CN201247251Y - Measurement gauge for pipe gas flow rate and sonic velocity - Google Patents
Measurement gauge for pipe gas flow rate and sonic velocity Download PDFInfo
- Publication number
- CN201247251Y CN201247251Y CNU2008201522136U CN200820152213U CN201247251Y CN 201247251 Y CN201247251 Y CN 201247251Y CN U2008201522136 U CNU2008201522136 U CN U2008201522136U CN 200820152213 U CN200820152213 U CN 200820152213U CN 201247251 Y CN201247251 Y CN 201247251Y
- Authority
- CN
- China
- Prior art keywords
- sound
- velocity
- pipeline
- sound source
- gas flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to a pipeline gas flow velocity and sonic velocity meter based on the principle of velocity vector synthesis, which comprises a first sound source, a first acoustic sensor, a second acoustic sensor and a signal analysis acquiring device, wherein the first sound source is arranged on the inner wall of a gas pipeline with the known diameter, and can send out a first acoustic signal, the first acoustic sensor and the second acoustic sensor are arranged on the inner wall of the pipeline for receiving the acoustic signal, wherein the second acoustic sensor, the first acoustic sensor and the first sound source are arranged on the two opposite sides of the longitudinal cross section of the pipeline, and the second acoustic sensor and the first acoustic sensor are separated in a known distance. The signal analysis acquiring device is connected with the first sound source, the first acoustic sensor and a second acoustic sensor, and can calculate the gas flow velocity and the sonic velocity in gas according to the diameter of the pipeline, the distance, the first time and the second time of receiving the acoustic signal by the first acoustic sensor and the second acoustic sensor.
Description
Technical field
The utility model relates to a kind of pipeline gas flow velocity and velocity of sound meter, belongs to the mechanical driver unit fields of measurement.
Background technology
At present, the gas flow rate of pipeline adopts equipment such as wind gage, Pitot tube, orifice plate to measure usually.Wherein, the point measurement meter can only measure the wind speed at measuring point place, and actual mean wind speed need carry out multimetering at the measurement section and just can obtain; The surveying instrument of orifice-plate type one class is bigger to the pressure loss that air-flow in the pipeline produces.
The existing at present equipment that adopts fluid flow in the velocity of sound principle measuring channel, but it can not be used for the gas flow rate measurement of pipeline.
The utility model content
Technical problem to be solved in the utility model provides the gas flow rate and the velocity of sound actual in a kind of real-time measuring channel, and does not influence the pipeline gas flow velocity and the velocity of sound meter of gas flow in the pipeline.
The utility model is that to solve the problems of the technologies described above the technical scheme that adopts be to propose a kind of pipeline gas flow velocity and velocity of sound meter, comprises first sound source, first sound transducer, second sound sound sensor and signal analysis collector.First sound source is located at the gas pipeline inwall with known diameter, and first sound source can be sent first voice signal.First sound transducer and second sound sound sensor are located at this inner-walls of duct, in order to receive voice signal.Wherein second sound sound sensor, first sound transducer and first sound source are located at the relative both sides of this pipeline longitudinal section, and second sound sound sensor and first sound transducer are at a distance of a known distance.The signal analysis collector, connect first sound source, first sound transducer and second sound sound sensor, and the very first time that is received by first sound transducer and second sound sound sensor respectively according to pipe diameter, this distance and first voice signal and the velocity of sound in the second Time Calculation gas flow rate and the gas.
In above-mentioned pipeline gas flow velocity and velocity of sound meter, first sound transducer is arranged in the upstream of pipeline first sound source, and second sound sound sensor is arranged in the downstream of pipeline first sound source.
In above-mentioned pipeline gas flow velocity and velocity of sound meter, distance equates between the distance between first sound transducer and first sound source and the second sound sound sensor and first sound source.
In above-mentioned pipeline gas flow velocity and velocity of sound meter, distance is unequal between distance between first sound transducer and first sound source and second sound sound sensor and first sound source.
In above-mentioned pipeline gas flow velocity and velocity of sound meter, also can comprise second sound source, be located at inner-walls of duct, second sound source can be sent second sound signal, and wherein second sound source and first sound source are located at the homonymy of pipeline longitudinal section; Wherein the signal analysis collector also connects second sound source and the 3rd time that received by first sound transducer and second sound sound sensor respectively according to second sound signal and the velocity of sound in the 4th Time Calculation gas flow rate and the gas.
In above-mentioned pipeline gas flow velocity and velocity of sound meter, first sound source and first sound transducer are symmetrical arranged about pipe centerline, and this second sound source and second sound sound sensor are symmetrical arranged about pipe centerline.
