A self-validating algorithm for hot thermistor constant differential temperature air flow sensor

Author

Jiang, Changchuan ; Liu, Guangjun ; Jiang, Jin

Author_Institution

Dept. of Electr. & Comput. Eng., Western Ontario Univ., London, Ont.

fYear

2005

fDate

28-31 Aug. 2005

Firstpage

669

Lastpage

674

Abstract

A self-validating algorithm is proposed for hot thermistor constant differential temperature air flow sensor. Through this algorithm, the health of the sensor can be evaluated online, and a dynamic profile for assessment of measurement uncertainties is obtained. Such a profile is used to quantify the impact of faults occurred to the sensor. The impurity of the air and the harsh working environment cause deterioration of sensor performance and eventually lead to sensor malfunction. The paper examined several fault scenarios and demonstrated that the proposed scheme is able to detect and evaluate impacts of various types of fault

Keywords

fault diagnosis; flow control; flow measurement; flow sensors; measurement uncertainty; thermistors; air flow sensor; air impurity; constant differential temperature; hot thermistor; measurement uncertainty; self-validating algorithm; sensor malfunction; Coils; Control systems; Fault detection; Measurement uncertainty; Pollution measurement; Probes; Sensor systems; Temperature sensors; Thermal sensors; Thermistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Applications, 2005. CCA 2005. Proceedings of 2005 IEEE Conference on

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-9354-6

Type

conf

DOI

10.1109/CCA.2005.1507204

Filename

1507204