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Journal articles on the topic 'Chip-less sensor'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Khalid, Nabil, Rashid Mirzavand, and Ashwin K. Iyer. "A Survey on Battery-Less RFID-Based Wireless Sensors." Micromachines 12, no. 7 (2021): 819. http://dx.doi.org/10.3390/mi12070819.

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We present a survey on battery-less Radio Frequency Identification (RFID-based wireless sensors that have emerged in the past several years. We discuss the evolution of RFID turning into wireless sensors. Moreover, we talk about different components of these battery-less RFID-based wireless sensors, five main topologies that transform a simple RFID chip into a battery-less wireless sensor, and state-of-the-art implementations of these topologies. In battery-less wireless sensors, the read range is of key importance. Hence, we discuss how each component of the sensor plays its role in determini

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2

Tanumihardja, Esther, Wouter Olthuis, and Albert van den Berg. "Ruthenium Oxide Nanorods as Potentiometric pH Sensor for Organs-On-Chip Purposes." Sensors 18, no. 9 (2018): 2901. http://dx.doi.org/10.3390/s18092901.

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A ruthenium oxide (RuOx) sensor for potentiometric pH sensing is currently being developed for organs-on-chip purposes. The sensor was fabricated from a Ru(OH)3 precursor, resulting in RuOx nanorods after heating. An open-circuit potential of the RuOx electrode showed a near-Nernstian response of −58.05 mV/pH, with good selectivity against potentially interfering ions (lithium, sulfate, chloride, and calcium ions). The preconditioned electrode (stored in liquid) had a long-term drift of −0.8 mV/h, and its response rate was less than 2 s. Sensitivity to oxygen was observed at an order of magnit

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Chen, Qing Xie, Jing Jing Chen, and Yi Biao Fan. "The Study of Control Strategy for Sensor-Less PMSM." Advanced Materials Research 1006-1007 (August 2014): 575–80. http://dx.doi.org/10.4028/www.scientific.net/amr.1006-1007.575.

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Targeting development of control system of a permanent magnet synchronous motor applied to high precision requirement, A strategy is researched to develop a single chip with built-in sensor-less control algorithm which is used as the control core of PMSM control system, the composition of the hardware and the realization of software of the chip are designed, and the simulation experiment is carried out to verify feasibility and rationality of the control strategy as well.

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Wu, Ziyue, Jiaqi Wang, Chao Bian, Jianhua Tong, and Shanhong Xia. "A MEMS-Based Multi-Parameter Integrated Chip and Its Portable System for Water Quality Detection." Micromachines 11, no. 1 (2020): 63. http://dx.doi.org/10.3390/mi11010063.

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As an important means to protect water resources, water quality detection is of great social and economic significance. Water quality detection sensors processed by micro-electro-mechanical system (MEMS) technology have the advantages of low-cost, small size, and high sensitivity. In this paper, a multi-parameter water quality detection integrated sensor chip is further studied, and a portable detection system using this chip is developed. Temperature, pH, oxidation-reduction potential (ORP), conductivity and concentration of copper ions (Cu2+) are selected as typical water quality parameters.

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Liu, Ya Xin, Xiu Shan Song, Yu Feng Yao, Bo Huang, and Ming Zhong. "A Micromachined Glucose Monitoring Sensor with Diffusion Control." Key Engineering Materials 609-610 (April 2014): 879–84. http://dx.doi.org/10.4028/www.scientific.net/kem.609-610.879.

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Considering the long-term, flexible blood glucose monitoring demand, a sensor monitoring system for interstitial fluid (ISF) ultrafiltration sampling and on-line monitoring of blood glucose is presented. In this paper, the glucose sensor chip used in this system will be introduced in detailed. This sensor chip was developed by MEMS technique and it has the advantages of less ISF consumption, smaller structures and easier integration. Otherwise, the silicon glucose sensor chip is provided with diffusion control of the analyte through a porous silicon membrane into a silicon etched cavity contai

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Yu, Hai Xia, Da Chao Li, Yong Jie Ji, Xiao Li Zhang, and Ke Xin Xu. "An Interstitial Fluid Transdermal Extraction Chip with Vacuum Generator and Volume Sensor for Continuous Glucose Monitoring." Key Engineering Materials 562-565 (July 2013): 571–75. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.571.

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A five layer microfluidic chip which is designed and fabricated for interstitial fluid (ISF) transdermal extraction, collection, and measurement toward the application of continuous and real-time glucose monitoring is presented in this paper. The microfluidic chip consists of a Venturi tube generating vacuum for ISF extraction and fluid manipulation, a novel volume sensor of electrolytic fluid for normal saline input volume control and ISF volume measurement, pneumatic valves for fluid management, and access ports for glucose sensor integration. The output vacuum of the Venturi tube is tested,

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Aaryashree, Yuuto Takeda, Momoe Kanai, Akihiko Hatano, Yasuo Yoshimi, and Masahito Kida. "A “Single-Use” Ceramic-Based Electrochemical Sensor Chip Using Molecularly Imprinted Carbon Paste Electrode." Sensors 20, no. 20 (2020): 5847. http://dx.doi.org/10.3390/s20205847.

