隧道环境下毫米波雷达多机联合毫米级定位方法
P258; 随着安全监测智能化时代的到来,隧道环境下监测点定位测量相关研究逐渐向全天候和全天时等方向发展.针对隧道监测点定位时存在实时性较差且测量周期长等问题,同时易受灰尘和照明等因素影响,本文引入具有较高距离与速度分辨率的毫米波雷达开展隧道监测点高精度定位研究,提出一种基于多台毫米波雷达联合测距的定位方法.首先,在快速傅里叶变换提取测距信息的基础上,提出采用线性调频Z变换细化频谱并结合相位差对测距值进行精化,保障测距精度稳定在毫米级;然后,针对传统测距雷达仅能获取一维径向形变的弊端,采用多台毫米波雷达同步观测,建立多机联合定位函数模型,构建了 一种顾及单次观测雷达脉冲测量精度差异和先验距离的...
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| Published in | 测绘学报 Vol. 53; no. 9; pp. 1679 - 1693 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
武汉大学测绘学院智能监测研究中心,湖北武汉 430079%中铁第四勘察设计院集团有限公司,湖北武汉 430063%武汉大学测绘学院,湖北武汉 430079
16.10.2024
武汉大学测绘学院,湖北武汉 430079 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 |
| DOI | 10.11947/j.AGCS.2024.20230352 |
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| Abstract | P258; 随着安全监测智能化时代的到来,隧道环境下监测点定位测量相关研究逐渐向全天候和全天时等方向发展.针对隧道监测点定位时存在实时性较差且测量周期长等问题,同时易受灰尘和照明等因素影响,本文引入具有较高距离与速度分辨率的毫米波雷达开展隧道监测点高精度定位研究,提出一种基于多台毫米波雷达联合测距的定位方法.首先,在快速傅里叶变换提取测距信息的基础上,提出采用线性调频Z变换细化频谱并结合相位差对测距值进行精化,保障测距精度稳定在毫米级;然后,针对传统测距雷达仅能获取一维径向形变的弊端,采用多台毫米波雷达同步观测,建立多机联合定位函数模型,构建了 一种顾及单次观测雷达脉冲测量精度差异和先验距离的随机模型;最后,通过隧道试验验证了测距与定位算法精度.结果表明,在无其他干扰的情况下,本文提出的基于线性调频Z变换的相位差法测距精度能达到0.3 mm,算法计算效率较已有方法提高50倍.待测目标稳定的情况下,本文多机联合定位方法X方向精度为2.7 mm,Y方向为0.6 mm,受隧道高度的影响,Z方向精度略低,为6.6 mm.待测目标微动的情况下,该方法能准确探测微小形变,满足监测点全天候、全天时、高精度的实时定位测量需求,并有望在工业结构变形监测中得到应用. |
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| AbstractList | P258; 随着安全监测智能化时代的到来,隧道环境下监测点定位测量相关研究逐渐向全天候和全天时等方向发展.针对隧道监测点定位时存在实时性较差且测量周期长等问题,同时易受灰尘和照明等因素影响,本文引入具有较高距离与速度分辨率的毫米波雷达开展隧道监测点高精度定位研究,提出一种基于多台毫米波雷达联合测距的定位方法.首先,在快速傅里叶变换提取测距信息的基础上,提出采用线性调频Z变换细化频谱并结合相位差对测距值进行精化,保障测距精度稳定在毫米级;然后,针对传统测距雷达仅能获取一维径向形变的弊端,采用多台毫米波雷达同步观测,建立多机联合定位函数模型,构建了 一种顾及单次观测雷达脉冲测量精度差异和先验距离的随机模型;最后,通过隧道试验验证了测距与定位算法精度.结果表明,在无其他干扰的情况下,本文提出的基于线性调频Z变换的相位差法测距精度能达到0.3 mm,算法计算效率较已有方法提高50倍.待测目标稳定的情况下,本文多机联合定位方法X方向精度为2.7 mm,Y方向为0.6 mm,受隧道高度的影响,Z方向精度略低,为6.6 mm.待测目标微动的情况下,该方法能准确探测微小形变,满足监测点全天候、全天时、高精度的实时定位测量需求,并有望在工业结构变形监测中得到应用. |
| Abstract_FL | With the arrival of the intelligent safety monitoring era,research on monitoring point positioning measurement in tunnels and mines is gradually developing towards all-time and all-weather aspects.In response to the problems of poor real-time performance and long measurement period in tunnel monitoring point positioning,as well as susceptibility to factors such as dust and lighting,this paper introduces millimeter wave radar with high distance and speed resolution to conduct high-preci-sion positioning research for tunnel monitoring points.An innovative millimeter-level positioning method for tunnel environ-ment based on multiple millimeter wave radars network is proposed.Firstly,based on the traditional fast Fourier transform to extract ranging information,a method is proposed to refine the frequency spectrum using chirp-Z transform.This method can optimize the ranging observations and ensure ranging accuracy at the millimeter level.Secondly,due to the drawback that tra-ditional ranging radars can only obtain one-dimensional radial deformation,multiple millimeter radars network method is intro-duced.Further,a functional model for multi machine network positioning is established.In addition,a random model is pro-posed that takes into account the difference of each millimeter wave radar in radar pulse observation accuracy of each epoch and prior distance.Finally,the precision of ranging and positioning is verified through tunnel tests.The results show that,the phase difference method based on chirp-Z transform proposed in this manuscript can achieve ranging precision within 0.3 mm,and the computational efficiency of the algorithm is improved by 50 times compared to the existing method.When the target to be monitored is stable,the precision of X,Y and Z directions is 2.7 mm,0.6 mm and 6.6 mm.However,the elevation direc-tion precision is slightly lower due to the influence of tunnel height.In the case of micro movement of the target to be tested,this proposed method can detect small deformations.The method proposed in this manuscript meets the requirements of moni-toring point real-time positioning in tunnel environment for all time,high accuracy,and long periods.Furthermore,it is ex-pected to be applied in industrial structure deformation monitoring. |
| Author | 邹进贵 张小溪 王泽 赵胤植 王鑫哲 |
| AuthorAffiliation | 武汉大学测绘学院,湖北武汉 430079;武汉大学测绘学院智能监测研究中心,湖北武汉 430079%中铁第四勘察设计院集团有限公司,湖北武汉 430063%武汉大学测绘学院,湖北武汉 430079 |
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| Author_FL | ZOU Jingui ZHANG Xiaoxi ZHAO Yinzhi WANG Ze WANG Xinzhe |
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| Keywords | 毫米波雷达 结构变形监测 tunnel environment 隧道环境 millimeter-wave radar 毫米级定位 millimeter-level positioning 线性调频Z变换 structure deformation monitoring chirp-Z transform |
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| Title | 隧道环境下毫米波雷达多机联合毫米级定位方法 |
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