JPS5847128U - Self-checking electromagnetic flowmeter - Google Patents
Self-checking electromagnetic flowmeterInfo
- Publication number
- JPS5847128U JPS5847128U JP14129081U JP14129081U JPS5847128U JP S5847128 U JPS5847128 U JP S5847128U JP 14129081 U JP14129081 U JP 14129081U JP 14129081 U JP14129081 U JP 14129081U JP S5847128 U JPS5847128 U JP S5847128U
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic flowmeter
- self
- magnetic field
- excitation magnetic
- excitation
- 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
Landscapes
- Measuring Volume Flow (AREA)
- Arrangements For Transmission Of Measured Signals (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
図は本考案の実施例を示し、第１図はディジタル回路を
主体とする場合のブロック図、第２図は第１図における
各部の波形を示すタイミングチャート、第３図はアナロ
グ回路を主体とする場合のブロック図、第４図は第３図
における各部の波形を示すタイミングチャート、第５図
は励磁電流の各周期中において電流値を変化させる場合
の要部ブロック図、第６図は第５図における各部の波形
を示すタイミングチャートである。
ｐｓ・・・・・・電源部、ＯＡ１〜ＯＡ５・・・・・・
演算増幅器、Ａ／Ｄ・・・・・・ＡＤＣ（アナログ・デ
ィジタル変換器）、Ｉｌｏ・・・・・・入出力回路、Ｃ
ＰＵ・・・・・・プロセッサ、ＭＭ・・・・・・メモリ
、Ａ１．Ａ２・・・・・・増幅器、Ｒ１−Ｒ８・・・・
・・抵抗器、ＺＤ・・・・・・定電圧ダイオード、Ｑ・
・・・・・トランジスタ、Ｃ１〜Ｃ８・・・・・・コン
デンサ、ＳＷ１〜５Ｗ１２・・・・・・スイッチ、”１
１ ”２・・・・・・励磁コイル、ＥＰ４．ＥＰ２・・
・・・・電極、Ｐ・・・・・・管路。The figures show an embodiment of the present invention. Fig. 1 is a block diagram when the main part is a digital circuit, Fig. 2 is a timing chart showing waveforms of each part in Fig. 1, and Fig. 3 is a block diagram when the main part is an analog circuit. Figure 4 is a timing chart showing the waveforms of each part in Figure 3, Figure 5 is a block diagram of the main parts when changing the current value during each cycle of the excitation current, Figure 6 is a block diagram of the main parts when changing the current value during each cycle of the excitation current. 5 is a timing chart showing waveforms of various parts in FIG. 5. FIG. ps...Power supply section, OA1 to OA5...
Operational amplifier, A/D...ADC (Analog-to-digital converter), Ilo...Input/output circuit, C
PU...processor, MM...memory, A1. A2...Amplifier, R1-R8...
...Resistor, ZD... Constant voltage diode, Q.
...Transistor, C1-C8...Capacitor, SW1-5W12...Switch, "1"
1 ”2...Excitation coil, EP4.EP2...
...Electrode, P...Pipeline.
Claims (1)
磁磁界を定常値から該定常値に対し一定比率の値へ変化
させる回路と、前記励磁磁界の変化前と変化後との検出
出力を記憶するメモリと１、該メモリの記憶内容に応じ
て前記励磁磁界の変化前と変化後との検出出力比を求め
る演算装置とを備えたことを特徴とする自己チェック式
電磁流量計。 −In an electromagnetic flowmeter that performs excitation with a rectangular wave current, a circuit that changes an excitation magnetic field from a steady value to a value that is a constant ratio to the steady value, and a memory that stores detection outputs before and after the excitation magnetic field changes. 1. A self-checking electromagnetic flowmeter comprising: (1) an arithmetic unit that calculates a detection output ratio between before and after the excitation magnetic field changes according to the contents stored in the memory. −
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14129081U JPS5847128U (en) | 1981-09-21 | 1981-09-21 | Self-checking electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14129081U JPS5847128U (en) | 1981-09-21 | 1981-09-21 | Self-checking electromagnetic flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5847128U true JPS5847128U (en) | 1983-03-30 |
| JPS6222813Y2 JPS6222813Y2 (en) | 1987-06-10 |
Family
ID=29934397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14129081U Granted JPS5847128U (en) | 1981-09-21 | 1981-09-21 | Self-checking electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5847128U (en) |
-
1981
- 1981-09-21 JP JP14129081U patent/JPS5847128U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6222813Y2 (en) | 1987-06-10 |
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