CN202043076U - Preposition amplifying circuit for turbine meter - Google Patents
Preposition amplifying circuit for turbine meter Download PDFInfo
- Publication number
- CN202043076U CN202043076U CN2011200527914U CN201120052791U CN202043076U CN 202043076 U CN202043076 U CN 202043076U CN 2011200527914 U CN2011200527914 U CN 2011200527914U CN 201120052791 U CN201120052791 U CN 201120052791U CN 202043076 U CN202043076 U CN 202043076U
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- resistance
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- diode
- resistor
- amplifier
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Abstract
Disclosed is a preposition amplifying circuit for turbine meter, formed by connected electronic components. To be specific: the anode of the diode D1 is grounded and connected to one end of the sensor P1 and the cathode of the diode D2 as well; the cathode of the diode D1 is connected with the other end of the sensor P1, the anode of the diode D2, and one end of the capacitor C2; the other end of the capacitor C2 is connected with one end of the capacitor R6; the other end of the capacitor R6 is connected with the negative input end of the operation amplifier U3A and is connected with one end of the resistor R7 as well; the resistor R1, connected to a 5V power supply, is connected to one end of the resistor R2 and is also connected to one end of the capacitor C1 and the positive input end of the operation amplifier U3A; the other end of resistor R2 is connected with the other end of the capacitor C1 and is grounded; the other end of the resistor R7 is connected with the output end of the operation amplifier U3A and is connected with the positive input end of the operation amplifier U3B as well; the negative input end of the operation amplifier U3B is connected with one end of resistor R9 and one end of the resistor R8, with the other ends of the resistor R8 and the resistor R9 being respectively connected with a 5V power supply and grounded; and the output end of the operation amplifier U3B is connected with the measure pin of a one-chip microcomputer. The preposition amplifying circuit for turbine meter features simple circuit, great anti-interference performance, and high measuring precision, and is capable of adapting to the changes of signal intensity.
Description
Technical field
The utility model relates to amplifying circuit, is specifically related to a kind of pre-amplification circuit of turbine flowmeter.
Background technology
The number that turbine flowmeter needs transducer that turbo blade is turned over is transformed into the defeated people of corresponding number of pulse signals and handles to single-chip microcomputer and calculate flow.Influences such as the power of the pulse signal of transducer output, interference are unfavorable for the measurement of flowmeter, and tackling it before signal is sent into single-chip microcomputer amplifies, and then defeated people calculates to single-chip microcomputer.
Summary of the invention
The purpose of this utility model is: a kind of pre-amplification circuit of turbine flowmeter is provided, and the variation that this pre-amplification circuit can adaptation signal intensity suppresses interference signal, has improved the turbine flowmeter certainty of measurement.
Technical solution of the present utility model is: this pre-amplification circuit is connected to form by following electronic devices and components: diode D1 plus earth connects transducer P1 one end and diode D2 negative electrode simultaneously; Diode D1 negative electrode connects an end of the transducer P1 other end and diode D2 anode and capacitor C 2; The end of the other end connecting resistance R6 of capacitor C 2; Another termination amplifier U3A negative input end of resistance R 6 is the end of connecting resistance R7 simultaneously; One termination 5V power supply of resistance R 1; Resistance R 1 another termination R2 one end connects capacitor C 1 one ends and amplifier U3A positive input terminal simultaneously; Resistance R 2 another termination capacitor C 1 other end ground connection; Resistance R 7 another termination amplifier U3A outputs connect amplifier U3B positive input terminal simultaneously; Amplifier U3B negative input end connecting resistance R9 one end, connecting resistance R8 one end simultaneously; Resistance R 8 another termination 5V power supplys; Resistance R 9 other end ground connection; Amplifier U3B output order sheet unit frequency is measured pin.
The utility model has the advantages that: this Pre-amplifier Circuit Design is simple, can the adaptation signal Strength Changes, amplify weak sensor signal, and simultaneously stronger signal is also had good adaptability, good in anti-interference performance, certainty of measurement height.
Description of drawings
Fig. 1 is the circuit diagram of pre-amplification circuit of the present utility model.
Embodiment
As shown in Figure 1, this pre-amplification circuit is connected to form by following electronic devices and components: diode D1 plus earth connects transducer P1 one end and diode D2 negative electrode simultaneously; Diode D1 negative electrode connects an end of the transducer P1 other end and diode D2 anode and capacitor C 2; The end of the other end connecting resistance R6 of capacitor C 2; Another termination amplifier U3A negative input end of resistance R 6 is the end of connecting resistance R7 simultaneously; One termination 5V power supply of resistance R 1; Resistance R 1 another termination R2 one end connects capacitor C 1 one ends and amplifier U3A positive input terminal simultaneously; Resistance R 2 another termination capacitor C 1 other end ground connection; Resistance R 7 another termination amplifier U3A outputs connect amplifier U3B positive input terminal simultaneously; Amplifier U3B negative input end connecting resistance R9 one end, connecting resistance R8 one end simultaneously; Resistance R 8 another termination 5V power supplys; Resistance R 9 other end ground connection; Amplifier U3B output order sheet unit frequency is measured pin.
Claims (1)
1. the pre-amplification circuit of turbine flowmeter, it is characterized in that: this pre-amplification circuit is connected to form by following electronic devices and components: diode D1 plus earth connects transducer P1 one end and diode D2 negative electrode simultaneously; Diode D1 negative electrode connects an end of the transducer P1 other end and diode D2 anode and capacitor C 2; The end of the other end connecting resistance R6 of capacitor C 2; Another termination amplifier U3A negative input end of resistance R 6 is the end of connecting resistance R7 simultaneously; One termination 5V power supply of resistance R 1; Resistance R 1 another termination R2 one end connects capacitor C 1 one ends and amplifier U3A positive input terminal simultaneously; Resistance R 2 another termination capacitor C 1 other end ground connection; Resistance R 7 another termination amplifier U3A outputs connect amplifier U3B positive input terminal simultaneously; Amplifier U3B negative input end connecting resistance R9 one end, connecting resistance R8 one end simultaneously; Resistance R 8 another termination 5V power supplys; Resistance R 9 other end ground connection; Amplifier U3B output order sheet unit frequency is measured pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200527914U CN202043076U (en) | 2011-03-02 | 2011-03-02 | Preposition amplifying circuit for turbine meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200527914U CN202043076U (en) | 2011-03-02 | 2011-03-02 | Preposition amplifying circuit for turbine meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202043076U true CN202043076U (en) | 2011-11-16 |
Family
ID=44970501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200527914U Expired - Fee Related CN202043076U (en) | 2011-03-02 | 2011-03-02 | Preposition amplifying circuit for turbine meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202043076U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595375A (en) * | 2013-11-15 | 2014-02-19 | 中国人民解放军第二炮兵装备研究院第三研究所 | Current pulse type intrinsic safety anti-explosion pre-amplifier |
-
2011
- 2011-03-02 CN CN2011200527914U patent/CN202043076U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595375A (en) * | 2013-11-15 | 2014-02-19 | 中国人民解放军第二炮兵装备研究院第三研究所 | Current pulse type intrinsic safety anti-explosion pre-amplifier |
| CN103595375B (en) * | 2013-11-15 | 2016-01-27 | 中国人民解放军第二炮兵装备研究院第三研究所 | Current pulse type intrinsic safety anti-explosion pre-amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20120302 |