CN207215202U - A kind of ultrasonic flowmeter - Google Patents
A kind of ultrasonic flowmeter Download PDFInfo
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- CN207215202U CN207215202U CN201720833109.2U CN201720833109U CN207215202U CN 207215202 U CN207215202 U CN 207215202U CN 201720833109 U CN201720833109 U CN 201720833109U CN 207215202 U CN207215202 U CN 207215202U
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Abstract
The utility model discloses a kind of ultrasonic flowmeter, including：Measurement pipe；A ultrasound emission transducer on the tube wall of the measurement pipe, for launching ultrasonic signal；At least two ultrasonic reception transducers on the tube wall of the measurement pipe, for receiving the ultrasonic signal of the ultrasound emission transducer transmitting.Ultrasound emission transducer is only used for launching ultrasonic signal in the utility model, ultrasonic reception transducer is only used for receiving the ultrasonic signal of the ultrasound emission transducer transmitting, undertake transmitting and the receive capabilities of ultrasonic signal simultaneously compared to ultrasonic transducer in the prior art, ultrasonic flowmeter processing of circuit provided by the utility model is more flexible, and control is more simple.In addition, because the utility model sets the ultrasonic signal that the same ultrasound emission transducer of at least two ultrasonic reception transducers reception is launched to calculate the flow velocity of the medium flowed through in measurement pipe, the larger change of flow state brought of time interval can be largely avoided, makes signal detection more accurate.
Description
Technical field
The utility model embodiment is related to e measurement technology, more particularly to a kind of ultrasonic flowmeter.
Background technology
Ultrasonic wave has a wide range of applications in terms of the flow velocity measurement of gas and fluid, and traditional mechanical flow instrument
Table, electromagnetic flow instrument are compared, ultrasonic flowmeter have measuring accuracy height, the strong adaptability to caliber, non-contact fluid,
It is easy to use, be easy to the advantages that digital management.
At present on the market mainly measure low flow velocity ultrasonic flowmeter, i.e., flow velocity below 60m/s ultrasonic flowmeter,
This causes to be difficult to make due to gas flow rate too high (generally reaching more than 100m/s) under torch gas, high compression gas pipeline occasion
Use ultrasonic flowmeter；Because there is the pressure loss, having the inferior positions such as movable member in traditional high-speed gas measuring instrument so that metering
Precision it is relatively low, its application be also greatly restricted.
Utility model content
The utility model provides a kind of ultrasonic cleaning high pressure flowmeter, can be preferable to improve the metering range of ultrasonic flowmeter
Solution high speed flow accurate measurement and the accurate measurement of low speed flow can be met simultaneously.
Embodiment of the present utility model provides a kind of ultrasonic flowmeter, including：Measurement pipe；Positioned at the pipe of the measurement pipe
A ultrasound emission transducer on wall, for launching ultrasonic signal；At least two surpassing on the tube wall of the measurement pipe
Sound reception transducer, for receiving the ultrasonic signal of the ultrasound emission transducer transmitting.
Further, the ultrasound emission transducer and the ultrasonic reception transducer are oppositely arranged, and are located at institute respectively
State in the side wall of central shaft both sides of measurement pipe.
Further, the ultrasound emission transducer and the ultrasonic reception transducer are located at the central shaft of the measurement pipe
In the side wall of the same side.
Further, direction is flowed to along the medium in the measurement pipe, the ultrasonic reception transducer is located at the ultrasound
The downstream of transmitting transducer.
Further, the ultrasonic flowmeter also includes：Processing unit；The processing unit and the ultrasound emission transducing
Device and at least two ultrasonic receptions transducer connection, and the stream of the medium in the equation below calculating measurement pipe
Speed：
Wherein, V be the measurement pipe in medium flow velocity, L2For the ultrasound emission transducer and the first ultrasonic reception
Ultrasonic signal path-length between transducer, t2For ultrasonic signal described is traveled to from the ultrasound emission transducer
The time of one ultrasonic reception transducer, L3Ultrasound letter between the ultrasound emission transducer and the second ultrasonic reception transducer
Number path-length, t3For ultrasonic signal the second ultrasonic reception transducer is traveled to from the ultrasound emission transducer
Time, ultrasonic signal transmission directions of the A between the ultrasound emission transducer and the first ultrasonic reception transducer and the survey
Medium in buret flows to the angle in direction, and B is super between the ultrasound emission transducer and the second ultrasonic reception transducer
Acoustical signal transmission direction flows to the angle in direction with the medium in the measurement pipe；The first ultrasonic reception transducer and institute
The second ultrasonic reception transducer is stated as ultrasonic reception transducer described in any two on the tube wall of the measurement pipe.
