CN107218981A - A kind of gas flow surveying instrument and method based on ultrasonic wave by-pass flow principle - Google Patents
A kind of gas flow surveying instrument and method based on ultrasonic wave by-pass flow principle Download PDFInfo
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- CN107218981A CN107218981A CN201710345044.1A CN201710345044A CN107218981A CN 107218981 A CN107218981 A CN 107218981A CN 201710345044 A CN201710345044 A CN 201710345044A CN 107218981 A CN107218981 A CN 107218981A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
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Abstract
The present invention relates to gas flow rate field, more particularly to a kind of gas flow surveying instrument and method based on ultrasonic wave by-pass flow principle, belong to Novel measuring apparatus fields of measurement.The present invention includes main pipeline, by-pass flow pipeline, main pipeline and by-pass flow pipeline communication, and by-pass flow pipeline is located at the side of main pipeline, choked flow piece is set in main pipeline, formed and ultrasonic sensor is set in restricted flow passage, by-pass flow pipeline, main pipeline, by-pass flow pipeline, choked flow piece are collectively forming detection air flue；Pass through a kind of method shunted to main pipeline, choked flow piece is set in main pipeline, by determining the monotonic increase relation in by-pass flow pipeline between time difference and normal flow, gas flow is tested, moisture and etching problem can be effectively solved, the accurate measurement to Large Diameter Pipeline gas flow can be achieved.
Description
Technical field
The present invention relates to gas flow rate field, more particularly to a kind of gas flow inspection based on ultrasonic wave by-pass flow principle
Device and method is surveyed, belongs to Novel measuring apparatus fields of measurement.
Background technology
At present in the measurement of gas flow, the interference of the condensation of the burn into moisture of gas, Large Diameter Pipeline gas flowfield are not
Uniformity, the adaptability outranged of gas etc. is the different challenges that gas with various flow measurement principle is faced.Differential pressure type gas
Flowmeter body：Measurement accuracy is generally relatively low, and measurement range is narrow, requires that live straight length high, crushing is excessive, outranges even meeting
Measuring cell is damaged, corrosive gas also has the risk of corrosion to differential pressure elements；Vortex street gas flowmeter：Range is smaller,
Big by vibration influence, small-range section measurement is unstable, it is virtually impossible to measure, and sensing element corrosion resistance is poor；Heating type gas
Flowmeter：Advantage is that range ratio is very wide, and tiny flow quantity has fine advantage, and its major defect is that gas concentration change can be to flow
Impact, it is necessary to which the assistant analysis of gas componant measures volume flow, using the heat type gas flow of the probe of stainless steel
Count corrosion resistance good, but response speed is slow, using MEMS thermal sensors main flow (Mainstream) or by-pass flow
(Sidestream) thermal gas flowmeter：Such as document US6779395B2, propose it is a kind of be used to measure in bypass gas or
The device of fluid flow, proposes the measurement scheme that Large Diameter Pipeline fluid is solved using bypass, its fast response time, but resist first
Corrosivity is poor, and resistance tocrocking is poor；Ultrasonic gas flowmeter：The high range ratio of similar thermal flowmeter, 1 can be reached:160
Range ratio can still obtain very high precision.Being capable of suitably corrosive gas, the flow measurement of such as biogas.Compared to hot type gas
Flowmeter body, ultrasonic gas flowmeter measurement volume is not influenceed by gas componant.Compared to differential pressure type and vortex street gas stream
Gauge, ultrasonic gas flowmeter is almost without crushing, and non mechanical movable, longtime running is easy to peace without special maintenance
Dress, it is reliable and stable.In addition, ultrasonic flowmeter, for some occasions, can also be measured while gas flow is measured simultaneously
Composition, such as document CN103454344A, propose apply ultrasonic wave principle at home first, it is possible to resolve gas componant and flow
While measure, but several challenges that current ultrasonic gas flowmeter faces are：(1) gas absorbed in praetersonic
In, such as in the biogas and high concentration CO 2 natural gas of high concentration CO 2, the signal of ultrasonic wave due to energy absorption signal very
It is small, error even mistake is easily caused, caliber is bigger, and problem is more serious.(2) apply in Large Diameter Pipeline occasion, it is impossible to ensure to cut
Surface current field distribution uniformity, causes measurement error, and (3) measurement pipeline is when having condensate moisture, such as in biogas field, measurement from
The biogas that fermentation tank comes out, can not be excluded the problem of due to condensate moisture, it will cause ultrasonic probe accumulated water in time, cause to survey
Accuracy of measurement declines even test failure.
