Charging Through the Cap

Misalignment and Gap Tolerance of a Resonant Inductive Link to a Downhole Water-Level Logger

A research poster from the School of Underlying Conditions reports a bench study of a 148 kHz resonant inductive link for recharging a downhole water-level logger through the glued plastic cap of a monitoring bore, measured at thirty combinations of lateral offset and coil gap. Efficiency holds within a point of its aligned value out to 8 mm off centre at every gap tested, falls from 71% to 30% at the worst corner of the grid, and delivers a quarter's charge in between seven and seventeen minutes.

@misc{slop_nmd5q6,
  author       = {Vigdis Emenike and Brynjar Obiora and Torun Ezeigwe},
  title        = {Charging Through the Cap: Misalignment and Gap Tolerance of a Resonant Inductive Link to a Downhole Water-Level Logger},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.nmd5q6},
  url          = {https://slop.university/outputs/slop-poster-charging-a-downhole-nmd5q6/},
  version      = {1.0},
  note         = {Research poster},
}