CN101672670A - Flow meter - Google Patents
Flow meter Download PDFInfo
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- CN101672670A CN101672670A CN200910024303A CN200910024303A CN101672670A CN 101672670 A CN101672670 A CN 101672670A CN 200910024303 A CN200910024303 A CN 200910024303A CN 200910024303 A CN200910024303 A CN 200910024303A CN 101672670 A CN101672670 A CN 101672670A
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Abstract
The invention discloses a flow meter which comprises a phase-locked loop excitation source circuit 1. The phase-locked loop driving source circuit 1 is connected with a power amplifier 2 which is connected with the end of a 90-degree phase-moving circuit 3; the 90-degree phase-moving circuit 3 is connected with the phase-locked loop driving source circuit 1; the power amplifier 2 is connected witha transmission sensor 4; the phase-locked loop driving source circuit 1 is connected with a receiving sensor 5; and the receiving sensor 5, a primary amplifier 6, a bandpass filter 7, a secondary amplifier 8, a detector 9, a lowpass filter 10 are connected in series with the signal end of a lowpass amplifier 11 and finally connected with a DSP microprocessor 12. The flow meter has accurate measurement without being nearly influenced by temperature, pressure, viscosity, intensity and other parameters of detected fluid.
Description
Technical field
The present invention relates to a kind of gauge of electronic technology field, particularly a kind of flow meter.
Background technology
All be unable to do without detection in commercial production and scientific experiment to product quality, and to the accurate measurement and the control of total operational throughput of material in the operational throughput (flow) of material in the unit interval or certain period, and requirement can be sent reflection flow size in time.Flow measurement no matter be to be purpose with the metering, still is used for process control, almost relates to all fields.In petroleum industry department, quantifying and loading and shipment, the storage of oil product and the aspects such as foreign trade of crude oil of the remote conveying of the proportioning mediation (mixing) of oil product, accurate measurement, crude oil and the rock gas of product oil and metering, oil product all need to carry out flow metering.
The flow measurement of two-phase fluid or heterogeneous fluid is a difficult problem of failing to obtain fine solution for a long time.Based on cross-correlation technique, adopt ultrasonic transducer to constitute the ultrasonic flow rate measuring system, can realize the non-cpntact measurement of two-phase flow or polyphasic flow, thereby the research of ultrasonic correlation flowmeters is of great importance.
Summary of the invention
In order to overcome the defective of above-mentioned prior art, the object of the present invention is to provide a kind of flow meter, can measure clean monophasic fluid, also can measure the foul fluid, slurries, " the difficult fluid " that extensively exists conventional flowmeters such as two-phase flow or heterogeneous fluid to be difficult to measure in viscous crude and the industry.
In order to achieve the above object, technical scheme of the present invention is achieved in that a kind of flow meter, it is characterized in that, comprise phaselocked loop driving source circuit 1, the output terminal of phaselocked loop driving source circuit 1 links to each other with the input end of power amplifier 2, the output terminal of power amplifier 2 links to each other with 90 ° of input ends of shifting to circuit 3,90 ° of output terminals of shifting to circuit 3 link to each other with the input end of shifting to of phaselocked loop driving source circuit 1, the signal output part of power amplifier 2 links to each other with the signal input part of emission sensor 4, the signal input part of phaselocked loop driving source circuit 1 links to each other with the signal output part of receiving sensor 5, another signal end of receiving sensor 5 links to each other with the input end of one-level amplifier 6, the output terminal of one-level amplifier 6 links to each other with the input end of bandpass filter 7, the output terminal of bandpass filter 7 links to each other with the input end of two-stage amplifier 8, the output terminal of two-stage amplifier 8 links to each other with the input end of wave detector 9, the output of wave detector 9 goes out end and links to each other with the input end of low-pass filter 10, the output terminal of low-pass filter 10 links to each other with the input end of low-pass amplifier 11, the output terminal of low-pass amplifier 11 links to each other with the signal input part of DSP microprocessor 12, each signal end of DSP microprocessor 12 respectively with serial communication port 13, data-carrier store 14, program storage 15, display 16 links to each other.
Described emission sensor 4 is a ultrasonic sensor.
Because emission sensor 4 of the present invention is ultrasonic sensor, so can do non-cpntact measurement, the accuracy height is subjected to the temperature of detected fluid, pressure, viscosity, the isoparametric influence of density hardly; Because receiving sensor 5 links to each other with phaselocked loop driving source circuit 1, and emission sensor 4 is shifted to signal circuit 3 and is also linked to each other with phaselocked loop driving source circuit 1 with 90 ° by power amplifier 2, so realized the effect of feeding back.
Description of drawings:
Accompanying drawing is a system hardware one-piece construction block diagram of the present invention;
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are described in detail.
With reference to accompanying drawing, a kind of flow meter, it is characterized in that, comprise phaselocked loop driving source circuit 1, the output terminal of phaselocked loop driving source circuit 1 links to each other with the input end of power amplifier 2, the output terminal of power amplifier 2 links to each other with 90 ° of input ends of shifting to circuit 3,90 ° of output terminals of shifting to circuit 3 link to each other with the input end of shifting to of phaselocked loop driving source circuit 1, the signal output part of power amplifier 2 links to each other with the signal input part of emission sensor 4, the signal input part of phaselocked loop driving source circuit 1 links to each other with the signal output part of receiving sensor 5, another signal end of receiving sensor 5 links to each other with the input end of one-level amplifier 6, the output terminal of one-level amplifier 6 links to each other with the input end of bandpass filter 7, the output terminal of bandpass filter 7 links to each other with the input end of two-stage amplifier 8, the output terminal of two-stage amplifier 8 links to each other with the input end of wave detector 9, the output of wave detector 9 goes out end and links to each other with the input end of low-pass filter 10, the output terminal of low-pass filter 10 links to each other with the input end of low-pass amplifier 11, the output terminal of low-pass amplifier 11 links to each other with the signal input part of DSP microprocessor 12, each signal end of DSP microprocessor 12 respectively with serial communication port 13, data-carrier store 14, program storage 15, display 16 links to each other.
