CN102914333A - Detection method of using ultrasonic waves for flow detection - Google Patents
Detection method of using ultrasonic waves for flow detection Download PDFInfo
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- CN102914333A CN102914333A CN2012103747864A CN201210374786A CN102914333A CN 102914333 A CN102914333 A CN 102914333A CN 2012103747864 A CN2012103747864 A CN 2012103747864A CN 201210374786 A CN201210374786 A CN 201210374786A CN 102914333 A CN102914333 A CN 102914333A
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Abstract
The invention discloses a detection method of using ultrasonic waves for flow detection. The detection method includes: an ultrasonic transducer group arranged on a pipe section of a measuring pipe is used for measuring a down-flow time and a reverse-flow time when the ultrasonic waves are in down-flow transmission and reverse-flow transmission in the pipe section respectively; to-be-measured gas is diffused freely to two static speed pipes communicated with the measuring pipe when flowing through the pipe section of the measuring pipe provided with the ultrasonic transducer group, and the corresponding sound path is divided by the practical transmission time of the ultrasonic waves in the corresponding static speed pipe so that the transmission speed in each of the two static speed pipes can be obtained; the transmission speeds of the ultrasonic waves are substituted into an ultrasonic wave transmission speed computational formula so that the ultrasonic wave transmission speeds are obtained; and measured data are substituted into an equation to obtain the flow velocity of to-be-measured fluid in the measuring pipe, so that the flow of the to-be-measured fluid is obtained. The gas in the static speed pipes and the to-be-measured gas in the measuring pipe are guaranteed to be kept in the same state constantly by the aid of the detection method, and measuring accuracy degree is improved.
Description
Technical field
The invention belongs to the gas flow measurement technical field, be specifically related to a kind of detection method of utilizing the ultrasound examination 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 mutually alternately corresponding as radiated element with receive two ultrasonic transducers of original paper, the note mistiming is △ t, △ t=t
2-t
1, t wherein
2Be adverse current time, t
1Be the following current time, wherein,
Then obtain following equation:
△t＝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 △ 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 △ t and C
fGet final product, and △ 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) 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.。
Summary of the invention
The object of the present invention is to provide a kind of detection method of utilizing the ultrasound examination 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, the technical scheme of the detection method of ultrasound examination flow of utilizing provided by the present invention is: utilize the detection method of ultrasound examination flow, comprise 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 two that are connected with measuring tube quiet fast pipes, be furnished with respectively for the ultrasonic transducer of measuring ultrasonic propagation velocity at quiet fast pipe on these two the quiet fast pipes, layout according to the upper ultrasonic transducer of quiet speed pipe obtains the measurement sound path that ultrasound wave is propagated in the quiet fast pipe of correspondence, the length that on the two quiet fast pipes two are measured sound path differs 1 times, by the ultrasonic transducer on the quiet fast pipe of correspondence emission and receive ultrasound wave obtaining the actual propagation time of ultrasound wave in the measurement sound path of correspondence, can obtain respectively the velocity of propagation C of ultrasound wave in two quiet fast pipes by the measurement sound path of correspondence divided by the actual propagation time of ultrasound wave in the quiet fast pipe of correspondence
F1And C
F2, with above-mentioned ultrasonic propagation velocity C
F1And C
F2Bring in the following ultrasonic propagation velocity computing formula:
Can obtain the ultrasonic propagation velocity C of ultrasound wave in gas to be measured
f, k wherein
3Be penalty coefficient, its span is 0.9～1.1;
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,
△t=t
2-t
1 （3）
v′＝vf(θ) （4）
Wherein, S is the measurement 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 the ultrasonic transducer on described two quiet speed pipes or one of them quiet fast pipe is: the ultrasonic transducer on the 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 of the ultrasonic transducer on described two quiet speed pipes or one of them quiet fast pipe is: the ultrasonic transducer on the 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 mutual alternately as transmitting and receiving element.
The layout of the ultrasonic transducer on described two quiet speed pipes or one of them quiet fast pipe is: the ultrasonic transducer on the 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.
