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pressure sensor array Based on Four DNA-Nanoenzymes with Catalase-like Activity for Portable Multiple Detection of Foodborne Pathogens

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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024年第2期73卷 1694-1702页

作者： Jiao, Jingbo Kang, Qing Ma, Chenjing Lin, Tong Xiao, Zehui Du, Ting Wang, Nan Du, Xinjun Wang, Shuo Tianjin Univ Sci & Technol Minist Educ Engn Res Ctr Food Biotechnol State Key Lab Food Nutr & Safety Tianjin 300457 Peoples R China Tianjin Univ Sci & Technol Coll Biotechnol Tianjin 300457 Peoples R China Nankai Univ Sch Med Tianjin Key Lab Food Sci & Hlth Tianjin 300071 Peoples R China

This study has developed a pressure sensor array based on four functionalized DNA-nanoenzymes with catalase-like activity for multiple detections of foodborne pathogens through a portable pressure manometer. Benefiting from functionalization of 4-mercaptophenylboronic acid and beta-mercaptoethylamine, the diversity of nonspecific interactions between four DNA-nanoenzymes and each of the nine bacteria leads to differences in pressure response patterns by catalyzing H2O2 to generate exclusive "fingerprints". As effective statistical tools for processing multivariate data, principal component analysis and hierarchical clustering analysis are employed to identify nine foodborne pathogens by analyzing pressure response patterns. Furthermore, the as-prepared sensor array can discriminate different mixtures of bacteria and achieve quantitative detection, with an average detection limit of 102 and 104 CFU mL-1 for Gram-positive and Gram-negative bacteria, respectively, demonstrating its desirable practicality and satisfactory accuracy for real sample detection. This study expands insights into multiple analyses of foodborne pathogens for food safety monitoring.

关键词： catalase-like activity functionalized DNA-nanoenzymes foodborne pathogens pressure sensor array principal component analysis

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pressure sensor array Based Nonlinear Robust Pitch Control for Small or Micro Aerial Vehicle

Pressure Sensor Array Based Nonlinear Robust Pitch Control f...

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American Control Conference (ACC)

作者： Shen, He Xu, Yunjun Remeikas, Charles Univ Cent Florida Dept Mech Mat & Aerosp Engn Orlando FL 32816 USA

ISBN: (纸本)9781457710964;9781457710957

Maintaining stable flight of small unmanned or micro aerial vehicles (SUAVs or MAVs) is complicated by many real world challenges. Inspired by biological systems, in this paper, an innovative pressure distribution based pitch control method is proposed. A nonlinear controller, which is robust to uncertainties and un-modeled dynamics, is designed to achieve accurate pitch control. It is expected that the flight control design utilizing the real-time sensed pressure information will significantly enhance the stability and agility of SUAVs or MAVs.

关键词： Micro aerial vehicle nonlinear robust control pressure sensor array aerospace control

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Use of a pressure sensor array for multifunctional patient monitoring in radiotherapy: A feasibility study

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MEDICAL PHYSICS 2024年第8期51卷 5582-5592页

作者： Jeon, Hosang Kim, Dong Woon Joo, Ji Hyeon Park, Dahl Kim, Wontaek Nam, Jiho Kim, Dong Hyeon Ki, Yongkan Pusan Natl Univ Dept Radiat Oncol Yangsan Hosp Yangsan South Korea Pusan Natl Univ Res Inst Convergence Biomed Sci & Technol Yangsan Hosp Yangsan South Korea Pusan Natl Univ Dept Radiat Oncol Sch Med Yangsan South Korea Pusan Natl Univ Hosp Dept Radiat Oncol Busan South Korea 20 Geumo Ro Yangsan Si Gyeongsangnam D South Korea

