NON-CONTACT CURRENT DETECTION DEVICE

摘要

Apparatus (10) and method for determining electromagnetic field strength about a field source (30), comprises: vibrating a coil (12) with a predetermined amplitude and a predetermined frequency at a location about the field source (30), measuring emf induced in the coil (12), and deducing a field strength from the induced emf. The field source (30) may typically be a current bearing wire (30), and the method provides a way of non-contact measurement of the current (I) in the wire (30) as well as a way of locating the wire (30) if concealed. An alternative mode involves using the coil (12, 34) as a scanning device for obtaining distribution information of a magnetic field.