一種基于33250A型信號(hào)源的數(shù)字超聲探傷儀水平線性誤差測(cè)試方法
摘  要：針對(duì)數(shù)字式超聲探傷儀水平線性誤差的準(zhǔn)確測(cè)試，提出一種方法，即基于33250A型函數(shù)信號(hào)發(fā)生器，利用其函數(shù)信號(hào)發(fā)生器外部觸發(fā)延時(shí)輸出的功能模擬超聲探傷儀水平線性的距離，可以準(zhǔn)確地測(cè)試數(shù)字式超聲探傷儀的水平線性誤差。通過(guò)實(shí)驗(yàn)設(shè)計(jì)和實(shí)驗(yàn)數(shù)據(jù)驗(yàn)證，結(jié)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(cè)試提供參考。
關(guān)鍵詞：超聲探傷儀；掃描范圍；水平線性誤差；電信號(hào)
文獻(xiàn)標(biāo)志碼：A       文章編號(hào)：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