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首页> 外文会议>International Symposium on Chemical and Biological Sensors and Analytical Methods II, 2001 >CORRECTION OF SENSOR INACCURACY ARISING FROM DRIFT BASED ON A SIGNAL PROCESSING TECHNIQUE
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CORRECTION OF SENSOR INACCURACY ARISING FROM DRIFT BASED ON A SIGNAL PROCESSING TECHNIQUE

机译：基于信号处理技术的传感器误差修正

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摘要

The instability of the dc operating point, commonly known as drift, limits sensor accuracy, particularly in long-term continuous monitoring applications. A compensation technique for correction of drift is presented. The proposed corrective scheme is based on signal analysis in the time-domain, and requires accurate characterization of drift as well as the ability to distinguish between drift and low frequency or 1/f noise. The theoretical basis for the proposed technique is presented and its validity is demonstrated experimentally based on in vitro continuous monitoring of pH under conditions approximating acute metabolic acidosis using a Si_3N_4gate pH-sensitive ISFET.
机译：直流工作点的不稳定性（通常称为漂移）限制了传感器的精度，尤其是在长期连续监测应用中。提出了一种校正漂移的补偿技术。所提出的校正方案基于时域中的信号分析，并且需要对漂移进行准确的表征以及区分漂移与低频或1 / f噪声的能力。提出了该技术的理论基础，并基于体外连续监测pH值，并使用Si_3N_4gate pH敏感ISFET在近似急性代谢性酸中毒的条件下通过实验证明了其有效性。

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