BackgroundModern radiotherapeutic techniques, such as intensity-modulated radiation therapy or stereotactic body radiotherapy, require high-dose delivery precision. However, the precise localization of tumors during patient respiration remains a challenge. Therefore, it is essential to investigate effective methods for monitoring respiration to minimize potential complications. Despite several systems currently in clinical use, there are drawbacks, including the complexity of the setup, the discomfort to the patient, and the high *** study investigated the feasibility of using a novel pressure sensor array (PSA) as a tool to monitor respiration during radiotherapy treatments. The PSA was positioned between the treatment couch and the back of the patient lying on it and was intended to overcome some limitations of current methods. The main objectives included assessing the PSA's capability in monitoring respiratory behavior and to investigate prospective applications that extend beyond respiratory *** PSA with 31 pressure-sensing elements was used in 12 volunteers. The participants were instructed to breathe naturally while lying on a couch without any audio or visual guidance. The performance of the PSA was compared to that of a camera-based respiratory monitoring system (RPM, Varian, USA), which served as a reference. Several metrics, including pressure distribution, weight sensitivity, and correlations between PSA and RPM signals, were analyzed. The PSA's capacity to provide information on potential applications related to patient stability was also *** linear relationship between the weight applied to the PSA and its output was demonstrated in this study, confirming its sensitivity to pressure changes. A comparison of PSA and RPM curves revealed a high correlation coefficient of 0.9391 on average, indicating consistent respiratory cycles. The PSA also effectively measured the weight distribution at the volunteer's

关键词： gated radiotherapy patient setup pressure sensor array respiratory monitoring weight distribution

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Monitoring Driving Psychological Fatigue Through Unconstrained Heartbeat Signal Extraction by Using pressure sensor array

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IEEE ACCESS 2020年 8卷 22193-22202页

作者： Sun Hongchang Zhang Zhijing Jin Xin Deng Sanpeng Jiang Yongxiang Zheng Zhongpeng Beijing Inst Technol Sch Mech Engn Beijing 100081 Peoples R China Tianjin Univ Technol & Educ Inst Robot & Intelligent Equipment Tianjin 300090 Peoples R China

The feasibility of monitoring driving psychological fatigue through unconstrained heartbeat extraction by using pressure sensors array was investigated. The pressure signals were obtained by close contact between subject's back and backrest of car seat. Correlation coefficients of electrocardiogram signals and pressure signals were used to select the optimal monitoring point due to the unavoidable adjustment of sitting posture during long times of driving. Lifting wavelet transform was applied for de-noising. J-J interval signals, which represent heartbeat signals, were extracted. The correlation dimension of heartbeat signals, reflecting the complicated degree and the chaotic level of a nonlinear dynamic system, was used as the indicator to determine the psychological fatigue. Its validity was verified by the consistency of correlation dimension with R-R interval (represents cardiac cycle). Finally, questionnaires during driving were administered. The effectiveness of this method to judge driver psychological fatigue was confirmed. This finding indicates that driving psychological fatigue can be monitored through unconstrained heartbeat signal extraction by using the pressure sensor array.

关键词： pressure sensor array correlation coefficients heartbeat signals unconstrained heartbeat extraction correlation dimension

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Customizable pressure sensor array: Design and Evaluation

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IEEE sensorS JOURNAL 2018年第15期18卷 6337-6344页

作者： Chen, Diliang Cai, Yi Huang, Ming-Chun Case Western Reserve Univ Dept Elect Engn & Comp Sci Cleveland OH 44106 USA

pressure senor array is widely used in gait analysis and robotics. To meet the demand on different sizes and reduce the manufacture costs, in this paper, we proposed a design method for customizable pressure sensor array which could be trimmed into different sizes. The customizable pressure sensor array was made of piezo-resistive fabric and flexible circuits, which made it suitable for the sensor array to be trimmed into different sizes. pressure sensors were uniformly distributed to maintain the resolution of the pressure sensor array when trimmed into different sizes. Wires on the flexible circuits were designed to ensure that all the full/partial sensors remained on the sensor array could be used after trimming the sensor array into a smaller size. To evaluate the design method, we designed insole shaped customizable pressure sensor arrays to analyze gait parameters such as gait cycle and cadence. Spatial and temporal pressure distribution patterns acquired with trimmed and nont center dot immed sensor arrays were used for analyzing. Experiment results indicated that the customizable pressure sensor array designed with the method proposed in this paper could he used to acquire spatial and temporal pressure distribution patterns without being influenced by trimming.

