Compact, Low Power Wireless Sensor Network System for Line Crossing Recognition

Abstract

Abstract-Many application-specific wireless sensor network (WSN) systems require small size and low power features due to their limited resources, and their use in distributed, wireless environments. In this paper, we present a light-weight distributed algorithm for line-crossing recognition, together with its analysis, implementation, and experimental evaluation within a prototype wireless sensor network platform. The algorithm is developed in conjunction with a TDMA-based communication protocol such that the proposed system provides for low duty cycle and energy efficient operation. An accurate lifetime model is proposed with consideration of detailed energy usage to analyze and estimate the system lifetime. Our experimental results demonstrate the accuracy of this lifetime model, and its utility in optimizing network implementation. The design and experimental evaluation of our prototype network demonstrates the compactness and functionality of the proposed distributed WSN system for line-crossing recognition.

Sensor Support Systems for Asymmetric Threat Countermeasures

“…In phase 0 of the proposed algorithm (lines [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], the nodes use a counter to decide whether the subject is approaching based on local decisions of nodes that sense the subject. In its turn, each node receives from its previous neighbor (i.e., the node with ID receives from node , which is its "left" neighbor in the circular, virtual linkage of nodes based on their identifiers).…”

“…Demonstration of the discussed sensor support system for line-crossing recognition is presented in [12]. Here, a highly customized printed circuit board (PCB) is designed to support individual sensor nodes.…”

“…References [8], [12], and [13] are preliminary summaries of the communication protocol, energy modeling, and preamplifier design aspects of this work, respectively. This paper presents these works in more depth by analyzing system-level energy consumption and improvement, and also presents the integration of these works into a complete, operational line crossing recognition system, which forms the main contribution of this paper.…”

A low profile 916 MHz F-inverted compact antenna (FICA) for wireless sensor networks

“…Chip antennas and planar inverted F antennas (PIFAs) already appeared on the market due to their low profile, small size, and effective integration with transceiver chips on circuit boards [1]- [3]. However, these antennas perform well only if a ground plane of proper size is provided.…”

“…At 900 MHz, this length is 83 mm. Although it is acceptable for cell phone technology application, this size is impractical in low power wireless sensor networks (WSN), where the maximum size of the communication node is limited to 1cm to 3cm [3]. This is especially true for low frequency (433 MHz) applications, where the wave length (λ≈70 cm) is large.…”