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Sensor Networks: WISAN

WISAN is Wireless Intelligent Sensor and Actuator Network. Existing sensor network do not completely satisfy requirements of problems posed by structural health monitoring: the proactive, constant data rate character of the data streams rather than traditional reactive, event-driven data delivery; mostly static node placement on structures with limited number of mobile nodes; real-time requirements to bidirectional data flow from sensors and to actuators.

WISAN is designed to address these issues and support massive arrays of heterogeneous sensors with constant data streams. The network interface is based on IEEE 802.15.4 standard.

WISAN has the following key features:

  1. WISAN provides low-cost massive data acquisition from arrays of heterogeneous sensors with constant data streams.
  2. Due to very low power consumption, WISAN utilizes low-cost power harvesting technologies or lasts years on a single battery.
  3. WISAN can be utilized worldwide in 2.4Ghz ISM frequency band and coexists with WiFi and other devices.
  4. The sensor nodes perform energy-efficient distribution of computational load by performing on-board compression, signal generation for actuators and evaluation of fuzzy rules.
  5. Each node on the network is synchronized with other nodes on the order of microseconds. The synchronization is periodically updated. This guarantees data acquisition by all nodes at the same time.
  6. Bandwidth utilization is maximized through bandwidth scheduling allowing to increase number of nodes in the network by factor of five.
  7. Hardware design of the nodes allows to perform self-localization of the nodes, that is establish relative position of each node to others.

WISAN design has been supported by and

WISAN platform

Click on image for larger view

    

PAN coordinator (supernode)

Wireless accelerometer

WISAN features and accesories:

 Stacking design  A sensor board: temperature, humidity, acceleration and dynamic strain

 Graphic LCD. Front view.  Graphic LCD. Back view.

 Battery JTAG  Breadboard adapter and JTAG

 WISAN Protoboard

WISAN:Structural Health Monitoring and Damage Prognosis

WISAN is targeted toward applications of structural health monitoring. The general view of the suggested systems is given below. Time permitting, I will add more information on this project, but additional info can always be found in my publications.

 
 
 

Berkeley Motes

Wirless sensor network, Berkeley sensor network, MOTES, routing, TinyOS, wireless sensor, routing,
 

Sensor networks

Sensor networks, ultra-low power sensor nodes, 802.15.4, wireless sensors, low rate wireless personal area networks, WLAN, WPAN, wireless sensor network topology, network architecture, sensor power consumption, 2.4Ghz frequency band, receiver sensitivity, sensor network architecture, WISAN, ISM band, self-organizing network, AES security, quality of service QOS, Zigbee, wireless Zigbee, wireless 802.15.4 physical layer, MAC layer, network layer, ad-hoc networks.

Channel access in sensor networks, Access control, peer-to-peer topology, data rate 1Mbps, data rate 250Kbps, data services, star topology, peer-to-peer topology, two-layer cluster tree, 2.4Ghz, MAC data transfer, wireless structural monitoring, wireless sensors, wireless accelerometers, autonomous damage detection, beacon, localization in sensor networks, global time synchronization, beacon frames, data frames.

Motes, Tiny OS, real-time kernel, preemptive scheduling, ultra-low power OS, preemptive sensor kernel, data acquition, berkley motes, cricket, multitasking in sensor network, fuzzy kernel, localization in sensor networks, 900Mhz, Industrial Scientific Medical band, open-source sensor network, mesh topology, cluster topology, cluster tree topology, WISAN, 802.15 Zigbee, Zigbee Alliance, direct sequence spread spectrum, contant-envelope modulation, production samples, Chipcon CC2420, low power sensor nodes, design services, sensor network research, 2420 Chipcon, low-power wireless sensor, better than motes.

