Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics最新文献_第8页

Piezoelectric metamaterial with self-tuning resonant shunt circuits 具有自调谐谐振分流电路的压电超材料

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2657612

Yu Jian, Yincheng Shen, Lihua Tang, Guobiao Hu, K. Aw

{"title":"Piezoelectric metamaterial with self-tuning resonant shunt circuits","authors":"Yu Jian, Yincheng Shen, Lihua Tang, Guobiao Hu, K. Aw","doi":"10.1117/12.2657612","DOIUrl":"https://doi.org/10.1117/12.2657612","url":null,"abstract":"The bandgap generated in piezoelectric metamaterials with resonant shunt circuits unveils a great potential for vibration control. This paper presents a piezoelectric metamaterial with the capability of broadband vibration attenuation by adaptive bandgap tuning. Unlike the widely used synthetic impedance circuit, a self-tuning resonant shunt circuit by integrating a microcontroller-driven digital potentiometer into the synthetic inductor circuit is developed to achieve the bandgap adjustment of the piezoelectric metamaterial. Specifically, the excitation frequency is detected by the microcontroller, and the synthetic inductance in the resonant shunt circuit is adjusted in real-time based on a given criterion. An experimental study is conducted to demonstrate the dynamic behavior and vibration suppression performance of the developed piezoelectric metamaterial. The results confirm that the self-tuning resonant shunt circuit can rapidly respond to frequency-varying vibration sources and endow the piezoelectric metamaterial with an extremely wide vibration attenuation region.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"17 1","pages":"124831F - 124831F-7"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83912599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Traveling wave characteristics on two-dimensional finite structures using Hilbert transform 利用希尔伯特变换的二维有限结构行波特性

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2657425

Meng-Han Yang, Y. Hsu, Chih-Kung Lee

引用次数: 0

Morphologically intelligent dielectric elastomer sensors based on micro-structured electrodes as resistive strain elements 基于微结构电极作为电阻应变元件的形态智能介电弹性体传感器

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2658920

S. Martin, S. Reitelshöfer, J. Franke

{"title":"Morphologically intelligent dielectric elastomer sensors based on micro-structured electrodes as resistive strain elements","authors":"S. Martin, S. Reitelshöfer, J. Franke","doi":"10.1117/12.2658920","DOIUrl":"https://doi.org/10.1117/12.2658920","url":null,"abstract":"Dielectric elastomer sensors (DES) are compliant systems that, allow the detection of geometric changes caused by external forces. However, a simple DES provides only the amplitude of a deformation. In order to fully describe a tensile force vector, it is necessary to characterize it by its length, direction, and origin. Therefore, there are many approaches to improve the information that can be obtained from the sensor, such as arranging DES patterns or modifying the impact of the applied mechanical force by using external components. To improve and parallelize the information provided by the mechanical deformation of the system, we aim to combine the operation principle of structured resistive strain sensors with the capacitive properties of DES. By structuring the electrodes with different patterns and combining two dissimilar electrodes in one setup, it is possible to detect the length and direction of a force vector with one sensing element. To study the patterning and its effect on resistive and capacitive signals, we use an aerosol jet printing technique that allows selective deposition of a conductive ink. The printed lines show a higher resistance increase when forced perpendicular to the pattern and vice versa, which allows to distinguish the direction and the type of applied force. In this study, the influence of printing parameters and signal interpretation for different forces are investigated. The results show that the combination of resistive and capacitive signals allows discrimination between different motions.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"24 1","pages":"124820Y - 124820Y-6"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90509412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and control of conducting polymer based tri-layer transducer 导电聚合物三层换能器的建模与控制

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2657953

S. Ghenna, S. Grondel, É. Cattan

引用次数: 0

A bio-inspired multi-directional HASEL actuator-driven soft robotic tail: design and characterization 仿生多方向HASEL驱动器驱动的软机器人尾巴:设计和表征

