本文選題：巷道 + 擴(kuò)頻定位�。� 參考：《煤炭學(xué)報(bào)》2017年05期

【摘要】：擴(kuò)頻測(cè)距是實(shí)現(xiàn)TOA定位的一種重要方式,在礦井環(huán)境下,由于密集多徑的影響,其所測(cè)量數(shù)據(jù)具有非零均值的正向誤差,嚴(yán)重影響目標(biāo)的定位精度。針對(duì)這一問(wèn)題,在研究井下巷道擴(kuò)頻測(cè)距正向偏差產(chǎn)生機(jī)制的基礎(chǔ)上,提出一種測(cè)距平面約束下投影巷道空間的定位方法,以巷道延伸方向?yàn)閤軸,巷道寬方向?yàn)閥軸,建立測(cè)距平面,由于礦井巷道是狹長(zhǎng)鏈狀的,可以忽略定位目標(biāo)在巷道內(nèi)橫截面上的信息,只關(guān)心定位目標(biāo)在巷道內(nèi)x方向上的位置信息,因此方法采用向x方向投影實(shí)現(xiàn)移動(dòng)目標(biāo)的一維定位,并充分利用y方向的冗余信息對(duì)定位目標(biāo)點(diǎn)在測(cè)距平面上加以約束以使得x方向的估計(jì)值向真實(shí)值趨近,同時(shí)測(cè)距偏移誤差轉(zhuǎn)移到定位目標(biāo)點(diǎn)的y方向,顯著優(yōu)化了x方向的定位精度。試驗(yàn)結(jié)果表明,該方法能夠統(tǒng)一NLOS與LOS定位場(chǎng)景,不但在巷道方向上可獲得零均值誤差的定位估計(jì)值,而且能有效抑制測(cè)距系統(tǒng)的隨機(jī)誤差。
[Abstract]:Spread spectrum ranging is an important way to realize TOA location. In the mine environment, because of the influence of dense multipath, the measured data have the positive error of non-zero mean value, which seriously affects the positioning accuracy of the target. In order to solve this problem, on the basis of studying the mechanism of generating forward deviation of spread spectrum ranging in underground roadway, a method of locating the space of projection roadway under the constraint of ranging plane is proposed. The extended direction of roadway is x axis, and the wide direction of roadway is y axis. Because the mine laneway is narrow and long chain, it can ignore the information of the location target on the cross section of the tunnel, and only care about the location information of the location target in the x direction of the roadway. In this method, one dimensional location of moving target is realized by projection to x direction, and the redundant information in y direction is fully used to constrain the location point on the ranging plane to make the estimated value of x direction approach to the true value. At the same time, the ranging offset error is transferred to the y direction of the target point, and the location accuracy of the x direction is significantly optimized. The experimental results show that this method can unify the NLOS and LOS location scenes, not only can obtain the location estimation of zero mean error in the roadway direction, but also can effectively suppress the random error of the ranging system.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)機(jī)電與信息工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)資助項(xiàng)目(51134024) 國(guó)家重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2016YFC0801800)
【分類號(hào)】：TD76;TN914.42
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本文編號(hào)：1800813