CN207798170U - Flowmeter based on mixing - Google Patents

Flowmeter based on mixing Download PDF

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Publication number
CN207798170U
CN207798170U CN201721873009.9U CN201721873009U CN207798170U CN 207798170 U CN207798170 U CN 207798170U CN 201721873009 U CN201721873009 U CN 201721873009U CN 207798170 U CN207798170 U CN 207798170U
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China
Prior art keywords
frequency
signal
waveform signal
frequency waveform
receiving transducer
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Withdrawn - After Issue
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CN201721873009.9U
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Chinese (zh)
Inventor
潘凌
武治国
张春萍
李立春
陈鹏
徐标
沈海超
徐景峰
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Wuhan Institute of Technology
Wuhan Newfiber Optoelectronics Co Ltd
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Wuhan Institute of Technology
Wuhan Newfiber Optoelectronics Co Ltd
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Priority to CN201721873009.9U priority Critical patent/CN207798170U/en
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Abstract

The utility model discloses a kind of flowmeters based on mixing.The flowmeter of the utility model no longer does support to improve the measurement sensitivity of flowmeter by the hardware component of high-performance, high operational capability and large capacity, but the frequency that the waveform signal of microcontroller will be inputted by the way of mixing is reduced, phase acquisition is carried out to the waveform signal of upper frequency so as to avoid using the hardware component of high-performance, high operational capability and large capacity, preferable sensitivity is realized using simple circuit, requirement and the cost of hardware component are reduced, hardware cost is reduced while improving measurement accuracy.

Description

Flowmeter based on mixing
Technical field
The utility model is related to flowmeter technology field more particularly to a kind of flowmeters based on mixing.
Background technology
The prior art, in flow velocity measurement, flowmeter of the time difference method based on mixing is in the water using size different in flow rate The different principle of the spread speed of sound, the time of sound transmission between two ultrasonic probes is measured using time measurement means Difference is to calculate the flow velocity of water outlet.In existing time difference method based in the flowmeter of mixing, the first time difference computational methods is: CPLD time of measuring methods;It is described in CPLD time of measuring method with Complex Programmable Logic Devices (Complex Programmable Logic Device, abridge CPLD) time of measuring difference be core technology carry out flowmeter exploitation, it is such Technical solution is received by transducer drive, energy converter, signal amplification, level compares, the CPLD times acquire and microcontroller operation.
Second of time difference computational methods be:It is poor to carry out time of measuring in the method for measuring phase difference;Its principle is exactly by super Sonic probe emits the ultrasonic wave of a certain frequency, then acquires and compare the phase difference than frequency reception signal and preset signals, Two-way letter is obtained by fast algorithm (Fast Fourier Transformation, abridge FFT) method of discrete fourier transform Number time difference so that extrapolate flow rate information;Such technical solution is:Transducer drive, energy converter receive, signal amplifies, phase Position information collection, the acquisition of FFT phase times and microcontroller operation.As shown in FIG. 1, FIG. 1 is used in the prior art to measure phase The method of potential difference carrys out the circuit structure block diagram that time of measuring difference determines flow rate of water flow.
Above-mentioned CPLD time of measuring method cannot be satisfied the flow velocity measurement for completing low flow velocity on time difference acquisition precision, press The flowmeter of CPLD time of measuring methods can only measure the flow velocity of 0.3m/s or more in pipe with small pipe diameter.Measure the side of phase difference Method can obtain better measurement accuracy, but need a large amount of numerical operation and data space, then more multioperation is needed on hardware Ability and memory headroom are supported, cause development cost higher, how on the basis of the method for the measurement phase difference of the prior art, Ensureing reduces hardware cost while measurement accuracy is a problem to be solved.
Above- mentioned information is only used for individual character and understands the technical solution of the utility model, does not represent and recognizes that above- mentioned information is existing Technology.
Utility model content
The main purpose of the utility model is to provide a kind of flowmeters based on mixing, it is intended to solve it is above-mentioned can not be low The technical issues of precision for measuring flow velocity is improved in the case of hardware configuration.
