G - Physics – 01 – V
Patent
G - Physics
01
V
324/48
G01V 3/11 (2006.01) F42C 13/08 (2006.01) G01V 3/10 (2006.01)
Patent
CA 1198165
ABSTRACT The invention relates to metallic object detector comprising a coil system with a transmitter coil for generating an electromagnetic field and a receiver coil which is arranged in such a way that an electromotive force is induced in the coil when the coil is affected by the field generated by a metallic object and the field generated directly by the transmitter coil. The invention relates particularly to the transmitter side and includes a feed-back circuit for keeping the amplitude of the electromagnetic field generated by the transmitter coil constant. The transmitter side comprises, specifically, an oscillator which generates a sinusoidal signal for the transmitter coil and a variable attenuation/amplification circuit which controls the amplitude of the sinusoidal signal. The attenuation/amplification circuit is controlled by a signal which is emitted by the coil system after the sinusoidal signal has been rectified and compared with a reference voltage. In one embodiment it is the signal emitted by the receiver coil due to the directly induced electromotive force in the coil which is fed back but in a second embodiment it is a signal emitted by the transmitter coil which is fed back.
402340
Aktiebolaget Bofors
Fetherstonhaugh & Co.
LandOfFree
Means for metallic object detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Means for metallic object detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Means for metallic object detection will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1262932