CN107449475A - Ultrasonic flowmeter - Google Patents
Ultrasonic flowmeter Download PDFInfo
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- CN107449475A CN107449475A CN201710800631.5A CN201710800631A CN107449475A CN 107449475 A CN107449475 A CN 107449475A CN 201710800631 A CN201710800631 A CN 201710800631A CN 107449475 A CN107449475 A CN 107449475A
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- 238000004458 analytical method Methods 0.000 claims abstract description 59
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- 238000005086 pumping Methods 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The embodiment of the invention discloses a kind of ultrasonic flowmeter, including measurement pipeline and at least one pair of ultrasonic transducer, also include ultrasonic flowmeter transmitter, wherein, ultrasonic flowmeter transmitter includes programming amplifying and automatic growth control module, control module and analysis module, programming amplifying and automatic growth control module are connected with control module, analysis module respectively, wherein, programming amplifying and automatic growth control module, for utilizing two-stage adaptive gain adjustment loop, the amplitude for the electric echo signal that automatic adjusument ultrasonic transducer receives.The embodiment of the present invention in ultrasonic flowmeter by setting the ultrasonic flowmeter transmitter with programming amplifying and automatic growth control module, the electric echo signal received is enabled to adjust loop by two-stage adaptive gain, complete the automatic adjusument of amplitude, the effect of stationary echo electric signal amplitude is reached, the accurate measurement of electric echo signal is realized, meets the requirement of the systematic survey degree of accuracy.
Description
Technical field
The present embodiments relate to flow measurement technology field, more particularly to ultrasonic flowmeter.
Background technology
As one of most advanced, accurate flow measurement instrument in the world at present, ultrasonic flowmeter is in oil, petrochemical industry, change
The occasion extensive use such as the detection of the industry technical process such as work, pharmacy, papermaking, food and energy and trade transaction metering, it can
To be readily determined the volume flow in pipeline.
Existing ultrasonic flowmeter, each transducer be both transmitting transducer, were receive transducer again, can be along medium
Flow direction carries out each passage with reverse alternate transmitting with receiving ultrasonic measurement signal, and by ultrasonic flowmeter transmitter
Following current and the conversion of adverse current propagation time measurement, final output measure the propagation flow velocity and its instantaneous delivery number of pipeline internal medium
According to.
But in existing ultrasonic flowmeter, because the characteristic of transducer has differences and installation dimension has gap,
Cause the difference of the sound path of each passage, in addition the influence in the flow field of pipeline medium, the presence of laminar flow, turbulent flow so that survey every time
It is different to measure the electric echo signal amplitude received, and signal intensity is also unstable.
The content of the invention
The embodiments of the invention provide a kind of ultrasonic flowmeter, by setting programming amplifying in ultrasonic flowmeter transmitter
And automatic growth control mould, the amplitude of automatic adjusument electric echo signal, the accurate measurement of ultrasonic echo electric signal is realized, it is full
The foot requirement of ultrasonic flow meter systems accuracies of measurement.
The embodiments of the invention provide a kind of ultrasonic flowmeter, including measurement pipeline and at least one pair of ultrasonic transducer, go back
Including ultrasonic flowmeter transmitter, wherein,
At least one pair of described ultrasonic transducer, be installed on it is described measurement pipeline tube wall on, and with the ultrasonic flowmeter
Transmitter connects, and for launching ultrasonic signal and receiving ultrasound echo signal, and the ultrasound echo signal is converted into back
Ripple electric signal transmission is to the ultrasonic flowmeter transmitter；
The ultrasonic flowmeter transmitter includes：Programming amplifying and automatic growth control module, control module and analysis mould
Block, programming amplifying and the automatic growth control module are connected with the control module, the analysis module respectively, wherein,
Programming amplifying and the automatic growth control module, for adjusting loop using two-stage adaptive gain, adaptively
Adjust the amplitude for the electric echo signal that the ultrasonic transducer receives；
The control module, for aiding in programming amplifying and the automatic growth control module to complete the electric echo signal
Two-stage adaptive gain adjustment；
The analysis module, the signal sent for receiving programming amplifying and the automatic growth control module, and to institute
State signal to be analyzed, to obtain the propagation flow velocity and instantaneous delivery data of the measurement pipeline internal medium.
