CN104596589B - The web type flowmeter and its detection method of detectable flow direction - Google Patents
The web type flowmeter and its detection method of detectable flow direction Download PDFInfo
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- CN104596589B CN104596589B CN201510015766.1A CN201510015766A CN104596589B CN 104596589 B CN104596589 B CN 104596589B CN 201510015766 A CN201510015766 A CN 201510015766A CN 104596589 B CN104596589 B CN 104596589B
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Abstract
The invention discloses a kind of web type flowmeter of detectable flow direction, including body and arithmetic element, sensing unit and rotary components in the body are set.Rotary components, which correspond to groups of sense cells and are located at body, to be stretched into the part of pipeline, rotary components include rotating shaft and spaced plural induction blade, induction blade is respectively equipped with the metalwork with different dielectric coefficients, and metalwork sorts according to dielectric coefficient and is sequentially arranged in induction blade；Wherein, the rotation of fluid driven induction blade and sensing is produced to sensing unit and produces sensing signal, sensing unit is by sensing signal transmission to arithmetic element；Thereby, the flow direction of fluid presents and can interpolate that as forward flow or reverse flow through the mode of sensing signal intensity progressively increasing or decreasing.
Description
Technical field
The present invention relates to flow detection technical field, more particularly to a kind of web type flowmeter of detectable flow direction and its inspection
Survey method.
Background technology
Web type flowmeter (Paddlewheel Flowmeter) is a kind of flow sensor, and it is mainly comprising rotor, axle
Hold, rotating shaft, magnet, main body, the group such as the Hall sensor (Hall Effect Sensor) for being embedded in main body and sensing circuit plate
Part；Wherein, for rotor built with magnet, induced signal is to produce excitatory by Hall sensor and magnet and produce.When rotor by
Fluid driven and when rotating, the magnet imbedded in rotor can be rotated and then, and can induce pulse when passing through Hall sensor
Signal, and then try to achieve fluid flow.
However, the rotor of traditional web type flowmeter must be embedded to magnetic material, when testing liquid is high temperature can because
Occupy gift temperature effect (Curie Temperature Effect) so that magnetic material easily causes sensing to produce because being unmagnetized
Misjudgement.Furthermore traditional web type flowmeter can only detect fluid flow merely, but fluid flow direction can not be detected, reduce use
On convenience.In addition, when rotor dirt deposits, this anomaly can not be also detected, time-based maintenance is made to this anomaly,
Therefore the error measured easily occurs.
In view of this, it is necessary to which existing web type flowmeter is improved.
The content of the invention
It is an object of the invention to provide a kind of web type flowmeter of detectable flow direction, to realize to fluid in pipeline
Flow direction is judged.
In order to realize the above object the present invention provides a kind of web type flowmeter of detectable flow direction, for measuring a pipe
The flow and flow direction of fluid in road, the web type flowmeter include：
The pipeline is stretched into body, the side and part for being arranged on the pipeline；
Arithmetic element, it is arranged in the body；
Sensing unit, it is arranged in the body and is electrically connected with the arithmetic element；And
Rotary components, it is arranged on the body and stretches into the part of the pipeline, and it is corresponding with the sensing unit；Institute
State rotary components to include rotating shaft and be disposed on described turn of axial a plurality of induction blades, set respectively in each induction blade
There is metalwork, each metalwork has different dielectric coefficients, and each metalwork sorts according to dielectric coefficient and is sequentially arranged each
In induction blade；
Wherein, the rolling tangential direction of induction blade ora terminalis is the flow direction of fluid, when fluid flows through in the pipeline
During induction blade, induction blade can be driven to rotate, the sensing unit is sensed that those have the metal of different dielectric coefficient
Part and produce intensity and progressively a plurality of sensing signals of increasing or decreasing and be transferred to the arithmetic element and carry out computing, thereby sentence
The fluid that breaks is forward flow or reverse flow.
