用于测量污垢厚度、液体流速和表面接触的3-Ω法

Clausen Casper, Pedersen Tim, Bentien Anders

Department of Engineering, Aarhus University, Hangoevej 2, 8200 Aarhus N, Denmark.

Sensors (Basel). 2017 Mar 9;17(3):552. doi: 10.3390/s17030552.

The 3-omega method is conventionally used for the measurement of thermal conductivity in solid samples. The present work includes the experimental characterization and proof-of-concept measurements of sensor concepts, based on the 3-omega method. It is shown that this method can be used to measure fouling layers with a thickness of 10 to 400 μm, to conduct the measurement of flow rates with a high precision, and finally, as a simple on-off contact sensor with a fast response time.

传统上，3-ω方法用于测量固体样品的热导率。目前的工作包括基于3-ω方法的传感器概念的实验表征和概念验证测量。结果表明，该方法可用于测量厚度为10至400μm的污垢层，高精度地测量流速，最后还可作为一种响应时间快的简单通断接触式传感器。