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Simultaneous curvature and Temperature sensing Based on a Novel Mach-Zehnder Interferometer

Photonic Sensors 2020年第2期10卷 171-180页

作者： Xiaoyan SUN Haifeng DU Xinran DONG Youwang HU Ji’an DUAN State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China

A novel fiber inline Mach-Zehnder interferometer(MZI)is proposed for simultaneous measurement of curvature and *** sensor composes of single mode-multimode-dispersion compensation-multimode-single mode fiber(MMF-DCF-MMF)structure,using the direct fusion *** experimental results show curvature sensitivities of−12.82 nm/m^(−1) and−14.42 nm/m^(−1) in the range of 0−0.65 m^(−1) for two resonant dips,as well as temperature sensitivities of 57.6 pm/and 74.3℃pm/within the range of 20℃℃−*** addition,℃the sensor has unique advantages of easy fabrication,low cost,high fringe visibility of 24 dB,and high sensitivity,which shows a good application prospect in dual-parameters of sensing of curvature and temperature.

关键词： Mach-Zehnder interferometer curvature sensing temperature sensing simultaneous sensing

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Integrated Test System for Large-aperture Telescopes Based on Astrophotonics Interconnections

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Instrumentation 2024年第1期11卷 1-9页

作者： Qichang An Kun Wang Xinyue Liu Hongwen Li Jiakang Zhu Changchun Institute of Optical Precision Machinery and Physics Chinese Academy of SciencesChangchunJilin 130033China University of Chinese Academy of Sciences Beijing 100039China Jilin Key Laboratory of Intelligent Wavefront sensing and Control ChangchunJilin 130033China

This study aims to improve the integrated testing of large-aperture telescopes to clarify the fundamental principles of an integrated testing system based on *** demonstration and analyses focused on element-position sensing and modulation based on spatial near-geometric beams,high-throughput step-difference measurements based on channel spectroscopy,distributed broadband-transmittance testing,and standard spectral tests based on near-field energy *** analyses and experiments were conducted to confirm the feasibility of the proposed system in the integrated testing process of large-aperture *** results demonstrated that the angular resolution of the light rays exceeded 5arcsec,which satisfies the requirements for component-position detection in future large-aperture *** measurement resolution of the wavefront tilt was better than 0.45μ*** on the channel spectral method—which combined a high signal-to-noise ratio and high sensitivity,along with continuous-spectral digital segmentation and narrowband-spectral physical segmentation—a resolution of 0.050μm and a range of 50μm were *** calibration,the measurement resolution of the pupil deviation improved to exceed 4%accuracy,and the transmission measurements achieved a consistency of over 2%*** fringe-broadband interferometry measurements,the system maintained high stability,ensuring its operation within the coherence length,and robustly detected the energy without unwrapping the *** use of a projector for calibrating broadband-spectrum measurements led to a reduction in contrast from 0.8142 to 0.6038,which further validates the system's applicability in the integrated testing process of large-aperture *** study greatly enhanced the observational capabilities of large-aperture telescopes while reducing the integrated system's volume,weight,and power consumption.

关键词： curvature sensing wavefront aberration astrophotonics large-aperture telescope

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Soft curvature sensors for measuring the rotational angles of mechanical fingers

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Frontiers of Mechanical Engineering 2020年第4期15卷 610-621页

作者： Haixiao LIU Li LI Zhikang OUYANG Wei SUN School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China

The design, fabrication, and testing of soft sensors that measure elastomer curvature and mechanical finger bending are described in this study. The base of the soft sensors is polydimethylsiloxane (PDMS), which is a translucent elastomer. The main body of the soft sensors consists of three layers of silicone rubber plate, and the sensing element is a microchannel filled with gallium-indium-tin (Ga-In-Sn) alloy, which is embedded in the elastomer. First, the working principle of soft sensors is investigated, and their structure is designed. Second, the relationship between curvature and resistance is determined. Third, several sensors with different specifications are built in accordance with the structural design. Experiments show that the sensors exhibit high accuracy when the curvature changes within a certain range. Lastly, the soft sensors are applied to the measurement of mechanical finger bending. Experiments show that soft curvature sensors can effectively reflect mechanical finger bending and can be used to measure the bending of mechanical fingers with high sensitivity within a certain working range.

关键词： soft sensor Ga-In-Sn alloy strain sensing curvature sensing mechanical finger bending

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Autonomous and Mobile Prototype of curvature Sensor with Remote Reliable Communication of Spectral curvature

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Journal of Sensor Technology 2016年第4期6卷 159-179页

作者： Francisco Bulnes Isaías Martínez Rocio Cayetano Omar Zamudio Cuauhtémoc Gutierrez Isaí Martínez Research Department in Mathematics and Engineering TESCHA Federal HighwayMexico-Cuautla Tlapala “La Candelaria” Chalco Mexico Electronic Engineering Division TESCHA Federal Highway Mexico-Cuautla Tlapala “La Cande-laria” Chalco Mexico Informatics Engineering Division TESCHA Federal Highway Mexico-Cuautla Tlapala “La Can-delar-ia” Chalco Mexico Electronics and Electrical Engineering Department Technological Institute of Querétaro Santiago De Queretaro Mexico

Through the creation and construction of a curvature sensor of accelerometer type, using the spectral curvature concept or curvature energy that measures curvature in Volts/m3, an autonomous and mobile censorship of curvature sensing with reliable data transmission/reception in real time and remote position is designed and constructed considering the spectra of curvature of the measured curvature energy during the advance of the prototype as the normed measure by with β , a constant rationalized parameter according with the required advance of the mobile device in the control scale of their velocity. Likewise, the sensed curvature data are digitalized through wireless interconnectivity using a HC-05 Module with a programmable device that includes logic blocks whose interconnection and functionality can be configured according to the sensor measure in situs. Also an application is planted to the obtaining of an energy plus due to the curvature that could be used in the displacement of a vehicle.

关键词： Censorship curvature Energy curvature sensing curvature Sensor curvature Spectra Mobile curvature Sensor Reliable Data Transmission/Reception

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