Described emission sensor 4 is a ultrasonic sensor.
Principle of work of the present invention is: produce square-wave signal from phaselocked loop driving source circuit 1, through giving emission sensor 4 after the power amplifier 2, emission sensor 4 is sent the ultrasonic measurement fluid; In order to prevent standing wave effect, the square-wave signal that phaselocked loop driving source circuit 1 produces feeds back through 90 ° of phase shifts.Receiving sensor 5 detects ducted noise signal, after receiving signal, through one-level amplifier 6, bandpass filter 7, through some decay relatively of the signal after the bandpass filtering 7, therefore need to amplify through secondary, two-stage amplifier 8 is realized the function of amplification, again signal is flowed into wave detector 9, from the signal of wave detector 9 output except that the low frequency flowing noise signal, also have HF noise signal, system also will be interfered and exist other high frequency noises, low-pass filter 10 to eliminate high frequency interference, output signal strength after the demodulation is less, can not satisfy the requirement of sampling, need amplify, low-pass amplifier 11 is realized this function, to collect signal at last and give the DSP microprocessor and handle, output at last or storage.
The present invention can realize following significant function:
1, the major part adaptability of measuring system is strong, can measure clean monophasic fluid, also can measure dirty fluid, slurries, " difficulty " fluid (highly corrosive that extensively exists conventional flowmeters such as two-phase fluid or heterogeneous fluid to be difficult to measure in viscous crude and the industry, high viscosity fluid), the different measuring object is only needed to select suitable emission sensor 4 according to the physics and the chemical property of fluid, needn't change whole measuring system.
2, emission sensor 4 is a ultrasonic sensor, can realize non-contact measurement, so the obstruction of convection cell and very little to the interference of velocity field; Can not make its inefficacy or wearing and tearing because of the caused friction of media flow.
Claims (2)
1. flow meter, it is characterized in that, comprise phaselocked loop driving source circuit (1), the output terminal of phaselocked loop driving source circuit (1) links to each other with the input end of power amplifier (2), the output terminal of power amplifier (2) links to each other with 90 ° of input ends of shifting to circuit (3), 90 ° of output terminals of shifting to circuit (3) link to each other with the input end of shifting to of phaselocked loop driving source circuit (1), the signal output part of power amplifier (2) links to each other with the signal input part of emission sensor (4), the signal input part of phaselocked loop driving source circuit (1) links to each other with the signal output part of receiving sensor (5), another signal end of receiving sensor (5) links to each other with the input end of one-level amplifier (6), the output terminal of one-level amplifier (6) links to each other with the input end of bandpass filter (7), the output terminal of bandpass filter (7) links to each other with the input end of two-stage amplifier (8), the output terminal of two-stage amplifier (8) links to each other with the input end of detecting circuit (9), the output of detecting circuit (9) goes out end and links to each other with the input end of low-pass filter (10), the output terminal of low-pass filter (10) links to each other with the input end of low-pass amplifier (11), the output terminal of low-pass amplifier (11) links to each other with the signal input part of DSP microprocessor (12), each signal end of DSP microprocessor (12) respectively with serial communication port (13), data-carrier store (14), program storage (15), display (16) links to each other.
2, a kind of flow meter according to claim 1 is characterized in that, described emission sensor (4) is a ultrasonic sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910024303A CN101672670A (en) | 2009-10-14 | 2009-10-14 | Flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910024303A CN101672670A (en) | 2009-10-14 | 2009-10-14 | Flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101672670A true CN101672670A (en) | 2010-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910024303A Pending CN101672670A (en) | 2009-10-14 | 2009-10-14 | Flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101672670A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131461A (en) * | 2019-06-24 | 2019-08-16 | 郑州睿联智能科技有限公司 | A kind of novel valve controller |
| CN110131458A (en) * | 2019-06-28 | 2019-08-16 | 郑州睿联智能科技有限公司 | A kind of valve controling circuit being adapted to multiple caliber |
| CN110595554A (en) * | 2019-09-24 | 2019-12-20 | 西安交通大学 | Ultrasonic experimental device and method for casing device |
-
2009
- 2009-10-14 CN CN200910024303A patent/CN101672670A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131461A (en) * | 2019-06-24 | 2019-08-16 | 郑州睿联智能科技有限公司 | A kind of novel valve controller |
| CN110131458A (en) * | 2019-06-28 | 2019-08-16 | 郑州睿联智能科技有限公司 | A kind of valve controling circuit being adapted to multiple caliber |
| CN110595554A (en) * | 2019-09-24 | 2019-12-20 | 西安交通大学 | Ultrasonic experimental device and method for casing device |
| CN110595554B (en) * | 2019-09-24 | 2020-07-28 | 西安交通大学 | Ultrasonic experimental device and method for casing device |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100317 |