CN107747984B - Reference voltage modification method and device - Google Patents
Reference voltage modification method and device Download PDFInfo
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- CN107747984B CN107747984B CN201711027330.XA CN201711027330A CN107747984B CN 107747984 B CN107747984 B CN 107747984B CN 201711027330 A CN201711027330 A CN 201711027330A CN 107747984 B CN107747984 B CN 107747984B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/02—Compensating or correcting for variations in pressure, density or temperature
- G01F15/022—Compensating or correcting for variations in pressure, density or temperature using electrical means
Abstract
The present invention provides a kind of reference voltage modification method and device, is related to fluid metering technical field.The voltage that this method and device pass through acquisition current reference signal generation module, and calculating is compared in voltage collected under normal temperature according to current voltage and the signal generation module, it is poor in the crest voltage of first object collection point to obtain the two, and according to the crest voltage in first object collection point of the signal generation module except crest voltage difference amendment reference signal generation module.By the amendment of crest voltage, the measurement error that temperature change is brought can be corrected in real time, and then improves precision, practicability and the reliability of metering.
Description
Technical field
The present invention relates to fluid metering technical fields, in particular to a kind of reference voltage modification method and device.
Background technique
With the development of science and technology, requiring measuring technique higher and higher.For example, in (such as the combustion gas of water meter or other tables
Table) in, flow can be calculated by the revolution of impeller.In non-magnetic metering device field, it can be formed by oscillator damped oscillation
The signal of measurement.However oscillator is easy the wave for the measuring signal for being influenced by external environment (such as temperature), and being resulted in
Shape changes, and then influences the precision of measurement, causes the flow of measurement inaccurate.Therefore, how to provide one kind can solve it is above-mentioned
The technical issues of method and device of problem is to become those skilled in the art's urgent need to resolve.
Summary of the invention
In order to overcome the deficiencies in the prior art described above, the present invention provides a kind of reference voltage modification method and device, with
The measurement error that amendment temperature change is brought, improves the precision of metering, and then solve the above problems.
To achieve the goals above, technical solution provided by present pre-ferred embodiments is as follows:
For method, present pre-ferred embodiments provide a kind of reference voltage modification method, are applied to fluid meter,
Multiple signal generation modules, acquisition module corresponding with the signal generation module, and rotation are provided in the gauge table
Impeller in the gauge table is set；
The signal generation module is used to generate the signal of the voltage of damped oscillation, and the acquisition module is described for acquiring
The signal that signal generation module generates；The impeller includes permeability magnetic material area and non-magnet material area, when the signal generates mould
When block is located at the oscillating voltage that generates when the permeability magnetic material area and is less than the signal generation module and is located at the non-magnet material area
The oscillating voltage of generation；The described method includes:
Acquire the voltage of current multiple signal generation modules；
It is the smallest as reference signal generation module that voltage fluctuation is chosen from all signal generation modules；
The reference signal generation module for calculating the reference signal generation module and being obtained ahead of time is the next in normal temperature
Crest voltage in first object collection point is poor；
The signal generation module except the reference signal generation module is corrected described according to the crest voltage difference
The crest voltage of one target collection point.
In the preferred embodiment, the above method further include:
Signal generation module and signal generation module except the reference signal generation module is in the first object
The crest voltage of collection point counts the signal generation module when revised difference is not less than preset threshold, with
To the revolution of the impeller；
The revolution of the wheel rotation and the flow that fluid flows through are associated, to be obtained according to the revolution of the impeller
The flow of fluid.
In the preferred embodiment, above-mentioned that the smallest conduct of voltage fluctuation is chosen from all signal generation modules
The step of reference signal generation module, comprising:
Choose the period work that the signal generation module meets periodicity equal to predetermined period number during damped oscillation
For target period, the target period includes start time point；
Two collection points are chosen from the target period as two the second target collection points, close to the start time point
The second target collection point and the start time point the time difference be equal to the first preset duration, another second target collection point and institute
The time difference for stating start time point is equal to the second preset duration, and the amplitude of two first object collection points is different；
The voltage magnitude of two second target collection points is calculated, and chooses the electricity from all signal generation modules
Pressure amplitude value is maximum to be used as the reference signal generation module.
