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This paper describes communication method for use in a wireless sensor network, which focus on a bidirectional communication with prevention of data loss and minimization of a power consumption of the wireless sensor. The method described was successfully tested and verified on an existing installation of a wireless sensor network. The power consumption is a key parameter for a disposable, battery...
Wireless Sensor Networks (WSNs) have to be autonomous and less dependent to human's intervening. Most of the scenarios need WSNs for continuous monitoring and it has to be for months or years. However, achieving so, has not been trivial since power consumption affects directly WSNs' lifetime. A sensor node's power supply is the most precious part. Therefore, the idea is to reduce the wasted energy...
This paper introduced a wireless power transfer system controlled by a microchip board. Recently, wireless sensor network for structure health monitoring has been developed. However, battery consumption became an important problem, especially in structure health monitoring system, since maintenance costs huge human resources. Therefore, a wireless power transfer system is developed to supply sensor...
Established a wireless sensor networks and a concrete plan is brought forward based On ZigBee technology. Corrected the time of network by Time Protocol. The hardware and software of the system is designed. Finally, the application effects of the system are analyzed and compared. The System realized the goals such as low cost, low consumption, high stability, high flexibility and expansibility. The...
Power consumption is one of the most important problems for wireless sensor networks because of the battery limitation in each sensor. This paper presents an ant colony optimization- (ACO-) based routing algorithm to reduce power consumption. First, a grade table is built and referred to generate several possible routing paths. Then, the ACO explores these paths to reduce the power consumption of...
Based on a wireless sensor network with fixed network structure applied to grain storage monitoring system, the thesis designs an effective awakening strategy in the case of the non-synchronous network nodes. It enhances one-time-wake-up-rate of nodes with low power consumption, which overcomes the disadvantage of the universal awakening strategy. Experiment results show that one-time-wake-up-rate...
Technology advantages of wireless sensor networks have shown great deal of promises in various biomedical applications. In this paper we introduced a specially-designed body sensor networks (BSN) development platform for on-body physiological measurements and body-proximal wireless data communications. The BSN platform we have developed insofar include BSN node boards, a photoplethysmograph sensor...
To prevent water leak from causing damage, the use of centralized alarming system consisting of several water leak detectors can be placed in targeted areas. However, the installation costs for these types of alarming systems are high, especially in already finished buildings since they require a lot of wiring for handling of the alarming system. To solve this problem water leak detectors that use...
A sensor network has greater potential for performance improvement, due to its versatility and the ability to monitor a large geographical area. Recent advancement in wireless communication and electronics has enabled the development of low power consumption and low cost sensor network. There are different technical issues that researchers are currently resolving. Most of the attention however has...
Wireless sensor networks are more adaptive to habitat surveillance applications than other technique due to high distribution density and self-organization of tiny sensor nodes. This paper introduced a framework of wireless sensor networks combined with GPRS (General Packet Radio Service) for habitat monitoring. Detailed presentation of a novel sensor node making use of ARM technology and IEEE502...
We developed the wireless sensor network module with very low power consumption. The sleep current including LCD is 3.5 uA and average current is 5 uA with 10 second data sampling period. This module is expected to work with two AA batteries for 10 or more years. We tested some batteryless wireless sensor applications. The energy source includes solar, vibration and wind. The module can operate though...
This paper presents a distributed fermat-point range estimation strategy, which is important in the moving sensor localization applications. The fermat-point is defined as a point which minimizes the sum of distances from three sensors inside a triangle. This point is indeed at the trianglepsilas center of gravity. We solve the problems of large errors and poor performance in the bounding box algorithm...
Sink mobility has become an increasingly important requirement of various sensor network applications. Handling such mobile sink conditions brings new challenges to large-scale sensor networking. This investigation proposed a hybrid-structure routing protocol (HSRP) that combines the benefits of grid-based and cluster-based structures. Grid-based structure is designed to solve the cluster head selection...
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