The embodiment of the present invention is super with programming amplifying and automatic growth control module by being set in ultrasonic flowmeter
Sonic flowmeter transmitter and measurement pipeline and at least one pair of ultrasonic transducer so that the electric echo signal received is analyzed
Before module analysis processing, loop can be adjusted by two-stage adaptive gain, complete the automatic adjusument of amplitude, reached steady
Determine the effect of electric echo signal amplitude, realize the accurate measurement of electric echo signal, it is accurate to meet ultrasonic flow meter systems measurement
The requirement of exactness.
Brief description of the drawings
Fig. 1 a are the external structure schematic diagrams of the ultrasonic flowmeter in the embodiment of the present invention one；
Fig. 1 b are the structural representations inside the ultrasonic flowmeter Transmitter body in the embodiment of the present invention one；
Fig. 2 is the structural representation of the ultrasonic flowmeter transmitter in the embodiment of the present invention two；
Fig. 3 is the internal structure schematic diagram of the ultrasonic flowmeter in the embodiment of the present invention three.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Present embodiments provide a kind of ultrasonic flowmeter.Fig. 1 a are the ultrasonic flowmeters 100 that the embodiment of the present invention one provides
External structure schematic diagram, as shown in Figure 1a, the flowmeter includes：Measure pipeline 110, at least one pair of ultrasonic transducer 120 and
Ultrasonic flowmeter transmitter 130, wherein,
At least one pair of ultrasonic transducer 120, be installed on measurement pipeline 110 tube wall on, and with ultrasonic flowmeter transmitter
130 connections, for launching ultrasonic signal and receiving ultrasound echo signal, and the ultrasound echo signal is converted into echo electricity
Signal is transmitted to ultrasonic flowmeter transmitter 130.
Exemplary, illustrated by taking single channel ultrasonic flowmeter as an example：
Measure and the mounting seat (not shown) for fixing two ultrasonic transducers 120 is respectively arranged with pipeline 110, two
Ultrasonic transducer 120 can be fixed on by mounting seat on measurement pipeline 110；Terminal box 131, wiring are provided between mounting seat
A part of the box 131 as ultrasonic flowmeter transmitter 130, (do not show in figure with acquisition module wherein can be nursed one's health with setting signal
Go out), the both ends of terminal box 131 can set the interface (not shown) of ultrasonic transducer 120, so as to signal condition and collection mould
Block can be controlled to ultrasonic transducer 120；Terminal box top can set ultrasonic flowmeter Transmitter body 132, and this is super
Sonic flowmeter Transmitter body 132 is connected with the signal condition in terminal box 131 with acquisition module；Ultrasonic flowmeter transmitter master
Programming amplifying and automatic growth control module, analysis module, input/output module, power down protection mould can be set inside body 132
Block, power management module, Man Machine Interface and RAM module (each module is not shown in figure) is extended out, in addition, hypersonic flow
The input-output equipment (not shown) such as button and LCD display can also be fixed with the main body of gauge transmitter.
Fig. 1 b are the structural representations inside the ultrasonic flowmeter Transmitter body 132 that the embodiment of the present invention one provides, such as
Shown in Fig. 1 b, the ultrasonic flowmeter Transmitter body 132 specifically includes following structure：
Programming amplifying and automatic growth control module 1321, control module 1322 and analysis module 1323, programming amplifying and
Automatic growth control module 1321 is connected with control module 1322, analysis module 1323 respectively, wherein,
Programming amplifying and automatic growth control module 1321, for adjusting loop using two-stage adaptive gain, adaptively
The amplitude for the electric echo signal that regulation ultrasonic transducer receives.
For ultrasonic flowmeter, each ultrasonic transducer can both be used as transmitting transducer, can be used as and connect again
Receive transducer.By taking single channel ultrasonic wave flowmeter as an example, if one of ultrasonic transducer is arranged to transmitting transducer, with it
Another corresponding ultrasonic transducer is then configured to receive transducer, and the two can be along media flow direction and media flow
Reverse direction is alternately launched with receiving ultrasonic measurement signal., can be by the ultrasound after ultrasonic transducer receives ultrasound echo signal
Echo-signal is converted into electric echo signal, and sends to the signal analysis and processing module of ultrasonic flowmeter and handled.But by
Being had differences in the characteristic of each ultrasonic transducer, its installation dimension causes the sound path of each passage different there is also gap,
Again due to the influence in pipeline medium flow field, the presence of laminar flow, turbulent flow so that the reception signal measured every time is of different sizes, signal
Intensity is also unstable, therefore, in order to realize the accurate measurement of ultrasonic echo electric signal, it is necessary to which what ultrasonic transducer was received returns
Ripple electric signal carries out automatic feedback gain-adjusted.
