JPS63200122U - - Google Patents
Info
- Publication number
- JPS63200122U JPS63200122U JP8805387U JP8805387U JPS63200122U JP S63200122 U JPS63200122 U JP S63200122U JP 8805387 U JP8805387 U JP 8805387U JP 8805387 U JP8805387 U JP 8805387U JP S63200122 U JPS63200122 U JP S63200122U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- power supply
- frequency
- cycle
- counter
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 2
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Description
第１図は本考案による電磁流量計の一実施例を
示す要部構成のブロツク図、第２図は従来の一般
的な電磁流量計の構成を示すブロツク図、第３図
は第２図における流量信号とサンプルホールド回
路によるサンプリングのタイミング関係を示す説
明図、第４図は第２図のＡ／Ｄ変換回路の構成を
示すブロツク図、第５図はＡＣ電源と電源同期信
号のタイミング関係を示す説明図である。
９……アナログ・デジタル（Ａ／Ｄ）変換回路
、１０……マイクロプロセツサ、１２……電圧・
周波数（Ｖ／Ｆ）変換器、１３……カウンタ、１
４……基準クロツク発生回路、１５……カウンタ
。
Fig. 1 is a block diagram of the main structure of an embodiment of an electromagnetic flowmeter according to the present invention, Fig. 2 is a block diagram showing the structure of a conventional general electromagnetic flowmeter, and Fig. 3 is a block diagram showing the structure of a conventional general electromagnetic flowmeter. An explanatory diagram showing the timing relationship between the flow rate signal and sampling by the sample and hold circuit, Figure 4 is a block diagram showing the configuration of the A/D conversion circuit in Figure 2, and Figure 5 shows the timing relationship between the AC power supply and the power synchronization signal. FIG. 9...Analog-to-digital (A/D) conversion circuit, 10...Microprocessor, 12...Voltage/
Frequency (V/F) converter, 13... Counter, 1
4...Reference clock generation circuit, 15...Counter.
Claims (1)
流量信号として検出し、この流量信号をアナログ
・デジタル変換したうえ、その出力に基づき流体
の流量を測定する電磁流量計において、交流電源
に同期した電源同期信号の周期で前記流量信号を
電圧・周波数変換しその出力パルスをカウントす
る電圧・周波数変換器および第１のカウンタから
なるアナログ・デジタル変換回路と、前記電源同
期信号と同じ周期で基準クロツクをカウントして
その電源周波数を計測する第２のカウンタと、前
記第１および第２のカウンタのカウント値に基づ
いて前記交流電源周期の変動を補正演算して一定
の出力を取り出す演算手段とを具備することを特
徴とする電磁流量計。 An electromagnetic flowmeter that detects the electromotive force generated when an alternating magnetic field is applied to a fluid as a flow rate signal, converts this flow rate signal from analog to digital, and then measures the flow rate of the fluid based on the output. an analog-to-digital conversion circuit consisting of a voltage/frequency converter and a first counter that converts the flow rate signal into voltage and frequency at the cycle of the power supply synchronization signal and counts the output pulses; and a reference clock at the same cycle as the power supply synchronization signal. a second counter that counts the power supply frequency and measures the power supply frequency; and a calculation means that corrects fluctuations in the AC power cycle based on the count values of the first and second counters and extracts a constant output. An electromagnetic flowmeter characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088053U JPH0738822Y2 (en) | 1987-06-09 | 1987-06-09 | Electromagnetic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088053U JPH0738822Y2 (en) | 1987-06-09 | 1987-06-09 | Electromagnetic flow meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63200122U true JPS63200122U (en) | 1988-12-23 |
| JPH0738822Y2 JPH0738822Y2 (en) | 1995-09-06 |
Family
ID=30945823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987088053U Expired - Lifetime JPH0738822Y2 (en) | 1987-06-09 | 1987-06-09 | Electromagnetic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0738822Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6029614A (en) * | 1983-07-27 | 1985-02-15 | Yokogawa Hokushin Electric Corp | Electromagnetic flowmeter |
-
1987
- 1987-06-09 JP JP1987088053U patent/JPH0738822Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6029614A (en) * | 1983-07-27 | 1985-02-15 | Yokogawa Hokushin Electric Corp | Electromagnetic flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0738822Y2 (en) | 1995-09-06 |
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