The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2009
Filed:
Oct. 31, 2006
Mont A. Johnson, Perry, UT (US);
John L. Shipley, Tremonton, UT (US);
Robert Graham, Perry, UT (US);
Lee H. Pearson, Bear River City, UT (US);
Mont A. Johnson, Perry, UT (US);
John L. Shipley, Tremonton, UT (US);
Robert Graham, Perry, UT (US);
Lee H. Pearson, Bear River City, UT (US);
Alliant Techsystems Inc., Minneapolis, MN (US);
Abstract
A sensor for measuring material properties such as the relaxation modulus of a material in situ and a method of measuring material properties of a material are disclosed. The sensor may be substantially embedded in the material, and includes a deformable driver. When actuated, the deformable driver may create a stress in the adjacent material. The movement or deformation of the driver may be measured with a sensing device, for example a strain gage mounted on a surface thereof. The stress in the adjacent material may be measured with a second sensing device, for example a pressure sensor. The measured movement and stress over a predetermined period of time may he used to determine the relaxation modulus of the material.