In one embodiment of the invention, the material of the body for ceramics, can heat-proof macromolecule material, composite
Or any of metal.
In one embodiment of the invention, the relatively described rotating shaft of a plurality of induction blades is symmetric setting.
In one embodiment of the invention, the metalwork be embedded corresponding induction blade surface and with the stream
Body contacts.
In one embodiment of the invention, the sensing unit is an oscillating circuit, and the sensing unit includes inductive bank
Part and the capacitance component in parallel with the Inductive component.
In one embodiment of the invention, the web type flowmeter further includes a signal conversion unit, the signal
Converting unit is electrically connected with the sensing unit and the arithmetic element, and the sensing signal is turned by the signal conversion unit
The arithmetic element is resent to after being changed to cycle ripple signal, and is believed by the computing of the arithmetic element to be converted into flow
Number.
In one embodiment of the invention, the web type flowmeter further includes a voltage regulation unit, the voltage regulation unit
The arithmetic element and the signal conversion unit is electrically connected, the voltage regulation unit exports a steady dc voltage source simultaneously
It is supplied to the arithmetic element and the signal conversion unit.
In one embodiment of the invention, the web type flowmeter further comprising reception external information or provides information
A coffret unit of computing is carried out to the arithmetic element, the coffret unit is electrically connected with the arithmetic element, and the fortune
Calculate unary system and the sensing signal is sent to outside through the coffret unit.
Meanwhile the present invention also provides a kind of detection method of the web type flowmeter of detectable flow direction, for above-mentioned
Whether the induction blade of the web type flowmeter of detectable flow direction, which occurs sensing deterioration, is detected, and is comprised the following steps：
A) default value is determined in arithmetic element；
B) receiving intensity changes a plurality of sensing signals of progressively increasing or decreasing；
C) it is compared using the intensity of those sensing signals, captures one and measure most characteristic value；And
D) arithmetic element carries out the judgement of degradation using the measurement most characteristic value and the default value.
10th, the web type flowmeter of detectable flow direction as claimed in claim 9, it is characterised in that step a) also includes
A default gap value is determined, the detection method further comprises an a step e) and step f), wherein, step e) should to compare
Measure and most characteristic value and the default value and then draw a measurement gap value, step f) is compares the measurement gap value and this is default
Gap value deteriorates so as to judge to sense.
In one embodiment of the invention, in addition to step e '), step e ') to obtain multiple measurement most features
Be worth and sort, by those measurement most characteristic values be compared with the default value, wherein those measurement most characteristic values be equal to or
During less than the default value, then it is judged as sensing deterioration.
In one embodiment of the invention, the default value and the measurement most characteristic value have a signal waveform respectively,
Step d), which is included, to be calculated integral area to the signal waveform of the measurement most characteristic value and the default value respectively and draws an area
Difference value, the area discrepancy value are equal to or more than a standard deviation gap value so as to judge sensing deterioration.
The present invention is allowed to compared with prior art, have the following advantages that and actively imitate due to using above technical scheme
Fruit：
1) due to the metalwork and nonmagnetic substance of web type flowmeter of the invention, therefore metalwork will not be by high temperature
And influence measurement, therefore can be applicable to measure high temperature fluid flow when can still keep measure accuracy；
2) the web type flowmeter of detectable flow direction of the invention is that different dielectric coefficient is provided with each induction blade
Metalwork, and sorted according to dielectric coefficient and each metalwork be sequentially arranged in each induction blade, because sensing signal can be right
Answer the metalwork of different dielectric coefficient and produce different induced signal intensity levels, therefore, the flow direction of fluid is with regard to that can pass through
The mode of sensing signal intensity progressively increasing or decreasing presents and is judged as forward flow or reverse flow, when increase uses just
Profit.
