JPS59187723U - ultrasonic flow meter - Google Patents
ultrasonic flow meterInfo
- Publication number
- JPS59187723U JPS59187723U JP8331183U JP8331183U JPS59187723U JP S59187723 U JPS59187723 U JP S59187723U JP 8331183 U JP8331183 U JP 8331183U JP 8331183 U JP8331183 U JP 8331183U JP S59187723 U JPS59187723 U JP S59187723U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- time difference
- transducer
- signal
- 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図は従来技術を説明するための超音波流量計のブロ
ック図であり、第２図及び第３図は本願考案の実施例１
．２であり、第４図は第３図の応用例であり、第５図は
本願考案の実施例３である。
４・・・同期回路、９・・・時間差検出回路、１０゜１
０１・・・積分回路、１１・・・電圧制御発振器（ＶＣ
Ｏ）、１５・・・監視回路、１８・・・積分時間調整回
路。FIG. 1 is a block diagram of an ultrasonic flowmeter for explaining the prior art, and FIGS. 2 and 3 are embodiment 1 of the present invention.
．． 2, FIG. 4 is an application example of FIG. 3, and FIG. 5 is a third embodiment of the present invention. 4...Synchronization circuit, 9...Time difference detection circuit, 10°1
01...Integrator circuit, 11...Voltage controlled oscillator (VC
O), 15... Monitoring circuit, 18... Integral time adjustment circuit.
Claims (1)
超音波を繰り返し周期的に送受波する送受波器と、該送
受波器を駆動するための周波数信号を出力する電圧制御
発振器と、該電圧制御発振器の周波数信号を入力し同期
信号を出力する同期回路と、上記同期信号の分周信号と
上記送受波器からの受信信号とを入力して時間差を検出
する時間差検出回路と、該時間差検出回路の出力を積分
する積分回路と、該積分回路の積分出力に基づいて上記
電圧制御発振器が制御されこの制御結果である上記順方
向と逆方向との周波数信号の差より゛ 上記被測定流
体の流量を測定する超音波流量計においぞ、上記時間差
検出回路の出力を監視する監視回路と、該監視回路の出
力を受けて上記積分回路の積分時間を調整する積分時間
調整回路又は上記監視回路の出力を受けて上記被測定流
体の流量測定値を所定時間一定値に保持する保持手段の
少なくともいずれか一方を具備したことを特徴とする超
音波流量計。a transducer that repeatedly transmits and receives ultrasonic waves in the forward and reverse directions with respect to the flow of the fluid to be measured; a voltage-controlled oscillator that outputs a frequency signal for driving the transducer; a synchronization circuit that inputs a frequency signal of the voltage controlled oscillator and outputs a synchronization signal; a time difference detection circuit that inputs a frequency-divided signal of the synchronization signal and a received signal from the transducer to detect a time difference; An integrating circuit integrates the output of the time difference detection circuit, and the voltage controlled oscillator is controlled based on the integrated output of the integrating circuit. An ultrasonic flow meter that measures the flow rate of fluid includes a monitoring circuit that monitors the output of the time difference detection circuit, and an integral time adjustment circuit that adjusts the integration time of the integration circuit based on the output of the monitoring circuit, or the monitoring circuit. An ultrasonic flowmeter comprising at least one of holding means for receiving an output from a circuit and holding a measured flow rate value of the fluid to be measured at a constant value for a predetermined period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8331183U JPS59187723U (en) | 1983-06-01 | 1983-06-01 | ultrasonic flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8331183U JPS59187723U (en) | 1983-06-01 | 1983-06-01 | ultrasonic flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59187723U true JPS59187723U (en) | 1984-12-13 |
Family
ID=30213268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8331183U Pending JPS59187723U (en) | 1983-06-01 | 1983-06-01 | ultrasonic flow meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59187723U (en) |
-
1983
- 1983-06-01 JP JP8331183U patent/JPS59187723U/en active Pending
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