Mitsubishi Heavy Industries Limited

Naoki Suganuma

Ryo Suzuki

Yuki Ishii

Masaaki Fujita

Keiji Ida

Kazuhiro Yoshizumi

Shinichiro Takahashi

Masakazu Miyachi

Tetsuya Yamada

Satoshi Tasaki

A position determining method and a work result management device. A position where work is done inside a space surrounded by surfaces is determined, wherein the position where work is done inside the space is a sidewall, wave receivers that receive an acoustic wave signal are placed at three or more points, which are on the same plane substantially parallel to the sidewall but not collinear with one another and whose position coordinates are known. The signal is transmitted from a wave transmitter that transmits an acoustic wave and is placed at the position on the sidewall where work is done, and the respective arrival times of the signal at the three or more wave receivers that are not collinear with one another are measured to determine the position coordinates of the wave transmitter using the arrival times and the position coordinates of the three or more wave receivers.

Method of determining position where work is done in space surrounded by surfaces and work result management device

An oil pan structure includes a plurality of reinforcement beads of several kinds. An engine utilizes the oil pan, whereby the strength and vibration-rigidity (rigidity against vibration) of the oil pan and the engine are sufficiently enhanced so that a natural frequency of the oil pan and the engine therewith becomes adjustable through a selection as to the numbers, locations, and sizes of the beads.

Oil pan structure and an engine therewith

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Nagasaki, Japan

Naoki Suganuma