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  • 一種基于33250A型信號源的數字超聲探傷儀水平線性誤差
    中國測試陳沈理, 何卓斌, 楊德俊
    一種基于33250A型信號源的數字超聲探傷儀水平線性誤差測試方法
    摘  要:針對數字式超聲探傷儀水平線性誤差的準確測試,提出一種方法,即基于33250A型函數信號發生器,利用其函數信號發生器外部觸發延時輸出的功能模擬超聲探傷儀水平線性的距離,可以準確地測試數字式超聲探傷儀的水平線性誤差。通過實驗設計和實驗數據驗證,結果表明:該方法有效可行,可為超聲探傷儀的水平線性誤差測試提供參考。
    關鍵詞:超聲探傷儀;掃描范圍;水平線性誤差;電信號
    文獻標志碼:A       文章編號:1674-5124(2016)01-0038-03
    Horizontal linear error test method for digital ultrasonic flaw detector based on
    33250A signal generator
    CHEN Shenli, HE Zhuobin, YANG Dejun
    (Guangdong Institute of Metrology,Guangzhou 510405,China)
    Abstract: A 33250A function signal generator is used to test accurate horizontal linear error of digital ultrasonic flaw detectors. First, the delay output triggered by the function signal generator is applied to simulate the horizontal linearity distance of the detector. Then, the horizontal linear error could be accurately tested according to the formula that distance is the product of time and speed. Eventually, this method is proved feasible through experimental design and data.
    Keywords: ultrasonic flaw detector; scanning range; horizontal linear error; electrical signal
     
     
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