To achieve the above object, the utility model provides a kind of flowmeter based on mixing, the flow based on mixing Meter includes:Waveform generator, transmitting probe, receiving transducer and mixting circuit, the waveform generator and the hair It penetrates probe and the mixting circuit is respectively connected with, the receiving transducer is connected with the mixting circuit;
The waveform generator, for generating first frequency waveform signal and second frequency waveform signal, described Difference on the frequency between one frequency waveform signal and second frequency waveform signal is predeterminated frequency;
The waveform generator is additionally operable to the first frequency waveform signal and the second frequency waveform signal It is sent to the mixting circuit, and the first frequency waveform signal is also sent to the transmitting probe;
The transmitting probe passes through the flow in pipeline for emitting the first frequency waveform signal into pipeline It is transmitted to the receiving transducer;
The receiving transducer, the third frequency wave obtained by flow transmission for receiving the first frequency waveform signal Shape signal, and the third frequency waveform signal is sent to the mixting circuit;
The mixting circuit, for the first frequency waveform signal to be mixed with the second frequency waveform signal First via mixed frequency signal is obtained, the second frequency waveform signal and the third frequency waveform signal be mixed obtains the Two road mixed frequency signals, and the first via mixed frequency signal and second road mixed frequency signal are sent to microcontroller, so that described Microcontroller determines the flow velocity of the flow according to the first via mixed frequency signal and second road mixed frequency signal.
Preferably, the flowmeter based on mixing further includes:First amplifying circuit, first amplifying circuit are connected to Between the receiving transducer and the mixting circuit;
The receiving transducer is additionally operable to the third frequency waveform signal being sent to first amplifying circuit;
First amplifying circuit, for the third frequency waveform signal to be amplified, by the third frequency of amplification Waveform signal is sent to the mixting circuit.
Preferably, the transmitting probe is additionally operable to the first frequency waveform signal being converted to ultrasonic wave, and will be described Ultrasonic wave emits to the pipeline, and the receiving transducer is transmitted to by the flow in the pipeline;
The receiving transducer, is additionally operable to convert the waves into the third frequency waveform signal, and by described Three frequency waveform signals are sent to the mixting circuit.
Preferably, the flowmeter based on mixing further includes:Second amplifying circuit, second amplifying circuit with it is described Mixting circuit connects;
Second amplifying circuit, for putting the first via mixed frequency signal and second road mixed frequency signal Greatly, the first via mixed frequency signal of amplification and the second road mixed frequency signal of amplification are sent to the microcontroller.
Preferably, the mixting circuit includes first via frequency mixer and No. second frequency mixer;
The first via frequency mixer, for carrying out the first frequency waveform signal and the second frequency waveform signal Mixing obtains first via mixed frequency signal, and the first via mixed frequency signal is sent to second amplifying circuit;
No. second frequency mixer, for carrying out the second frequency waveform signal and the third frequency waveform signal Mixing obtains the second road mixed frequency signal, and second road mixed frequency signal is sent to second amplifying circuit.
Preferably, the flowmeter based on mixing further includes:Switching circuit, the switching circuit are connected to the transmitting Between probe and the receiving transducer;
The switching circuit, for switching over the transmitting probe and the receiving transducer.
Preferably, the switching circuit includes:First switch and second switch, the first switch are connected to the transmitting Between probe and the waveform generator, the second switch is connected to the receiving transducer and second amplifying circuit Between, also, the first switch is also connect with the receiving transducer, and the second switch is also connect with the transmitting probe;
The first switch, for connecting the transmitting probe or the receiving transducer;
The second switch, for when the first switch connects the transmitting probe, connecting the receiving transducer, When the first switch connects the receiving transducer, the transmitting probe is connected.
Preferably, the waveform generator includes:It is sequentially connected earth signal generator, driving circuit and energy converter;
The signal generator, for generating first frequency waveform signal and second frequency waveform signal, by described first Frequency waveform signal and second frequency waveform signal are sent to the mixting circuit, and the first frequency waveform signal is also sent out It send to the transmitting probe;
The driving circuit triggers the energy converter for passing through the first frequency waveform signal;
The first frequency waveform signal when for being triggered, is sent to the transmitting probe by the energy converter.
