| 摘要 |
<P>PROBLEM TO BE SOLVED: To correct the variations in the series internal resistance component of an electrochemical gas sensor. <P>SOLUTION: When the supply of a charge current into the electrochemical gas sensor 1 from a power supply 33 is started, the resistance value of the series internal resistance component Rs in the equivalent circuit of the electrochemical gas sensor 1 is calculated, on the basis of the output voltage outputted from a current/voltage conversion circuit 40 and the resistance value of a resistor by a series internal resistance component calculating means 10a1. Then, the sensitivity data showing the sensitivity of the resistance value of the series internal resistance component Rs in the equivalent circuit with the output of the electrochemical gas sensor 1 is stored in a sensitivity data memory means 10b. Next, the sensitivity of the electrochemical gas sensor 1 is calculated, on the basis of the resistance value calculated by the series internal resistance component calculating means 10a1 and the sensitivity data stored in the sensitivity data memory means 10b by a sensitivity calculating means 10a2, and the concentration of the target gas produced in the electrochemical gas sensor 1 is corrected, on the basis of the sensitivity by a correction means 10a3. <P>COPYRIGHT: (C)2011,JPO&INPIT |
