High Precision Fiber Bragg Grating Pressure Sensor with Real-Time Temperature Compensation

Shaoling, 何少灵 He; Fenghuan, 郝凤欢 Hao; Pengfei, 刘鹏飞 Liu; Weibing, 桑卫兵 Sang; Rui, 刘瑞 Liu; Huiliang, 葛辉良 Ge

doi:10.3788/cjl201542.0605003

Cited by 3 publications

(2 citation statements)

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“…基于光纤布拉格光栅传感器和三点弯曲测试法，推导了一个具有普适性的、可以测量任意刚性固体材料的杨氏模量的公式，并分别对铁梁和铜梁的杨氏模量测量进行了实验研究，实验结果表明， FBG 的反射中心波长与负荷具有良好的线性关系且 FBG 粘贴位置对测量结果影响不大，实验测得铁梁和铜梁的杨氏模量与标称值的误差分别为 0.5%和 0.6%。虽然本测量方法只对金属梁的杨氏模量进行了测量，但是由于 FBG 具有较高的微应变灵敏度，因此该方法也适用于形变较小的其他刚性固体材料的杨氏模量测量，并且依据此方法还可以对一些大型土木结构的弹性模量进行测量，实现重要部位结构的健康状况监测 [22] 。上述对 FBG 的所有测量结果中，并未考虑与横梁试件粘贴质量，若在实验中尽量提高光栅的粘贴质量，并加入温度补偿的装置 [23] ，则系统测量的精确度将进一步提高 [24] 。参考文献…”

Section: 结论unclassified

Young′s Modulus Measurement of Metal Beams Based on Fiber Bragg Grating

Wenwen¹,

Juan²,

Li³

et al. 2016

激光与光电子学进展

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A novel technique for measuring Young′s modulus of metal beams based on fiber Bragg gratings (FGBs) and three-point bend test is proposed. The FBG is sticked on the target metal beam and the three-point bend test method is used to load the force on the sheet. A universal formula for measuring Young′s modulus of various sheetshaped solid materials is derived, which is used for the experimental measurement of the Young′s modulus of iron and copper sheets. Experimental results show that the measurement errors of the two metal beams are 0.5% and 0.6% comparing to the nominal Young′s modulus, and the relationship between the reflected central wavelength and the loaded force is a good linearity. Moreover, the stick location of FBG has a negligible impact on the measurement precision. The proposed method has a potential application prospect in the field of Young′s modulus measurement of solid materials.

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Section: 结论unclassified

Young′s Modulus Measurement of Metal Beams Based on Fiber Bragg Grating

Wenwen¹,

Juan²,

Li³

et al. 2016

激光与光电子学进展

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“…Of the numerous contact temperature sensors available, fibre Bragg grating (FBG) temperature sensors have the advantages of small size, high accuracy, strong resistance to electromagnetic interference, and the ability to achieve distributed sensing [8][9][10][11][12][13][14]. They are widely used in hightemperature and harsh environments in the energy, petroleum, and aerospace industries.…”

Section: Introductionmentioning

confidence: 99%

Temperature field reconstruction based on femtosecond laser prepared of multiwavelength fibre bragg grating array

Niu,

Si,

Chen

et al. 2024

Meas. Sci. Technol.

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Temperature field measurements are of great significance in industrial production, scientific research, and other fields. Contact temperature measurements usually achieve high spatial resolution by increasing the layout density of the sensors. However, in practical applications, achieving high-density sensor placement is often difficult. Therefore, when the number of sensors is limited, it is necessary to perform function fitting or interpolation of the temperature of the sampling points to reconstruct the temperature field distribution. This study proposed a temperature field reconstruction method based on femtosecond laser prepared multiwavelength fibre Bragg grating (FBG) array. A multiwavelength FBG array was prepared using the femtosecond laser phase mask method combined with stress stretching, and applied for measuring the temperature field distribution in a tubular high-temperature furnace. Cubic spline interpolation and backpropagation (BP) neural networks were used to construct two-dimensional temperature field models for the temperature field distribution data measured by the FBGs, and the prediction accuracies of the two models were compared. The test results show that the root mean square error (RMSE) of the temperature field distribution constructed using the BP neural network is 0.7333 ℃, which is approximately 23.18% of the predicted results of the cubic spline interpolation model, indicating that it is a high-precision temperature field reconstruction method.

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Development in Fiber Bragg Grating Sensing Technology

蒋¹

2018

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A V-band sub-harmonic mixer with an integrated frequency doubler and a 180 out-of-phase splitter using standard 0.13 lm CMOS technology is reported. The sub-harmonic mixer comprises a current-reused bleeding mixer, a baseband amplifier, a 180 (Wilkinsonpower-divider-based) out-of-phase splitter, and a frequency doubler. The mixer consumed 31.5 mW and achieved input return loss at RF port better than À10 dB for frequencies from 49.8 to 63 GHz. At IF of 20 MHz, the mixer achieved maximum conversion gain of 9.5 dB at RF of 53 GHz. The corresponding 3-dB bandwidth (x 3dB ) of RF is 9.6 GHz (48.4-58 GHz). The measured LO-to-RF and LO-to-IF isolation were better than 50 dB over the frequency band of interest. In addition, the measured input 1-dB compression point (P 1dB ) and input third-order intermodulation point were À8 dBm and 2.2 dBm, respectively, at RF of 60 GHz. These results demonstrate the proposed mixer architecture is very promising for high-performance V-band RFIC applications.

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High Precision Fiber Bragg Grating Pressure Sensor with Real-Time Temperature Compensation

Cited by 3 publications

References 0 publications

Young′s Modulus Measurement of Metal Beams Based on Fiber Bragg Grating

Young′s Modulus Measurement of Metal Beams Based on Fiber Bragg Grating

Temperature field reconstruction based on femtosecond laser prepared of multiwavelength fibre bragg grating array

Development in Fiber Bragg Grating Sensing Technology

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