CN202710116U - Device for detecting ultrasonic wave flow - Google Patents
Device for detecting ultrasonic wave flow Download PDFInfo
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- CN202710116U CN202710116U CN201220425557.6U CN201220425557U CN202710116U CN 202710116 U CN202710116 U CN 202710116U CN 201220425557 U CN201220425557 U CN 201220425557U CN 202710116 U CN202710116 U CN 202710116U
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- ultrasonic
- measuring tube
- quiet
- ultrasonic transducer
- pipe
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Abstract
The utility model discloses a device for detecting ultrasonic wave flow. An ultrasonic transducer assembly used for detecting downstream time and counterstream time is arranged on a tube section of a measuring tube, the ultrasonic transducer assembly comprises two transmission and reception integrated ultrasonic transducers which serve as a transmission element and a reception element alternatively and correspondingly, and the ultrasonic transducers which are in a correlation structure intersected with a measuring tube shaft and are inclined to the axial direction of the measuring tube shaft or in a V-shaped reflection structure are arranged on the tube section of the measuring tube along the axial direction of the measuring tube. The measuring tube is fixedly connected with a static speed container which is communicated with the tube section provided with the ultrasonic transducer assembly on the measuring tube and used for free diffusion of a gas to be measured in the tube section, the static speed container is provided with the ultrasonic transducers used for transmitting and receiving ultrasonic waves to measure propagation velocity of the ultrasonic waves. The environmental factors like gas components, temperature and pressure are in accordance with those of the measuring tube, effects like the gas components, the temperature and the pressure are eliminated through a direct measurement of the propagation velocity of the ultrasonic waves in the static speed container.
Description
Technical field
The utility model belongs to the gas flow measurement technical field, is specifically related to a kind of device for detecting ultrasonic wave flow.
Background technology
The measuring ultrasonic wave flow technology be a kind of when utilizing ultrasonic signal in fluid, to propagate the flow rate information of fluid measure the measuring technique of fluid flow, it has the characteristics such as non-contact measurement, measuring accuracy is high, measurement range is wide, convenient for installation and maintenance.According to the principle to input, the Time-difference Ultrasonic Flow pick-up unit is broadly divided into the types such as time difference method, frequency-difference method, wave beam deflection method, Doppler method, wherein most widely used flow detector based on time difference method at present.
In fact, because ultrasonic signal is compared with static medium in fluid media (medium), the velocity of propagation of ultrasonic signal increases during following current, travel-time reduces, the velocity of propagation of ultrasonic signal reduces during adverse current, travel-time increases, thereby so that the travel-time life period of concurrent-countercurrent direction ultrasonic signal is poor.And transit time ultrasonic flow meters exists the linear dependence principle to measure according to flow velocity and mistiming of fluid media (medium), therefore as long as Accurate Determining following current time and adverse current time, flow velocity and the linear dependence of following current time and adverse current time according to fluid media (medium), can obtain the flow velocity of fluid media (medium), and then obtain the flow of gas to be measured.As being to disclose a kind of transit time ultrasonic flow meters in the Chinese invention patent application of CN101886939A at application publication number, this ultrasonic flow meter comprises measuring tube, on the pipeline section of measuring tube along measuring tube axially and be the correlation structure fabric and be equipped with two transceivers and alternately corresponding as radiated element with receive two ultrasonic transducers of original paper, the note mistiming is Δ t, Δ t=t
2-t
1, t wherein
2Be adverse current time, t
1Be the following current time, wherein,
Then obtain following equation:
Δt＝t
2-t
1 （2）
v′＝vf(θ) （3）
Wherein, τ represents the time delay of ultrasonic signal in ultrasonic transducer and circuit, t
2-t
1Can eliminate the impact of τ, S is according to the measured propagation sound path that obtains of the layout of ultrasonic transducer group in the device for detecting ultrasonic wave flow, C
fBe the velocity of propagation of ultrasound wave in fluid media (medium), θ is the sound channel angle, and v is the flow velocity of fluid media (medium), and v ' then is the component velocity of flow velocity on the ultrasonic propagation direction of fluid media (medium), and f (θ) is trigonometric function.For aforesaid equation (1) and (2), the flow velocity v of fluid media (medium) and Δ t, S, C
f, and f (θ) relevant, wherein S and f (θ) just can directly measure in the certain situation of structure of ultrasonic flowmeter, only need to measure calculating Δ t and C
fGet final product, and Δ t can pass through t
2-t
1Measurement calculates, and only has C
fNeeding compensation to calculate just can obtain.