In the preferred embodiment, above-mentioned two second target collection point is respectively the target period
Peak point and valley point.
In the preferred embodiment, above-mentioned signal generation module is LC oscillator.
In the preferred embodiment, above-mentioned acquisition module is three, and uniformly distributed in the gauge table, institute
Stating permeability magnetic material area is fan section of the central angle less than 240 °, so that the impeller is during rotation, at least there is a letter
Number generation module is not located at the permeability magnetic material area.
For device, presently preferred embodiments of the present invention provides a kind of reference voltage correcting device, is applied to fluid metering
Table is provided with multiple signal generation modules, acquisition module corresponding with the signal generation module, Yi Jizhuan in the gauge table
The dynamic impeller being arranged in the gauge table；
The signal generation module is used to generate the signal of the voltage of damped oscillation, and the acquisition module is described for acquiring
The signal that signal generation module generates；The impeller includes permeability magnetic material area and non-magnet material area, when the signal generates mould
When block is located at the oscillating voltage that generates when the permeability magnetic material area and is less than the signal generation module and is located at the non-magnet material area
The oscillating voltage of generation；Described device includes:
Acquisition unit, for acquiring the voltage of current multiple signal generation modules；
It is the smallest as reference signal generation module to choose voltage fluctuation from all signal generation modules for selection unit；
Computing unit, the reference signal generation module for calculating the reference signal generation module Yu being obtained ahead of time exist
Crest voltage under normal temperature positioned at first object collection point is poor；
Amending unit is generated for correcting the signal except the reference signal generation module according to the crest voltage difference
Crest voltage of the module in the first object collection point.
In the preferred embodiment, above-mentioned apparatus further include:
Counting unit exists for the signal generation module except the reference signal generation module with signal generation module
The crest voltage of the first object collection point revised difference be not less than preset threshold when, to the signal generation module into
Row counts, to obtain the revolution of the impeller；
Associative cell, for the revolution of the wheel rotation and the flow that fluid flows through to be associated, according to
The revolution of impeller obtains the flow of fluid.
In the preferred embodiment, above-mentioned selection unit is also used to:
Choose the period work that the signal generation module meets periodicity equal to predetermined period number during damped oscillation
For target period, the target period includes start time point；
Two collection points are chosen from the target period as two the second target collection points, close to the start time point
The second target collection point and the start time point the time difference be equal to the first preset duration, another second target collection point and institute
The time difference for stating start time point is equal to the second preset duration, and the amplitude of two first object collection points is different；
The voltage magnitude of two second target collection points is calculated, and chooses the electricity from all signal generation modules
Pressure amplitude value is maximum to be used as the reference signal generation module.
In the preferred embodiment, above-mentioned two second target collection point is respectively the target period
Peak point and valley point.
In terms of existing technologies, reference voltage modification method and device provided by the invention at least have beneficial below
Effect: this method and device pass through the voltage for acquiring current reference signal generation module, and according to current voltage and the signal
Calculating is compared in generation module voltage collected under normal temperature, both to obtain the peak value in first object collection point
Voltage difference, and acquiring in first object for the signal generation module except reference signal generation module is corrected according to crest voltage difference
The crest voltage of point.By the amendment of crest voltage, the measurement error that temperature change is brought can be corrected in real time, improves metering
Precision.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, present pre-ferred embodiments are cited below particularly,
And cooperate appended attached drawing, it is described in detail below.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described.It should be appreciated that the following drawings illustrates only certain embodiments of the present invention, therefore it is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the block diagram for the gauge table that present pre-ferred embodiments provide.
