Improving the discrimination of an impulse technique metal detec

Details Improving the discrimination of an impulse technique metal detec Improving the discrimination of an impulse technique metal detec

1990-01-30

1991-09-10

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

324329, 340551, G01R 3300, G01R 3312, G01V 311, G08B 1324

Patent

active

050477188

ABSTRACT:
The invention relates to a method for detecting metal objects, particularly to improving discrimination in a metal detector, where at least two responses are defined for metal objects passing through the metal detector. According to the invention, the correlation of the responses is examined within a determined time period in the metal detector, and at least one parameter is formed of these responses in order to define the group of objects that caused the response.

REFERENCES:
patent: 3686564 (1972-08-01), Mallick, Jr. et al.
patent: 3707672 (1972-12-01), Miller et al.
patent: 4563644 (1986-01-01), Lenander et al.
patent: 4605898 (1986-08-01), Aittoniemi et al.
patent: 4816758 (1989-03-01), Theissen et al.
patent: 4894619 (1990-01-01), Leinonen et al.

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