CN206060703U - The special dynamic quick filter circuit of vortex-shedding meter - Google Patents
The special dynamic quick filter circuit of vortex-shedding meter Download PDFInfo
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- CN206060703U CN206060703U CN201620946629.XU CN201620946629U CN206060703U CN 206060703 U CN206060703 U CN 206060703U CN 201620946629 U CN201620946629 U CN 201620946629U CN 206060703 U CN206060703 U CN 206060703U
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- operational amplifier
- resistance
- electric capacity
- vortex
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Abstract
The special dynamic quick filter circuit of vortex-shedding meter, including d. c. voltage signal VI, subsequent cell V0, resistance R3, resistance R1, electric capacity R1, electric capacity R2, resistance R2, operational amplifier U1A, d. c. voltage signal VI Jing resistance R3, export to subsequent cell V0 after connection R1, ripple Jing electric capacity C2 in DC voltage VI are connected to 2 feet of operational amplifier U1A, the input pin 2 of operational amplifier U1A is connected feedback resistance R2 with output pin 1, the 3 feet ground connection of operational amplifier U1A, with R1 after the 1 connection electric capacity C1 of operational amplifier UIA, the junction point of R3 is connected, the 8 feet connection power supply VCC of operational amplifier U1A.The real-time response time reduces 100% than general filter, and ripple reduces 62%.
Description
Technical field
This utility model is related to vortex street flowmeter sensor field.
Background technology
Vortex street flowmeter sensor can be used for all gas and low-viscosity (mobile) liquid, range ratio can compare one, line more than hundreds of
Degree is good, repeatability error is extremely low, instrument coefficient is unrelated with fluid etc. that feature possesses significant advantage for property.Plus vortex-shedding meter specification
It is numerous, the frequency range of vortex signal between 0.1Hz～10kHz, particularly when the heavy caliber flowing meter of liquid is measured, whirlpool
The reference frequency output in street only between 0.1Hz～40Hz, directly adopt when f-i conversions are carried out by traditional vortex-shedding meter
With common active filter, as frequency is low, the ripple of output current is very big, increase vortex-shedding meter measurement it is not true
It is fixed to spend, make vortex-shedding meter cannot accurate measurement, if increasing filtering parameter, the response time of output is just increased, it is impossible to correct
Reflection real traffic real-time change.
The content of the invention
This utility model is directed to the deficiencies in the prior art, there is provided a kind of real-time response time is reduced than general filter
100%, ripple reduces 62%, and performance complies fully with the requirement of national standard, solves electric current output ripple and response time
Contradiction, improve the special dynamic quick filter circuit of vortex-shedding meter of the certainty of measurement of vortex-shedding meter.
To realize this utility model purpose, there is provided technical scheme below：The special dynamic quick filter electricity of vortex-shedding meter
Road, it is characterised in that including d. c. voltage signal VI, subsequent cell V0, resistance R3, resistance R1, electric capacity R1, electric capacity R2, resistance
R2, operational amplifier U1A, d. c. voltage signal VI Jing resistance R3 are exported to subsequent cell V0, in DC voltage VI after connection R1
Ripple Jing electric capacity C2 be connected to 2 feet of operational amplifier U1A, the input pin 2 of operational amplifier U1A is connected instead with output pin 1
The 3 feet ground connection of feed resistance R2, operational amplifier U1A, the junction point after the 1 connection electric capacity C1 of operational amplifier UIA with R1, R3
It is connected, the 8 feet connection power supply VCC of operational amplifier U1A.
This utility model beneficial effect：This utility model filter response speed is fast, reduces 100% than general filter；
The effect for offsetting ripple is good, and ripple reduces 62%；Simple structure, it is low in energy consumption.
Description of the drawings
Fig. 1 is circuit diagram of the present utility model.
Specific embodiment
The special dynamic quick filter circuit of vortex-shedding meter, including d. c. voltage signal VI, subsequent cell V0, resistance R3,
Resistance R1, electric capacity R1, electric capacity R2, resistance R2, operational amplifier U1A, d. c. voltage signal VI Jing resistance R3 are exported after connection R1
To subsequent cell V0, the ripple Jing electric capacity C2 in DC voltage VI are connected to 2 feet of operational amplifier U1A, operational amplifier U1A
Input pin 2 be connected feedback resistance R2 with output pin 1, the 3 feet ground connection of operational amplifier U1A, 1 connection of operational amplifier UIA
It is connected with the junction point of R1, R3 after electric capacity C1, the 8 feet connection power supply VCC of operational amplifier U1A.Ripple Jing operational amplifiers are anti-
Mutually amplify after, Jing electric capacity C1 is added with original signal, due to amplified ripple phase place with original ripple conversely, being added
After counteract ripple in original direct current signal, because of electric capacity and resistance using low capacity, response time reduces 100%, ripple
62% is reduced, the contradiction of electric current output ripple and response time is solved, the certainty of measurement of vortex-shedding meter is improve.
Claims (1)
1. the special dynamic quick filter circuit of vortex-shedding meter, it is characterised in that including d. c. voltage signal VI, subsequent cell V0,
Resistance R3, resistance R1, electric capacity R1, electric capacity R2, resistance R2, operational amplifier U1A, d. c. voltage signal VI Jing resistance R3, connection
Export after R1 to subsequent cell V0, the ripple Jing electric capacity C2 in DC voltage VI are connected to 2 feet of operational amplifier U1A, computing
The input pin 2 of amplifier U1A is connected feedback resistance R2, the 3 feet ground connection of operational amplifier U1A, operational amplifier with output pin 1
It is connected with the junction point of R1, R3 after the 1 connection electric capacity C1 of UIA, the 8 feet connection power supply VCC of operational amplifier U1A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620946629.XU CN206060703U (en) | 2016-08-26 | 2016-08-26 | The special dynamic quick filter circuit of vortex-shedding meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620946629.XU CN206060703U (en) | 2016-08-26 | 2016-08-26 | The special dynamic quick filter circuit of vortex-shedding meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206060703U true CN206060703U (en) | 2017-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620946629.XU Active CN206060703U (en) | 2016-08-26 | 2016-08-26 | The special dynamic quick filter circuit of vortex-shedding meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN206060703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230402A (en) * | 2016-08-26 | 2016-12-14 | 江苏伟屹电子有限公司 | The special dynamic quick filter circuit of vortex-shedding meter |
-
2016
- 2016-08-26 CN CN201620946629.XU patent/CN206060703U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230402A (en) * | 2016-08-26 | 2016-12-14 | 江苏伟屹电子有限公司 | The special dynamic quick filter circuit of vortex-shedding meter |
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