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2024 Biomedical Circuits and systems conference

作者： Wang, Zhongzheng Shao, Han O'Riordan, Alan Higos-Marquoz, Javier O'Connell, Ivan O'Hare, Daniel

ISBN: (纸本)9798350354966;9798350354959

This paper introduces a fast, high-accuracy methodology for conducting Electrochemical Impedance Spectroscopy' (EIS) based on Fast Fourier Transform (FFT), in order to meet the requirements of portable, real-time biomedical impedance-based detections. Instead of using white noise-like wideband signals as in conventional FFT-based EIS, the proposed method uses a square wave as the sensor excitation signal. This approach achieves a fast EIS measurement, but no longer requires complex circuits like high-resolution DACs or frequency mixers for the signal generation. The conditions where the sensor behaves like a pseudo electronic Linear Time-Invariance (LTI) circuit are firstly identified by investigating its large-signal behavior, Cyclic Voltammetry (CV), which ensures the sensor shows no potential-amplitude dependence, hence also providing possibilities for other novel EIS circuitry. A circuit consisting of a control amplifier and a Trans-Impedance Amplifier (TIA) is designed and fabricated with 65 nm CMOS to implement this methodology for validating its on-chip feasibility. This work shortens the EIS measurement time by 91.7% in a frequency sweep range from 0.5 Hz to 500 Hz, with only 1.48% average Mean Absolute Percentage Error (MAPE), compared to a commercial chemical instrument AutoLab, which ensures this method is suitable for portable, real-time EIS biomedical detections and applications.

关键词： ultra-microband CV EIS TIA FFT

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Wireless sensor Nodes for Condition Based Maintenance in Railway systems

Wireless Sensor Nodes for Condition Based Maintenance in Rai...

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2024 IEEE sensors conference

作者： Kersten, Philipp Buzin, Johannes Hirsch, Soeren Brandenburg Univ Appl Sci Dept Engn Brandenburg Germany

Ensuring the reliability, safety, and efficiency of railway systems is increasingly critical in global transportation networks. This paper addresses the necessity for advanced monitoring systems by introducing a multi... 详细信息

ISBN: (纸本)9798350363524;9798350363517

关键词： Wireless sensor node railway monitoring

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High sensitivity chipless RFID humidity sensor tag based on PVA film 43

High sensitivity chipless RFID humidity sensor tag based on ...

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43rd Chinese Control conference, CCC 2024

作者： Han, Bei Wang, Bo Xi'an University of Posts and Telecommunications School of Automation Xi'an710121 China

ISBN: (纸本)9789887581581

In this paper, a chipless RFID humidity sensor tag for integrated sensor for Internet of Things applications is proposed. By improving the square resonator, the surface of the sensor tag is covered with polyvinyl alcohol (PVA) film. Through the electromagnetic simulation software, the influence of the resonator structure parameters on the resonant characteristics is deeply analyzed, and the working frequency band and the size are optimized. In addition, the effects of different permittivity values on the resonant response are studied. The simulation results show that with the relative humidity changing from 29.1%RH to 90.9% RH, the resonant frequency presents a significant shift to the left, with a total shift of 620 MHz and a sensitivity of 10.03 MHz/%RH. The sensor labels designed are flexible and low cost, and can be deployed to a variety of low-cost sensor applications. © 2024 Technical Committee on Control Theory, Chinese Association of Automation.

关键词： Humidity sensors

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A Multi-Modal System with Wireless Flexible sensor Patches and a Depth-Sensing Imager for At-Home Monitoring of Rehabilitation Exercises

A Multi-Modal System with Wireless Flexible Sensor Patches a...

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2024 Biomedical Circuits and systems conference

作者： Yang, Runtian Hou, Yuhan Li, Yinfei Tyagi, Vansh Boudreault-Morales, Gloria-Edith Zhou, Shurui Zariffa, Jose Liu, xilin Univ Toronto Dept Elect & Comp Engn ECE Toronto ON Canada Univ Toronto Inst Biomed Engn Toronto ON Canada Univ Hlth Network UHN Toronto Rehabil Inst KITE Res Inst Toronto ON Canada

ISBN: (纸本)9798350354966;9798350354959

Long-term at-home monitoring of rehabilitation performance after spinal cord injuries is crucial for optimizing therapeutic outcomes, reducing the rehabilitation period, and improving patient quality of life. However, there is currently a lack of an easy-to-use system that allows patients to collect data during exercise. To address this gap, this paper introduces the development of a self-contained, multi-modal sensor system that captures surface electromyography (sEMG) and motion data, along with a depth-sensing imager for monitoring patient exercise activities. The system consists of a scalable number of wireless multi-sensor wearable patches that are easy to attach and comfortably worn over extended periods, and a time-of-flight depth-sensing imaging sensor, which detects patient activities while collecting minimal information to protect privacy. The multi-modal data is streamed to a Raspberry Pi and synchronized in real time. This system provides a new framework that supports the rehabilitation of spinal cord injuries and can be adapted for a broad range of other clinical monitoring applications.

