圧力計の直線性のみを利用した音速ノズルの高精度相対校正法 Simplified Method to Calibrate a Critical Nozzle by Utilizing the Linearity of a Pressure Gauge

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A new method to calibrate a critical nozzle against the other two, which have been already calibrated, was developed. The method bases on the linear dependency of the pressure between nozzles connected in series on the ratio of their flow rate. Two reference nozzles and the one under test are connected in turn at the upstream of another arbitrary critical nozzle to compare the pressure between the nozzles. The flow rate can be calculated from a linear interpolation between the two reference flow rates by using the difference of the pressure between the nozzles. No instruments other than a pressure gauge, which must be linear in a narrow pressure range, are required, that is, the system need few procedure to keep its accuracy for a long period. An analysis showed that the uncertainty of the method was almost the same as that of the reference nozzle. This was demonstrated by a realized system by calibrating the nozzles which have been already calibrated by a constant volume tank system. The system is fully automated except for installing the nozzle under test and so efficient that one calibration takes only about 10 minutes.

収録刊行物

  • 計測自動制御学会論文集  

    計測自動制御学会論文集 34(7), 707-713, 1998-07-31 

    The Society of Instrument and Control Engineers

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各種コード

  • NII論文ID(NAID)
    10002478558
  • NII書誌ID(NCID)
    AN00072392
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04534654
  • NDL 記事登録ID
    4528475
  • NDL 雑誌分類
    ZM11(科学技術--科学技術一般--制御工学)
  • NDL 請求記号
    Z14-482
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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