Proposed Wireless sensor network in vehicles for road surveillance

摘要

Considering wide application of Ultra wide Band (UWB) Wireless sensor networks (WSN) and the need of safety precautions on road due to heavy traffic this paper presents an algorithm design of a proposed radar surveillance system that can be used in vehicles for road surveillance. The system is an extension of UWB intruder localization system which uses one transmitter and three receivers. The algorithm is designed by creating a hybrid of three widely used WSN algorithms Received Signal Strength Indicator (RSSI), Time of Arrival (ToA) and Angle of Arrival (AoA). RSSI is used for range estimation form receivers while AoA and ToA are used to specify surveillance area for each receiver. Virtual Reference Tags (VRTs) which are previously used in RFID localization systems are also part of our design, to point exact location of intruding vehicle and reduce error. Each VRT has the information of received signal strength and distance from receivers. Also this paper presents a new driver alerting method which is designed on steering wheel of vehicle. This alerting method provides road surveillance information to driver without distracting his attention.