Patent ID: 11968900
Assignee: XEROX CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus for poling a piezoelectric material, said apparatus comprising:
a platen which holds a sample of piezoelectric material to be poled;
a stage to which the platen is mounted, said stage being arranged to selectively move the platen and thereby the sample which the platen holds, said platen being movable by the stage selectively between a first position and a second position;
a corona source that generates a corona to which the sample is exposed when the platen is moved to the first position by the stage;
an electrostatic voltmeter having a probe, said electrostatic voltmeter measuring a surface potential of the sample when the platen is moved to the second position by the stage; and
a computer which compares the measured surface potential to a target value and, based on said comparing, if the measured surface potential is not the same as the target value, to within a set tolerance, controls movement of the platen so as to return the sample to the first position proximate the corona source for re-exposing the sample to the corona generated by the corona source.