Air filter particulate loading detection using smartphone audio and optimized ensemble classification
Author(s)
Siegel, Joshua E
Bhattacharyya, Rahul
Kumar, Sumeet
Sarma, Sanjay E
Date Issued
November 2017
Journal
Engineering Applications of Artificial Intelligence
Publisher
Elsevier
Citation
Siegel, Joshua et al. "Air filter particulate loading detection using smartphone audio and optimized ensemble classification." Engineering Applications of Artificial Intelligence 66 (November 20117): 104-112 © 2017 Elsevier
Version
Original manuscript
Abstract
Automotive engine intake filters ensure clean air delivery to the engine, though over time these filters load with contaminants hindering free airflow. Today’s open-loop approach to air filter maintenance has drivers replace elements at predetermined service intervals, causing costly and potentially harmful over- and under-replacement. The result is that many vehicles consistently operate with reduced power, increased fuel consumption, or excessive particulate-related wear which may harm the catalyst or damage machined engine surfaces.
We present a method of detecting filter contaminant loading from audio data collected by a smartphone and a stand microphone. Our machine learning approach to filter supervision uses Mel-Cepstrum, Fourier and Wavelet features as input into a classification model and applies feature ranking to select the best-differentiating features. We demonstrate the robustness of our technique by showing its efficacy for two vehicle types and different microphones, finding a best result of 79.7% accuracy when classifying a filter into three loading states.
Refinements to this technique will help drivers supervise their filters and aid in optimally timing their replacement. This will result in an improvement in vehicle performance, efficiency, and reliability, while reducing the cost of maintenance to vehicle owners.
Keywords: Data mining and knowledge discovery; Machine learning; Emerging applications and technology; Intelligent vehicles; Ambient intelligence
MIT Department
Massachusetts Institute of Technology. Digital Signal Processing Group
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.engappai.2017.09.015
