Temperature modulation of a catalytic gas sensor.

Temperature modulation of a catalytic gas sensor.
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DOI:
10.3390/s141120372
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发表时间:
2014-10-29
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Lang W
Lang W
中科院分区:
其他
文献类型:
--
作者:
Brauns E;Morsbach E;Kunz S;Baeumer M;Lang W

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催化气体传感器的使用通常提供低选择性,仅基于它们由于不同的反应热而对各种气体的不同灵敏度。此外,不可能识别存在的气体,这导致传感器信号的可能误解。微机械催化气体传感器的使用在响应时间方面提供了很大的优势,这允许对传感器响应进行高级分析。通过使用温度调制,可以测量关于气体特性的附加信息,并且可以避免由材料移位或环境温度变化引起的漂移效应。在这项工作中,小型化的催化气体传感器,提供了一个非常短的响应时间(<150 ms)的开发。在调制温度下运行,可以根据Arkyius方法分析具有高级信息内容的信号频谱。因此,开发了一种高精度的电子设备,因为理论表明,必须避免由电子设备引起的谐波,以产生可理解的信号。
The use of catalytic gas sensors usually offers low selectivity, only based on their different sensitivities for various gases due to their different heats of reaction. Furthermore, the identification of the gas present is not possible, which leads to possible misinterpretation of the sensor signals. The use of micro-machined catalytic gas sensors offers great advantages regarding the response time, which allows advanced analysis of the sensor response. By using temperature modulation, additional information about the gas characteristics can be measured and drift effects caused by material shifting or environmental temperature changes can be avoided. In this work a miniaturized catalytic gas sensor which offers a very short response time (<150 ms) was developed. Operation with modulated temperature allows analysis of the signal spectrum with advanced information content, based on the Arrhenius approach. Therefore, a high-precise electronic device was developed, since theory shows that harmonics induced by the electronics must be avoided to generate a comprehensible signal.
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