Surface testing device with reciprocating sensor
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United States of America Patent
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Sep 24, 1991
Grant Date -
N/A
app pub date -
Nov 16, 1989
filing date -
Nov 26, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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