Fig. 2 be impeller in the gauge table that provides of present pre-ferred embodiments, signal generation module, acquisition module structure show
It is intended to.
Fig. 3 is the voltage oscillogram of the signal generation module for each acquisition module acquisition that present pre-ferred embodiments provide.
Fig. 4 is the partial enlargement diagram at the position I in Fig. 3.
Fig. 5 is one of the flow diagram for the reference voltage modification method that present pre-ferred embodiments provide.
Fig. 6 is the two of the flow diagram for the reference voltage modification method that present pre-ferred embodiments provide.
Fig. 7 is one of the block diagram for the reference voltage correcting device that present pre-ferred embodiments provide.
Fig. 8 is the two of the block diagram for the reference voltage correcting device that present pre-ferred embodiments provide.
Icon: 10- gauge table；11- processing module；12- memory module；13- impeller；131- permeability magnetic material area；132- is non-
Permeability magnetic material area；14- acquisition module；15- signal generation module；100- reference voltage correcting device；110- acquisition unit；120-
Selection unit；130- computing unit；140- amending unit；150- counting unit；160- associative cell.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is logical
The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
With reference to the accompanying drawing, it elaborates to some embodiments of the present invention.In the absence of conflict, following
Feature in embodiment and embodiment can be combined with each other.
First embodiment
Fig. 1 is please referred to, is the block diagram for the gauge table 10 that present pre-ferred embodiments provide.In the embodiment of the present invention
In, the gauge table 10 can be used for substance of the forms such as metering liquid, gas, such as water measurement amount, gas consumption etc..It should
Gauge table 10 may include that processing module 11, memory module 12, acquisition module 14, signal generation module 15 and reference voltage are repaired
Equipment 100.The processing module 11, memory module 12, acquisition module 14, signal generation module 15 and reference voltage amendment
It is directly or indirectly electrically connected between each element of device 100, to realize the transmission or interaction of data.For example, these elements
It can be realized and be electrically connected by one or more communication bus or signal wire between each other.
Wherein, the processing module 11 can be a kind of processor, the IC chip of the processing capacity with signal.
The processor can be general processor, including central processing unit, network processing unit etc..Wherein, general processor can be micro-
Processor or the processor are also possible to any conventional processor etc..
The memory module 12 can be the memory for storing voltage data collected.The memory can be,
But it is not limited to random access memory, read-only memory, programmable read only memory, Erasable Programmable Read Only Memory EPROM, electricity
Erasable Programmable Read Only Memory EPROM etc..In the present embodiment, the memory can also store program, the processing module 11
After receiving and executing instruction, described program can be correspondingly executed.
Further, the reference voltage correcting device 100 can be with software or firmware (firmware) including at least one
Form be stored in the memory module 12.The processing module 11 is used to execute holding of storing in the memory module 12
Row module, such as software function module included by reference voltage correcting device 100 and computer program etc..
Impeller 13, signal generation module 15, acquisition in the gauge table 10 provided referring to figure 2. for present pre-ferred embodiments
The structural schematic diagram of module 14.In the present embodiment, multiple signal generation modules 15 and the signal are provided in gauge table 10
The corresponding acquisition module 14 of generation module 15 and the impeller 13 being arranged in the gauge table 10.Signal generation module 15 is used for
The signal of the voltage of damped oscillation is generated, acquisition module 14 is used to acquire the signal that the signal generation module 15 generates；Impeller
13 include permeability magnetic material area 131 and non-magnet material area 132, when the signal generation module 15 is located at the permeability magnetic material area
The oscillating voltage generated when 131 is less than the signal generation module 15 and is located at the oscillation electricity generated when the non-magnet material area 132
Pressure.
