Any simple methods for measuring bike wheel cadence using wires and not bluetooth or ANT+ etc?

[jcannon]

Hi everyone,

I am doing an exercise study and need to measure bicycke cadence... In the event I am unable to tap into the bike electronics and access the raw data signals, would any have any suggestions for how I caouls measure cadence using a bike cadence magnet or other simple device?... My LabvIew system and DAQ is aging and a wireless set-up will not likely work... Any suggestions would be greatly appreciated..

Thanks!

[Conner.A]

You could use an encoder attached to the axle, but the main issue will be supplying power to an NI DAQ device attached to a moving bicycle in a robust manner. What kind of environment will you be testing in?

[Henrik_Volkers]

A simple data aquisition is a sound recorder. ('smart'phone or dedicated device)

lowest frequency is in the 20Hz range

Assuming that the wheel spokes at the wheel rim are sufficiently equal spaced a gitarre pick up (or alike) with that sound recorder will do the job. every spoke will give a pulse

The filling valve will give you an absolute index 😄

KISS

Or use an incremental encoder rigth at the axis for a higher resolution (and frequency)

And than we use LabVIEW to analyse the data 😉 

[Henrik_Volkers]

A build in powerful encoder could be an axle dynamo 😄