CN203502065U - Ultrasonic flow sensor - Google Patents
Ultrasonic flow sensor Download PDFInfo
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- CN203502065U CN203502065U CN201320630921.7U CN201320630921U CN203502065U CN 203502065 U CN203502065 U CN 203502065U CN 201320630921 U CN201320630921 U CN 201320630921U CN 203502065 U CN203502065 U CN 203502065U
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- 230000003071 parasitic effect Effects 0.000 claims abstract description 17
- 238000002604 ultrasonography Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model relates to an ultrasonic flow sensor. The ultrasonic flow sensor comprises a flow cavity (20) which is provided with an inlet (21) and an outlet (22). A first electronic ultrasonic transducer (40) and a first ultrasonic reflector (50) are arranged at the inlet end of the flow cavity (20), and a second electronic ultrasonic transducer (41) and a second ultrasonic reflector (51) are arranged at the outlet end of the flow cavity (20). The ultrasonic sent by the first electronic ultrasonic transducer (40) passes through the first ultrasonic reflector (50), an inner flow pipeline (30) and the second ultrasonic reflector (51) in sequence and then is received by the second electronic ultrasonic transducer (41), and the inner flow pipeline (30) is provided with a gear-shaped inner surface (31) capable of eliminating parasitic multimode dispersed beams. Due to the fact that the gear-shaped inner surface capable of eliminating the parasitic multimode dispersed beams are arranged inside the inner flow pipeline, parasitic multimode ultrasonic is restrained, and the measuring precision and reliability are greatly increased.
Description
Technical field
The utility model relates to a kind of ultrasonic flow sensor, especially relates to a kind of for measuring the ultrasonic flow sensor of liquids and gases medium mean flow rate.
Background technology
Ultrasonic flow sensor is to rely on ultrasonic transducer, it launches based on transducer transmitter the delivery time that ultrasound wave is sent to corresponding receiver, the principle that depends on flow rate of liquid and ultrasonic propagation direction, the mean flow rate of measurement liquid or gaseous mediums.Conventionally use a pair of transducer, be arranged on respectively upstream and downstream.Each transducer can be used as transmitter and also can be used as receiver.A ultrasonic pulse is sent to downstream transducer from upstream transducer.Second ultrasonic pulse is sent to upstream transducer from downstream transducer.Brain box is accurately measured the delivery time of all directions.The numerical difference of two delivery times is directly proportional to flow velocity.Then for Fluid Computation mean flow rate.
When following three elements are the ultrasonic flow sensor of applicable its application of customer selecting, most important standard: (1) measuring accuracy; (2) measure reliability; And (3) acquisition cost.Most of clients can select the ultrasonic flow sensor of high measurement accuracy and reliability and low acquisition cost.
The measuring accuracy of ultrasonic flow sensor and reliability are affected by following factor mainly: (1) rate of flow of fluid to be measured; (2) velocity flow profile homogeneity; (3) survey ultrasonic signal intensity; And the parasitic multimode sound wave of (4) internal reflection generation.
Flow velocity, velocity flow profile homogeneity and ultrasonic signal intensity have positive impact to the measuring accuracy of ultrasonic flow sensor and reliability.Faster flow velocity, still less disturb, better velocity flow profile homogeneity and intense ultrasonic wave signal more, can produce higher measuring accuracy and better reliability.On the other hand, the parasitic multimode sound wave that internal reflection produces has negative influence to measuring accuracy and reliability.Parasitic multimode sound wave is stronger, and measuring accuracy and reliability are lower.
In addition, the acquisition cost of ultrasonic flow sensor depends on the life cycle of initial product price and product.Competitive ultrasonic flow sensor must be easy to produce, is convenient to assembling and can retention stablizes in its life cycle.This just requires ultrasonic flow sensor, must be simple as far as possible, and have assembly and the part of minimum number.
Summary of the invention
The utility model has designed a kind of ultrasonic flow sensor, and the technical matters of its solution is that the parasitic multimode that electronic ultrasonic wave transducer produces disperses wave beam to eliminate, and has affected measuring accuracy.
In order to solve the technical matters of above-mentioned existence, the utility model has adopted following scheme:
A kind of ultrasonic flow sensor, comprise flow cavity (20), flow cavity (20) is provided with entrance (21) and outlet (22), inlet end at flow cavity (20) is provided with the first electronic ultrasonic wave transducer (40) and the first ultrasonic reflections mirror (50), endpiece at flow cavity (20) is provided with the second electronic ultrasonic wave transducer (41) and the second ultrasonic reflections mirror (51), the ultrasound wave that the first electronic ultrasonic wave transducer (40) transmits is successively through the first ultrasonic reflections mirror (50), inner flow tube road (30) and the second ultrasonic reflections mirror (51) are received by the second electronic ultrasonic wave transducer (41), described inner flow tube road (30) is provided with eliminates the dentation inside surface (31) that parasitic multimode is disperseed wave beam.