It should be noted that the process calculated in microcontroller, consistent with the prior art, therefore, in the calculating of flow velocity Level is not made in the present embodiment and being correspondingly improved, that is, the improvement of method level is not present.
The flowmeter of the utility model is no longer supported by the hardware component of high-performance, high operational capability and large capacity Improve the measurement sensitivity of flowmeter, but the frequency that the waveform signal of microcontroller will be inputted by the way of mixing reduced, The waveform signal of upper frequency is carried out so as to avoid using the hardware component of high-performance, high operational capability and large capacity Phase acquisition realizes preferable sensitivity using simple circuit, reduces requirement and the cost of hardware component, improves and measure Hardware cost is reduced while precision.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the utility model flowmeter structure block diagram in the prior art;
Fig. 2 is a kind of flowmeter structure frame based on mixing of the flowmeter first embodiment based on mixing of the utility model Figure;
Fig. 3 is a kind of flowmeter structure frame based on mixing of the flowmeter second embodiment based on mixing of the utility model Figure.
Drawing reference numeral explanation:
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction be only used for explain it is opposite between each component under a certain particular pose (as shown in the picture) Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes correspondingly.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one A this feature.In addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill Personnel can be implemented as basis, will be understood that this technical side when the combination of technical solution appearance is conflicting or cannot achieve The combination of case is not present, also not within the protection domain of the requires of the utility model.
It is a kind of flow based on mixing of the flowmeter first embodiment based on mixing of the utility model with reference to Fig. 2, Fig. 2 Count structure diagram.
As shown in Fig. 2, the flowmeter 00 based on mixing includes:The flowmeter based on mixing includes:Waveform is believed Number generator 10, transmitting probe 20, receiving transducer 30 and mixting circuit 40, the waveform generator 10 and transmitting spy First 20 and the mixting circuit 40 be respectively connected with, the receiving transducer 30 is connected with the mixting circuit 40;
The waveform generator 10, it is described for generating first frequency waveform signal and second frequency waveform signal Difference on the frequency between first frequency waveform signal and second frequency waveform signal is predeterminated frequency;
The waveform generator 10 is additionally operable to believe the first frequency waveform signal and the second frequency waveform Number it is sent to the mixting circuit 40, and the first frequency waveform signal is also sent to the transmitting probe 20;
The transmitting probe 20 passes through the water in pipeline for emitting the first frequency waveform signal into pipeline It is streamed to the receiving transducer 30;
The receiving transducer 30, the third frequency obtained by flow transmission for receiving the first frequency waveform signal Waveform signal, and the third frequency waveform signal is sent to the mixting circuit 40;
The mixting circuit 40, for mixing the first frequency waveform signal and the second frequency waveform signal Frequency obtains first via mixed frequency signal, and the second frequency waveform signal is carried out being mixed acquisition with the third frequency waveform signal Second road mixed frequency signal, and the first via mixed frequency signal and second road mixed frequency signal are sent to microcontroller, so that institute State the flow velocity that microcontroller determines the flow according to the first via mixed frequency signal and second road mixed frequency signal.
It should be understood that usually the first frequency waveform signal and the second frequency waveform signal pass through the waveform Signal generator 10 generates, and the waveform generator 10 can be by the first frequency waveform signal and the second frequency wave The first via frequency mixer that shape signal is sent to the mixting circuit 40 is mixed, and the first via mixed frequency signal of 1KHZ is obtained.
It should be noted that in order to calculate the flow velocity of flow, the waveform generator 10 can also be by first frequency Rate waveform signal is emitted by the transmitting probe 20 to pipeline, and the receiving transducer 30 is transmitted to by the flow of pipeline.
