Research and Development of Fiber L2F

光纤L2F的研发

基本信息

  • 批准号:
    02555041
  • 负责人:
  • 金额:
    $ 2.94万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
  • 财政年份:
    1990
  • 资助国家:
    日本
  • 起止时间:
    1990 至 1991
  • 项目状态:
    已结题

项目摘要

A new type laser-2-focus velocimeter (L2F) was developed to materialize a small size, a low price and an easier operation. An optical system and a signal processing system based on an optical fiber or based on a diode laser were designed and were built up. The design specifications of new systems were tested applying to a flow measurement in a wind tunnel or in a rotating impeller.At the first step, a fiber L2F with an optical fiber of 8 m in length used between the laser source and the optical head was developed. The size of the fiber L2F was reduced to a half in weight and a third in volume compared with the original L2F. The optical S/N ratio of the fiber L2F was not deteriorated for application to a flow measurement in a rotating impeller, when the optical shutter was installed ahead of the optical fiber according to the behavior of polarized light in an optical fiber.At the second step, a diode L2F with a transmitter optics of 48 mm in diameter and of 120 mm of measuring distance … More was developed, the size of which is 324 mm in length, 98 mm in width and 140 mm in height, and the weight is 5kg. A diode laser of 840 mm in wave length was used as a light source, and the scattered light from a particles was detected using an avalanche photodiode. An electric amplifier was designed with high sensitivity against the diode laser. The measuring volume of the diode L2F was measured using a fine wier of 5 mum in diameter with a mechanical traversing system.It was possible to make a flow measurement at I mm close to the bottom wall even when the laser beam was inserted into a small-sized wind tunnel normal to the wall, and this confirmed a high S/N ratio of the diode L2F system. In the case of low turbulence flow, the maximum sampling rate was 2kHz and the probability of a particle traveling through the two foci was beyond 80 percent so that a measuring time was reduced significantly by narrowing the distance between the two foci to 0.1 mm. Velocity distribution in a two-dimensional wake behind a circular cylinder was measured. The diode L2F was applicable to a flow measurement even in a high turbulence flow with 20 % in transverse turbulence intensity. Less
为了实现小型化、低成本、操作方便的特点,研制了一种新型激光双焦点测速仪(L2 F)。设计并搭建了基于光纤和半导体激光器的光学系统和信号处理系统。在风洞或旋转叶轮的流量测量中,对新系统的设计指标进行了测试。第一步,开发了在激光源和光学头之间使用的光纤长度为8 m的光纤L2 F。与原始L2 F相比,纤维L2 F的尺寸在重量上减小到一半,在体积上减小到三分之一。当根据光纤中偏振光的特性将光闸安装在光纤前面时,光纤L2 F的光学S/N比对于应用于旋转叶轮中的流量测量没有恶化。 ...更多信息 研制了长324 mm、宽98 mm、高140 mm、重5 kg的微型微型电动自行车。使用波长为840 mm的二极管激光器作为光源,并且使用雪崩光电二极管检测来自颗粒的散射光。设计了一种对半导体激光器具有高灵敏度的电子放大器。二极管L2 F的测量体积是用一个直径为5 μ m的细线和一个机械横移系统测量的,即使当激光束垂直于壁插入一个小型风洞时,也可以在靠近底壁1 mm处进行流量测量,这证实了二极管L2 F系统的高S/N比。在低湍流度情况下,最大采样率为2kHz,粒子穿过两焦点的概率超过80%,从而通过将两焦点之间的距离缩窄到0.1mm而显著缩短了测量时间。即使在横向湍流强度为20%的高湍流流中,二极管L2 F也适用于流量测量。少

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

HAYAMI Hiroshi其他文献

HAYAMI Hiroshi的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('HAYAMI Hiroshi', 18)}}的其他基金

Development of an Advanced PIV System for Full-Field Flow Measurement
开发用于全场流量测量的先进 PIV 系统
  • 批准号:
    14205031
  • 财政年份:
    2002
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
PIV Measurement of Shock Waves in a Transonic Centrifugal Compressor
跨音速离心压缩机中冲击波的 PIV 测量
  • 批准号:
    11650178
  • 财政年份:
    1999
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Surging and Stall in a High-Pressure-Ratio Centrifugal Compressor
高压比离心压缩机中的喘振和失速
  • 批准号:
    09650194
  • 财政年份:
    1997
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

相似国自然基金

基于激光与管电极电解同步复合(Laser-STEM)的低损伤大深度小孔加工技术基础研究
  • 批准号:
    51905525
  • 批准年份:
    2019
  • 资助金额:
    26.0 万元
  • 项目类别:
    青年科学基金项目
长链非编码RNA lnc-LASER通过HNF-1α-PCSK9 调控肝脏胆固醇平衡的机制研究
  • 批准号:
    81600343
  • 批准年份:
    2016
  • 资助金额:
    17.5 万元
  • 项目类别:
    青年科学基金项目

相似海外基金

System for 3D femtosecond laser-based micromachining
基于飞秒激光的 3D 微加工系统
  • 批准号:
    537273289
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Major Research Instrumentation
High-power Ytterbium femtosecond laser amplifier system
高功率镱飞秒激光放大器系统
  • 批准号:
    532577495
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Major Research Instrumentation
Freeform Silica Fibre Optics via Ultrafast Laser Manufacturing
通过超快激光制造的自由形状石英光纤
  • 批准号:
    MR/X034615/1
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Fellowship
CAREER: Understanding Processing-Structure-Property Relationships in Co-Axial Wire-Feed, Powder-Feed Laser Directed Energy Deposition
职业:了解同轴送丝、送粉激光定向能量沉积中的加工-结构-性能关系
  • 批准号:
    2338951
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Standard Grant
I-Corps: Translation potential of 3D electronics manufacturing by integrated 3D printing and freeform laser induction
I-Corps:通过集成 3D 打印和自由形式激光感应实现 3D 电子制造的转化潜力
  • 批准号:
    2412186
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Standard Grant
Microscale radiography of hydrodynamic instabilities mitigation in magnetized high-density laser plasmas
磁化高密度激光等离子体中流体动力学不稳定性缓解的微尺度射线照相
  • 批准号:
    24K06988
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
CAREER: Operating an Optical Atomic Clock Beyond the Laser Coherence and below the Projection Limit
职业:操作超出激光相干性且低于投影极限的光学原子钟
  • 批准号:
    2339487
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Continuing Grant
EAGER: IMPRESS-U: Gradient surface nanostructuring with short laser pulses
EAGER:IMPRESS-U:使用短激光脉冲进行梯度表面纳米结构
  • 批准号:
    2406599
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Standard Grant
Collaborative Research: Robust and miniature laser with tailorable single-mode operation range
合作研究:具有可定制单模工作范围的坚固微型激光器
  • 批准号:
    2411394
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Standard Grant
Vision Servoing Based Micro Continuum Robot Actuated by SMA Wires for Precise Laser Irradiation during Transurethral Lithotripsy
基于视觉伺服的微型连续体机器人由 SMA 线驱动,用于经尿道碎石术期间的精确激光照射
  • 批准号:
    24K21116
  • 财政年份:
    2024
  • 资助金额:
    $ 2.94万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了