Ultrasonic transducer on the measuring tube of the device for detecting ultrasonic wave flow that adopts in the above-mentioned patent documents of quoting is the correlation structural arrangement that intersects with the measuring tube axioversion, and when actual measurement, the all right V-shaped reflection configuration of ultrasonic transducer on the measuring tube is and axial arranged along measuring tube, and this all is time difference method ultrasonic measurement field arrangement form commonly used in the prior art.And calculate following current time and adverse current during the time, at formula when adopting other arrangement forms
And
In that change is exactly the component velocity v ' of flow velocity on the ultrasonic propagation direction of sound path S and fluid media (medium), and sound path S and f (θ) all can directly measure according to concrete arrangement form.So no matter adopt which kind of arrangement form, finally also need to determine the velocity of propagation C of ultrasound wave in fluid media (medium)
f
And the velocity of propagation C of ultrasound wave in fluid media (medium)
fUltrasonic velocity is subject to the impact of various environmental factors, comprises gas composition to be measured, temperature, pressure etc., and in common environmental factor, temperature is the most serious on the impact of ultrasonic velocity, and pressure also has important impact to ultrasonic velocity.So must carry out various compensation calculates just can draw and calculates the velocity of propagation C of ultrasound wave in fluid media (medium)
f, such as, in air, temperature can be according to formula c on the impact of ultrasonic velocity
Air=331.45+0.61t(t Celsius temperature) calculate, and pressure can be according to formula on the impact of the velocity of sound
(v is the speed of sound wave in gas to be measured, and k is gas coefficient of heat insulation to be measured, and p is gas pressure intensity to be measured, and ρ is gas density to be measured) weighed.And gas composition to be measured is to the velocity of propagation C of ultrasound wave in fluid media (medium)
fImpact only also can't realize by ultrasonic flow device self at present, can only solve and pipeline gas composition to be measured changes by on-site proving, the ultrasonic flow device is realized that Measurement accuracy has brought very large difficulty.
The utility model content
The purpose of this utility model is to provide a kind of device for detecting ultrasonic wave flow, just can draw real ultrasound wave velocity of propagation C in fluid media (medium) need to compensate calculating for various environmental factors in the solution prior art
fAnd affect the technical matters of measuring accuracy.
For achieving the above object, device for detecting ultrasonic wave flow provided by the utility model adopts following technical scheme: a kind of device for detecting ultrasonic wave flow, comprise measuring tube, be furnished with for measuring the following current time of ultrasound wave when gas following current to be measured is propagated and the ultrasonic transducer group of the adverse current time of adverse current when propagating at the pipeline section of measuring tube, this ultrasonic transducer group comprises two transceivers, and alternately corresponding conduct transmits and receives the ultrasonic transducer of element, described two ultrasonic transducers are the correlation structure or the V-shaped reflection configuration that intersect with the measuring tube axioversion and are disposed axially on the pipeline section of measuring tube along measuring tube, be fixed with on the described measuring tube with pipeline section that measuring tube is provided with the ultrasonic transducer group and be connected, and for the quiet fast container of the gas free diffusing to be measured in this pipeline section, be furnished with in the quiet fast container emission and receive ultrasound wave to be used for measuring the ultrasonic transducer of ultrasonic propagation velocity at quiet fast container.
Two ultrasonic transducers arranging at V-shaped reflection configuration on the described measuring tube also are furnished with the ultrasonic transducer as receiving element over against side center position place.
Described quiet fast container is connected with measuring tube by anemostat, and described anemostat is connected with the pipeline section that described measuring tube is provided with the ultrasonic transducer group.
Described quiet fast container is quiet speed pipe, and the ultrasonic transducer on this quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and one of them in two ultrasonic transducers on the described quiet fast pipe is radiated element, another is receiving element.
Described quiet fast container is quiet speed pipe, and the ultrasonic transducer on this quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and two ultrasonic transducers on the described quiet fast pipe are transceiver structure and alternately corresponding to transmitting and receiving element.
Described quiet fast container is quiet speed pipe, and the ultrasonic transducer on this quiet fast pipe is the transceiver structure, also is furnished with on quiet fast pipe for returning from the ultrasonic reflections that ultrasonic transducer is launched the reflecting part of ultrasonic transducer.