It should be understood that in order to calculate the flow velocity of flow, usually the first frequency waveform signal is visited by emitting The first frequency waveform signal is converted into ultrasonic wave by first 20, and the ultrasonic wave is emitted to pipeline, by pipeline Flow is transmitted to receiving transducer 30, and the receiving transducer 30 converts the ultrasonic wave, is converted into the third frequency wave Shape signal, and the third frequency waveform signal is sent to the mixting circuit 40, in the present embodiment, the transmitting probe 20, it is additionally operable to the first frequency waveform signal being converted to ultrasonic wave, and the ultrasonic wave is emitted to the pipeline, pass through Flow in the pipeline is transmitted to the receiving transducer 30;The receiving transducer 30 is additionally operable to convert the waves into The third frequency waveform signal, and the third frequency waveform signal is sent to the mixting circuit 40.
It should be understood that usually the default frequency difference is 1KHZ, the first frequency waveform signal could be provided as frequency For the waveform signal of 1MHZ, then the second frequency waveform signal is the waveform signal that frequency is 1.001MHZ, the mixing electricity Road 40 obtains first via mixing for the first frequency waveform signal and the second frequency waveform signal to be mixed The frequency of signal, the first via mixed frequency signal is 1KHZ, in order to calculate the flow velocity of flow, usually by the first frequency wave The first frequency waveform signal is converted into ultrasonic wave by shape signal by transmitting probe, and the ultrasonic wave is emitted to pipe Road is transmitted to receiving transducer by the flow in pipeline, and the receiving transducer converts the ultrasonic wave, is converted into described Third frequency waveform signal, the frequency phase of the frequency of the third frequency waveform signal and the first frequency waveform signal Together, and by the third frequency waveform signal it is sent to the mixting circuit, the mixting circuit is by the third frequency waveform Signal is mixed with the second frequency waveform signal, obtains second road mixed frequency signal, second road mixed frequency signal Frequency be 1KHZ, that is to say, that by frequency mixing technique, the frequency of signal is all reduced, the signal of lower frequency is carried out Phase acquisition need not increase hardware cost.
It should be noted that frequency mixing technique is not used in the prior art, as shown in Figure 1, directly passing through the microcontroller pair The first frequency waveform signal and the third frequency waveform signal carry out phase acquisition, according to the phase calculation phase of acquisition Difference, according to the flow velocity of phase difference calculating flow.Because of the first frequency waveform signal and second frequency waveform signal without mixing Frequency it is all very high, for example be all 1MHZ, acquisition phase caused to need very powerful hardware supported, cost very high.However, this reality Example is applied by the mixting circuit to the first frequency waveform signal, second frequency waveform signal and the third frequency waveform Signal divides two-way to be mixed, and the first via mixed frequency signal of acquisition and the frequency of second road mixed frequency signal are all 1KHZ, frequencies go lower reduce hardware cost, while also ensuring measurement accuracy.
In the concrete realization, the microcontroller is by acquiring the first phase of the first via mixed frequency signal, and acquires institute The second phase for stating the second road mixed frequency signal calculates phase difference, further according to institute according to the first phase and the second phase State the flow velocity of flow described in phase difference calculating.Microcontroller acquisition phase and be all existing according to the flow velocity of the phase difference calculating flow There is technology, the core technology of the present embodiment is that the frequency of signal to be collected is reduced using frequency mixing technique, to reduce hardware It is required that having saved cost.
It should be noted that the process calculated in microcontroller, consistent with the prior art, therefore, in the calculating of flow velocity Level is not made in the present embodiment and being correspondingly improved, that is, the improvement of method level is not present.
The flowmeter of the present embodiment no longer by the hardware component of high-performance, high operational capability and large capacity do support come The measurement sensitivity of flowmeter is improved, but the frequency that the waveform signal of microcontroller will be inputted by the way of mixing is reduced, from And it avoids and phase is carried out to the waveform signal of upper frequency using the hardware component of high-performance, high operational capability and large capacity Position acquisition realizes preferable sensitivity using simple circuit, reduces requirement and the cost of hardware component, improves and measure essence Hardware cost is reduced while spending.
With reference to Fig. 3, a kind of the second reality of flowmeter based on mixing of the utility model is proposed based on above-mentioned first embodiment Apply example.