In the present embodiment, programming amplifying and automatic growth control module are provided with ultrasonic flowmeter transmitter 130
1321, the programming amplifying and automatic growth control module 1321 can adjust loop by two-stage adaptive gain, realize to returning
The automatic adjusument of ripple electric signal amplitude.
Control module 1322, for aiding in programming amplifying and automatic growth control module 1321 to complete the two of electric echo signal
Level adaptation Gain tuning.
Analysis module 1323, for receiving the signal of programming amplifying and the transmission of automatic growth control module 1321, and to letter
Number analyzed, to obtain measuring the propagation flow velocity and instantaneous delivery data of medium in pipeline 110.
In the present embodiment, for example, the electric echo signal that the ultrasonic transducer 120 along media flow direction is received passes through
After crossing programming amplifying and automatic growth control module 1321 and the regulation of control module 1322, possesses stable and relatively accurate width
Value, after analysis module 1323 receives the electric echo signal of the amplitude stability, is analyzed it using default parser,
Obtain the signal time value along media flow direction.Otherwise above-mentioned flow is repeated, is obtained by signalling channel switching circuit again
To the signal time value along media flow reverse direction, both time differences, converted by a series of analysis, obtain measuring pipeline
The propagation flow velocity and instantaneous delivery data of medium in 110.
The ultrasonic flowmeter that the present embodiment provides, there is programming amplifying and automatic gain by being set in ultrasonic flowmeter
The ultrasonic flowmeter transmitter and measurement pipeline and at least one pair of ultrasonic transducer of control module so that the echo electricity received
Signal can adjust loop by two-stage adaptive gain, complete the adaptive of amplitude before the processing of analyzed module analysis
Regulation, has reached the effect of stationary echo electric signal amplitude, has realized the accurate measurement of electric echo signal, meet ultrasonic flow rate
The requirement of meter systems accuracy of measurement.
Further, ultrasonic flowmeter Transmitter body 132, can also include signal condition and acquisition module, and signal is adjusted
Reason be connected with acquisition module with ultrasonic transducer 120 and control module 1322, for produce high pressure ultrasonic exciting electric signal with
Encourage ultrasonic transducer to produce ultrasonic signal, and control two ultrasonic transducers 120 in same passage in emission function
Switch between receive capabilities and switched over between each passage of signalling channel switching circuit control.
Specifically, signal condition includes signalling channel switching circuit, excitation booster circuit, signal transmitting electricity with acquisition module
Road, signal receiving circuit, wherein,
Signalling channel switching circuit, it is connected with control module 1322 and ultrasonic transducer 120, for controlling in same passage
Two ultrasonic transducers 120 switched between emission function and receive capabilities and each passage between switch over.
Booster circuit is encouraged, is connected with control module 1322 and signal transmission circuit, is produced for receive and control module 1322
Raw pumping signal simultaneously carries out boosting processing, and signal transmission circuit is sent to after obtaining high pressure activation signal.
Signal transmission circuit, also it is connected with ultrasonic transducer 120, for encouraging ultrasound after high pressure activation signal is received
Transducer 120 produces ultrasonic signal.
Signal receiving circuit, it is connected with ultrasonic transducer 120, what the transmitting transducer for receiving same passage was launched
Ultrasonic signal caused ultrasound echo signal under piezo-electric effect is converted into electric echo signal.
