本文選題：限界檢測 + CMOS相機(jī)　； 參考：《鐵道科學(xué)與工程學(xué)報》2017年03期

【摘要】：針對目前鐵路限界檢測存在的效率低和精度低等問題,提出采用多個CMOS相機(jī)結(jié)合可控頻閃光源測距的限界檢測方法。將測距系統(tǒng)安裝在列車端部,動態(tài)偏移量系統(tǒng)與測速系統(tǒng)安裝在列車底部,三者之間同步控制。根據(jù)攝像機(jī)成像原理,定義合理坐標(biāo)系,建立單相機(jī)限界檢測數(shù)學(xué)模型,并根據(jù)參數(shù)的特殊性簡化模型。列車運(yùn)行過程中,調(diào)節(jié)光源的頻閃頻率與相機(jī)的曝光時間,同一物體可以在一幀圖像中周期成像,通過圖像處理,得出周期成像的平均距離,不同距離的物體成像的平均距離不同,結(jié)合列車頻閃周期內(nèi)運(yùn)行距離以及相機(jī)焦距可以計算限界距離。在此基礎(chǔ)上,設(shè)計出一套測距設(shè)備,并在試驗臺上進(jìn)行實驗驗證。研究結(jié)果表明,提高光源的閃光頻率,測試誤差隨之減小,為限界檢測的在線實驗提供了依據(jù)。
[Abstract]:Aiming at the problems of low efficiency and low precision in railway boundary detection at present, a method of limit detection based on multiple CMOS cameras combined with controllable stroboscopic light source is proposed. The ranging system is installed at the end of the train, the dynamic offset system and the velocity measuring system are installed at the bottom of the train, and the three systems are controlled synchronously. According to the principle of camera imaging, the reasonable coordinate system is defined, and the mathematical model of limit detection of single camera is established, and the model is simplified according to the particularity of parameters. In the course of train operation, by adjusting the stroboscopic frequency of the light source and the exposure time of the camera, the same object can be periodically imaged in a frame of image. Through image processing, the average distance of the periodic imaging can be obtained. The average imaging distance of objects with different distances is different, and the limit distance can be calculated by combining the running distance of train stroboscopic cycle and the camera focal length. On this basis, a ranging equipment is designed and tested on the test bench. The results show that the measurement error decreases when the flash frequency of the light source is increased, which provides the basis for the on-line experiment of the limit detection.
【作者單位】： 中南大學(xué)交通運(yùn)輸工程學(xué)院軌道交通安全教育部重點(diǎn)實驗室;
【基金】：高速鐵路基礎(chǔ)研究聯(lián)合基金重點(diǎn)資助項目(U1134205) 中南大學(xué)教師研究基金資助項目(2013JSJJ013)
【分類號】：U298

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 于革;賈利民;秦勇;楊艷芳;;視頻監(jiān)控鐵路限界內(nèi)逗留物體的檢測方法[J];中國鐵道科學(xué);2013年04期

相關(guān)會議論文 前1條

1 甄勇;呂清華;;信息技術(shù)在鐵路限界管理中的應(yīng)用[A];廣西計算機(jī)學(xué)會2008年年會論文集[C];2008年

相關(guān)重要報紙文章 前1條

1 記者 鄭曉青;鐵道部：“火車撞了白撞”說法不準(zhǔn)確[N];商務(wù)時報;2007年

，

本文編號：1891783