| 摘要 |
PURPOSE:To miniaturize an apparatus and make it unexpensive, by constituting so as to operate the oxygen concentration of fuel gas and deviation of a regulation target by one arithmetic unit basing on an output signal of an oxygen concentration sensor and temperature sensor. CONSTITUTION:A detection signal of a temperature sensor 15 is inputted into a comparator 28 by an amplifier 26 and a demultiplexer 24 through an alteration switch 27 controlled by a prescribed timing and said signal is compared with a standard signal inputted from a microprocessor (muP)21 through a DA converter 30. Then, a digital value Tx of absolute temperature of the detection signal is determined. Next, a digital value Ex of the detection signal of an oxygen concentration sensor 14 is determined in the same way and is housed in an EPROM 22. The concentration of oxygen is computed from the values Ex and Tx by a Nernst expression by the muP21 and it is displayed 17. Next, the regulation target value is taken in the muP21 from a target set device 18 through a decoder 35 and deviation is computed and then, is given to a regulator 19. The apparatus is miniaturized and made unexpensive because of using only one muP21. |
