Shimizu Construction Co., Ltd.

Hiroaki Yanagida

Sogo Keibi Hosho Kabushiki Kaisha

Norio Muto

Masaru Miyayama

Minoru Sugita

Teruyuki Nakatsuji

Yasushi Otsuka

Teijiro Kajiwara

A strain or stress gauge 1A is presented for measuring the stress of a structure or a member. The gauge 1A comprises a bundle of electric conductive fibers 3, and a pair of terminals 4, for measuring an electric resistance of the bundle of electric conductive fibers provided on both ends thereof. It presents a strain or stress gauge having a simple structure, which can be produced inexpensively, and its size can be chosen freely. It is possible to know not only the state of a strain or stress but also the history of stress in a structure or a structural member which, by the characteristics of a specific curve relating the stress/strain relationship of the gauge.

Strain or stress gauge and method for detecting strain or stress of

In the present invention, semiconductor fibers electrical resistance of which varies in response to temperature change are arranged unidirectionally or bidirectionally, so that a detection element which has excellent response characteristic, can detect also a position of infrared source, and is inexpensive can be obtained.

Infrared detection element

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Kanagawa, Japan

Norio Muto