Gas sensor system
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Sep 30, 2015
filing date -
Oct 1, 2014
priority date (Note) -
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Abstract
A gas sensor system (1) includes a gas sensor (2) having a cell (14) electrically communicating with a first terminal T1 and a second terminal T2, and a cell (24) electrically communicating with T2 and a third terminal T3; and a sensor control section (40) including detection circuits (41, 43) for detecting the terminal potentials V1, V3. The sensor control section includes circuit (44) for bringing T2 to an examination potential Vex; constant current circuits (47, 48) for supplying examination currents Ipoc, Icp; terminal potential detection means S5 for detecting V1, V3 before the gas sensor detects the gas concentration in an activated state, and in a state in which T2 is brought to examination potential Vex and Ipoc, Icp are supplied to the cells (14, 24); and wire breakage determination means S6, S10 for determining a wire breakage anomaly and its location based on the V1, V3.
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