CN210400477U - Precession vortex flowmeter - Google Patents
Precession vortex flowmeter Download PDFInfo
- Publication number
- CN210400477U CN210400477U CN201921722973.0U CN201921722973U CN210400477U CN 210400477 U CN210400477 U CN 210400477U CN 201921722973 U CN201921722973 U CN 201921722973U CN 210400477 U CN210400477 U CN 210400477U
- Authority
- CN
- China
- Prior art keywords
- resistor
- operational amplifier
- microprocessor
- capacitor
- piezoelectric sensor
- 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.)
- Active
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a precession vortex flowmeter, including piezoelectric sensor, microprocessor and LCD display, the output signal of piezoelectric sensor loops through and amplifies noise reduction circuit, trapped wave processing circuit and buffer circuit to process and send into microprocessor, the peak noise interference that the noise reduction circuit that amplifies produced mechanical vibration is reduced, and eliminate the low frequency clutter, trapped wave processing circuit utilizes the trapper principle to effectively eliminate the power frequency interference and the electromagnetic influence that precession vortex flowmeter produced in the course of the work, the precision of piezoelectric sensor signal detection is guaranteed to the utmost extent, finally the buffer circuit sends the detected signal into microprocessor steadily, the utility model not only eliminates the mechanical vibration interference, but also can effectively reduce the external clutter influences such as power frequency interference, external electromagnetic interference, etc., make microprocessor can accurately obtain the detected signal value of piezoelectric sensor, the measurement accuracy of the precession vortex flowmeter is improved.
Description
Technical Field
The utility model relates to a flowmeter detects technical field, especially relates to a precession vortex flowmeter.
Background
The vortex precession flowmeter belongs to a speed type measuring instrument, and measures the volume flow of a fluid by measuring a frequency signal which is in direct proportion to the flow. The fluid entering the flowmeter generates a vortex flow through the vortex generator, the vortex flow is swirled in the Venturi tube, and the vortex flow is accelerated by suddenly throttling to the contraction section. The pressure generated by the vortex flow is converted into an electric signal by adopting a piezoelectric sensor by utilizing a piezoelectric effect principle, and the electric signal is filtered, amplified and sent into a microprocessor for operation and calculation. In the signal processing process of the piezoelectric sensor, the conventional precession vortex flowmeter can only reduce the mechanical vibration interference between pipelines, but can not effectively eliminate other external interference, such as power frequency interference generated by a vortex generator, external electromagnetic interference and the like, so that a microprocessor can not accurately acquire the detection signal value of the piezoelectric sensor, and the measurement reading of the precession vortex flowmeter has deviation.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, an object of the present invention is to provide a vortex precession flowmeter.
The technical scheme for solving the problem is as follows: a precession vortex flowmeter comprises a piezoelectric sensor, a microprocessor and an LCD display, wherein an output signal of the piezoelectric sensor is processed by an amplifying and noise reducing circuit, a trap wave processing circuit and an isolating circuit in sequence and then is sent to the microprocessor; the amplifying and noise reducing circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the piezoelectric sensor through a resistor R1 and is grounded through a capacitor C1, the inverting input end of the operational amplifier AR1 is connected with one ends of resistors R2 and R3, the other end of the resistor R3 is grounded, the other end of the resistor R2 is connected with one ends of a resistor R4 and a capacitor C2, the other end of the capacitor C2 is connected with one end of a resistor R5, and the other ends of the resistors R4 and R5 are connected with the input end of the notch processing circuit.
Preferably, the notch processing circuit includes an operational amplifier AR2, an inverting input terminal of the operational amplifier AR2 is connected to the output terminal of the amplification noise reduction circuit and one end of a resistor R6 and a capacitor C4, and is connected to the output terminal of the operational amplifier AR2 through a resistor R9, a non-inverting input terminal of the operational amplifier AR2 is grounded, the other end of the resistor R6 is connected to one end of a resistor R7 and is grounded through a capacitor C3, the other end of the capacitor C4 is connected to one end of a capacitor C5 and is grounded through a resistor R8, and the other ends of the resistor R7 and the capacitor C5 are connected to the output terminal of the operational amplifier AR2 and the input terminal of the isolation circuit through a capacitor C6.
Preferably, the isolation circuit includes an operational amplifier AR3, a non-inverting input terminal of the operational amplifier AR3 is connected to an output terminal of the operational amplifier AR2 and is grounded through a resistor R10, an inverting input terminal of the operational amplifier AR3 is connected to an output terminal of the operational amplifier AR3 and an input terminal of the a/D converter through a resistor R11, and an output terminal of the a/D converter is connected to the microprocessor.