Brief description of the drawings
Fig. 1 is the perspective exploded view of the web type flowmeter of the detectable flow direction of the present invention；
Fig. 2 is the assembled sectional view of the web type flowmeter of the detectable flow direction of the present invention；
Fig. 3 is the circuit box schematic diagram of the web type flowmeter of the detectable flow direction of the present invention；
Fig. 4 is the sensing signal schematic diagram of the web type flowmeter of the detectable flow direction of the present invention；
Fig. 5 is that the another of web type flowmeter of the detectable flow direction of the present invention uses schematic diagram；
Fig. 6 is another sensing signal schematic diagram of the web type flowmeter of the detectable flow direction of the present invention；
Fig. 7 is the sensing signal attenuation curve schematic diagram of the web type flowmeter of the detectable flow direction of the present invention；
Fig. 8 is the second embodiment of the induction blade of the present invention；
Fig. 9 is the 3rd embodiment of the induction blade of the present invention.
Symbol description：
1- web type flowmeters
2- pipelines
3- deposits foreign object
10- bodies
The accommodation spaces of 101- first
The accommodation spaces of 102- second
20- arithmetic elements
21- circuit boards
22- signal conversion units
23- voltage regulation units
24- coffret units
30- sensing units
31- Inductive components
32- capacitance components
40- rotary components
41- rotating shafts
42nd, 42a, 42b- induction blade
43rd, 43a, 43b- metalwork
50th, 50 '-sensing signal
500- default values
500 '-measure most characteristic value
501- standard minimums
501 '-measure minimum
504- standard maximum
504 '-measure maximum
D- presets gap value
D '-measurement gap value
A '-area discrepancy value
Embodiment
Below in conjunction with web type flowmeter of the drawings and specific embodiments to detectable flow direction proposed by the present invention and its inspection
Survey method is described in further detail.According to following explanation and claims, advantages and features of the invention will become apparent from.Need
Illustrate, accompanying drawing uses using very simplified form and non-accurately ratio, is only used for conveniently, lucidly aiding in saying
The purpose of the bright embodiment of the present invention.
Fig. 1 to Fig. 3 is refer to, it is respectively the stereo decomposing signal of the web type flowmeter of the detectable flow direction of the present invention
Figure, assembled sectional view and circuit box schematic diagram.The present invention provides a kind of web type flowmeter 1 of detectable flow direction, and it is used for
Measure the flow and flow direction of fluid in a pipeline 2.The web type flowmeter 1 includes a body 10, an arithmetic element 20, one senses
The rotary components 40 of unit 30 and one.The body 10 is arranged on the side of the pipeline 2 and part and stretches into the pipeline 2.The arithmetic element
20 and the sensing unit 30 be all disposed within the body 10.The rotary components 40 are arranged on the body 10, for contacting the pipeline 2
Interior fluid.
In one embodiment of this invention, the body 10 is a shell block and one first accommodation space set with separation
101 and one second accommodation space 102.Also, the body 10 can by ceramics, can heat-proof macromolecule material, composite or metal
Any one made by, but be not limited system.In the present embodiment, second accommodation space 102 is formed the one of the body 10
End, 40 groups of the rotary components are located in second accommodation space 102.When 10 groups of the body is located at the pipeline 2, this is second accommodating
Space 102 is connected with the inside of the pipeline 2.
The arithmetic element 20 and the sensing unit 30 are arranged in first accommodation space 101, and the electricity of sensing unit 30
Property connects the arithmetic element 20.In the present embodiment, the arithmetic element 20 is provided on a circuit board 21.In addition, the sensing list
Member 30 is arranged to an oscillating circuit, and the sensing unit 30 includes an Inductive component 31 and an electric capacity in parallel with the Inductive component 31
Component 32.
The rotary components 40 include a rotating shaft 41 and the plural induction blade 42 being disposed on around the rotating shaft 41.Preferably
Ground, those induction blades 42 are symmetric setting with respect to the rotating shaft 41, to provide stable and smoothly rotate.It is in addition, each
Induction blade 42 is provided with a metalwork 43；And those metalworks 43 have different dielectric coefficients, and those metalworks 43
Sort and be sequentially arranged in those induction blades 42 according to those dielectric coefficients.It is preferred that the rotary components 40 are to that should feel
Survey unit 30 and group is located at the body 10 and stretched into the part of the pipeline 2.
