Surface testing device with reciprocating sensor

Details Surface testing device with reciprocating sensor Surface testing device with reciprocating sensor

1989-11-16

1991-09-24

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetic test structure elements

73633, 324226, 324227, 324242, 356380, G01N 2782, G01N 2904, G01N 2188, G01R 3312

Patent

active

050516965

ABSTRACT:
A surface testing device comprising a vibratory system for the reciprocating movement of a sensor carrier (3) arranged above the surface to be tested and comprising an exciter arrangement for operating the system at or in the vicinity of its resonance frequency wherein the vibratory system contains spring elements in the form of pneumatic springs (5, 6) acting on the sensor carrier (3) in opposite directions, which pneumatic springs (5, 6) are pretensioned in the rest state of the system by a magnitude corresponding to at least half of the displacement path of the sensor carrier (3) FIG. 1.

REFERENCES:
patent: 4258319 (1981-03-01), Shimada et al.
patent: 4602555 (1986-07-01), Bushey
patent: 4682498 (1987-07-01), Kreiskorte
patent: 4855678 (1989-08-01), Krieskorte

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