from the first light beam emitting means, and a second signal when the first light beam detecting means receives the first light beam emitted from the first light beam emitting means; second light beam detecting means placed at an edge part of the running surface for receiving the second light beam emitted by the second light beam emitting means and to output a first signal when the second light beam detecting means does not receive the first light beam emitted from the second light beam emitting means, and a second signal when the second light beam detecting means receives the second light beam emitted from the first light beam emitting means; moving speed calculating means for calculating a moving time based on a calculation of a difference between an output time of a first signal outputted from the first light beam detecting means and an output time of a first signal outputted subsequently thereto from the second light beam detecting means, and for calculating a moving speed of the subject on the basis of a calculation of a quotient between the predetermined distance and the moving time; stride time calculating means for calculating a stride time based on a calculation of a difference between output times of two first signals outputted in succession from one of the first and second light beam detecting means; and stride calculating means for calculating a stride of the subject, based on a calculation of a product between the stride time calculated by the stride time calculating means and the moving speed calculated by the moving speed calculating means. - View Dependent Claims (6, 7, 8, 9, 10)
-
-
11. A stride measuring apparatus comprising:
-
a belt having a running surface for a subject to run or walk, the belt being driven in a predetermined direction; a plurality of light beam emitting means placed at positions along an edge part of the running surface and at predetermined intervals, each for emitting a light beam in a direction intersecting with the predetermined direction and at a predetermined height above the running surface; a plurality of light beam detecting means placed at positions along an edge part of the running surface, each for receiving a light beam emitted by a corresponding light beam emitting means, to output a first signal when the light beam detecting means do not receive the light beam emitted from the corresponding light beam emitting means, and to output a second signal when the light beam detecting means receive the light beam emitted from the corresponding light beam emitting means; line detecting means for detecting a line that fits a variable set containing variables with parameters of an output time of the first signal or the second signal outputted from the light beam detecting means, and the position of the light beam detecting means, the variable set being obtained with movement of a foot of the subject in the predetermined direction; and stride calculating means for calculating a stride, based on a distance between intersecting points of a line passing an arbitrary time, with two lines detected in succession by the line detecting means. - View Dependent Claims (12, 13, 14)
-
Specification