High-Temperature Fiber-Optic Fabry–Perot Vibration Sensor Based on Single-Crystal Sapphire

Liu, Hua; Jia, Pinggang; Su, Chengxin; Zhao, Anna; Liu, Jia; Ren, Qianyu; Xiong, Jijun

doi:10.3390/s23104952

Cited by 6 publications

(1 citation statement)

References 30 publications

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“…In our previous studies, we proposed a vibration sensor based on silicon material, with a working temperature of 400 • C [28]. By optimizing the material composition and preparation process of the sensor sensitive unit, the working temperature of the sensor was improved to 800 • C [29].…”

Section: Introductionmentioning

confidence: 99%

Temperature-Decoupled Single-Crystal MgO Fiber-Optic Fabry–Perot Vibration Sensor Based on MEMS Technology for Harsh Environments

Su,

Jia,

Zhao

et al. 2024

Micromachines

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A high-temperature-resistance single-crystal magnesium oxide (MgO) extrinsic Fabry–Perot (FP) interferometer (EFPI) fiber-optic vibration sensor is proposed and experimentally demonstrated at 1000 °C. Due to the excellent thermal properties (melting point > 2800 °C) and optical properties (transmittance ≥ 90%), MgO is chosen as the ideal material to be placed in the high-temperature testing area. The combination of wet chemical etching and direct bonding is used to construct an all-MgO sensor head, which is favorable to reduce the temperature gradient inside the sensor structure and avoid sensor failure. A temperature decoupling method is proposed to eliminate the cross-sensitivity between temperature and vibration, improving the accuracy of vibration detection. The experimental results show that the sensor is stable at 20−1000 °C and 2−20 g, with a sensitivity of 0.0073 rad (20 °C). The maximum nonlinearity error of the vibration sensor measurement after temperature decoupling is 1.17%. The sensor with a high temperature resistance and outstanding dynamic performance has the potential for applications in testing aero-engines and gas turbine engines.

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Section: Introductionmentioning

confidence: 99%

Temperature-Decoupled Single-Crystal MgO Fiber-Optic Fabry–Perot Vibration Sensor Based on MEMS Technology for Harsh Environments

Su,

Jia,

Zhao

et al. 2024

Micromachines

Self Cite

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High-Temperature Fiber-Optic Vibration Sensor Based on an Atomic Frequency Standard

Cao,

Bai,

Zheng

et al. 2024

ACS Photonics

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As a vibration signal acquisition device, the vibration sensor has important application prospects in aerospace, industrial manufacturing, and other fields. The traditional electrical vibration sensor is limited by its material and sensitive mechanism and has some bottleneck problems, such as poor anti-electromagnetic interference ability, poor temperature resistance, and inability to self-calibrate. Here, we report a hightemperature self-calibration fiber-optic vibration sensor based on an atomic frequency standard system for the first time. The absolute stability of the transition frequency between atomic states ensures the accuracy and effectiveness of the acceleration measurement under extreme conditions. The sensor is based on the Fabry−Peŕot interference principle utilizing a sapphire material for the sensitive structure and enclosed in a high-reliability and rigid stainless-steel package for protection. The experimental results show that it operates at temperatures up to 600 °C with a sensitivity of 38.66 nm/g and a characteristic frequency of 2446 Hz. This work provides a new approach to improve the accuracy of fiber-optic sensing under harsh, on-site testing conditions.

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A piezoelectric vibration sensor with excellent performance based on Bi12SiO20 crystal for high-temperature applications

Wu,

Yao,

Liu

et al. 2024

Applied Physics Letters

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High-temperature piezoelectric vibration sensors play a crucial role in the accurate monitoring of the dynamic mechanical conditions in aerospace, automotive, and energy generation systems. However, the use of conventional piezoelectric materials in high-temperature environments is restricted owing to their limited Curie temperatures. In this study, we grew a piezoelectric crystal Bi12SiO20 (BSO) with the crystal cut optimized for high longitudinal piezoelectric coefficient and low piezoelectric crosstalk behaviors. Subsequently, a compression-type piezoelectric vibration sensor utilizing the BSO bulk crystal was developed and fabricated for structural health monitoring under high temperatures. The impact of pre-tightening torques on the sensor performance was investigated. Moreover, the sensor performance was analyzed under temperatures up to 650 °C. The BSO-based sensor exhibited an average sensitivity of ∼3.89 pC/g between 25 and 650 °C under 160 Hz frequency, with a variation of 5.5%. Additionally, the BSO-based sensor demonstrated ultra-stable sensitivity at 600 °C, highlighting its strong sensing capabilities and reliability under high temperatures. Thus, the BSO-based vibration sensor is a promising option for structural health monitoring applications under high temperatures.

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High-Temperature Fiber-Optic Fabry–Perot Vibration Sensor Based on Single-Crystal Sapphire

Cited by 6 publications

References 30 publications

Temperature-Decoupled Single-Crystal MgO Fiber-Optic Fabry–Perot Vibration Sensor Based on MEMS Technology for Harsh Environments

Temperature-Decoupled Single-Crystal MgO Fiber-Optic Fabry–Perot Vibration Sensor Based on MEMS Technology for Harsh Environments

High-Temperature Fiber-Optic Vibration Sensor Based on an Atomic Frequency Standard

A piezoelectric vibration sensor with excellent performance based on Bi12SiO20 crystal for high-temperature applications

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