Optical Submicrometer Displacement Sensor Based on the Herriot Cell

Campos-Puebla, Juan Jose; Sánchez‐Pérez, Celia; Argueta-Diaz, V.

doi:10.1109/jsen.2017.2654802

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…FBG demodulation unit. In order to measure the distributed stresses, the tunable Fabry-Perot (F-P) filter method is used to demodulate, 28 whose demodulation process is shown in Figure 12. The light signal emitted from the broadband light source is modulated through the isolator into the FBG stress sensor, and a set of narrowband light is reflected.…”

Section: DLmentioning

confidence: 99%

An online monitoring technology of tower foundation deformation of transmission lines

Huang

Zhao

Chen

et al. 2018

Structural Health Monitoring

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In this article, an online monitoring technology applied to transmission line towers is proposed to overcome the problems that the foundation deformation is difficult to find in the mining area, river, hillside, and other special areas. The measurement of the stress or the strain caused by the tower foundation deformation are rarely issued, though the tower status can be possibly assessed by the stress or the strain. A new online monitoring technology of tower foundation deformation of transmission lines is developed which consists of three parts. In the first part, the stress or the strain of the key elements is effectively analyzed under the different deformations such as foundation settlement, inclination, and side-slip with the tower finite element model built and the wind load and ice load applied on the tower. In the second part, the experimental platform of tower stress tests is set up, and the internal relations between the stress variation and the tower foundation deformation are determined. In the third part, the online monitoring technology of tower foundation deformation of transmission lines is developed based on fiber Bragg grating stress sensor and successfully applied in Jibei power grid in China. The results show that all the monitored stresses fluctuating with the wind speed are small in case that the condition of tower foundation is normal; on the contrary, the corresponding stresses will change greatly.

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Section: DLmentioning

confidence: 99%

An online monitoring technology of tower foundation deformation of transmission lines

Huang

Zhao

Chen

et al. 2018

Structural Health Monitoring

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“…Compared with these sensors, optical displacement sensors have the best electromagnetic compatibility in complicated electromagnetic environments [16][17][18]. Owing to their high precision and large measurement ranges, optical sensors, especially optical fiber displacement sensors, have attracted much attention in many fields.…”

Section: Introductionmentioning

confidence: 99%

A Displacement Sensing Method Based on Permanent Magnet and Magnetic Flux Measurement

Zhang

Shi

Huang

et al. 2022

Sensors

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This paper proposes a displacement sensing method based on magnetic flux measurement. A bridge-structured magnetic circuit, formed by permanent magnets and two ferromagnetic cores, is designed and discussed. The analyses of the equivalent magnetic circuit and three-dimensional finite element simulations showed that the magnetic flux density changes linearly with the reciprocal of the sum of a constant and the displacement. A prototype sensor of the bridge structure is developed that consists of four permanent magnets as excitation, a Hall sensor as reception, and two ferromagnetic cores as the connection. Experiments have validated the feasibility of this method. The measured results show a good linearity between the sensor’s output and the reciprocal of the sum of a constant and the displacement, with a correlation coefficient greater than 0.9995 across different measurement ranges. Additionally, the measured results significantly indicate that the proposed sensor is compatible with different ferromagnetic materials with a worst-case error of less than 5%. The proposed sensor has the advantages of low cost and good linearity; however, the test object is limited to ferromagnetic materials.

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Optical amplification for measuring minute displacement of laser beam

Zhu

et al. 2021

Journal of Modern Optics

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Optical Submicrometer Displacement Sensor Based on the Herriot Cell

Cited by 5 publications

References 19 publications

An online monitoring technology of tower foundation deformation of transmission lines

An online monitoring technology of tower foundation deformation of transmission lines

A Displacement Sensing Method Based on Permanent Magnet and Magnetic Flux Measurement

Optical amplification for measuring minute displacement of laser beam

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