WEIGHT MEASURING ELEMENT AND WEIGHING APPARATUS

WIPO Patent Application WO/2010/007767

A1

A weight measuring element (WM) has an optical fiber sensor which comprises optical fibers (20a, 20b) and a sensor unit (SP) that leaks some of the light transmitted at the interface with the optical fibers (20a, 20b), and which emits from the emission end the light which is incident on the incident end and has passed through the sensor unit (SP); a first substrate (1); and a second substrate (2) provided with an opening (2a). The optical fiber sensor is arranged between the first substrate and the second substrate, which are stacked in the vertical direction, so that the sensor unit (SP) is positioned within the region of the opening (2a). When a load is applied from above, a convex bend which projects towards the opening (2a) is produced in the sensor unit (SP) of the optical fiber sensor and in the vicinity thereof, and a loss corresponding to the load is produced in the light transmitted by the optical fiber sensor. Both light and heavy objects can be measured.

KAMATA HITOSHI (JP)
SUZUKI SHIGEYUKI (JP)
WATANABE KAZUHIRO (JP)
NISHIYAMA MICHIKO (JP)
SASAKI HIROYUKI (JP)

PCT/JP2009/003311

January 21, 2010

July 14, 2009

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SOKA UNIVERSITY (JP)
NIHON ELECTRIC WIRE & CABLE CO (JP)
TAMA TLO KABUSHIKI KAISHA (JP)
KAMATA HITOSHI (JP)
SUZUKI SHIGEYUKI (JP)
WATANABE KAZUHIRO (JP)
NISHIYAMA MICHIKO (JP)
SASAKI HIROYUKI (JP)

G01G9/00

WO1997048994A1

1997-12-24

JP2007071613A	2007-03-22
JPH05172615A	1993-07-09
JP2007187578A	2007-07-26
JP2006337318A	2006-12-14

SATO & ASSOCIATES (JP)
Patent business corporation creation international patent firm (JP)

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