In the present embodiment, metalwork 43 be it is embedded corresponding in induction blade 42 and and fluid isolation, it is actual when implementing,
The metalwork 43 can be also embedded to be contacted on the corresponding surface of induction blade 42 with fluid.
As shown in Fig. 2 drive those induction blades 42 to rotate when the fluid in the pipeline 2 flows through the rotary components 40,
And sensing is produced to the sensing unit 30.The sensing unit 30 senses the metalwork 43 of each induction blade 42 and produces sensing letter
The sensing signal 50 is transferred to the arithmetic element 20 again and carries out computing by number 50 (refer to Fig. 4), the metalwork 43.Subsequently, should
Arithmetic element 20 can carry out flow direction judgement according to those sensing signals 50, and the judgement about flowing to will be described in detail later.
Fig. 3 is refer to, it can detect the circuit box schematic diagram of the web type flowmeter of flow direction for the present invention.In the present invention
An embodiment in, the web type flowmeter 1 further comprises that a signal conversion unit 22, a voltage regulation unit 23 and a transmission connect
Mouth unit 24.The signal conversion unit 22 is electrically connected with the arithmetic element 20 and the sensing unit 30, and those sensing signals 50 are saturating
Cross the signal conversion unit 22 oscillating impulse is converted into cycle ripple signal (such as square-wave signal) and be resent to the arithmetic element
20, and it is converted into flow signal through the computing of the arithmetic element 20.The computing list is electrically connected in the voltage regulation unit 23
Member 20 and the signal conversion unit 22.The voltage regulation unit 23 mainly one steady dc voltage source of output, and be supplied to this
Arithmetic element 20 and the signal conversion unit 22 are as power supply.The coffret unit 24 is electrically connected with the arithmetic element 20, should
Coffret unit 24 is transported from the known information of external reception (such as temperature, pressure or vibrations) to the arithmetic element 20
Calculate, or known signal (such as communicating delivery protocol) is provided.
It please continue reference picture 4, it can detect the sensing signal schematic diagram of the web type flowmeter of flow direction for the present invention.The present invention
Web type flowmeter 1 operate after, those induction blades 42 are produced rotation by the drive for fluid of passing through.Due to those metalworks
43 be to sort and be sequentially arranged in those induction blades 42 according to dielectric coefficient, therefore the arithmetic element 20 is according to each metalwork
Sensing signal 50 caused by 43 can be presented in a manner of gradually increasing (ascending order) or gradually reducing (descending).Accordingly, fluid
Flow direction be through those sensing signals 50 progressively increasing or decreasing mode present and can interpolate that as forward flow or
Reverse flow.For example, can be made when those 42 counterclockwise rotates of induction blade of fluid forces those sensing signals 50 with by
Step is incremented by (ascending order) mode and presented, then when those sensing signals 50 are presented in a manner of (descending) progressively to successively decrease, can deduce fluid
System promotes those induction blades 42 to be rotated clockwise, it follows that the flow direction of fluid.
In addition, the web type flowmeter 1 of the present invention is in addition to detecting fluid flow and flow direction, moreover it can be used to judges those senses
Answer the sensing degradation of blade 42.By knowing for sensing degradation, user can be by this sensing degradation conduct
The foundation of the induction blade 42 of the maintaining web type flowmeter 1.The explanation of the sensing degradation will be said in detail below
It is bright.
Fig. 5 and Fig. 6 is refer to, it is respectively that the another of the web type flowmeter of the present invention uses schematic diagram and sensing signal
Schematic diagram.The application field of the web type flowmeter 1 of the present invention is wide, such as in the industry such as pharmacy, food or running water, all can profit
The fluid flow in processing procedure is measured with web type flowmeter 1.Due to web type flowmeter 1 after long-term use, the rotary components
40 surface of induction blade 42 may deposit foreign object 3 (as shown in Figure 5), such as iron filings, hair, fiber.Foreign object deposition meeting pair
Sensing signal causes to decay, and this is so-called sensing degradation in the present invention.