Further, first inwall pip of the ultrasonic signal through the measurement pipe of the ultrasound emission transducer transmitting
Received after reflection by the first ultrasonic reception transducer；The ultrasonic signal of the ultrasound emission transducer transmitting is through the measurement pipe
Received after second inwall reflection point reflection by the second ultrasonic reception transducer；The first ultrasonic reception transducer and described
Two ultrasonic reception transducers are ultrasonic reception transducer described in any two on the tube wall of the measurement pipe；
Also include：Processing unit；
The processing unit is connected with the ultrasound emission transducer and at least two ultrasonic receptions transducer, and
The flow velocity of the medium in the measurement pipe is calculated according to equation below：
Wherein, V be the measurement pipe in medium flow velocity, L2For the ultrasound emission transducer and the first ultrasonic reception
Ultrasonic signal path-length between transducer, t2For ultrasonic signal described is traveled to from the ultrasound emission transducer
The time of one ultrasonic reception transducer, L3Ultrasound letter between the ultrasound emission transducer and the second ultrasonic reception transducer
Number path-length, t3For ultrasonic signal the second ultrasonic reception transducer is traveled to from the ultrasound emission transducer
Time, ultrasonic signal transmission directions of the A between the ultrasound emission transducer and the first inwall pip and the survey
Medium in buret flows to the angle in direction, and B is super between the ultrasound emission transducer and the second inwall pip
Acoustical signal transmission direction flows to the angle in direction with the medium in the measurement pipe.
Further, the ultrasound emission transducer and the ultrasonic reception transducer are arranged on the inwall of the flowtube
Or outer wall.
Further, the shape of the measurement pipe includes cylindrical tube or rectangular tube.
Further, direction is flowed to along the medium in the measurement pipe, ultrasonic reception transducer is described described in the first two
First ultrasonic reception transducer and the second ultrasonic reception transducer.
Further, direction is flowed to along the medium in the measurement pipe, most latter two described ultrasonic reception transducer is institute
State the first ultrasonic reception transducer and the second ultrasonic reception transducer.
Ultrasonic flowmeter provided by the utility model includes a ultrasound emission transducer and at least two ultrasonic receptions change
Energy device, ultrasound emission transducer are used only as sending ultrasonic signal, and ultrasonic reception transducer is used only as receiving ultrasonic signal, compared to
Ultrasonic transducer undertakes transmitting and the receive capabilities of ultrasonic signal, ultrasonic flow rate provided by the utility model simultaneously in the prior art
It is more flexible to count processing of circuit, control is more simple.Further, since the utility model sets at least two ultrasonic reception transducers
The ultrasonic signal of same ultrasound emission transducer transmitting is received to calculate the flow velocity of the medium flowed through in measurement pipe, can very great Cheng
The larger change of flow state brought of time interval is avoided on degree, makes signal detection more accurate.
Brief description of the drawings
Fig. 1 is a kind of ultrasonic flowmeter that the utility model embodiment provides.
Fig. 2 is another ultrasonic flowmeter that the utility model embodiment provides.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than to restriction of the present utility model.Further need exist for
It is bright, for the ease of description, the part related to the utility model rather than entire infrastructure are illustrate only in accompanying drawing.
