Distributed position detection rope and distributed position detection system

A distributed position detection rope comprising:

• basic optical elements each including an optical fiber for measuring a physical quantity, a plurality of tensile strength bodies located on opposite sides of the optical fiber so as to have intervals from the optical fiber, and a sheath material surrounding the optical fiber and the tensile strength bodies so as to integrate the optical fiber and the tensile strength bodies, the sheath material having an outer surface with recess/projection shaped portions provided at constant intervals along an axial direction of the sheath material;
• a center axis body;
• a cylindrical inner sheath layer including a first optical element having the basic optical elements which are wound at a predetermined pitch along an axial direction of the center axis body and which, in a cross-section perpendicular to an axis of the center axis body, are arranged at predetermined intervals on a first circle, the inner sheath layer being provided on an outer side of the center axis body coaxially with the center axis body;
• and
• a cylindrical outer sheath layer including a second optical element having the basic optical elements which are wound along the axial direction of the center axis body and which, in the cross-section perpendicular to the axis of the center axis body, are arranged at predetermined intervals on a second circle different from the first circle and have a placement angle different from that of the basic optical elements of the first optical element, the outer sheath layer being provided on an outer side of the inner sheath layer coaxially with the center axis body.