The Experts below are selected from a list of 37563 Experts worldwide ranked by ideXlab platform
Michael J. Schöning - One of the best experts on this subject based on the ideXlab platform.
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laps card a novel Chip card based light addressable potentiometric Sensor laps
Sensors and Actuators B-chemical, 2006Co-Authors: Torsten Wagner, Tatsuo Yoshinobu, C Rao, Joachim P Kloock, R Otto, M Keusgen, Michael J. SchöningAbstract:Abstract A novel design of a light-addressable potentiometric Sensor (LAPS) for the realisation of an easy exchangeable and modular measurement set-up is presented in this work. The Sensor Chip for up to 16 independent Sensor spots is integrated in a standard plastic card and the appropriate measurement cell allows a selection of different Chip cards within seconds. The measurement cell contains an integrated electronic to control the measurement procedure and to read out the measurement signal from the LAPS-Chip card to provide a stable signal for further data acquisition. This guarantees a high flexibility due to the use of different Chip cards with the same measurement device on the one hand, and a high statistical prediction, because of the repeatable measurements with different Sensor-Chip cards of the same series under exact the same environmental conditions, on the other hand. Both the design and first measurements with this “LAPS cards” will be presented.
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all in one solid state device based on a light addressable potentiometric Sensor platform
Sensors and Actuators B-chemical, 2006Co-Authors: Torsten Wagner, Tatsuo Yoshinobu, C Rao, R Otto, Michael J. SchöningAbstract:A miniaturised 16-channel LAPS device together with a control and measurement software was developed. The Sensor Chip, the IR-LED array and the electronic unit are accommodated in a small cylinder, which can be directly filled with the solution to be investigated. By modifying the measuring spots with various ion-selective membranes, this device can measure the concentrations of up to 16 different ions in parallel. The individual behaviour of each Sensor spot is investigated separately by dynamically varying the analyte composition, by modifying the distance of the 16 LEDs to the Sensor Chip, and by means of IR long-time exposure pictures.
Torsten Wagner - One of the best experts on this subject based on the ideXlab platform.
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laps card a novel Chip card based light addressable potentiometric Sensor laps
Sensors and Actuators B-chemical, 2006Co-Authors: Torsten Wagner, Tatsuo Yoshinobu, C Rao, Joachim P Kloock, R Otto, M Keusgen, Michael J. SchöningAbstract:Abstract A novel design of a light-addressable potentiometric Sensor (LAPS) for the realisation of an easy exchangeable and modular measurement set-up is presented in this work. The Sensor Chip for up to 16 independent Sensor spots is integrated in a standard plastic card and the appropriate measurement cell allows a selection of different Chip cards within seconds. The measurement cell contains an integrated electronic to control the measurement procedure and to read out the measurement signal from the LAPS-Chip card to provide a stable signal for further data acquisition. This guarantees a high flexibility due to the use of different Chip cards with the same measurement device on the one hand, and a high statistical prediction, because of the repeatable measurements with different Sensor-Chip cards of the same series under exact the same environmental conditions, on the other hand. Both the design and first measurements with this “LAPS cards” will be presented.
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all in one solid state device based on a light addressable potentiometric Sensor platform
Sensors and Actuators B-chemical, 2006Co-Authors: Torsten Wagner, Tatsuo Yoshinobu, C Rao, R Otto, Michael J. SchöningAbstract:A miniaturised 16-channel LAPS device together with a control and measurement software was developed. The Sensor Chip, the IR-LED array and the electronic unit are accommodated in a small cylinder, which can be directly filled with the solution to be investigated. By modifying the measuring spots with various ion-selective membranes, this device can measure the concentrations of up to 16 different ions in parallel. The individual behaviour of each Sensor spot is investigated separately by dynamically varying the analyte composition, by modifying the distance of the 16 LEDs to the Sensor Chip, and by means of IR long-time exposure pictures.
Tatsuo Yoshinobu - One of the best experts on this subject based on the ideXlab platform.
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laps card a novel Chip card based light addressable potentiometric Sensor laps
Sensors and Actuators B-chemical, 2006Co-Authors: Torsten Wagner, Tatsuo Yoshinobu, C Rao, Joachim P Kloock, R Otto, M Keusgen, Michael J. SchöningAbstract:Abstract A novel design of a light-addressable potentiometric Sensor (LAPS) for the realisation of an easy exchangeable and modular measurement set-up is presented in this work. The Sensor Chip for up to 16 independent Sensor spots is integrated in a standard plastic card and the appropriate measurement cell allows a selection of different Chip cards within seconds. The measurement cell contains an integrated electronic to control the measurement procedure and to read out the measurement signal from the LAPS-Chip card to provide a stable signal for further data acquisition. This guarantees a high flexibility due to the use of different Chip cards with the same measurement device on the one hand, and a high statistical prediction, because of the repeatable measurements with different Sensor-Chip cards of the same series under exact the same environmental conditions, on the other hand. Both the design and first measurements with this “LAPS cards” will be presented.
