CN208653557U - A kind of ultrasonic sensor for compound pipeline complex pipeline flow detection - Google Patents
A kind of ultrasonic sensor for compound pipeline complex pipeline flow detection Download PDFInfo
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- CN208653557U CN208653557U CN201821341154.7U CN201821341154U CN208653557U CN 208653557 U CN208653557 U CN 208653557U CN 201821341154 U CN201821341154 U CN 201821341154U CN 208653557 U CN208653557 U CN 208653557U
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Abstract
The utility model discloses a kind of ultrasonic sensors for compound pipeline complex pipeline flow detection, comprising: sound wedge is the voussoir that oblique angle is 45 °；Damping layer for the mixture of silica gel and tungsten powder and is uniformly applied on the inclined-plane of sound wedge；Matching layer for epoxy resin and is flat and fit on matching layer；Piezoelectric element is flat and fit on matching layer；Sound wedge and piezoelectric element are enclosed in inside by shell, and sound wedge upper and lower surface it is corresponding with and the upper and lower surface of shell be bonded.The utility model has the following beneficial effects: by selecting the sensing element of suitable ultrasonic sensor, and to the Curve guide impeller of ultrasonic sensor structure, it is improved ultrasonic sensor precision in flow detection.
Description
Technical field
The utility model relates to field of flow detection, in particular to a kind of for the super of compound pipeline complex pipeline flow detection
Sonic sensor.
Background technique
The compound pipeline complex pipelines of slurries is used for transmission due to rubber liner, and what is flowed in pipeline is the acid containing fixed amount
Property liquid, therefore flow is not easy to measure, unrealistic to carry out contact type measurement in the case where not influencing production, therefore non-connects
Touch ultrasonic measurement is exactly optimal selection.The sensor that non-contact type ultrasonic flow measurement uses is generally by one group of group
At it is at an angle to be mounted on pipeline two sides, and angle is generally 180 °, and this group of sensor is that a hair one is received or received each other
Hair.Transmit circuit exports the signal of certain amplitude, certain frequency, and this signal generates ultrasonic wave letter after being applied to emission sensor
Number, receiving sensor, which is then realized, is transformed into electric signal the ultrasonic signal received.Be transformed into after electric signal using amplification,
The processes such as filtering realize the extraction to ultrasonic echo signal, include flow information in signal, can be obtained according to relevant algorithm
The flow of fluid into pipeline.
The tube wall for transmitting Furukawa pipeline used in slurries is by steel pipe and the corrosion resistant rubber layer combination of materials of liner one
It rises, refraction and reflection process are complicated, very high to the design and installation requirement of sensor.Existing technology cannot achieve to this
The slurry flow of compound pipeline complex pipeline measures, and the slurries flowed in pipeline are containing a certain amount of acidic liquid.For example, by using turbine
Flowmeter carries out needing to be sealed in system under test (SUT) pipeline when flow measurement, destroys the flow resistance characteristic of system, and installation maintenance
It is very inconvenient；Volumetric flowmeter is since there are mechanical components such as mechanical rotor, axis, bearing and gears, gauge table holds
Easy to wear, particularly with impure more slurries, filter screen is easy blocking, gauge table is caused not measure accurately；While by
Outer diameter tube is bigger in wet desulfurization system, and electromagnetic flowmeter cannot also use；Traditional ultrasonic flowmeter does not have yet
Applied to Large Diameter Pipeline rubber lined pipe flow detection, it is primarily due to the reasons such as frequency, mounting means and leads to not receive letter
Number.Therefore, there is presently no the instrument of a contactless flow measurement suitable for Large Diameter Pipeline rubber lined pipe in the market.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of ultrasounds for compound pipeline complex pipeline flow detection
Wave sensor is solved in the case where not influencing production, solves to utilize ultrasonic flow measuring by the design to sensor
Formula measures the problem of compound pipeline complex pipeline slurry flow.
The utility model provides a kind of ultrasonic sensor for compound pipeline complex pipeline flow detection, the ultrasonic sensor
Include:
Sound wedge is the voussoir that oblique angle is 45 °；
Damping layer is applied to for the mixture of silica gel and tungsten powder and uniformly on the inclined-plane of the sound wedge；
Matching layer for epoxy resin and is flat and fit on the matching layer；
Piezoelectric element is flat and fit on the matching layer；
Shell closes the sound wedge and the piezoelectric element inside it, and the upper and lower surface of the sound wedge is corresponding
It is bonded with the upper and lower surface with the shell.