By being found to prior art analysis, the more apparent (wide-range of gas flow advantage is measured with ultrasonic technology
Than pressure drag is small, can also measure composition etc.), but ultrasonic gas e measurement technology urgently to be resolved hurrily is applied in high-moisture gas at present
Such as fields of measurement of biogas composition, and Large Diameter Pipeline, praetersonic can absorb the gas flow test problem in the fields such as gas.
The content of the invention
Based on problem above, the present invention proposes a kind of gas flow surveying instrument and side based on ultrasonic wave by-pass flow principle
Method, sets choked flow piece to constitute restricted flow passage by setting by-pass flow pipeline in main pipeline side, and in main pipeline；It may be selected
Perforate at restricted flow passage choked flow piece, can reduce condensed moisture and be detained in pipeline, can eliminate influence of the moisture to measurement；Pass through
The time difference of ultrasonic probe, measurement by-pass flow pipe ultrasonic ripple following current and adverse current is set in by-pass flow pipeline, using least square
Method, determines the monotonic increase relation between the corresponding main pipeline normal stream value of by-pass flow pipeline time difference, can measure gas
Flow.Using the invention：(1) influence that condensed moisture may be to ultrasonic gas flowmeter can effectively be solved；(2) for big pipe
The gas flow measurement field in footpath, the uniformity requirement of stream field is substantially reduced；(3) in the gas absorbed for praetersonic,
For example in the biogas of high concentration CO 2 and high CO2 natural gases, even if the caliber of main drive tube is doubled and redoubled, the measurement dress of by-pass flow pipeline
Putting can not change or vary less, so in the by-pass flow pipeline of the gas of energy absorption containing praetersonic, once it is determined that closing
Suitable structure, it is possible to be fixed up, changes without being changed according to the caliber of main pipeline, can so realize supersonic gas
Flowmeter body measures the standardization of part so that the adaptability of ultrasonic gas flowmeter, fault-tolerance is stronger, and precision is higher.
The present invention is addressed by following technical proposals：
A kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle, it is characterized in that：Including main pipeline, by-pass flow pipe
Road, main pipeline and by-pass flow pipeline communication, by-pass flow pipeline, which is located in the side of main pipeline, main pipeline, sets at least one choked flow piece,
Formed and ultrasonic sensor is set in restricted flow passage, by-pass flow pipeline, main pipeline, by-pass flow pipeline, restricted flow passage are collectively forming detection
Air flue.
In a kind of above-mentioned detection of gas flow rate device based on ultrasonic wave by-pass flow principle, the choked flow piece is arranged in pairs,
And it is arranged on the top and the bottom of main pipeline inwall.
In a kind of above-mentioned detection of gas flow rate device based on ultrasonic wave by-pass flow principle, main pipeline passes through with by-pass flow pipeline
At least two subsidiary conduits are connected, and choked flow piece is arranged between subsidiary conduit and two connected entrances of main pipeline, main pipeline middle position
Pipeline formation channel of resistance to flow between two connected entrances.
In a kind of above-mentioned detection of gas flow rate device based on ultrasonic wave by-pass flow principle, choked flow piece and main pipeline in pair
Claim or set with tube wall into angle, form restricted flow passage.
In a kind of above-mentioned detection of gas flow rate device based on ultrasonic wave by-pass flow principle, in the resistance of main pipeline inner wall lower
The tank through whole choked flow piece is provided with stream part.
A kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle, it is characterized in that：Including main pipeline, by-pass flow pipe
Road, main pipeline and by-pass flow pipeline communication, by-pass flow pipeline are located at the side of main pipeline, and main pipeline passes through at least two with by-pass flow pipeline
Subsidiary conduit is connected, and subsidiary conduit one end is goed deep into main pipeline and extended forward, and one end that subsidiary conduit extends forward is provided with limit
Ultrasonic sensor is set in circulation road, by-pass flow pipeline, and main pipeline, by-pass flow pipeline, restricted flow passage are collectively forming detection air flue.