In above-mentioned pipeline gas flow velocity and velocity of sound meter, first voice signal that first sound source and second sound source are sent respectively and second sound signal are the high-frequency impulse crosstalks.
Pipeline gas flow velocity of the present utility model and velocity of sound meter can be measured actual flow velocity, the velocity of sound insusceptibly in the gas pipeline of different pressures, temperature, flow velocity, have aspect advantages such as stable, quick, easy and simple to handle, that price is lower.The utility model both had been applicable to the gas flow rate actual in the gas exhaust duct of equipment such as similar diesel engine and the measurement of the velocity of sound, also was fit to the measurement of other pipeline gas flow velocity.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Fig. 1 is the layout synoptic diagram according to the single-point acoustic structure meter of the utility model one embodiment.
Fig. 2 is the velocity of sound and the synthetic synoptic diagram of gas flow rate of meter shown in Figure 1.
Fig. 3 A and Fig. 3 B are the layout synoptic diagram according to the two point acoustic structure meter of another embodiment of the utility model.
Fig. 4 is a practical application example of meter of the present utility model.
Embodiment
The work of research flowing gas duct element needs the gas flow rate and the velocity of sound actual in the correct measurement pipeline.But in the gas exhaust duct of equipment such as similar diesel engine, the flow of gas, temperature, pressure, dielectric property etc. have influenced the gas flow rate and the velocity of sound in the gas exhaust duct.The utility model is based on the synthetic principle of velocity, i.e. the synthetic velocity of sound of this point of vector superposed formation of acoustic speed of propagation in the gas flow rate of arbitrfary point and this gas in the flowing gas.Therefore, the utility model can not be subjected to the influence of factors such as temperature, pressure, dielectric property, in real time the flow velocity and the velocity of sound of measurement gas.
Basic design of the present utility model is, in pipeline, gas that flows along pipeline and the velocity of sound stack that in flowing gas, blazes about, in the synthetic velocity of sound of sound source upstream the synthetic velocity of sound less than sound source, and in the synthetic velocity of sound in the sound downstream synthetic velocity of sound greater than sound source.Measure the synthetic velocity of sound in the downstream, synthetic velocity of sound harmony source of sound source upstream respectively, by resolving the flow velocity and the velocity of sound that can obtain gas in the pipeline.
In a plurality of embodiment of the present utility model, sound source and sound check point relative duct size center line opposite are arranged make from the sound source to the sound detection point route of transmission cross the chimneying cross section, making the gas velocity that measures is the mean air flow speed of pipeline.
Below in conjunction with accompanying drawing a plurality of embodiment of the present utility model is described.
Fig. 1 is the layout synoptic diagram according to the single-point acoustic structure meter of the utility model one embodiment.With reference to shown in Figure 1, a kind of pipeline gas flow velocity and the velocity of sound meter 100 of present embodiment comprise first sound source 101, first sound transducer 102, second sound sound sensor 103 and signal analysis collector 104.First sound source 101, first sound transducer 102, second sound sound sensor 103 all are located at the inwall of pipeline 110.In embodiment of the present utility model, can be by modes such as perforate, joint or adapters, sound source 101 and sound transducer 102,103 directly are communicated with gas in the pipeline 110.
During first sound source 101 is located in the pipeline on the middle tube wall at the simple relatively and straight pipeline place that the cross section is constant.First sound source 101 can be sent first voice signal.In a preferred embodiment, first sound source 101 can be sent the high-frequency impulse crosstalk.First sound transducer 102,103 of second sound sound sensors are located at first sound 101 and are positioned on the opposite side tube wall of same pipeline longitudinal section.Wherein the longitudinal section is the cross section by pipe centerline.In the present embodiment, first sound transducer 102 is located at the upstream of first sound source 101, and second sound sound sensor 103 is located at the downstream of first sound source 101, and first sound transducer 102 and second sound sound sensor 103 is at a distance of known distance 2L.Be simplified structure and calculating, the distance of first sound transducer 102 and first sound source 101 is identical with the distance of the second sound sound sensor 103 and first sound source 101.But in another embodiment, the distance of the two can be different.
In Fig. 1, D is the sound source of pipe diameter or uprush direction and the distance of sound receiving sensor, L is the sound source of parallel airflow direction and the distance of sound receiving sensor, t0 is the time that first voice signal (as the high-frequency pulse string noise signal) sends, t1 is the time that first sound transducer 102 receives the high-frequency pulse string noise signal, and t2 is the time that second sound sound sensor 103 receives the high-frequency pulse string noise signal.Suppose when measuring that the gas isotropy that the velocity of sound of arbitrfary point flows relatively in the pipeline, the velocity of sound of any direction are identical; Gas flow rate is that the interior sound source of pipeline is to average gas flow rate between the sound acceptance point.The synthetic velocity of sound (with reference to Fig. 2) be distance between two points divided by the time, by measurement time t 1, t2, can obtain the velocity of sound and gas flow rate after resolving.
