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無(wú)砟軌道扣件快速匹配定位方法研究
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上海工程技術(shù)大學(xué)—城市軌道交通學(xué)院,,,

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國家自然科學(xué)基金項目(51478258)、上海市科委重點(diǎn)支撐項目(No. 18030501300


The Fast Matching and Localization Method for Ballastless Track Fastener
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    摘要:

    針對現有扣件定位方法速度慢、定位不準確的問(wèn)題,結合無(wú)砟軌道的特點(diǎn),提出一種無(wú)砟軌道扣件快速匹配定位算法。該算法針對傳統匹配算法運算量大、匹配結果不準確的缺點(diǎn),采用梯度法求取扣件圖像的方向場(chǎng),并根據鋼軌區域方向場(chǎng)的各向一致性,鎖定扣件感興趣區域,實(shí)現圖像裁剪,減少模板搜索空間;模板匹配則通過(guò)計算模板和圖像方向場(chǎng)對應點(diǎn)之間的絕對值距離實(shí)現扣件匹配定位,并利用方向場(chǎng)采樣、基于統計方法確定搜索起點(diǎn)位置、隨機抽樣一致性等方法提高匹配速度和精度。實(shí)驗結果表明,該算法匹配速度快、魯棒性強,能夠滿(mǎn)足扣件檢測識別中對扣件匹配的實(shí)時(shí)性和準確性的要求,與傳統的模板匹配定位方法相比,速度提高了30%左右,且對于不同光線(xiàn)條件下的匹配成功率均大于95%。

    Abstract:

    Since the existing location algorithm of faster is slow and the result is inaccurate, combining with the characteristics of Ballastless Track Fastener, this paper proposed a fast matching and localization method for ballastless track fastener. In view of the problem of traditional fastener matching method, which is complex and inaccurate, the gradient directional field was used. Moreover, according to the consistency of consistency, the target area of faster can be locked, which may reduce the space of search by cropping the image. Template matching calculate the absolute distance of corresponding points in the directional field between the template and the image, which combining the directional field sampling, the starting point of search based on statistical method, and the method of adjusting the position and attitude parameters by the least square method to improve the matching speed and accuracy of results. The results of experiment show that the method greatly improves matching speed and has the characteristics of robustness, which can meet the demands of real-time and accuracy of matching and localization for ballastless track fastener. Compared with the traditional template matching method, the percent of speed improvements using this way is 30% and the percent of matching success under different lighting conditions is greater than 95%.

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李倩,陳興杰,彭樂(lè )樂(lè ),安小雪.無(wú)砟軌道扣件快速匹配定位方法研究計算機測量與控制[J].,2019,27(1):267-270.

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歷史
  • 收稿日期:2018-06-27
  • 最后修改日期:2018-07-17
  • 錄用日期:2018-07-18
  • 在線(xiàn)發(fā)布日期: 2019-01-25
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