Analysis with syn.bike

syn.bike have a very nice website that can be used to visualize BODAQS data. If you don’t have an appetite for Jupyter Lab notebooks, this is a great way to view your logs.

Change your logger settings

On the logger menu, navigate to log format and select syn.bike raw (this can also be done via the logger’s web UI).

Now go log some data!

Configuring data.syn.bike

data.syn.bike uses a small local executable to process log files. Download it from the ‘settings’ tab and place it in a suitable directory.

Double-click the executable to run it - a terminal window should open and the website will give you a message to show that the processing server is connected. As you use data.syn.bike this terminal window will report what it is doing (if you’re interested).

Whenever you use data.syn.bike you will need to have it running

Next, go to the ‘settings’ tab and ensure the following settings are correct:

• Front and rear sensor travels: These should be the full-range travel figures for your sensors, not your bike’s suspension travel.
• Log frequency: This should match the sample rate at which you collected your data.
• Analog resolution: leave this at 12 bits.
• Wheel diameter and number of speed sensor magnets: Not used. You can ignore these.
• Invert analog data: ordinarily leave set to ‘off’. If you have wired your sensors so their output is inverted, switch it.
• Position lowpass filter and zero crossing noise threshold: Leave these at their default values.
• Processing server location: set to http://127.0.0.1:5079

Upload and examine your files

Go to the ‘analysis’ tab. If you are measuring shock travel rather than rear wheel travel (as you almost certainly are), then you will need to supply leverage information.

If you have a leverage curve for your bike, then select ‘curve data’ and upload the curve in a CSV file. An example of the format is [here]. Otherwise select ‘single value’, divide your bike’s rear wheel travel by its shock travel and enter the result in the box labelled ‘average leverage’.

Click in the ‘file’ box. Select the file you want to view.

The ‘basic’ and ‘histogram’ plots let you examine time-series and frequency distribution data on wheel travel and velocity.