The computing formula of finding the solution is as follows.
In formula (1), the formula (2):
Vs---the velocity of sound, m/s;
Vair---gas flow rate, m/s.
When the temperature of pipeline and gas is higher, the measurement additional line of sound source and sound transducer employing cooling can be drawn out to and have fallen warm place.Therefore, single-point sound source structure measurement sends impulse noise signal to the very first time t1 that receives impulse noise signal, the second time t2, is subjected to the influence of additional line, and precision can reduce.
For this reason, another embodiment of the present utility model proposes a kind of meter of two point sound source structures.Two point sound source structures are only measured in the service pipe of the measured velocity of sound and gas flow rate upstream and downstream sound receiving sensor and are received that sound source sends the mistiming of impulse noise signal, have shielded the influence of additional cooling line; And under identical condition, strengthened the distance of sound source and receiving sensor, therefore improved measuring accuracy.
Fig. 3 A and Fig. 3 B are the layout synoptic diagram according to the two point acoustic structure meter of another embodiment of the utility model.Shown in Fig. 3 A and Fig. 3 B, a kind of pipeline gas flow velocity and the velocity of sound meter 200 of present embodiment comprise first sound source 201, second sound source 202, first sound transducer 203, second sound sound sensor 204 and signal analysis collector 205.First sound source 201, second sound source 202, first sound transducer 203, second sound sound sensor 204 all are located at the inwall of pipeline 210.In embodiment of the present utility model, can be by modes such as perforate, joint or adapters, sound source 201,202 and sound transducer 203,204 directly are communicated with gas in the pipeline 210.
Measuring process is as follows: at first, first sound source 201 that is positioned at the upstream is sent first voice signal (as the noise of high-frequency pulse string), with reference to Fig. 3 A, two sound transducer T1 interval time (=t1b-t1a) successively receive noise, wherein t1a is the very first time that first sound transducer 203 is received noise, and t1b is second time that second sound sound sensor 204 is received noise.Then, second sound source 202 that is positioned at the downstream is sent second sound signal (as the noise of high-frequency pulse string), with reference to Fig. 3 B, two sound transducer T2 interval time (=t2a-t2b) successively receive noise, wherein t2a is the 3rd time that first sound transducer 203 is received noise, and t2b is the 4th time that second sound sound sensor 204 is received noise.
When gas flow rate when the velocity of sound direction of sound is identical in measuring section with first sound source 201, the synthetic velocity of sound is the amplitude addition of the gas flow rate and the equidirectional velocity of sound---greater than the velocity of sound; When gas flow rate and second sound source 202 when the velocity of sound direction of sound is opposite in measuring section, the synthetic velocity of sound is that the amplitude of the gas flow rate and the reverse velocity of sound is subtracted each other---less than the velocity of sound.Therefore, the mistiming T1＜T2 by same distance L.
Draw gas flow rate V in the pipeline after resolving
Air-flowVelocity of sound V with no gas flow in the pipeline
Sound
Because sound source and sound transducer arrange that in the pipeline both sides the synthetic velocity of sound is crossed pipe transmmision, so gas flow rate can think that pipeline crosses the mean value in the approach.
The computing formula of finding the solution is as follows.
In formula (3), the formula (4):
Vs---the velocity of sound, also note is made V
Sound, m/s;
Vair---gas flow rate, also note is made V
Air-flow, m/s;
The lateral separation of L---sound source and sound receiving sensor, m;
D---pipe diameter, the vertical distance of sound source and sound receiving sensor, m;
T1---two sound receiving sensors are received the mistiming that upstream sound source (1) is sent impulse noise signal, s;
T2---two sound receiving sensors are received the mistiming that downstream sound source (2) is sent impulse noise signal, s.
Fig. 4 is a practical application example of meter of the present utility model.In this application examples, adopt two point sound source structures in Fig. 3 A, the 3B illustrated embodiment, wherein measuring channel 310 adopts axial geometric scale bigger, the product that the time of sonic propagation is long, so precision is higher.Sound source 301,302 is a water-cooled noise injector, and loudspeaker 301a, 302a are set in it.Sound transducer 303,304 can adopt the water-cooled noise meter, and they connect respectively measures microphone 303a, 304a.These parts and signal analysis collector (figure does not show) all can adopt commercially available product.