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all in one solid state device based on a light addressable potentiometric Sensor platform
Sensors and Actuators B-chemical, 2006Co-Authors: Torsten Wagner, Tatsuo Yoshinobu, C Rao, R Otto, Michael J. SchöningAbstract:A miniaturised 16-channel LAPS device together with a control and measurement software was developed. The Sensor Chip, the IR-LED array and the electronic unit are accommodated in a small cylinder, which can be directly filled with the solution to be investigated. By modifying the measuring spots with various ion-selective membranes, this device can measure the concentrations of up to 16 different ions in parallel. The individual behaviour of each Sensor spot is investigated separately by dynamically varying the analyte composition, by modifying the distance of the 16 LEDs to the Sensor Chip, and by means of IR long-time exposure pictures.
Yulong Zhao - One of the best experts on this subject based on the ideXlab platform.
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Design and Performance Test of an Ocean Turbulent Kinetic Energy Dissipation Rate Measurement Probe.
Micromachines, 2018Co-Authors: Bian Tian, Yulong Zhao, Pei Chen, Hua Yang, Dalei SongAbstract:Ocean turbulent kinetic energy dissipation rate is an essential parameter in marine environmental monitoring. Numerous probes have been designed to measure the turbulent kinetic energy dissipation rate in the past, and most of them utilize piezoelectric ceramics as the sensing element. In this paper, an ocean turbulent kinetic energy dissipation rate measurement probe utilizing a microelectromechanical systems (MEMS) piezoresistor as the sensing element has been designed and tested. The triangle cantilever beam and piezoresistive Sensor Chip are the core components of the designed probe. The triangle cantilever beam acts as a velocity-force signal transfer element, the piezoresistive Sensor Chip acts as a force-electrical signal transfer element, and the piezoresistive Sensor Chip is bonded on the triangle cantilever beam. One end of the triangle cantilever beam is a nylon sensing head which contacts with fluid directly, and the other end of it is a printed circuit board which processes the electrical signal. A finite element method has been used to study the effect of the cantilever beam on probe performance. The Taguchi optimization methodology is applied to optimize the structure parameters of the cantilever beam. An orthogonal array, signal-to-noise ratio, and analysis of variance are studied to analyze the effect of these parameters. Through the use of the designed probe, we can acquire the fluid flow velocity, and to obtain the ocean turbulent dissipation rate, an attached signal processing system has been designed. To verify the performance of the designed probe, tests in the laboratory and in the Bohai Sea are designed and implemented. The test results show that the designed probe has a measurement range of 10−8–10−4 W/kg and a sensitivity of 3.91 × 10−4 (Vms2)/kg. The power spectrum calculated from the measured velocities shows good agreement with the Nasmyth spectrum. The comparative analysis between the designed probe in this paper and the commonly used PNS probe has also been completed. The designed probe can be a strong candidate in marine environmental monitoring.
