JPH0248820U - - Google Patents
Info
- Publication number
- JPH0248820U JPH0248820U JP12769588U JP12769588U JPH0248820U JP H0248820 U JPH0248820 U JP H0248820U JP 12769588 U JP12769588 U JP 12769588U JP 12769588 U JP12769588 U JP 12769588U JP H0248820 U JPH0248820 U JP H0248820U
- Authority
- JP
- Japan
- Prior art keywords
- vortex
- capacitance
- pressure
- restriction
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012528 membrane Substances 0.000 claims 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は、本考案の渦流量計検出器の一実施例
を説明するための構成図、第２図は、他の実施例
を示す構成図、第３図は第２図の駆動回路のブロ
ツク図、第４図は、本考案の他の実施例を示す図
、第５図は従来技術を説明するための図である。
１０…渦流量計本体、１２…渦発生体、２０…
ケーシング、２１，２２…空室、６０…連通路、
２９…絞り。
Fig. 1 is a block diagram for explaining one embodiment of the vortex flowmeter detector of the present invention, Fig. 2 is a block diagram showing another embodiment, and Fig. 3 is a block diagram of the drive circuit of Fig. 2. The block diagram, FIG. 4, is a diagram showing another embodiment of the present invention, and FIG. 5 is a diagram for explaining the prior art. 10... Vortex flowmeter body, 12... Vortex generator, 20...
Casing, 21, 22...Vacancy, 60...Communication passage,
29...Aperture.
Claims (1)
つの空室の各々の上部壁面に絶縁固着した固定電
極と、前記空室を２分し、該固定電極の各々に等
しい距離を隔てて配設された可動電極とにより形
成される一対の静電容量と、空室上部壁面の各々
を貫通して静電容量空室に連通する連通路と、渦
変動圧を空室下部に導入する導通路とを穿設し、
渦信号を一対の静電容量の各々の静電容量差とし
て検知する常圧気体流量計において、前記導圧路
に絞りを配設し、その絞り量と、絞りと静電容量
空室とで形成されるおくれ要素の遮断周波数を、
流量に従つて変化する静電容量差を規定値にする
渦信号周波数としたことを特徴とする渦流量計検
出器。 ２ 絞り手段を、静電容量差信号と、規定値電圧
発生器と、静電容量差信号および規定値電圧を、
比較する比較回路と、該比較回路の出力により絞
り機構を駆動する絞り駆動回路と、該駆動回路の
出力に応動して導通路を一定量絞る絞り素子とで
構成した請求項第１項記載の渦流量計変換器。 ３ 絞り手段を、圧力に応動して撓み変位する可
撓膜を僅かに隔てて対向した絞り室とし、流量計
本体の渦発生体上流側圧力および下流側圧力を絞
り室外部より各々の可撓膜に印加したことを特徴
とする請求項第１項記載の渦流量計変換器。[Scope of claims for utility model registration] 1. 2.
A pair of electrostatic charges formed by a fixed electrode insulated and fixed to the upper wall surface of each of the two empty chambers, and a movable electrode that divides the empty chamber into two and is arranged at an equal distance from each of the fixed electrodes. A communication passage that penetrates the capacitance and the upper wall of the cavity to communicate with the capacitance cavity, and a conduction passage that introduces the vortex fluctuating pressure to the lower part of the cavity,
In a normal pressure gas flowmeter that detects a vortex signal as a capacitance difference between a pair of capacitances, a restriction is provided in the pressure conduction path, and the amount of restriction is determined by the difference between the restriction and the capacitance space. The cutoff frequency of the lag element that is formed is
A vortex flow meter detector characterized in that the vortex signal frequency is set to a specified value for the capacitance difference that changes according to the flow rate. 2. The throttle means, the capacitance difference signal, the specified value voltage generator, the capacitance difference signal and the specified value voltage,
2. The diaphragm according to claim 1, comprising a comparison circuit for comparison, an aperture drive circuit for driving an aperture mechanism by the output of the comparison circuit, and an aperture element for narrowing the conductive path by a certain amount in response to the output of the drive circuit. Vortex flowmeter transducer. 3. The throttling means is a throttling chamber in which flexible membranes that deflect and displace in response to pressure are opposed to each other by a slight distance, and the pressure on the upstream side and the downstream side of the vortex generator of the flowmeter body is applied to each flexible membrane from the outside of the throttling chamber. 2. The vortex flowmeter transducer of claim 1, wherein the voltage is applied to the membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988127695U JPH0617051Y2 (en) | 1988-09-29 | 1988-09-29 | Vortex flowmeter detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988127695U JPH0617051Y2 (en) | 1988-09-29 | 1988-09-29 | Vortex flowmeter detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0248820U true JPH0248820U (en) | 1990-04-04 |
| JPH0617051Y2 JPH0617051Y2 (en) | 1994-05-02 |
Family
ID=31380352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988127695U Expired - Lifetime JPH0617051Y2 (en) | 1988-09-29 | 1988-09-29 | Vortex flowmeter detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0617051Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6068427U (en) * | 1983-10-15 | 1985-05-15 | トキコ株式会社 | vortex flow meter |
-
1988
- 1988-09-29 JP JP1988127695U patent/JPH0617051Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6068427U (en) * | 1983-10-15 | 1985-05-15 | トキコ株式会社 | vortex flow meter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0617051Y2 (en) | 1994-05-02 |
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