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Title: System and method of reducing motion-induced noise in the optical detection of an ultrasound signal in a moving body of material

Abstract

The present invention provides a system and method to reduce motion-induced noise in the detection of ultrasonic signals in a moving sheet or body of material. An ultrasonic signal is generated in a sheet of material and a detection laser beam is moved along the surface of the material. By moving the detection laser in the same direction as the direction of movement of the sheet of material the amount of noise induced in the detection of the ultrasonic signal is reduced. The scanner is moved at approximately the same speed as the moving material. The system and method may be used for many applications, such in a paper making process or steel making process. The detection laser may be directed by a scanner. The movement of the scanner is synchronized with the anticipated arrival of the ultrasonic signal under the scanner. A photodetector may be used to determine when a ultrasonic pulse has been directed to the moving sheet of material so that the scanner may be synchronized the anticipated arrival of the ultrasonic signal.

Inventors:
 [1];  [2];  [3]
  1. Atlanta, GA
  2. Smyrna, GA
  3. Decatur, GA
Publication Date:
Research Org.:
Institute of Paper Science and Technology, Inc. (Atlanta, GA)
OSTI Identifier:
874283
Patent Number(s):
US 6356846
Assignee:
Institute of Paper Science and Technology, Inc. (Atlanta, GA)
DOE Contract Number:  
FC07-97ID13578
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; reducing; motion-induced; noise; optical; detection; ultrasound; signal; moving; material; provides; reduce; ultrasonic; signals; sheet; generated; laser; beam; moved; surface; direction; movement; amount; induced; reduced; scanner; approximately; speed; applications; paper; process; steel; directed; synchronized; anticipated; arrival; photodetector; determine; pulse; laser beam; ultrasonic pulse; optical detection; sonic signal; /702/73/

Citation Formats

Habeger, Jr., Charles C., LaFond, Emmanuel F, Brodeur, Pierre, and Gerhardstein, Joseph P. System and method of reducing motion-induced noise in the optical detection of an ultrasound signal in a moving body of material. United States: N. p., 2002. Web.
Habeger, Jr., Charles C., LaFond, Emmanuel F, Brodeur, Pierre, & Gerhardstein, Joseph P. System and method of reducing motion-induced noise in the optical detection of an ultrasound signal in a moving body of material. United States.
Habeger, Jr., Charles C., LaFond, Emmanuel F, Brodeur, Pierre, and Gerhardstein, Joseph P. Tue . "System and method of reducing motion-induced noise in the optical detection of an ultrasound signal in a moving body of material". United States. https://www.osti.gov/servlets/purl/874283.
@article{osti_874283,
title = {System and method of reducing motion-induced noise in the optical detection of an ultrasound signal in a moving body of material},
author = {Habeger, Jr., Charles C. and LaFond, Emmanuel F and Brodeur, Pierre and Gerhardstein, Joseph P},
abstractNote = {The present invention provides a system and method to reduce motion-induced noise in the detection of ultrasonic signals in a moving sheet or body of material. An ultrasonic signal is generated in a sheet of material and a detection laser beam is moved along the surface of the material. By moving the detection laser in the same direction as the direction of movement of the sheet of material the amount of noise induced in the detection of the ultrasonic signal is reduced. The scanner is moved at approximately the same speed as the moving material. The system and method may be used for many applications, such in a paper making process or steel making process. The detection laser may be directed by a scanner. The movement of the scanner is synchronized with the anticipated arrival of the ultrasonic signal under the scanner. A photodetector may be used to determine when a ultrasonic pulse has been directed to the moving sheet of material so that the scanner may be synchronized the anticipated arrival of the ultrasonic signal.},
doi = {},
url = {https://www.osti.gov/biblio/874283}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

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