Hitachi Cable, Inc.

The Tokyo Electric Power Company, Incorporated

Satoshi Yamamoto

Tomiya Abe

Masafumi Kaga

Yasuyuki Hishida

Akihiro Tanba

Toshio Fukahori

Hiroyuki Kunugiyama

Nobuo Ando

Kouichi Sugiyama

Teruaki Tsutsui

Hiroshi Kawakami

Keiichi Hashiba

Shigehiro Endoh

Akira Tokushima

Yasuo Ozawa

Kaoru Yamazaki

An insert molding method includes holding a plurality of insert members in a molding die to be separated from one another, and subsequently filling a resin into the molding die to fill a gap between the insert members and a periphery thereof with the resin to form an insert molded product such that the insert members are separated at a preset interval from one another. The molding die includes a space-maintaining projection for maintaining a separation interval between the insert members at the preset interval or more, the projection being formed on an inner wall surface of the molding die opposite to a longitudinal end of the insert members, and a gate for filling the resin therethrough into the molding die, the gate being formed on an inner wall surface of the molding die opposite to a side of the insert members in a width direction thereof.

Insert molding method and insert molded product

A cable-type load sensor having an advantage in layout and being capable of sensing the load precisely is provided. The cable-type load sensor comprises a linear member composed of electrically conductive rubber and having a hollow part extending in the longitudinal direction at the central part of the cross section, and a cladding layer composed of the same kind of rubber material as the linear member and covering the circumference on the linear member.

Cable-type load sensor

A fiber optic distributed temperature sensor system outputs a temperature distribution along the longitudinal direction of a sensor optical fiber by measuring the temperature dependency of Raman scattered light intensity produced in an optical fiber by use of the OTDR technique. The system is characterized in that a light output from a light source is input to the sensor (optical fiber) via an optical wavelength division demultiplexer, that among the reflected light of back scattered light returning from the sensor optical fiber, light of a particular wavelength range is reflected or transmitted by at least one optical filter of the optical wavelength division demultiplexer to separate the light of the particular wavelength range and that signal of the light of the particular wavelength range is guided to a detector of an optical measuring system.

Fiber optic distributed temperature sensor system

Growing community of inventors

Hitachi, Japan

Satoshi Yamamoto