Channel access in sensor networks, Access control, peer-to-peer topology, data rate 1Mbps, data rate 250Kbps, data services, star topology, peer-to-peer topology, two-layer cluster tree, 2.4Ghz, MAC data transfer, wireless structural monitoring, wireless sensors, wireless accelerometers, autonomous damage detection, beacon, localization in sensor networks, global time synchronization, beacon frames, data frames. Sensor networks, ultra-low power sensor nodes, 802.15.4, wireless sensors, low rate wireless personal area networks, WLAN, WPAN, wireless sensor network topology, network architecture, sensor power consumption, 2.4Ghz frequency band, receiver sensitivity, sensor network architecture, ISM band, self-organizing network, AES security, quality of service QOS, Zigbee, wireless Zigbee, wireless 802.15.4 physical layer, MAC layer, network layer, ad-hoc networks, Motes, Tiny OS, real-time kernel, preemptive scheduling, ultra-low power OS, preemptive sensor kernel, data acquition, berkley motes, cricket, multitasking in sensor network, fuzzy kernel, localization in sensor networks, 900Mhz, Industrial Scientific Medical band, open-source sensor network, mesh topology, cluster topology, cluster tree topology, 802.15 Zigbee, Zigbee Alliance, direct sequence spread spectrum, contant-envelope modulation, production samples, Chipcon CC2420, low power sensor nodes, design services, sensor network research, 2420 Chipcon, low-power wireless sensor, better than motes.

Structural Health Monitoring

Structural health monitoring of civil infrastructure, bridge monitoring, wireless sensors, vibration sensors, wireless sensor network, MEMS accelerometer, wireless accelerometer, structural health management, wireless actuator, RFID sensor, SHM, NDE, NDT, wireless temperature sensor, energy harvesting, vibration-based damage detection, strain energy method, monitoring of civil infrastructure, WISAN, Wireless Intelligent Sensor and Actuator Network, damage detection, condition assessement, remaining life prediction, fuzzy expert system for damage detection, strain energy mode shapes, AVLB.

Natural frequencies, damage detection, modal strain energy, damage detection from ambient vibrations, wireless data acquisition, MEMS accelerometer, wireless sensor network, change in modal parameters, change in natural frequencies, environmental change, wireless sensor network, piezoceramic patch, modal damage detection, field testing of bridges, AVLB, wireless accelerometer.

Structural health monitoring of civil infrastructure, bridge monitoring, wireless sensors, vibration sensors, wireless sensor network, MEMS accelerometer, wireless accelerometer, structural health management, wireless actuator, RFID sensor, SHM, NDE, NDT, wireless temperature sensor, energy harvesting, vibration-based damage detection, strain energy method, monitoring of civil infrastructure, WISAN, Wireless Intelligent Sensor and Actuator Network, damage detection, condition assessement, remaining life prediction, fuzzy expert system for damage detection, strain energy mode shapes, AVLB, natural frequencies, damage detection, modal strain energy, damage detection from ambient vibrations, wireless data acquisition, MEMS accelerometer, wireless sensor network, change in modal parameters, change in natural frequencies, environmental change, wireless sensor network, piezoceramic patch, modal damage detection, field testing of bridges, AVLB, wireless accelerometer.

Natural frequencies, damage detection, modal strain energy, damage detection from ambient vibrations, wireless data acquisition, MEMS accelerometer, wireless sensor network, change in modal parameters, change in natural frequencies, environmental change, wireless sensor network, WISAN, piezoceramic patch, modal damage detection, field testing of bridges, AVLB, wireless accelerometer,

Structural health monitoring of civil infrastructure, bridge monitoring, wireless sensors, vibration sensors, wireless sensor network, MEMS accelerometer, wireless accelerometer, structural health management, wireless actuator, RFID sensor, SHM, NDE, NDT, wireless temperature sensor, energy harvesting, vibration-based damage detection, strain energy method, monitoring of civil infrastructure, WISAN, Wireless Intelligent Sensor and Actuator Network, damage detection, condition assessement, remaining life prediction, fuzzy expert system for damage detection, strain energy mode shapes, AVLB.