| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately calculate a sensitivity coefficient by a simple method. <P>SOLUTION: An alcohol sensor 24A detects physical quantity corresponding to physical quantity related to a concentration of ethanol gas and physical quantity related to humidity, and outputs a detection value. A humidity sensor 24B detects and outputs the physical quantity related to the humidity. A temperature sensor 24D detects and outputs a temperature. A data storage part 44 stores a plurality of data sets indicating a combination of the detection value of the alcohol sensor 24A, the detection value of the humidity sensor 24B and the detection value of the temperature sensor 24D. A data retrieval part 46 retrieves the latest data sets whose temperature are same and a difference of humidity between them is more than the predetermined value. A sensitivity coefficient calculation part 48 calculates a sensitivity coefficient of the alcohol sensor 24A based on the retrieved data sets. <P>COPYRIGHT: (C)2012,JPO&INPIT |
