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Car Crash: Sensing, Monitoring and Detection

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 8097

Special Issue Editors


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Guest Editor
Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, 00185 Roma RM, Italy
Interests: dynamics; vibrations; damping; fluid-structure & electro; mechanic interaction; vehicle dynamics

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Guest Editor
Department of Mechanical and Aerospace Engineering, Sapienza University of Rome, 00185 Roma RM, Italy
Interests: SHM; EMD; HHT; FBG; irreversible phenomena

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Guest Editor
Department of Computer, Automatic and Management Engineering, Sapienza University of Rome, 00185 Roma RM, Italy
Interests: mechanical engineering

Special Issue Information

Dear Colleagues,

Sensors (ISSN 1424-8220; CODEN: SENSC9) is the leading international, peer-reviewed, open access journal on the science and technology of sensors. Sensors is published semimonthly online by MDPI. The Polish Society of Applied Electromagnetics (PTZE) and Japan Society of Photogrammetry and Remote Sensing (JSPRS) are affiliated with Sensors, and their members receive a discount on the article processing charges.https://www.mdpi.com/journal/sensors

Car motion monitoring by special sensors is a technology attracting a large number of researchers and companies all over the world. Many strategies of sensing are under investigation, ranging from accelerometer sensors to image processing and acoustic emission in the case of crashes, involving data fusion processes. Sensors, sampling circuits and digital techniques for data reduction and algorithms for signal analysis and data processing are challenging, especially for good classification performance and acceptable computational costs. Many uses of the information captured by the onboard sensors are possible. Safety alerts sent by the car in the case of an accident permits the real-time identification of injured persons and immediate rescue. The chance of making a classification and distinction between real accident events and possible frauds has important implications for insurance companies. Finally, the monitoring of driving behaviour is key for attributing a safety score to personal driving styles and the possible associated insurance costs.

The topics for this issue include, but are not limited to, the following:

  • Sensors and techniques for car crash monitoring and driving behaviour;
  • Sensor data fusion and integration;
  • Sensor data reduction through digital signal processing techniques and adaptive firmware;
  • The integration of sensor data by modelling and simulation;
  • Classification techniques for car crashes, by signal analysis, machine learning and AI tools;
  • Experimental campaigns for crash data acquisition.

Prof. Dr. Antonio Carcatera
Dr. Nicola Roveri
Dr. Gianluca Pepe
Guest Editors

Manuscript Submission Information

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Published Papers (1 paper)

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Research

25 pages, 7724 KiB  
Article
YOLOv5-AC: Attention Mechanism-Based Lightweight YOLOv5 for Track Pedestrian Detection
by Haohui Lv, Hanbing Yan, Keyang Liu, Zhenwu Zhou and Junjie Jing
Sensors 2022, 22(15), 5903; https://doi.org/10.3390/s22155903 - 7 Aug 2022
Cited by 38 | Viewed by 6109
Abstract
In response to the dangerous behavior of pedestrians roaming freely on unsupervised train tracks, the real-time detection of pedestrians is urgently required to ensure the safety of trains and people. Aiming to improve the low accuracy of railway pedestrian detection, the high missed-detection [...] Read more.
In response to the dangerous behavior of pedestrians roaming freely on unsupervised train tracks, the real-time detection of pedestrians is urgently required to ensure the safety of trains and people. Aiming to improve the low accuracy of railway pedestrian detection, the high missed-detection rate of target pedestrians, and the poor retention of non-redundant boxes, YOLOv5 is adopted as the baseline to improve the effectiveness of pedestrian detection. First of all, L1 regularization is deployed before the BN layer, and the layers with smaller influence factors are removed through sparse training to achieve the effect of model pruning. In the next moment, the context extraction module is applied to the feature extraction network, and the input features are fully extracted using receptive fields of different sizes. In addition, both the context attention module CxAM and the content attention module CnAM are added to the FPN part to correct the target position deviation in the process of feature extraction so that the accuracy of detection can be improved. What is more, DIoU_NMS is employed to replace NMS as the prediction frame screening algorithm to improve the problem of detection target loss in the case of high target coincidence. Experimental results show that compared with YOLOv5, the AP of our YOLOv5-AC model for pedestrians is 95.14%, the recall is 94.22%, and the counting frame rate is 63.1 FPS. Among them, AP and recall increased by 3.78% and 3.92%, respectively, while the detection speed increased by 57.8%. The experimental results verify that our YOLOv5-AC is an effective and accurate method for pedestrian detection in railways. Full article
(This article belongs to the Special Issue Car Crash: Sensing, Monitoring and Detection)
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