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An inexpensive disposable electrochemical drug sensor for the detection of drugs (vancomycin, meropenem, theophylline, and phenobarbital) is described. Molecularly imprinted polymer (MIP) templated with the target drugs was immobilized on the surface of graphite particles using a simple radical polymerization method and packed into the working electrode of a three-electrode ceramic-based chip sensor. Differential pulse voltammetry (DPV) was used to determine the relationship between the response current and the concentration of the targeted drug while using one sensor chip for one single opera

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Nouri Moqadam, Aslan, and Robab Kazemi. "A novel triple-band microwave chip-less sensor tag for structural health monitoring applications." Electromagnetics 39, no. 7 (2019): 524–35. http://dx.doi.org/10.1080/02726343.2019.1658168.

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Ueno, Yuko, and Kazuaki Furukawa. "On-Chip FRET Graphene Aptasensor." International Journal of Automation Technology 12, no. 1 (2018): 37–44. http://dx.doi.org/10.20965/ijat.2018.p0037.

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We review the recent advances in the use of our originally developed on-chip graphene aptasensor to detect biologically important proteins, such as cancer markers. The detection mechanism, based on fluorescence resonance energy transfer (FRET), occurs at a graphene–biomolecule interface. In our system, the graphene surface is modified with a pyrene–aptamer–dye probe. Pyrene functions as a linker to the graphene surface, the aptamer as a probe for selective protein recognition, and the dye as a fluorescence detection tag. Here, graphene behaves simultaneously as both an efficient acceptor for F

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Xie, Bao Zhong, and Tie Qun Chen. "Serial-Parallel Combined Distributed Algorithm For High Speed Sampled Data Filter of Sensor Signal." Advanced Materials Research 317-319 (August 2011): 996–1001. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.996.

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Distributed Algorithm (DA) has been applied widely because it doesn’t need multiply operation. The serial structure DA takes less chip resource but more calculation time, while the full pipeline parallel structure DA is just the reverse. A Serial-Parallel combined DA is proposed in this paper to take full advantages of the above structures to realize sampled data filter from sensor signal. Through the verification by simulation and synthesization, it is shown that the proposed improved serial-parallel DA can realize real time high speed sampled data filter from sensor, and it can reach the bes

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11

Liu, Peng, Richard J. Martin, and Liang Dong. "Micro-electro-fluidic grids for nematodes: a lens-less, image-sensor-less approach for on-chip tracking of nematode locomotion." Lab Chip 13, no. 4 (2013): 650–61. http://dx.doi.org/10.1039/c2lc41174a.

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12

Inomata, Naoki, Masaya Toda, and Takahito Ono. "Microfabricated Temperature-Sensing Devices Using a Microfluidic Chip for Biological Applications." International Journal of Automation Technology 12, no. 1 (2018): 15–23. http://dx.doi.org/10.20965/ijat.2018.p0015.

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Microelectromechanical systems (MEMS) and micrototal analysis systems (μTAS) have been developed using microfabrication technologies. As MEMS and μTAS contribute to smaller, higher-performance, less expensive, and integrated sensing techniques, they have been applied in many fields. In this paper, we focus on microfabricated thermal detection devices, including a microthermistor fabricated using vanadium oxide (VOx) and a resonant thermal sensor integrated into a microfluidic chip, and we present the research work we have done into biological applications, applications using a unique material

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13

Wang, Wen, Xueli Liu, Shengchao Mei, Mengwei Liu, Chao Lu, and Minghui Lu. "Development of a High Stability Pd-Ni Alloy Thin-Film Coated SAW Device for Sensing Hydrogen." Sensors 19, no. 16 (2019): 3560. http://dx.doi.org/10.3390/s19163560.

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A Pd-Ni alloy thin-film coated surface acoustic wave (SAW) device is proposed for sensing hydrogen. The Pd-Ni thin-film was sputtered onto the SAW propagation path of a SAW device with a delay line pattern to build the chip-sized hydrogen sensor. The prepared sensor chip was characterized by employing a differential oscillation loop. The effect of the Pd-Ni film thickness on sensing performance was also evaluated, and optimal parameters were determined, allowing for fast response and high sensitivity. Excellent working stability (detection error of 3.7% in half a year), high sensitivity (21.3

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Liang, Zi Yi, Xin Nan Qu, and Xiang Hui Zhao. "Exploration Based on ZigBee Traffic Signals Area Control System." Applied Mechanics and Materials 135-136 (October 2011): 535–39. http://dx.doi.org/10.4028/www.scientific.net/amm.135-136.535.

