公开(公告)号：US20140191773A1

公开(公告)日：2014-07-10

申请号：US14138433

申请日：2013-12-23

Applicant: DENSO CORPORATION

Inventor： Masaki SAIJOH ,  Takamasa OGURI ,  Kouji MORISHITA

IPC: G01R35/00 ,  G01N27/04

CPC classification number: G01N27/4175

Abstract: A control device for controlling an oxygen concentration sensor includes: a voltage sweeping unit for applying a voltage to the sensor for a time interval during an impedance detection process; a pre-sweeping voltage memory for storing a terminal voltage of the sensor as an initial terminal voltage just before applying the voltage; an impedance detection unit for detecting an element impedance; a voltage returning unit for returning the terminal voltage to the initial terminal voltage after a predetermined time interval has elapsed; a monitoring unit for monitoring the terminal voltage after the voltage returning unit starts returning the terminal voltage; a determination unit for determining whether a monitored terminal voltage of the sensor reaches a stored terminal voltage in the memory; and a stop unit for stopping a returning operation of the voltage returning unit when the monitored terminal voltage reaches the stored terminal voltage.

Abstract translation: 用于控制氧浓度传感器的控制装置包括：电压扫描单元，用于在阻抗检测过程期间以一段时间间隔向传感器施加电压; 用于在施加电压之前将传感器的端子电压存储为初始端电压的预扫描电压存储器; 用于检测元件阻抗的阻抗检测单元; 电压返回单元，用于在经过预定时间间隔之后将端子电压返回到初始端子电压; 监视单元，用于在电压返回单元开始返回端子电压之后监视端子电压; 确定单元，用于确定所述传感器的被监控终端电压是否达到所述存储器中存储的终端电压; 以及停止单元，用于当所监视的端子电压达到所存储的端子电压时停止所述电压返回单元的返回操作。