The Experts below are selected from a list of 3642 Experts worldwide ranked by ideXlab platform

Zude Zhou - One of the best experts on this subject based on the ideXlab platform.

  • String-type based two-dimensional fiber bragg grating vibration Sensing Principle and structure optimization
    Sensors and Actuators A: Physical, 2017
    Co-Authors: Tianliang Li, Yuegang Tan, Zude Zhou
    Abstract:

    Vibration is a common phenomenon in the field of engineering, and it typically carries affluent and essential faulty information on health conditions of measured targets. Consequently, it is crucial to ensure safe and stable operations of engineering equipment through the use of effective vibration detection technologies. The increasingly and extensively advanced requirements for vibration detection make it essential to realize real-time multi-dimensional vibration information. To this end, a string-type two-dimensional (2D) fiber Bragg grating (FBG) vibration sensor has been presented through the use of both axial and transverse properties of a tightly suspended optical fiber. This sensor employs a novel mass block structure that possesses a specially designed hole pattern and introduces two stiffening beams through them to enhance the dynamic properties and remove the coupled rotational interference. The Sensing Principle and the proposed guidelines of cross-interference elimination have been validated by the simulation and experimental results. With the configuration of two stiffening beams, the working bandwidth of the proposed sensor has been enlarged to be respectively 10–150 Hz and 10–800 Hz along the x and y direction, which were consistent with both theoretical and simulation results. The rotational interference in the x direction has been significantly reduced to 15.3%. However, its complete removal requires a strict fabrication requirement and a bulky sensor size for this design. To further remove the interference and make the sensor compact, an optimized mass structure has been proposed to achieve almost complete removal of the rotational interference in the x direction.

Tianliang Li - One of the best experts on this subject based on the ideXlab platform.

  • String-type based two-dimensional fiber bragg grating vibration Sensing Principle and structure optimization
    Sensors and Actuators A: Physical, 2017
    Co-Authors: Tianliang Li, Yuegang Tan, Zude Zhou
    Abstract:

    Vibration is a common phenomenon in the field of engineering, and it typically carries affluent and essential faulty information on health conditions of measured targets. Consequently, it is crucial to ensure safe and stable operations of engineering equipment through the use of effective vibration detection technologies. The increasingly and extensively advanced requirements for vibration detection make it essential to realize real-time multi-dimensional vibration information. To this end, a string-type two-dimensional (2D) fiber Bragg grating (FBG) vibration sensor has been presented through the use of both axial and transverse properties of a tightly suspended optical fiber. This sensor employs a novel mass block structure that possesses a specially designed hole pattern and introduces two stiffening beams through them to enhance the dynamic properties and remove the coupled rotational interference. The Sensing Principle and the proposed guidelines of cross-interference elimination have been validated by the simulation and experimental results. With the configuration of two stiffening beams, the working bandwidth of the proposed sensor has been enlarged to be respectively 10–150 Hz and 10–800 Hz along the x and y direction, which were consistent with both theoretical and simulation results. The rotational interference in the x direction has been significantly reduced to 15.3%. However, its complete removal requires a strict fabrication requirement and a bulky sensor size for this design. To further remove the interference and make the sensor compact, an optimized mass structure has been proposed to achieve almost complete removal of the rotational interference in the x direction.

K. Fujishama - One of the best experts on this subject based on the ideXlab platform.

  • A divided/shared bit-line Sensing scheme for ULSI DRAM cores
    IEEE Journal of Solid-State Circuits, 1991
    Co-Authors: H. Hidaka, Yoshio Matsuda, K. Fujishama
    Abstract:

    A new dynamic RAM (DRAM) signal Sensing Principle, a divided/shared bit-line (DSB) Sensing scheme, is proposed. This Sensing scheme provides folded bit-line Sensing operation in a crosspoint-type memory cell array. The DSB scheme offers a high-density DRAM memory core with the common-mode array noise eliminated. A bit-line architecture based on this new Sensing Principle and its operation are demonstrated. A divided/pausing bit-line Sensing (DIPS) scheme, which is an application of this DSB Principle to the conventional folded bit-line type of memory cell arrangement, is also proposed. The DIPS architecture achieves complete pausing states for alternate bit lines throughout the active period. These alternate pausing bit lines shield the inter-bit-line coupling noise between active bit lines. Here the inter-bit-line coupling noise is eliminated by a slight architectural change to the conventional folded bit-line memory cell array. These new memory core design alternatives provide high-density DRAM memory cores suitable for the 64-Mb level and beyond. with the memory array noise reduced significantly.