Preferably, the microprocessor is a single chip microcomputer, and the single chip microcomputer is connected with the LCD display screen through a data bus.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses circuit design is ingenious, not only eliminates mechanical vibration interference, can effectively reduce external clutter influences such as power frequency interference, external electromagnetic interference moreover, makes microprocessor can accurately acquire piezoelectric sensor's detected signal value, improves precession vortex flowmeter's measurement accuracy;
2. the amplifying and noise-reducing circuit reduces peak noise interference generated by mechanical vibration and eliminates low-frequency clutter, the trap wave processing circuit effectively eliminates power frequency interference and electromagnetic influence generated by the precession vortex flowmeter in the working process by utilizing the principle of a trap wave device, and the accuracy of piezoelectric sensor signal detection is greatly guaranteed.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
A precession vortex flowmeter comprises a piezoelectric sensor, a microprocessor and an LCD display, wherein an output signal of the piezoelectric sensor is processed by an amplifying and noise reducing circuit, a trap wave processing circuit and an isolating circuit in sequence and then is sent to the microprocessor. When the flow meter is specifically set, the microprocessor selects the single chip microcomputer, the single chip microcomputer is connected with the LCD display screen through the data bus, and the LCD display screen is used for displaying flow information.
In order to ensure the accuracy of the signal detection of the piezoelectric sensor, firstly, a detection signal is sent into an amplifying and noise-reducing circuit for preliminary treatment. The amplifying and noise reducing circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the piezoelectric sensor through a resistor R1 and is grounded through a capacitor C1, the inverting input end of the operational amplifier AR1 is connected with one ends of resistors R2 and R3, the other end of the resistor R3 is grounded, the other end of the resistor R2 is connected with one ends of a resistor R4 and a capacitor C2, the other end of the capacitor C2 is connected with one end of a resistor R5, and the other ends of the resistors R4 and R5 are connected with the input end of the notch processing circuit.
After the output signal of the piezoelectric sensor is subjected to RC low-pass filtering treatment formed by the resistor R1 and the capacitor C1, spike noise interference generated by mechanical vibration is reduced primarily, and then the signal is sent to the operational amplifier AR1 to be amplified, so that the detection signal intensity is improved. The signal amplified by the operational amplifier AR1 is sent to a high-pass filter formed by a capacitor C2 and resistors R4 and R5 to eliminate low-frequency noise, and external noise interference is effectively reduced.
The trap processing circuit further processes the output signal of the amplification noise reduction circuit. The notch processing circuit comprises an operational amplifier AR2, wherein the inverting input end of the operational amplifier AR2 is connected with the output end of the amplification noise reduction circuit, the resistor R6 and one end of the capacitor C4, and is connected with the output end of the operational amplifier AR2 through a resistor R9, the non-inverting input end of the operational amplifier AR2 is grounded, the other end of the resistor R6 is connected with one end of the resistor R7 and is grounded through a capacitor C3, the other end of the capacitor C4 is connected with one end of the capacitor C5 and is grounded through a resistor R8, and the other ends of the resistor R7 and the capacitor C5 are connected with the output end of the operational amplifier AR2 and the input end of the isolation circuit through. In the processing process of the operational amplifier AR2, the resistor R6-R8 and the capacitor C3-C5 form an RC trap network, so that power frequency interference and electromagnetic influence generated in the working process of the precession vortex flowmeter are effectively eliminated, and the accuracy of signal detection of the piezoelectric sensor is greatly guaranteed.
The isolation circuit comprises an operational amplifier AR3, the non-inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR2 and is grounded through a resistor R10, the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the input end of the A/D converter through a resistor R11, and the output end of the A/D converter is connected with the microprocessor. The operational amplifier AR3 isolates and outputs the processed detection signal to the microprocessor by using the isolator principle, so as to avoid the interference of the amplifying and noise reducing circuit and the trap processing circuit to the microprocessor during the processing process, and ensure the stability of signal reception.
The utility model discloses when specifically using, the signal of telecommunication of piezoelectric sensor output is at first sent into and is enlarged among the noise reduction circuit and carry out preliminary treatment, reduces the peak noise interference that mechanical oscillation produced to eliminate the low frequency clutter, notch wave treatment circuit utilizes the trapper principle effectively to eliminate power frequency interference and the electromagnetic influence that precession vortex flowmeter produced in the course of the work, has guaranteed piezoelectric sensor signal detection's precision greatly to limit, sends into microprocessor through isolating circuit with detected signal steadily at last. The microprocessor counts the frequency by using the existing multi-period counting mode and displays the flow information on the LCD according to the counting result.
To sum up, the utility model discloses circuit design is ingenious, not only eliminates mechanical vibration interference, can effectively reduce external clutter influences such as power frequency interference, external electromagnetic interference moreover, makes microprocessor can accurately acquire piezoelectric sensor's detected signal value, improves precession vortex flowmeter's measurement accuracy.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. A precession vortex flowmeter comprising a piezoelectric sensor, a microprocessor and an LCD display, characterized in that: the output signal of the piezoelectric sensor is processed by the amplifying and noise reducing circuit, the trap wave processing circuit and the isolating circuit in sequence and then is sent to the microprocessor; the amplifying and noise reducing circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the piezoelectric sensor through a resistor R1 and is grounded through a capacitor C1, the inverting input end of the operational amplifier AR1 is connected with one ends of resistors R2 and R3, the other end of the resistor R3 is grounded, the other end of the resistor R2 is connected with one ends of a resistor R4 and a capacitor C2, the other end of the capacitor C2 is connected with one end of a resistor R5, and the other ends of the resistors R4 and R5 are connected with the input end of the notch processing circuit.