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Design and Performance Test of an Ocean Turbulent Kinetic Energy Dissipation Rate Measurement Probe
MDPI AG, 2018Co-Authors: Bian Tian, Yulong Zhao, Pei Chen, Hua Yang, Dalei SongAbstract:Ocean turbulent kinetic energy dissipation rate is an essential parameter in marine environmental monitoring. Numerous probes have been designed to measure the turbulent kinetic energy dissipation rate in the past, and most of them utilize piezoelectric ceramics as the sensing element. In this paper, an ocean turbulent kinetic energy dissipation rate measurement probe utilizing a microelectromechanical systems (MEMS) piezoresistor as the sensing element has been designed and tested. The triangle cantilever beam and piezoresistive Sensor Chip are the core components of the designed probe. The triangle cantilever beam acts as a velocity-force signal transfer element, the piezoresistive Sensor Chip acts as a force-electrical signal transfer element, and the piezoresistive Sensor Chip is bonded on the triangle cantilever beam. One end of the triangle cantilever beam is a nylon sensing head which contacts with fluid directly, and the other end of it is a printed circuit board which processes the electrical signal. A finite element method has been used to study the effect of the cantilever beam on probe performance. The Taguchi optimization methodology is applied to optimize the structure parameters of the cantilever beam. An orthogonal array, signal-to-noise ratio, and analysis of variance are studied to analyze the effect of these parameters. Through the use of the designed probe, we can acquire the fluid flow velocity, and to obtain the ocean turbulent dissipation rate, an attached signal processing system has been designed. To verify the performance of the designed probe, tests in the laboratory and in the Bohai Sea are designed and implemented. The test results show that the designed probe has a measurement range of 10−8–10−4 W/kg and a sensitivity of 3.91 × 10−4 (Vms2)/kg. The power spectrum calculated from the measured velocities shows good agreement with the Nasmyth spectrum. The comparative analysis between the designed probe in this paper and the commonly used PNS probe has also been completed. The designed probe can be a strong candidate in marine environmental monitoring
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a high sensitive pressure Sensor with the novel bossed diaphragm combined with peninsula island structure
Sensors and Actuators A-physical, 2016Co-Authors: Libo Zhao, Zhuangde Jiang, Xin Guo, Jianjun Ding, Wei Xiang, Yulong ZhaoAbstract:Abstract A Micro Electromechanical Systems (MEMS) piezoresistive pressure Sensor Chip with high sensitivity has been developed to measure the ultra-low pressure of several mbar. A novel bossed diaphragm combined with peninsula-island structure is designed. The proposed diaphragm can alleviate the trade-off between sensitivity and non-linearity to realize the measurement of ultra-low pressure with low non-linearity. Especially, the strain energy dissipating outside the stress concentration region (SCR) is reduced remarkably by the proposed diaphragm to achieve high sensitivity. The optimization process for the proposed diaphragm has been presented by finite element method (FEM) to make the Sensor Chip achieve a higher sensitivity and a lower non-linearity. A fabricated pressure Sensor was packaged with the proposed Sensor Chip and tested to obtain the sensitivity of 0.066 mV/V/Pa and non-linearity of 0.33%FS in the working range of 0–500 Pa. The proposed Sensor Chip is potentially a better choice for high sensitive pressure Sensor.
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design optimization of high pressure and high temperature piezoresistive pressure Sensor for high sensitivity
Review of Scientific Instruments, 2014Co-Authors: Yulong Zhao, Bian TianAbstract:This paper describes a design method for optimizing sensitivity of piezoresistive pressure Sensor in high-pressure and high-temperature environment. In order to prove the method, a piezoresistive pressure Sensor (HPTSS) is designed. With the purpose of increasing sensitivity and to improve the measurement range, the piezoresistive Sensor adopts rectangular membrane and thick film structure. The configuration of piezoresistors is arranged according to the characteristic of the rectangular membrane. The structure and configuration of the Sensor Chip are analyzed theoretically and simulated by the finite element method. This design enables the Sensor Chip to operate in high pressure condition (such as 150 MPa) with a high sensitivity and accuracy. The silicon on insulator wafer is selected to guarantee the thermo stability of the Sensor Chip. In order to optimize the fabrication and improve the yield of production, an electric conduction step is devised. Series of experiments demonstrates a favorable linearity of 0.13% and a high accuracy of 0.48%. And the sensitivity of HTPSS is about six times as high as a conventional square-membrane Sensor Chip in the experiment. Compared with the square-membrane pressure Sensor and current production, the strength of HPTTS lies in sensitivity and measurement. The performance of the HPTSS indicates that it could be an ideal candidate for high-pressure and high-temperature sensing in real application.
Wonchan Kim - One of the best experts on this subject based on the ideXlab platform.
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A 600-dpi capacitive fingerprint Sensor Chip and image-synthesis technique
IEEE Journal of Solid-State Circuits, 1999Co-Authors: Jeong Woo Lee, Dong-jin Min, Jiyoun Kim, Wonchan KimAbstract:This paper examines the possibility of a low-cost, high-resolution fingerprint Sensor Chip. The test Chip is composed of 64×256 sensing cells (Chip size: 2.7×10.8 mm2). A new detection circuit of charge sharing is proposed, which eliminates the influences of internal parasitic capacitances. Thus, the reduced sensing-capacitor size enables a high resolution of 600 dpi, even using a conventional 0.6 μm CMOS process. The partial fingerprint images captured are synthesized into a full fingerprint image with an image-synthesis algorithm. The problems and possibilities of this image-synthesis technique are also analyzed and discussed
