MagTrack

Abstract

Hands on the wheel, eyes on the road" is the central guideline of safe vehicle driving practices. Many advanced driver assistance systems can effectively detect abnormal vehicle motions. However, these systems often leave insufficient time for drivers to respond to complex road situations, especially when the drivers are distracted. To reduce accidents, it is essential to detect whether a driver complies with safe driving guidelines in real time and provide warnings early before any dangerous maneuvers occur. There are vision-based driver distraction monitoring systems which rely on cameras in high-end vehicles, but their performances are heavily constrained by visibility requirements. In this paper, we present MagTrack, a driver monitoring system that is based on tracking magnetic tags worn by the user. With a single smartwatch and two low-cost magnetic accessories: a hand magnetic ring and a head magnetic eyeglasses clip, our system tracks and classifies a driver's bimanual and head movements simultaneously using both analytical and approximation sensing models. Our approach is robust to driver's postures, vehicles, and environmental changes. We demonstrate that a wide range of activities can be detected by our system, including bimanual steering, visual and manual distractions, and lane changes and turns. In extensive road tests with 500+ instances of driving activities and 500+ minutes of road driving with 10 subjects, MagTrack achieves 87% of precision and 90% of recall rate on the detection of unsafe driving activities. CCS CONCEPTS• Human-centered computing → Ubiquitous and mobile computing.

Uncovering User Interactions on Smartphones via Contactless Wireless Charging Side Channels

“…The current prototype also assumes the awareness of the distance and relative angle between the attacking device and the target charger. This limitation might be alleviated if tweaking existing solutions proposed to detect the distance and angle by using magnetometers [68] and additional sensors [30], such as the accelerometer and gyroscope, which have already been integrated into most commodity smartphones. Further investigation is another future work.…”

“…Some channels are studied from a similar perspective in both platforms (e.g., cache side channels in Android [38], [82] and in iOS [22], [28]), while some are from a slightly different perspective. For example, magnetic side channels in iOS have been explored to monitor app activities [45] assuming pre-installed malicious apps and channels in Android are leveraged to finger movement trajectories [30], [41], [60] requiring additional equipment (e.g., stylus). In addition, some side channels have only been studied in Android, such as using channels based on procfs to eavesdrop keystrokes, fingerprint webpages, and hijack UIs [18], [24], [31], [37], [54], [81].…”

Magnetic Micro and Nano Sensors for Continuous Health Monitoring

“…Huang et al suggested monitoring people while they drive a car using a smartwatch that is tracking magnetic tags in the form of a magnetic ring and a magnetic eyeglasses clip for the head [60]. Combining a magnetic ring on the index finger with two triaxial magnetometers in a watch-like system, Friedman et al measured wrist and hand movement [61].…”

Smartwatch-Based Information System as a Compliance Detector in Traffic

“…In this paper, we present Midtrack, a driver monitoring system that is based on tracking magnetic tags worn by the user. With a single smartwatch and two low-cost magnetic accessories [6]. Other studies also mention that the system that uses smart watches is very good at detecting unsafe behaviour of drivers directly [7].…”