JPH02101232U - - Google Patents
Info
- Publication number
- JPH02101232U JPH02101232U JP951789U JP951789U JPH02101232U JP H02101232 U JPH02101232 U JP H02101232U JP 951789 U JP951789 U JP 951789U JP 951789 U JP951789 U JP 951789U JP H02101232 U JPH02101232 U JP H02101232U
- Authority
- JP
- Japan
- Prior art keywords
- excitation
- excitation current
- changeover switch
- signal
- polarity
- 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
- 230000005284 excitation Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Measuring Volume Flow (AREA)
Description
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説明
する波形図、第３図は本考案の他の実施例の構成
を示すブロツク図、第４図は従来の電磁流量計の
構成を示すブロツク図、第５図は第４図に示す電
磁流量計の動作を説明する波形図である。
１１，１２……電極、１３，１４……励磁コイ
ル、１５，１６……励磁電源、１７……検出抵抗
、１８，２１，２２……励磁制御回路、１９……
信号処理回路。
FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, FIG. 2 is a waveform diagram explaining the operation of the embodiment shown in FIG. 1, and FIG. 3 is a diagram showing the configuration of another embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of a conventional electromagnetic flowmeter, and FIG. 5 is a waveform diagram illustrating the operation of the electromagnetic flowmeter shown in FIG. 11, 12... Electrode, 13, 14... Excitation coil, 15, 16... Excitation power supply, 17... Detection resistor, 18, 21, 22... Excitation control circuit, 19...
signal processing circuit.
Claims (1)
加され測定流量に対応して発生する信号電圧を検
出する信号検出手段と、前記励磁コイルに流れる
励磁電流の極性を切り換える切換スイツチを介し
て前記励磁電流を供給する励磁手段と、前記励磁
電流に関連する励磁信号が入力されこの励磁信号
に基いて前記切換スイツチの開閉を制御して前記
励磁電流を所定の値に制御すると共に前記励磁電
流の極性変更の開始時点から前記励磁電流がゼロ
になるまでの期間を検出して前記切換スイツチを
オフに制御する制御手段と、この切換スイツチが
前記のオフのあいだ前記励磁コイルにこの励磁コ
イルの抵抗値に比べて十分大きな抵抗値を持つ抵
抗が接続されるようにしたことを特徴とする電磁
流量計。 An excitation coil that generates a magnetic field, a signal detection means that detects a signal voltage generated in response to the measured flow rate when this magnetic field is applied, and a changeover switch that switches the polarity of the excitation current flowing through the excitation coil. an excitation means for supplying an excitation current, and an excitation signal related to the excitation current is inputted, and based on the excitation signal, controls opening and closing of the changeover switch to control the excitation current to a predetermined value and change the polarity of the excitation current. control means for detecting a period from the start of the excitation current until the excitation current becomes zero and controlling the changeover switch to turn off; An electromagnetic flowmeter characterized in that a resistor having a sufficiently large resistance value is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP951789U JPH0726660Y2 (en) | 1989-01-30 | 1989-01-30 | Electromagnetic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP951789U JPH0726660Y2 (en) | 1989-01-30 | 1989-01-30 | Electromagnetic flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02101232U true JPH02101232U (en) | 1990-08-13 |
| JPH0726660Y2 JPH0726660Y2 (en) | 1995-06-14 |
Family
ID=31216325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP951789U Expired - Lifetime JPH0726660Y2 (en) | 1989-01-30 | 1989-01-30 | Electromagnetic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726660Y2 (en) |
-
1989
- 1989-01-30 JP JP951789U patent/JPH0726660Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0726660Y2 (en) | 1995-06-14 |
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