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advanced sensor systems and applications xiv 2024

ISBN: (纸本)9781510682146

The proceedings contain 26 papers. The topics discussed include: identification of age markers from the structural features of Baltic amber using SERS;ultrasensitive fiber temperature sensor based on Fabry Perot interferometer and vernier effect;resonant optical gyroscopes based on low-coherence radiation sources;in-situ state characterization monitoring of 18650 lithium-ion batteries with high-rate charge and discharge based on the high-stability fiber-optic sensor;time delay estimation accuracy enhancement with envelope filtering in LFM-DAS;ring confocal cavity with gradient lens as sensitive element for the passive optical gyro;arrangement optimization of fiber Bragg grating temperature sensor network for wafer surface temperature field reconstruction with grey wolf optimization-kriging algorithm based on k-medoids;and a novel leakage sensing system of hydrogen transportation pipeline based on hybrid UWFBG array.

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Resonant optical gyroscopes based on low-coherence radiation sources 14

Resonant optical gyroscopes based on low-coherence radiation...

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advanced sensor systems and applications xiv 2024

作者： Filatov, Yu.V. Shalymov, E.V. Venediktov, Vladimir Yu. Iureva, E.K. Laser Measurement and Navigation Systems Department Saint Petersburg Electrotechnical University LETI St. Petersburg197022 Russia

ISBN: (纸本)9781510682146

The paper is devoted to the analysis and review of optical resonance gyroscopes on low-coherence radiation sources. The main advantages of using low-coherence radiation sources in optical resonance gyroscopes are considered. The circuit design options for their implementation developed to date, their operating principle, achieved characteristics, common problems of such gyroscopes and methods for solving them are analyzed. © 2024 SPIE.

关键词： Gyroscopes

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Recent developments of in-situ process and in-line quality monitoring in injection molding using intelligent sensors

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sensorS AND ACTUATORS A-PHYSICAL 2025年 383卷

作者： Shin, Sanghun Baek, Keuntae Oh, Jaemin Kim, Yeon Bin Kim, Myong Dok So, Hongyun Hanyang Univ Dept Mech Engn Seoul 04763 South Korea LG Elect HS Met Plast Forming & Proc Technol Project Chang Won 51533 South Korea Hanyang Univ Inst Nano Sci & Technol Seoul 04763 South Korea

advanced sensor-system-integrated injection molding is a promising technology that can overcome long-lasting problems in the injection molding industry, improve product quality, increase productivity, and reduce total losses. Particularly, advanced sensor systems used in injection molding enable a leap forward in injection molding by implementing novel technologies such as in-situ process monitoring, in-line quality monitoring, and process optimization. In this review, state-of-the-art sensor utilization and applications in the injection molding industry are discussed, ranging from additional sensors utilized in sensor-integrated injection molding machines to advanced sensor applications incorporating artificial intelligence in the injection molding industry in the future. The requirements and challenges of advanced sensor systems in the injection molding industry are also highlighted while providing perspectives for future development.

关键词： Injection molding Intelligent sensors Artificial intelligence advanced sensor application

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Ring confocal cavity with gradient lens as sensitive element for the passive optical gyro 14

Ring confocal cavity with gradient lens as sensitive element...

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advanced sensor systems and applications xiv 2024

作者： Filatov, Yu.V. Gorelaya, A.V. Alhasan, H. Iurieva, E.K. Shalymov, E.V. Venediktov, V.Yu. Laser Measurement and Navigation Systems Department Saint Petersburg Electrotechnical University LETI St. Petersburg197376 Russia

ISBN: (纸本)9781510682146

The condition and concept of confocality for ring resonators are considered. The advantages and limitations of such a design and its prospects for application in passive optical gyros are considered. It is also shown that earlier proposed scheme with toroidal reflecting surfaces can be substituted by the ring cavity with the internal axially symmetrical lens (GRIN-lens). © 2024 SPIE.

关键词： Gyroscopes

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Elderly monitoring system based on multi-sensor information fusion 14

Elderly monitoring system based on multi-sensor information ...