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In order to solve the problem of traffic jams, this paper presents a solution about traffic signals area control system based on ZigBee wireless sensor network. The basic idea is to connect the area's traffic lights through ZigBee wireless sensor network according to the traffic flow during a time period where the system located. The command center coordinates and controls the length of the green signal, period and the time of the green signal on all roads through the ZigBee wireless sensor network, so that the motor vehicles which move from corresponding two-way intersections could get throug

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15

Arathy, K., Seema Ansari, and K. A. Malini. "High reliability thermistor probes for early detection of breast cancer using skin contact thermometry with thermal imaging." Materials Express 10, no. 5 (2020): 620–28. http://dx.doi.org/10.1166/mex.2020.1682.

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Early detection and wide spread screening of breast cancer can reduce the mortality rate considerably. Affordable and easy to use screening device is essential for mass screening. In this paper, we demonstrate a simple, precise and easy tool for screening and early detection of breast cancer based on the higher temperature of abnormal tissues. We have made excellent reliability chip thermal sensor probes and developed 3D and 2D thermal imaging system that can predict the hot spot precisely by simple surface temperature measurements. The chip thermal sensor probes show less than 0.5% drift in r

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16

Zhuang, Qing. "Weighing System Design Based on Single Chip Microcomputer." Advanced Materials Research 1070-1072 (December 2014): 1572–75. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.1572.

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As the living standards of people improve continually, commercial behavior is becoming more and more modernized, people also put forward new requirements for the speed and accuracy of goods measurement. This paper designs a weighing system of digital electronic scale which is similar to the MCU simulation, and gives the design diagram, hardware composition and software system. This system takes the 51 single chip microcomputer as the core, the main components are the dedicated 24 bits serial A/D conversion chip HX711, cantilever type resistance strain sensor, the four digital tube display. Thi

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Hoffmeister, Hans Werner, and Arne Gerdes. "Finite Element Simulation of Quick – Stop Experiments for Better Understanding of Chip Formation in Grinding." Advanced Materials Research 223 (April 2011): 764–73. http://dx.doi.org/10.4028/www.scientific.net/amr.223.764.

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Several authors have previously simulated chip formation and their behaviour at the orthogonal cutting process. In contrast the chip formation for grinding was less investigated. This paper introduces a quick-stop device which allows easy investigation of the chip formation for the grinding process. For this process a workpiece forced by compressed air is shot against a single grain diamond with a large negative rake angle. Cutting forces were measured with a piezo electric sensor and discussed for a cutting speed range from 10m/s up to 30m/s. In Abaqus/Explicit a lagrangian formulation based

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18

Carvalho Freitas, Luis Miguel, and Fernando Morgado-Dias. "Reference Power Supply Connection Scheme for Low-Power CMOS Image Sensors Based on Incremental Sigma-Delta Converters." Electronics 10, no. 3 (2021): 299. http://dx.doi.org/10.3390/electronics10030299.

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Modern Complementary Metal-Oxide-Semiconductor (CMOS) image sensors, aimed to target low-noise and fast digital outputs, are fundamentally based on column-parallel structures, jointly designed with oversampling column converters. The typical choice for the employed column converters is the incremental sigma-delta structures, which intrinsically perform the correlated multiple sampling, creating an averaging effect over the system thermal noise when used in conjunction with 4T-pinned pixels. However, these types of column converters are known to be power-hungry, especially if the imaging device

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19

Ma, Tao, Xiaoxia Chen, Qing Peng, Pengfei Zhang, and Yonghong He. "Surface functionalization of SPR chip for specific molecular interaction analysis under flow condition." Journal of Innovative Optical Health Sciences 10, no. 02 (2017): 1650040. http://dx.doi.org/10.1142/s1793545816500401.

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Surface functionalization of sensor chip for probe immobilization is crucial for the biosensing applications of surface plasmon resonance (SPR) sensors. In this paper, we report a method circulating the dopamine aqueous solution to coat polydopamine film on sensing surface for surface functionalization of SPR chip. The polydopamine film with available thickness can be easily prepared by controlling the circulation time and the biorecognition elements can be immobilized on the polydopamine film for specific molecular interaction analysis. These operations are all performed under flow condition

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20

Jia, Xingjian, and Changbao Chu. "Design of Intelligent Hanger Based on Single Chip and Pro-E." Open Electrical & Electronic Engineering Journal 7, no. 1 (2013): 131–37. http://dx.doi.org/10.2174/1874129001307010131.

