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Title: Acoustic sensor for real-time control for the inductive heating process

Abstract

Disclosed is a system and method for providing closed-loop control of the heating of a workpiece by an induction heating machine, including generating an acoustic wave in the workpiece with a pulsed laser; optically measuring displacements of the surface of the workpiece in response to the acoustic wave; calculating a sub-surface material property by analyzing the measured surface displacements; creating an error signal by comparing an attribute of the calculated sub-surface material properties with a desired attribute; and reducing the error signal below an acceptable limit by adjusting, in real-time, as often as necessary, the operation of the inductive heating machine.

Inventors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174519
Patent Number(s):
6,628,404
Application Number:
09/718,293
Assignee:
Sandia Corporation (Albuquerque, NM)
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Kelley, John Bruce, Lu, Wei-Yang, and Zutavern, Fred J. Acoustic sensor for real-time control for the inductive heating process. United States: N. p., 2003. Web.
Kelley, John Bruce, Lu, Wei-Yang, & Zutavern, Fred J. Acoustic sensor for real-time control for the inductive heating process. United States.
Kelley, John Bruce, Lu, Wei-Yang, and Zutavern, Fred J. Tue . "Acoustic sensor for real-time control for the inductive heating process". United States. https://www.osti.gov/servlets/purl/1174519.
@article{osti_1174519,
title = {Acoustic sensor for real-time control for the inductive heating process},
author = {Kelley, John Bruce and Lu, Wei-Yang and Zutavern, Fred J.},
abstractNote = {Disclosed is a system and method for providing closed-loop control of the heating of a workpiece by an induction heating machine, including generating an acoustic wave in the workpiece with a pulsed laser; optically measuring displacements of the surface of the workpiece in response to the acoustic wave; calculating a sub-surface material property by analyzing the measured surface displacements; creating an error signal by comparing an attribute of the calculated sub-surface material properties with a desired attribute; and reducing the error signal below an acceptable limit by adjusting, in real-time, as often as necessary, the operation of the inductive heating machine.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2003},
month = {9}
}

Patent:

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