Sensor Characteristics and Information Discrimination Strategy for Advanced Information Input Interface Via Steering Wheel

As an interface between human and automobile, we are developing a system that enables advanced information input to automobiles via a steering wheel using string vibration sensor. However, there is a problem that it is difficult to distinguish force to grip the steering wheel for driving and input actions. In this paper, we focus on differential sensor and investigate a method to determine input information according to its characteristics. Specifically, we set two threshold values each for time axis and voltage axis for sensor output, and implement four input actions. In experiments using a differential sensor and a proportional sensor, the differential sensor showed higher average input success rate than the proportional sensor for the input actions while gripping the steering wheel for driving.