In the present embodiment, as shown in figure 3, the flowmeter 00 based on mixing further includes:First amplifying circuit 50, institute The first amplifying circuit 50 is stated to be connected between the receiving transducer 30 and the mixting circuit 40;
The receiving transducer 30 is additionally operable to the third frequency waveform signal being sent to first amplifying circuit 50;
First amplifying circuit 50, for the third frequency waveform signal to be amplified, by the third frequency of amplification Rate waveform signal is sent to the mixting circuit 40.
It should be noted that the first frequency waveform signal is converted to ultrasonic wave by the transmitting probe, and will be described Ultrasonic wave is transmitted to the receiving transducer 30 by flow, and the receiving transducer 30 is converted to the ultrasonic wave transmitted by flow The third frequency waveform signal, the third frequency waveform signal is usually fainter, by first amplifying circuit 50 The third frequency waveform signal is amplified, the third frequency waveform signal of amplification could be preferably by the mixting circuit Identification, and realize mixing.
In the present embodiment, the flowmeter 00 based on mixing further includes:Second amplifying circuit 60, second amplification Circuit 60 is connect with the mixting circuit 40;
Second amplifying circuit 60, for putting the first via mixed frequency signal and second road mixed frequency signal Greatly, the first via mixed frequency signal of amplification and the second road mixed frequency signal of amplification are sent to the microcontroller.
It should be understood that the signal that the mixting circuit 40 is sent out is usually fainter, it is not easy by the microcontroller 10 Identification, in order to make signal be more prone to be identified by the microcontroller 10, usually between the mixting circuit 40 and the microcontroller Second amplifying circuit 60 is connected, by second amplifying circuit 60 by the first via mixed frequency signal and second tunnel Mixed frequency signal is amplified, and the first via mixed frequency signal of amplification and the second road mixed frequency signal are easier to be identified.
It will be appreciated that in order to improve efficiency, the mixting circuit 40 includes two-way mixting circuit, and electricity is mixed by two-way The first frequency waveform signal and the second frequency waveform signal are mixed by road respectively, and frequently by the third Rate waveform signal is sent to the mixting circuit, and the mixting circuit is by the third frequency waveform signal and the second frequency Waveform signal is mixed, and in the present embodiment, the mixting circuit includes first via frequency mixer and No. second frequency mixer;Described Frequency mixer all the way obtains the first via for the second frequency waveform signal be mixed the first frequency waveform signal Mixed frequency signal, and the first via mixed frequency signal is sent to second amplifying circuit 60;No. second frequency mixer, is used for The second frequency waveform signal and the third frequency waveform signal be mixed and obtain the second road mixed frequency signal, and by institute It states the second road mixed frequency signal and is sent to second amplifying circuit 60.
It will be appreciated that in order to calculate the flow velocity of flow, it usually can also be by the transmitting probe 20 and the receiving transducer 30 are switched over by switching circuit so that the transmitting probe 20 switches to receiving transducer, for receiving the first frequency Waveform signal;The receiving transducer 30 is converted to transmitting probe, for emitting the first frequency waveform signal.First frequency Rate waveform signal is converted to ultrasonic wave by transmitting probe and emits to pipeline, and being transmitted to reception by the flow in the pipeline visits Head, transmitting probe and receiving transducer, because of flow direction difference, transmit the ultrasonic wave and disappear into before and after switching over switching circuit excessively The time of consumption is also different, and corresponding flow rate of water flow is calculated using this time difference.In the present embodiment, the flow based on mixing Meter further includes:Switching circuit, the switching circuit are connected between the transmitting probe and the receiving transducer;The switching electricity Road, for switching over the transmitting probe and the receiving transducer.