When the surface of induction blade 42 deposits foreign object 3, sensing signal 50 ' caused by the web type flowmeter 1 can produce
Decay；As shown in fig. 6, it is the comparison of the sensing signal 50 ' and original sensing signal 50 that show decay.
The present invention also provides a kind of detection method of the web type flowmeter of detectable flow direction, and the detection method includes such as
Lower step：
Step a)：Arithmetic element 20 determines a default value (Threshold Value) 500 from sensing signal 50.The acquiescence
Value 500 is a standard extremum, such as a standard minimum 501 or a standard maximum 504.
Step b)：Receive the plural sensing signal 50 ' of the respectively Strength Changes of induction blade 42 progressively increasing or decreasing.
Step c)：It is compared using those sensing signals 50 ', captures one and measure most characteristic value 500 ', such as one measures
Minimum 501 ' or a measurement maximum 504 '.
Step d)：The arithmetic element 20 is carried out bad using this with the measurement most characteristic value 500 ' with the default value 500
The judgement of change degree.For example, work as the default value 500 in a) step and be set to standard maximum 504, the measurement in step c) is most
Has characteristic value 500 ' to measure maximum 504 '；Therefore, after comparing standard maximum 504 and measuring maximum 504 ', if amount
When survey maximum 504 ' is less than or equal to standard maximum 504, then it is judged as sensing deterioration, now must be to the wheeled flow of the web
The induction blade 42 of meter 1 carries out cleaning and maintenance operation, uses and keeps correct measurement.
Similarly, when the default value 500 in step a) is set to standard minimum 501, the measurement in step c) is most special
Value indicative 500 ' is standard minimum 501；Therefore, after comparing standard minimum 501 and measuring minimum 501 ', if measuring minimum
When value 501 ' is less than or equal to the standard minimum 501, then it is judged as sensing deterioration.It is, when those sensing signals 50 ' decline
It can learn after reducing to certain value and must carry out cleaning and maintenance operation to the induction blade 42 of the web type flowmeter 1.
In the present embodiment, the minimum value in those initial sensing signals 50 of the web type flowmeter 1 and maximum are
Default value 500 (comprising standard minimum 501 and standard maximum 504), the web type flowmeter 1 subsequently measure those
Sensing signal 50 ' is compared to carry out the judgement for sensing degradation respectively with initial sensing signal 50.
In addition it is noted that abovementioned steps a) also includes determining a default gap value D (not shown), the detection method
It is to compare the measurement most characteristic value 500 ' and the default value 500 to further comprise an a step e) and step f), step e)
And then a measurement gap value D ' is drawn, step f) is compares the measurement gap value D ' and the default gap value D, so as to judge to be
No sensing deterioration；That is, when measurement gap value D ' is equal to or more than the default gap value D, then it is judged as sensing deterioration.
Another sensing degradation for being noted that the present invention with the extremum of sensing signal 50,50 ' except being sentenced
It is disconnected outer, also carried out using the mode for calculating integral area.In more detail, standard deviation gap value is such as set as area discrepancy
Value.Then in step d) of the invention, it can include respectively to the measurement most characteristic value 500 ' and the signal waveform of the default value 500
Calculate integral area and draw an area discrepancy value A '.Therefore, the sensing degradation can pass through area discrepancy value A ' and be equal to
Or it is judged as deteriorating during more than the standard deviation gap value.