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advanced sensor systems and applications xiv 2024

作者： Chen, Yajiang Chen, Shuwang Ma, Yifei School of Information Science and Engineering Hebei University of Science and Technology 26 Yuxiang Street Yuhua District Hebei Province Shijiazhuang City050018 China

ISBN: (纸本)9781510682146

Traditional monitoring systems for older adults typically rely on a single type of sensor, resulting in limited data sources that limit the comprehensiveness and diversity of monitoring. This limitation makes it difficult for the system to effectively and comprehensively identify complex abnormal behaviors, thus failing to provide sufficient data support for decision-making. To address this problem, this study proposes a multi-sensor information fusion-based monitoring system for the elderly. The system employs an advanced fusion algorithm to fuse data from visible, infrared and other sensors. To further improve the accuracy and coverage of the system monitoring, this study introduces a fusion genetic wolf pack algorithm to optimize the sensor layout and ensure the optimal configuration of sensors in the monitoring environment. By combining multi-sensor information fusion with optimal layout, the system not only monitors the multidimensional living environment and physiological state of the elderly more accurately, and provides comprehensive and accurate monitoring of the elderly's daily activities and health status, but also provides a solid data base for the detection and processing of abnormal behaviors. © 2024 SPIE.

关键词： Information fusion

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Liquid-level sensor based on flat-shaped plastic optical fiber assisted by a long-period grating 14

Liquid-level sensor based on flat-shaped plastic optical fib...

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advanced sensor systems and applications xiv 2024

作者： Bao, Haiyang Zheng, Jie Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun130033 China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun130012 China

ISBN: (纸本)9781510682146

A corrugated surface long-period grating (LPG) was imprinted on a flat-shaped plastic optical fiber (POF) as a liquid-level sensor. The flat shape was processed on commercial POF by a simple heat-pressing method, and the LPG was fabricated by a mechanical die-press-print method. The liquid-level sensing performance of the sensor with different structural parameters was evaluated. It was shown that the thinner flat-shaped POF assisted by an LPG exhibits better sensing performance. The LPG with deeper groove depth achieved higher sensitivity, and theoretical calculations were consistent with these results. The highest sensitivity of -0.2332dB/mm was obtained while the flat-shaped POF with a thickness of 500μm, on which was assisted by the LPG with a period of 300μm and a groove depth of 103μm. The results demonstrated that flattening the POF assisted an LPG could improve the liquid-level sensing performance. © 2024 SPIE.

关键词： Plastic optical fibers

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Flexible Neuromorphic Electronics for Wearable Near-sensor and In-sensor Computing systems

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advanced MATERIALS 2025年第9期37卷 e2416073页

作者： Jang, Hyowon Lee, Jihwan Beak, Chang-Jae Biswas, Swarup Lee, Sin-Hyung Kim, Hyeok Univ Seoul Ctr Smart Sensor Syst Seoul CS4 Sch Elect & Comp Engn 163 Seoulsiripdaero Seoul 02504 South Korea Univ Seoul Sch Adv Fus Studies Dept Intelligent Semicond Engn 163 Seoulsiripdaero Seoul 02504 South Korea

Flexible neuromorphic architectures that emulate biological cognitive systems hold great promise for smart wearable electronics. To realize neuro-inspired sensing and computing electronics, artificial sensory neurons that detect and process external stimuli must be integrated with central nervous systems capable of parallel computation. In near-sensor computing, synaptic devices, and sensors are used to emulate sensory neurons and receptors, respectively. In contrast, in in-sensor computing, a single multifunctional device serves as both the receptor and neuron. Bio-inspired cognitive systems efficiently detect and process stimuli through data structuring techniques, significantly reducing data volume and enabling the extension of neuromorphic applications to smart wearable systems. To construct wearable near- and in-sensor computing, it is crucial to develop artificial sensory neurons and central nervous synapses that replicate the biological functionalities. Additionally, the integrated systems must exhibit high mechanical flexibility and integration density. This review addresses research on flexible bio-inspired cognitive systems, classified into near- and in-sensor computing. It covers fundamental aspects, including biological cognitive processes, the required components, and the structures for each component, as well as applications for wearable smart systems. Finally, it offers perspectives on future research directions for flexible neuromorphic electronics in smart wearable systems connected to the next-generation Internet of Things.

关键词： flexible synaptic device in-sensor computing near-sensor computing sensory neuron smart wearable electronics

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Mach-Zehnder interferometer sensor based on tapered DCF for measuring axial strain, bending and magnetic field 14

Mach-Zehnder interferometer sensor based on tapered DCF for ...

