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A wireless sensor enabled by wireless power.

Da-Sheng Lee1, Yu-Hong Liu, Chii-Ruey Lin

  • 1Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, No. 1, Sec. 3,Chung-Hsiao E. Rd., Taipei 106, Taiwan. f11167@ntut.edu.tw

Sensors (Basel, Switzerland)
|February 28, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a wireless sensor enabled by wireless power (WPWS), featuring a dual antenna for energy harvesting and data transmission. WPWS offers a fully wireless solution for sensor networks, particularly in hazardous areas.

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Area of Science:

  • Sensor Technology
  • Wireless Communication
  • Energy Harvesting

Background:

  • Traditional wireless sensor networks often require batteries or wired power sources.
  • Existing wireless sensors have limitations in power autonomy and data transmission capabilities.

Purpose of the Study:

  • To propose and fabricate a prototype of a wireless sensor enabled by wireless power (WPWS).
  • To integrate wireless power harvesting and data communication into a single sensor node.
  • To evaluate the performance of WPWS in terms of range, data transmission, and accuracy.

Main Methods:

  • Designed a dual antenna structure: one for power harvesting (915 MHz RFID band) and one for data communication (Modbus protocol).
  • Fabricated a WPWS node integrating wireless power and sensor modules with chip-type sensors.
  • Tested WPWS prototypes with temperature, humidity, optical, and airflow sensors using a standard UHF RFID reader.

Main Results:

  • Achieved wireless power and data transmission up to 4m diameter using a standard UHF RFID reader.
  • WPWS nodes successfully transmitted dynamic sensor data within 8 seconds.
  • Sensor accuracy showed within 8% deviation compared to laboratory equipment.

Conclusions:

  • WPWS technology enables a totally wireless sensor network with advantages over passive RFID tags.
  • The star topology limitation due to shielding effects needs further research.
  • WPWS offers potential for extending sensor network applications in hazardous environments.