公开(公告)号：US20240003842A1

公开(公告)日：2024-01-04

申请号：US18468058

申请日：2023-09-15

Applicant: DENSO CORPORATION

Inventor： Takashi HIRAYAMA

IPC: G01N27/409 ,  G01N27/419

CPC classification number: G01N27/409 ,  G01N27/419

Abstract: A sensor control apparatus of a gas concentration detecting apparatus is provided with a sensor detecting unit, a temperature detecting unit, a heater control unit, a change rate calculation unit and a calibration outputting unit. The change rate calculation unit calculates a change rate of a heater current flowing through a heater when a heater control unit maintains the temperature of a sensor cell detected by a temperature detecting unit to be at a target temperature. The calibration outputting unit utilizes a change rate of a heater current to calibrate the sensor output as a sensor current detected by the sensor detecting unit and calculates a sensor calibration output of a gas sensor.

公开(公告)号：US20190391109A1

公开(公告)日：2019-12-26

申请号：US16451285

申请日：2019-06-25

Applicant: DENSO CORPORATION

Inventor： Shota HAGINO ,  Masatoshi IKEDA ,  Makoto ITO ,  Zhenzhou SU ,  Hao WU ,  Takashi HIRAYAMA ,  Daisuke KAWAI ,  Satoshi NAKAMURA

IPC: G01N27/407 ,  G01N27/409

Abstract: A gas sensor is equipped with a sensor device made of a stack of a solid electrolyte body, a sensor electrode, a reference electrode, a first insulator, a second insulator, a gas chamber, a reference gas duct, a heater, and a heat transfer member. The heater has a heating element at least partially overlapping the sensor electrode and the reference electrode. The heat transfer member is made of a dense metallic oxide material which blocks passage of measurement gas therethrough. The heat transfer member is held between the sensor electrode and the first insulator in which the heater is embedded within the gas chamber and works to facilitate transfer of thermal energy, as generated by the heater, to the solid electrolyte body, the sensor electrode, and the reference electrode. This results in enhanced thermal conductivity of the sensor device and achieves quick activation of the sensor device.