The course of work of ultrasonic flowmeter is described in detail by taking single channel ultrasonic flowmeter as an example：
Along media flow clockwise direction, the control of control module 1322 in ultrasonic flowmeter transmitter 130 produces one and swashed
Encourage signal and be sent to excitation booster circuit, at the same control signal channel switching circuit according to preset rules by ultrasonic flowmeter 100
In a ultrasonic transducer 120 be arranged to transmitting transducer, by another ultrasonic transducer 120 be arranged to receive transducing
Device；Excitation booster circuit carries out boosting processing after receiving the pumping signal of the transmission of control module 1322 to it, obtains high pressure and swashs
Signal transmission circuit is sent to after encouraging signal；Signal transmission circuit is produced super using high pressure activation signal excitation transmitting transducer
Acoustic signals；The ultrasonic signal measurement pipeline 110 Propagation for a period of time after, received by receive transducer and turned
Ultrasonic echo electric signal is changed to, receive transducer sends the electric echo signal to programming amplifying and automatic growth control mould afterwards
Block 1321；Control module 1322 aids in programming amplifying and automatic growth control module 1321 to be adjusted back using two-stage adaptive gain
Road carries out automatic adjusument to the amplitude of electric echo signal, and the electric echo signal after the completion of regulation is sent to analysis module
1323 are analyzed and processed；After analysis module 1323 receives the electric echo signal of amplitude stability, using default algorithm to it
Analyzed, obtain the signal time value along media flow direction.Otherwise repeated above-mentioned by signalling channel switching circuit again
Flow, obtain the signal time value along media flow reverse direction, both time differences, converted by a series of analysis, most
Obtain measuring the propagation flow velocity and instantaneous delivery data of pipeline internal medium eventually.
Embodiment two
The present embodiment is on the basis of embodiment one, there is provided the concrete composition of programming amplifying and automatic growth control module
Structure, Fig. 2 is the structural representation for the ultrasonic flowmeter transmitter that the embodiment of the present invention two provides, as shown in Fig. 2 the hypersonic flow
Gauge transmitter 2000 specifically includes following structure：
Signal receiving circuit 2101, primary amplifying circuit 2102, secondary amplification circuit 2103, peak sampling hold circuit
2105th, A/D converter 2106, control module 2200, D/A converter 2107, voltage-regulating circuit 2108, from gain control
Chip 2109, self-adapting type closed-loop feedback circuit 2110, detecting circuit 2111 and analysis module 2300；Wherein signal receiving circuit
2101st, primary amplifying circuit 2102, secondary amplification circuit 2103, peak sampling hold circuit 2105, A/D converter 2106,
D/A converter 2107, voltage-regulating circuit 2108, from gain control chip 2109, self-adapting type closed-loop feedback circuit 2110
Programming amplifying and automatic growth control module 2100 are collectively formed with detecting circuit 2111, herein it should be noted that for letter
Change circuit, A/D converter 2106 and D/A converter 2107 may be arranged as being integrated in control module 2200.
The primary amplifying circuit 2102 of signal receiving circuit 2101, secondary amplification circuit 2103, peak sampling hold circuit
2105th, A/D converter 2106, control module 2200, D/A converter 2107, voltage-regulating circuit 2108, from gain control
Chip 2109, self-adapting type closed-loop feedback circuit 2110 and detecting circuit 2111 connect, wherein, peak sampling hold circuit 2105
Also it is connected with self-adapting type closed-loop feedback circuit 2110, with A/D converter 2106, control module 2200, D/A converter
2107th, voltage-regulating circuit 2108 and from gain control chip 2109 collectively form one-level adaptive gain adjustment loop；Detection
Circuit 2111 is also connected with A/D converter 2106, with control module 2200, D/A converter 2107, voltage-regulating circuit
2108th, two level adaptive gain is collectively formed from gain control chip 2109 and self-adapting type closed-loop feedback circuit 2110 to adjust back
Road.
Signal receiving circuit 2101, for receiving the electric echo signal of ultrasonic transducer transmission；
Primary amplifying circuit 2102, for carrying out preposition amplification to electric echo signal；
Secondary amplification circuit 2103, for carrying out secondary amplification to the electric echo signal after preposition amplification；
In the present embodiment, the amplitude of the electric echo signal sent by ultrasonic transducer is relatively small, for the ease of follow-up place
Reason, primary amplifying circuit 2102, secondary amplification circuit 2103 can be used to carry out two-stage enhanced processing, to obtain amplitude follow-up
Electric echo signal in the range of processing requirement.
