JPS646824A - Karman vortex flowmeter - Google Patents
Karman vortex flowmeterInfo
- Publication number
- JPS646824A JPS646824A JP16338687A JP16338687A JPS646824A JP S646824 A JPS646824 A JP S646824A JP 16338687 A JP16338687 A JP 16338687A JP 16338687 A JP16338687 A JP 16338687A JP S646824 A JPS646824 A JP S646824A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- output
- frequency
- vortex
- 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
Abstract
PURPOSE:To improve vibration resistance and to eliminate a zero shift by adding a function which judges whether an output frequency is a vortex signal from the amplitude of the frequency. CONSTITUTION:A vortex signal from a stress detection sensor 1 passes through a filter circuit 12, etc., and is inputted to a Schmitt trigger circuit 14. Part of the output signal of the Schmitt trigger circuit 14 is converted by the F/ constant-pulse-width converting circuit 211 of an F/V converter 21 into a pulse train, which is integrated by a 1st integration circuit 212 and converted into an analog voltage proportion to a vortex frequency. This analog voltage is converted by a function generating circuit 22 into a signal of the necessary relation of the vortex signal frequency. Only when the output of a 2nd integration circuit 33 is larger than the output of the function generator 22, the output of the comparator 34 turns on a 1st switch circuit 15 and the output pulse signal of the Schmitt trigger circuit 14 is outputted as a vortex frequency signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16338687A JPH07111363B2 (en) | 1987-06-30 | 1987-06-30 | Karman vortex flowmeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16338687A JPH07111363B2 (en) | 1987-06-30 | 1987-06-30 | Karman vortex flowmeter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS646824A true JPS646824A (en) | 1989-01-11 |
JPH07111363B2 JPH07111363B2 (en) | 1995-11-29 |
Family
ID=15772903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16338687A Expired - Lifetime JPH07111363B2 (en) | 1987-06-30 | 1987-06-30 | Karman vortex flowmeter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07111363B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102466500A (en) * | 2010-11-19 | 2012-05-23 | 中国电子科技集团公司第五十研究所 | Device and method for detecting quantity of output pulses of pulse type vortex shedding flowmeter, and device and method for determining abnormity of output pulses |
-
1987
- 1987-06-30 JP JP16338687A patent/JPH07111363B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102466500A (en) * | 2010-11-19 | 2012-05-23 | 中国电子科技集团公司第五十研究所 | Device and method for detecting quantity of output pulses of pulse type vortex shedding flowmeter, and device and method for determining abnormity of output pulses |
Also Published As
Publication number | Publication date |
---|---|
JPH07111363B2 (en) | 1995-11-29 |
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