STEEL PIPE INSERTION WORK STEEL PIPE STRAIN DETECTION STRUCTURE

WIPO Patent Application WO/2014/054642

A1

A hollow sensor rod (5), which is alternately formed of narrow diameter parts (7), and large diameter parts (8) which form a tiny gap with respect to the inner face of a cylindrical iron pipe (1), is inserted into the cylindrical iron pipe (1), and both ends thereof are anchored in the cylindrical iron pipe (1). Strain gauges (13) are adhered to the outer circumference faces of the narrow diameter parts (7) of the sensor rod, the lead lines whereof being inserted in the sensor rod (5) from lead line insertion holes (7a) which are opened in the narrow diameter parts (7) said lead lines being extruded from the top part of the cylindrical iron pipe (1). If the cylindrical iron pipe (1) bends and deforms due to earth movement, the sensor rod (5) bends and deforms in line with the bending and deformation of the cylindrical iron pipe (1) by the effect of the large diameter parts (8) which form the tiny gap with respect to the inner face of the cylindrical iron pipe (1). In such a circumstance, strain arises in the outer circumference faces of the narrow diameter parts (7) which is greater than the outer circumference faces of the large diameter faces (8), and it is possible to sense bending and deformation of the cylindrical iron pipes (1) with high sensitivity by the strain gauges (13) which are adhered to the outer circumferences of the narrow diameter parts (7).

IWASA NAOTO (JP)
HIGUCHI KEI (JP)

PCT/JP2013/076711

April 10, 2014

October 01, 2013

Click for automatic bibliography generation  

NIPPON STEEL & SUMIKIN METAL PRODUCTS CO LTD (JP)

G01D21/00; E02D17/20; G01B21/32

JP2012108008A	2012-06-07
JP2002148081A	2002-05-22
JPS58173405A	1983-10-12
JPH0429806U	1992-03-10

HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)

View/Download PDF      PDF Help

Previous Patent: VEHICLE-INTERIOR ILLUMINATION DEVICE

Next Patent: PHOTOCATALYST INJECTION METHOD AND PHOTOCATALYST INJECTION SYSTEM