Magnetic metal detector mounted in a feed roll of a harvisting m

Details Magnetic metal detector mounted in a feed roll of a harvisting m Magnetic metal detector mounted in a feed roll of a harvisting m

1994-09-16

1996-04-02

Snow, Walter E.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324226, G01R 3312, G08B 2100, A01D 7518, A01D 7528

Patent

active

055044280

ABSTRACT:
A metal detector has three magnet/coil units positioned end-to-end. Each magnet/coil unit has a generally rectangular bobbin supporting a coil and a pair of bar magnets at opposite ends thereof. The three coils are connected electrically in a three-phase "Y" configuration. The voltages generated by all three coils are received by a microprocessor-based signal processing unit (SPU). The SPU generates a three difference signals V(x-y), V(y-z) and V(z-x) which represent the differences between the individual coil voltages. The SPU generates a sum signal representing a sum of the absolute values of all the difference signals and generates a trip signal if the sum signal is greater than a threshold. The SPU determines over which side of the coil assembly the piece of metal passes by comparing to a threshold the difference signal corresponding to a difference between the voltages from the coils at opposite ends of the coil assembly. The SPU more precisely determines the position of the piece of metal by comparing the difference signals to each other.

REFERENCES:
patent: 2550736 (1951-05-01), Tricebock
patent: 3757501 (1973-09-01), Bennett, Jr. et al.
patent: 3889249 (1975-06-01), Bennett, Jr. et al.
patent: 3964042 (1976-06-01), Garrott
patent: 3972156 (1976-08-01), Bennett, Jr. et al.
patent: 4344074 (1982-08-01), Strosser et al.
patent: 4433528 (1984-02-01), Bohman
patent: 4758788 (1988-07-01), Weiss et al.
patent: 4785243 (1988-11-01), Abramczyk et al.
patent: 4788813 (1988-12-01), Strosser et al.
patent: 5187723 (1993-02-01), Mueller-Stuercken
patent: 5343676 (1994-09-01), Weiss

Affiliated with

Also associated with

Rating

Magnetic metal detector mounted in a feed roll of a harvisting m does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magnetic metal detector mounted in a feed roll of a harvisting m, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic metal detector mounted in a feed roll of a harvisting m will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2018956