JPH01141411U

JPH01141411U -

Info

Publication number: JPH01141411U
Application number: JP3894288U
Authority: JP
Priority date: 1988-03-24
Filing date: 1988-03-24
Publication date: 1989-09-28

Description

[Brief explanation of the drawing]

第１図は本考案の１実施例の構成を示すブロツ
ク図、第２図は第１図に示す実施例の動作を示す
波形図、第３図は第１図に示すトラツキング波
器の他の構成を示すブロツク図、第４図は従来の
トラツキング波器の構成を示すブロツク図、第
５図は第４図に示すトラツキング波器の動作を
説明する波形図、第６図は第４図に示す従来のト
ラツキング波器の問題点を説明する波形図であ
る。１０…可変低域波器、１１…増幅器、１２…
シユミツトトリガ回路、１３…周波数／電圧変換
器、１４…渦センサ、１５…チヤージコンバータ
、１６…トラツキング波器、ｑ…渦電荷、ＳＶ
…渦信号、ＶＱ…波出力、ＦＶＯ…周波数信号
、ＶＣ…制御信号。 FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a waveform diagram showing the operation of the embodiment shown in FIG. 1, and FIG. 3 is an alternative to the tracking waveform shown in FIG. FIG. 4 is a block diagram showing the configuration of a conventional tracking wave device, FIG. 5 is a waveform diagram explaining the operation of the tracking wave device shown in FIG. 4, and FIG. FIG. 2 is a waveform diagram illustrating problems of the conventional tracking waveform shown in FIG. 10...Variable low frequency device, 11...Amplifier, 12...
Schmitt trigger circuit, 13... Frequency/voltage converter, 14... Eddy sensor, 15... Charge converter, 16... Tracking wave device, q... Eddy charge, S V
...vortex signal, VQ...wave output, FVO...frequency signal, VC...control signal.

Claims

[Scope of utility model registration request]

signal conversion means for converting the measured flow rate into a vortex signal;
a low-frequency wave means for converting the vortex signal into a low-frequency wave; a frequency conversion means for converting the output of the low-frequency wave means into a frequency signal corresponding to the measured flow rate; 1. A vortex flowmeter comprising: amplitude detection means for outputting a control signal corresponding to the amplitude detection means; and changing means for changing the corner frequency of the low frequency means based on the control signal.