The ultrasonic transducer that is the transceiver structure on the described quiet fast pipe is arranged in the axial end of quiet speed pipe, and described reflecting part is arranged in the axial other end of quiet speed pipe.
The beneficial effects of the utility model are: device for detecting ultrasonic wave flow provided by the utility model, at the quiet speed appearance container that is communicated with the gas free diffusing to be measured that supplies in this pipeline section on the measuring tube in the pipeline section that is provided with ultrasonic wave transducer container group, in quiet fast pipe, be furnished with for the ultrasonic wave transducer container of measuring ultrasonic propagation velocity, during use, measure following current time and the adverse current time of ultrasound wave following current when propagating by being arranged in ultrasonic wave transducer container group on the measuring tube, and measurement calculates the velocity of propagation of ultrasound wave in the gas to be measured of quiet speed appearance container in quiet speed appearance container, then with the following current time, adverse current time and ultrasonic propagation velocity are brought the flow velocity that calculates gas to be measured in the respective party formula into, and then obtain gas flow to be measured.In the pick-up unit provided by the utility model, be provided with quiet speed pipe at measuring tube, during measurement, gas free diffusing to be measured in the measuring tube is in quiet fast pipe, the quiet speed residing environmental factor of pipe such as gas composition, temperature, the factors such as pressure are consistent with environmental factor in the measuring tube, the measured ultrasonic propagation velocity that calculates is the velocity of propagation in the gas of ultrasound wave at measuring tube in quiet fast pipe, eliminate gas composition by directly measuring the velocity of propagation of ultrasound wave in gas to be measured at quiet speed pipe like this, temperature, the impact of the factors such as pressure, realize self-compensating function, save the various compensation that need in the prior art to consider various environmental factors and do and calculate.Structure of the detecting device provided by the utility model is realized the online detection to ultrasonic propagation velocity, guarantee that gas and the gas to be measured in the measuring tube in the quiet fast pipe are under the same state all the time, improve the accuracy of measuring, the measurement of being convenient to use the gas flow under the various environment.
Description of drawings
Fig. 1 is the structural representation of device for detecting ultrasonic wave flow provided by the utility model.
Embodiment
A kind of embodiment of Time-difference Ultrasonic Flow detection method, the detection method among this embodiment comprises the steps:
1., when gas flow to be measured is crossed measuring tube, measure the following current time t of ultrasound wave following current in pipeline section when propagating by the ultrasonic transducer group on the pipeline section that is arranged in measuring tube
1Adverse current time t when reaching the adverse current propagation
2Gas to be measured flow through measuring tube be furnished with the pipeline section of ultrasonic transducer group the time free diffusing in quiet fast pipe, be furnished with in the quiet fast pipe emission on this quiet fast pipe and receive hyperacoustic ultrasonic transducer, layout according to the upper ultrasonic transducer of quiet speed pipe obtains the sound path that ultrasound wave is propagated in quiet fast pipe, by the ultrasonic transducer in quiet fast pipe emission and receive ultrasound wave to obtain the actual propagation time of ultrasound wave in sound path, can obtain ultrasonic propagation velocity C by sound path divided by the actual propagation time of ultrasound wave in quiet fast pipe
f
2., with t measured in the step 1
1, t
2, C
fIn the hope for the treatment of the flow velocity v of fluid measured in measuring tube, and then obtain treating the flow of fluid measured in the following equation of substitution,
Δt=t
2-t
1 （2）
v′=vf(θ) （3）
Wherein, S is the sound path that ultrasound wave is propagated in measuring tube, v ' then is the component velocity of flow velocity v on the ultrasonic propagation direction of fluid media (medium), and f (θ) is trigonometric function, and S and f (θ) all obtain according to the layout of ultrasonic transducer group in the measuring tube.
The layout of quiet fast pipe can according to the actual conditions setting, for example can adopt following three kinds of distribution forms in the above-mentioned detection method:
The layout 1 of the ultrasonic transducer on the quiet fast pipe is: the ultrasonic transducer on the described quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and one of them in two ultrasonic transducers on the described quiet fast pipe is radiated element, another is receiving element.
The layout 2 of the ultrasonic transducer on the quiet fast pipe is: the ultrasonic transducer on the described quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and two ultrasonic transducers on the described quiet fast pipe are transceiver structure and alternately corresponding to transmitting and receiving element.
