US 12,140,566 B1
Apparatus, system and method for sensing the vibrations of even cross-sectional modes in a circular cylinder using a piezoelectric wire
Djamel Ouis, Dhahran (SA); and Mohammad Ahmad Hassanain, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Jul. 1, 2024, as Appl. No. 18/760,650.
Int. Cl. G01N 29/12 (2006.01); G01N 29/04 (2006.01); G01N 29/24 (2006.01); G01N 29/46 (2006.01)
CPC G01N 29/12 (2013.01) [G01N 29/045 (2013.01); G01N 29/2437 (2013.01); G01N 29/46 (2013.01); G01N 2291/014 (2013.01); G01N 2291/023 (2013.01); G01N 2291/2634 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A piezoelectric sensor for sensing an ovalling mode in a cylindrical structure, comprising:
an H-shaped caliper comprising a first arm, a second arm and a crossbar connected to and perpendicular to the first arm and the second arm;
a first caliper connector located near a first end of the first arm;
a second caliper connector located near a first end of the second arm;
a first wire connector located near a second end of the first arm;
a second wire connector located near a second end of the second arm;
a piezoelectric wire connected to the first wire connector and the second wire connector, wherein the piezoelectric wire is stretched between the first wire connector and the second wire connector; and
an electrical terminal connected to the piezoelectric wire at the second wire connector,
wherein the electrical terminal is configured to receive an electrical signal generated by the piezoelectric wire in response to expansion and contraction of a distance between the second end of the first arm and the second end of the second arm as a result of vibrations induced in the cylindrical structure.