Title :
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.
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;
Conference_Titel :
Control Applications, 2005. CCA 2005. Proceedings of 2005 IEEE Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-9354-6
DOI :
10.1109/CCA.2005.1507204
