Oki Electric Industry Co., Ltd.

Tokuo Yamaguchi

Hitoshi Murai

Hideyuki Iwamura

Kengo Koizumi

An optical fiber sensor device includes a control section configured to compute a physical quantity in an optical fiber installed at plural measurement locations based on intensity of scattered light received, and to compute an average of the computed physical quantity for the optical fiber. The control section is configured to compute the average of the physical quantity based on the computed physical quantity and on a length of the optical fiber. A length of the optical fiber installed at the measurement location is increased as a distance between a light source and the respective measurement location increases.

Optical fiber sensor device and optical fiber sensor system

A self-delayed homodyne interferometer includes light source unit, a splitting unit, an interference signal acquisition unit, a scattered light intensity acquisition unit, and a signal processing unit. The light source unit generates probe light. The splitting unit splits into two branches, Brillouin backscattered light occurring in an optical fiber to be measured with the probe light. The acquisition unit receives scattered light of one branch, and uses a self-delayed homodyne interferometer to generate an interference signal. The acquisition unit receives scattered light of the other branch, and acquires intensity of the scattered light. The signal processing unit separates and acquires a frequency shift amount from the intensity of the interference signal, and strain and temperature change from the intensity of the scattered light. The acquisition unit can change a phase of the scattered light of the one of the two branches.

Optical fiber strain and temperature measurement apparatus and optical fiber strain and temperature measurement method

A mobile device and a display apparatus are caused to cooperate. A user is instructed to do a predetermined action and the user holds and moves the mobile device. A motion of the mobile device is detected by the mobile device and the motion of the user is detected by the display apparatus. A pair of the mobile device and the display apparatus that detect the same action at the same time is caused to cooperate.

Device cooperation control system and method based on motion of a mobile device

In an entry assistance apparatus, when the user makes handwritten entry on a medium, a detector detects person condition information on a condition regarding the body of the user. The person condition information may include either or both of positional information on the position of the user and postural information on the posture of the user. Based on the person condition information, a condition estimator estimates one or more conditions of the user. Based on the condition of the user, a presentation information selector selects presentation information on one or more information contents to be presented to the user. The information content indicated by the presentation information will be presented to the user by an information presenter.

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Tokyo, Japan

Tokuo Yamaguchi