Passive wireless SAW sensors for IVHM

Wilson, William C.; Perey, Daniel F.; Atkinson, Gary M.; Barclay, Rebecca O.

doi:10.1109/freq.2008.4623003

Cited by 17 publications

(13 citation statements)

References 33 publications

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“…In case of the other temperature extreme, i.e. for cryogenic environments, the successful operation of the SAW sensors have been studied and demonstrated [13] Since these sensors can withstand high temperatures up to about 1500 °C and have a high resistance to ionizing radiation (demonstrated tolerance-upto 10 Mrad) without power loss, they are a promising contender for space applications [13]. Although SAW sensors provide several benefits for such critical applications, one of the main challenges for the continuous wireless operation of these sensors is power generation.…”

Section: Fig 1 a Basic Saw Sensor (Adapted From [12])mentioning

confidence: 99%

Structural Health Monitoring (SHM) of Space Structures

Speckmann¹,

Haridas²

2021

Materials Research Proceedings

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Abstract. Recent years have seen an increased interest in exploring outer space for space tourism or for unmanned or manned planetary explorations. The captivated interests among various stakeholders to employ advanced technologies to meet the requirements of these missions have necessitated the use of newly developed asset monitoring systems to ensure robustness and mission reliability. Although, Non-Destructive Testing (NDT) methods provide sufficient information about the state of the structure at the time of inspection, the need for continuously monitoring the health of the structure throughout the mission has asserted the use of Structure Health Monitoring (SHM) technologies to increase the levels of safety and thereby, reducing the overall mission costs. However, since the implementation of SHM technologies for space missions can be affected by several factors including, environmental conditions, measurement reliability and unavailability of adequate standards, additional considerations on its employability must be reconsidered. This article demonstrates a structured approach to compare the capabilities of some of the most promising SHM technologies in consideration of these influential factors. Additionally, remarks on the feasibility of employing these SHM technologies and the role they could play in such critical missions would be elaborated.

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Section: Fig 1 a Basic Saw Sensor (Adapted From [12])mentioning

confidence: 99%

Structural Health Monitoring (SHM) of Space Structures

Speckmann¹,

Haridas²

2021

Materials Research Proceedings

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“…Depositions of AlN films onto alloy substrates, especially on the titanium alloy, could also be advantageous, though were rarely reported. [16][17][18][19][20] Such AlN films based on titanium alloy can also be used in piezoelectric MEMS devices. [16][17][18][19][20] Such AlN films based on titanium alloy can also be used in piezoelectric MEMS devices.…”

Section: Introductionmentioning

confidence: 99%

Growth of c-axis oriented AlN thin films on titanium alloy substrate by middle frequency magnetron sputtering

Jiang

Peng

Zhang

et al. 2015

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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A two-step deposition process was developed to deposit highly c-axis oriented AlN thin films on titanium alloy substrates by middle-frequency magnetron sputtering. Smooth AlN seed layer was first prepared on rough titanium alloy substrate at the first step. Then, c-axis oriented AlN films with small grain size were deposited at the second step. The effects of the growth time at the first and second step on the microstructure and the c-axis orientation of the AlN films were studied. It was found that the c-axis orientation of the AlN films is strongly dependent on the film thickness at the first step and the substrate temperature at the second step. With optimal process conditions, the full-width at half-maximum of the AlN (0002) peak rocking curve decreased to a minimum of 4.1° and the root-mean-square surface roughness of the prepared AlN films was 4.3 nm. The prepared AlN films have potential applications in piezoelectric microelectromechanical-systems and surface acoustic wave devices.

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“…One of the critical sensing needs, for these intelligent engines, is passive wireless temperature sensing. These temperature sensors will need to be able to survive in temperatures from cryogenic (-150 C) to temperatures greater than 1000 C. These temperature ranges make powering the sensors with batteries infeasible and often the placement of these sensors require them to be wireless [16].A current method for measuring temperature inside an aircraft engine is to use long massive wires to transmit the gathered data outside of the engine. These heavy wires have to be supported inside the aircraft with even heavier metal infrastructure.…”

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confidence: 99%

“…friction heating. These temperatures can reach above 1000 C [16]. The current temperature sensors along the vehicle's structure are wired.…”

Section: )mentioning

confidence: 99%

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Passive Wireless Temperature Sensing in Extreme Harsh Environments

Comparetto¹

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As the technology in the fields of aerospace and the US power generation industry advances, there is a critical need for new extreme high temperature sensing / monitoring technologies to replace the current out-of-date sensing systems. As the operating temperatures of these jet and turbine engines continue to rise over 1000 C, it is vitally important to monitor the extreme high temperatures in these engines for system health monitoring and to achieve greater engine efficiencies. We propose a new passive wireless temperature sensor capable of sensing these extreme high temperatures. The sensor uses an LC resonance circuit to measure the temperature through passive wireless communications. A new novel method of capturing large quantities of frequency information from the sensor is proposed and allows for advanced signal processing methods form other applications areas like wireless communications, radar, and radio astronomy to be implemented. The passive wireless LC resonance high temperature sensor was successfully able to sense temperatures up to 700 C.

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Passive wireless SAW sensors for IVHM

Cited by 17 publications

References 33 publications

Structural Health Monitoring (SHM) of Space Structures

Structural Health Monitoring (SHM) of Space Structures

Growth of c-axis oriented AlN thin films on titanium alloy substrate by middle frequency magnetron sputtering

Passive Wireless Temperature Sensing in Extreme Harsh Environments

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