Peak sampling hold circuit 2105, in A/D converter 2106 to the echo telecommunications after two-stage is amplified
During number being sampled, make the amplitude held stationary of the electric echo signal after two-stage is amplified, at the same amplitude is steady
Electric echo signal send to self-adapting type closed-loop feedback circuit 2110；
A/D converter 2106, for the stable electric echo signal of amplitude to be converted into the first data signal, and receive inspection
Electric echo signal in the last sampling process that wave circuit 2111 feeds back, and by the electric echo signal in last sampling process
The second data signal is converted to, so that control module 2200 can utilize preset algorithm to believe the first data signal and the second numeral
Number carry out respective handling；
Control module 2200, adjust, and utilize default for carrying out the first proportional-plus-derivative-integration to the first data signal
Algorithm and the second data signal carry out feedback modifiers to the data signal after the first proportional-plus-derivative-integration adjustment, obtain the
Two proportional-plus-derivatives-integration adjustment signal；
D/A converter 2107, for the second proportional-plus-derivative-integration adjustment signal to be converted into analog signal, and by mould
Intend signal to transmit to voltage regulator module 2108；
Voltage-regulating circuit 2108, for adjusting the voltage magnitude of analog signal, to adapt to automatic gaining controling chip
The gain-controlled voltage of input signal；
From gain control chip 2109, for carrying out voltage automatic gain to the analog signal after Overvoltage Amplitude is adjusted
Control；
Self-adapting type closed-loop feedback circuit 2110, also it is connected with analysis module 2300, for steady with the amplitude received
Electric echo signal as reference, the signal exported using predetermined manner to automatic gaining controling chip 2109 adaptively increased
Benefit adjustment, the one-level adaptive gain adjustment control of electric echo signal is realized, and by the signal after adaptive gain adjusts
Send to analysis module 2300；
Detecting circuit 2111, also it is connected with analysis module 2300, for the signal after adaptive gain adjusts to be entered
After the processing such as row filtering, send to analysis module 2300；And signal after treatment is fed back into A/D converter 2106,
Adjusted to carry out the second proportional-plus-derivative-integration to the electric echo signal in sampling process next time, realize electric echo signal
The adjustment control of two level adaptive gain.
Analysis module 2300, for receiving self-adapting type closed-loop feedback circuit 2110 and detecting circuit 2111 sends respectively
Signal, and being analyzed using default parser signal, to obtain measuring the propagation flow velocity of pipeline internal medium and instantaneous
Data on flows.
Ultrasonic flowmeter transmitter in the ultrasonic flowmeter that the present embodiment provides, passes through programming amplifying and automatic gain control
One-level adaptive gain adjustment loop and two level adaptive gain adjustment loop in molding block, make full use of in this sampling
The dual regulation of electric echo signal after electric echo signal and last time two-stage feedback gain adjustment so that received in this sampling
Electric echo signal analyzed module analysis processing before, the automatic adjusument of amplitude can be completed, reached stationary echo
The effect of electric signal amplitude, the accurate measurement of electric echo signal is realized, meets the requirement of the systematic survey degree of accuracy.
