Wireless remote weather monitoring system based on MEMS technologies

20Citations
Citations of this article
28Readers
Mendeley users who have this article in their library.

Abstract

This study proposes a wireless remote weather monitoring system based on Micro-Electro-Mechanical Systems (MEMS) and wireless sensor network (WSN) technologies comprising sensors for the measurement of temperature, humidity, pressure, wind speed and direction, integrated on a single chip. The sensing signals are transmitted between the Octopus II-A sensor nodes using WSN technology, following amplification and analog/digital conversion (ADC). Experimental results show that the resistance of the micro temperature sensor increases linearly with input temperature, with an average TCR (temperature coefficient of resistance) value of 8.2 × 10-4 (°C-1). The resistance of the pressure sensor also increases linearly with air pressure, with an average sensitivity value of 3.5 × 10-2 (Ω/kPa). The sensitivity to humidity increases with ambient temperature due to the effect of temperature on the dielectric constant, which was determined to be 16.9, 21.4, 27.0, and 38.2 (pF/%RH) at 27 °C, 30 °C, 40 °C, and 50 °C, respectively. The velocity of airflow is obtained by summing the variations in resistor response as airflow passed over the sensors providing sensitivity of 4.2 × 10-2, 9.2 × 10-2, 9.7 × 10-2 (Ω/ms-1) with power consumption by the heating resistor of 0.2, 0.3, and 0.5 W, respectively. The passage of air across the surface of the flow sensors prompts variations in temperature among each of the sensing resistors. Evaluating these variations in resistance caused by the temperature change enables the measurement of wind direction. © 2011 by the authors; licensee MDPI, Basel, Switzerland.

Author supplied keywords

Cite

CITATION STYLE

APA

Ma, R. H., Wang, Y. H., & Lee, C. Y. (2011). Wireless remote weather monitoring system based on MEMS technologies. Sensors, 11(3), 2715–2727. https://doi.org/10.3390/s110302715

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free