It please continue reference picture 7, it is the attenuation curve of the sensing signal of the web type flowmeter of the present invention.The sensing of the present invention
Degradation can also be made to judge using the attenuation curve of sensing signal.As shown in fig. 7, it is display sensing signal 50,50 '
(it is preferred that extreme maximum or minimum value) in the measuring value of different time, it is seen that sensing signal 50,50 ' be with
The mode of negative slope gradually decays, and when reality is implemented, sensing degradation can be set as after decaying to a setting value by user
It is judged as deteriorating.For example, detection method of the invention can further include a step e '), step e ') it is to obtain multiple measurements
Most characteristic value 500 ' and sort, those measurement most characteristic values 500 ' are compared with the default value 500, wherein the tittle
Survey when most characteristic value 500 ' is equal to or less than the default value 500, be then judged as that sensing deteriorates.
It is worth noting that, the induction blade of the rotary components of the present invention has a variety of implementation patterns.Such as Fig. 8 and Fig. 9, its
Show another two kinds of embodiment aspects of the induction blade of the present invention；In Fig. 8, in metalwork 43a insertions induction blade 42a and and fluid
Isolation, and induction blade 42a is set with the aspect of interval and separation.In addition, in Fig. 9, metalwork 43b is also embedded sensing leaf
In piece 42b, but respectively induction blade 42b side periphery is to connect the setting of adjacent induction blade 42b aspect.
Generally speaking, induction blade 42 of the invention, 42a, 42b are to be symmetric setting, and it is stable and suitable to use offer
Smooth rotation, when reality is implemented, induction blade 42,42a, 42b number of blade and shape neither limit.
Above-described embodiment explanation merely for convenience and illustrate, the of the invention interest field advocated should be to apply for a patent model
It is defined described in enclosing, rather than is only limitted to the embodiment.
Obviously, those skilled in the art can carry out the spirit of various changes and modification without departing from the present invention to invention
And scope.So, if these modifications and variations of the present invention belong to the claims in the present invention and its equivalent technologies scope it
Interior, then the present invention is also intended to comprising including these changes and modification.
Claims (12)
1. a kind of web type flowmeter of detectable flow direction, it is characterised in that for measuring the flow and stream of fluid in a pipeline
To the web type flowmeter includes：
The pipeline is stretched into body, the side and part for being arranged on the pipeline；
Arithmetic element, it is arranged in the body；
Sensing unit, it is arranged in the body and is electrically connected with the arithmetic element；And
Rotary components, it is arranged on the body and stretches into the part of the pipeline, and it is corresponding with the sensing unit；The rotation
Turn component to include rotating shaft and be disposed on described turn of axial a plurality of induction blades, gold is respectively equipped with each induction blade
Belong to part, each metalwork has different dielectric coefficients, and each metalwork sorts according to dielectric coefficient and is sequentially arranged each sensing
On blade；
Wherein, the rolling tangential direction of induction blade ora terminalis is the flow direction of fluid, when fluid stream is sensed in the pipeline
During blade, induction blade can be driven to rotate, make the sensing unit sense those there is the metalwork of different dielectric coefficient and
Produce intensity and progressively a plurality of sensing signals of increasing or decreasing and be transferred to the arithmetic element and carry out computing, thereby judge institute
It is forward flow or reverse flow to state fluid.
2. the web type flowmeter of detectable flow direction as claimed in claim 1, it is characterised in that the material of the body is pottery
Porcelain, can any of heat-proof macromolecule material, composite or metal.
3. the web type flowmeter of detectable flow direction as claimed in claim 1, it is characterised in that a plurality of induction blades
Relatively described rotating shaft is symmetric setting.
4. the web type flowmeter of detectable flow direction as claimed in claim 1, it is characterised in that the metalwork is to be embedded
Corresponding induction blade surface simultaneously contacts with the fluid.
5. the web type flowmeter of detectable flow direction as claimed in claim 1, it is characterised in that the sensing unit is shaken for one
Circuit is swung, the sensing unit includes Inductive component and the capacitance component in parallel with the Inductive component.