A kind of ultrasonic flowmeter that Fig. 1 provides for the utility model embodiment, ultrasonic flowmeter as shown in Figure 1, including：
Measurement pipe 5；A ultrasound emission transducer 1 on the tube wall of measurement pipe 5, for launching ultrasonic signal；Positioned at measurement pipe 5
Tube wall at least two ultrasonic reception transducers, for receive ultrasound emission transducer 1 transmitting ultrasonic signal.Need
It is bright, it can be configured for the number of ultrasonic reception transducer according to practical application scene, this sentences three ultrasonic receptions
Exemplified by transducer, as shown in figure 1, the utility model embodiment on the tube wall of measurement pipe 5 be provided with ultrasonic reception transducer 2,
Ultrasonic reception transducer 3 and ultrasonic reception transducer 4.
Specifically, when ultrasound emission transducer 1 launches ultrasonic signal, ultrasonic reception transducer 2, ultrasonic reception transducer
3 and ultrasonic reception transducer 4 be subjected to ultrasound emission transducer 1 transmitting ultrasonic signal.In the utility model embodiment
Ultrasound emission transducer 1 is only used for launching ultrasonic signal, and ultrasonic reception transducer 2,3 and 4 is only used for receiving ultrasonic signal, with showing
Have the transducer mutually received and dispatched in technology to compared to, on the one hand, the selection of transducer has greater flexibility, processing of circuit
Very big simplification is obtained；On the other hand, because the transducer mutually received and dispatched is to ultrasonic signal transmitting procedure：First transducing
Device launches ultrasonic signal, and the ultrasonic signal that second transducer receives first transducer transmitting is received super again afterwards
Acoustical signal is transmitted to first ultrasonic transducer, and whole process is divided into first transducer and transmits signals to second transducer,
Second transducer transmits signals to first transducer, two periods completions, because time interval is larger, it is impossible to ensure two
The fluidised form of medium in the individual period in measurement pipe does not change, and easily causes signal amplitude and changing features acutely etc. to be asked
Topic, influence the accuracy of measurement.Embodiment of the present utility model launches ultrasonic signal using same ultrasound emission transducer 1,
Ultrasonic reception transducer 2,3 and 4 receives ultrasonic signal, between the time that ultrasonic signal is received due to ultrasonic reception transducer 2,3 and 4
Every relatively closely, the larger change of flow state brought of time interval can be largely avoided, makes signal detection highly efficient.
Optionally, ultrasound emission transducer 1 and ultrasonic reception transducer 2,3 and 4 are oppositely arranged, and are located at measurement pipe respectively
In the side wall of 5 both sides of central shaft 8.It should be noted that for ultrasonic reception transducer 2,3 and 4 position relationship herein not
It is specifically limited, three can be set on the same line, can not also be on the same line.
Specifically, ultrasonic flowmeter also includes processing unit (not shown)；Processing unit and ultrasound emission transducer 1
And at least two connections in ultrasonic reception transducer 2,3 and 4.
Specifically, when ultrasound emission transducer 1 and ultrasonic reception transducer 2,3 and 4 are oppositely arranged, and respectively positioned at measurement
When in the side wall of the central shaft both sides of pipe 5, as shown in figure 1, setting velocity of medium in measurement pipe 5, as V, medium is flowed to such as the institute of arrow 7
Show, velocity of sound C, the time that ultrasonic signal travels to ultrasonic reception transducer 2 by ultrasound emission transducer 1 is t2, sound path 12 is
L2, the angle 22 of the transmission direction and medium flow direction of the ultrasonic signal that ultrasonic reception transducer 2 receives is A；Ultrasonic signal is by surpassing
The time that acoustic emission transducer 1 travels to ultrasonic reception transducer 3 is t3, sound path 13 is L3, ultrasonic reception transducer 3 receives
The angle 23 of transmission direction and medium flow direction of ultrasonic signal be B；Ultrasonic signal travels to reception by ultrasound emission transducer 1
The time of transducer 4 is t4, sound path 14 is L4, the transmission direction and medium flow field of the ultrasonic signal that ultrasonic reception transducer 4 receives
To angle 24 be D.According to the actual reception condition of signal, the larger passage of two groups of signals is chosen as metering, here with super
Sound reception transducer 2 is the first ultrasonic reception transducer, exemplified by ultrasonic reception transducer 3 is the second ultrasonic reception transducer, is said
The bright process for calculating the velocity of medium in measurement pipe 5：
The speed that ultrasonic signal is propagated between the ultrasonic reception transducer of ultrasound emission transducer 1 and first is
V12=C+V*cosA (1)
The time that ultrasonic signal is reached the first ultrasonic reception transducer by ultrasound emission transducer 1 is
It can be obtained by formula (1) and formula (2)
The speed that ultrasonic signal is propagated between the ultrasonic reception transducer of ultrasound emission transducer 1 and second is
The time that ultrasonic signal is reached the second ultrasonic reception transducer by ultrasound emission transducer 1 is
Can obtain velocity of medium according to formula (2) and (4) or (3) and (5) is
The expression formula of velocity of medium is obtained by above-mentioned calculating process, can be to obtain medium with reference to the diameter 6 of measurement pipe 5
Flow.In order to examine the correctness of measurement and result of calculation into, the result of calculation of velocity of medium can be brought to formula (1) or formula
(3) velocity of sound expression formula (7) is obtained, by bringing the concrete numerical value to the velocity of sound of specific data into, with the velocity of sound in corresponding medium
Standard figures is compared, it is possible to determine that the accuracy of the velocity of medium measured.
