Measurement Techniques with Frequency-Modulated Probe Light for Proximity and Tactile Combo Sensor

Abstract

We have developed a single sensor which can detect proximity and multi-axial touch force for smart- manipulation control of delicate objects. In this work, a measurement technique with modulated probe light to reduce of the environmental noise for proximity sensing has been reported. The white LED as probe light was switched at 150 Hz. Although the sensor output includes environmental noise from power source and room light, it is demonstrated that the proximity distance can be distinguished as amplitude of frequency component at 150 Hz.