It should be understood that in order to simplify circuit and cost-effective, the switching circuit can be by simply switching realization, will Two switches in parallel between the transmitting probe 20 and the receiving transducer 30, and a switch occurs with the waveform signal Device connects, another switch is connected with second amplifying circuit, by switching two in the transmitting probe 20 and described It is switched between receiving transducer 30, realizes the switching between the transmitting probe 20 and the receiving transducer 30.The present embodiment In, the switching circuit includes:First switch and second switch, the first switch are connected to the transmitting probe and the wave Between shape signal generator 10, the second switch is connected between the receiving transducer and second amplifying circuit 60, and And the first switch is also connect with the receiving transducer, the second switch is also connect with the transmitting probe;Described first Switch, for connecting the transmitting probe or the receiving transducer;The second switch, for connecting institute in the first switch When stating transmitting probe, the receiving transducer is connected, when the first switch connects the receiving transducer, the transmitting is connected and visits Head.When the first switch connects the transmitting probe, the second switch connects the receiving transducer, then the transmitting probe First frequency waveform signal for receiving the transmission of the waveform generator 10, and emit the first frequency waveform letter Number, the receiving transducer is for receiving signal;When the first switch connects the receiving transducer, the second switch connects institute Transmitting probe is stated, then the transmitting probe is for receiving signal, and the receiving transducer is for receiving the waveform generator The 10 first frequency waveform signals sent, and emit the first frequency waveform signal, that is, realize the transmitting probe and institute State the switching between receiving transducer.
In the concrete realization, waveform signal is usually that signal generator generates, usually in the waveform generator 10 In energy converter when being triggered, the first frequency waveform signal is sent to the transmitting probe 20, the energy converter touches Hair is usually that driving circuit is realized by the first frequency waveform signal, in the present embodiment, the waveform generator 10 Including:It is sequentially connected earth signal generator, driving circuit and energy converter;The signal generator, for generating first frequency wave The first frequency waveform signal and second frequency waveform signal are sent to described mixed by shape signal and second frequency waveform signal Frequency circuit;The driving circuit triggers the energy converter for passing through the first frequency waveform signal;The transducing The first frequency waveform signal when for being triggered, is sent to the transmitting probe by device.
Faint signal is amplified by the present embodiment by the first amplifying circuit and the second amplifying circuit so that amplification Signal afterwards is easier identification, is conducive to identification of the subsequent conditioning circuit to amplified signal, and time difference method flow is measured in respect of higher flow velocity Sensitivity can measure out the flow velocity of 0.02m/s and still can reach preferable sensitivity in the caliber of small size, be detection pipeline The flow rate of middle fluid provides sound assurance;1% can be reached in measurement accuracy, accomplish that pipeline fluid flow rate is steady Location survey amount and not test leakage.The method of the present embodiment application is propped up without the hardware component of high-performance, high operational capability, large capacity Support simplifies hardware consumption, has saved hardware cost.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention, Under every utility model in the utility model is conceived, equivalent structure made based on the specification and figures of the utility model Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (8)

1. a kind of flowmeter based on mixing, which is characterized in that the flowmeter based on mixing includes:Waveform signal occurs Device, transmitting probe, receiving transducer and mixting circuit, the waveform generator and the transmitting probe and the mixting circuit It is respectively connected with, the receiving transducer is connected with the mixting circuit;
The waveform generator, for generating first frequency waveform signal and second frequency waveform signal, first frequency Difference on the frequency between rate waveform signal and second frequency waveform signal is predeterminated frequency;
The waveform generator is additionally operable to send the first frequency waveform signal and the second frequency waveform signal To the mixting circuit, and the first frequency waveform signal is also sent to the transmitting probe;
The transmitting probe is transmitted for emitting the first frequency waveform signal into pipeline by the flow in pipeline To the receiving transducer;
The receiving transducer, the third frequency waveform letter obtained by flow transmission for receiving the first frequency waveform signal Number, and the third frequency waveform signal is sent to the mixting circuit;
The mixting circuit, for carrying out being mixed acquisition the first frequency waveform signal with the second frequency waveform signal First via mixed frequency signal, the second frequency waveform signal and the third frequency waveform signal be mixed obtains the second tunnel Mixed frequency signal, and the first via mixed frequency signal and second road mixed frequency signal are sent to microcontroller, so that the monolithic Machine determines the flow velocity of the flow according to the first via mixed frequency signal and second road mixed frequency signal.
2. the flowmeter based on mixing as described in claim 1, which is characterized in that the flowmeter based on mixing also wraps It includes:First amplifying circuit, first amplifying circuit are connected between the receiving transducer and the mixting circuit;
The receiving transducer is additionally operable to the third frequency waveform signal being sent to first amplifying circuit;
First amplifying circuit, for the third frequency waveform signal to be amplified, by the third frequency waveform of amplification Signal is sent to the mixting circuit.