The invention has the beneficial effects as follows: in the Time-difference Ultrasonic Flow detection method provided by the present invention, make gas to be measured when flowing through the pipeline section of measuring tube free diffusing in two that are communicated with this pipeline section quiet fast pipes, because be free diffusing, there is not pressure reduction at two quiet fast Guan Zhongjun like this, during use, measure following current time and the adverse current time of ultrasound wave following current when propagating by being arranged in ultrasonic transducer group on the measuring tube, two quiet speed pipes are worked simultaneously when measuring, and the ultrasonic transducer on the two quiet fast pipes is corresponding measures hyperacoustic velocity of propagation C in the quiet fast pipe separately
F1And C
F2, then utilize the ultrasonic propagation velocity C that in two quiet fast pipes, records
F1And C
F2Carry out related operation, obtain final accurate higher ultrasonic propagation velocity C
f, then bring following current time, adverse current time and ultrasonic propagation velocity into calculate gas to be measured in the respective party formula flow velocity, and then obtain gas flow to be measured.Because the environmental factor of quiet speed pipe and measuring tube such as gas composition, temperature, pressure etc. are all consistent, can think the ultrasonic propagation velocity C that measurement calculates in quiet fast pipe
fBe the velocity of propagation under the gas static state to be measured of ultrasound wave in measuring tube, avoid gas composition to ultrasonic propagation velocity C
fMeasure the impact when calculating, save the compensation that to carry out carrying out for each environmental factor and calculate, realize the self compensation of time difference method ultrasound gas flow, so that can obtain fast, accurately ultrasonic propagation velocity C
f, after carrying it into corresponding computing formula, can accurately record the flow of gas to be measured.Detection method provided by the present invention realizes the online detection to ultrasonic propagation velocity, 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 the pick-up unit of the detection method for implementing the ultrasound examination flow provided by the present invention.
Embodiment
Utilize the embodiment of the detection method of ultrasound examination flow, 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 two that are connected with measuring tube quiet fast pipes, be furnished with respectively for the ultrasonic transducer of measuring ultrasonic propagation velocity at quiet fast pipe on these two the quiet fast pipes, layout according to the upper ultrasonic transducer of quiet speed pipe obtains the measurement sound path that ultrasound wave is propagated in the quiet fast pipe of correspondence, the length that on the two quiet fast pipes two are measured sound path differs 1 times, by the ultrasonic transducer on the quiet fast pipe of correspondence emission and receive ultrasound wave obtaining the actual propagation time of ultrasound wave in the measurement sound path of correspondence, can obtain respectively the velocity of propagation C of ultrasound wave in two quiet fast pipes by the measurement sound path of correspondence divided by the actual propagation time of ultrasound wave in the quiet fast pipe of correspondence
F1And C
F2, with above-mentioned ultrasonic propagation velocity C
F1And C
F2Bring in the following ultrasonic propagation velocity computing formula:
Can obtain the ultrasonic propagation velocity C of ultrasound wave in gas to be measured
f, k wherein
3Be penalty coefficient, its span is 0.9～1.1;
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,
△t=t
2-t
1 （3）
v′=vf(θ) （4）
Wherein, S is the measurement 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 each 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 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 flow rate testing methods is applicable to mine gas drainage pipeline and gas metering, also is applicable to the measurement of gas flow under other environment.
Measurement sound path in above-described embodiment refers to that ultrasound wave is sent by the ultrasonic transducer as radiated element, then by receive as the ultrasonic transducer of receiving element the distance of process.Measure sound path and determine that by the layout of the ultrasonic transducer in the quiet fast pipe ultrasonic transducer is being installed in quiet fast Guan Shanghou, the measurement sound path in this quiet fast pipe is determined value.
As shown in Figure 1, a kind of pick-up unit of the detection method for implementing to utilize the ultrasound examination flow comprises the measuring tube 2 of crossing for gas flow to be measured, 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 V-shaped reflection configuration of the ultrasonic transducer of two transceivers is along on the axial arranged measuring tube of measuring tube herein.Being fixed with two on the described measuring tube 2 is connected with pipeline section that measuring tube is provided with the ultrasonic transducer group, and the quiet speed pipe for the gas free diffusing to be measured in this pipeline section, the length of two quiet fast pipes differs twice, two quiet fast pipes are first quiet speed pipe the 3 and second quiet speed pipe 6, wherein, the first quiet speed pipe 3 is connected on the measuring tube by the first anemostat 5, and the first quiet fast pipe is connected with measuring tube by the first anemostat, and the second quiet speed pipe 6 is connected on the measuring tube by the second anemostat 8, and the second quiet fast pipe is connected with measuring tube by the second anemostat, the first anemostat herein and the second anemostat axially are furnished with two along quiet speed pipe respectively, and apart more closely to prevent gas pulsation occurring in the quiet fast pipe.Be furnished with in the quiet fast pipe of correspondence emission and receive ultrasound wave to be used for measuring the ultrasonic transducer 4 of ultrasonic propagation velocity at the first quiet speed pipe 3.And be furnished with in the quiet fast pipe of correspondence emission and receive ultrasound wave to be used for measuring the ultrasonic transducer 7 of ultrasonic propagation velocity at the second quiet speed pipe 6, ultrasonic transducer in two quiet fast pipes herein adopts identical arrangement: the ultrasonic transducer on the 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.Has the first measurement sound path that 4 layouts of the ultrasonic transducer in the quiet fast pipe are determined by this at the first quiet speed pipe 3, manage 6 in the second quiet speed and have the second measurement sound path that 7 layouts of the ultrasonic transducer in the quiet fast pipe are determined by this, the first length of measuring sound path and the second measurement sound path herein differs one times.