关键词： pressure sensor array trim customizable wearable gait analysis

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A Flexible Underwater pressure sensor array Using a Conductive Elastomer Strain Gauge

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JOURNAL OF MICROELECTROMECHANICAL SYSTEMS 2012年第4期21卷 897-907页

作者： Yaul, Frank M. Bulovic, Vladimir Lang, Jeffrey H. MIT Dept Elect Engn & Comp Sci Cambridge MA 02139 USA

This paper presents a flexible pressure sensor array which is demonstrated to transduce underwater pressure variations produced by moving objects and surface waves. The sensors exhibit a 0.0014 fractional resistance change per 100 Pa, achieving a high 1.5-Pa pressure resolution. The measurement has a repeatability of 22% of the peak amplitude of the pressure waveform, due to creep. Additionally, sensor operation while bent to a 0.5-m radius of curvature is demonstrated. Each sensor consists of a strain-concentrating polydimethylsiloxane (PDMS) diaphragm and a resistive strain gauge made of a conductive carbon-black-PDMS composite. A 1-D array of four sensors with a 15-mm center-to-center spacing is fabricated, and the dynamic response of the sensors is characterized and modeled.

关键词： Carbon black conductive elastomer flexible high sensitivity modeling polydimethylsiloxane (PDMS) pressure sensor array underwater

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Proposal of a Fetal Movement Sharing System Using a pressure sensor array 26th

Proposal of a Fetal Movement Sharing System Using a Pressure...

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26th International Conference on Human-Computer Interaction (HCII)

作者： Kosaka, Takayuki Tokai Univ Hiratsuka Kanagawa Japan

ISBN: (纸本)9783031619656;9783031619663

We propose a novel fetal movement sharing system employing a pressure sensor array-based fetal movement scanner and a display device. The proposed system aims to bridge the gap between subjective fetal movements experienced by pregnant women and objective shareable fetal movement data that enable fathers and other family members to strengthen their bond with the fetus. The system can be easily mounted on the abdomen of a pregnant woman, allowing the scanner to capture detailed data about the location and intensity of fetal movements;the display device visually and tactilely reproduces these movements and makes them available for viewing. Experiments conducted on pregnant women demonstrate the system's ability to measure and reproduce fetal movements, thus providing insights into the fetus's health and activity patterns. Feedback from individuals with and without childbirth experience has indicated the system's potential to promote emotional connections and strengthen family bonds. This innovative approach not only contributes to the scientific understanding of fetal movements but also provides a new aspect of prenatal care that emphasizes the emotional and psychological well-being of the whole family.

关键词： Fetal Movement Sharing System pressure sensor array Prenatal Care Objective Measurement of Fetal Movement Emotional and Psychological Well-being

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Scalable Manufacturing of Large-Area pressure sensor array for Sitting Posture Recognition in Real Time

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ACS MATERIALS AU 2023年第6期3卷 669-677页

作者： Zheng, Lu Hou, Xuemin Xu, Manzhang Yang, Yabao Gao, Jiuwei Luo, Lei Zhu, Qixuan Li, Weiwei Wang, Xuewen Northwestern Polytech Univ Frontiers Sci Ctr Flexible Elect Xian 710072 Peoples R China Northwestern Polytech Univ Inst Flexible Elect Xian 710072 Peoples R China Northwestern Polytech Univ Shaanxi Key Lab Flexible Elect KLoFE Xian 710072 Peoples R China Northwestern Polytech Univ MIIT Key Lab Flexible Elect KLoFE Xian 710072 Peoples R China

