JPS6378262U

JPS6378262U -

Info

Publication number: JPS6378262U
Application number: JP17158486U
Authority: JP
Priority date: 1986-11-08
Filing date: 1986-11-08
Publication date: 1988-05-24

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の概略構成図、第２
図は不完全燃焼雰囲気中の電極電圧とセンサ電流
との関係線図、第３図は残存ＣＯ濃度および酸素
によるセンサ電流の比較線図である。１：不完全燃焼検知機能付き酸素測定器、２：
ジルコニアセンサ部、３：電子回路部、４：安定
化ジルコニア、５：電極、６：蓋、７：微小拡散
孔、１０：第１電源回路、１１：第２電源回路、
１３：電源切替回路、１４：信号処理回路、１５
：比較回路、１６：ホールド回路、Ａ：ＣＯによ
るセンサ電流、Ｂ：酸素によるセンサ電流。 Figure 1 is a schematic diagram of an embodiment of the present invention;
The figure is a relationship diagram between the electrode voltage and sensor current in an incomplete combustion atmosphere, and FIG. 3 is a comparison diagram of sensor current due to residual CO concentration and oxygen. 1: Oxygen measuring device with incomplete combustion detection function, 2:
Zirconia sensor section, 3: Electronic circuit section, 4: Stabilized zirconia, 5: Electrode, 6: Lid, 7: Micro diffusion hole, 10: First power supply circuit, 11: Second power supply circuit,
13: Power supply switching circuit, 14: Signal processing circuit, 15
: comparison circuit, 16: hold circuit, A: sensor current due to CO, B: sensor current due to oxygen.

Claims

[Scope of utility model registration request]

Stabilized zirconia is a solid electrolyte with good conductivity for oxygen ions, two electrodes are provided on both sides of the stabilized zirconia, and one of the electrodes is covered with micro diffusion holes. and a lid, in which a sensor current generated in a predetermined region of a voltage applied between the electrodes is proportional to the oxygen concentration around the electrode, the sensor depending on the oxygen concentration in a normal combustion state of the oxygen sensor. The first method is to set the electrode voltage to about 1.3 volts or less in order to detect the current without being affected by water vapor.
a power supply circuit; a second power supply circuit that sets an electrode voltage to approximately 1.3 volts or more in order to detect an increase in the sensor current due to carbon monoxide concentration generated in an incomplete combustion state; and the first and second power supply circuits. a power supply switching circuit that switches between each of the voltages to apply the voltage between the electrodes, a signal processing circuit that processes a sensor current of the oxygen concentration state based on the electrode voltage of the first power supply circuit, and incomplete combustion due to the electrode voltage of the second power supply circuit. 1. An oxygen meter with an incomplete combustion detection function, comprising: a comparison circuit that provides a comparison value having a predetermined setting level to the signal processing circuit in order to process the sensor current of the state.