Patent ID: 7470880
Filing Date: 2008-12-30
Classification: G01J

Abstract:
1. An apparatus for detecting an electromagnetic wave and protecting eyes from glare, the apparatus comprising: an anti-glare eye protection plate for protecting eyes of a worker from light generated by a welding or cutting torch; an optical detector for detecting light generated by the welding or cutting torch; an electromagnetic wave sensor for sensing an electromagnetic wave generated by the welding or cutting torch using at least two coils each having a different shape or different orientation; an electromagnetic wave detector for comparing a signal, which is amplified after being received through the electromagnetic wave sensor, with a preset reference value which can be varied; a user interface including a display for selecting or displaying one of the optical detector and the electromagnetic wave detector; a main controller for applying an electromagnetic wave detector activation signal to the electromagnetic wave detector as the optical detector starts optical detection and monitoring changes in a received electromagnetic wave signal based on an output of the electromagnetic wave detector and then outputting the monitored result; and a light transmittance controller for controlling a change in light transmittance of the anti-glare eye protection plate according to a signal output from the main controller, wherein the electromagnetic wave detector includes: