JPS5445182A - Current velocity measuring apparatus - Google Patents
Current velocity measuring apparatusInfo
- Publication number
- JPS5445182A JPS5445182A JP11202677A JP11202677A JPS5445182A JP S5445182 A JPS5445182 A JP S5445182A JP 11202677 A JP11202677 A JP 11202677A JP 11202677 A JP11202677 A JP 11202677A JP S5445182 A JPS5445182 A JP S5445182A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- circuit
- frequencies
- pass filter
- locked
- 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
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
PURPOSE: To obtain always stable outputs by using a phase-locked loop circuit as a means of converting vortex generation number signals to electrical frequencies.
CONSTITUTION: A phase-locked loop circuit consisting of a phase detecyor 41, a low-pass filter 42 and a voltage control oscillator 43 is connected to a preamplifier 23. Then, the output waveforms contaning nozzle frequency components of the preamplifier 23 are waveform-shaped by a Schmitt circuit 48 by way of a low-pass filter circuit consisting of a resistance 44 and a capacitor 45 and a high-pass filter circuit consisting of a resistance 47 and a capacitor 46, whereby the approximate vortex frequencies are detected and these are then converted to voltages in a frequency-voltage conversion circuit 49 and are at the same time locked in the signal frequencies in the phase-locked circuit, thus even when vortex generation is disturbed from small velocity or rate of flow to large velocity or rate of flow, always stable electrical frequencies are outputted
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11202677A JPS5445182A (en) | 1977-09-16 | 1977-09-16 | Current velocity measuring apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11202677A JPS5445182A (en) | 1977-09-16 | 1977-09-16 | Current velocity measuring apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5445182A true JPS5445182A (en) | 1979-04-10 |
JPS6122767B2 JPS6122767B2 (en) | 1986-06-03 |
Family
ID=14576129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11202677A Granted JPS5445182A (en) | 1977-09-16 | 1977-09-16 | Current velocity measuring apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5445182A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4463612A (en) * | 1981-12-10 | 1984-08-07 | The Babcock & Wilcox Company | Electronic circuit using digital techniques for vortex shedding flowmeter signal processing |
-
1977
- 1977-09-16 JP JP11202677A patent/JPS5445182A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4463612A (en) * | 1981-12-10 | 1984-08-07 | The Babcock & Wilcox Company | Electronic circuit using digital techniques for vortex shedding flowmeter signal processing |
Also Published As
Publication number | Publication date |
---|---|
JPS6122767B2 (en) | 1986-06-03 |
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