Gas sensor and method of heating the same

Details Gas sensor and method of heating the same Gas sensor and method of heating the same

2005-07-26

2005-07-26

Hoang, Tu (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

C219S497000, C219S544000, C204S424000, C123S179100

Reexamination Certificate

active

06921883

ABSTRACT:
Temperature of a heater is controlled by switching an increasing rate of a resistance value of heating unit of the heater. During a period T1from a time point when heating of the heater is started until the resistance value of the heating unit reaches a reference value, the increasing rate is changed in multiple heating stages. In this manner, the temperature and the resistance value of the heating unit are increased. During a period T2from a time point when the resistance value of the heating unit reaches the reference value, feedback control is performed such that the resistance value is kept at the reference value as a target value.

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