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A new type of intelligent hanger was designed based on single chip and Pro-E software. 3D entity model of actuator and cover curtain mechanism are established by Pro-E. Wings structure of hanger mechanical part was adopted screw rod and motor combination of the lifting mechanism can make the wings outspread and fold, unique cover curtain structure was adopted. Cover curtain rolls up and down through the motor driving. The control system adopts AT89C52 single chip. According to the information that coming from the rain sensor and the temperature sensor, two stepper motor’s positive and negative

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Li, Peng, Wei Xi, Xianggen Yin, Hao Yao, and Huafeng Chen. "Design of a CMOS Lineal Hall Sensor Front-End Working in Current Mode with Programmable Gain Stage for Power Specific Chip." Journal of Sensors 2021 (February 1, 2021): 1–5. http://dx.doi.org/10.1155/2021/6618206.

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With the continuous intelligentization of power systems, the demand for the integration of digital chips and sensor chips such as the Internet of Things is also increasing. A CMOS lineal magnetic Hall sensor front-end working in current mode with programmable gain stage is designed and implemented with SMIC 55 nm standard CMOS technology. By using a spinning-current technique, chopper technique, and digital calibration technique to eliminate the offset voltage and nonlinearity, this magnetic Hall sensor can be easily integrated into digital systems like SoCs. This work has already finished the

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22

Pranti, Anmona, Daniel Loof, Sebastian Kunz, Volkmar Zielasek, Marcus Bäumer, and Walter Lang. "Ligand-Linked Nanoparticles-Based Hydrogen Gas Sensor with Excellent Homogeneous Temperature Field and a Comparative Stability Evaluation of Different Ligand-Linked Catalysts." Sensors 19, no. 5 (2019): 1205. http://dx.doi.org/10.3390/s19051205.

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This paper presents a thermoelectric gas microsensor with improved stability where platinum nanoparticles linked by bifunctional ligands are used as a catalyst. The sensor design provides a homogeneous temperature field over the membrane, an important factor for the long-term stability of the catalyst. A comprehensive study of heat transfer from the chip is performed to evaluate the convection heat loss coefficient and to understand its effect on the homogeneity of the temperature field in a real-time situation. The effect of highly heat-conductive thermopiles is also analyzed by comparing the

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23

Zhang, Shiyong, and Gongliang Chen. "Micro-Trivium: A lightweight algorithm designed for radio frequency identification systems." International Journal of Distributed Sensor Networks 13, no. 2 (2017): 155014771769417. http://dx.doi.org/10.1177/1550147717694171.

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Distributed sensor networks have been widely applied to healthcare, environmental monitoring and management, intelligent transportation, and other fields in which network sensors collect and transmit information about their surrounding environment. Radio frequency identification technology transmits an object’s identification as a unique serial number—using radio waves as the transmission carrier—and is becoming an important building block for distributed sensor networks. However, the security of radio frequency identification systems is a major industrial concern that can significantly hinder

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Jia, Xing Jian. "Design of Intelligent Hanger Based on AT89C52 Single-Chip Microcomputer." Advanced Materials Research 694-697 (May 2013): 1475–78. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.1475.

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A new type of intelligent hanger was designed. Wings structure of hanger mechanical part was adopted,screw rod and motor combination of the lifting mechanism can make the wings outspread and fold, unique cover curtain structure was adopted. Cover curtain roll up and down through the motor driving.The control system adopts AT89C51 single-chip microcomputer. According to the information that coming from the rain sensor and the temperature sensor, two stepper motor’s positive and negative rotational motion was controlled.So as to realize automatic adjustment when it rains. The hanger will be auto

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Flitti, Farid, Aicha Far, Bin Guo, and Amine Bermak. "A Robust and Low-Complexity Gas Recognition Technique for On-Chip Tin-Oxide Gas Sensor Array." Journal of Sensors 2008 (2008): 1–6. http://dx.doi.org/10.1155/2008/465209.

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Gas recognition is a new emerging research area with many civil, military, and industrial applications. The success of any gas recognition system depends on its computational complexity and its robustness. In this work, we propose a new low-complexity recognition method which is tested and successfully validated for tin-oxide gas sensor array chip. The recognition system is based on a vector angle similarity measure between the query gas and the representatives of the different gas classes. The latter are obtained using a clustering algorithm based on the same measure within the training data

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Amar, Achraf Ben, Houssem Eddine Amor, Hung Cao, and Ammar B. Kouki. "Fabrication of LTCC Micro-fluidic Devices For Wireless Lab-On-A-Chip Applications." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, CICMT (2016): 000085–88. http://dx.doi.org/10.4071/2016cicmt-wa12.

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Abstract Low temperature co-fired ceramic (LTCC) based microfluidic sensors have been developed for biomedical and environmental sensing systems. This paper introduces a microfluidic chamber based on impedance spectroscopy measurements using LTCC technology for wireless Lab-On-A-Chip (LOC) applications. To overcome the channel sagging during the fabrication process, we used sacrificial carbon tapes as solid inserts, thus guiding the LTCC to follow their shape upon lamination and then formed micro-channels. The measurement chamber was a parallel-plate capacitive structure with 85 μm gap. This p

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Cortiula, J. A. "Performance of a 2048 × 2048 Pixel Three-Side-Buttable CCD Designed for Large Focal Planes in Astronomy." Symposium - International Astronomical Union 167 (1995): 295–96. http://dx.doi.org/10.1017/s0074180900056552.

