Radiation, temperature, and vacuum effects on piezoelectric wafer active sensors

Giurgiutiu, Victor; Postolache, C.; Tudose, Mihai

doi:10.1088/0964-1726/25/3/035024

Cited by 18 publications

(14 citation statements)

References 12 publications

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“…Ursu, Toader and Enciu report the developments and the results of the first two years of the project, the main interest being focused on the description of the test protocols. Given that the project has enabled a very consistent database, Giurgiutiu, Tudose and Postolache propose an analytical approach for EMIS signature sensitivity in the presence of temperatures that simulate the conditions in outer space. More specifically, approximate sensitivities of resonant frequencies and amplitudes of the EMIS characteristics for temperature variations ranging from 0 to +200°C were determined.…”

Section: Introductionmentioning

confidence: 99%

New results concerning structural health monitoring technology qualification for transfer to space vehicles

Enciu

Ursu

Toader

2017

Struct. Control Health Monit.

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This article reports the results of recent complex tests on the survival, in view of space applications, of structural health monitoring (SHM) methodology that uses piezo wafer active sensors (PWAS) and the electromechanical impedance spectroscopy (EMIS) method. Successive and then concomitant actions of the harsh conditions of outer space, including extreme temperatures and radiation, were simulated in a laboratory. The basis of the method consists in the fact that the real part of the bonded PWAS impedance spectrum, the so‐called EMIS structure signature, follows the resonance behaviour of the structure vibrating under the PWAS excitation and, consequently, the onset and progress of structural damage with fidelity. The tests were conducted on the PWAS separately and aluminium discs with PWAS bonded on them as structural specimens. The conclusion of the tests is that the cumulative impact of severe conditions of temperature and radiation did not result in the decommissioning of the sensors or adhesive, which would have meant that the methodology was compromised. This conclusion occurs as a result of applying two new analysis methods to EMIS signatures. The first method, based on systematic observation of EMIS signatures during tests, makes it possible to distinguish between real damage with a mechanical origin and false damage, which is reversible and caused by the harsh environmental factors. A second method, based on the concept of entropy, shows how to identify mechanical damage at a certain distance from the PWAS. Moreover, an offline analysis of the EMIS “entropy” signatures supports the conclusion that the SHM technology survived the harsh environmental conditions.

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Section: Introductionmentioning

confidence: 99%

New results concerning structural health monitoring technology qualification for transfer to space vehicles

Enciu

Ursu

Toader

2017

Struct. Control Health Monit.

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“…Giurgiutiu et al analyzed the effects of radiation, temperature, and vacuum on PWAS. The comprehensive experiment describing combined influence of these effects suggested reliability of PWAS under such complex conditions [24].…”

Section: Radiation Effects On Piezoelectric Ceramic Sensorsmentioning

confidence: 99%

Investigating Effect of Space Radiation Environment on Piezoelectric Sensors: Cobalt-60 Irradiation Experiment

Anderson

Zagrai

Daniel³

et al. 2017

Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems

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Piezoelectric sensors are used in many structural health monitoring (SHM) methods to interrogate the condition of the structure to which the sensors are affixed or embedded. Among SHM methods utilizing thin wafer piezoelectric sensors, embedded ultrasonics is seen as a promising approach to assess condition of space structures. If SHM is to be implemented in space vehicles, it is imperative to determine the effects of the extreme space environment on piezoelectric sensors in order to discern between actual structural damage and environmental effects. The near-Earth space environment comprises extreme temperatures, vacuum, atomic oxygen, microgravity, micrometeoroids and debris, and significant amounts of radiation. Gamma radiation can be used to emulate the space radiation environment. In this contribution, the effects of gamma radiation on piezoelectric ceramic sensors are investigated for equivalent gamma radiation exposure of more than a year on low Earth orbit (LEO). Two experiments were conducted in which cobalt-60 was utilized as the source of radiation. Freely supported piezoelectric sensors were exposed to increasing levels of gamma radiation. Impedance data were collected for the sensors after each radiation exposure. The results show that piezoelectric ceramic material is affected by gamma radiation. Over the course of increasing exposure levels to cobalt-60, the impedance frequencies of the free sensors increased with each absorbed dose. The authors propose that the mechanism causing these impedance changes is due to gamma rays affecting piezoelectric, electric, and elastic constants of the piezoelectric ceramic. A theoretical model describing observed effects is presented.

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“…Structural health monitoring (SHM) has proved to be an effective technology in increasing the reliability of structures and reducing maintenance cost and is particularly attractive in many application fields [ 5 , 6 , 7 , 8 , 9 ]. As a matter of fact, SHM is already in the forefront of space applications—various SHM methods have been proposed by adopting different kinds of sensors, including the piezoelectric transducer (PZT) [ 10 ], fiber optic sensors [ 11 , 12 ], acoustic emission sensors [ 13 ] and micro-electromechanical systems (MEMS) [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Design of a Large-Scale Piezoelectric Transducer Network Layer and Its Reliability Verification for Space Structures

Ren

Tao

Xue

2020

Sensors

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As an effective structural health monitoring (SHM) technology, the piezoelectric transducer (PZT) and guided wave-based monitoring methods have attracted growing interest in the space field. When facing the large-scale monitoring requirements of space structures, a lot of PZTs are needed and may cause problems regarding to additional weight of connection cables, placement efficiency and performance consistency. The PZT layer is a promising solution against these problems. However, the current PZT layers still face challenges from large-scale lightweight monitoring and the lack of reliability assessment under extreme space service conditions. In this paper, a large-scale PZT network layer (LPNL) design method is proposed to overcome these challenges, by adopting a large-scale lightweight PZT network design method and network splitting–recombination based integration strategy. The developed LPNL offers the advantages of being large size, lightweight, ultra-thin, flexible, customized in shape and highly reliable. A series of extreme environmental tests are performed to verify the reliability of the developed LPNL under space service environment, including extreme temperature conditions, vibration at different flying phases, landing impact, and flying overload. Results show that the developed LPNL can withstand these harsh environmental conditions and presents high reliability and functionality.

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Radiation, temperature, and vacuum effects on piezoelectric wafer active sensors

Cited by 18 publications

References 12 publications

New results concerning structural health monitoring technology qualification for transfer to space vehicles

New results concerning structural health monitoring technology qualification for transfer to space vehicles

Investigating Effect of Space Radiation Environment on Piezoelectric Sensors: Cobalt-60 Irradiation Experiment

Design of a Large-Scale Piezoelectric Transducer Network Layer and Its Reliability Verification for Space Structures

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