In a kind of above-mentioned detection of gas flow rate device based on ultrasonic wave by-pass flow principle, subsidiary conduit extend forward one
End is symmetrical provided with two, and two choke tubes that the one end extended forward with subsidiary conduit at right angles or in angle is set, two
Choke tube one end is connected with two subsidiary conduits respectively, and another end opening and difference of two choke tubes are respective to main pipeline
Two ends extend, and two choke tubes are restricted flow passage.
In a kind of above-mentioned detection of gas flow rate device based on ultrasonic wave by-pass flow principle, subsidiary conduit extend forward one
End is provided with a choke tube set with main pipeline tube walls parallel or in angle, one end and resistance that subsidiary conduit extends forward
Flow tube connect, the both ends open of choke tube and respectively to main pipeline two ends extend, the choke tube be restricted flow passage.
A kind of method that detection of gas flow rate is carried out using the detection of gas flow rate device based on ultrasonic wave by-pass flow principle, its
It is characterized in：Comprise the following steps：
A. realize that to main pipeline gas distribution a part of gas is in by-pass flow pipeline flow by by-pass flow pipeline, restricted flow passage；
Another part gas circulates in restricted flow passage；
B. by ultrasonic sensor, following current time and adverse current time in test by-pass flow pipeline, ultrasonic wave is calculated in by-pass flow
Pipeline following current time and adverse current time difference；
C. ultrasonic wave is read in the corresponding main pipeline normal stream of by-pass flow pipeline time difference by calibrating gas flow apparatus
Value；
D. the monotonically increasing function relation of time difference and main pipeline normal stream value is gone out by digital simulation；
E. during actual measurement, according to the monotonically increasing function relation of time difference and main pipeline normal stream value, it is determined that main
The actual flow of pipeline gas.
The advantage of the present invention：It is simple in construction that the present invention had both used for reference differential pressure type gas flowmeter, flow field uniformity requirement compared with
Low advantage, also used for reference ultrasonic gas flowmeter high range than, it is corrosion-resistant, even can be while measuring the advantage of composition.
Pass through the present invention：(1) influence that condensed moisture may be to ultrasonic gas flowmeter can effectively be solved；(2) for Large Diameter Pipeline
Gas flow measurement field, the uniformity requirement of stream field is substantially reduced；(3) in the gas absorbed for praetersonic, for example
In the biogas of high concentration CO 2 and high CO2 natural gases, even if the caliber of main drive tube is doubled and redoubled, the measurement apparatus of by-pass flow pipeline can
Not change or vary less, so in the by-pass flow pipeline of the gas of energy absorption containing praetersonic, once it is determined that suitably
Structure, it is possible to be fixed up, changes without being changed according to the caliber of main pipeline, can so realize ultrasonic gas stream
The standardization of flowmeter measurement part so that the adaptability of ultrasonic gas flowmeter, fault-tolerance is stronger, and precision is higher.
Brief description of the drawings
Fig. 1 is the 1st kind of detection of gas flow rate schematic device based on ultrasonic wave by-pass flow principle.
Fig. 2 is the 2nd kind of detection of gas flow rate schematic device based on ultrasonic wave by-pass flow principle.
Fig. 3 is the 3rd kind of detection of gas flow rate schematic device based on ultrasonic wave by-pass flow principle.
Fig. 4 is the 4th kind of detection of gas flow rate schematic device based on ultrasonic wave by-pass flow principle.
Fig. 5 is the 5th kind of detection of gas flow rate schematic device based on ultrasonic wave by-pass flow principle.
Fig. 6 is the 6th kind of detection of gas flow rate schematic device based on ultrasonic wave by-pass flow principle.
Fig. 7 a are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the mounting means 1 of sonac 4
Schematic diagram.
Fig. 7 b are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the mounting means 2 of sonac 4
Schematic diagram.
Fig. 7 c are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the mounting means 3 of sonac 4
Schematic diagram.
Fig. 7 d are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the mounting means 4 of sonac 4
Schematic diagram.
Fig. 8 a are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- position master in osculum or groove 5 the 1st
View.
Fig. 8 b are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- position master in osculum or groove 5 the 2nd
View.
Fig. 8 c are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- position master in osculum or groove 5 the 3rd
View.
Fig. 8 d are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- position master in osculum or groove 5 the 4th
View.
Fig. 8 e are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- position master in osculum or groove 5 the 5th
View.
