JPH0360061U

JPH0360061U -

Info

Publication number: JPH0360061U
Application number: JP11974189U
Authority: JP
Priority date: 1989-10-16
Filing date: 1989-10-16
Publication date: 1991-06-13

Description

[Brief explanation of the drawing]

第１図は本考案の構成図、第２図は本考案の一
実施例を示す回路図、第３図はアルコール濃度セ
ンサの充電特性図、第４図は本考案の一実施例の
フローチヤート、第５図は従来の回路図である。１……アルコール濃度センサ、１１……定電流
回路、１２……ワンシヨツトマルチバイブレータ
、１３……スイツチ、Ｔｒ_２……トランジスタ。 Figure 1 is a configuration diagram of the present invention, Figure 2 is a circuit diagram showing an embodiment of the invention, Figure 3 is a charging characteristic diagram of an alcohol concentration sensor, and Figure 4 is a flowchart of an embodiment of the invention. , FIG. 5 is a conventional circuit diagram. 1... Alcohol concentration sensor, 11... Constant current circuit, 12... One-shot multivibrator, 13... Switch, Tr ₂ ... Transistor.

Claims

[Claims for Utility Model Registration] In an alcohol concentration detection device that detects the concentration of alcohol in an alcohol mixed liquid using an alcohol concentration sensor whose capacitance changes based on the concentration of alcohol, the alcohol concentration sensor is charged. a constant current circuit for supplying a constant current; a switch means for connecting and disconnecting the alcohol concentration sensor and the constant current circuit; and a switch control means for turning on the switch means for a preset period of time. , measuring means for measuring the voltage of the alcohol concentration sensor after a predetermined time has elapsed since the switch means is turned on; An alcohol concentration detection device comprising: a discharge means for discharging voltage;