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2656884

Revanth Konda, Erik Hartman, Jun Zhang

{"title":"A bio-inspired multi-directional HASEL actuator-driven soft robotic tail: design and characterization","authors":"Revanth Konda, Erik Hartman, Jun Zhang","doi":"10.1117/12.2656884","DOIUrl":"https://doi.org/10.1117/12.2656884","url":null,"abstract":"As a recently invented soft actuator, hydraulically amplified self-healing electrostatic (HASEL) actuators have exhibited strong potential for employment in soft and biomimetic robots. HASEL actuators rely on the principle of hydraulics and electrostatic forces to generate motion. Many existing HASEL actuator-driven robots only exhibit one degree-of-freedom (DoF) motion. The few existing designs that generate multi-DoF motion are often bulky and use multiple stacks of HASEL pouches. In this paper, a bio-inspired robotic tail powered by HASEL actuators is presented. The tail is a popular structure considered for bioinspiration, due to its ability to exhibit fluidic multi-DOF motion while being compliant. While HASEL actuators-driven tails have been developed in the past, very few of them exhibit multi-DOF complex motion, which is a critical aspect of a tail. The proposed robotic tail utilized compact multi-directional HASEL actuators that used two inputs to achieve motion in three-dimensional space. The transient and steady state voltage–deflection angle correlations of the rightward, leftward, and upward curls of the robotic tail under different loading conditions were experimentally characterized. Furthermore, a lifecycle test was conducted at multiple inputs. Satisfactory performance was obtained. For example, the robotic tail could generate 169.8◦ side-ward deflection and 262.7◦ upward deflection when no loads were applied.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"35 1","pages":"124820M - 124820M-10"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79964254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TouchBand: a modular low-power elastomer-based watchband for touch input and hand gesture recognition TouchBand:一个模块化的低功耗弹性体表带，用于触摸输入和手势识别

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2658198

Jiang Gao, Yiting Wu, Xiulun Yin, Ziqiang Chen, Kieran Morton, J. Madden

{"title":"TouchBand: a modular low-power elastomer-based watchband for touch input and hand gesture recognition","authors":"Jiang Gao, Yiting Wu, Xiulun Yin, Ziqiang Chen, Kieran Morton, J. Madden","doi":"10.1117/12.2658198","DOIUrl":"https://doi.org/10.1117/12.2658198","url":null,"abstract":"Existing smartwatches offer convenient health monitoring and interfaces with mobile devices. However, the interactivity between a user and a smartwatch suffers from the limited size of the screen and buttons. To improve the usability of smartwatches, novel human-computer interaction methods are introduced into the watchband. To this end, we present a modular lightweight watchband consisting of various capacitive sensing modules—TouchBand. It is made with a flexible printed circuit board (PCB) supporting the bottom electrodes, silver-coated conductive fabric as the top electrodes, and Eco-Flex as the dielectric to electrically separate the PCB and fabric. The watchband incorporates three control modules—(i) two shear-sensitive pressure sensing buttons, (ii) two capacitive sliders, and (iii) one proximity sensing array for hand gesture recognition. Shear forces are captured by analyzing the asymmetric changes in multiple mutual-capacitance readings produced by a shear motion between the top and bottom layers, where overlapped electrodes reside. Sliders pick up changes in proximity as fingers are moved across the sensor surfaces. Hand gestures could be recognized by monitoring the capacitance-based proximity readings between the watchband electrodes and the user’s skin. Eyes-free input to the watch becomes feasible by providing a shear/sliding touch input to the watchband as well as performing a free-hand gesture on the wearing hand. With a flexible printed circuit (FPC) connection to the compact custom electronics, all modules of the watchband were sampled at 50 Hz while consuming 30 mW of power. Meanwhile, the measurement data was wirelessly transmitted through Bluetooth Low-Energy 5.0 (BLE) to a nearby mobile device for real-time data analysis and visualization.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"51 1","pages":"1248202 - 1248202-10"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76808975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental assessment to evaluate adhesion in hybrid composite structures containing shape memory alloy layers 含有形状记忆合金层的混杂复合材料结构附着力的实验评估

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2658416

Dusan Milosavljevic, N. Lecis, S. Cinquemani

引用次数: 0

A Terahertz time-domain spectroscopy-based intelligent microwave vacuum dehydration system for in-situ monitoring of real-time moisture migration during dehydration of agricultural products 基于太赫兹时域光谱的智能微波真空脱水系统用于农产品脱水过程中水分迁移的实时现场监测

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2662781

Yuqiao Ren, Da‐Wen Sun

{"title":"A Terahertz time-domain spectroscopy-based intelligent microwave vacuum dehydration system for in-situ monitoring of real-time moisture migration during dehydration of agricultural products","authors":"Yuqiao Ren, Da‐Wen Sun","doi":"10.1117/12.2662781","DOIUrl":"https://doi.org/10.1117/12.2662781","url":null,"abstract":"Microwave vacuum drying (MVD) as a novel and advanced drying technology is wildly applied in the agri-food, pharmaceutical, and electronics industry, etc. However, achieving in-situ analyses of the realtime moisture content (MC) of products during MVD is still a huge challenge. This research aims to build an intelligent dehydration system by integrating a Terahertz time-domain spectroscopy (THz- TDS) into an MVD system to achieve in-situ monitoring of real-time moisture content (MC) in agrifood products. During dehydration, the THz-TDS continuality captured the spectra from a polyethene (PE) air hose containing the exhaust water vapor from the glass desiccator. Chemometric analysis of Gaussian process regression was applied to correlate the real-time MC loss of products with the corresponding numerical integration of THz absorption coefficients of vapor. The real-time MC content was accurately calculated based on the prediction. The result shows that the THz-TDS is able to sense the dynamic vapor changes within the MVD system by penetrating the PE air hose, and the established intelligent dehydration system combined with chemometric analyses achieved a satisfied MC loss and MC prediction, with R2 of 0.95 and 0.98, and RMSE of 0.002 and 0.031, respectively. The THz-TDS technique shows great potential to be integrated into an MVD system to achieve in-situ real-time MC evaluation, optimize dehydration condition, and predict the dehydration endpoint. The established intelligent dehydration system also provides a novel sensing strategy using THz-TDS to monitor the gas exchange within a closed system by penetrating a PE air hose in the system, and further widen the application of THz-TDS in the agri-food industry.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"11 1","pages":"124830Q - 124830Q-7"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72798990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental characterization of actuation of anion-exchange membranes in salt solution 盐溶液中阴离子交换膜驱动的实验表征

