Metal detector with bivariate display

Details Metal detector with bivariate display Metal detector with bivariate display

1992-07-24

1996-06-04

Snow, Walter E.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

324233, 345140, G01N 2772, G01V 311, G01V 3165, G01R 2726

Patent

active

055236901

ABSTRACT:
A metal detector having a receive signal responsive to detected metal objects and having a display panel that can simultaneously display a plurality of phase angles associated with the receive signal. Additionally, the display panel can simultaneously display a second variable associated with the receive signal at each particular phase angle. The second variable is user selectable and can be either (1) a count of the number of times the signal amplitude exceeds a predetermined threshold level at a particular phase angle or (2) the signal amplitude when the signal is at a particular phase angle.

REFERENCES:
patent: 3648270 (1972-03-01), Metz et al.
patent: 3848182 (1974-11-01), Gerner et al.
patent: 4507612 (1985-03-01), Payne
patent: 4631533 (1986-12-01), Mark, Jr.
patent: 4742339 (1988-05-01), Bazuik
patent: 4853617 (1989-08-01), Douglas et al.
patent: 4868910 (1989-09-01), Maulding
patent: 5148151 (1992-09-01), Podhrasky

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