Further, signal generation module 15 can be LC oscillator.The one end at the inductance position of the oscillator and impeller
13 is corresponding, but does not contact with impeller 13.It can be regarded as oscillator to be fixed in gauge table 10, it will not be along with fluid
It flows and is moved relative to the shell of gauge table 10, and be located above or below impeller 13, but do not contacted with impeller 13.Acquire mould
Block 14 can be the voltmeter of the damped oscillation voltage for acquiring oscillator generation.
In the present embodiment, impeller 13 can be rotated along with the flowing of fluid.The permeability magnetic material area 131 of impeller 13 is by leading
Magnetic material is formed, permeability magnetic material may be, but not limited to, iron, mild steel, iron aluminium, iron silicon, ferrocobalt, ferrite, nickel, cobalt with
And permalloy etc., wherein the dilval of the permalloy i.e. nickel content 30%~90%.Impeller 13 it is non-magnetic
It goes to be formed by non-magnet material, such as plastics, ceramics etc..
Signal generation module 15 is in 13 rotation process of impeller, when signal generation module 15 is located at permeability magnetic material area 131,
The magnetic field energy that oscillator generates is absorbed by permeability magnetic material area 131, and decaying is faster.It therefore, can be by detecting signal generation module
The variation of 15 voltages judges whether there is the process of permeability magnetic material area 131, and then is counted, than passing through if any permeability magnetic material area 131
It crosses, then counts the revolution once to rotate as impeller 13.
Referring once again to Fig. 2, the central angle in permeability magnetic material area 131 is ∠ A, and the central angle in non-magnet material area 132 is ∠
B.The number of signal generation module 15 can be configured according to the actual situation, for example, signal generation module 15 can be three.Three
Signal generation module 15 can be uniformly distributed in the gauge table 10, and corresponding permeability magnetic material area 131 is central angle less than 240 °
At least there is a signal and generate mould in the fan section of (namely ∠ A is less than 240 °) so that the impeller 13 is during rotation
Block 15 is not located at the permeability magnetic material area 131.In addition, multiple signal generation modules 15, which are arranged, also can be improved the essence of 13 revolution of impeller
Degree.For example, N number of signal generation module 15 is arranged, then the accuracy of reading of corresponding 13 revolution of impeller is up to 1/N.Specifically, than
Such as, three signal generation modules 15 are set, the accuracy of reading of revolution can be made to reach 1/3 turn.
It is worth noting that a kind of schematic diagram of Fig. 2 only for ease of understanding, the signal generation module 15 of the gauge table 10 is also
It can be different from shape and structure shown in Fig. 2, for example signal generation module 15 can carry out insulated enclosure by plastic packaging, avoid shape
It is directly contacted at the coil of inductance with fluid.
Incorporated by reference to referring to Fig. 3 and Fig. 4, wherein Fig. 3 is that each acquisition module 14 that present pre-ferred embodiments provide acquires
The voltage oscillogram of signal generation module 15, Fig. 4 are the partial enlargement diagram at the position I in Fig. 3.Optionally, three signals are raw
Model at module 15 is identical, to the big voltage such as three signal generation modules 15 while application, to form damped oscillation, and root
It is supplemented according to actual conditions interval and applies voltage, decayed to avoid the voltage value for starting to apply and be unfavorable for calculating crest voltage
Difference.It, which supplements to apply alive foundation and can be, was also possible to be mended according to the voltage after decaying at interval of the isometric time
It fills.
In Fig. 3, the corresponding voltage waveform of dotted line is damping vibration when signal generation module 15 is located at permeability magnetic material area 131
The voltage waveform swung, the corresponding voltage waveform of solid line are the electricity of damped oscillation when generation module is located at non-magnet material area 132
Corrugating., can be poor by comparing the corresponding crest voltage of two kinds of waveforms when the turnning circle (revolution) to impeller 13 counts, when
When crest voltage difference is more than a certain threshold value, just counted.The threshold value can be configured according to the actual conditions of crest voltage difference,
It is not specifically limited herein.
