CN202869637U - Device for detecting supersonic wave transmission speed of supersonic wave flow detection - Google Patents
Device for detecting supersonic wave transmission speed of supersonic wave flow detection Download PDFInfo
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- CN202869637U CN202869637U CN201220423254.0U CN201220423254U CN202869637U CN 202869637 U CN202869637 U CN 202869637U CN 201220423254 U CN201220423254 U CN 201220423254U CN 202869637 U CN202869637 U CN 202869637U
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- ultrasonic transducer
- supersonic wave
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Abstract
The present utility model discloses a device for detecting supersonic wave transmission speed of supersonic wave flow detection. The device comprises a static speed tube which is fixedly connected on a measuring tube used in time difference method supersonic wave flow detection when in use, connected with a pipe segment of the measuring tube provided with an ultrasonic transducer set and used for freely scattering to-be-detected gas passing through the pipe segment, and an ultrasonic transducer arranged on the static speed tube and used for emitting and receiving supersonic wave to/from the static speed tube to measure the supersonic wave transmission speed. Environment factors of the static speed tube, such as gas components, temperature, and pressure are consistent with environment factors of the measuring tube, supersonic wave transmission speed measured and calculated in the static speed tube is the transmission speed of supersonic wave in gas of the measuring tube, the transmission speed of the supersonic wave in to-be-detected gas is directly measured in the static speed tube to eliminate influences of gas components, temperature, pressure and other factors, and on-line detection of the supersonic wave transmission speed can be realized.
Description
Technical field
The utility model belongs to the gas flow measurement technical field, is specifically related to a kind of for detect the online device that detects ultrasonic velocity at Time-difference Ultrasonic 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 time difference ultrasonic flowmeter 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 time difference ultrasonic flowmeter in the Chinese utility model patent application of CN101886939A at application publication number, this ultrasonic flowmeter 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 mutually 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, and when actual measurement, the all right V-shaped reflection configuration of ultrasonic transducer on the measuring tube or other structural arrangement, 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) calculates, 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 and detects the device of ultrasonic propagation velocity for ultrasonic flow, need to compensate calculating for various environmental factors and just can draw real ultrasound wave velocity of propagation and affect the technical matters of measuring accuracy in fluid media (medium) to solve in the prior art.
For achieving the above object, device for ultrasonic flow detection ultrasonic propagation velocity provided by the utility model adopts following technical scheme: a kind of device that detects ultrasonic propagation velocity for ultrasonic flow, comprise on the measuring tube used during being connected in Time-difference Ultrasonic Flow when using detects, and be connected with the pipeline section that is furnished with the ultrasonic transducer group of measuring tube for the quiet speed pipe of the gas free diffusing to be measured that flows through in this pipeline section, be furnished with in the quiet fast pipe emission and receive ultrasound wave to be used for measuring the ultrasonic transducer of ultrasonic propagation velocity at quiet fast pipe.
Described quiet fast pipe 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.
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 in the described quiet fast pipe is radiated element, another is receiving element.
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 in the described quiet fast pipe are transceiver structure and mutually alternately corresponding to transmitting and receiving element.
Ultrasonic transducer on the described quiet fast pipe is the transceiver structure, the ultrasonic transducer that is the transceiver structure in 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.
The beneficial effects of the utility model are: in the device for ultrasonic flow detection ultrasonic propagation velocity provided by the utility model, quiet fast pipe is connected on the measuring tube, and so that the pipeline section of ultrasonic transducer group be installed on quiet speed pipe and the measuring tube be connected, during measurement, gas free diffusing to be measured in the pipeline section of 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.The device of detection ultrasonic propagation velocity provided by the utility model has been realized online detection, guarantees that gas and the gas to be measured in the measuring tube in the quiet fast pipe is under the same state all the time, improves the accuracy of measuring.
Description of drawings
Fig. 1 is the structural representation of Time-difference Ultrasonic Flow pick-up unit 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 following current time t1 and adverse current the adverse current time t when propagating 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
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.
In said method, also provide simultaneously a kind of and detected the online method that detects ultrasonic propagation velocity for Time-difference Ultrasonic Flow, comprised the steps:
1., used measuring tube is communicated with quiet speed pipe in Time-difference Ultrasonic Flow detects, make gas 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;
2., the 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
The layout of quiet fast pipe can according to the actual conditions setting, for example can adopt following three kinds of distribution forms in above-mentioned two detection methods:
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 mutually 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.
