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基于LabVIEW的電渦流檢測二維連續同步掃查系統設計
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南京師范大學(xué)

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國家自然科學(xué)基金(51605229);國家重點(diǎn)實(shí)驗室開(kāi)放課題(MCMS-E-0519G03);江蘇省重點(diǎn)研發(fā)計劃項目(BE2018010)


A two-dimensional continuous synchronous scanning system for eddy current detection based on LabVIEW
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    摘要:

    基于渦流法利用電機驅動(dòng)的位移臺或掃查架對大尺寸構件進(jìn)行平面掃查時(shí),由于電機連續運行有加速勻速減速三個(gè)階段,電機運行和數據采集時(shí)鐘不一致,造成采樣點(diǎn)與空間實(shí)際位置不匹配,因此本文提出一種基于LabVIEW的渦流檢測二維連續同步掃查系統,提高系統檢測效率以及準確性。通過(guò)對電機加速運動(dòng)和減速運動(dòng)編碼器脈沖與采集卡晶振時(shí)鐘脈沖進(jìn)行對比分析,并分別將編碼器脈沖與晶振時(shí)鐘脈沖作為數據采集卡采集數據的觸發(fā)時(shí)鐘進(jìn)行實(shí)驗驗證。結果表明,采用晶振時(shí)鐘脈沖作為采集數據的觸發(fā)時(shí)鐘時(shí),成像的裂紋位置與實(shí)際裂紋位置有一個(gè)明顯的偏移。采用編碼器脈沖作為采集數據的觸發(fā)時(shí)鐘時(shí),成像的裂紋位置與實(shí)際裂紋位置基本一致,從而驗證了該系統的可靠性以及在工程運用中的可行性。

    Abstract:

    When using a motor-driven displacement stage or scanning frame to perform continuous two-dimensional planar scanning of large components based on the eddy current method, since the motor runs continuously in three stages of acceleration, constant speed and deceleration, the motor operation and data acquisition clock are inconsistent, causing the mismatch of the sampling points to the actual position in space. Therefore, a two-dimensional continuous synchronous scanning system for eddy current detection based on LabVIEW is proposed to improve the detection efficiency and accuracy of the system. By comparing and analyzing the encoder pulses and crystal clock pulses of the acquisition card during acceleration and deceleration of the motor, and using the encoder pulses and crystal clock pulses as trigger clocks for data acquisition by the data acquisition card. The experimental verification shows that when using the crystal clock pulse as the trigger clock for data acquisition, there is an obvious deviation between the image crack location and the actual crack location. When the encoder pulse is used as the trigger clock for data acquisition, the crack location of imaging is basically consistent with the actual crack location, which verifies the reliability of the system and the feasibility in engineering application.

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程軍,李晴,游勇,徐帥,曹?chē)A,楊繼全.基于LabVIEW的電渦流檢測二維連續同步掃查系統設計計算機測量與控制[J].,2020,28(9):42-45.

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  • 收稿日期:2020-01-02
  • 最后修改日期:2020-02-20
  • 錄用日期:2020-02-20
  • 在線(xiàn)發(fā)布日期: 2020-09-16
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