By taking single channel ultrasonic flowmeter as an example, the course of work of ultrasonic flowmeter transducer is described in detail：
Along media flow clockwise direction, after electric echo signal is received by signal receiving circuit 2101, put successively by primary
Big circuit 2102, secondary amplification circuit 2103 complete the two-stage amplification of amplitude；Electric echo signal after two-stage is amplified reaches
Peak value sampling circuit 2105 carries out amplitude holding, so that the echo-signal that the sampling of follow-up A/D converter 2106 obtains is amplitude
Stable signal；After the completion of A/D converter 2106 samples, the stable electric echo signal of amplitude is converted into the first numeral and believed
Number, the electric echo signal in last sampling process that detecting circuit 2111 feeds back is converted into the second data signal, and by
One data signal and the second data signal are sent to control module 2200；Control module 2200 carries out first to the first data signal
Proportional-plus-derivative-integration adjustment, and using preset algorithm and the second data signal to after the first proportional-plus-derivative-integration adjustment
Data signal carry out feedback modifiers, obtain the second proportional-plus-derivative-integration adjustment signal, and by the second proportional-plus-derivative-integration
Adjustment signal is sent to D/A converter 2107；D/A converter 2107 changes the second proportional-plus-derivative-integration adjustment signal
After analog signal, voltage-regulating circuit 2108 is sent the signal to；Voltage-regulating circuit 2108 adjusts the voltage of analog signal
After amplitude, send the signal to from gain control chip 2109；From gain control chip 2109 to after Overvoltage Amplitude is adjusted
Analog signal carry out voltage automatic growth control after, send the signal to self-adapting type closed-loop feedback circuit 2110；Adaptively
Amplitude stable electric echo signal of the formula closed-loop feedback circuit 2110 to receive is increased as reference using predetermined manner to automatic
The signal that beneficial control chip 2109 exports carries out adaptive gain adjustment, realizes the one-level adaptive gain adjustment of electric echo signal
Control, and the signal after adaptive gain adjusts is sent to analysis module 2300；Detecting circuit 2111 will pass through adaptive
After answering the signal after Gain tuning the processing such as to be filtered, send to analysis module 2300；It is and signal after treatment is anti-
A/D converter 2106 is fed to, to carry out the second proportional-plus-derivative-integration to the electric echo signal in sampling process next time
Adjustment, realize the two level adaptive gain adjustment control of electric echo signal；Analysis module 2300 is receiving self-adapting type closed loop
After the signal that feedback circuit 2110 and detecting circuit 2111 are sent respectively, signal is analyzed using default parser,
Obtain the signal time value along media flow direction.Otherwise above-mentioned flow is repeated, is obtained by signalling channel switching circuit again
To the signal time value along media flow reverse direction, both time differences, converted by a series of analysis, finally give measurement
The propagation flow velocity and instantaneous delivery data of pipeline internal medium.
Further, the control module of ultrasonic flowmeter transmitter can preferably include ARM control chips.
Further, the analysis module of ultrasonic flowmeter transmitter can preferably include field programmable gate array CPLD cores
Piece.
Further, ultrasonic flowmeter transmitter can also include：
Input/output module, be connected with control module and analysis module, for receive user input control signal and
The information that output control module and analysis module obtain, the module can include 4~20mA electric current loops, impulse output circuit,
RS485 communication interfaces.
Power down protection module, is connected with control module and analysis module, in ultrasonic flowmeter electricity shortage or power-off
When, the parameter of ultrasonic flowmeter and continuous data are stored in the memory cell of ultrasonic flowmeter transmitter.
Power management module, with programming amplifying and automatic growth control module, analysis module, input/output module and power down
Protection module connects, for for programming amplifying and automatic growth control module, analysis module, input/output module and power down protection
Module provides power supply.
Man Machine Interface, it is connected with control module and analysis module, for connecting external input device and display device,
To realize man-machine interaction.
RAM module is extended out, is connected with control module and analysis module, it is empty for the storage when control module and analysis module
Between it is insufficient when, data storage.
Embodiment three
Fig. 3 is the internal structure schematic diagram for the ultrasonic flowmeter that the embodiment of the present invention three provides, as shown in figure 3, hypersonic flow
Power management module 327 in gauge transmitter 320 respectively with terminal box 3210, programming amplifying and automatic growth control module
322nd, control module 323, analysis module 324, input/output module 325, power down protection module 326, the and of Man Machine Interface 328
RAM module 329 is extended out to connect and power for it；Control module 323 controls the signal condition and acquisition module in terminal box 3210
321 excitation ultrasonic transducers 310 produce ultrasonic signal；Programming amplifying and automatic growth control module 322 receive ultrasonic transducer
The 310 ultrasonic echo electric signals sent, aided in completing the adjustment control of two-stage adaptive gain by control module 323, will adjusted afterwards
Signal after whole sends to analysis module 324 and handled.Wherein control module 323 and analysis module 324 can be integrated into a control
Analysis module processed.Input/output module 325, power down protection module 326, Man Machine Interface 328 and to extend out RAM module 329 equal
It is connected with control analysis module, to realize respective function.
