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Wireless Remote Weather Monitoring System Based on MEMS Technologies

机译：基于MEMS技术的无线远程天气监测系统

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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.
机译：这项研究提出了一种基于微机电系统（MEMS）和无线传感器网络（WSN）技术的无线远程天气监控系统，该系统包括用于测量温度，湿度，压力，风速和风向的传感器，并集成在单个芯片上。在放大和模数转换（ADC）之后，使用WSN技术在八达通II-A传感器节点之间传输传感信号。实验结果表明，微型温度传感器的电阻随输入温度线性增加，平均TCR（电阻温度系数）值为8.2×10 -4 （°C -1 < / sup>）。压力传感器的电阻也随气压线性增加，平均灵敏度值为3.5×10 -2 （Ω/ kPa）。由于温度对介电常数的影响，对湿度的敏感性随环境温度的升高而增加，在27°C，30°C，40°C时，介电常数确定为16.9、21.4、27.0和38.2（pF /％RH）和分别为50°C。通过将气流经过传感器时电阻响应的变化相加来获得气流速度，从而提供了4.2×10 -2 ，9.2×10 -2 ，9.7× 10 −2 （Ω/ ms -1 ），加热电阻的功耗分别为0.2、0.3和0.5W。空气穿过流量传感器的表面会促使每个感应电阻之间的温度变化。评估由温度变化引起的电阻变化，可以测量风向。

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