First Prize

Bicycle ABS Brake System

Richard Wotiz
United States

Abstract | Entry

The innovative Bicycle ABS Brake System controls brake force to reduce wheel skid. Built around an EKK-LM3S9B96 evaluation board containing a Stellaris LM3S9B96 microcontroller and support circuitry, the system measures the force applied to a bike’s brake levers, along with the speed of both wheels. If it detects skidding, it drives a pair of stepper motors that pull back on the brake levers, counteracting the rider’s squeezing force on the levers. An adjustment knob enables the rider to set the skid threshold level at which the system activates, allowing for different performance characteristics depending on the trail surface. You can connect a separate unit containing an LCD and menu buttons for diagnostic monitoring.