4232 高騒音環境下における安全・快適作業実現のための仮想低雑音空間の構築(S68 農業ロボット,S68 農業ロボット)

概要

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Many types of mechanized facilities have been constructed at many places in the world. Although automated systems have been introduced in the facilities to substitute human operators, there are many facilities where operators are forced to work under high noise and unsafe conditions from the mechanical systems. In this research, a speech and noise-sensing and reduction system was constructed and a virtual space was created with noise canceling headphones, microphones, a TV camera, and a host computer. The headphones reduced noise by providing inverse phase of the noise. Operators' speech signals including noise signals were collected by microphones at their mouths and were sent to the host computer from operators' small PCs through wireless LAN. The operators' positions on floor were measured by a TV camera installed on the ceiling of facility. The speech signals were sent back to individual operators' headphones after the speech levels were amplified based on the operators' positions, while the noise from the microphones was reduced by a method of spectral signal subtraction. An operator could hear the other operator's speeches in the virtual low-noise space according to their distances.
社団法人日本機械学会の論文
2007-09-07