FIELD: electricity.
SUBSTANCE: sensor includes two coaxially installed cylinders; external cylinder is made from strong material, for example metal, and internal cylinder with axial hole is made from optically sensitive material. Gap Δ between the above cylinders is filled with self-hardening bonding agent. Gap Δ, modulus of elasticity Eb of self-hardening bonding agent, d/D ratio (diameter d of axial hole of internal cylinder to its outer diameter D), thickness t of wall of external cylinder are determined as per the specified dependences.
EFFECT: improving measurement accuracy of high stress increases in mine rocks of improved strength owing to eliminating distortions of optic picture in photoelastic stress sensor.
6 dwg
