POWER CABLE WITH PARALLEL SPIRAL TRANSMISSION LINE STRUCTURE FOR DISTRIBUTED SENSING AND MEASURING OF ROCK-SOIL MASS DEFORMATION

摘要

This invention discloses a parallel spiral transmission line structure sensing cable for rock and soil deformation distributed measurement. A circular cross-section silicone rubber is tightly wounded by two insulated wires. The two insulated wires make the spiral cable. Out of the spiral cable is the silicone rubber pipe). They constitute a sensing cable. A termination matching impedance ZL is connected to one end of the two wires. TDR measurement instrument is connected to the other end of the two wires. This invention implements a distributed positioning and measuring rock and sail deformation. It solves the dilemma of "measuring at unchanged and the changed is not measured" in the landslides, ground subsidence and other geotechnical deformation monitoring. It provides good tool for distributed deformation measurement.