JPS5956524U - Excitation circuit of electromagnetic flowmeter - Google Patents
Excitation circuit of electromagnetic flowmeterInfo
- Publication number
- JPS5956524U JPS5956524U JP15134582U JP15134582U JPS5956524U JP S5956524 U JPS5956524 U JP S5956524U JP 15134582 U JP15134582 U JP 15134582U JP 15134582 U JP15134582 U JP 15134582U JP S5956524 U JPS5956524 U JP S5956524U
- Authority
- JP
- Japan
- Prior art keywords
- excitation
- electromagnetic flowmeter
- switch
- excitation current
- excitation circuit
- 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.)
- Pending
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の励磁回路の一例を示す接続図、第２図は
その動作説明のための波形図、第３図は本考案励磁回路
の一実施例を示す接続図、第４図は本考案励磁回路の他
の実施例を示す接続図である。
１・・・電磁流量計発信器、Ｌ・・・励磁コイル、２・
・・電流切換回路、Ｓ工〜Ｓ４・・・スイッチ、３・・
・電流検出抵抗、４・・・誤差増幅器、５・・・発振器
、６・・・比較器、Ｇ□、Ｇ２・・・アンドゲート、Ｐ
工＋ Ｐ２・・・駆動パルス、Ｑ・・・トランジスタ。Fig. 1 is a connection diagram showing an example of a conventional excitation circuit, Fig. 2 is a waveform diagram for explaining its operation, Fig. 3 is a connection diagram showing an embodiment of the excitation circuit of the present invention, and Fig. 4 is a connection diagram of the present invention. FIG. 3 is a connection diagram showing another embodiment of the invented excitation circuit. 1... Electromagnetic flow meter transmitter, L... Excitation coil, 2...
...Current switching circuit, S-S4...Switch, 3...
・Current detection resistor, 4... Error amplifier, 5... Oscillator, 6... Comparator, G□, G2... AND gate, P
Engineering + P2... Drive pulse, Q... Transistor.
Claims (1)
スによって駆動されるスイッチで切換えるとともに、励
磁電流が一定になるように前記スイッチまたは他のスイ
ッチをオンオフ制御するようにした電磁流量計の励磁回
路において、励磁電流に関連した電圧と設定電圧との差
を積分機能を有する誤差増幅器で増幅した後三角波と比
較し、その比較結果でスイッチをオンオフ制御して励磁
電流の定常値を一定に保つようにしたことを特徴とする
電磁流量計の励磁回路。An excitation circuit for an electromagnetic flowmeter in which the direction of an excitation current flowing through an excitation coil is switched by a switch driven by a low-frequency drive pulse, and the switch or another switch is controlled on/off so that the excitation current is constant. , the difference between the voltage related to the excitation current and the set voltage is amplified by an error amplifier with an integration function, and then compared with a triangular wave, and the comparison result is used to control the switch on and off to keep the steady value of the excitation current constant. An excitation circuit for an electromagnetic flowmeter characterized by the following features.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15134582U JPS5956524U (en) | 1982-10-05 | 1982-10-05 | Excitation circuit of electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15134582U JPS5956524U (en) | 1982-10-05 | 1982-10-05 | Excitation circuit of electromagnetic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5956524U true JPS5956524U (en) | 1984-04-13 |
Family
ID=30335404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15134582U Pending JPS5956524U (en) | 1982-10-05 | 1982-10-05 | Excitation circuit of electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5956524U (en) |
-
1982
- 1982-10-05 JP JP15134582U patent/JPS5956524U/en active Pending
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