2. The precession vortex flowmeter of claim 1 wherein: the notch processing circuit comprises an operational amplifier AR2, the inverting input end of the operational amplifier AR2 is connected with the output end of the amplification noise reduction circuit, one end of a resistor R6 and one end of a capacitor C4, and is connected with the output end of the operational amplifier AR2 through a resistor R9, the non-inverting input end of the operational amplifier AR2 is grounded, the other end of a resistor R6 is connected with one end of a resistor R7 and is grounded through a capacitor C3, the other end of a capacitor C4 is connected with one end of a capacitor C5 and is grounded through a resistor R8, and the other ends of the resistor R7 and a capacitor C5 are connected with the output end of the operational amplifier AR2 and the input end of the isolation circuit through a.
3. The precession vortex flowmeter of claim 2 wherein: the isolation circuit comprises an operational amplifier AR3, the non-inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR2 and is grounded through a resistor R10, the inverting input end of the operational amplifier AR3 is connected with the output end of the operational amplifier AR3 and the input end of the A/D converter through a resistor R11, and the output end of the A/D converter is connected with the microprocessor.
4. The precession vortex flowmeter of claim 1 wherein: the microprocessor selects a single chip microcomputer, and the single chip microcomputer is connected with the LCD display screen through a data bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722973.0U CN210400477U (en) | 2019-10-15 | 2019-10-15 | Precession vortex flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921722973.0U CN210400477U (en) | 2019-10-15 | 2019-10-15 | Precession vortex flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210400477U true CN210400477U (en) | 2020-04-24 |
Family
ID=70343300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921722973.0U Active CN210400477U (en) | 2019-10-15 | 2019-10-15 | Precession vortex flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210400477U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629599A (en) * | 2020-12-24 | 2021-04-09 | 中国航天空气动力技术研究院 | Circuit of precession vortex flowmeter and precession vortex flowmeter |
| CN113049108A (en) * | 2021-03-03 | 2021-06-29 | 河南新正方彩印有限公司 | Environment-friendly UV printing treatment control system |
-
2019
- 2019-10-15 CN CN201921722973.0U patent/CN210400477U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629599A (en) * | 2020-12-24 | 2021-04-09 | 中国航天空气动力技术研究院 | Circuit of precession vortex flowmeter and precession vortex flowmeter |
| CN113049108A (en) * | 2021-03-03 | 2021-06-29 | 河南新正方彩印有限公司 | Environment-friendly UV printing treatment control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210400477U (en) | Precession vortex flowmeter | |
| CN105203136B (en) | A kind of distributed sensing system based on differential amplification technology | |
| CN104198826A (en) | Pulse signal detection system, method and particle counter | |
| CN104270011B (en) | A kind of ac current source that inductance type transducer is encouraged | |
| CN201477423U (en) | Intelligent vibration monitoring and protecting apparatus | |
| WO2022237043A1 (en) | Converter measurement circuit of electromagnetic water meter | |
| CN207352066U (en) | A kind of signal supervisory instrument | |
| CN110837000A (en) | Frequency measurement system based on FPGA | |
| US12092627B2 (en) | Signal processing system and method for inductive oil abrasive particle sensor | |
| CN107765085A (en) | A kind of signal supervisory instrument and method | |
| CN204188710U (en) | A kind of pulse signal detection system and corpuscular counter | |
| CN106500779A (en) | The vortex signal detection means of the accidental resonance with feedforward controller | |
| CN204228369U (en) | A kind of calibrating installation of vibration table | |
| CN106817129A (en) | A kind of apparatus for detecting weak signal based on C8051F020 | |
| CN217930390U (en) | Plug-in electromagnetic flowmeter | |
| CN204731200U (en) | Digital supersonic flaw detector | |
| CN213209146U (en) | Gas turbine flowmeter | |
| JP3445521B2 (en) | Electromagnetic flow meter | |
| CN218584123U (en) | Card type ultrasonic flowmeter | |
| CN209765001U (en) | Automatic intelligent test system for software application | |
| Szary et al. | Signal conditioning perspectives on pyroshock measurement systems | |
| CN212110155U (en) | Signal processing device of electromagnetic flowmeter | |
| CN218097871U (en) | Vortex street flowmeter | |
| CN211696770U (en) | Dam safety monitoring device | |
| JP3969576B2 (en) | Electromagnetic flow meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |