Sensors and Actuators A-physical最新文献_第3页

Monitoring of the resin flow front within a resin transfer moulding during fabrication using fibre Bragg gratings 在制造过程中使用光纤布拉格光栅监测树脂转移模塑中的树脂流动前沿

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-08 DOI: 10.1016/j.sna.2025.116681

T. Allsop , W.M. Tahir , K. Bhavsar , L. Zhang

{"title":"Monitoring of the resin flow front within a resin transfer moulding during fabrication using fibre Bragg gratings","authors":"T. Allsop , W.M. Tahir , K. Bhavsar , L. Zhang","doi":"10.1016/j.sna.2025.116681","DOIUrl":"10.1016/j.sna.2025.116681","url":null,"abstract":"<div><div>Composite structures are becoming significantly larger. Discarding these large structures due to manufacturing defects is unacceptable due to cost, time, and environmental concerns. To mitigate the risk of defects, real-time monitoring of resin flow during infusion is needed to ensure complete wetting of glass mats. However, current studies lack real-time flow-front monitoring, relying instead on manual post-production checks, and may result in costly repairs or disposal of defective parts. Fibre Bragg grating sensors have been shown to spectrally respond to resin during infusion, but the physical mechanism behind this response—crucial for interpreting flow front location and direction—has not been investigated. For the first time we report an in-depth study of fibre Bragg grating sensors for real-time monitoring of the flow front of liquids in the resin transfer moulding (RTM) infusion process and the mechanisms that produce the spectral response based upon the viscous force generated by the liquid and its flow-front. We present experimental wavelength shift data of the fibre Bragg grating sensors during infusion to show that viscous force is the dominant mechanism. Furthermore, we created a model that shows good agreement with experimental data, the model predicts wavelength shifts of the sensors at different locations to the approaching flow-front. Current model can aid numerical simulations of the infusion process to ensure complete impregnation of glass reinforcement mats.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116681"},"PeriodicalIF":4.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-performance NH3 gas detection at room temperature using α-Fe2O3/TiO2 heterojunction with nanorod-supported film structure 采用纳米棒支撑膜结构的α-Fe2O3/TiO2异质结在室温下进行高性能NH3气体检测

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-08 DOI: 10.1016/j.sna.2025.116675

Kai Ou, Xinrong Li, Ting Liu, Zhenzhen Liu, Yuxiang Ni, Yongliang Tang, Yudong Xia, Hongyan Wang

{"title":"High-performance NH3 gas detection at room temperature using α-Fe2O3/TiO2 heterojunction with nanorod-supported film structure","authors":"Kai Ou, Xinrong Li, Ting Liu, Zhenzhen Liu, Yuxiang Ni, Yongliang Tang, Yudong Xia, Hongyan Wang","doi":"10.1016/j.sna.2025.116675","DOIUrl":"10.1016/j.sna.2025.116675","url":null,"abstract":"<div><div>Metal oxides are extensively utilized in gas sensors due to their exceptional sensing characteristics, thermal stability, and abundance. However, achieving high sensitivity and selectivity at room temperature (RT. 25℃) remains a significant challenge. This study presents an NH<sub>3</sub> sensor featuring a nanorod-supported film structure of α-Fe<sub>2</sub>O<sub>3</sub>/TiO<sub>2</sub> n-n heterojunction, fabricated through the glancing angle deposition (GLAD) technique. The sensor demonstrated remarkable selectivity and high sensitivity to NH<sub>3</sub> at RT, with an optimal device structure yielding a response value of about 24.7 at 20 ppm. Notably, the device exhibited excellent stability, showing only minimal degradation in response after 10 days of exposure to ambient air. A detailed analysis of the device structure and sensing mechanism underscores the advantages of this approach. These findings highlight the significant potential of the GLAD technique for fabricating nanorod-based structures for RT gas sensing applications.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116675"},"PeriodicalIF":4.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile fabrication of flexible PDDA@PANI/PVDF humidity sensor and applications for non-contact monitoring 柔性PDDA@PANI/PVDF湿度传感器的简易制造及非接触式监测应用

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-08 DOI: 10.1016/j.sna.2025.116674

Jintian Qian , Mingxia Feng , Dawu Lv , Ruiqin Tan , Wenfeng Shen , Weijie Song

{"title":"Facile fabrication of flexible PDDA@PANI/PVDF humidity sensor and applications for non-contact monitoring","authors":"Jintian Qian , Mingxia Feng , Dawu Lv , Ruiqin Tan , Wenfeng Shen , Weijie Song","doi":"10.1016/j.sna.2025.116674","DOIUrl":"10.1016/j.sna.2025.116674","url":null,"abstract":"<div><div>Flexible humidity sensors play a crucial role in the real-time monitoring of human physiological activities by being integrated with smart terminals, compact medical devices and flexible electronic skins. In this work, a facile fabrication method of a flexible humidity sensor based on a composite material of poly(diallyldimethylammonium chloride) (PDDA) and polyaniline (PANI) using in-situ polymerization and dip-coating techniques was proposed on a microporous poly(vinylidene fluoride) (PVDF) filter membrane substrate. The resulting PDDA@PANI/PVDF-3.50 % sensor demonstrates remarkable sensitivity with a response of up to 5249 % across a humidity range of 11–97 % relative humidity (RH), minimal hysteresis (∼1.2 %), rapid response and recovery times (11 s and 28 s), stable performance under mechanical deformation, and excellent long-term durability. Additionally, the sensor can readily identify three breathing states and detect finger movements as short as 1 mm. The excellent performance is attributed to the hydrophilic modification and synergistic effect of PDDA on PANI chain, and the rich microporous structure of PVDF membrane. This work offers a novel strategy for developing advanced flexible sensors with significant potential in wearable electronic devices for healthcare and human-computer interaction.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116674"},"PeriodicalIF":4.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","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-powered smart woundplast for real-time monitoring and on-demand treatment of wound infection 一种自供电的智能创面贴，用于实时监测和按需治疗伤口感染

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-08 DOI: 10.1016/j.sna.2025.116676

Zhonglin Liu , Ruijie Chen , Rui Lin, Xianchun Jin, Shan Liang, Xinyu Xue, Zhihe Long, Lili Xing

{"title":"A self-powered smart woundplast for real-time monitoring and on-demand treatment of wound infection","authors":"Zhonglin Liu , Ruijie Chen , Rui Lin, Xianchun Jin, Shan Liang, Xinyu Xue, Zhihe Long, Lili Xing","doi":"10.1016/j.sna.2025.116676","DOIUrl":"10.1016/j.sna.2025.116676","url":null,"abstract":"<div><div>It is very important for the skin injury to realize real-time detection and on-demand treatment of infected wounds. In this study, we develop a self-powered smart woundplast integrating infection monitoring with on-demand drug delivery. The smart woundplast comprises a power supply unit that can harvest mechanical energy from the wearer and convert it into electricity. A temperature measurement unit, consisting of a skin thermometer and a wound thermometer, evaluates wound infection in real time by detecting temperature. A data processing module continuously analyzes temperature data and drives drug release when wound infection is detected. A drug delivery unit employs a three-electrode structure to achieve uniform drug release through iontophoresis. After wearing the smart woundplast for 3 minutes, the temperature difference between the wound and surrounding skin of infected mice is detected to be approximately 1.8°C, whereas that is about 1°C in uninfected mice. After 10 minutes, the amoxicillin concentration in the wound tissue of infected mice is more than twice that of uninfected mice. These results confirm the realization of real-time monitoring and on-demand treatment. After three days of treatment with the smart woundplast, the average wound healing rate of infected mice reaches 91.6 %, surpassing the blank control group by 60.9 %, confirming the smart woundplast exhibits excellent therapeutic efficacy. This smart woundplast presents a novel concept of intelligent treatment of infected wounds combined with self-powered technology.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116676"},"PeriodicalIF":4.1,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activation and characterization of Rb MEMS cells with an automatic system at wafer level Rb MEMS晶圆级自动系统的激活与表征

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-07 DOI: 10.1016/j.sna.2025.116621

M. Gozzelino , E. Cerrato , C. Gionco , S. Micalizio , G. Aprile , M. Crivellari , F. Levi , D. Calonico

引用次数: 0

A novel pull-out semi-dry electrode with rapid conductive liquid replenishment for EEG acquisition in real driving environment 一种可快速补充导电液的拉出式半干电极，用于真实驾驶环境下的脑电采集

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-06 DOI: 10.1016/j.sna.2025.116671

Wanchao Yao , Tianshu Gu , Rongrong Fu , Fuwang Wang

{"title":"A novel pull-out semi-dry electrode with rapid conductive liquid replenishment for EEG acquisition in real driving environment","authors":"Wanchao Yao , Tianshu Gu , Rongrong Fu , Fuwang Wang","doi":"10.1016/j.sna.2025.116671","DOIUrl":"10.1016/j.sna.2025.116671","url":null,"abstract":"<div><div>To address the issues of convenience, comfort, and noise resistance in the detection of driving fatigue in real driving environments, this study developed a novel pull-out semi-dry electrode and constructed a driving fatigue recognition model using a one-dimensional deep residual shrinkage network (1D-DRSN). The novel electrode features a spring reset structure for rapid conductive liquid replenishment, combined with silver-plated electrode cores and PU sponge, ensuring high signal quality and comfortable wear. The 1D-DRSN model integrates residual connections, attention mechanisms, and soft threshold functions to effectively reduce noise interference, demonstrating high accuracy and robustness. Results show that the novel electrode can achieve up to 10 hours of effective electroencephalography (EEG) signal acquisition, and the 1D-DRSN model achieves an average classification accuracy rate of 99.65 % in driving fatigue detection tasks, maintaining excellent performance even in noisy environments. This study provides an efficient and reliable solution for signal acquisition and detection in the field of driving fatigue detection.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116671"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selective sensing of triethylamine (TEA) using Zn2SnO4-SnO2 nanocomposites under UV irradiation at room temperature 室温紫外光照射下zno - sno4 - sno2纳米复合材料对三乙胺（TEA）的选择性传感

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-06 DOI: 10.1016/j.sna.2025.116655

Fatemeh Bagheri, Hamid Haratizadeh, Sahar Afzali

{"title":"Selective sensing of triethylamine (TEA) using Zn2SnO4-SnO2 nanocomposites under UV irradiation at room temperature","authors":"Fatemeh Bagheri, Hamid Haratizadeh, Sahar Afzali","doi":"10.1016/j.sna.2025.116655","DOIUrl":"10.1016/j.sna.2025.116655","url":null,"abstract":"<div><div>Conventional chemoresistive gas sensors frequently demonstrate limitations in terms of selectivity and require operation at elevated temperatures. Addressing these aforementioned challenges associated with conventional gas sensors can be achieved by utilizing nanocomposite materials and employing ultraviolet activation rather than thermal activation. In this study, a gas sensor based on UV-activated Zn<sub>2</sub>SnO<sub>4</sub>-SnO<sub>2</sub> has been developed. The synthesized Zn<sub>2</sub>SnO<sub>4</sub>-SnO<sub>2</sub> composite was characterized using a variety of analytical techniques, including X-ray diffraction, field emission scanning electron microscopy, X-ray spectroscopy, Raman spectroscopy, and photoluminescence. The fabricated Zn<sub>2</sub>SnO<sub>4</sub>-SnO<sub>2</sub> sensor exhibited its capability for effective triethylamine detection at low concentrations (1–75 ppm) at ambient temperature conditions. Gas-sensing performance evaluations revealed exceptional selectivity for triethylamine, with a response 10–140 times greater compared to the responses to other volatile organic compounds, including ethanol, methanol, acetone, ammonia, isopropyl alcohol, and toluene. The sensor demonstrated a fast response/recovery time of 4/20 s when exposed to 75 ppm of triethylamine. The sensor's linear calibration curve, stability, and repeatability further substantiate its potential for utilization in real-world applications.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116655"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser-patterned gold-leaf/WPU conductive films for flexible electronics 柔性电子用激光图纹金箔/WPU导电薄膜

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-06 DOI: 10.1016/j.sna.2025.116661

Bin Sheng , Jingyu Zhou , Ziqi Wen , Lei Tang , Dawei Zhang

{"title":"Laser-patterned gold-leaf/WPU conductive films for flexible electronics","authors":"Bin Sheng , Jingyu Zhou , Ziqi Wen , Lei Tang , Dawei Zhang","doi":"10.1016/j.sna.2025.116661","DOIUrl":"10.1016/j.sna.2025.116661","url":null,"abstract":"<div><div>Gold is typically used as conductive layers in wearable electronics because of their good conductivity and chemical stability; however, the weak adhesion between gold films and flexible substrates is a persistent engineering issue. In this report, we introduce a convenient and unique process for preparing flexible conductive films compounded with traditional gold leaf of 110-nm thickness and waterborne polyurethane (WPU) film, which meet the highest ASTM class standard of 5B and has excellent adhesion strength (not less than 440 N/m) between the gold leaf and the WPU film. The resulting gold-leaf/WPU conductive film (GWCF) exhibits excellent conductivity (1.14 ×10<sup>7</sup> S/m) and a sheet resistance of 0.8Ω/sq and a 50 % stretchable working range, GF (61.3). The average adhesion strength of the gold leaf on the WPU film (prepared via in-situ polymerization) was 1257 ± 50 N/m. The sensor withstood 2000 finger frictions and 500 contact frictions, maintaining stable resistance without significant changes, and was successfully developed into strain sensors for gesture recognition. Furthermore, rear-side laser ablation method was used for high-precision patterning of gold leaf (with minimum line width of 50 µm and minimum line pitch of 25 µm), resulting various flexible electrodes of shapes. The flexible humidity sensor with interdigital electrode of GWCF and graphene oxide shows high sensitivity, repeatability, and stability under bending; and GWCF-based flexible circuits offer high transparency, waterproofing, and stable deformation, with applications in wearables and fabric-integrated LED circuits. Additionally, a flexible smart remote controller using GWCF was developed for omnidirectional control of a smart vehicle via Bluetooth, enhancing human-machine interaction. In summary, this study presents an easy and cost-effective approach to fabricating flexible gold electrodes with great potential for flexible electronics applications.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116661"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Retraction notice to ‘Rock drilling performance of rotary ultrasonic tools incorporating PZT piezoceramic and Mn: PIN-PMN-PT piezocrystal’ [Sens. Actuators A: Phys. 364 (2023) 114849] “结合PZT压电陶瓷和Mn: PIN-PMN-PT压电晶体的旋转超声工具的岩石钻井性能”的撤回通知[j] .传感器，执行器，364(2023):114849。

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-06 DOI: 10.1016/j.sna.2025.116654

Xuan Li, Patrick Harkness

引用次数: 0

Integrated design and manufacturing of wearable capacitive sensors embedded in a 3D-printed finger cot for hand gesture recognition 集成设计和制造可穿戴式电容传感器，嵌入3d打印手指套，用于手势识别

IF 4.1 3区工程技术

Sensors and Actuators A-physical Pub Date : 2025-05-06 DOI: 10.1016/j.sna.2025.116664

Chin-Tai Chen, Jun-Hong Zhou

{"title":"Integrated design and manufacturing of wearable capacitive sensors embedded in a 3D-printed finger cot for hand gesture recognition","authors":"Chin-Tai Chen, Jun-Hong Zhou","doi":"10.1016/j.sna.2025.116664","DOIUrl":"10.1016/j.sna.2025.116664","url":null,"abstract":"<div><div>Versatile force sensors have dominated academic research and industries in micro-electro-mechanical systems for many applications over two decades. However, few studies have focused on flexible force-sensing devices that can be wearable directly for users in biosensing applications. In the study, we comprehensively report an integrated design of a flexible force-sensing device comprising a sandwiched-structure capacitive element embedded in a finger cot using a hybrid manufacturing process based on 3D printing. With silicone, graphene, and carbon nanotubes (CNT) prepared for the direct ink writing (DIW) process, the capacitive elements with a zigzag structure were formed from additive manufacturing and bonding with copper foils. At the same time, the finger cot was 3D-printed from photo resin of stereolithography (SLA). When wearing the SLA finger cot integrated with the DIW elements on a human hand, various activities of five hand fingers, such as making a fist, grasping an object, and recognizing different hand gestures, were demonstrated with multiple performances of the force-sensing device. In future studies, the hybrid method (DIW plus SLA) could be further explored with more functional materials and soft structures that would enable the heterogeneous integration of soft robotic devices to fit diverse wearable systems and applications, such as human-machine interfaces and adaptive machining learning.</div></div>","PeriodicalId":21689,"journal":{"name":"Sensors and Actuators A-physical","volume":"391 ","pages":"Article 116664"},"PeriodicalIF":4.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143929106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0