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TH78997M is a 2048 × 2048 pixel full-frame CCD sensor featuring 15 × 15 micron pixels, MPP operating mode, four parallel outputs and buttability on three sides. This new device makes it possible to build very large focal plane detectors for telescopes (two × n butted CCDs) with less than a 25 dead pixel zone between adjacent sensors. Other features are high full-well capacity (typically 180 Ke−) and very low dark current thanks to four phase MPP clocking which allows a very long exposure time together with a high S/N ratio.The readout of a complete frame is achieved through four parallel outpu

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28

Voulgari, Evgenia, François Krummenacher, and Maher Kayal. "ANTIGONE: A Programmable Energy-Efficient Current Digitizer for an ISFET Wearable Sweat Sensing System." Sensors 21, no. 6 (2021): 2074. http://dx.doi.org/10.3390/s21062074.

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This article describes the design and the characterization of the ANTIGONE (ANalog To dIGital cONvErter) ASIC (Application Specific Integrated Circuit) built in AMS 0.35 m technology for low dc-current sensing. This energy-efficient ASIC was specifically designed to interface with multiple Ion-Sensitive Field-Effect Transistors (ISFETs) and detect biomarkers like pH, Na+, K+ and Ca2+ in human sweat. The ISFET-ASIC system can allow real-time noninvasive and continuous health monitoring. The ANTIGONE ASIC architecture is based on the current-to-frequency converter through the charge balancing pr

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Fedtschenko, Tatjana, Alexander Utz, Alexander Stanitzki, et al. "A New Configurable Wireless Sensor System for Biomedical Applications with ISO 18000-3 Interface in 0.35 µm CMOS." Sensors 19, no. 19 (2019): 4110. http://dx.doi.org/10.3390/s19194110.

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This article presents a new configurable wireless sensor system. The system is used to perform amperometric measurements and send the measurement data to a handheld reader using a wireless transponder interface. The two-chip sensor system was implemented in a 0.35 μm CMOS technology. The system consists of an integrated nano-potentiostat that performs the actual measurements and an ISO 18000-3 compliant frontend that enables wireless telemetric data transmission and powering of the entire sensor system. The system was manufactured in combination with a chronoamperometric glucose sensor which a

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30

Roelse, Margriet, Ron Wehrens, Maurice Gl Henquet, Renger F. Witkamp, Robert D. Hall, and Maarten A. Jongsma. "The Effect of Calcium Buffering and Calcium Sensor Type on the Sensitivity of an Array-Based Bitter Receptor Screening Assay." Chemical Senses 44, no. 7 (2019): 497–505. http://dx.doi.org/10.1093/chemse/bjz044.

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Abstract The genetically encoded calcium sensor protein Cameleon YC3.6 has previously been applied for functional G protein–coupled receptor screening using receptor cell arrays. However, different types of sensors are available, with a wide range in [Ca2+] sensitivity, Hill coefficients, calcium binding domains, and fluorophores, which could potentially improve the performance of the assay. Here, we compared the responses of 3 structurally different calcium sensor proteins (Cameleon YC3.6, Nano140, and Twitch2B) simultaneously, on a single chip, at different cytosolic expression levels and in

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Li, Xiangyu, Jianping Hu, and Xiaowei Liu. "Study of a closed-loop high-precision front-end circuit for tunneling magneto-resistance sensors." Modern Physics Letters B 33, no. 08 (2019): 1950085. http://dx.doi.org/10.1142/s0217984919500854.

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A closed-loop high-precision front-end interface circuit in a standard 0.35 [Formula: see text]m CMOS technology for a tunneling magneto-resistance (TMR) sensor is presented in this paper. In consideration of processing a low frequency and weak geomagnetic signal, a low-noise front-end detection circuit is proposed with chopper technique to eliminate the 1/f noise and offset of operational amplifier. A novel ripple suppression loop is proposed for eliminating the ripple in a tunneling magneto-resistance sensor interface circuit. Even harmonics is eliminated by fully differential structure. The

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Li, Xiangyu, Liang Yin, Weiping Chen, Zhiqiang Gao, and Xiaowei Liu. "A high-resolution tunneling magneto-resistance sensor interface circuit." Modern Physics Letters B 31, no. 04 (2017): 1750030. http://dx.doi.org/10.1142/s0217984917500300.

