Abstract
In modern smart buildings, the temperature measurement is crucial for smart temperature management implemented by a cyber-physical system (CPS). However, sensor drift emerges during the measurement and becomes an intractable obstacle to practical temperature measurement. Previous works on calibrating sensor drift either limit the number of drifted sensors or heavily rely on the partial information about the sensing matrix. In this paper, we establish a sensor spatial correlation model to calibrate drifts. Given prior knowledge, maximum-a-posteriori (MAP) is harnessed to estimate the coefficients of our model, which is formulated as a non-convex problem with three hyper-parameters. An alternating-based optimization method is proposed to solve this non-convex problem. Cross-validation and expectation-maximum with Gibbs sampling are exploited to tune hyper-parameters. Experimental results demonstrate that compared to state-of-the-art methods, the proposed framework can achieve a robust drift calibration and a better trade-off between accuracy and runtime on benchmarks generated by simulator EnergyPlus.
ⒸT. Chen et al. — ACM 2019. This is a minor revision of the work published in DAC’19, June 2–6, 2019, Las Vegas, NV, USA https://doi.org/10.1145/3316781.3317909
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Chen, T., Lin, B., Geng, H., Yu, B. (2020). Smart Building Sensor Drift Calibration. In: Hu, S., Yu, B. (eds) Big Data Analytics for Cyber-Physical Systems. Springer, Cham. https://doi.org/10.1007/978-3-030-43494-6_8
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DOI: https://doi.org/10.1007/978-3-030-43494-6_8
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