CN201210067Y - Ultrasonic measurement construction for gas flow in tube with small diameter - Google Patents
Ultrasonic measurement construction for gas flow in tube with small diameter Download PDFInfo
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- CN201210067Y CN201210067Y CNU2008200804440U CN200820080444U CN201210067Y CN 201210067 Y CN201210067 Y CN 201210067Y CN U2008200804440 U CNU2008200804440 U CN U2008200804440U CN 200820080444 U CN200820080444 U CN 200820080444U CN 201210067 Y CN201210067 Y CN 201210067Y
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Abstract
The utility model discloses an ultrasonic measurement structure for the gas flow in a small diameter pipeline, which comprises a measurement flow channel and two ultrasound transducers which are respectively arranged at the front port and the rear port of the measurement flow channel. The ultrasonic measurement structure is characterized in that the measurement flow channel presents a rectangle or a regular polygon with 2n plus 2 sides; wherein, n is 2 at least; the ultrasound transducers separately arranged form oblique angles with the flow channel to transmit and receive obliquely; the sound channel comprises m ultrasonic reflective strokes; and m is 1 at least. The measurement accuracy is high. The utility model can effectively measure the flow velocities in different positions in the flow channel, and well reflect the average flow velocity, so that the measured velocity is closer to the actual flow velocity of the fluid in the flow channel.
Description
Technical field
The utility model relates to a kind of small-caliber pipeline gas flow ultrasonic measurement structure.
Background technology
Ultrasonic measurement generally is that the gas ultrasonic flowmeter is installed on the pipeline section that tested flowing gas passes through, launch and the reception ultrasonic signal by the ultrasonic transducer that front and back ends sets up separately, implement in the intended manner to handle calculating by signal processing unit, thereby derive the flow of tested flowing gas.
Existing ultrasonic time difference method is measured flow techniques dual mode: 1, run-in index correlation mode, as shown in Figure 2; 2, oblique angle type correlation mode, as shown in Figure 3.Because the mobility status more complicated of gas in pipeline, the velocity flow profile in runner is also inconsistent, and tube wall place flow velocity is zero, and runner center flow velocity is than the flow velocity height at tube wall place.Existing these two kinds of mean flow raties that the flow measurement mode is measured, all good changeable fluid state and flow velocity in the reacting pipe can cause flow rate measurements bigger deviation to occur.
As Fig. 2, shown in Figure 3, the used measurement pipeline of existing ultrasonic measurement all is a round pipe generally, and for the small size round pipe, the circular arc tube wall is bigger to the interference in ultrasound wave sound path and travel-time.In the line measurement mode, sound path and Measuring Time are short, cause the timing measuring precision low in addition.
Summary of the invention
The purpose of this utility model provides a kind of small-caliber pipeline gas flow ultrasonic measurement structure, can effectively overcome the deficiency of existing ultrasonic measurement technology.
For achieving the above object, the utility model is taked following design proposal:
A kind of small-caliber pipeline gas flow ultrasonic measurement structure comprises the ultrasonic transducer of measuring runner and setting up separately at its forward and backward port; Described measurement runner is rectangle or the regular polygon that 2n+2 limit arranged, and wherein n is at least 2; The ultrasonic transducer that sets up separately is the oblique angle with oblique emission and reception with runner respectively, comprises m time ultrasonic reflections stroke in the sound channel, and m is at least 1.
Ultrasound wave described in the utility model scheme is to refer in particular to frequency to arrive the 700KHz scope with interior sound wave at 150KHz; Described sound channel is meant the track of ultrasound wave acoustic wave energy propagation regions in measured fluid or the passage of propagation, is the Actual path of ultrasonic signal between two ultrasonic transducers that transmit and receive; Described runner is meant the pipeline that tested gas passes through.
The utility model has the advantages that: the measuring accuracy height, can effectively record the flow condition of diverse location in the runner, better reflect mean flow rate, make the speed that records more near the actual flow velocity of runner inner fluid.
Description of drawings
Fig. 1 is the structural representation of the utility model small-caliber pipeline gas flow ultrasonic measurement structure.
Fig. 2 is the round section pipeline structural representation of run-in index correlation in the prior art.
Fig. 3 is the round section pipeline structural representation of oblique angle type correlation in the prior art.
Fig. 4 is a prior art round section pipeline ultrasonic propagation synoptic diagram.
Fig. 5 is a pipeline ultrasonic propagation synoptic diagram in square-section of the present utility model.
