J1602-1-6 触覚センシングにおける確率共鳴に関する研究(機械の知能化:異分野からのアプローチ(1))

抄録

In information processing of a biological organism, there is stochastic resonance (SR) capable of enhancing sensitivity by making a proper noise superimpose upon not detectable weak signal to detect the signal. Meanwhile, since in tactile sensing a noise gets mixed inevitably by contact with an object and sensor's movement on it, it is expected that sensing accuracy can be increased by mimicking the biological information processing. In the present research, we perform a series of psychophysical experiments to accumulate basic remarks on SR of human tactile sensation. For the experiment, we developed an experimental apparatus composed of a PZT actuator and a PZT controller to generate a step of several microns height mixed with a noise. The psychophysical experiment is conducted according to PEST (Parameter Estimation by Sequential Testing) method. Trial experiments show that a subtle step with a noise is easily perceived compared to a pure step without a noise, and that the PEST program is well working because we obtain a threshold of about 1 micron..