Hendrik Emons - One of the best experts on this subject based on the ideXlab platform.

  • voltohmmetry a novel Sensing Principle for heavy metal determination in aqueous solutions
    Sensors and Actuators B-chemical, 2001
    Co-Authors: Michael J Schoning, Bettina Hullenkremer, O Gluck, H Luth, Hendrik Emons
    Abstract:

    Abstract The lateral resistance of a thin metal film depends on the presence or absence of interacting species at its surface. This phenomenon has been investigated regarding possible analytical applications for the determination of heavy metals in aqueous solutions. Therefore, microstructured polycrystalline metal electrodes of gold (film thickness∼20 nm) were fabricated by silicon planar technology and their resistance–potential behaviour was measured during the electrochemical deposition and dissolution of selected heavy metals, such as Cd, Pb, Ni, Tl and Zn. The deposition causes an increase of the dc resistance of the thin layer electrode, and the subsequent dissolution of the deposited heavy metal species decreases the resistance to its initial value. Since both processes have been registered in dependence of the applied electrode potential, we introduce this Sensing Principle as voltohmmetry .

  • Voltohmmetry — a novel Sensing Principle for heavy metal determination in aqueous solutions
    Sensors and Actuators B-chemical, 2001
    Co-Authors: Michael J Schoning, Bettina Hullenkremer, O Gluck, H Luth, Hendrik Emons
    Abstract:

    Abstract The lateral resistance of a thin metal film depends on the presence or absence of interacting species at its surface. This phenomenon has been investigated regarding possible analytical applications for the determination of heavy metals in aqueous solutions. Therefore, microstructured polycrystalline metal electrodes of gold (film thickness∼20 nm) were fabricated by silicon planar technology and their resistance–potential behaviour was measured during the electrochemical deposition and dissolution of selected heavy metals, such as Cd, Pb, Ni, Tl and Zn. The deposition causes an increase of the dc resistance of the thin layer electrode, and the subsequent dissolution of the deposited heavy metal species decreases the resistance to its initial value. Since both processes have been registered in dependence of the applied electrode potential, we introduce this Sensing Principle as voltohmmetry.

H. Hidaka - One of the best experts on this subject based on the ideXlab platform.

  • A divided/shared bit-line Sensing scheme for ULSI DRAM cores
    IEEE Journal of Solid-State Circuits, 1991
    Co-Authors: H. Hidaka, Yoshio Matsuda, K. Fujishama
    Abstract:

    A new dynamic RAM (DRAM) signal Sensing Principle, a divided/shared bit-line (DSB) Sensing scheme, is proposed. This Sensing scheme provides folded bit-line Sensing operation in a crosspoint-type memory cell array. The DSB scheme offers a high-density DRAM memory core with the common-mode array noise eliminated. A bit-line architecture based on this new Sensing Principle and its operation are demonstrated. A divided/pausing bit-line Sensing (DIPS) scheme, which is an application of this DSB Principle to the conventional folded bit-line type of memory cell arrangement, is also proposed. The DIPS architecture achieves complete pausing states for alternate bit lines throughout the active period. These alternate pausing bit lines shield the inter-bit-line coupling noise between active bit lines. Here the inter-bit-line coupling noise is eliminated by a slight architectural change to the conventional folded bit-line memory cell array. These new memory core design alternatives provide high-density DRAM memory cores suitable for the 64-Mb level and beyond. with the memory array noise reduced significantly.

  • A divided/shared bitline Sensing scheme for 64 Mb DRAM core
    Digest of Technical Papers. 1990 Symposium on VLSI Circuits, 1990
    Co-Authors: H. Hidaka, Yoshio Matsuda, K. Fujishima
    Abstract:

    New high-density DRAM core designs based on a new divided bitline Sensing Principle are proposed and their performance is estimated. These designs can achieve a high-density memory cell array and can also overcome problems of the scaled memory array. These designs are promising candidates for 64-Mb DRAM and beyond