基于宽度学习系统的可见光室内位置感知方法

Visible light indoor position perception method based on broad learning system

  • 摘要: 针对深度学习在可见光室内位置感知中进行训练与位置预测时网络结构复杂、涉及大量超参数且易产生梯度爆炸,从而导致定位时效性较差和精度不稳定的问题,提出一种基于宽度学习的可见光室内位置感知方法。首先将室内可见光环境采集到的光辐射信息作为网络的特征节点,构建基于宽度学习系统的可见光室内位置感知预测模型,然后对网络特征节点进行宽度扩展,最后求解伪逆矩阵,对网络模型进行训练与测试。在4 m×4 m×3 m的室内实验场景下,本文算法平均定位误差为11.63 cm,预测误差小于10 cm,其累积概率为52%,预测误差小于20 cm,其累积概率为97%,宽度学习网络定位速度相比于BP(back propagation)神经网络与RBF(radial basis function)神经网络分别提高了55.1%和39.9%。本文方法提高了可见光室内位置感知的精度与速度,为室内位置感知提供了一种稳定可靠的方法。

     

    Abstract: To address the challenges of complex network architectures, a large number of hyperparameters, and gradient explosion encountered during deep learning training and position prediction in visible light indoor positioning,which can cause the problem of poor positioning timeliness and unstable accuracy ,this paper introduces a broad-learning approach for visible light indoor position perception. First, the light radiation data acquired from the indoor visible light environment was utilized as the feature node for the network. Subsequently, a prediction model for visible light indoor positioning based on the broad learning system was established. Next, the dimensionality of the network feature nodes was expanded. Finally, the pseudo-inverse matrix was computed to train and evaluate the network model. In the laboratory experiment conducted in a 4 m×4 m×3 m environment, the proposed algorithm demonstrated an average positioning error of 11.63 cm. The cumulative probability of prediction errors less than 10 cm was 52%, and that for errors less than 20 cm was 97%. Compared to BP(back propagation) and RBF(radial basis function) neural networks, the width learning network exhibited a 55.1% and 39.9% increase in positioning speed, respectively. The method in this paper improves the accuracy and speed of visible light indoor position perception, and provides a stable and reliable method for indoor position perception.

     

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