It is worth noting that acquisition module 14 can be corresponded with signal generation module 15, that is, an acquisition mould
Block 14 is used to acquire the voltage of a signal generation module 15.In other embodiments, an acquisition module 14 can acquire
The voltage of multiple signal generation modules 15.If the waveform diagram that multiple signal generation modules 15 are formed by voltage is integrated,
Waveform diagram as shown in Figure 3 can be obtained.When 15 model of signal generation module is identical, the wave of multiple formation of signal generation modules 15
Shape figure is two kinds, it is a kind of for positioned at permeability magnetic material area 131 when waveform, another kind for positioned at non-magnet material area 132 waveform,
The waveform that namely there is a situation where that multiple signal generation modules 15 are formed is identical.
It is understood that structure shown in FIG. 1 is only a kind of structural schematic diagram of reference voltage correcting device 100, institute
State reference voltage correcting device 100 can also include than more or fewer components shown in Fig. 1.Each component shown in FIG. 1
It can be realized using hardware, software, or its combination.
Second embodiment
It referring to figure 5., is one of the flow diagram for the reference voltage modification method that present pre-ferred embodiments provide.In
In the present embodiment, reference voltage modification method can be applied to above-mentioned gauge table 10.This method generates mould by revise signal
The measuring accuracy of gauge table 10 can be improved in the variation in voltage that block 15 is brought by temperature change, can solve to make to count because of temperature change
The inaccurate problem of the metering of scale 10.
The detailed process and step of reference voltage modification method shown in Fig. 5 are described in detail below.In this reality
It applies in example, the reference voltage modification method may comprise steps of:
Step S210 acquires the voltage of current multiple signal generation modules 15.
Optionally, multiple signal generation modules 15 can be above-mentioned LC oscillator, be used to form damped oscillation.It is appreciated that
Ground, a signal generation module 15 are matched with acquisition module 14 to form a sense channel.Signal generation module 15 is having
When permeability magnetic material area 131 with non-magnet material area 132 by passing through, the former decays faster at corresponding voltage waveform, that is, right
The oscillating voltage answered is less than the oscillating voltage of the latter.
It is the smallest as reference signal generation module to choose voltage fluctuation from all signal generation modules 15 by step S220
15。
In the present embodiment, voltage fluctuation it is the smallest just for signal generation module 15 be located at non-magnetic area when, be formed by
Voltage signal.Inventor tests to obtain by a large amount of high/low temperature: when temperature change, what the oscillator of multiple sense channels was formed
The variation tendency of voltage value is consistent, is even located at permeability magnetic material area 131 in the presence of the signal generation module 15 of a sense channel,
This variation is also almost consistent.The variation that can be regarded as the sense channel voltage is only affected by temperature, which generates mould
Voltage waveform drift value after block 15 is affected by temperature can be adapted on other signal generation modules 15.
Further, step S220 may also include other sub-steps.It is being damped for example, choosing the signal generation module 15
Meet period of the periodicity equal to predetermined period number in oscillatory process as target period, the target period includes initial time
Point；Two collection points are chosen from the target period as two the second target collection points, close to the of the start time point
The time difference of two target collection points and the start time point is equal to the first preset duration, another second target collection point with described
The time difference at time point beginning is equal to the second preset duration, and the amplitude of two first object collection points is different；Calculate two described second
The voltage magnitude of target collection point, and the voltage magnitude maximum conduct ginseng is chosen from all signal generation modules 15
Examine signal generation module 15.
It is understandably that the predetermined period number can be configured according to the actual situation, is not especially limited here.Two
Second target collection point is corresponding in target period, and the signal because being located at permeability magnetic material area 131 and non-magnet material area 132 generates
The voltage waveform attenuation degree of module 15 is different, and the corresponding voltage magnitude two the second target collection points is also just different.And believe
The voltage magnitude of number generation module 15 in permeability magnetic material area 131 is less than the voltage magnitude in non-magnet material area 132.That is electric
It presses signal generation module 15 corresponding to amplitude maximum to be just located at non-magnet material area 132, also just can be used as reference signal generation
Module 15.
