| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system capable of accurately knowing the quantity of water in the fuel cell stack, and thereby capable of obtaining high power generation efficiency. <P>SOLUTION: The fuel cell system is provided with a fuel cell which generates power by receiving supply of an oxidizer gas and a fuel gas. The system is provided with an ultrasonic transmitter 10, an ultrasonic receiver 11, and a detector 12 which detects gas component state in the fuel cell stack 20, based on the oscillation waveform transmitted from the ultrasonic transmitter 10 and the receiving waveform received by the ultrasonic receiver 11. <P>COPYRIGHT: (C)2007,JPO&INPIT |