In should use-case, the hundreds of rice of velocity of sound scope per second, gas flow rate is at the tens of rice of per second, gas temperature is in hundreds of degree Celsius in the pipeline, sound source 301,302 and sound transducer 303,304 are handled by water-cooled, and it is the collector of 10us that temporal resolution is adopted in the time measurement of paired pulses noise signal.The resolution of the velocity of sound and gas flow rate is several 0.1 meter of per second, the actual precision that reaches 1 meter of per second.This application examples can satisfy the needs of diesel engine exhaust system test actual measurement and research.
In sum, pipeline gas flow velocity of the present utility model and velocity of sound meter can fast, accurately be measured actual flow velocity, the velocity of sound insusceptibly in the gas pipeline of different pressures, temperature, flow velocity.Compare point measurement meter in the past, this meter can measuring channel in the mean flow rate of gas, compare board-like meter in the past, this meter can not produce obviously influence to air-flow in the pipeline.Therefore pipeline gas flow velocity of the present utility model and velocity of sound meter have aspect advantages such as stable, quick, easy and simple to handle, that price is lower.
In addition, pipeline gas flow velocity of the present utility model and velocity of sound meter in the flow velocity of studying and survey diesel engine exhaust muffler, the velocity of sound, have fast and the high characteristics of precision.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (7)
1. pipeline gas flow velocity and velocity of sound meter is characterized in that comprising:
First sound source is located at the gas pipeline inwall with known diameter, and this first sound source can be sent first voice signal;
First sound transducer is located at this inner-walls of duct, in order to receive voice signal;
Second sound sound sensor is located at this inner-walls of duct, in order to receive voice signal;
Wherein this second sound sound sensor, this first sound transducer and this first sound source are located at the relative both sides of this pipeline longitudinal section, and this second sound sound sensor and this first sound transducer are at a distance of a known distance;
The signal analysis collector, connect this first sound source, first sound transducer and second sound sound sensor, and the very first time that is received by this first sound transducer and this second sound sound sensor respectively according to this pipe diameter, this distance and this first voice signal and the velocity of sound in the second Time Calculation gas flow rate and the gas.
2. pipeline gas flow velocity as claimed in claim 1 and velocity of sound meter is characterized in that this first sound transducer is arranged in the upstream of this first sound source of pipeline, and this second sound sound sensor is arranged in the downstream of this first sound source of pipeline.
3. pipeline gas flow velocity as claimed in claim 1 and velocity of sound meter is characterized in that, distance equates between the distance between this first sound transducer and this first sound source and this second sound sound sensor and this first sound source.
4. pipeline gas flow velocity as claimed in claim 1 and velocity of sound meter is characterized in that, distance is unequal between the distance between this first sound transducer and this first sound source and this second sound sound sensor and this first sound source.
5. pipeline gas flow velocity as claimed in claim 1 and velocity of sound meter is characterized in that, also comprise:
Second sound source is located at this inner-walls of duct, and this second sound source can be sent second sound signal, and wherein this second sound source and this first sound source are located at the homonymy of this pipeline longitudinal section;
Wherein this signal analysis collector also connects this second sound source and the 3rd time that received by this first sound transducer and this second sound sound sensor respectively according to this second sound signal and the velocity of sound in the 4th Time Calculation gas flow rate and the gas.
6. pipeline gas flow velocity as claimed in claim 5 and velocity of sound meter is characterized in that, this first sound source and this first sound transducer are symmetrical arranged about pipe centerline, and this second sound source and this second sound sound sensor are symmetrical arranged about pipe centerline.
