A high-precision NDIR CO2 gas sensor for automotive applications
A high-precision NDIR CO2 gas sensor for automotive applications
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DOI：
10.1109/jsen.2006.884440
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发表时间：
2006-12-01
影响因子：
4.3
通讯作者：
Tille, Thomas
中科院分区：
文献类型：
--
作者：
Frodl, Robert;Tille, Thomas
提出了一种用于汽车应用中恶劣环境条件下测量二氧化碳（CO2）的新型高精度光谱气体传感器。二氧化碳浓度是机舱空气质量检测的主要参数，也是空调系统中使用R744（二氧化碳）作为制冷剂时的重要安全参数。汽车环境对潜在的传感器原理提出了挑战，因为温度范围从-40 ° C到+85 ° C，大气压力从700到1050 mbar，相对湿度从0%到95%。所提出的传感器系统是基于非色散红外原理，具有达到高精度标准和提高长期稳定性的新功能。第二个IR源用于主IR源的内部重新校准、冗余目的和软件可扩展性检查。CO2传感器系统在整个温度、压力和湿度范围内的精度优于+/- 5.5%，分辨率低于15 ppm，响应时间短于5 s。传感器系统的工作时间超过6000小时，相应的使用寿命超过15年。实验结果表明，预期的汽车应用的出色结果。
A new high-precision spectroscopic gas sensor measuring carbon dioxide (CO2) for harsh environmental conditions of automotive applications is presented. The carbon dioxide concentration is the primary parameter for sensing in cabin air quality, as well as an important safety parameter when R744 (carbon dioxide) is used as the refrigerant in the air conditioning system. The automotive environment challenges the potential sensor principles because of the wide temperature range from -40 degrees C to +85 degrees C, the atmospheric pressure from 700 to 1050 mbar, and relative humidity from 0% to 95%. The presented sensor system is based on the nondispersive infrared principle with new features for reaching high precision criteria and for enhancing long-term stability. A second IR source is used for internal recalibration of the primary IR source, redundancy purposes, and software plausibility checks. The CO2 sensor system achieves an accuracy of better than +/- 5.5% over the whole temperature, pressure, and humidity ranges, with a resolution below 15 ppm and a response time shorter than 5 s. The operating time of the sensor system is more than 6000 h over a corresponding lifetime of more than 15 years. Experimental results show outstanding results for the intended automotive applications.