Performance Evaluation of Magnetic Wireless Sensor Networks Algorithm for Traffic Flow Monitoring in Chaotic Cities

Abstract

Traffic flow monitoring involves the capturing and dissemination of real-time traffic flow information for a road network. When a vehicle, a ferromagnetic object, travels along a road, it disturbs the ambient Earth’s magnetic field, causing its distortion. The resulting distortion carries vehicle signature containing traffic flow related information such as speed, count, direction, and classification. To extract such information in chaotic cities, a novel algorithm based on the resulting magnetic field distortion was developed using nonintrusive sensor localization. The algorithm extracts traffic flow information from resulting magnetic field distortions sensed by magnetic wireless sensor nodes located on the sides of the road. The model magnetic wireless sensor networks algorithm for local Earth’s magnetic field performance was evaluated through simulation using Dar es Salaam City traffic flow conditions. Simulation results for vehicular detection and count showed 93% and 87% success rates during normal and congested traffic states, respectively. Travel Time Index (TTI) was used as a congestion indicator, where different levels of congestion were evaluated depending on the traffic state with a performance of 87% and 88% success rates during normal and congested traffic flow, respectively.

Enhanced Magnetic Wireless Sensor Network Algorithm for Traffic Flow Monitoring in Low-Speed Congested Traffic

“…Magnet WSNs for traffic flow monitoring utilize magnetic sensors that capture the ambient Earth's magnetic fields distorted by the passing vehicles [4,5]. e programmed signal-processing algorithm processes the distorted signal to obtain the desired data.…”

“…Scanning and Decision Algorithm II (SDA-II) is a signalprocessing algorithm improvement of the SDA algorithm [4]. e new algorithm is based on a moving-average model operating in the time domain.…”

High Sensitivity Non-split Drain MAGFET for Wireless Sensor Networks

“…Future trends of increasing the efficiency of magnetic field detectors will focus on continuously improving to a smaller size, low power consumption, and high sensitivity, suitable for application in various environments [1]. Nowadays, there is a proposal to apply magnetic sensors to check the position of the vehicle, including, developing algorithms as wireless magnetic sensor networks for real-time traffic flow monitoring and data processing for a road network [2][3][4]. For smart systems, the sensor can be integrated within the processor chip which as all of them are work efficiently even in low voltage and low power operation.…”