Research on All-Fiber Dual-Modulation Optic Current Sensor Based on Real-Time Temperature Compensation

Wu, Jianhua; Zhang, Xiaofeng; Chen, Liang; Wu, Bing-Fei; Cheng, Peng

doi:10.1109/jphot.2022.3162114

Cited by 3 publications

(1 citation statement)

References 22 publications

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“…For instance, Chu et al [ 7 ] adopted double thermocouples to measure the airflow temperature and proposed a time domain compensation method to compensate for the airflow temperature measurement results. Wu et al [ 8 ] presented a method that utilizes pulsed light received by a Faraday rotating mirror to differentiate between the temperature and current. Lee et al [ 9 ] involved a fluorescence quenching-based gas sensor and a resistive temperature detector (RTD) with an integrated thermometer for in situ temperature monitoring and compensation.…”

Section: Introductionmentioning

confidence: 99%

Temperature Compensation of Wind Tunnel Balance Signal Detection System Based on IGWO-ELM

Dong,

Xu,

Cao

et al. 2023

Sensors

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The wind tunnel balance signal detection system is widely employed in aerospace applications for the accurate and automated measurement of aerodynamic forces and moments. However, measurement errors arise under different environmental temperature. This paper addresses the issue of measurement accuracy under different temperature conditions by proposing a temperature compensation method based on an improved gray wolf optimization (IGWO) algorithm and optimized extreme learning machine (ELM). The IGWO algorithm is enhanced by improving the initial population position, convergence factor, and iteration weights of the gray wolf optimization algorithm. Subsequently, the IGWO algorithm is employed to determine the optimal network parameters for the ELM. The calibration decoupling experiment and high-low temperature experiment are designed and carried out. On this basis, ELM, GWO-ELM, PSO-ELM, GWO-RBFNN and IGWO-ELM are used for temperature compensation experiments. The experimental results show that IGWO-ELM has a good temperature compensation effect, reducing the measurement error from 20%FS to within 0.04%FS. Consequently, the accuracy and stability of the wind tunnel balance signal detection system under different temperature environments are enhanced.

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Section: Introductionmentioning

confidence: 99%

Temperature Compensation of Wind Tunnel Balance Signal Detection System Based on IGWO-ELM

Dong,

Xu,

Cao

et al. 2023

Sensors

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Temperature stability analysis of the all-fiber current sensor with a loop structure

Zhu,

Zhao,

Liu

et al. 2024

Laser Phys.

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All-fiber optical current sensor (AFOCS) is a perfect product formed by the combination of fiber-optic sensing technology and the Faraday effect. It boasts significant advantages such as resistance to electromagnetic interference, a high measurement dynamic range and precision, low power consumption, low cost, and insulation. Additionally, it enables long-distance transmission, making it one of the main devices for current monitoring in smart grids. However, the birefringence within the sensing fiber is highly susceptible to changes in temperature, causing the polarization state of light to be extremely sensitive to temperature variations. This sensitivity significantly impacts the accuracy of current measurements. A novel loop structure AFOCS with a coupled fiber polarization rotator (FPR) is introduced in this paper. The operating principle of this structure is theoretically analyzed, and the Jones matrix is used to analyze the output light intensity signal and derive the error formula. After comparing the measurement accuracy of the basic AFOCS and the loop structure AFOCS, it is demonstrated that this novel structure can improve current sensitivity by enhancing the temperature robustness of the system. Additionally, the error generated by the FPR is controlled below 1%, meeting the requirements for stable system operation. Therefore, this novel structure effectively improves the accuracy of current measurement and exhibits strong temperature stability.

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Sagnac interferometer current transformer based on pulse multiplexing network structure

Zhao,

Li,

Zuo

et al. 2024

Appl. Opt.

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The monitoring of current plays an important role in accurately grasping the working status of the power system. In this paper, a Sagnac interferometer (SI) current transformer (CT) based on pulse multiplexing network structure is proposed. The network multiplexing structure can multiplex a pulsed light into multiple sensing signals, eliminating interference from light source power jitter and sudden changes in optical path loss. SI consists of a uniaxial working coupler, a 45° Faraday rotator, two quarter wave plates (QWPs), and spun fiber. The uniaxial working coupler used can achieve slow axis operation and fast axis cutoff, and convert light into linear polarization light. After passing QWPs, the forward and backward light changes from linear polarization to circular polarization, which can be used for current sensing. Experiments have shown that it has good linearity and repeatability. The proposed sensor has the advantages of low cost and simple structure, which has broad prospects in applications with not very high precision requirements.

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Research on All-Fiber Dual-Modulation Optic Current Sensor Based on Real-Time Temperature Compensation

Cited by 3 publications

References 22 publications

Temperature Compensation of Wind Tunnel Balance Signal Detection System Based on IGWO-ELM

Temperature Compensation of Wind Tunnel Balance Signal Detection System Based on IGWO-ELM

Temperature stability analysis of the all-fiber current sensor with a loop structure

Sagnac interferometer current transformer based on pulse multiplexing network structure

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