JPS6197727U

JPS6197727U -

Info

Publication number: JPS6197727U
Application number: JP18315084U
Authority: JP
Priority date: 1984-12-04
Filing date: 1984-12-04
Publication date: 1986-06-23

Description

[Brief explanation of the drawing]

第１図はこの考案に係る静電容量式液体残量測
定回路の第１実施例を示すブロツク図、第２図は
同じく第２実施例を示すブロツク図、第３図は従
来の静電容量式液体残量測定回路を示すブロツク
図である。１１…静電容量式センサ、１１ａ，１１ｂ…電
極板対、１２…液体収容容器、１３…液体、１４
…ＣＲ型発振回路、１５…発振出力計測回路、１
６…満量センサ、１７…記憶回路、１８…乗算回
路、１９…除算回路、２０…表示回路。 Fig. 1 is a block diagram showing the first embodiment of the capacitive liquid level measuring circuit according to this invention, Fig. 2 is a block diagram showing the second embodiment, and Fig. 3 is a conventional capacitive circuit. FIG. 2 is a block diagram showing a liquid remaining amount measuring circuit according to the present invention. DESCRIPTION OF SYMBOLS 11... Capacitive sensor, 11a, 11b... Electrode plate pair, 12... Liquid storage container, 13... Liquid, 14
...CR type oscillation circuit, 15...Oscillation output measurement circuit, 1
6...Full sensor, 17...Memory circuit, 18...Multiplication circuit, 19...Division circuit, 20...Display circuit.

Claims

[Scope of utility model registration request]

It has a pair of electrode plates 11a and 11b disposed along the direction of change in the liquid level of the liquid 13 in the liquid storage container 12, and has a capacitance corresponding to the liquid-immersed surface area of the pair of electrode plates 11a and 11b. A capacitive sensor 11 that outputs a value, and a CR that uses the capacitance output from the capacitive sensor 11 as the capacitance for determining the oscillation output.
A type oscillation circuit 14 , an oscillation output measurement circuit 15 that measures the oscillation frequency or the size of the oscillation period that is the oscillation output of the oscillation circuit 14 , and an oscillation output measurement circuit 15 that measures whether the liquid 13 is fully contained in the container 12 or not. a full level sensor 16 that detects whether the liquid is full or not, and a full level sensor 16 that stores the oscillation output from the oscillation output measurement circuit 15 at the time of detection when the full level of liquid in the container 12 is detected by the full level sensor 16. A memory circuit 17;
Based on the oscillation output data stored in the storage circuit 17 and the maximum liquid capacity data of the container 12, the remaining amount of liquid corresponding to the magnitude of the oscillation output output from the oscillation output measurement circuit 15 at any time is proportionally calculated. A capacitance type liquid remaining amount measuring circuit characterized by comprising arithmetic circuits 18 and 19 for calculating the amount by calculation.