Measurement sound path in above-described embodiment refers to that ultrasound wave is sent by the ultrasonic transducer as radiated element, then by receive as the ultrasonic transducer of receiving element the distance of process.Measure sound path and determine that by the layout of the ultrasonic transducer in the quiet fast pipe ultrasonic transducer is being installed in quiet fast Guan Shanghou, the measurement sound path in this quiet fast pipe is determined value.
During measurement, behind the quiet speed pipe 3,6 of the gas free diffusing to two to be measured in the buret to be measured, the ultrasonic transducer in the two quiet fast pipes is started working, and then measurement calculates the ultrasonic propagation velocity C of two ultrasound waves in gas to be measured in two quiet fast pipes
F1And C
F2, with C
F1And C
F2Bring in the formula (1) in the above-mentioned detection method and obtain ultrasonic propagation velocity C
f, and then with C
fIn the corresponding calculation equation of substitution, can obtain the flow velocity of gas to be measured to be measured, and then record the flow of gas to be measured in measuring tube.
In above-described 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.
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 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.
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, 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 arrangement 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 arrangement: 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 arrangement 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.
Claims (4)
1. utilize the detection method of ultrasound examination flow, it is characterized in that, comprise 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 two that are connected with measuring tube quiet fast pipes, be furnished with respectively for the ultrasonic transducer of measuring ultrasonic propagation velocity at quiet fast pipe on these two the quiet fast pipes, layout according to the upper ultrasonic transducer of quiet speed pipe obtains the measurement sound path that ultrasound wave is propagated in the quiet fast pipe of correspondence, the length that on the two quiet fast pipes two are measured sound path differs 1 times, by the ultrasonic transducer on the quiet fast pipe of correspondence emission and receive ultrasound wave obtaining the actual propagation time of ultrasound wave in the measurement sound path of correspondence, can obtain respectively the velocity of propagation C of ultrasound wave in two quiet fast pipes by the measurement sound path of correspondence divided by the actual propagation time of ultrasound wave in the quiet fast pipe of correspondence
F1And C
F2, with above-mentioned ultrasonic propagation velocity C
F1And C
F2Bring in the following ultrasonic propagation velocity computing formula:
Can obtain the ultrasonic propagation velocity C of ultrasound wave in gas to be measured
f, k wherein
3Be penalty coefficient, its span is 0.9～1.1;
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,
△t＝t
2-t
1 （3）
v′＝vf(θ) （4）
Wherein, S is the measurement 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.
2. the detection method of utilizing the ultrasound examination flow according to claim 1, it is characterized in that, the layout of the ultrasonic transducer on described two quiet speed pipes or one of them quiet fast pipe is: the ultrasonic transducer on the 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.
3. the detection method of utilizing the ultrasound examination flow according to claim 1, it is characterized in that, the layout of the ultrasonic transducer on described two quiet speed pipes or one of them quiet fast pipe is: the ultrasonic transducer on the 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 mutual alternately as transmitting and receiving element.
4. the detection method of utilizing the ultrasound examination flow according to claim 1, it is characterized in that, the layout of the ultrasonic transducer on described two quiet speed pipes or one of them quiet fast pipe is: the ultrasonic transducer on the 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.
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| CN104061995A (en) * | 2014-07-09 | 2014-09-24 | 广东小天才科技有限公司 | Ultrasonic positioning calibration method and device |
| CN104713604A (en) * | 2015-04-10 | 2015-06-17 | 唐山唐仪科技有限公司 | Small-error grouping type ultrasonic flow measurement pipe section |
| 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 |
| CN108387278A (en) * | 2018-02-09 | 2018-08-10 | 杭州山科智能科技股份有限公司 | A kind of window time automatic adjusting method of ultrasound echo signal |
| CN114018349A (en) * | 2021-10-19 | 2022-02-08 | 苏州大学 | Gas flow measuring device, measuring system and measuring method based on ultrasonic waves |
| CN115950495A (en) * | 2023-02-09 | 2023-04-11 | 青岛鼎信通讯科技有限公司 | Ultrasonic water meter measuring frequency adjusting method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104061995A (en) * | 2014-07-09 | 2014-09-24 | 广东小天才科技有限公司 | Ultrasonic positioning calibration method and device |
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| 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 |
| CN108387278A (en) * | 2018-02-09 | 2018-08-10 | 杭州山科智能科技股份有限公司 | A kind of window time automatic adjusting method of ultrasound echo signal |
| CN114018349A (en) * | 2021-10-19 | 2022-02-08 | 苏州大学 | Gas flow measuring device, measuring system and measuring method based on ultrasonic waves |
| CN115950495A (en) * | 2023-02-09 | 2023-04-11 | 青岛鼎信通讯科技有限公司 | Ultrasonic water meter measuring frequency adjusting method |
| CN115950495B (en) * | 2023-02-09 | 2023-06-09 | 青岛鼎信通讯科技有限公司 | Ultrasonic water meter measurement frequency adjusting method |
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|---|---|
| CN102914333B (en) | 2014-10-22 |
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