6. the web type flowmeter of detectable flow direction as claimed in claim 1, it is characterised in that the web type flowmeter enters one
Step includes a signal conversion unit, and the signal conversion unit is electrically connected with the sensing unit and the arithmetic element, the sense
Survey after signal is converted to cycle ripple signal by the signal conversion unit and be resent to the arithmetic element, and pass through the fortune
Calculate the computing of unit and be converted into flow signal.
7. the web type flowmeter of detectable flow direction as claimed in claim 6, it is characterised in that the web type flowmeter enters one
Step includes a voltage regulation unit, and the arithmetic element and the signal conversion unit is electrically connected in the voltage regulation unit, the voltage stabilizing list
Member one steady dc voltage source of output is simultaneously supplied to the arithmetic element and the signal conversion unit.
8. the web type flowmeter of detectable flow direction as claimed in claim 1, it is characterised in that the web type flowmeter enters one
Step includes the coffret unit for receiving external information or supplying information to arithmetic element progress computing, the coffret list
Member is electrically connected with the arithmetic element, and the arithmetic element system passes through the coffret unit and is sent to the sensing signal outer
Portion.
A kind of 9. detection method of the web type flowmeter of detectable flow direction, for any one of claim 1 to 8
Whether the induction blade of the web type flowmeter of detectable flow direction, which occurs to sense deterioration, is detected, it is characterised in that including with
Lower step：
A) default value is determined in arithmetic element；
B) receiving intensity changes a plurality of sensing signals of progressively increasing or decreasing；
C) it is compared using the intensity of those sensing signals, captures one and measure most characteristic value；And
D) arithmetic element carries out the judgement of degradation using the measurement most characteristic value and the default value.
10. the detection method of the web type flowmeter of detectable flow direction as claimed in claim 9, it is characterised in that step a)
Also including determining a default gap value, the detection method further comprises an a step e) and step f), wherein, step e) is
Compare the measurement most characteristic value and the default value and then draw a measurement gap value, step f) for compare the measurement gap value and
The default gap value deteriorates so as to judge to sense.
11. the detection method of the web type flowmeter of detectable flow direction as claimed in claim 9, it is characterised in that also include
Step e '), step e ') to obtain multiple measurements most characteristic value and sorting, by those measurement most characteristic values and the acquiescence
Value is compared, and wherein those are measured when most characteristic value is equal to or less than the default value, then is judged as that sensing deteriorates.
12. the detection method of the web type flowmeter of detectable flow direction as claimed in claim 9, it is characterised in that the acquiescence
Value and the measurement most characteristic value have a signal waveform respectively, step d) include respectively to the measurement most characteristic value and this write from memory
The signal waveform for recognizing value calculates integral area and draws an area discrepancy value, and the area discrepancy value is equal to or more than a standard deviation
Deteriorated away from value so as to judge to sense.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015766.1A CN104596589B (en) | 2015-01-13 | 2015-01-13 | The web type flowmeter and its detection method of detectable flow direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510015766.1A CN104596589B (en) | 2015-01-13 | 2015-01-13 | The web type flowmeter and its detection method of detectable flow direction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104596589A CN104596589A (en) | 2015-05-06 |
| CN104596589B true CN104596589B (en) | 2018-03-02 |
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| US5450760A (en) * | 1993-10-18 | 1995-09-19 | Lew; Hyok S. | Turbine flowmeter with capacitive transducer |
| US8706381B2 (en) * | 2011-05-31 | 2014-04-22 | GM Global Technology Operations LLC | System and method for detection failures of mass airflow sensors in a parallel intake engine |
| CN102384770B (en) * | 2011-08-11 | 2013-07-10 | 唐山海森电子有限公司 | Flow sensor for water source well |
| CN202471138U (en) * | 2012-02-16 | 2012-10-03 | 浙江先芯科技有限公司 | High-stability nonmagnetic flowmeter |
| CN103575340B (en) * | 2013-08-22 | 2016-04-06 | 浙江利尔达物联网技术有限公司 | Liquid flow non-magnetic detector and detection method thereof |
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