US 12,411,112 B2
Transducer, device and method for monitoring integrity of an adhesive bond
Zheng Zheng Wong, Singapore (SG); Kui Yao, Singapore (SG); Shuting Chen, Singapore (SG); and Lei Zhang, Singapore (SG)
Assigned to Agency for Science, Technology and Research, Singapore (SG)
Appl. No. 17/286,318
Filed by AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, Singapore (SG)
PCT Filed Oct. 25, 2019, PCT No. PCT/SG2019/050526
§ 371(c)(1), (2) Date Apr. 16, 2021,
PCT Pub. No. WO2020/086003, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10201809486R (SG), filed on Oct. 26, 2018.
Prior Publication US 2021/0341427 A1, Nov. 4, 2021
Int. Cl. G01N 29/11 (2006.01); G01N 29/04 (2006.01); G01N 29/24 (2006.01)
CPC G01N 29/11 (2013.01) [G01N 29/043 (2013.01); G01N 29/2418 (2013.01); G01N 2291/0235 (2013.01); G01N 2291/0237 (2013.01); G01N 2291/267 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A transducer for monitoring integrity of an adhesive bond between a first element and a second element, the transducer comprising:
a transducing adhesive,
the transducing adhesive provided to act as at least one of:
an actuator configured to convert a first electrical signal to a first acoustic signal, and
a sensor configured to convert a second acoustic signal to a second electrical signal,
the transducing adhesive comprising:
(i) an adhesive inherently having a piezoelectric effect,
(ii) a mixture of an epoxy adhesive and a lead-free piezoelectric ceramic particles, or
(iii) a combination of (i) and (ii); and
an electrode provided on the transducing adhesive, the electrode provided to perform at least one of:
providing a third electrical signal to the transducing adhesive, and
receiving a fourth electrical signal from the transducing adhesive,
the first acoustic signal being the same as or different from the second acoustic signal, the first electrical signal being the same as or different from the second electrical signal, the third electrical signal, or the fourth electrical signal, the second electrical signal being the same as or different from the third electrical signal or the fourth electrical signal, the third electrical signal being the same as or different from the fourth electrical signal,
the transducer being at least partially provided in the adhesive bond between the first element and the second element, at least one of the first acoustic signal and the second acoustic signal being passed through the adhesive bond.