Further, the first ultrasonic reflections mirror (50) and/or the second ultrasonic reflections mirror (51) are provided with horizontal top surface (500) or protruding end face (501).
Further, the first ultrasonic reflections mirror (50) is fixed on flow cavity (20) inwall by the first catoptron support fixture (60).
Further, the second ultrasonic reflections mirror (51) is fixed on flow cavity (20) inwall by the second catoptron support fixture (61).
This ultrasonic flow sensor is compared with conventional ultrasonic wave flow sensor, has following beneficial effect:
(1) the utility model eliminates owing to being provided with in inner flow tube road the dentation inside surface that parasitic multimode is disperseed wave beam, dentation inside surface has not only reduced the flow tr pt from turbulent area to laminar region, also suppress parasitic multimode ultrasound wave, greatly increased measuring accuracy and reliability.
(2) the utility model is because ultrasonic reflections mirror is with horizontal top surface or protruding end face, rather than concave surface, can play and prevent that particle is deposited on the effect on minute surface.
Accompanying drawing explanation
Fig. 1: the structural representation of the utility model ultrasonic flow sensor;
Fig. 2: the fundamental diagram of the utility model ultrasonic flow sensor;
Fig. 3: ultrasonic reflections mirror the first structural representation of the utility model ultrasonic flow sensor;
Fig. 4: ultrasonic reflections mirror the second structural representation of the utility model ultrasonic flow sensor.
Description of reference numerals:
10-ultrasonic flow sensor; 20-flow cavity; 21-entrance; 22-outlet; 30-inner flow tube road; 31-dentation inside surface; The 40-the first electronic ultrasonic wave transducer; The 41-the second electronic ultrasonic wave transducer; The 50-the first ultrasonic reflections mirror; The 51-the second ultrasonic reflections mirror; The 60-the first catoptron support fixture; The 61-the second catoptron support fixture; 80-main measurement wave beam; 81-parasitic multimode is disperseed wave beam.
Embodiment
Below in conjunction with Fig. 1 and Fig. 4, the utility model is described further:
As shown in Figure 1, the utility model ultrasonic flow sensor 10 comprises flow cavity 20, and flow cavity 20 1 sides are provided with entrance 21, and opposite side is provided with outlet 22, and liquid or gaseous mediums flow through entrance or outlet.Inner flow tube road 30 has rough surface or dentation inside surface 31, and it has not only reduced the flow from turbulent area to laminar region and has changed, and has also suppressed parasitic multimode ultrasound wave.A pair of the first electronic ultrasonic wave transducer 40 and the second electronic ultrasonic wave transducer 41 are for transmitting and received ultrasonic signal.The first ultrasonic reflections mirror 50 and the second ultrasonic reflections mirror 51 are for guiding ultrasound wave from a transducer to another transducer; The first catoptron support fixture 60 and the second catoptron support fixture 61 make catoptron align with inner flow tube road 30 center lines.One catoptron support fixture 60 and the second catoptron support fixture 61 are fixed the distance between the first ultrasonic reflections mirror 50 and the second ultrasonic reflections mirror 51 and inner flow tube road 30 entrances or outlet, thereby when maintaining ultrasonic signal intensity, minimum reflected mirror internally flows the interference of flow in pipeline.
As shown in Figure 2, the utility model ultrasonic flow sensor principle of work is as follows:
The ultrasound wave that the first electronic ultrasonic wave transducer 40 transmits, comprises two parts: main measurement wave beam 80 and parasitic multimode are disperseed wave beam 81.Main measurement wave beam 80 passes inner flow tube road 30, and does not intersect with the dentation inside surface 31 in inner flow tube road 30.Through the second ultrasonic reflections mirror 51 reflections, it arrives receiver, i.e. the second electronic ultrasonic wave transducer 41.
Parasitic multimode disperses wave beam 81 paths to be different from main measurement wave beam 80 paths completely.It clashes into dentation inside surface 31 first in porch, and repeatedly by dentation inside surface 31, is reflected in inner flow tube road 30.If dentation inside surface 31 is smooth surfaces, parasitic multimode disperses wave beam 81 after leaving 30 outlets of inner flow tube road, will with main measurement wave beam 80 combinations, by the second ultrasonic reflections mirror 51 reflections, arrive the second electronic ultrasonic wave transducer 41 places.Finally appear in the electronic signal of the second electronic ultrasonic wave transducer 41 precision that impact is measured.But the utility model adopts dentation inside surface 31 to have the rough surface of suitable roughness, parasitic multimode disperses wave beam 81 after by the interior multiple reflections in inner flow tube road 30, will by dentation inside surface 31, be absorbed completely.It can not arrive the second ultrasonic reflections mirror 51 and ultrasonic transducer 41 places.Result is that it there will not be in the electronic signal of ultrasonic transducer 41, and measuring accuracy is further enhanced.