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In this paper, a chopper instrumentation amplifier and a high-precision and low-noise CMOS band gap reference in a standard 0.5 [Formula: see text] CMOS technology for a tunneling magneto-resistance (TMR) sensor is presented. The noise characteristic of TMR sensor is an important factor in determining the performance of the sensor. In order to obtain a larger signal to noise ratio (SNR), the analog front-end chip ASIC weak signal readout circuit of the sensor includes the chopper instrumentation amplifier; the high-precision and low-noise CMOS band gap reference. In order to achieve the low no

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Nguyen, Van-Viet, Hyohyun Nam, Young Choe, Bok-Hyung Lee, and Jung-Dong Park. "An X-band Bi-Directional Transmit/Receive Module for a Phased Array System in 65-nm CMOS." Sensors 18, no. 8 (2018): 2569. http://dx.doi.org/10.3390/s18082569.

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We present an X-band bi-directional transmit/receive module (TRM) for a phased array system utilized in radar-based sensor systems. The proposed module, comprising a 6-bit phase shifter, a 6-bit digital step attenuator, and bi-directional gain amplifiers, is fabricated using 65-nm CMOS technology. By constructing passive networks in the phase-shifter and the variable attenuator, the implemented TRM provides amplitude and phase control with 360° phase coverage and 5.625° as the minimum step size while the attenuation range varies from 0 to 31.5 dB with a step size of 0.5 dB. The fabricated T/R

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Dalmay, Claire, Arnaud Pothier, Mathilde Cheray, Fabrice Lalloue, Marie-Odile Jauberteau, and Pierre Blondy. "Label-free RF biosensors for human cell dielectric spectroscopy." International Journal of Microwave and Wireless Technologies 1, no. 6 (2009): 497–504. http://dx.doi.org/10.1017/s1759078709990614.

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This paper presents an original biosensor chip allowing determination of intrinsic relative permittivity of biological cells at microwave frequencies. This sensor permits non-invasive cell identification and discrimination using an RF signal to probe intracellular medium of biological samples. Indeed, these sensors use an RF planar resonator that allows detection capabilities on less than 10 cells, thanks to the microscopic size of its sensitive area. Especially, measurements between 15 and 35 GHz show the ability label-free biosensors to differentiate two human cell types using their own elec

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Huang, Zhen, Jian Zhu, and Le Lu. "An AD7746-Based Data Acquisition System for Capacitive Pressure Sensor in Weather Detection Application." Key Engineering Materials 483 (June 2011): 461–64. http://dx.doi.org/10.4028/www.scientific.net/kem.483.461.

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Data acquisition system for barometric capacitive pressure sensor with high accuracy is present. The precision of the data acquisition system is less than 1fF, which improves the pressure sensor with high accuracy of 0.1hPa in the pressure range from 5hPa to 1080hPa. The data acquisition system consists of an AD7746 chip, an ATmega16 microprocessor, a 1602 LCD display and a pair of wireless modules. The capacitance data acquired by the AD7746 are transferred to a host computer using RS232 port via wireless module and display on the LCD in real-time. Preliminary results obtained from experiment

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Liu, Qi, Xue Zhong Ai, Ying Wang, and Ren Yu Liu. "Design of Pt100 Temperature Measuring System Based on System-on-Chip for C8051F410." Advanced Materials Research 382 (November 2011): 187–90. http://dx.doi.org/10.4028/www.scientific.net/amr.382.187.

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In order to reduce development costs, improve system stability and reliability, we designed high precise temperature measuring system with system-on-chip of C8051F410 as control core, using three wire constant current sources to drive Pt100 temperature sensor. The Operational principle and design basis of current source, signal conditioning and modulus convert circuits are analyzed, and also given circuit structure and circuit parameters. Experimental results show that absolute error is less than 0.15°C and accuracy level is 0.02 that can achieve real-time measure with high precisions in -50°C

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Mayer, Michael, and Andrew Zwart. "Ultrasonic Friction Power in Microelectronic Wire Bonding." Materials Science Forum 539-543 (March 2007): 3920–25. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.3920.

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An integrated sensor method is used to measure interfacial temperature profiles with an ultrasonic friction test process. The profiles are compared to numerical results obtained by a transient thermal 2D axisymmetric finite elements (FE) analysis. In the experiments, the 50 $m diameter gold balls used in wire bonding are deformed by the capillary tool during impacting on the flat surface of a silicon chip (contact zone). The deformed balls then are pressed onto the SiO2 layer on the chip and vibrated with various amplitudes of 128 kHz ultrasonics. The 52 $m diameter contact zone is surrounded

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Wang, Jin An, Zhong Liang Xia, Yan Su, Min Cong Lu, Ying Wan, and Yong He. "Handheld, One-Step, and Rapid Electrochemical Biosensor Platform with Smartphone Interface." Applied Mechanics and Materials 868 (July 2017): 340–44. http://dx.doi.org/10.4028/www.scientific.net/amm.868.340.