The layout 3 of the ultrasonic transducer on the quiet fast pipe is: the ultrasonic transducer on the described quiet fast pipe is the transceiver structure, the ultrasonic transducer that is the transceiver structure on the described quiet fast pipe is arranged in the axial end of quiet speed pipe, is furnished with hyperacoustic reflecting part of launching from ultrasonic transducer for reflection at the axial other end of quiet speed pipe.
In the above-mentioned layout of enumerating 1 and layout 2, ultrasonic transducer on the quiet fast pipe all adopts the correlation structure, in other embodiments, ultrasonic transducer on the quiet fast pipe can also adopt V-type reflection configuration layout or other layouts, as long as can measure sound path and the travel-time of ultrasound wave in quiet fast pipe.
In addition, in above-mentioned detection method, the actual propagation time of ultrasound wave in quiet fast pipe is obtained by the ultrasound wave that measures radiated element and the time delay that deducts in metering circuit travel-time between the receiving element in quiet fast pipe.
Above-mentioned Time-difference Ultrasonic Flow detection method is applicable to mine gas drainage pipeline and gas metering, also is applicable to the measurement of gas flow under other environment.
Below in conjunction with the device of accompanying drawing introduction for the enforcement said method,
As shown in Figure 1, a kind of embodiment of the device for detecting ultrasonic wave flow for implementing the Time-difference Ultrasonic Flow detection method, pick-up unit among this embodiment comprises measuring tube 2, be furnished with for measuring the following current time of ultrasound wave when gas following current to be measured is propagated and the ultrasonic transducer group of the adverse current time of adverse current when propagating at the pipeline section of measuring tube 2, this ultrasonic transducer group comprises two transceivers, and alternately corresponding conduct transmits and receives the ultrasonic transducer 1 of element, and the ultrasonic transducer 1 V-shaped reflection configuration of two transceivers is along on the axial arranged measuring tube of measuring tube herein.Be fixed with on the described measuring tube 2 and be connected with pipeline section that measuring tube is provided with the ultrasonic transducer group and for the quiet speed pipe 3 of the gas free diffusing to be measured in this pipeline section, quiet speed pipe 3 is connected on the measuring tube 2 by anemostat 5, and quiet speed pipe 3 is connected with the pipeline section that the ultrasonic transducer group is installed of measuring tube by anemostat, anemostat herein axially is furnished with two along quiet speed pipe, and these two anemostats are apart more closely to prevent gas pulsation occurring in the quiet fast pipe.Be furnished with in the quiet fast pipe emission and receive ultrasound wave to be used for measuring ultrasonic propagation velocity C at quiet speed pipe 3
fUltrasonic transducer 4.The layout of the ultrasonic transducer in the quiet fast pipe herein is: the ultrasonic transducer 4 on the described quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and one of them in two ultrasonic transducers on the described quiet fast pipe is radiated element, another is receiving element.
In above-described embodiment, quiet fast container adopts measuring tube, and in other embodiments, quiet fast container also can adopt other version such as body structure.
In above-described embodiment, two ultrasonic transducers in the ultrasonic transducer group in the measuring tube are 45 ° of V-types and arrange, in other embodiments, the V-type that also can be other angles is arranged, as long as can record corresponding hyperacoustic following current time and adverse current time.Perhaps can also be on measuring tube be that the ultrasonic reflections position is furnished with the ultrasonic sensor as receiving element in the ultrasonic transducer of two V-shaped layouts over against side center position place, this form at three ultrasonic transducers of measuring tube layout can be eliminated whole ultrasonic detection device and install the time delay of bringing because of self, can farthest improve following current time and adverse current measurement of time precision.
In above-described embodiment, the V-shaped reflection configuration of two ultrasonic transducers in the ultrasonic transducer group in the measuring tube is arranged, in other embodiments, also can adopt the arrangement form that is the correlation structure that intersects with the measuring tube axioversion of the prior art, can not affect its measurement result.
In above-described embodiment, the layout of the ultrasonic transducer on the quiet fast pipe can also be furnished with two at the axial two ends of quiet speed pipe for: the ultrasonic transducer on the described quiet fast pipe, and two ultrasonic transducers on the described quiet fast pipe are transceiver structure and alternately corresponding to transmitting and receiving element.
