Chuo University

Nissan Motor Company Limited

Murata Machinery, Ltd.

Takeshi Toi

Kazuki Yokoyama

Wataru Nakai

Hiroyuki Kubotani

Yasuyuki Asahara

Takashi Senda

Yasuhiko Fukami

Masayuki Satomi

A press machine includes a machine body that is able to press a workpiece and a notifier that notifies an operator of the operation of the machine body or the state of the workpiece in advance using at least one of a sound and light selected in accordance with the operation of the machine body.

Press machine

A wakefulness-maintaining device capable of maintaining a driver's wakefulness by making the driver aware of changes in sound characteristics. A wakefulness-maintaining device (), which maintains a person's wakefulness, wherein: a switching time control part () analyzes the characteristics of perceived sounds acquired by a microphone provided inside the vehicle, the perceived sounds comprising control sounds played back by the wakefulness-maintaining device () and environmental sounds around the person when no control sounds are being played back; an in-car sound-accumulating part () accumulates the perceived sounds; an acoustic pressure change-setting part () sets the control method to be used on the environmental sounds on the basis of the characteristics of the perceived sounds accumulated by the in-car sound-accumulating part (); and a control sound-generating part () applies the control method, set by the acoustic pressure change-setting part (), on the environmental sounds and generates control sounds.

Wakefulness-maintaining device and wakefulness-maintaining method

A vehicle () includes an electric drive motor (), an inverter () that provides a drive current to the electric motor () and a controller () that controls the inverter (). The controller () functions as a beat noise generation system that creates beat noise by generating a second operating noise containing a component an order of which is very close to a value representing an order of an operating noise generated in proportion to a rotation speed of the electric motor () so as to create desirable traveling noise corresponding to an accelerating state while the vehicle accelerates.

Operating noise control device and operating noise control method for vehicle

Growing community of inventors

Tokyo, Japan

Takeshi Toi