Below in conjunction with drawings and the specific embodiments the utility model is described in further details:
Embodiment
Consult shown in Figure 1ly, the utility model small-caliber pipeline gas flow ultrasonic measurement structure is changed into rectangle with prior art round section pipeline or the regular polygon cross section pipeline of 2n+2 limit (n can be 2 to 10) is arranged; Set up ultrasonic transducer 11 and ultrasonic transducer 12 separately at the forward and backward port of measuring runner 10, and make ultrasonic transducer 11 and ultrasonic transducer 12 corresponding oblique emission and receptions, ultrasonic waves transmitted 13 after m time (m can be 1 to 5) reflects, be received the reception of end ultrasonic transducer.What the ultrasonic transducer that described forward and backward port sets up separately should be one group of correlation mode is good, and two probe sequential are successively distinguished correlation, and corresponding sound channel is a monophony correlation mode.
Sound channel can be determined in the position of given ultrasonic transducer, and the emission port of ultrasonic transducer and conduit axis angle theta scope exist in the utility model: 28 °～65 °.Make ultrasonic waves transmitted to realize total reflection through the tube wall of measuring channel.
The utility model small-caliber pipeline gas flow ultrasonic measurement structure realizes that the mode of ultrasonic measurement is the repeatedly correlation mode of total reflection of plane, and embodiment shown in Figure 1 provided the square-section pipeline, through the example of 3 total reflections.
The sound wave that plane total reflection mode has solved prior art is in reflection process, and the circular arc tube wall of small size round pipe is to the interference problem in ultrasound wave sound path and travel-time.The utility model design has prolonged the effective sound path and the Measuring Time of sound channel, helps reducing relatively the Measuring Time error introduced in the measuring process, thereby improves the timing measuring precision.
The comparison of the utility model and prior art:
Employed pipe diameter size is little in the metering of domestic gas ultrasonic flow rate, because of radius of circle in the round section pipeline xsect of prior art little, circular arc camber can not be similar to look does the plane, sound wave makes the sound path of acoustic beam diverse location change in curved surface repeatedly reflects, and influence and interference receiving end are to the measurement of ultrasonic propagation time.As Fig. 4.
As can be seen from Figure 4, t
3T
2=t
4T
1=t
5Circular arc camber makes ultrasonic beam at curved surface diverse location reflex time, and the sound path of sound wave each point changes, and wave beam reflects the path difference that will produce an action each time, will produce the receiving end of ultrasonic signal to disturb.
The utility model proposes rectangle (or regular polygon) cross section pipeline and replace the round section pipeline, as shown in Figure 5, replace circular arc camber, solved the existing problem of circular arc camber with the plane reflection face.
Among Fig. 5, t
1=t
2=t
3=t
4=t
5, signal arrives receiving end simultaneously.Avoided causing the generation of the phenomenon of received signal distortion because homogenous frequency signal arrives the asynchronism(-nization) of receiving transducer.
The flow condition of utilizing the new type section pipeline configuration of the utility model design and emission that ultrasonic beam repeatedly reflects and receive mode can effectively record diverse location in the runner makes the speed that records more near the actual flow velocity of gas in the runner.By the channel structure of illustrated repeatedly total reflection, can effectively record the flow condition of diverse location in the runner, better reflect mean flow rate, make the speed that records more near the actual flow velocity of runner inner fluid.
Claims (5)
1, a kind of small-caliber pipeline gas flow ultrasonic measurement structure comprises the ultrasonic transducer of measuring runner and setting up separately at its forward and backward port; It is characterized in that: described measurement runner is rectangle or the regular polygon that 2n+2 limit arranged, and wherein n is at least 2; The ultrasonic transducer that sets up separately is the oblique angle with oblique emission and reception with runner respectively, comprises m time ultrasonic reflections stroke in the sound channel, and m is at least 1.
2, small-caliber pipeline gas flow ultrasonic measurement structure according to claim 1, it is characterized in that: wherein n is 2 to 10.
3, small-caliber pipeline gas flow ultrasonic measurement structure according to claim 1, it is characterized in that: wherein m is 1 to 5.
4, small-caliber pipeline gas flow ultrasonic measurement structure according to claim 1, it is characterized in that: the ultrasonic transducer that described forward and backward port sets up separately is the ultrasonic transducer of one group of correlation mode, corresponding sound channel is a monophony.