Fig. 2 provides another ultrasonic flowmeter for the utility model embodiment, as shown in Fig. 2 ultrasound emission transducer 1
It is located at ultrasonic reception transducer 2,3 and 4 in the side wall of the same side of central shaft 8 of measurement pipe 5.In this case, ultrasound emission
The reflection of side wall of the ultrasonic signal that transducer 1 is launched Jing Guo the measurement pipe 5 relative with ultrasound emission transducer, sends to ultrasound
Receive transducer 2,3 and 4.It should be noted that ultrasound emission transducer 1, ultrasonic reception transducer 2,3 and 4 can be same
, can also be on no longer same straight line on straight line.
Optionally, ultrasonic flowmeter also includes processing unit (not shown)；Processing unit and ultrasound emission transducer 1
And at least two connections in ultrasonic reception transducer 2,3 and 4.
Optionally, direction (arrow 7 represents that medium flows to direction in Fig. 2), ultrasonic reception are flowed to along the medium in measurement pipe 5
Transducer 2,3 and 4 is located at the downstream of the ultrasound emission transducer 1.The sent downstream ultrasonic signal of ultrasound emission transducer 1 is to super
Sound reception transducer 2,3 and 4, the first sent downstream another mistake stream of the transducer pair with mutually receiving and dispatching is launched or first adverse current transmitting is suitable again
Stream transmitting is compared, and the noise of signal is bigger, and software processes are also fairly simple.
Specifically, the central shaft 8 for being located at measurement pipe 5 when ultrasound emission transducer 1 and ultrasonic reception transducer 2,3 and 4 is same
In the side wall of side, changed as shown in Fig. 2 the communication process of ultrasonic signal is divided into from ultrasound emission transducer 1 to ultrasound emission
Can the relative side wall of device 1 the first communication process and reflex to the second of ultrasonic reception transducer 2,3 and 4 by side wall and be propagated through
Journey.If velocity of medium is V in measurement pipe 5, medium flow direction is as shown in arrow 11, and velocity of sound C, ultrasonic signal is by ultrasound emission transducing
The sound path 12 that device 1 travels to ultrasonic reception transducer 2 is L2, it is the sound path L of the first communication process21With the second communication process
Sound path L22Sum, and L21And L22It is equal in magnitude, time t used2For time t used in the first communication process21With the second communication process
Time t used22Sum, and t21And t22It is equal, in the first communication process the inwall pip 9 of ultrasound emission transducer 1 and first it
Between ultrasonic signal transmission direction and measurement pipe in medium to flow to the angle in direction be A, the first inwall in the second communication process
The angle that ultrasonic signal transmission direction between pip 9 and ultrasonic reception transducer 2 and medium flow to direction is a, and A and a
It is equal；The sound path 13 that ultrasonic signal travels to ultrasonic reception transducer 3 by ultrasound emission transducer 1 is L3, it is the first propagation
The sound path L of process31With the sound path L of the second communication process32Sum, and L31And L32It is equal in magnitude, time t used3Propagated for first
Time t used in process31With the second communication process used in time t32Sum, and t31And t32It is equal, ultrasound hair in the first communication process
The angle that the ultrasonic signal transmission direction penetrated between the inwall pip 10 of transducer 1 and second and medium flow to direction is B, second
Ultrasonic signal transmission direction and medium flow direction side in communication process between the second inwall pip 10 and ultrasonic reception transducer 3
To angle be b, and B and b are equal；Ultrasonic signal is traveled to the sound path 14 of ultrasonic reception transducer 4 by ultrasound emission transducer 1
For L4The sound path L of first communication process41With the sound path L of the second communication process42Sum, and L41And L42It is equal in magnitude, the time used