If the maximum signal generation module 15 of voltage magnitude has multiple, it can be used as reference signal generation module 15.
Optionally, second target collection point can be respectively the peak point and valley point of target period, be formed
Voltage magnitude it is larger, convenient for compare calculate.
Step S230 calculates the reference signal generation module 15 and exists with the reference signal generation module 15 being obtained ahead of time
Crest voltage under normal temperature positioned at first object collection point is poor.
In the present embodiment, the normal temperature can be configured according to the actual situation.For example, may be selected at 25 DEG C
When, acquire the corresponding voltage waveform of signal generation module 15.And first object collection point can be at 25 DEG C, reference signal be raw
At other signal generation modules 15 except module 15 and the maximum place of the difference of the crest voltage between reference signal generation module 15
Corresponding collection point.Certainly, in other real-time modes, normal temperature and first object collection point can also be other differences
With above-mentioned embodiment, which is not described herein again.
Step S240 corrects the signal except the reference signal generation module 15 according to the crest voltage difference and generates mould
Crest voltage of the block 15 in the first object collection point.
In this embodiment, the conclusion based on above-mentioned experiment can will correct current reference signal according to the crest voltage difference
The voltage signal of generation module 15 and the voltage signal of the signal generation module 15 except reference signal generation module 15.Into
And make the signal generation module 15 except revised reference signal generation module 15 with reference signal generation module 15 first
The crest voltage difference of target collection point is that crest voltage corresponding under normal temperature is poor, also just solves signal generation module 15
The problem for making fluid metering inaccurate because of temperature bring voltage drift.
3rd embodiment
Fig. 6 is please referred to, is the two of the flow diagram for the reference voltage modification method that present pre-ferred embodiments provide.This
The reference voltage modification method that embodiment provides can also include step S250 and step S260.
Step S250, signal generation module 15 except reference signal generation module 15 and signal generation module 15 are the
The crest voltage of one target collection point counts the signal generation module 15 when revised difference is not less than preset threshold
Number, to obtain the revolution of impeller 13.
In the present embodiment, corresponding difference when the preset threshold can be maximum for crest voltage difference.Namely
When one target collection point, which is equal to or more than the preset threshold, is just counted.For example, if to same letter
Number generation module 15 is counted twice, also just also just refers to that impeller 13 at least has rotated a circle, but be no more than two circles.
The revolution that the impeller 13 rotates and the flow that fluid flows through are associated, according to the leaf by step S260
The revolution of wheel 13 obtains the flow of fluid.
In the present embodiment, it by needing the flow flowed through to be associated by revolution and with the revolution is formed, can be obtained every
Fluid flow corresponding to one revolution, and then by the specific number of fluid flow, service condition is checked convenient for user.
Fourth embodiment
Please refer to Fig. 7, be present pre-ferred embodiments provide reference voltage correcting device 100 block diagram it
One.In this embodiment, reference voltage correcting device 100 is modified for the voltage drift according to caused by temperature change, can be mentioned
High fluid metering precision.The apparatus may include acquisition unit 110, selection unit 120, computing unit 130 and amendment are single
Member 140.
Acquisition unit 110, for acquiring the voltage of current multiple signal generation modules 15.Specifically, acquisition unit
110 can be used for executing step S210 shown in fig. 5, and specific operation content is referred to the detailed description to step S210.
It is understood that the acquisition unit 110 can realize the corresponding software function part of acquisition movement for acquisition module 14.
It is the smallest as reference signal generation to choose voltage fluctuation from all signal generation modules 15 for selection unit 120
Module 15.Selection unit 120 can be used for executing step S220 shown in fig. 5, and specific operation content is referred to step
The detailed description of S220.
