A Wireless Ultrasonic Guided Wave Structural Health Monitoring System for Aircraft Wing Inspection

Zhao, Xiang; Qian, Tao; Popović, Zoya; Zane, Regan; Mei, Gang; Walsh, Corinne M.; Paing, Thurein; Kwan, Chiman

doi:10.1063/1.2718149

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Zhao et al [26] presented a miniaturized diagnostic device with an on-board ultrasonic pulser, multiplexed A/D converter, microcontroller and a wireless module, which is embedded into an aircraft wing with a PZT sensor network. Power to the electronics is delivered wirelessly with a microwave antenna rectifier array, designed to conform to the aircraft wing and which provide at least 15 V, 100 mW of DC power, when continuously illuminated with a power density of at most 10 mW cm À2 from an 8 W, 10 GHz source at a range between 0.5 and 1 m. Using this technology, the same authors claimed in [27] a good potential for crack and corrosion monitoring on complex panel structures such as an aircraft wing using a pulser designed on a half-bridge series resonant inverter with an isolated output, which can generate 70 V peak-to-peak tone-burst pulses every 10 ms, for a total power consumption of less than 30 mW for 0.2% duty cycle operation.…”

Section: Introductionmentioning

confidence: 99%

Energy-efficient Method for Embedded In Situ Structural Health Monitoring

Lallart

Monnier

Guyomar

2010

Structural Health Monitoring

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This article introduces the principles of an ultra low-cost scheme for in situ, embedded structural health monitoring. Based on the interactions of a Lamb wave with the structure, the proposed technique relies in comparing the time period where the sensed signature of the Lamb wave is greater than an user-defined threshold with a reference value. Compared to similar methods based on the monitoring of the structural state evolution, the proposed scheme is ultra low-cost, and therefore suitable for integrated systems that have a limited amount of available energy.

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Section: Introductionmentioning

confidence: 99%

Energy-efficient Method for Embedded In Situ Structural Health Monitoring

Lallart

Monnier

Guyomar

2010

Structural Health Monitoring

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“…Other relevant dimensions are shown in the figure. A polyvinylidene fluoride (PVDF) comb transducer which can generate an A 1 mode Lamb wave at 3 MHz [13] is mounted at one end of the plate and used to detect the simulated defect in a pulse-echo mode. The wireless test setup is shown in figure 4, where a transmitting short monopole is connected to an ultrasonic pulser for emitting RF energy; an on-board monopole antenna is connected to the PVDF transducer for receiving the RF energy that excites the PVDF transducer, and the defect echo signals are transmitted back to an active receiving monopole connected to a signal receiver/digitizer.…”

Section: The Direct Rf Capacitive Coupling Approachmentioning

confidence: 99%

Active health monitoring of an aircraft wing with an embedded piezoelectric sensor/actuator network: II. Wireless approaches

Zhao

Qian

Mei

et al. 2007

Smart Mater. Struct.

132

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The objective of this study is to develop a wireless ultrasonic structural health monitoring (SHM) system for aircraft wing inspection. In part I of the study (Zhao et al 2007 Smart Mater. Struct. 16 1208–17), small, low cost and light weight piezoelectric (PZT) disc transducers were bonded to various parts of an aircraft wing for detection, localization and growth monitoring of defects. In this part, two approaches for wirelessly interrogating the sensor/actuator network were developed and tested. The first one utilizes a pair of reactive coupling monopoles to deliver 350 kHz RF tone-burst interrogation pulses directly to the PZT transducers for generating ultrasonic guided waves and to receive the response signals from the PZTs. It couples enough energy to and from the PZT transducers for the wing panel inspection, but the signal is quite noisy and the monopoles need to be in close proximity to each other for efficient coupling. In the second approach, a small local diagnostic device was developed that can be embedded into the wing and transmit the digital signals FM-modulated on a 915 MHz carrier. The device has an ultrasonic pulser that can generate 350 kHz, 70 V tone-burst signals, a multiplexed A/D board with a programmable gain amplifier for multi-channel data acquisition, a microprocessor for circuit control and data processing, and a wireless module for data transmission. Power to the electronics is delivered wirelessly at X-band with an antenna–rectifier (rectenna) array conformed to the aircraft body, eliminating the need for batteries and their replacement. It can effectively deliver at least 100 mW of DC power continuously from a transmitter at a range of 1 m. The wireless system was tested with the PZT sensor array on the wing panel and compared well with the wire connection case.

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“…A number of methods have been proposed for detecting damage based upon comparison to baseline data obtained from the undamaged structure [1][2][3] . The idea of baseline comparison also serves as the foundation for various imaging algorithms which have been proposed for localizing damage [4][5][6][7] . If the structure is simple with a low feature density and the environment (e.g., temperature, loads, surface conditions) is controlled, then many algorithms are effective for both detection and localization of damage 8 .…”

Section: Introductionmentioning

confidence: 99%

An integrated strategy for detection and imaging of damage using a spatially distributed array of piezoelectric sensors

Michaels

2007

SPIE Proceedings

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Permanently attached piezoelectric sensors arranged in a spatially distributed array are under consideration for structural health monitoring systems. Ultrasonic signals transmitted and received between various array elements have been shown to be effective for localizing discrete sites of damage using algorithms based upon changes in signals compared to the undamaged state. Necessary to the success of the various imaging methods which have been proposed is a set of baseline signals recorded under the same conditions as the signals acquired after damage has occurred. Since many conditions other than structural damage can cause changes in ultrasonic signals, proposed here is an integrated strategy whereby damage is first detected and is localized only if the outcome of the detection step is positive. In this manner false alarms can be reduced since signal changes due to benign variations will not be localized and erroneously identified as damage. The detection strategy considers the long time behavior of the signals in the diffuse-like regime where distinct echoes can no longer be identified, whereas the localization strategy is to generate images of damage based upon the early time regime when discrete echoes from boundary reflections and scattering sites are meaningful. Results are shown for an aluminum plate subjected to a combination of temperature variations and introduction of artificial damage.

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A Wireless Ultrasonic Guided Wave Structural Health Monitoring System for Aircraft Wing Inspection

Cited by 6 publications

References 2 publications

Energy-efficient Method for Embedded In Situ Structural Health Monitoring

Energy-efficient Method for Embedded In Situ Structural Health Monitoring

Active health monitoring of an aircraft wing with an embedded piezoelectric sensor/actuator network: II. Wireless approaches

An integrated strategy for detection and imaging of damage using a spatially distributed array of piezoelectric sensors

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