Shock Hall Effect Sensor

As suspension testing at SRAM has progressed, it has become more important to measure their performance in the field. Measurements are easier for forks, but become much more difficult with rear shocks. It involves a custom install with special tapped bolts and became a huge pain for the person installing the device and the rider. 

The use of hall effect sensors at SRAM began as a method of measuring brake lever actuation. I was tasked with applying a hall effect sensor to this suspension problem, which allows us to construct a much more universal shock position sensor and take measurements from more bikes, more easily! My final presentation for the project is attached below.

Noise was reduced by using  a larger sensor, but even more dramatically improved with the use of a "flux cone". This cone focuses the magnetic field into a single point going straight towards the sensor.