The Experts below are selected from a list of 124878 Experts worldwide ranked by ideXlab platform

Deming Liu - One of the best experts on this subject based on the ideXlab platform.

  • Highly sensitive liquid-Level Sensor based on an optical reflective microfiber probe
    Optics Letters, 2019
    Co-Authors: Junjie Wang, Zhijun Yan, Qizhen Sun, Shijie Tan, Liuyang Yang, Fang Fang, Deming Liu
    Abstract:

    Increasing the sensitivity and miniaturizing the size of liquid-Level Sensors are crucial for confined installation space. Here we propose and demonstrate a highly sensitive liquid-Level Sensor based on a compact optical reflective microfiber probe. By tracking the resonant wavelength shift of the in-line Mach–Zehnder interferometer generated between the $ {\rm HE}_{11} $HE11 and $ {\rm HE}_{12} $HE12 modes, liquid-Level sensing can be realized. Through optimizing the structure parameters of the microfiber probe, an ultra-high sensitivity of $\sim{367.644}\;{\rm nm/mm}$∼367.644nm/mm is achieved in experiment, which is two to three orders of magnitude higher than other reported liquid-Level Sensors, to the best of our knowledge. Considering the high sensitivity and compact structure of the Sensor, it has great potential in real-time intelligent monitoring of tiny changes in the liquid Level such as small autonomous drones and micro-channels.

  • Liquid-Level Sensor Using Optical Microfiber Probe
    Conference on Lasers and Electro-Optics, 2018
    Co-Authors: Junjie Wang, Wei Zhang, Zhijun Yan, Qizhen Sun, Deming Liu
    Abstract:

    A liquid-Level Sensor using reflective optical microfiber probe as the sensing element is proposed and experimentally demonstrated. By monitoring the reflection wavelength shift, an ultrahigh liquid-Level sensitivity of ∼153.5 nm/mm is achieved.

  • highly sensitive liquid Level Sensor based on dual wavelength double ring fiber laser assisted by beat frequency interrogation
    Optics Express, 2012
    Co-Authors: Yi Dai, Qizhen Sun, Sisi Tan, Jiejun Zhang, Deming Liu
    Abstract:

    A highly sensitive liquid-Level Sensor based on dual-wavelength single-longitudinal-mode fiber laser is proposed and demonstrated. The laser is formed by exploiting two parallel arranged phase-shift fiber Bragg gratings (ps-FBGs), acting as ultra-narrow bandwidth filters, into a doublering resonators. By beating the dual-wavelength lasing output, a stable microwave signal with frequency stability better than 5 MHz is obtained. The generated beat frequency varies with the change of dual-wavelength spacing. Based on this characteristic, with one ps-FBG serving as the sensing element and the other one acting as the reference element, a highly sensitive liquid Level Sensor is realized by monitoring the beat frequency shift of the laser. The Sensor head is directly bonded to a float which can transfer buoyancy into axial strain on the fiber without introducing other elastic elements. The experimental results show that an ultra-high liquidLevel sensitivity of 2.12 × 107 MHz/m within the measurement range of 1.5 mm is achieved. The Sensor presents multiple merits including ultra-high sensitivity, thermal insensitive, good reliability and stability.

Minoru Takeda - One of the best experts on this subject based on the ideXlab platform.

  • Superconducting characteristics of short MgB2 wires of long Level Sensor for liquid hydrogen
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: Minoru Takeda, Kazuma Maekawa, Yu Matsuno, Shizuichi Fujikawa, Y. Inoue, Hiroaki Kumakura
    Abstract:

    To establish the worldwide storage and marine transport of hydrogen, it is important to develop a high-precision and long Level Sensor, such as a superconducting magnesium diboride (MgB2) Level Sensor for large liquid hydrogen (LH2) tanks on board ships. Three 1.7- m-long MgB2 wires were fabricated by an in situ method, and the superconducting characteristics of twenty-four 20-mm-long MgB2 wires on the 1.7-m-long wires were studied. In addition, the static Level-detecting characteristics of five 500-mm-long MgB2 Level Sensors were evaluated under atmospheric pressure.

  • Fundamental study of tank with MgB2 Level Sensor for transportation of liquid hydrogen
    Physics Procedia, 2015
    Co-Authors: Kazuma Maekawa, Yu Matsuno, Shizuichi Fujikawa, Minoru Takeda, Tsuneo Kuroda, Hiroaki Kumakura
    Abstract:

    We are currently developing an external-heating-type superconducting magnesium diboride (MgB2) Level Sensor for a liquid hydrogen (LH2) tank. The aim of this study is to investigate the measuring current dependence of the Level-detecting characteristics of the MgB2 Level Sensor for LH2 under a static condition which has not yet been clarified. It was found that the linear correlation coefficient was 0.99 or more, indicating high linearity, regardless of the measuring current at heater inputs of 3 W and 6 W. Moreover, there was no effect of self-heating by the measuring current and it was found that a current of up to 100 mA can be used.

  • application of rm mgb _ 2 wire to liquid hydrogen Level Sensor external heating type rm mgb _ 2 Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

  • Application of ${\rm MgB}_{2}$ Wire to Liquid Hydrogen Level Sensor—External-Heating-Type ${\rm MgB}_{2}$ Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

C Kazama - One of the best experts on this subject based on the ideXlab platform.

  • application of rm mgb _ 2 wire to liquid hydrogen Level Sensor external heating type rm mgb _ 2 Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

  • Application of ${\rm MgB}_{2}$ Wire to Liquid Hydrogen Level Sensor—External-Heating-Type ${\rm MgB}_{2}$ Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

Hiroaki Kumakura - One of the best experts on this subject based on the ideXlab platform.

  • Superconducting characteristics of short MgB2 wires of long Level Sensor for liquid hydrogen
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: Minoru Takeda, Kazuma Maekawa, Yu Matsuno, Shizuichi Fujikawa, Y. Inoue, Hiroaki Kumakura
    Abstract:

    To establish the worldwide storage and marine transport of hydrogen, it is important to develop a high-precision and long Level Sensor, such as a superconducting magnesium diboride (MgB2) Level Sensor for large liquid hydrogen (LH2) tanks on board ships. Three 1.7- m-long MgB2 wires were fabricated by an in situ method, and the superconducting characteristics of twenty-four 20-mm-long MgB2 wires on the 1.7-m-long wires were studied. In addition, the static Level-detecting characteristics of five 500-mm-long MgB2 Level Sensors were evaluated under atmospheric pressure.

  • Fundamental study of tank with MgB2 Level Sensor for transportation of liquid hydrogen
    Physics Procedia, 2015
    Co-Authors: Kazuma Maekawa, Yu Matsuno, Shizuichi Fujikawa, Minoru Takeda, Tsuneo Kuroda, Hiroaki Kumakura
    Abstract:

    We are currently developing an external-heating-type superconducting magnesium diboride (MgB2) Level Sensor for a liquid hydrogen (LH2) tank. The aim of this study is to investigate the measuring current dependence of the Level-detecting characteristics of the MgB2 Level Sensor for LH2 under a static condition which has not yet been clarified. It was found that the linear correlation coefficient was 0.99 or more, indicating high linearity, regardless of the measuring current at heater inputs of 3 W and 6 W. Moreover, there was no effect of self-heating by the measuring current and it was found that a current of up to 100 mA can be used.

  • application of rm mgb _ 2 wire to liquid hydrogen Level Sensor external heating type rm mgb _ 2 Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

  • Application of ${\rm MgB}_{2}$ Wire to Liquid Hydrogen Level Sensor—External-Heating-Type ${\rm MgB}_{2}$ Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

Yu Matsuno - One of the best experts on this subject based on the ideXlab platform.

  • Superconducting characteristics of short MgB2 wires of long Level Sensor for liquid hydrogen
    IOP Conference Series: Materials Science and Engineering, 2015
    Co-Authors: Minoru Takeda, Kazuma Maekawa, Yu Matsuno, Shizuichi Fujikawa, Y. Inoue, Hiroaki Kumakura
    Abstract:

    To establish the worldwide storage and marine transport of hydrogen, it is important to develop a high-precision and long Level Sensor, such as a superconducting magnesium diboride (MgB2) Level Sensor for large liquid hydrogen (LH2) tanks on board ships. Three 1.7- m-long MgB2 wires were fabricated by an in situ method, and the superconducting characteristics of twenty-four 20-mm-long MgB2 wires on the 1.7-m-long wires were studied. In addition, the static Level-detecting characteristics of five 500-mm-long MgB2 Level Sensors were evaluated under atmospheric pressure.

  • Fundamental study of tank with MgB2 Level Sensor for transportation of liquid hydrogen
    Physics Procedia, 2015
    Co-Authors: Kazuma Maekawa, Yu Matsuno, Shizuichi Fujikawa, Minoru Takeda, Tsuneo Kuroda, Hiroaki Kumakura
    Abstract:

    We are currently developing an external-heating-type superconducting magnesium diboride (MgB2) Level Sensor for a liquid hydrogen (LH2) tank. The aim of this study is to investigate the measuring current dependence of the Level-detecting characteristics of the MgB2 Level Sensor for LH2 under a static condition which has not yet been clarified. It was found that the linear correlation coefficient was 0.99 or more, indicating high linearity, regardless of the measuring current at heater inputs of 3 W and 6 W. Moreover, there was no effect of self-heating by the measuring current and it was found that a current of up to 100 mA can be used.

  • application of rm mgb _ 2 wire to liquid hydrogen Level Sensor external heating type rm mgb _ 2 Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.

  • Application of ${\rm MgB}_{2}$ Wire to Liquid Hydrogen Level Sensor—External-Heating-Type ${\rm MgB}_{2}$ Level Sensor
    IEEE Transactions on Applied Superconductivity, 2009
    Co-Authors: Minoru Takeda, Yu Matsuno, Hiroaki Kumakura, Itaru Kodama, C Kazama
    Abstract:

    A superconducting magnesium diboride (MgB2) Level Sensor for liquid hydrogen has been timely noted as a new Sensor from a viewpoint of the worldwide storage and transport of large quantities of hydrogen. The external-heating-type Level Sensors (200 and 800 mm long) based on MgB2 wires are fabricated by an in situ method, and their Level-detecting characteristics are studied in comparison with the actual liquid Level using the liquid hydrogen experiment facility (LHEF). It becomes evident that an external-heating-type MgB2 Level Sensor has a high linearity, a small measurement error, and a good reproducibility even in the pressure range of up to 200 kPaG despite the evaporation loss caused by the heater used.