The device that is used for implementing above-mentioned two kinds of methods below in conjunction with the accompanying drawing introduction.
As shown in Figure 1, a kind of embodiment of the Time-difference Ultrasonic Flow pick-up unit 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 the ultrasonic transducer 4 of ultrasonic propagation velocity at quiet speed pipe 3.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.
Simultaneously, a kind of embodiment that detects the device of ultrasonic propagation velocity for ultrasonic flow is also disclosed in Fig. 1, device among this embodiment is connected in when comprising use on the measuring tube 2 used in the Time-difference Ultrasonic Flow detection, and be connected with the pipeline section that is furnished with the ultrasonic transducer group of measuring tube for the quiet speed pipe 3 of the gas free diffusing to be measured that flows through in this pipeline section, quiet speed pipe 3 is connected on the measuring tube 2 by anemostat 5, and quiet fast pipe 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 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.
Among above-mentioned two embodiment, two ultrasonic transducers in the ultrasonic transducer group in the measuring tube are 45 ° of V-types to be arranged, in other embodiments, the V-type that also can be other angles is arranged.Perhaps adopt such as other layout structures such as Z-type or X-types, 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.
Among above-mentioned two 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.
Among above-mentioned two 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 four ultrasonic transducers of X-type two-channel layout of the prior art.Four ultrasonic transducers that are the X-type layout on the measuring tube are the transceiver structure, because four ultrasonic transducers form two and measure sound channel, like this for each sound channel, as long as a radiated element and a receiving element are arranged, certainly, four ultrasonic transducers can be separately radiated element or receiving element also, only otherwise following current time and the adverse current time of impact when measuring ultrasound wave and in the fluid of measuring tube, propagating get final product.
Among above-mentioned two 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 mutually 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 (5)
1. be used for the device that ultrasonic flow detects ultrasonic propagation velocity, it is characterized in that, comprising being connected on the measuring tube used during being connected in Time-difference Ultrasonic Flow when using detects and with the pipeline section that is furnished with the ultrasonic transducer group of measuring tube for the quiet speed pipe of the gas free diffusing to be measured that flows through in this pipeline section, being furnished with in the quiet fast pipe emission and receiving ultrasound wave to be used for measuring the ultrasonic transducer of ultrasonic propagation velocity at quiet fast pipe.
2. the device that detect to detect ultrasonic propagation velocity for ultrasonic flow according to claim 1, it is characterized in that, described quiet fast pipe 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.
3. the device that detect to detect ultrasonic propagation velocity for ultrasonic flow according to claim 1 and 2, it is characterized in that, 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 in the described quiet fast pipe is radiated element, another is receiving element.
4. the device that detect to detect ultrasonic propagation velocity for ultrasonic flow according to claim 1 and 2, it is characterized in that, 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 in the described quiet fast pipe are transceiver structure and mutually alternately corresponding to transmitting and receiving element.
5. the device that detect to detect ultrasonic propagation velocity for ultrasonic flow according to claim 1 and 2, it is characterized in that, ultrasonic transducer on the described quiet fast pipe is the transceiver structure, the ultrasonic transducer that is the transceiver structure in 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220423254.0U CN202869637U (en) | 2012-08-23 | 2012-08-23 | Device for detecting supersonic wave transmission speed of supersonic wave flow detection |
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|---|---|---|---|
| CN201220423254.0U CN202869637U (en) | 2012-08-23 | 2012-08-23 | Device for detecting supersonic wave transmission speed of supersonic wave flow detection |
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|---|---|
| CN202869637U true CN202869637U (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007549A (en) * | 2017-12-14 | 2018-05-08 | 济南希声计量技术有限公司 | The device and its application process of the static velocity of sound of measurement in real time in flow media environment |
-
2012
- 2012-08-23 CN CN201220423254.0U patent/CN202869637U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007549A (en) * | 2017-12-14 | 2018-05-08 | 济南希声计量技术有限公司 | The device and its application process of the static velocity of sound of measurement in real time in flow media environment |
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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: 20130410 |
|
| CX01 | Expiry of patent term |