Treadmill belt wear notification system

1. A treadmill comprising:

a belt upon which a runner exercises;

a motor operably coupled to the belt to drive the belt;

an electric current sensor to output signals indicating an electric current draw of the treadmill; and

a controller to:

receive samples of electric current draw of the treadmill at different speeds of a treadmill belt of the treadmill;

differently weigh a value of each sample based on a speed of the treadmill belt at which the value of each sample was obtained; and

output a belt wear notification based on the different weighted values of the samples.

2. The treadmill of claim 1 , wherein the differently weighting of the values of the samples comprises partitioning speeds of the treadmill belt into ranges of speeds and assigning a different weighting factor to each of the ranges of speeds.

3. The treadmill of claim 2 , wherein the different weighting factors assigned to each of the ranges of speeds is based upon a resolution of each of the ranges of speeds, each resolution being based upon a difference between electric current draw of the treadmill when driving a new treadmill belt as compared to when driving a completely worn treadmill belt in need of replacement.

4. The treadmill of claim 2 , wherein the different weighting factors assigned to each of the ranges speeds is further based upon an occurrence frequency of each of the ranges of speeds, each occurrence frequency being based upon a number of the samples in each of the ranges of speeds.

5. The treadmill of claim 1 , wherein values for samples of electric current draw received while the treadmill belt is at a speed of less than 5 mph are weighted by a first weighting factor and wherein values for samples of electric current draw received while the treadmill belt is at a speed of greater than 7 mph are weighted by second weighting factor greater than the first weighting factor.

6. The treadmill of claim 1 , wherein the controller is to further:

group values for samples of electric current draw during a predefined time interval of at least two seconds into groups;

derive a statistical value for each group from the values for the electric current draw in each group, wherein the belt wear notification is based upon the statistical value for each of the groups.

7. The treadmill of claim 1 further comprising:

partitioning speeds of the treadmill belt into ranges of speeds;

storing values of the samples within each range of speed from a plurality of different workouts; and

deriving a statistical value for the values for the electric current draw in each range of speed from the plurality of different work outs, wherein the belt wear notification is based upon the statistical value for each of ranges of speed.

8. The treadmill of claim 1 , wherein the values of the samples of electric current draw are differently weighted based upon an incline setting of the treadmill belt at which the value of each sample was obtained.

9. The treadmill of claim 1 , wherein the belt wear notification is not based upon samples of electric current draw taken at an incline setting of the treadmill belt other than zero.

10. The treadmill of claim 1 , wherein the controller is further to determine the presence of a runner on the treadmill belt, wherein the belt wear notification is not based upon samples electric current draw taken in absence of a runner on the treadmill belt.

11. The treadmill of claim 1 , wherein the controller is further to:

partition speeds of the treadmill belt into ranges of speeds;

store values of the samples within each range of speed from a plurality of different workouts; and

derive a statistical value for the values for the electric current draw and range of speed from the plurality of different work out, wherein the belt wear notification is based upon the statistical value for each of ranges of speed.

12. The treadmill of claim 1 , wherein the controller is to output the belt wear notification based upon different weighted values of the samples from a plurality of workouts on the treadmill and is to differently weight the values for the samples based upon an age of the samples.

13. The treadmill of claim 1 , wherein the controller is to output the belt wear notification based upon different weighted values of the samples from a predefined number of workouts, wherein the workouts upon which output of the belt wear notification is based being selected on a first in first out basis.

14. The treadmill of claim 1 , wherein the output is additionally based upon service conditions other than belt wear.

15. A treadmill comprising:

a belt upon which a runner exercises;

an electric current sensor to output signals indicating an electric current draw of the treadmill; and

a controller to:

receive and store first samples of electric current draw from a first workout on the treadmill;

receive and store second samples of electric current draw of the treadmill from a second workout on the treadmill; and

output a belt wear notification based on the first stored samples and the second stored samples.

16. The treadmill of claim 15 , wherein the controller is to output the belt wear notification based upon different weighting factors applied to the first samples and the second samples, the different weighting factors being applied based upon different ages of the first samples and the second samples.

17. The treadmill of claim 15 , wherein the controller is to output the belt wear notification based upon samples from a predefined number of workouts on the treadmill, including the first samples and the second samples, wherein the workouts forming the predefined number workouts and upon which output of the belt wear notification is based are selected on a first in first out basis.

18. The treadmill of claim 15 , wherein the controller is to:

partition speeds of the treadmill belt into ranges of speeds comprising a first range and a second range,

assign a different weighting factor to each of the ranges of speeds; and

differently weight the first sample and the second sample based upon the first sample having a first value within the first range and the second sample having a second value within the second range, wherein the belt wear notification is output based upon the weighted first sample and the weighted second sample.

19. The treadmill of claim 18 , wherein samples having values of electric current draw received while the treadmill belt is at a speed of less than 5 mph are weighted by a first weighting factor and wherein values for samples of electric current draw received while the treadmill belt is at a speed of greater than 7 mph are weighted by second weighting factor greater than the first weighting factor.

20. A treadmill comprising:

a belt upon which a runner exercises;

an electric current sensor to output signals indicating an electric current draw of the treadmill; and

a controller to:

maintain a workout array, the workout array comprising an array of a predefined number workouts, each of the workouts comprising a weighted average of amperage values received from the electric current sensor for each of a plurality of speed ranges, wherein for each new workout added to the workout array, an oldest workout is removed; and

output a belt wear notification based on an aggregation of the weighted average of amperage values for the plurality of speed ranges of the workout array.

21. The treadmill of claim 20 , wherein values for samples of electric current draw received while the treadmill belt is at a speed of less than 5 mph are weighted by a first weighting factor and wherein values for samples of electric current draw received while the treadmill belt is at a speed of greater than 7 mph are weighted by second weighting factor greater than the first weighting factor.