Non-contact capacitance based image sensing method and system
A system and a method is provided for imaging desired surfaces of a workpiece. A sensor having first and second sensing electrodes which are electrically isolated from the workpiece is positioned above and in proximity to the desired surfaces of the workpiece. An electric field is developed between the first and second sensing electrodes of the sensor in response to input signals being applied thereto and capacitance signals are developed which are indicative of any disturbances in the electric field as a result of the workpiece. An image signal of the workpiece may be developed by processing the capacitance signals. The image signals may provide necessary control information to a machining device for machining the desired surfaces of the workpiece in processes such as deburring or chamfering. Also, the method and system may be used to image dimensions of weld pools on a workpiece and surfaces of glass vials. The sensor may include first and second preview sensors used to determine the feed rate of a workpiece with respect to the machining device. 18 figures.
- DOE Contract Number:
- AC04-76DP00789
- Assignee:
- SNL; EDB-95-029159
- Patent Number(s):
- US 5378994; A
- Application Number:
- PPN: US 8-163555
- OSTI ID:
- 6659108
- Resource Relation:
- Patent File Date: 9 Dec 1993
- Country of Publication:
- United States
- Language:
- English
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Non-contact capacitance based image sensing method and system
Non-contact capacitance based image sensing method and system
Related Subjects
MACHINE TOOLS
PROCESS CONTROL
MATERIALS
MACHINING
IMAGE PROCESSING
MEASURING INSTRUMENTS
CONTROL
PROCESSING
TOOLS
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