【摘要】：為了突破以往鉆孔成像技術(shù)的基本假設(shè)(鉆孔孔壁是圓柱面)和平面成像問題,從而實現(xiàn)鉆孔內(nèi)巖體結(jié)構(gòu)的真三維成像,自主研發(fā)了一套基于雙錐面鏡成像的鉆孔攝像系統(tǒng)。該系統(tǒng)主要由組合式雙錐面鏡、羅盤、光源、遮光罩、攝像裝置和透明玻璃等部件組成,并給出了孔內(nèi)雙錐面鏡立體像對成像的方法和全景像對圖像的解算公式。通過系統(tǒng)測試與結(jié)果分析可知,該系統(tǒng)可以從2個不同角度對同一孔壁結(jié)構(gòu)特性進(jìn)行像對成像,并得到鉆孔孔徑的形態(tài)變化特征和孔壁細(xì)節(jié)的差異特征,實現(xiàn)了孔內(nèi)360°巖體結(jié)構(gòu)的全景立體像對成像和精細(xì)化探測。該系統(tǒng)設(shè)計巧妙、結(jié)構(gòu)簡單、易于實施,提高了對孔壁巖體細(xì)微結(jié)構(gòu)的識別能力和探測的精度,有效推動了鉆孔攝像技術(shù)的發(fā)展。
[Abstract]:In order to break through the basic assumptions of borehole imaging (the borehole wall is a cylindrical surface) and plane imaging, and realize the true three-dimensional imaging of rock mass structure in borehole, a borehole imaging system based on double-cone mirror imaging is developed. The system is mainly composed of combined double conical mirror, compass, light source, shade, camera device and transparent glass. The imaging method of the stereo image pair of the double conical mirror in the hole and the calculating formula of the panoramic image pair are given. Through the system test and the analysis of the results, it can be seen that the system can image the structure characteristics of the same hole from two different angles, and obtain the morphological variation characteristics of the borehole aperture and the different characteristics of the hole wall details. The panoramic stereo imaging and fine detection of 360 擄rock mass structure in the hole are realized. The system is skillful in design, simple in structure and easy to implement. It improves the recognition ability and detection precision of the fine structure of the borehole rock mass, and effectively promotes the development of the borehole camera technology.
【作者單位】： 中國科學(xué)院武漢巖土力學(xué)研究所巖土力學(xué)與工程國家重點實驗室;
【基金】：國家自然科學(xué)基金資助項目(41402278,41372317)~~
【分類號】：TU45
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本文編號：2280825