3. the flowmeter based on mixing as claimed in claim 2, which is characterized in that the transmitting probe, being additionally operable to will be described First frequency waveform signal is converted to ultrasonic wave, and the ultrasonic wave is emitted to the pipeline, passes through the water in the pipeline It is streamed to the receiving transducer;
The receiving transducer is additionally operable to convert the waves into the third frequency waveform signal, and frequently by the third Rate waveform signal is sent to the mixting circuit.
4. the flowmeter based on mixing as claimed in claim 3, which is characterized in that the flowmeter based on mixing also wraps It includes:Second amplifying circuit, second amplifying circuit are connect with the mixting circuit;
Second amplifying circuit will for the first via mixed frequency signal and second road mixed frequency signal to be amplified The first via mixed frequency signal of amplification and the second road mixed frequency signal of amplification are sent to the microcontroller.
5. the flowmeter based on mixing as claimed in claim 4, which is characterized in that the mixting circuit includes first via mixing Device and No. second frequency mixer;
The first via frequency mixer, for the first frequency waveform signal to be mixed with the second frequency waveform signal First via mixed frequency signal is obtained, and the first via mixed frequency signal is sent to second amplifying circuit;
No. second frequency mixer, for the second frequency waveform signal to be mixed with the third frequency waveform signal The second road mixed frequency signal is obtained, and second road mixed frequency signal is sent to second amplifying circuit.
6. the flowmeter based on mixing as claimed in claim 5, which is characterized in that the flowmeter based on mixing also wraps It includes:Switching circuit, the switching circuit are connected between the transmitting probe and the receiving transducer;
The switching circuit, for switching over the transmitting probe and the receiving transducer.
7. the flowmeter based on mixing as claimed in claim 6, which is characterized in that the switching circuit includes:First switch And second switch, the first switch are connected between the transmitting probe and the waveform generator, described second opens Connection be connected between the receiving transducer and second amplifying circuit, also, the first switch also with the receiving transducer Connection, the second switch are also connect with the transmitting probe;
The first switch, for connecting the transmitting probe or the receiving transducer;
The second switch, for when the first switch connects the transmitting probe, the receiving transducer being connected, described When first switch connects the receiving transducer, the transmitting probe is connected.
8. the flowmeter based on mixing described in claim 7, which is characterized in that the waveform generator includes:Successively Conjointly signal generator, driving circuit and energy converter;
The signal generator, for generating first frequency waveform signal and second frequency waveform signal, by the first frequency Waveform signal and second frequency waveform signal are sent to the mixting circuit, and the first frequency waveform signal is also sent to The transmitting probe;
The driving circuit triggers the energy converter for passing through the first frequency waveform signal;
The first frequency waveform signal when for being triggered, is sent to the transmitting probe by the energy converter.
CN201721873009.9U 2017-12-27 2017-12-27 Flowmeter based on mixing Withdrawn - After Issue CN207798170U (en)

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CN201721873009.9U CN207798170U (en) 2017-12-27 2017-12-27 Flowmeter based on mixing

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Application Number Priority Date Filing Date Title
CN201721873009.9U CN207798170U (en) 2017-12-27 2017-12-27 Flowmeter based on mixing

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061678A (en) * 2022-01-10 2022-02-18 中国空气动力研究与发展中心设备设计与测试技术研究所 Digital driving method for Coriolis flowmeter
CN107941288B (en) * 2017-12-27 2023-07-21 武汉新烽光电股份有限公司 Flowmeter based on frequency mixing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107941288B (en) * 2017-12-27 2023-07-21 武汉新烽光电股份有限公司 Flowmeter based on frequency mixing
CN114061678A (en) * 2022-01-10 2022-02-18 中国空气动力研究与发展中心设备设计与测试技术研究所 Digital driving method for Coriolis flowmeter
CN114061678B (en) * 2022-01-10 2022-03-25 中国空气动力研究与发展中心设备设计与测试技术研究所 Digital driving method for Coriolis flowmeter

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