Sanyo Electric Co., Ltd.

Sanyo Electric., Ltd.

Ryuji Suzuki

Daizo Takaoka

Masayuki Iida

Kazuhiro Hiratsuka

Hiroaki Arakawa

Yoshiya Yamaue

Shin-ichi Tsurufuji

Yoshimori Fujiwara

A voice recognition method and apparatus in which an electrical signal corresponding to ambient noise is used to set a threshold value in accordance with the level of the ambient noise and a voice signal applied to a microphone is cut-out for processing if it exceeds the threshold value. The processing includes comparison of the voice signal cut-out with stored patterns of voice signals.

Apparatus and method for recognizing voice with reduced sensitivity to ambient noise

A robot for cleaning a floor of a railroad vehicle has a robot body equipped with a cleaning mechanism and includes a travel mechanism controllable for locomotion in a desired direction. The robot also includes a distance detecting arrangement directed at least toward the front and opposite sides of the robot body for measuring the distance to an obstacle or a wall, and a map storing arrangement which has stored therein a cleaning region of the floor previously as a two-dimensional map. The robot also includes a path storing arrangement which has stored therein a predetermined path of travel for cleaning the floor as expressed in coordinates on the map. A first control arrangement is provided for recognizing the coordinates of the position of the robot body on the map based on outputs from the distance detecting arrangement when the robot body is placed at an end portion of the floor. A second control arrangement is also provided for correcting the course of the robot body based on outputs from the distance detecting arrangement while the robot body travels from the coordinate position recognized by the first control arrangement along the predetermined path.

Floor cleaning robot and method of controlling same

Growing community of inventors

Kyoto-fu, Japan

Ryuji Suzuki