Further, selection unit 120 can also be used to choose the signal generation module 15 during damped oscillation completely
Sufficient periodicity is equal to the period of predetermined period number as target period, and the target period includes start time point；From the mesh
Two collection points are chosen in the mark period as two the second target collection points, close to the second target collection point of the start time point
Be equal to the first preset duration with time difference of the start time point, another second target collection point and the start time point when
Difference is equal to the second preset duration, and the amplitude of two first object collection points is different；Calculate two second target collection points
Voltage magnitude, and choose the voltage magnitude maximum conduct reference signal from all signal generation modules 15 and generate mould
Block 15, which is not described herein again.
Computing unit 130 is generated for calculating the reference signal generation module 15 with the reference signal being obtained ahead of time
Crest voltage of the module 15 under normal temperature positioned at first object collection point is poor.Computing unit 130 can be used for executing Fig. 5 institute
The step S230 shown, specific operation content are referred to the detailed description to step S230.
Amending unit 140, for correcting the letter except the reference signal generation module 15 according to the crest voltage difference
The crest voltage of number generation module 15 in the first object collection point.Amending unit 140 can be used for executing step shown in fig. 5
Rapid S240, specific operation content are referred to the detailed description to step S240.
5th embodiment
Please refer to Fig. 8, be present pre-ferred embodiments provide reference voltage correcting device 100 block diagram it
Two.In the present embodiment, reference voltage correcting device 100 can also include counting unit 150 and associative cell 160.
Counting unit 150, for working as signal generation module 15 and signal life except the reference signal generation module 15
At module 15 the first object collection point crest voltage revised difference be not less than preset threshold when, to the signal
Generation module 15 is counted, to obtain the revolution of the impeller 13.Counting unit 150 can be used for executing step shown in fig. 6
Rapid S250, specific operation content are referred to the detailed description to step S250.
Associative cell 160, the revolution for rotating the impeller 13 is associated with the flow that fluid flows through, with basis
The revolution of the impeller 13 obtains the flow of fluid.Associative cell 160 can be used for executing step S260 shown in fig. 6, specifically
Operation content be referred to the detailed description to step S260, which is not described herein again.
In conclusion the present invention provides a kind of reference voltage modification method and device.This method and device are worked as by acquisition
The voltage of preceding reference signal generation module, and it is collected under normal temperature according to current voltage and the signal generation module
Calculating is compared in voltage, poor in the crest voltage of first object collection point to obtain the two, and is corrected according to crest voltage difference
The crest voltage in first object collection point of signal generation module except reference signal generation module.Pass through crest voltage
Amendment, can correct the measurement error that temperature change is brought in real time, be influenced by temperature the metering precision of gauge table not, improve
Meter accuracy, practicability and reliability.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of reference voltage modification method is applied to fluid meter, which is characterized in that be provided in the gauge table multiple
Signal generation module, acquisition module corresponding with the signal generation module, and the leaf being rotatably arranged in the gauge table
Wheel；
The signal generation module is used to generate the signal of the voltage of damped oscillation, and the acquisition module is for acquiring the signal
The signal that generation module generates；The impeller includes permeability magnetic material area and non-magnet material area, and the permeability magnetic material area is the center of circle
At least there is a signal generation module and be not located at institute in fan section of the angle less than 240 ° so that the impeller is during rotation
Permeability magnetic material area is stated, the oscillating voltage generated when the signal generation module is located at the permeability magnetic material area is raw less than the signal
The oscillating voltage generated when being located at the non-magnet material area at module；The described method includes:
Acquire the voltage of current multiple signal generation modules；
It is the smallest as reference signal generation module that voltage fluctuation is chosen from all signal generation modules；
It calculates the reference signal generation module and is located at the under normal temperature with the reference signal generation module that is obtained ahead of time
The crest voltage of one target collection point is poor；
The signal generation module except the reference signal generation module is corrected in first mesh according to the crest voltage difference
Mark the crest voltage of collection point.