In addition, dentation inside surface 31 is as follows in the distribution characteristics in inner flow tube road 30: the number of teeth amount of inner flow tube road 30 inlet ends and being highly all greater than is positioned at number of teeth amount and the height of inner flow tube road 30 endpiece, is conducive to further subdue parasitic multimode and disperses wave beam 81.
As shown in Figure 3 and Figure 4, the first ultrasonic reflections mirror 50 and the second ultrasonic reflections mirror 51 are made by stainless steel or the plastics that scribble thin metal film layer.The first ultrasonic reflections mirror 50 and the second ultrasonic reflections mirror 51 are with horizontal top surface 500 or protruding end face 501.The concave crown face using in prior art is compared, and horizontal top surface 500 and protruding end face 501 have the advantage that prevents that particle from depositing at minute surface, thereby has prevented the reduction of ultrasonic signal intensity.In addition,, in comparing with the catoptron of concave crown face, with the flow flowing in pipeline 30 in 51 pairs, the first ultrasonic reflections mirror 50 of protruding end face and the second ultrasonic reflections mirror, produce less interference.For avoiding the great supersonic speed that bending causes to disperse, it is enough little that the flexibility of the first ultrasonic reflections mirror 50 and the second ultrasonic reflections mirror 51 keeps.
By reference to the accompanying drawings the utility model has been carried out to exemplary description above; obvious realization of the present utility model is not subject to the restrictions described above; as long as the various improvement that adopted method design of the present utility model and technical scheme to carry out; or without improving, design of the present utility model and technical scheme are directly applied to other occasion, all in protection domain of the present utility model.
Claims (4)
1. a ultrasonic flow sensor, comprise flow cavity (20), flow cavity (20) is provided with entrance (21) and outlet (22), inlet end at flow cavity (20) is provided with the first electronic ultrasonic wave transducer (40) and the first ultrasonic reflections mirror (50), endpiece at flow cavity (20) is provided with the second electronic ultrasonic wave transducer (41) and the second ultrasonic reflections mirror (51), the ultrasound wave that the first electronic ultrasonic wave transducer (40) transmits is successively through the first ultrasonic reflections mirror (50), inner flow tube road (30) and the second ultrasonic reflections mirror (51) are received by the second electronic ultrasonic wave transducer (41), it is characterized in that: described inner flow tube road (30) is provided with eliminates the dentation inside surface (31) that parasitic multimode is disperseed wave beam.
2. ultrasonic flow sensor according to claim 1, is characterized in that: the first ultrasonic reflections mirror (50) and/or the second ultrasonic reflections mirror (51) are provided with horizontal top surface (500) or protruding end face (501).
3. according to ultrasonic flow sensor described in claim 1 or 2, it is characterized in that: the first ultrasonic reflections mirror (50) is fixed on flow cavity (20) inwall by the first catoptron support fixture (60).
4. according to ultrasonic flow sensor described in claim 1 or 2, it is characterized in that: the second ultrasonic reflections mirror (51) is fixed on flow cavity (20) inwall by the second catoptron support fixture (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320630921.7U CN203502065U (en) | 2013-10-14 | 2013-10-14 | Ultrasonic flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320630921.7U CN203502065U (en) | 2013-10-14 | 2013-10-14 | Ultrasonic flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203502065U true CN203502065U (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320630921.7U Expired - Lifetime CN203502065U (en) | 2013-10-14 | 2013-10-14 | Ultrasonic flow sensor |
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| Country | Link |
|---|---|
| CN (1) | CN203502065U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729764A (en) * | 2015-04-03 | 2015-06-24 | 成都声立德克技术有限公司 | Ultra-small handheld ultrasonic heat flow measuring device |
| CN105424112A (en) * | 2016-01-13 | 2016-03-23 | 成都声立德克技术有限公司 | MBUS power supply based ultrasonic wave water meter and water flow measurement method |
| CN110864751A (en) * | 2019-12-30 | 2020-03-06 | 郑州引领科技有限公司 | Special sound channel of ultrasonic wave gas table |
| CN112403417A (en) * | 2020-10-29 | 2021-02-26 | 黄颖 | Pipeline ultrasonic reactor |
-
2013
- 2013-10-14 CN CN201320630921.7U patent/CN203502065U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729764A (en) * | 2015-04-03 | 2015-06-24 | 成都声立德克技术有限公司 | Ultra-small handheld ultrasonic heat flow measuring device |
| CN105424112A (en) * | 2016-01-13 | 2016-03-23 | 成都声立德克技术有限公司 | MBUS power supply based ultrasonic wave water meter and water flow measurement method |
| CN110864751A (en) * | 2019-12-30 | 2020-03-06 | 郑州引领科技有限公司 | Special sound channel of ultrasonic wave gas table |
| CN112403417A (en) * | 2020-10-29 | 2021-02-26 | 黄颖 | Pipeline ultrasonic reactor |
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Granted publication date: 20140326 |