Method and apparatus for stud sensing to determine erroneous calibration over a stud

摘要

A method for determining location of a stud positioned behind a surface comprising the steps of: providing a stud sensing device sensing additional capacitive loading caused by the stud when the device moves along the surface approaching the stud; calibrating the device; determining by sensing a decrease of the capacitive loading if said calibration has occurred over a stud; and indicating by said device when said calibration has occurred over a stud. <IMAGE>