2. the method according to claim 1, wherein the method also includes:
Signal generation module and signal generation module except the reference signal generation module are acquired in the first object
The crest voltage of point counts the signal generation module, when revised difference is not less than preset threshold to obtain
State the revolution of impeller；
The revolution of the wheel rotation and the flow that fluid flows through are associated, to obtain fluid according to the revolution of the impeller
Flow.
3. the method according to claim 1, wherein described choose voltage fluctuation from all signal generation modules
The smallest the step of being used as reference signal generation module, comprising:
It chooses the signal generation module and meets period of the periodicity equal to predetermined period number during damped oscillation as mesh
The period is marked, the target period includes start time point；
Two collection points are chosen from the target period as two the second target collection points, close to the of the start time point
The time difference of two target collection points and the start time point is equal to the first preset duration, another second target collection point with described
The time difference at time point beginning is equal to the second preset duration, and the amplitude of two first object collection points is different；
The voltage magnitude of two second target collection points is calculated, and chooses the voltage amplitude from all signal generation modules
It is worth maximum as the reference signal generation module.
4. according to the method described in claim 3, it is characterized in that, described two second target collection points are respectively described
The peak point and valley point of target period.
5. the method according to claim 1, wherein the signal generation module is LC oscillator.
6. method described in any one of -5 according to claim 1, which is characterized in that the signal generation module is three,
And it is uniformly distributed in the gauge table.
7. a kind of reference voltage correcting device is applied to fluid meter, which is characterized in that be provided in the gauge table multiple
Signal generation module, acquisition module corresponding with the signal generation module, and the leaf being rotatably arranged in the gauge table
Wheel；
The signal generation module is used to generate the signal of the voltage of damped oscillation, and the acquisition module is for acquiring the signal
The signal that generation module generates；The impeller includes permeability magnetic material area and non-magnet material area, and the permeability magnetic material area is the center of circle
At least there is a signal generation module and be not located at institute in fan section of the angle less than 240 ° so that the impeller is during rotation
Permeability magnetic material area is stated, the oscillating voltage generated when the signal generation module is located at the permeability magnetic material area is raw less than the signal
The oscillating voltage generated when being located at the non-magnet material area at module；Described device includes:
Acquisition unit, for acquiring the voltage of current multiple signal generation modules；
It is the smallest as reference signal generation module to choose voltage fluctuation from all signal generation modules for selection unit；
Computing unit, the reference signal generation module for calculating the reference signal generation module and being obtained ahead of time is in standard
At a temperature of be located at first object collection point crest voltage it is poor；
Amending unit, for correcting the signal generation module except the reference signal generation module according to the crest voltage difference
Crest voltage in the first object collection point.
8. device according to claim 7, which is characterized in that described device further include:
Counting unit, for the signal generation module except the reference signal generation module with signal generation module described
The crest voltage of first object collection point counts the signal generation module when revised difference is not less than preset threshold
Number, to obtain the revolution of the impeller；
Associative cell, for the revolution of the wheel rotation and the flow that fluid flows through to be associated, according to the impeller
Revolution obtain the flow of fluid.
9. device according to claim 7 or 8, which is characterized in that the selection unit is also used to:
It chooses the signal generation module and meets period of the periodicity equal to predetermined period number during damped oscillation as mesh
The period is marked, the target period includes start time point；
Two collection points are chosen from the target period as two the second target collection points, close to the of the start time point
The time difference of two target collection points and the start time point is equal to the first preset duration, another second target collection point with described
The time difference at time point beginning is equal to the second preset duration, and the amplitude of two first object collection points is different；
The voltage magnitude of two second target collection points is calculated, and chooses the voltage amplitude from all signal generation modules
It is worth maximum as the reference signal generation module.
10. device according to claim 9, which is characterized in that described two second target collection points are respectively institute
State the peak point and valley point of target period.
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