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Sensors 2018, 18(2), 608; https://doi.org/10.3390/s18020608

Defect-Repairable Latent Feature Extraction of Driving Behavior via a Deep Sparse Autoencoder

1
The Graduate School of Information Science and Engineering, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
2
Research Fellow (DC) with the Japan Society for the Promotion of Science, Tokyo 102-0083, Japan
3
The College of Information Science and Engineering, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
4
The Corporate R&D Div.1, Sensing System R&D Dept., DENSO CORPORATION, Aichi 448-8661, Japan
5
The DENSO International America, Inc., San Jose, CA 95110, USA
*
Author to whom correspondence should be addressed.
Received: 15 January 2018 / Revised: 9 February 2018 / Accepted: 9 February 2018 / Published: 16 February 2018
(This article belongs to the Section Intelligent Sensors)
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Abstract

Data representing driving behavior, as measured by various sensors installed in a vehicle, are collected as multi-dimensional sensor time-series data. These data often include redundant information, e.g., both the speed of wheels and the engine speed represent the velocity of the vehicle. Redundant information can be expected to complicate the data analysis, e.g., more factors need to be analyzed; even varying the levels of redundancy can influence the results of the analysis. We assume that the measured multi-dimensional sensor time-series data of driving behavior are generated from low-dimensional data shared by the many types of one-dimensional data of which multi-dimensional time-series data are composed. Meanwhile, sensor time-series data may be defective because of sensor failure. Therefore, another important function is to reduce the negative effect of defective data when extracting low-dimensional time-series data. This study proposes a defect-repairable feature extraction method based on a deep sparse autoencoder (DSAE) to extract low-dimensional time-series data. In the experiments, we show that DSAE provides high-performance latent feature extraction for driving behavior, even for defective sensor time-series data. In addition, we show that the negative effect of defects on the driving behavior segmentation task could be reduced using the latent features extracted by DSAE. View Full-Text
Keywords: feature extraction; defects repairing; deep learning; driving behavior analysis feature extraction; defects repairing; deep learning; driving behavior analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Liu, H.; Taniguchi, T.; Takenaka, K.; Bando, T. Defect-Repairable Latent Feature Extraction of Driving Behavior via a Deep Sparse Autoencoder. Sensors 2018, 18, 608.

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