5, small-caliber pipeline gas flow ultrasonic measurement structure according to claim 1, it is characterized in that: the emission port of described ultrasonic transducer and conduit axis angle theta scope exist: 28 °～65 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200804440U CN201210067Y (en) | 2008-05-08 | 2008-05-08 | Ultrasonic measurement construction for gas flow in tube with small diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200804440U CN201210067Y (en) | 2008-05-08 | 2008-05-08 | Ultrasonic measurement construction for gas flow in tube with small diameter |
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| CN201210067Y true CN201210067Y (en) | 2009-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200804440U Expired - Fee Related CN201210067Y (en) | 2008-05-08 | 2008-05-08 | Ultrasonic measurement construction for gas flow in tube with small diameter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322980A (en) * | 2011-09-02 | 2012-01-18 | 山东贝特智联表计有限公司 | Ultrasonic heat meter body and method for determining position parameters of three-dimensional reflection surfaces of ultrasonic heat meter body |
| WO2013185406A1 (en) * | 2012-06-13 | 2013-12-19 | 广州柏诚智能科技有限公司 | Ultrasonic flowmeter and ultrasonic flow measuring method |
| CN104729602A (en) * | 2013-12-19 | 2015-06-24 | 西克股份公司 | Ultrasonic measurement apparatus and method for determining a fluid velocity |
| CN105181997A (en) * | 2015-08-20 | 2015-12-23 | 天津市众中科技发展有限公司 | Non-contact ultrasonic flow velocity meter and non-contact flow velocity detection method |
| CN105277737A (en) * | 2015-11-30 | 2016-01-27 | 湖南赛能环保科技有限公司 | Ultrasonic wind meter |
| CN110617858A (en) * | 2019-09-24 | 2019-12-27 | 汇中仪表股份有限公司 | Ultrasonic sensor arrangement method for flow measurement |
| CN111398626A (en) * | 2019-12-31 | 2020-07-10 | 江苏启泰物联网科技有限公司 | Liquid flow rate monitoring method for railway |
| CN112162110A (en) * | 2020-09-22 | 2021-01-01 | 烟台南山学院 | Ultrasonic wind direction and speed instrument |
| CN113252936A (en) * | 2021-05-24 | 2021-08-13 | 国家海洋技术中心 | Miniaturized ultrasonic transducer anemometry array structure device |
| CN113932958A (en) * | 2021-10-25 | 2022-01-14 | 南京惟真智能管网科技研究院有限公司 | Pipeline stress nondestructive testing method and system based on ultrasound |
-
2008
- 2008-05-08 CN CNU2008200804440U patent/CN201210067Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322980A (en) * | 2011-09-02 | 2012-01-18 | 山东贝特智联表计有限公司 | Ultrasonic heat meter body and method for determining position parameters of three-dimensional reflection surfaces of ultrasonic heat meter body |
| WO2013185406A1 (en) * | 2012-06-13 | 2013-12-19 | 广州柏诚智能科技有限公司 | Ultrasonic flowmeter and ultrasonic flow measuring method |
| CN104729602A (en) * | 2013-12-19 | 2015-06-24 | 西克股份公司 | Ultrasonic measurement apparatus and method for determining a fluid velocity |
| CN105181997A (en) * | 2015-08-20 | 2015-12-23 | 天津市众中科技发展有限公司 | Non-contact ultrasonic flow velocity meter and non-contact flow velocity detection method |
| CN105277737A (en) * | 2015-11-30 | 2016-01-27 | 湖南赛能环保科技有限公司 | Ultrasonic wind meter |
| CN110617858A (en) * | 2019-09-24 | 2019-12-27 | 汇中仪表股份有限公司 | Ultrasonic sensor arrangement method for flow measurement |
| CN111398626A (en) * | 2019-12-31 | 2020-07-10 | 江苏启泰物联网科技有限公司 | Liquid flow rate monitoring method for railway |
| CN112162110A (en) * | 2020-09-22 | 2021-01-01 | 烟台南山学院 | Ultrasonic wind direction and speed instrument |
| CN113252936A (en) * | 2021-05-24 | 2021-08-13 | 国家海洋技术中心 | Miniaturized ultrasonic transducer anemometry array structure device |
| CN113252936B (en) * | 2021-05-24 | 2024-02-02 | 国家海洋技术中心 | Miniaturized ultrasonic transducer wind measurement array structure device |
| CN113932958A (en) * | 2021-10-25 | 2022-01-14 | 南京惟真智能管网科技研究院有限公司 | Pipeline stress nondestructive testing method and system based on ultrasound |
| CN113932958B (en) * | 2021-10-25 | 2024-03-01 | 南京惟真智能管网科技研究院有限公司 | Pipeline stress nondestructive testing method and system based on ultrasound |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20090318 Termination date: 20130508 |