pressure sensors are considered the key technology forpotentialapplications in real-time health monitoring, artificial electronicskins, and human-machine interfaces. Despite the significantprogress in developing novel sensitive materials and constructingunique sensor structures, it remains challenging to fabricate large-areapressure sensor arrays due to the involvement of complex proceduresincluding photolithography, laser writing, or coating. Herein, a scalablemanufacturing approach for the realization of pressure sensor arrayswith substantially enlarged sensitive areas is proposed using a versatilescreen-printing technique. A compensation mechanism is introducedinto the printing process to ensure the precise alignment of conductiveelectrodes, insulation layers, and sensitive microstructures withan alignment error of less than 4 & mu;m. The fully screen-printedsensors exhibit excellent collective sensing performance, such asa reasonable pressure sensitivity of -2.2 kPa(-1), a fast response time of 40 ms, and superior durability over 3000consecutive pressures. Additionally, an integrated 16 x 32 pressuresensor array with a sensing area of 190 x 380 mm(2) isdemonstrated to precisely recognize the sitting postures and the bodyweights, showing great potential in continuous and real-time healthstatus monitoring.

关键词： pressure sensor array screen printing largearea siting posture recognition compensation mechanism

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Inference System for Automatic Identification of Braille Blocks Using a pressure sensor array

Inference System for Automatic Identification of Braille Blo...

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IEEE International Conference on Pervasive Computing and Communications (PerCom)

作者： Kuzume, Koichi Watanabe, Yoshitugu Masuda, Haruko Masuzaki, Tomonari Yuge Coll Natl Inst Technol Dept Informat Engn Kamijima Japan Yuge Coll Natl Inst Technol Adv Course Prod Engn Kamijima Japan

ISBN: (纸本)9781665416474

Visually impaired people usually use braille blocks as guidance marks when walking outside. Therefore, detecting the braille blocks accurately is very important for them to walk safely. In our previous research we proposed a novel system for recognizing braille blocks, mainly in an outdoor setting, using not only the information from a white cane but also a pressure sensor array to realize the braille block more accurately. Moreover, we showed our system could be constructed using a Neural Network with an extremely simple structure. In this research we developed an inference system for automatic identification of braille blocks based on the previous research results. The system consisted of a 16-channel foot pressure sensor array, a microcomputer and a cloud system, which respectively detected the difference in pressure pattern depending upon the type of braille block, made inferences about the kinds of braille blocks and implemented machine learning. We made a prototype system and confirmed that the system could infer the kinds of braille blocks with high accuracy in real-time.

关键词： inference braille block machine learning identification pressure sensor array

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Force Estimation with a Non-Uniform pressure sensor array

Force Estimation with a Non-Uniform Pressure Sensor Array

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25th IEEE Instrumentation and Measurement Technology Conference

作者： Holtzman, M. Arcelus, A. Veledar, I. Goubran, R. Sveistrup, H. Guitard, P. Carleton Univ Dept Syst & Comp Engn 1125 Colonel Dr Ottawa ON K1S 5B6 Canada Univ Ottawa Sch Rehabil Sci Ottawa ON K1H 8M5 Canada

ISBN: (纸本)9781424415403

Embedding pressure sensors into household fixtures enables unobtrusive occupant health and safety monitoring at home. To monitor bathroom grab bar use, the force applied to a grab bar is desired from the output of three embedded pressure sensors. We examine the measurement of applied force in a non-uniform pressure sensor array, where forces are distributed with spatial nonlinearity to the pressure sensors. Two methods that ignore the spatial nonlinearities are compared to two methods that incorporate them. These include a polynomial response curve, a theoretical model, a lookup table, and an artificial neural network. When many calibration points can be taken and location estimates are accurate, the location-based lookup table presented the lowest error. However when calibration time is limited, the theoretical model performs best, while an artificial neural network is preferred when location inputs are inaccurate.

关键词： pressure sensor array nonlinear signal processing calibration intelligent sensors smart homes

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