Fig. 8 f are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- position master in osculum or groove 5 the 6th
View.
Fig. 9 a are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the front view of the shape 1 of choked flow piece 3.
Fig. 9 b are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the front view of the shape 2 of choked flow piece 3.
Fig. 9 c are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the front view of the shape 3 of choked flow piece 3.
Fig. 9 d are the detection of gas flow rate device based on ultrasonic wave by-pass flow principle --- the front view of the shape 4 of choked flow piece 3.
Figure 10 is the fitted figure of detection of gas flow rate embodiment of the method one based on ultrasonic wave by-pass flow principle.
Figure 11 is the fitted figure of detection of gas flow rate embodiment of the method two based on ultrasonic wave by-pass flow principle.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.Accompanying drawing is said
It is bright：1-main pipeline；2-by-pass flow pipeline；3-choked flow piece；4-ultrasonic sensor；5-osculum or groove；6-restricted flow passage.
Embodiment 1
A kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle, including main pipeline 1, by-pass flow pipeline 2 are set, it is main
Pipeline 1 is connected with by-pass flow pipeline 2, by-pass flow pipeline 2 be located at main pipeline 1 side or top, along the inwall of main pipeline 1 above and below it is right
Claim to set ultrasonic sensor 4 in the choked flow piece 3 of setting two, by-pass flow pipeline 2, main pipeline 1, by-pass flow pipeline 2, choked flow piece 3 are total to
Air flue is detected with being formed.
In the inner side of main pipeline 1, axially arranged two arcs are square or trapezoidal choked flow piece, as shown in accompanying drawing 1-3.
Begin to rehearse water hole or groove 5 at the bottom choked flow piece 3 of main pipeline 1, and 1 osculum can be set in A, B, C, D in such as accompanying drawing 8
Or 2-3 osculums or groove can be set in E, F in groove, or accompanying drawing 8.
Ultrasonic sensor 4 may be configured as shown in Figure 7：A:Direct light type, B:X-type (0 ° of 180 ° of ＜ θ ＜), C：V-type
(0 ° of 90 ° of ＜ θ ＜), D：W types (0 ° of 90 ° of ＜ θ ＜).
Measuring process is：
A. realize that a part of gas is in by-pass flow pipeline 2 to the gas distribution of main pipeline 1 by by-pass flow pipeline 2, restricted flow passage 6
Circulation；Another part gas circulates in restricted flow passage 6；
B. by ultrasonic sensor 4, following current time t1 and adverse current time t2 in test by-pass flow pipeline 2, when calculating following current
Between and adverse current time difference Δ T；
C. the corresponding normal stream value Q1 of main pipeline 1 of gas flow standard device read access time difference DELTA T are passed through；
D. the monotonic increase for going out time difference Δ T and main pipeline normal flow Q1 by least square method digital simulation is closed
System:
Δ T and Q1 monotonic increase relation can be linear relationship or non-linear relation；Such as：
Q1=anΔTn+an-1ΔTn-1+...+a1ΔT+a0(n is nonnegative integer)
an、an-1...a0For undetermined coefficient；
Selection is under the conditions of 20 DEG C, standard atmospheric pressure (101.3Kpa), the internal diameter 50mm of main pipeline 1, the internal diameter of by-pass flow pipeline 2
12mm, the sound channel length 35mm of ultrasonic sensor 4, choked flow piece use circular arc shown in Fig. 1, and wherein choked flow piece is diameter 60mm, arc
Spend for the circular arc of (80-85 °)；Accuracy of timekeeping is 0.1ns, and test result is as follows：
Table one
It can be fitted such as the relational expression of accompanying drawing 10 according to the data of table one, n=2 can be drawn：
an=a2=0.00001787, an-1=a1=-0.00849269, a0=4.47160823
Then：Q1=0.00001787* Δs T2-0.00849269*ΔT+4.47160823；
E. during actual measurement, according to time difference Δ T and main pipeline normal stream value Q1 monotonic increase relation, it is determined that main
The real gas flow of pipeline gas.
Embodiment 2
A kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle, including main pipeline 1, by-pass flow pipeline 2 are set, it is main
Pipeline 1 is connected with by-pass flow pipeline 2, by-pass flow pipeline 2 be located at main pipeline 1 side or top, along the inwall of main pipeline 1 above and below it is right
Claim to set ultrasonic sensor 4 in the choked flow piece 3 of setting two, by-pass flow pipeline 2, main pipeline 1, by-pass flow pipeline 2, choked flow piece 3 are total to
Air flue is detected with being formed.