Perhaps adopt following layout: the ultrasonic transducer on the described quiet fast pipe is the transceiver structure, the ultrasonic transducer that is the transceiver structure on the described quiet fast pipe is arranged in the axial end of quiet speed pipe, is furnished with hyperacoustic reflecting part of launching from ultrasonic transducer for reflection at the axial other end of quiet speed pipe.
In the above-mentioned layout of enumerating, ultrasonic transducer on the quiet fast pipe all adopts the correlation structure, in other embodiments, ultrasonic transducer on the quiet fast pipe can also adopt V-type reflection configuration layout or other layouts, as long as can measure sound path and the travel-time of ultrasound wave in quiet fast pipe.
Direct measurement when the method and apparatus of measurement ultrasonic propagation velocity provided by the utility model has realized that ultrasound wave is propagated in tested gas has guaranteed the accuracy of the measured velocity of sound by quiet fast pipe, measuring method and install simple and reliable.
Claims (7)
1. device for detecting ultrasonic wave flow, comprise measuring tube, be furnished with for measuring the following current time of ultrasound wave when gas following current to be measured is propagated and the ultrasonic transducer group of the adverse current time of adverse current when propagating at the pipeline section of measuring tube, this ultrasonic transducer group comprises two transceivers, and alternately corresponding conduct transmits and receives the ultrasonic transducer of element, described two ultrasonic transducers are the correlation structure or the V-shaped reflection configuration that intersect with the measuring tube axioversion and are disposed axially on the pipeline section of measuring tube along measuring tube, it is characterized in that, be fixed with on the described measuring tube with pipeline section that measuring tube is provided with the ultrasonic transducer group and be connected, and for the quiet fast container of the gas free diffusing to be measured in this pipeline section, be furnished with in the quiet fast container emission and receive ultrasound wave to be used for measuring the ultrasonic transducer of ultrasonic propagation velocity at quiet fast container.
2. device for detecting ultrasonic wave flow according to claim 1 is characterized in that, two ultrasonic transducers arranging at V-shaped reflection configuration on the described measuring tube also are furnished with the ultrasonic transducer as receiving element over against side center position place.
3. device for detecting ultrasonic wave flow according to claim 1 is characterized in that, described quiet fast container is connected with measuring tube by anemostat, and described anemostat is connected with the pipeline section that described measuring tube is provided with the ultrasonic transducer group.
4. according to claim 1 and 2 or 3 described device for detecting ultrasonic wave flows, it is characterized in that, described quiet fast container is quiet speed pipe, ultrasonic transducer on this quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and one of them in two ultrasonic transducers on the described quiet fast pipe is radiated element, another is receiving element.
5. according to claim 1 and 2 or 3 described device for detecting ultrasonic wave flows, it is characterized in that, described quiet fast container is quiet speed pipe, ultrasonic transducer on this quiet fast pipe is furnished with two at the axial two ends of quiet speed pipe, and two ultrasonic transducers on the described quiet fast pipe are transceiver structure and alternately corresponding to transmitting and receiving element.
6. according to claim 1 and 2 or 3 described device for detecting ultrasonic wave flows, it is characterized in that, described quiet fast container is quiet speed pipe, ultrasonic transducer on this quiet fast pipe is the transceiver structure, also is furnished with on quiet fast pipe for returning from the ultrasonic reflections that ultrasonic transducer is launched the reflecting part of ultrasonic transducer.
7. device for detecting ultrasonic wave flow according to claim 6 is characterized in that, the ultrasonic transducer that is the transceiver structure on the described quiet fast pipe is arranged in the axial end of quiet speed pipe, and described reflecting part is arranged in the axial other end of quiet speed pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220425557.6U CN202710116U (en) | 2012-08-23 | 2012-08-23 | Device for detecting ultrasonic wave flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220425557.6U CN202710116U (en) | 2012-08-23 | 2012-08-23 | Device for detecting ultrasonic wave flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710116U true CN202710116U (en) | 2013-01-30 |
Family
ID=47590407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220425557.6U Expired - Lifetime CN202710116U (en) | 2012-08-23 | 2012-08-23 | Device for detecting ultrasonic wave flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202710116U (en) |
-
2012
- 2012-08-23 CN CN201220425557.6U patent/CN202710116U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: GLTECH Co.,Ltd. Address before: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee before: ZHEJIANG GUANGLI TECH DEVELOPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
|
| CX01 | Expiry of patent term |