7. pipeline gas flow velocity as claimed in claim 5 and velocity of sound meter is characterized in that, this first voice signal and second sound signal that this first sound source and this second sound source are sent respectively are the high-frequency impulse crosstalks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201522136U CN201247251Y (en) | 2008-08-21 | 2008-08-21 | Measurement gauge for pipe gas flow rate and sonic velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201522136U CN201247251Y (en) | 2008-08-21 | 2008-08-21 | Measurement gauge for pipe gas flow rate and sonic velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247251Y true CN201247251Y (en) | 2009-05-27 |
Family
ID=40731070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201522136U Expired - Fee Related CN201247251Y (en) | 2008-08-21 | 2008-08-21 | Measurement gauge for pipe gas flow rate and sonic velocity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201247251Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769771B (en) * | 2010-01-29 | 2011-06-15 | 浙江大学 | Aeroacoustics principle-based flow rate measurement device and method thereof |
| CN102095889A (en) * | 2010-11-29 | 2011-06-15 | 河海大学常州校区 | Three-channel ultrasonic time difference method for measuring flow velocity |
| CN103994813A (en) * | 2014-04-28 | 2014-08-20 | 中国计量学院 | Small-diameter gas velocity measurement test device and test method thereof |
| CN104126027A (en) * | 2011-11-22 | 2014-10-29 | 英飞康公司 | Multi-chambered acoustic sensor for determining gas composition |
| CN103712652B (en) * | 2013-12-20 | 2017-04-12 | 华北电力大学 | Multi-physical field measuring method and device based on acoustic sensing technology |
| CN107085123A (en) * | 2017-03-24 | 2017-08-22 | 华北电力大学 | A kind of multipath pipe flow speed measurement apparatus and its method based on acoustic technique |
| WO2023088156A1 (en) * | 2021-11-22 | 2023-05-25 | 华为技术有限公司 | Sound velocity correction method and apparatus |
-
2008
- 2008-08-21 CN CNU2008201522136U patent/CN201247251Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769771B (en) * | 2010-01-29 | 2011-06-15 | 浙江大学 | Aeroacoustics principle-based flow rate measurement device and method thereof |
| CN102095889A (en) * | 2010-11-29 | 2011-06-15 | 河海大学常州校区 | Three-channel ultrasonic time difference method for measuring flow velocity |
| CN102095889B (en) * | 2010-11-29 | 2012-10-17 | 河海大学常州校区 | Three-channel ultrasonic time difference method for measuring flow velocity |
| CN104126027A (en) * | 2011-11-22 | 2014-10-29 | 英飞康公司 | Multi-chambered acoustic sensor for determining gas composition |
| CN103712652B (en) * | 2013-12-20 | 2017-04-12 | 华北电力大学 | Multi-physical field measuring method and device based on acoustic sensing technology |
| CN103994813A (en) * | 2014-04-28 | 2014-08-20 | 中国计量学院 | Small-diameter gas velocity measurement test device and test method thereof |
| CN107085123A (en) * | 2017-03-24 | 2017-08-22 | 华北电力大学 | A kind of multipath pipe flow speed measurement apparatus and its method based on acoustic technique |
| WO2023088156A1 (en) * | 2021-11-22 | 2023-05-25 | 华为技术有限公司 | Sound velocity correction method and apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201247251Y (en) | Measurement gauge for pipe gas flow rate and sonic velocity | |
| CN103245454B (en) | Non-intrusive pipeline real-time monitoring, prewarning and fault locating method | |
| CN100538307C (en) | A kind of wind tunnel calibration method for large flow gas pipeline averaging velocity tube flowmeter | |
| CN104501889B (en) | Ultrasonic flow detection method based on cross-correlation time difference method | |
| CN103439126B (en) | The experimental measurement method of Large Diameter Pipeline sound suppressor medium-high frequency acoustical behavior | |
| WO2018133494A1 (en) | Method of locating leak based on speed difference | |
| CN106289121B (en) | A kind of computational methods of the equivalent pipe range of reducer pipe | |
| CN109506729A (en) | A kind of biphase gas and liquid flow parameter online test method and device | |
| CN108931270B (en) | Two-phase flow parameter detection method based on porous throttling and acoustic emission technology | |
| CN102829829B (en) | A kind of Time-difference Ultrasonic Flow detection method and device | |
| CN100390510C (en) | Method for detecting active sound wave in supersonic flow field | |
| CN102914333B (en) | Detection method of using ultrasonic waves for flow detection | |
| CN105953080A (en) | Sound wave leakage positioning method based on same-side sensor arrangement | |
| CN111157065A (en) | Acoustic time delay measuring method in ultrasonic signal transmission loop of gas ultrasonic flowmeter | |
| CN201795821U (en) | Ultrasonic flowmeter | |
| CN105181038A (en) | Throttling device and throttling flowmeter | |
| o'Sullivan et al. | Ultrasonic measurement of gas flow using electrostatic transducers | |
| CN102829830B (en) | Method and the device of ultrasonic propagation velocity is detected in detecting for ultrasonic flow | |
| CN102680585B (en) | Ultrasonic detector based design method for water-logging probe water-spray coupling device | |
| CN112945326B (en) | Gas flow measuring device and method | |
| CN206291930U (en) | A kind of ultrasonic wave mass flowmenter | |
| CN102364308A (en) | Method and device for measuring mass flow of jet flow | |
| CN106768104A (en) | A kind of ultrasonic wave mass flowmenter | |
| CN206945090U (en) | Contain the latus rectum ultrasonic meter structure for dividing chamber dividing plate | |
| CN209446110U (en) | A kind of biphase gas and liquid flow parameter on-line measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20110821 |