Power measurement system
The TMM technology originally was developed for the application on electric bicycles. The sensitivity and accuracy of the TMM sensors is however high enough for power measurement.
IDbike already equipped several bicycles with a TMM sensor to measure power. Also a display has been developed on which the following information can be shown:
- Crank Torque
- Crank speed
- Crank power
- Hearth rate frequency
- Bicycle speed
- Time and Training time
- Average values
- Total distance, energy and calories
- Left/right leg power comparison
- 2 Graphs for Torque/Power/HF/Crank speed
The display has a USB connection to transfer the measured information to a PC. There the signals can be viewed and evaluated. Also a real time display is possible, for instance to evaluate the left/right power distribution and "roundness" of pedalling.
Prototype bicycles that have been equipped with the IDbike power measurement system are:
- Several Mountainbikes
- BMX bicycles for the Dutch Olympic team
- A trial bike to evaluate the torques at trail biking
Power measurement System for BMX
For the Dutch olympic BMX team, IDbike has equipped 2 BMX bicycles with the TMM sensor data aquisition system. With this system, the olympic riders were able to evaluate and improve their start performance. A good start is very important in BMX competition. The rider which which is ahead of the pack after the first 10 meters will almost certainly win the race.
A second bike was equipped with a derailleur shift system, with 2 gears, the first for the maximal acceleration at the start, and another for optimal speed on the track:
This bike also was equipped with a TMM sensor to measure the influence of the derailleur system.