The ultrasonic flowmeter that the present embodiment provides, there is programming amplifying and automatic gain by being set in ultrasonic flowmeter
The ultrasonic flowmeter transmitter and at least one pair of ultrasonic transducer of control module so that the electric echo signal received is being divided
Before analysing module analysis processing, loop can be adjusted by two-stage adaptive gain, complete the automatic adjusument of amplitude, reach
The effect of stationary echo electric signal amplitude, the accurate measurement of electric echo signal is realized, meet ultrasonic flow meter systems measurement
The requirement of the degree of accuracy.
Pay attention to, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of ultrasonic flowmeter, including measurement pipeline and at least one pair of ultrasonic transducer, it is characterised in that also including hypersonic flow
Gauge transmitter, wherein,
At least one pair of described ultrasonic transducer, be installed on it is described measurement pipeline tube wall on, and with the ultrasonic flowmeter pick-up
Device connects, and for launching ultrasonic signal and receiving ultrasound echo signal, and the ultrasound echo signal is converted into echo electricity
Signal is transmitted to the ultrasonic flowmeter transmitter；
The ultrasonic flowmeter transmitter includes：Programming amplifying and automatic growth control module, control module and analysis module, institute
Programming amplifying and automatic growth control module is stated to be connected with the control module, the analysis module respectively, wherein,
Programming amplifying and the automatic growth control module, for utilizing two-stage adaptive gain adjustment loop, automatic adjusument
The amplitude for the electric echo signal that the ultrasonic transducer receives；
The control module, for aiding in programming amplifying and the automatic growth control module to complete the two of the electric echo signal
Level adaptation Gain tuning；
The analysis module, the signal sent for receiving programming amplifying and the automatic growth control module, and to the letter
Number analyzed, to obtain the propagation flow velocity and instantaneous delivery data of the measurement pipeline internal medium.
2. ultrasonic flowmeter according to claim 1, it is characterised in that programming amplifying and the automatic growth control mould
Block, including：Signal receiving circuit, primary amplifying circuit, secondary amplification circuit, peak sampling hold circuit, A/D converter,
D/A converter, voltage-regulating circuit, from gain control chip, self-adapting type closed-loop feedback circuit and detecting circuit, the letter
Number receiving circuit, primary amplifying circuit, secondary amplification circuit, peak sampling hold circuit, A/D converter, control module,
D/A converter, voltage-regulating circuit, connect successively from gain control chip, self-adapting type closed-loop feedback circuit and detecting circuit
Connect, wherein, the signal receiving circuit, the electric echo signal sent for receiving the ultrasonic transducer；
The primary amplifying circuit, for carrying out preposition amplification to the electric echo signal；
The secondary amplification circuit, for carrying out secondary amplification to the electric echo signal after preposition amplification；
The peak sampling hold circuit, also it is connected with the self-adapting type closed-loop feedback circuit, in A/D converter pair
During electric echo signal after two-stage is amplified is sampled, make the electric echo signal after two-stage is amplified
Amplitude held stationary, while the stable electric echo signal of the amplitude is sent to the self-adapting type closed-loop feedback circuit；
The A/D converter, for the stable electric echo signal of the amplitude to be converted into the first data signal, and receive institute
The electric echo signal in the last sampling process of detecting circuit feedback is stated, and by the electric echo signal in last sampling process
The second data signal is converted to, so that the control module can utilize preset algorithm to first data signal and described the
Two digital signal carries out respective handling；
The control module, adjust, and utilize default for carrying out the first proportional-plus-derivative-integration to first data signal
Algorithm and second data signal carry out feedback modifiers to the data signal after the first proportional-plus-derivative-integration adjustment, obtain
To the second proportional-plus-derivative-integration adjustment signal；
The D/A converter, for the second proportional-plus-derivative-integration adjustment signal to be converted into analog signal, and by the mould
Intend signal to transmit to the voltage regulator module；
The voltage-regulating circuit, for adjusting the voltage magnitude of the analog signal, to adapt to the automatic growth control core
The gain-controlled voltage of the input signal of piece；
It is described from gain control chip, for carrying out voltage automatic gain control to the analog signal after Overvoltage Amplitude is adjusted
System；
The self-adapting type closed-loop feedback circuit, is also connected with the analysis module, for smoothly being returned with the amplitude received
For ripple electric signal as reference, the signal exported using predetermined manner to the automatic gaining controling chip carries out adaptive gain tune
It is whole, the one-level adaptive gain adjustment control of electric echo signal is realized, and the signal after adaptive gain adjusts is sent
To the analysis module；
The detecting circuit, also it is connected with the analysis module and the A/D converter, is adjusted for adaptive gain will to be passed through
After signal after whole is handled, send to the analysis module；And signal after treatment is fed back into the analog and turned
Parallel operation, adjusted to carry out the second proportional-plus-derivative-integration to the electric echo signal in sampling process next time, realize echo electricity
The two level adaptive gain adjustment control of signal.