In the inner side of main pipeline 1, axially arranged two arcs are square or trapezoidal choked flow piece, as shown in accompanying drawing 1-3.
Ultrasonic sensor 4 may be configured as shown in Figure 7：A:Direct light type, B:X-type (0 ° of 180 ° of ＜ θ ＜), C：V-type
(0 ° of 90 ° of ＜ θ ＜), D：W types (0 ° of 90 ° of ＜ θ ＜).
Measuring process is：
A. realize that a part of gas is in by-pass flow pipeline 2 to the gas distribution of main pipeline 1 by by-pass flow pipeline 2, restricted flow passage 6
Circulation；Another part gas circulates in restricted flow passage 6；
B. by ultrasonic sensor 4, following current time t1 and adverse current time t2 in test by-pass flow pipeline 2, when calculating following current
Between and adverse current time difference Δ T；
C. the corresponding normal stream value of main pipeline 1 of standard set-up read access time difference is passed through；
D. time difference Δ T and main pipeline normal flow Q1 monotonic increase relation are gone out by digital simulation:
Δ T and Q1 monotonic increase relation can be linear relationship or non-linear relation, such as：
Q1=anΔTn+an-1ΔTn-1+...+a1ΔT+a0(n is nonnegative integer)
an、an-1...a0To treat undetermined coefficient；
Selection is under the conditions of 20 DEG C, standard atmospheric pressure (101.3Kpa), the internal diameter 100mm of main pipeline 1, the internal diameter of by-pass flow pipeline 2
12mm, the ultrasonic sound channel length 35mm of quantity sensor 4, choked flow piece is using shown in Fig. 1, and wherein choked flow piece is diameter 80mm, and radian is
The circular arc of (100-104 °)；Accuracy of timekeeping is 0.1ns, and test result is as follows：
Table two
It can be fitted such as the relational expression of accompanying drawing 11 according to the data of table two, n=1 can be drawn：
an=a1=-0.18421846, a0=-75.15928864
Then：Q1=-0.18421846* Δs T-75.15928864；
E. during actual measurement, according to time difference Δ T and main pipeline normal stream value Q1 monotonic increase relation, it is determined that main
The actual flow of pipeline gas.
Embodiment 3
As shown in accompanying drawing 4,5：The part of by-pass flow pipeline 2 is arranged in main pipeline 1 as choked flow piece 3, in by-pass flow pipeline 2
Ultrasonic sensor 4 is set.
As shown in Figure 6：By-pass flow pipeline 2 is located at the side of main pipeline 1, if being set along the parallel current direction of main pipeline 1
The dry intensive choked flow piece 3 of arrangement, choked flow piece 3 is the small tubes of several both ends opens, as shown in A, B of accompanying drawing 9；
Choked flow piece 3 may also be configured to comb teeth-shaped, as shown in C, D of accompanying drawing 9.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (9)
1. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle, it is characterized in that：Including main pipeline, by-pass flow pipeline,
Main pipeline and by-pass flow pipeline communication, by-pass flow pipeline, which is located in the side of main pipeline, main pipeline, sets at least one choked flow piece, is formed
Ultrasonic sensor is set in restricted flow passage, by-pass flow pipeline, and main pipeline, by-pass flow pipeline, restricted flow passage are collectively forming detection air flue.
2. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle according to claim 1, it is characterized in that：Institute
State choked flow piece to be arranged in pairs, and be arranged on the top and the bottom of main pipeline inwall.
3. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle according to claim 1, it is characterized in that：It is main
Pipeline is connected with by-pass flow pipeline by least two subsidiary conduits, and choked flow piece be arranged on subsidiary conduit and main pipeline two connect
It is located at the pipeline formation channel of resistance to flow between two connected entrances between mouthful, in main pipeline.
4. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle according to claim 1, it is characterized in that：Resistance
Part is flowed with main pipeline in symmetrically or with tube wall being set into angle, forms restricted flow passage.
5. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle according to claim 1, it is characterized in that：
The tank through whole choked flow piece is provided with the choked flow piece of main pipeline inner wall lower.
6. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle, it is characterized in that：Including main pipeline, by-pass flow pipeline,
Main pipeline and by-pass flow pipeline communication, by-pass flow pipeline are located at the side of main pipeline, and main pipeline is auxiliary by least two with by-pass flow pipeline
Pipeline communication is helped, subsidiary conduit one end is goed deep into main pipeline and extended forward, and one end that subsidiary conduit extends forward is provided with current limliting
Ultrasonic sensor is set in passage, by-pass flow pipeline, and main pipeline, by-pass flow pipeline, restricted flow passage are collectively forming detection air flue.
7. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle according to claim 6, it is characterized in that：It is auxiliary
Help one end that pipeline extends forward symmetrical provided with two, and the one end extended forward with subsidiary conduit at right angles or in angle is set
Two choke tubes, two choke tube one end connect with two subsidiary conduits respectively, and another end opening of two choke tubes and
Each extend respectively to the two ends of main pipeline, two choke tubes are restricted flow passage.
8. a kind of detection of gas flow rate device based on ultrasonic wave by-pass flow principle according to claim 7, it is characterized in that：It is auxiliary
The one end for helping pipeline to extend forward is provided with a choke tube set with main pipeline tube walls parallel or in angle, subsidiary conduit
The one end extended forward is connected with choke tube, the both ends open of choke tube and respectively to main pipeline two ends extend, the choke tube
For restricted flow passage.
9. the detection of gas flow rate device based on ultrasonic wave by-pass flow principle described in a kind of use claim 1 or 2 carries out gas
The method of flow detection, it is characterized in that：Comprise the following steps：
A. realize that to main pipeline gas distribution a part of gas is in by-pass flow pipeline flow by by-pass flow pipeline, restricted flow passage；It is another
Portion gas circulates in restricted flow passage；
B. by ultrasonic sensor, following current time and adverse current time in test by-pass flow pipeline, ultrasonic wave is calculated in by-pass flow pipeline
Following current time and adverse current time difference；
C. ultrasonic wave is read in the corresponding main pipeline normal stream value of by-pass flow pipeline time difference by calibrating gas flow apparatus；
D. the monotonically increasing function relation of time difference and main pipeline normal stream value is gone out by digital simulation；
E. during actual measurement, according to the monotonically increasing function relation of time difference and main pipeline normal stream value, main pipeline is determined
The actual flow of gas.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092232A (en) * | 2016-06-20 | 2016-11-09 | 浙江圣地物联科技有限公司 | A kind of bypass correlation acoustic wave flow meter |
| WO2021100539A1 (en) * | 2019-11-19 | 2021-05-27 | パナソニックＩｐマネジメント株式会社 | Ultrasonic flowmeter |
| CN113518900A (en) * | 2019-03-01 | 2021-10-19 | 彼得罗菲奥伦蒂尼有限公司 | Method for detecting the flow of gas in a main conduit and device for measuring the flow of gas in a gas conduit |
| CN113970365A (en) * | 2021-10-29 | 2022-01-25 | 华能重庆两江燃机发电有限责任公司 | Large-pipe-diameter large-flow-measurement system and method |
| DE102020122596A1 (en) | 2020-08-28 | 2022-03-03 | Ifm Electronic Gmbh | Measuring device for flow measurement in a pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106092232A (en) * | 2016-06-20 | 2016-11-09 | 浙江圣地物联科技有限公司 | A kind of bypass correlation acoustic wave flow meter |
| CN113518900A (en) * | 2019-03-01 | 2021-10-19 | 彼得罗菲奥伦蒂尼有限公司 | Method for detecting the flow of gas in a main conduit and device for measuring the flow of gas in a gas conduit |
| CN113518900B (en) * | 2019-03-01 | 2024-05-14 | 彼得罗菲奥伦蒂尼有限公司 | Device for measuring the flow of a gas in a gas line |
| WO2021100539A1 (en) * | 2019-11-19 | 2021-05-27 | パナソニックＩｐマネジメント株式会社 | Ultrasonic flowmeter |
| DE102020122596A1 (en) | 2020-08-28 | 2022-03-03 | Ifm Electronic Gmbh | Measuring device for flow measurement in a pipe |
| CN113970365A (en) * | 2021-10-29 | 2022-01-25 | 华能重庆两江燃机发电有限责任公司 | Large-pipe-diameter large-flow-measurement system and method |
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