Exercise device providing symmetry index

• US 9,480,877 B2
• Filed: 03/12/2014
• Issued: 11/01/2016
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Dyaco International Incorporated
• Original Assignee: Dyaco International Incorporated
• Inventors: Chiang, Hao, Murray, Brian
• Primary Examiner(s): GANESAN, SUNDHARA M
• Application Number:
  US14/207,049
• Publication Number:
  US 20150174447A1
• Time in Patent Office: 965 Days
• US Class Current: 1/1
• CPC Class Codes: A63B 2022/0652 for cycling in a recumbent position
• CPC Class Codes: A63B 2071/0652 Visualisation or indication relating to symmetrical exercise, e.g. right-left performance related to spinal column
• CPC Class Codes: A63B 21/008 using hydraulic or pneumatic force-resisters
• CPC Class Codes: A63B 21/015 including rotating or oscillating elements rubbing against fixed elements
• CPC Class Codes: A63B 21/225 with flywheels
• CPC Class Codes: A63B 22/0046 Details of the support elements or their connection to the exercising apparatus, e.g. adjustment of size or orientation attachments of resisters or weights to the body of the user A63B21/4001; using rollers, wheels, castors or gliding means to be moved over the floor or guide tracks A63B22/20
• CPC Class Codes: A63B 22/0605 performing a circular movement, e.g. ergometers
• CPC Class Codes: A63B 2220/24 Angular displacement
• CPC Class Codes: A63B 2220/34 Angular speed
• CPC Class Codes: A63B 2220/833 Sensors arranged on the exercise apparatus or sports implement
• CPC Class Codes: A63B 2220/89 Field sensors, e.g. radar systems
• CPC Class Codes: A63B 2225/09 Adjustable dimensions
• CPC Class Codes: A63B 24/00 Electric or electronic controls for exercising apparatus of preceding groups; Controlling or monitoring of exercises, sportive games, training or athletic performances

Abstract

An exercise device comprises a flywheel, a driving assembly, a magnet, and an analysis module. The driving assembly drives the flywheel to rotate and comprises two pedals. The user drives the flywheel via the pedals. The analysis module employs an angle sensor and a hall sensor to calculate a symmetry index of the user.

Claims

1. An exercise device, comprising:

a flywheel;

a driving assembly for driving the flywheel, the driving assembly comprising a driving wheel, a connecting member, two cranks, and two pedals, wherein the driving wheel indirectly connects to and drives the flywheel via the connecting member, and each crank has two ends in which one end couples to an axle of the driving wheel and the other couples to one of the two pedals;

a first magnet coupling to the driving wheel; and

an analysis module comprising an angle sensor and a hall sensor, wherein the angle sensor is used for measuring the change of angular displacement of the flywheel during a specific period of time and an angular displacement and an angular velocity of the driving wheel are thus obtained, and the hall sensor is used for measuring the location of the first magnet so as to obtain the locations of the two pedals and a rotational speed of the two pedals are obtained by the locations of the two pedals and the angular velocity of the driving wheel, and an output power of left leg and an output power of right leg are obtained by a lookup table with relationship between the rotational speeds of the pedal and resistance level of the exercise device, so as to calculate a symmetry index.

2. The exercise device as set forth in claim 1, wherein the symmetry index is calculated by the following formula:

3. The exercise device as set forth in claim 1, wherein the flywheel couples to a supporter, a second magnet is mounted on an axle of the flywheel, and a surface of the second magnet has an N-pole and an S-pole.

4. The exercise device as set forth in claim 3, wherein the angle sensor couples to the supporter, and the center of the angle sensor aims at the axle of the flywheel.

5. The exercise device as set forth in claim 1, further comprises a frame and a seat, wherein the frame comprises a bracket and a supporting post, the driving wheel couples with the bracket, and the seat couples with the supporting post.

6. A method for measuring a symmetry index of a user operating an exercise device comprising a flywheel, a driving assembly, a first magnet, and an analysis module, the driving wheel driving the flywheel, the driving assembly comprising a driving wheel, a connecting member, two cranks, and two pedals, wherein the driving wheel indirectly connects to and drives the flywheel via the connecting member, and each crank has two ends in which one end couples to an axle of the driving wheel and the other couples to one of the two pedals, and wherein the first magnet couples to the driving wheel, and the analysis module comprises an angle sensor and a hall sensor, the method comprises the steps of:

measuring the change of angular displacement of the flywheel during a specific period of time by the angle sensor, so as to obtain an angular displacement and an angular velocity of the driving wheel;

measuring the location of the first magnet by the hall sensor, so as to obtain the locations of the two pedals and to obtain a rotational speed of the two pedals by the locations of the two pedals and the angular velocity of the driving wheel;

comparing a lookup table with relationship between resistance level and rotational speed of the pedal, so as to obtain an output power of left leg and an output power of right leg; and

calculating a symmetry index by the output power of left leg and the output power of right leg.

7. The method as set forth in claim 6, wherein the symmetry index is calculated by the following formula:

8. The method as set forth in claim 6, wherein the flywheel couples to a supporter, a second magnet is mounted on an axle of the flywheel, and a surface of the second magnet has an N-pole and an S-pole.