关键词： Electromyography

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A Reconstruction Method for the Surface Potential of the High Voltage Charged Body Based on Quasi-Static Electric Field Theory 25

A Reconstruction Method for the Surface Potential of the Hig...

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25th International conference on Electromagnetics in advanced applications, ICEAA 2024

作者： Zhang, Bohao He, Shaoyin Song, Liang Chen, xiangyu School of Electrical Engineering Xi'an Jiaotong University Shaanxi Xi'an710049 China

ISBN: (纸本)9798350360974

In recent years, the large-scale AC and DC extra-high voltage transmission projects have been put into practical operation. Moreover, along with the breakthroughs and innovations in communication and artificial intelligence technologies, power systems are being promoted in the more innovative and intelligent development direction, which puts forward higher requirements for the monitoring and evaluation of the important status of various types of key high-voltage power equipment in the power systems. © 2024 IEEE.

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Electronic CPA-Laser Having Enhanced Sensitivity and Tunability

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advanced ELECTRONIC MATERIALS 2025年第7期11卷

作者： Yang, Minye Wang, Lukang Ye, Zhilu Zhong, Qi Jian, Baolong Zhang, xiaohui Oezdemir, Sahin K. Liu, Ming Xi An Jiao Tong Univ Sch Elect Sci & Engn State Key Lab Mfg Syst Engn Xian 710049 Shaanxi Peoples R China Xi An Jiao Tong Univ Ctr Mitochondrial Biol & Med Sch Life Sci & Technol State Key Lab Mfg Syst EngnKey Lab Biomed Informa Xian 710049 Shaanxi Peoples R China Penn State Univ Dept Engn Sci & Mech University Pk PA 16802 USA St Louis Univ Dept Elect & Comp Engn St Louis MO 63103 USA

Exceptional point degeneracies, which are spectral singularities of non-Hermitian systems, have been widely utilized for building optical, mechanical, or electrical sensing systems with much larger responses than those utilizing Hermitian degeneracies. However, such systems suffer from enhanced noise, which negates the enhanced response and thus does not provide any improvement in signal-to-noise ratio. Recently, the coherent perfect absorber (CPA)-laser, which also utilizes non-Hermitian singularity, has been used in sensing systems resulting in better noise robustness and enhanced responsivity. Nonetheless, CPA-laser (CPAL) implementation requires all system parameters to be immutable, which hinders progress toward their practical use for sensing purposes. Here, a tunable electronic CPA-laser is reported that overcomes these obstacles providing ultrahigh sensitivity as validated in the experiments for monitoring arterial pressure and respiration. This CPAL sensing scheme utilizes inductive coupling between gain and loss sub-components and thereby the whole system can be decomposed into an active reader and a passive sensor, which enables better tunability and performance compared to previously reported CPAL systems. Moreover, the proposed CPAL system exhibits better performance compared to exceptional point-based systems having a similar circuit structure. This research paves the way for exploring electronic CPAL for sensing applications and may have a profound impact on the next-generation, ultrasensitive electromagnetic sensing system.

关键词： coherent perfect absorber-laser epidermal sensing laser-scribed carbon black-polyethylene composites non-hermitian physics ultrasensitive sensing system

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How can sensor data accessibility be enhanced in IoT-based health monitoring systems? 19

How can sensor data accessibility be enhanced in IoT-based h...

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IEEE 19th conference on Industrial Electronics and applications (ICIEA)

作者： Wang, Ting Pileno, Adrian Amatriain Monacelli, Eric Univ Gustave Eiffel CNRS ESIEE Paris LIGM Marne La Vallee France Univ Publ Navarra ETSIIIT Navarra Spain Univ Versailles St Quentin En Yvelines LISV Velizy Villacoublay France

ISBN: (纸本)9798350360875;9798350360868

This paper outlines the development of an economical Internet of Things (IoT)-based real-time health monitoring system. The prototype integrates a microcontroller and various sensors to monitor essential health parameters, including temperature, heart rate (HR), electrocardiogram (ECG), blood oxygen saturation (SpO2), and blood pressure (BP). With a focus on enhancing the accessibility of sensor data, diverse access options were implemented using advanced technical methodologies. The collected sensor data was efficiently stored, uploaded to the cloud, and visualized through tools such as HTML, Blynk, PAX-DAQ, and PuTTY, enabling seamless access via mobile devices or laptops. The paper concludes with the presentation of measurement results and an initial analysis of the sensor data, affirming the practicality and effectiveness of the proposed methods.

关键词： IoT-based Health Monitoring microcontroller sensor data accessibility data visualization

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Design and Optimization of High-Performance Health Monitoring systems Using advanced sensor Networks 2

Design and Optimization of High-Performance Health Monitorin...

