A temperature and strain sensor based on a cascade of double fiber Bragg grating

Wu, Hao; Lin, Qijing; Zhang, Fuzheng; Li, Lei; Zhao, Libo

doi:10.1088/1361-6501/ab093e

Cited by 23 publications

(11 citation statements)

References 26 publications

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“…Allsop et al [21] pasted 40 FBG arrays on the vest to generate 20 curvature sensors to generate a real-time 3D shape sensing scheme, which has been used to monitor the movement of the chest and abdomen during breathing. Chang and Wu et al [22,23] used FBG system to detect temperature and strain. The sensors are used in different places and packaged in different ways.…”

Section: Discussionmentioning

confidence: 99%

Accuracy of position tracking and fabrication of thin diameter sensor

Chen¹,

Zhang²,

Qian³

et al. 2021

Meas. Sci. Technol.

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The shape reconstruction of medical surgical instruments in robotic laryngeal surgery, positioning a needle to puncture a breast tumour, shape display during intestinal endoscopy, and positioning a cardiac vascular catheter, is affected by not only the end position and the shape reconstruction accuracy but also the diameter and curvature of the sensor owing to the limited application space. A sensor with a substrate is manufactured by pasting a fibre Bragg grating (FBG) on the surface of nitinol wire. The measuring range of the substrate is improved by applying a certain preload before glue injection. The sensor has the advantages of being less prone to breakage and greater durability but has a limited bending curvature and diameter. In minimally invasive surgery, the curvature of the body cavity is complex, and the space is narrow, and thus the FBG sensor must have a smaller diameter and good bending curvature. The present paper proposes a method of filling and encapsulating a small-diameter substrate sensor. A substrate-less sensor with a diameter of 1.5 mm and sensing length of 200 mm is encapsulated by improving the packaging positioning piece, current glue injection method, and packaging process. Four FBGs with two grating points for each fibre are distributed at 90° to each other, and four measuring points are obtained by wavelength division multiplexing and space division multiplexing. A calibration and shape reconstruction experiment is carried out for the shape sensor, while a packaging error compensation calibration method is introduced to improve the precision of shape reconstruction. Results of a two-dimensional experiment show that the shape reconstruction accuracy of the sensor on the plane bending is 2.71%. In a three-dimensional spiral experiment, the measurement accuracy of FBG shape sensor out-of-plane bending is 3.42%.

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Section: Discussionmentioning

confidence: 99%

Accuracy of position tracking and fabrication of thin diameter sensor

Chen¹,

Zhang²,

Qian³

et al. 2021

Meas. Sci. Technol.

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“…For all calculations, only the first order diffraction and fundamental mode have been considered. Coupled mode equations of a Bragg grating with R and S as complex-amplitudes of forward-running and backward-running modes considered for analysis are (8) and (9).…”

Section: Waveguide Bragg Gratingmentioning

confidence: 99%

“…By design, Bragg gratings are not point sensors as their response depends on the conditions throughout its length. This makes Bragg gratings and particularly fibre Bragg gratings (FBG) an economically attractive solution for various sensing applications [6][7][8]. Optical MEMS sensors based on the interaction of MEMS structure with free space light or light in the optical fibre are limited in scope as they cannot be subject directly to vibration or acceleration.…”

Section: Introductionmentioning

confidence: 99%

Novel High-Resolution Lateral Dual-Axis Quad-Beam Optical MEMS Accelerometer Using Waveguide Bragg Gratings

Malayappan

Krishnaswamy²,

Pattnaik

2020

Photonics

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A novel lateral dual-axis a-Si/SiO2 waveguide Bragg grating based quad-beam accelerometer with high-resolution and large linear range has been presented in this paper. The sensor consists of silicon bulk micromachined proof mass suspended by silica beams. Three ridge gratings are positioned on the suspending beam and proof mass to maximize sensitivity and reduce noise. Impact of external acceleration in the sensing direction on the Bragg wavelength of gratings and MEMS structure has been modelled including the effects of strain, stress and temperature variation. Acceleration induces stress in the beam thus modifying the grating period and introducing chirp. The differential wavelength shift with respect to reference grating on the proof mass is the measure of acceleration. To compensate for the effect of the weight of the proof mass and increase the sensitivity of the sensor, electrostatic force of repulsion is applied to the proof mass. For the chosen parameters, the designed sensor has a linear response over a large range and a sensitivity of 30 pm/g. The temperature of surroundings, which acts as noise in sensor performance is compensated by taking differential wavelength shift with respect to reference grating. By design and choice of material, low cross-axis sensitivity is achieved. The proposed design enables a high-resolution well below 1 μ g/ Hz and is suitable for inertial navigation and seismometry applications.

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“…In 2017, Liu Yanchao et al [24] proposed a method for the in situ detection of lithium-ion batteries by pasting gold-plated fiber Bragg grating (FBG) sensors during the production of lithium-ion batteries. In 2019, Wu Hao et al [25] used gold-plated grating and quartz grating cascades to realize the temperature and strain sensing measurements; the temperature response sensitivity was 26.5 pm/ • C in the range of 30-70 • C, and the strain response sensitivity was 1.19 pm/µε up to 400 µε. In the same year, I. Laarossi et al [26] used gold-plated gratings to measure the temperature and strain; the measurement response sensitivity was 1.10 pm/µε and 3.7 pm/ • C, respectively.…”

Section: Introductionmentioning

confidence: 99%

Research on the High Temperature and High Pressure Gold-Plated Fiber Grating Dual-Parameter Sensing Measurement System

et al. 2022

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In electrohydrostatic drive actuators, there is a demand for temperature and pressure monitoring in complex environments. Fiber Bragg grating (FBG) has become a promising sensor for measuring temperature and pressure. However, there is a cross-sensitivity between temperature and pressure. A gold-plated FBG is proposed and manufactured, and an FBG is used as a reference grating to form a parallel all-fiber sensing system, which can realize the simultaneous measurement of pressure and temperature. Based on the simulation software, the mechanical distribution of the pressure diaphragm is analyzed, and the fixation scheme of the sensor is determined. Using the demodulator to monitor the changes in the reflectance spectrum in real-time, the pressure and ambient temperature applied to the sensor are measured. The experimental results show that the temperature sensitivity of gold-plated FBG is 3 times that of quartz FBG, which can effectively distinguish the temperature changes. The pressure response sensitivity of gold-plated FBG is 0.3 nm/MPa, which is same as the quartz FBG. Through the sensitivity matrix equation, the temperature and pressure dual-parameter sensing measurement is realized. The accuracy of the temperature and pressure measurement is 97.7% and 99.0%, and the corresponding response rates are 2.7 ms/°C and 2 ms/MPa, respectively. The sensor has a simple structure and high sensitivity, and it is promising to be applied in health monitoring in complex environments with a high temperature and high pressure.

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A temperature and strain sensor based on a cascade of double fiber Bragg grating

Cited by 23 publications

References 26 publications

Accuracy of position tracking and fabrication of thin diameter sensor

Accuracy of position tracking and fabrication of thin diameter sensor

Novel High-Resolution Lateral Dual-Axis Quad-Beam Optical MEMS Accelerometer Using Waveguide Bragg Gratings

Research on the High Temperature and High Pressure Gold-Plated Fiber Grating Dual-Parameter Sensing Measurement System

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