t4For time t used in the first communication process41With the second communication process used in time t42Sum, and t41And t42Equal, first propagates
During ultrasonic signal transmission direction between the inwall pip 11 of ultrasound emission transducer 1 and the 3rd flow to direction with medium
Angle is D, the ultrasonic signal transmission direction in the second communication process between the 3rd inwall pip 11 and ultrasonic reception transducer 4
The angle that direction is flowed to medium is d, and D and d are equal.According to the actual reception condition of signal, it is larger to choose two groups of signals
Passage is as metering, and here with ultrasonic reception transducer 2 for the first ultrasonic reception transducer, ultrasonic reception transducer 3 is second
Exemplified by ultrasonic reception transducer, first inwall pip 9 of the ultrasonic signal through measurement pipe 5 that ultrasound emission transducer 1 is launched is anti-
Received after penetrating by the first ultrasonic reception transducer；Second inwall of the ultrasonic signal through measurement pipe 5 that ultrasound emission transducer 1 is launched
Pip 10 is received after reflecting by the second ultrasonic reception transducer.
The speed that ultrasonic signal is propagated between the ultrasonic reception transducer of ultrasound emission transducer 1 and first is
V12=C+V*cosA (8)
The time that ultrasonic signal is reached the first ultrasonic reception transducer by ultrasound emission transducer 1 is
It can be obtained by formula (8) and formula (9)
The speed that ultrasonic signal is propagated between the ultrasonic reception transducer of ultrasound emission transducer 1 and second is
The time that ultrasonic signal is reached the second ultrasonic reception transducer by ultrasound emission transducer 1 is
Can obtain velocity of medium according to formula (9) and (11) or (10) and (12) is
The expression formula of velocity of medium is obtained by above-mentioned calculating process, can be to obtain medium with reference to the diameter 6 of measurement pipe 5
Flow.In order to examine the correctness of measurement and result of calculation into, the result of calculation of velocity of medium can be brought to formula (8) or formula
(10) velocity of sound expression formula (14) is obtained, by bringing the concrete numerical value to the velocity of sound of specific data into, with the velocity of sound in corresponding medium
Standard figures be compared, it is possible to determine that the accuracy of the velocity of medium measured.
Optionally, the first ultrasonic reception transducer and the second ultrasonic reception transducer are the tube wall positioned at the measurement pipe
On any two described in ultrasonic reception transducer.
Optionally, ultrasound emission transducer 1 and the ultrasonic reception transducer 2,3 and 4 are arranged on the interior of the flowtube
Wall or outer wall.
Optionally, the shape of measurement pipe 5 includes cylindrical tube or rectangular tube.
It can increase the number of ultrasonic reception transducer upwards along medium flow field according to actual conditions in specific measurement process
Amount.When the flow velocity of testing medium is smaller, medium overall offset is smaller in signal propagation time, is flowed to along the medium in measurement pipe
Direction, the signal receive transducer close to upstream can receive stronger signal, have higher signal to noise ratio, such as optional along survey
For medium flow field to direction, the first two ultrasonic reception transducer is respectively the first ultrasonic reception transducing in above-mentioned calculating process in buret
Device and the second ultrasonic reception transducer.When the flow velocity of testing medium is larger, in signal propagation time medium overall offset compared with
Greatly, direction is flowed to along the medium in measurement pipe, the signal receive transducer close to downstream can receive stronger signal, have
Higher signal to noise ratio, direction is flowed to along the medium in measurement pipe, such as select most latter two ultrasonic reception transducer and respectively above-mentioned
The first ultrasonic reception transducer and the second ultrasonic reception transducer in calculating process.