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2nd International conference on advanced Computing and Communication Technologies, ICACCTech 2024

作者： Mehta, Heena Singla, Mukesh Baba Mastnath University Dept. of Computer Science and Engineering Haryana Rohtak India

ISBN: (纸本)9798331519056

This research elucidates the development and optimization of advanced sensor network-based health monitoring systems. In response to the increasing need for accurate health data in real-time, advanced gadgets capable of continuously monitoring essential indicators have been created. Contemporary sensor technologies, such as biosensors, IoT devices, and WSN s, enable these systems to facilitate data collection and processing with little disturbance. Optimization techniques like PSO, including machine learning algorithms and energy conservation procedures, are used to enhance the system's performance, reliability, and battery longevity. The study focuses on developing robust and scalable systems suitable for various healthcare applications, while also investigating data processing, communication protocols, network architecture, and sensor selection. advanced sensor networks will be crucial for future health monitoring, as research indicates substantial improvements in monitoring accuracy, system efficiency, and patient outcomes. Present approach is supposed to provide scalable and efficient solution. Moreover, it would support privacy in order to provide secure solution. © 2024 IEEE.

关键词： Electronic health record

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Simultaneous enhancement of sensitivity, resonant frequency, and overload capability of piezoresistive accelerometers by heavily-doped fillet structures on sensing beams

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IEEE sensors Journal 2025年第11期25卷 19138-19146页

作者： xia, Yong Wang, Tao Lv, Yang Han, xiangguang Yu, Mingzhi Tan, Renjie Huang, Mimi Jia, Chen Zhao, Libo Sun, Lin Yang, Ping Lu, Dejiang Xi'an Jiaotong University School of Mechanical Engineering State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Xi'an710049 China Ningbo CRRC Times Transducer Technology Co. LTD Department of Basic Research and Development Ningbo315021 China Research Institute for Intelligent Sensing Technology and System School of Instrument Science and Technology State Key Laboratory for Manufacturing Systems Engineering State Industry-Education Integration Center for Medical Innovations International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies Xi'an Jiaotong University Xi'an710049 China Shandong Laboratory of Advanced Materials and green Manufacturing at Yantai Yantai264000 China

High sensitivity, high natural frequency, and high overload capability are desired for accelerometers used in industrial applications, but simultaneously enhancing all is challenging. Here, via designing novel heavily-doped fillet structures, we prove the sensitivity, resonant frequency, and overload capability can be simultaneously enhanced. The enhancements are attributed to regulations of stress concentration and effective sensing regions by the heavily-doped fillets. The sensors with and without fillets are designed, fabricated, packaged, and tested. The results show a sensitivity of 0.31±0.02 mV/g@5V, a natural frequency of 37.87±2.09 kHz, and an overload of 10040.17±531.76 g for sensors with 10-μm fillets, which are superior to 0.27±0.01 mV/g@5V, 34.13±0.90 kHz, and 7368.55±843.92 g for those no-fillet counterparts. Additionally, the developed sensor further exhibited feasibility in air-bearing vibration monitoring. The proposed design is envisioned to give insights into the novel designs of high-performance stress-based sensors, including accelerometers, pressure sensors, and strain gauges. © 2001-2012 IEEE.

关键词： Strain gages

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A Second -Order Noise -Shaping SAR ADC for Biomedical sensor applications

A Second -Order Noise -Shaping SAR ADC for Biomedical Sensor...

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2024 Biomedical Circuits and systems conference

作者： Sun, Haoning Sun, Kangkang Wang, Yuchen Mo, Wenji Yan, Feng Liu, Jingling Sun Yat Sen Univ Sch Elect & Commun Engn Shenzhen Peoples R China

ISBN: (纸本)9798350354966;9798350354959

This paper proposes a low -power, area -efficient, and high-precision fully passive second-order noise -shaping (NS) successive approximation register (SAR) analog-to-digital converter (ADC) for a portable multi -channel biosignal recorder to detect abnormal action potentials in epilepsy. The proposed fully passive noise-shaping technique achieves a second -order noise transfer function (NTF) using only switched capacitor and a single-input-pair comparator, resulting in significant benefits in power consumption and accuracy. The power consumption is further reduced and the circuit area is minimized by employing a split-segmented capacitor digital -to analog converter (CDAC) array. The proposed second -order NS SAR ADC is implemented using a 180nm CMOS process with an area of 0.3x0.28mm(2). Simulation results show that the circuit consumes 86 mu W at a 1.2V supply voltage when the sampling rate is 10MS/s. It achieves a signal-to-noise and distortion ratio (SNDR) of 92.66dB, an effective number of bits (ENOB) of ***, a bandwidth of 80kHz, a Schreier figure of merit (FoM(s)) of 182.3dB, and a Walden figure of merit (FoM(w)) of 15fJ/conv.-step.

关键词： biosensor system noise-shaping SAR ADC split segmented capacitor array

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