Rohm Co., Ltd.

The University of Tokyo

Atsushi Momota

Tadashi Kobayashi

Hideki Nishiyama

Masafumi Seike

Senshi Fukashiro

Tengai Kubo

This position detection system comprises a mobile station that transmits a beacon signal, a plurality of fixed stations that receive the beacon signal, and a position analysis device that acquires position information for the mobile station by estimating the position of the mobile station from the reception intensities of the beacon signal at each fixed station. The mobile station includes a movement detection unit (acceleration sensor, geomagnetic sensor, etc.) that determines when movement has stopped. While the movement of the mobile station has stopped, the position analysis device stops estimating the position of the mobile station and keeps the position information at a fixed position.

Position detection system

A subject performs a sit-to-stand operation while wearing a device (SU) that contains an acceleration sensor () on the front of the chest. The present invention derives a muscular strength index representing the muscular strength of a human body by obtaining maximum acceleration value data from a signal expressing the size of an acceleration vector comprising a tri-axial component in detected acceleration, and using the maximum acceleration value data and the muscle mass or body fat mass of the subject. The present invention has the ability to derive a physical activity amount from the acceleration detection results, and on the basis of the activity amount (ACT) during a prescribed activity target period and the muscular strength index at the start and end times of the activity target period, obtains an activity efficiency index that corresponds to changes in the muscular strength index in response to the amount of activity.

Index deriving device, wearable device, and mobile device

An abnormality detection apparatus () is configured to detect an abnormality of a lighting device (). The abnormality detection apparatus () includes an illuminance sensor (), a memory () and a controller (). The controller () is configured to detect the abnormality of the lighting device () based on a criterion stored in the memory () and a difference between an illuminance detected by the illuminance sensor () during on state of the lighting device () and an illuminance detected by the illuminance sensor () during off state of the lighting device ().

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Kyoto, Japan

Atsushi Momota