JPS6172638U

JPS6172638U -

Info

Publication number: JPS6172638U
Application number: JP15745184U
Authority: JP
Priority date: 1984-10-18
Filing date: 1984-10-18
Publication date: 1986-05-17

Description

[Brief explanation of the drawing]

第１図は本考案装置の一実施例の回路構成図、
第２図は第１図示の装置各部の信号波形図、第３
図は本考案装置の検出機構の一実施例の断面図、
第４図は従来装置の一例の回路図、第５図は第４
図示の装置各部の信号波形図、第６図は圧力脈動
を説明するための図である。４ａ，４ｂ…センサ、９ａ，９ｂ…プリアンプ
、１０…減算器、２０…加算器、２１…アナログ
スイツチ、２２，２３…絶対値回路、２４…コン
パレータ。 FIG. 1 is a circuit diagram of an embodiment of the device of the present invention;
Figure 2 is a signal waveform diagram of each part of the device shown in Figure 1.
The figure is a sectional view of an embodiment of the detection mechanism of the device of the present invention.
Figure 4 is a circuit diagram of an example of a conventional device, and Figure 5 is a circuit diagram of an example of a conventional device.
FIG. 6, a signal waveform diagram of each part of the illustrated apparatus, is a diagram for explaining pressure pulsation. 4a, 4b...Sensor, 9a, 9b...Preamplifier, 10...Subtractor, 20...Adder, 21...Analog switch, 22, 23...Absolute value circuit, 24...Comparator.

Claims

[Scope of utility model registration request]

A flow velocity/flow rate detection device having a pair of sensors that detects the flow of fluid and differentially generates a detection signal, a subtraction circuit that obtains a subtracted signal by subtracting the detection signals of each of the pair of sensors; an addition circuit that obtains an addition signal by adding up the detection signals of the respective sensors; a comparison circuit that compares the absolute value of the subtraction signal and the addition signal, or a value corresponding to the absolute value; A flow velocity/flow rate detection device comprising a switch circuit that takes out the subtraction signal only when the value corresponding to the absolute value becomes large.