The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2024
Filed:
Oct. 08, 2020
Ngk Spark Plug Co., Ltd., Nagoya, JP;
Yuzo Higuchi, Nagoya, JP;
Yuji Oi, Nagoya, JP;
Satoru Toda, Nagoya, JP;
Satoru Abe, Nagoya, JP;
Junichiro Mitsuno, Nagoya, JP;
Hidetoshi Makino, Nagoya, JP;
NITERRA CO., LTD., Nagoya, JP;
Abstract
A sensor system (S) including a current DA converter () outputting a control current (Ip) of a sensor element (S), a control unit (C) generating a control current instruction value (Ipcmd) corresponding to magnitude of the control current and inputting this instruction value to the current DAC, an instruction value sequence generating unit () generating, instead of the control current instruction value, an inspection instruction value sequence (RChcmd) in which predetermined inspection current instruction values (Chcmd) inputted to the current DAC are arranged in order and by which failure of the current DAC can be detected, an inspection current detection unit () detecting an inspection current value (Ichv) of an inspection current (Ich) outputted from the current DAC, and a failure detection unit () detecting failure of the current DAC from an inspection current value sequence (RIchv) in which the inspection current values are arranged in order of detection.