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Organophosphorous pesticide (OP), one of the most commonly used pesticides, could have serious adverse effects on human health and the environment. As the maximum residue limit (MRL) of OPs in food and water is low, it is in great demand to develop integrated, portable, user-friendly devices for the rapid and sensitive detection of OP residue. This work aims to present a homemade handhold device and screen printing electrode (SPE) chip for rapid, sensitive, and one-step detection of OPs. A handhold device was designed and fabricated to connect with smartphone to readout the electrochemical sig

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Eisner, Ludmila, Isabel Wilhelm, Günter Flachenecker, Jürgen Hürttlen, and Wolfgang Schade. "Molecularly Imprinted Sol-Gel for TNT Detection with Optical Micro-Ring Resonator Sensor Chips." Sensors 19, no. 18 (2019): 3909. http://dx.doi.org/10.3390/s19183909.

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A sensor for trinitrotoluene (TNT) detection was developed by using a combination of optical micro-ring technology and a receptor coating based on molecularly imprinted sol-gel layers. Two techniques for deposition of receptor layers were compared: Airbrush technology and electrospray ionization. A concentration of less than 5 ppb for TNT in the gas-phase, using electrospray deposition of the receptor layer, was detected. The cross-sensitivities to organic substances and further nitro-based explosives were compared. As a result, the sensitivity to TNT is about one order of magnitude higher in

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La Rosa, Roberto, Catherine Dehollain, and Patrizia Livreri. "Advanced Monitoring Systems Based on Battery-Less Asset Tracking Modules Energized through RF Wireless Power Transfer." Sensors 20, no. 11 (2020): 3020. http://dx.doi.org/10.3390/s20113020.

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Asset tracking involving accurate location and transportation data is highly suited to wireless sensor networks (WSNs) featuring battery-less nodes that can be deployed in virtually any environment and require little or no maintenance. In response to the growing demand for advanced battery-less sensor tag solutions, this article presents a system for identifying and monitoring the speeds of assets in a WSN with battery-less tags that receive all their operating energy through radio frequency (RF) wireless power transfer (WPT) architecture, and a unique measurement approach to generate time-dom

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Nikolic, Goran, Mile Stojcev, Zoran Stamenkovic, Goran Panic, and Branislav Petrovic. "Wireless sensor node with low-power sensing." Facta universitatis - series: Electronics and Energetics 27, no. 3 (2014): 435–53. http://dx.doi.org/10.2298/fuee1403435n.

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Wireless sensor network consists of a large number of simple sensor nodes that collect information from external environment with sensors, then process the information, and communicate with other neighboring nodes in the network. Usually, sensor nodes operate with exhaustible batteries unattended. Since manual replacement or recharging of the batteries is not an easy, desirable or always possible task, the power consumption becomes a very important issue in the development of these networks. The total power consumption of a node is a result of all steps of the operation: sensing, data processi

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Lazaro, Antonio, Marti Boada, Ramon Villarino, and David Girbau. "Color Measurement and Analysis of Fruit with a Battery-Less NFC Sensor." Sensors 19, no. 7 (2019): 1741. http://dx.doi.org/10.3390/s19071741.

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This paper presents a color-based classification system for grading the ripeness of fruit using a battery-less Near Field Communication (NFC) tag. The tag consists of a color sensor connected to a low-power microcontroller that is connected to an NFC chip. The tag is powered by the energy harvested from the magnetic field generated by a commercial smartphone used as a reader. The raw RGB color data measured by the colorimeter is converted to HSV (hue, saturation, value) color space. The hue angle and saturation are used as features for classification. Different classification algorithms are co

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Dai, Weijun, Yanni Tang, and Shijie Qiu. "Design and Implementation of an Intelligent Water Regime Detection System." MATEC Web of Conferences 267 (2019): 02014. http://dx.doi.org/10.1051/matecconf/201926702014.

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An intelligent water regime detection system was designed for water detection. In the designed system, water level is detected by a pressure sensor and water pH is detected by a pH meter. After being processed by the AD chip TLC2543, the data are sent to the MCU via serial communication and the detection result is displayed on OLED screen or Bluetooth mobile phone. The software adopts time-sharing and power-down operation modes, and combines the relay to turn on/off the MCU peripheral circuit to reduce power consumption. The measurement deviations of water level, pH, and voltage were respectiv

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Popovic Renella, Dragana, Sasa Spasic, Sasa Dimitrijevic, Marjan Blagojevic, and Radivoje S Popovic. "An overview of commercially available Teslameters for applications in modern science and industry." ACTA IMEKO 6, no. 1 (2017): 43. http://dx.doi.org/10.21014/acta_imeko.v6i1.312.