3. ultrasonic flowmeter according to claim 1, it is characterised in that the ultrasonic flowmeter transmitter also includes：Letter
Number conditioning and acquisition module, the signal condition and acquisition module, be connected with the ultrasonic transducer and the control module, use
In producing high pressure ultrasonic exciting electric signal to encourage the ultrasonic transducer generation ultrasonic signal, and control same
Two ultrasonic transducers in passage switch between emission function and receive capabilities and with signalling channel switching circuits
Control and switch between each passage.
4. ultrasonic flowmeter according to claim 1, it is characterised in that the control module includes ARM control chips.
5. ultrasonic flowmeter according to claim 1, it is characterised in that the analysis module includes field-programmable gate array
Arrange CPLD chips.
6. according to the ultrasonic flowmeter described in claim any one of 1-5, it is characterised in that the ultrasonic flowmeter transmitter is also
Including：
Input/output module, it is connected with the control module and the analysis module, for receiving the control signal of user's input
And export the information that the control module and the analysis module obtain.
7. ultrasonic flowmeter according to claim 6, it is characterised in that the ultrasonic flowmeter transmitter also includes：
Power down protection module, it is connected with the control module and the analysis module, for being powered not in the ultrasonic flowmeter
When foot or power-off, the parameter of the ultrasonic flowmeter and continuous data are stored in the storage list of the ultrasonic flowmeter transmitter
In member.
8. ultrasonic flowmeter according to claim 7, it is characterised in that the ultrasonic flowmeter transmitter also includes：
Power management module, with the programming amplifying and automatic growth control module, the analysis module, the input and output mould
Block connects with the power down protection module, for for the programming amplifying and automatic growth control module, the analysis module, institute
State input/output module and the power down protection module provides power supply.
9. ultrasonic flowmeter according to claim 8, it is characterised in that the ultrasonic flowmeter transmitter also includes：
Man Machine Interface, it is connected with the control module and the analysis module, for connecting external input device and display
Equipment, to realize man-machine interaction.
10. ultrasonic flowmeter according to claim 9, it is characterised in that the ultrasonic flowmeter transmitter also includes：
RAM module is extended out, is connected with the control module and the analysis module, for when the control module and the analysis
During the memory space inadequate of module, data storage.
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|---|---|---|---|
| CN201710800631.5A CN107449475B (en) | 2017-09-07 | 2017-09-07 | Ultrasonic flowmeter |
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| CN107449475B CN107449475B (en) | 2024-03-19 |
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| CN109682432A (en) * | 2019-01-29 | 2019-04-26 | 安徽天康(集团)股份有限公司 | A kind of ultrasonic measurement steam-flow meter |
| CN112414483A (en) * | 2020-11-10 | 2021-02-26 | 宁波智复物联科技有限公司 | Self-adaptive method for acquiring metering signals of ultrasonic water meter |
| CN112857490A (en) * | 2021-01-15 | 2021-05-28 | 深圳市宏电技术股份有限公司 | Flow calculation device and calculation method |
| CN112971533A (en) * | 2021-03-04 | 2021-06-18 | 佛山市顺德区美的洗涤电器制造有限公司 | Control method and control device for water dispenser, storage medium and processor |
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| CN115112190A (en) * | 2021-03-09 | 2022-09-27 | 浙江天信仪表科技有限公司 | Echo acquisition, flow measurement system and method for ultrasonic metering instruments |
| CN115144041A (en) * | 2022-06-30 | 2022-10-04 | 东北大学 | A multi-channel ultrasonic flowmeter system |
| CN116625444A (en) * | 2023-03-13 | 2023-08-22 | 宁夏隆基宁光仪表股份有限公司 | A method of ultrasonic water meter characteristic wave self-adaptation and flow correction |
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