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Development of an Automatic Line Scale Measuring Instrument

机译:全自动线刻度测量仪的研制

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摘要

Line scales such as engineering rules and steel tapes are still used for many routine measurements despite the existence of more sophisticated devices. MSLNZ's Automatic Line Scale Measuring Instrument is based on a heterodyne laser interferometer used in a configuration that compensates for Abbe errors. The position of each scale graduation is detected by monitoring the change in the diffuse reflection of a focused line of diode laser light, as a motorised trolley travels along above the scale. The signal from the diffuse reflection is used to trigger the laser measurement system at the edge of each graduation. The instrument is capable of measuring the position of every graduation on a rigid scale up to four metres in length with an uncertainty of [(10μm)~2 +(7.5xl0~(-6)L)~2]~(1/2) (95% confidence level). Measurement time (after set up) for a one-metre scale is less than 2 minutes.
机译:尽管存在更复杂的设备,但工程尺和钢带等线秤仍用于许多常规测量。 MSLNZ的自动线刻度测量仪基于外差激光干涉仪,其配置用于补偿阿贝误差。当电动手推车沿秤上方行驶时,通过监视二极管激光聚焦线的漫反射变化来检测每个秤刻度的位置。来自漫反射的信号用于在每个刻度的边缘触发激光测量系统。该仪器能够以长达4米的刚性刻度测量每个刻度的位置,不确定度为[(10μm)〜2 +(7.5xl0〜(-6)L)〜2]〜(1/2 )(95%的置信度)。一米秤的测量时间(设置后)少于2分钟。

著录项

  • 来源
    《》|2001年|p.112-119|共8页
  • 会议地点 Munich(DE)
  • 作者

    E.F Howick; C.M. Sutton;

  • 作者单位

    Measurement Standards Laboratory of New Zealand, Industrial Research PO Box 31-310, Lower Hutt, New Zealand;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 力学;
  • 关键词

    line scales; laser interferometer;

    机译:线刻度;激光干涉仪;

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