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<p>The Hall-effect based Teslameters (also called Gaussmeters) are the mostly applied instruments for measuring DC and AC magnetic flux densities in modern science and industry. This paper gives an overview of commercially available Teslameters at the high-end performance level. The Teslameters have been evaluated by following characteristics that are published by suppliers: probe dimensions, magnetic field sensitive volume, accuracy, magnetic resolution, measurement range, frequency bandwidth, temperature coefficient sensitivity, and price/performance ratio.</p><p>The Teslam

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Tremlett, Piers R. "The Tamessa project: a practical application of a 225°C multilayer PCB/SMT/COB system." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2017, HiTEN (2017): 000063–67. http://dx.doi.org/10.4071/2380-4491.2017.hiten.63.

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Abstract The Tamessa project has developed a high-temperature, multilayer, Printed Circuit Board and component assembly process that is capable of withstanding 225°C operating temperatures in a non-hermetic environment. This paper describes the practical application of this project's work to the electronic interface for a high temperature pressure sensor. The PCB used in Tamessa has been made from novel materials and the Surface Mount Technology (SMT) component attach process is a solder-less process that uses an adhesive. Additionally, the project has developed and proved a Chip on Board (COB

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Cui, Meng, and Yu Lin Qi. "Research and Design of Urban LED Street Lamp Wireless Management System." Applied Mechanics and Materials 602-605 (August 2014): 2893–96. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.2893.

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This article will Wave Mesh wireless ad-hoc network technology is applied to urban LED street lamp management system,with the single chip microcomputer 80C51F310 as the core,using real-time sensor testing environment brightness, and according to the brightness level of brightness, the LED street light illumination automatic adjustment;Aiming at the condition of the midnight staff less activity,using pyroelectric infrared human detection to control the brightness of the street lamp, the experimental data proved that energy saving effect is remarkable.The system safe and reliable, low cost,It ha

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Aranda, Jesus Javier, Sebastian Bader, and Bengt Oelmann. "Self-Powered Wireless Sensor Using a Pressure Fluctuation Energy Harvester." Sensors 21, no. 4 (2021): 1546. http://dx.doi.org/10.3390/s21041546.

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Condition monitoring devices in hydraulic systems that use batteries or require wired infrastructure have drawbacks that affect their installation, maintenance costs, and deployment flexibility. Energy harvesting technologies can serve as an alternative power supply for system loads, eliminating batteries and wiring requirements. Despite the interest in pressure fluctuation energy harvesters, few studies consider end-to-end implementations, especially for cases with low-amplitude pressure fluctuations. This generates a research gap regarding the practical amount of energy available to the load

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Lu, Jixi, Jing Wang, Ke Yang, et al. "In-Situ Measurement of Electrical-Heating-Induced Magnetic Field for an Atomic Magnetometer." Sensors 20, no. 7 (2020): 1826. http://dx.doi.org/10.3390/s20071826.

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Electrical heating elements, which are widely used to heat the vapor cell of ultrasensitive atomic magnetometers, inevitably produce a magnetic field interference. In this paper, we propose a novel measurement method of the amplitude of electrical-heating-induced magnetic field for an atomic magnetometer. In contrast to conventional methods, this method can be implemented in the atomic magnetometer itself without the need for extra magnetometers. It can distinguish between different sources of magnetic fields sensed by the atomic magnetometer, and measure the three-axis components of the magne

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T. Gadawe, Nour, and Sahar L. Qaddoori. "Design and implementation of smart traffic light controller using VHDL language." International Journal of Engineering & Technology 8, no. 4 (2019): 596. http://dx.doi.org/10.14419/ijet.v8i4.29478.

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The purpose of this paper is to design and implementation of smart traffic light controller system using VHDL language and FPGA. A structure of four road intersection has been selected. The intersection to be controlled is between a busy (main street), and somewhat less busy (side street), with sensor for the side street and walk request button. Also, the system contains switches to control the traffic light manually. The intersection uses four timing parameters with ability to change these parameters manually. The system has been successfully tested with VHDL using Xilinx ISE 14.7i software e

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Guo, Xu Hong, Li Jun Teng, Wei Wang, and Ting Ting Chen. "Study on the Cutting Properties about Magnesium Alloy when Dry Turning with Kentanium Cutting Tools." Advanced Materials Research 102-104 (March 2010): 653–57. http://dx.doi.org/10.4028/www.scientific.net/amr.102-104.653.

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In recent years, the machinability of magnesium alloy is concerned more and more by the public. In this paper, a study on the cutting properties of magnesium alloy AZ91D when dry turning with kentanium cutting tools is presented. It shows the cutting force measured by a data acquisition system which is made up of Kistler9257B piezoelectric crystal sensor dynamometer, Kistler5070A10100 charge amplifier and computer. The effect of cutting parameters on cutting force was studied, and the experimental formula was built. The tool wear and chip characteristics were observed with KYKY-EM3200 electron

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