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Signal Processing for Error Reduction in a Hot-Wire Air Flow Sensor
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English
Abstract
The hot-wire(H/W) element of an air flow sensor has a tendency to indicate lower than actual flow rate when subjected to large-amplitude oscillatory flow. First, the causes for this measurement error is investigated and a new dynamic model for H/W is proposed. The dynamic model is a combination of the static non-linearity output characteristic of the H/W element and the dynamic response of the H/W element. Second, a signal processing method is developed to correct the measurement error of the H/W by inversing the proposed H/W dynamic model. The result shows that by using this signal processing method, the measurement error of the H/W is reduced.
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Citation
Kowatari, T., Arai, N., and Kobayashi, C., "Signal Processing for Error Reduction in a Hot-Wire Air Flow Sensor," SAE Technical Paper 980265, 1998, https://doi.org/10.4271/980265.Also In
References
- Arai N. et al. Advanced Design for Bypass Type of Hot Wire Air Flow Meter SAE Technical Paper Series # 900259
- Nishimura Y. et al. A Hot Wire Air Flow Meter for Intake Air Flow Measurement SAE Technical Paper Series # 890301
- Follmer W. C. Frequency Domain Characterization of Mass Air Flow Sensors SAE Technical Paper Series # 880561
- Ziesmer D. A. et al. Frequency Domain Characterization of Mass Airflow Sensors SAE Technical Paper Series # 930325