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首页> 外文期刊>Mathematical Problems in Engineering: Theory, Methods and Applications >Research on Wavelet Threshold Denoising Method for UWB Tunnel Personnel Motion Location
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Research on Wavelet Threshold Denoising Method for UWB Tunnel Personnel Motion Location

机译：Research on Wavelet Threshold Denoising Method for UWB Tunnel Personnel Motion Location

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摘要

In the process of tunnel construction, the problems of strong sealing, inconvenient communication, and harsh environment pose a serious threat to the personal safety of construction workers. Therefore, personnel positioning technology has important application value in tunnel safety construction. A special environment for tunnel personnel positioning and the ultrawideband (UWB) positioning system are affected by personnel movement, which leads to the problem of lowering positioning accuracy. A wavelet threshold denoising method for motion positioning of people in tunnels is proposed. The positioning algorithm of the method adopts a three-sided positioning algorithm based on symmetric double-sided two-way ranging. The wavelet analysis is used to decompose the motion signal of the personnel in the tunnel, and the low frequency coefficient and high frequency coefficient of the signal are decomposed to determine the influence of the motion noise of the personnel on the UWB positioning. The soft threshold function and the hard threshold function are, respectively, selected to perform wavelet threshold denoising on the motion positioning result in the tunnel. According to the denoising effect, the db5 wavelet 5-layer decomposition, under the heuristic threshold estimation criterion, the soft threshold function denoising is the best denoising method. The verification by the positioning experiment shows that the method is suitable for tunnel personnel positioning. The wavelet threshold denoising method can weaken the influence of outliers in the motion positioning of UWB personnel and improve the positioning accuracy.

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    Liu Ning; Zhang Ranqiao; Su ZhongFu GuodongHe Jingang;

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    Beijing Informat Sci & Technol Univ, Beijing Key Lab High Dynam Nav Technol, Beijing 100101, Peoples R China;

    Beijing Informat Sci & Technol Univ, Beijing Key Lab High Dynam Nav Technol, Beijing 100101, Peoples R China|Beijing Inst Technol, Sch Automat, Beijing 100081, Peoples R China;

    Beijing Informat Sci & Technol Univ, Beijing Key Lab High Dynam Nav Technol, Beijing 100101, Peoples R China|Beijing Dewei Chuang Ying Technol Co Ltd, Beijing 100081, Peoples R ChinaChina Commun Informat Ctr Co Ltd, Beijing 100085, Peoples R China;

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