Systems and methods for monitoring material properties using mic

Details Systems and methods for monitoring material properties using mic Systems and methods for monitoring material properties using mic

1995-09-20

1997-07-15

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Measuring, testing, or inspecting

264490, 264 401, 324634, 324636, 324639, 425135, 425143, 4251744, B29C 7104, B29C 3508

Patent

active

056480385

ABSTRACT:
Systems and methods for monitoring workpiece and workpiece material characteristics using microwave energy are disclosed. A system includes a chamber, including means for generating variable frequency microwave energy; means for positioning a workpiece within the chamber; means for subjecting the workpiece to a plurality of different microwave frequencies; and means for monitoring characteristics of the workpiece. One or more characteristics of a workpiece, or workpiece material, may be monitored by positioning the workpiece within a chamber having means for generating variable frequency microwave energy; subjecting the workpiece to microwave irradiation at a plurality of frequencies; detecting power reflection for each one of the plurality of microwave frequencies to provide power reflection data; and comparing the power reflection data to a predetermined set of power reflection data. The result of signature analysis can be coupled with a product process controller to achieve a real-time feedback control on monitoring and adjusting of process parameters.

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