Symmetry in Structural Model and Engineering Test Analysis by Using Monitoring Sensors

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Computer".

Deadline for manuscript submissions: closed (16 June 2022) | Viewed by 3817

Special Issue Editor


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Guest Editor
School of Civil Engineering, Dalian University of Technology, Dalian 116000, China
Interests: fiber optic sensing technology; structural safety monitoring
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Special Issue Information

Dear Colleagues,

Many structures have good geometric symmetry and mechanical symmetry, so symmetry has been an important concept in structural model tests and engineering tests. Using symmetry, structural models or finite element models can be greatly simplified, which can speed up the analysis time of structural models and reduce the cost of model tests. At present, various sensing technologies such as optical fiber sensors and piezoelectric sensors have been widely used in structural or environmental monitoring. The number of sensors, the complexity of sensor networks, and the ability of structural analysis have become important indicators in the monitoring system. Based on mechanical or geometric symmetry analysis, the number of sensors can be greatly optimized, the complexity of sensor networks can be reduced, and the integrity of the data used for structural or environmental analysis can be guaranteed. Furthermore, symmetry analysis also makes up for the lack of sensor monitoring ability to a certain extent. For example, some sensors can only sense tensile strain, so the strain in the compression area of the structure can be obtained by symmetry analysis; some key positions of structures do not make it easy to deploy sensors, so sensors can be deployed in their symmetrical positions.

Please note that all submitted papers must be within the general scope of the Symmetry journal.

We are soliciting contributions (research and review articles) covering a broad range of topics on various optical fiber sensors, piezoelectric sensors, laser gas sensors, and applied structural model analysis and engineering test analysis, including (though not limited to) the following keywords.

Dr. Jianping He
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • various optical fiber sensors
  • strain and temperature measurement
  • sensing network
  • structural model test
  • engineering test analysis
  • fabrication of advanced optical fiber sensors for symmetry analysis
  • integration technology of FRP material and optical fiber sensors
  • gas concentration monitoring
  • environmental monitoring
  • structure monitoring sensors

Published Papers (1 paper)

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Research

10 pages, 3141 KiB  
Article
Engine Knock Sensor Based on Symmetrical Rhomboid Structure-Encapsulated Fiber Bragg Grating
by Hongbo Song and Daqing Yin
Symmetry 2022, 14(4), 711; https://doi.org/10.3390/sym14040711 - 1 Apr 2022
Viewed by 2917
Abstract
Due to the improvement of environmental protection emission standards, new energy vehicles fueled by natural gas and hydrogen green clean energy have developed rapidly. However, knock is one of the most important parameters that must be monitored for the safe operation of natural [...] Read more.
Due to the improvement of environmental protection emission standards, new energy vehicles fueled by natural gas and hydrogen green clean energy have developed rapidly. However, knock is one of the most important parameters that must be monitored for the safe operation of natural gas and hydrogen engines, so higher requirements are put forward for the reliability and durability of knock sensors. At present, the common knock sensors are mainly electronic sensors based on magnetostrictive and piezoelectric principles, and the sensing signals are easily interfered by electromagnetic interference during use, which is not conducive to the accurate measurement and control of knock. In this paper, a new resonant knock sensor based on fiber Bragg grating (FBG) is proposed to meet the actual needs of knock monitoring, and the FBG sensor unit is encapsulated with symmetrical rhomboid structure. The natural frequency of rhomboid structure is simulated and analyzed by Ansys software. The natural frequency of rhomboid structure is measured by applying transient impact. The resonance frequency of sensor is analyzed by Matlab software. The theoretical analysis is consistent with the measured value, which verifies the feasibility of the new knock sensor. Compared with the traditional engine knock sensor, this resonant engine knock sensor based on FBG has more advantages in anti-electromagnetic interference and multi-point networking, which provides a new method for knock monitoring of new energy engines. Full article
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