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2658447

Nicco Ulbricht, A. Boldini, Chulsung Bae, T. Wallmersperger, M. Porfiri

{"title":"Experimental characterization of actuation of anion-exchange membranes in salt solution","authors":"Nicco Ulbricht, A. Boldini, Chulsung Bae, T. Wallmersperger, M. Porfiri","doi":"10.1117/12.2658447","DOIUrl":"https://doi.org/10.1117/12.2658447","url":null,"abstract":"Besides their use in separation and filtration processes, ion-exchange membranes have been adopted as electroactive polymer actuators in soft robotics and biomedical engineering, due to their unique coupling between electrochemistry and mechanics. Actuation is generated by the asymmetry in cations and anions transport, as one of the two species is bonded to the membrane backbone, whereas the other can move throughout the membrane. Typically, electrodes are plated on the membrane to enable application of an external electric field. A new, promising contactless actuation configuration for underwater applications consists of immersing a bare membrane in an electrolyte solution, between external electrodes. When an electric field is imposed across the electrodes, a macroscopic bending deformation is observed. Despite major advances in understanding the actuation of cation-exchange membranes (with fixed anions), the actuation of anion-exchange membranes (with fixed cations) is an almost untapped field. In this work, we experimentally investigate the contactless actuation of anion-exchange membranes. In the experiments, we systematically vary the anions in the external solution and inside the membrane, to unravel their effects on membrane actuation. In all tested combinations, the membrane always bends in the opposite direction compared to cation-exchange membranes. Additionally, we find a prominent influence of the external anions on the actuation strength, consistent with previous theories that attribute actuation to solvation effects. Our results help shade light on the chemoelectromechanics of anion-exchange membranes, toward their increase adoption as soft actuators.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"22 1","pages":"124820K - 124820K-6"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82816765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A self-sensing approach for multi-mode dielectric elastomer actuator-loudspeaker devices 多模介电弹性体致动器-扬声器装置的自传感方法

Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics Pub Date : 2023-04-28 DOI: 10.1117/12.2657884

S. Gratz-Kelly, T. Krüger, Stefan Seelecke, G. Rizzello, G. Moretti

{"title":"A self-sensing approach for multi-mode dielectric elastomer actuator-loudspeaker devices","authors":"S. Gratz-Kelly, T. Krüger, Stefan Seelecke, G. Rizzello, G. Moretti","doi":"10.1117/12.2657884","DOIUrl":"https://doi.org/10.1117/12.2657884","url":null,"abstract":"In recent works, we proved that some dielectric elastomer (DE) actuator topologies, normally used as linear actuators at low frequencies (LFs), can produce sound taking advantage of high-frequency (HF) structural vibrations of the DE membrane surface. Because structural vibrations take place along different deformation directions compared to those involved in LF actuation, these DE actuators (DEAs) can generate sound even when their LF pumping motion is constrained, or while they are driven to produce a concurrent LF pumping motion. This observation can be used to develop acoustic buttons, which produce sound while being deformed by a user, or multi-function audio-tactile interfaces, which provide combined HF acoustic and LF tactile feedbacks through multi-chromatic voltage inputs. In this paper, we propose a self-sensing approach to estimate LF deformations of multi-function DEAs. In contrast with traditional self-sensing approaches, in which an additional sensing signal is superimposed to the main driving signal, here we solely rely on the HF acoustic voltage input, which we also use as the sensing signal. We prove that self-sensing of LF deformations can be achieved even in the presence of complex HF driving signals, such as soundtracks. This allows reconstructing LF deformations induced either by a LF voltage excitation (superimposed to the driving acoustic signal), or by variable external forces (e.g., user touches, such as in user interfaces). In the future, this self-sensing approach might be used to build multi-functional sound interfaces that adapt their output based on a user-driven deformation, or for virtual reality rendering applications.","PeriodicalId":89272,"journal":{"name":"Smart structures and materials. Nondestructive evaluation for health monitoring and diagnostics","volume":"1 1","pages":"1248204 - 1248204-11"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77182783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0