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首页> 外文期刊>Sensors Journal, IEEE >Stability and Control of a Metal Oxide Gas Sensor in Simulated Wind
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Stability and Control of a Metal Oxide Gas Sensor in Simulated Wind

机译:模拟风中金属氧化物气体传感器的稳定性和控制

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摘要

Semiconducting metal oxide gas chemical sensors show promise for applications in handheld and personalized air quality monitoring systems. One limitation of these sensors is their cross-response to outdoor factors, such as temperature and humidity fluctuations. Previously, airflow (e.g., wind) was known to modify sensor output, but the cause of this response was not greatly characterized. In this paper, we investigate the effect of airflow on the output of a commercial metal oxide sensor in dry and humid air. Upon exposure to a step in airflow, the output of these sensors increases by more than 6% over 1 h. We also control the temperature of the sensor’s embedded heater resistor using an external proportional–integral controller. With this control, the sensor output after exposure to airflow increases by <1% over 1 h, demonstrating a stabilization scheme for air quality measurements that does not require additional temperature sensing equipment.
机译:半导体金属氧化物气体化学传感器显示出在手持式和个性化空气质量监测系统中的应用前景。这些传感器的局限性是它们对室外因素(例如温度和湿度波动)的交叉响应。以前,已知气流(例如风)会改变传感器的输出,但是这种响应的原因并没有得到很大的描述。在本文中,我们研究了干燥和潮湿空气中气流对商用金属氧化物传感器输出的影响。一旦暴露在气流中,这些传感器的输出将在1小时内增加6%以上。我们还使用外部比例积分控制器控制传感器嵌入式加热器电阻的温度。通过这种控制,暴露于气流后的传感器输出在1小时内增加了<1%,这表明了无需额外的温度感测设备的空气质量测量稳定方案。

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