The ultrasonic flowmeter that the utility model embodiment provides, by there is a ultrasound emission transducer to launch ultrasonic signal
When, multiple ultrasonic reception transducers are subjected to ultrasonic signal, and ultrasound emission transducer is only used for launching ultrasonic signal, ultrasound
Receive transducer is only used for receiving ultrasonic signal, and accurate metering can be achieved to the flow of low flow velocity and high flow rate medium, improve
The metering range of ultrasonic flowmeter.And the transducer with mutually receiving and dispatching is to compared with, on the one hand, the selection of transducer has bigger
Flexibility, processing of circuit also obtained very big simplification；On the other hand, the time of multiple ultrasonic reception transducer reception signals
Interval is nearer, largely avoids the larger change of flow state brought of time interval, makes signal detection highly efficient.
Pay attention to, above are only preferred embodiment of the present utility model and institute's application technology principle.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carried out for a person skilled in the art various bright
Aobvious change, readjust and substitute without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and the scope of the utility model is by appended
Right determine.
Claims (8)
- A kind of 1. ultrasonic flowmeter, it is characterised in that including：Measurement pipe；A ultrasound emission transducer on the tube wall of the measurement pipe, for launching ultrasonic signal；At least two ultrasonic reception transducers on the tube wall of the measurement pipe, for receiving the ultrasound emission transducer The ultrasonic signal of transmitting.
- 2. ultrasonic flowmeter according to claim 1, it is characterised in that the ultrasound emission transducer and the ultrasound connect Transducer is received to be oppositely arranged, and respectively in the side wall of the central shaft both sides of the measurement pipe.
- 3. ultrasonic flowmeter according to claim 1, it is characterised in that the ultrasound emission transducer and the ultrasound connect In the side wall for receiving central shaft the same side that transducer is located at the measurement pipe.
- 4. ultrasonic flowmeter according to claim 1, it is characterised in that direction is flowed to along the medium in the measurement pipe, The ultrasonic reception transducer is located at the downstream of the ultrasound emission transducer.
- 5. ultrasonic flowmeter according to claim 2, it is characterised in that also include：For calculating in the measurement pipe The processing unit of the flow velocity of medium；The processing unit and the ultrasound emission transducer and at least two ultrasonic reception Transducer connects.
- 6. ultrasonic flowmeter according to claim 3, it is characterised in that the ultrasound letter of the ultrasound emission transducer transmitting Number through the measurement pipe the first inwall reflection point reflection after by the first ultrasonic reception transducer receive；The ultrasound emission transducing The ultrasonic signal of device transmitting is received after the second inwall reflection point reflection of the measurement pipe by the second ultrasonic reception transducer；Institute It is any on the tube wall of the measurement pipe to state the first ultrasonic reception transducer and the second ultrasonic reception transducer Two ultrasonic reception transducers；Also include：For the processing unit for the flow velocity for calculating the medium in measurement pipe；The processing unit is connected with the ultrasound emission transducer and at least two ultrasonic receptions transducer.
- 7. ultrasonic flowmeter according to claim 1, it is characterised in that the ultrasound emission transducer and the ultrasound connect Receive inwall or outer wall that transducer is arranged on the flowtube.
- 8. ultrasonic flowmeter according to claim 1, it is characterised in that the shape of the measurement pipe include cylindrical tube or Rectangular tube.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720833109.2U CN207215202U (en) | 2017-07-11 | 2017-07-11 | A kind of ultrasonic flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720833109.2U CN207215202U (en) | 2017-07-11 | 2017-07-11 | A kind of ultrasonic flowmeter |
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| CN207215202U true CN207215202U (en) | 2018-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131919A (en) * | 2017-07-11 | 2017-09-05 | 上海诺仪表有限公司 | A kind of ultrasonic flowmeter |
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2017
- 2017-07-11 CN CN201720833109.2U patent/CN207215202U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131919A (en) * | 2017-07-11 | 2017-09-05 | 上海诺仪表有限公司 | A kind of ultrasonic flowmeter |
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