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advanced sensor systems and applications xiv 2024

作者： Huang, Huiling Gao, Ling Jiang, Chao Zhang, Han Yan, Tianqi Guo, Zihao Han, Bowen Guo, Xiaoshan Sun, Simei Hubei Key Laboratory of Optoelectronic Conversion Materials and Devices Hubei Engineering Research Center for Micronano Optoelectronic Devices and Integration College of Physics and Electronic Science Hubei Normal University Hubei Huangshi435002 China

ISBN: (纸本)9781510682146

A fiber optic Mach-Zehnder interferometer (MZI) sensor with sensitivity to strain, magnetic field, and bending was designed by splicing single-mode fiber (SMF) and dispersion compensation fiber (DCF). MZI is a sandwich structure of "SMF - tapered DCF - SMF". MZI1 and MZI2 are prepared by pulling DCF to different lengths using a fiber optic fusion tapering machine respectively. MZI1 with tapered structure is quite sensitive to axial strain, and the experimentally obtained axial strain sensitivity is -21.6 pm/μϵ. Then, sticking MZI1 and magnetostrictive material together can form a magnetic field sensor. The experiment found that within the range of 15 mT to 140 mT, there is an excellent parabolic fitting relationship between the dip wavelength of MZI1 spectrum and magnetic field intensity, with a fitting coefficient of 0.9997. The curvature of the bending was measured using MZI2, achieving a sensitivity of 10.1 nm/m-1 and a linearity of 0.9906. © 2024 SPIE.

关键词： Mach-Zehnder interferometers

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Arrangement optimization of fiber Bragg grating temperature sensor network for wafer surface temperature field reconstruction with grey wolf optimization-Kriging algorithm based on K-medoids 14

Arrangement optimization of fiber Bragg grating temperature ...

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advanced sensor systems and applications xiv 2024

作者： Feng, Yuhao Wu, Tao Meng, Xiangze Peng, Jingjing Xing, Fei Sun, Ting School of Instrument Science and Opto-Electronics Engineering Beijing Information Science and Technology University Beijing100192 China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing100084 China

ISBN: (纸本)9781510682146

Temperature is a significant control parameter in the silicon-based MEMS fabrication process, and the uneven distribution of the temperature on the surface of a silicon wafer can have a huge impact on the entire process. In this study, an FBG temperature sensing network was used to monitor temperature trends and abnormal temperature regions during the manufacturing process. The measurement of wafer surface temperature using FBG arrays often only records limited spatio-temporal temperature data, rather than the temperature distribution across the entire surface. Therefore, a reconstruction algorithm is needed to reconstruct the temperature field on the wafer surface. In order to find the optimal FBG sensor arrangement while improving the reconstruction accuracy of the wafer surface temperature field, this paper discusses the influence of the number of sensors and the sensors' placement. COMSOL is used to simulate the process of wafer heating. Sparse temperature data are obtained by numerical calculations to reconstruct the temperature field with both linear and fan-shaped sensor position arrangements. The RMSE between the temperature field obtained by the optimized layout and the simulation results is smaller than 2.5°. The FBG network layout proposed in this paper can provide an application basis for temperature field reconstruction in the MEMS manufacturing process. © 2024 SPIE.

关键词： Silicon wafers

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Ultrasensitive fiber temperature sensor based on Fabry Perot interferometer and Vernier effect 14

Ultrasensitive fiber temperature sensor based on Fabry Perot...

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advanced sensor systems and applications xiv 2024

作者： Sun, Simei Huang, Jing Huang, Mingyue Yan, Huaqian Yang, Haoyue Tang, Dihua Cao, Shuang Jiang, Wenbo Chen, Fulin Jiang, Chao Hubei Key Laboratory of Optoelectronic Conversion Materials and Devices Hubei Engineering Research Center for Micronano Optoelectronic Devices and Integration College of Physics and Electronic Science Hubei Normal University Hubei Huangshi435002 China

ISBN: (纸本)9781510682146

Temperature is undoubtedly one of the most important parameters in human life, production, and technological activities, and plays a crucial role in both daily life and industrial production. Fiber temperature sensors, with their advantages of small size, fast response, high sensitivity, and so on, have been widely studied and used. Ultrasensitive fiber temperature sensor based on the Fabry Perot interferometer (FPI) and vernier effect has been composed. Single mode fiber (SMF), polydimethylsiloxane (PDMS), and capillary have been used to fabricate two FPIs. The sensor was cascaded by a sensing FPI (FPIs), a "SMF-PDMS-SMF"cavity with FSR of 6.27 nm, and a reference FPI (FPIr), a "SMF-capillary-SMF"cavity with FSR of 6.47 nm. Temperature measurements have been performed on both individual sensing FPIs and cascaded sensor, and it is found that they both have excellent linear response with linearity of more than 0.998. The sensitivity of the single sensing FPI is 1.037 nm/°C;The temperature sensitivity of the sensor based on the cursor effect is 32.39 nm/°C, with an amplification factor of 31.58, which is very close to the theoretical M-factor. This ultrasensitive temperature sensor can meet the demand for high-precision temperature measurement. © 2024 SPIE.

关键词： Fabry-Perot interferometers

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