Development of Tire Torque Sensor

A sensor that is capable of directly measuring tire torque has been developed to improve vehicle control. The sensing element is installed between the brake rotor and wheel, where both the drive torque and breaking torque can be measured. The easy detachment of the sensor from the brake rotor and wheel was achieved using a screw joint. The beams on the sensing element are set in parallel with the wheel’s axis of rotation and the bending strain of the beams is measured and converted to torque. The measured torque data is transmitted wirelessly. A measurement accuracy of ±5% was confirmed on during the actual running of the vehicle, and the appropriate torque change was measured according to the acceleration and braking of the vehicle.