As a further improvement of the utility model, further include cable-through hole, runs through a side wall of the shell and prolong
Reach the outside of the shell.
As a further improvement of the utility model, further include locking cap, be sheathed on the cable-through hole extend to it is described
On part outside shell.
As a further improvement of the utility model, further include cable protective sleeve, is connect with the end of the locking cap.
It as a further improvement of the utility model, further include signal transmssion line, one end is welded on the piezoelectric element
On, the other end of the signal transmssion line sequentially passes through the cable-through hole and the cable protective sleeve extends to outside the shell
Portion.
It as a further improvement of the utility model, further include magnet A and magnet B, the two is respectively arranged on the shell
The both ends of lower surface.
The material of the sound wedge is organic glass as a further improvement of the utility model, and the material of the shell is
Aluminium alloy, the piezoelectric element are PZT-5.0 piezoelectric ceramics circle sheet.
The signal transmssion line selects dual shield cable as a further improvement of the utility model,.
As a further improvement of the utility model, the damping layer with a thickness of 1mm.
The inclined-plane of the sound wedge is smooth inclined-plane as a further improvement of the utility model,.
The utility model has the following beneficial effects: the sensing element by selecting suitable ultrasonic sensor, and to super
The Curve guide impeller of acoustic wave sensor structure is improved ultrasonic sensor precision in flow detection, and the scope of application is more
Extensively, can be used alone one group of ultrasonic sensor according to the actual situation, can also two groups of ultrasonic sensors be applied in combination, both
It is suitable for frequency-difference method again suitable for time difference method, is equally applicable to the combination of time difference method and frequency-difference method.
Detailed description of the invention
Fig. 1 is a kind of knot of the ultrasonic sensor for compound pipeline complex pipeline flow detection described in the utility model embodiment
Structure schematic diagram；
Fig. 2 is a kind of temperature of the ultrasonic sensor for compound pipeline complex pipeline flow detection described in the utility model embodiment
Spend characteristic curve；
Fig. 3 is a kind of leading for ultrasonic sensor for compound pipeline complex pipeline flow detection described in the utility model embodiment
Receive frequency characteristic and phase-frequency characteristic test curve；
In figure,
1, sound wedge；2, shell；3, piezoelectric element；4, cable-through hole；5, locking cap；6, cable protective sleeve；7, signal transmssion line；
8, magnet A；9, magnet B.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the utility model is further described in detail.
As shown in Figure 1, being a kind of ultrasonic wave biography for compound pipeline complex pipeline flow detection described in the utility model embodiment
Sensor, the ultrasonic sensor include:
Sound wedge 1 is the voussoir that oblique angle is 45 °.45 ° of oblique angle designs of sound wedge 1 be in order to avoid ultrasonic wave in pipeline and
It generates stronger interaction when propagating in fluid to echo, while the design also can be improved signal strength.The inclined-plane of sound wedge 1 is processed
For smooth inclined-plane, the fitting of damping layer can be more advantageous to.
Damping layer for the mixture of silica gel and tungsten powder and is uniformly applied on the inclined-plane of sound wedge 1.Damping layer is in silica gel
Suitable tungsten powder is participated in, is applied on the inclined-plane of sound wedge 1 after evenly mixing, through desiccation in 48 hours, silica gel was high impedance, height declines
The sound-absorbing material subtracted can be absorbed the ultrasonic wave of 3 back side radiant of piezoelectric element and be converted into thermal energy, reduces back side radiant and produces
Raw interference.
Matching layer for epoxy resin and is flat and fit on matching layer.Epoxy resin ratio used in the present embodiment is 4:
1, the sensitivity of sensor can be improved as matching layer for epoxy resin, and make band spread, and piezoelectric element 3 is made to be incident on sound
Projection coefficient when wedge 1 is improved.
Piezoelectric element 3, is flat and fit on matching layer.The positive and negative anodes of piezoelectric element 3 are set to the same side in the present embodiment,
I.e. on the another side of piezoelectric element 3 and matching layer fitting.
Shell 2 closes sound wedge 1 and piezoelectric element 3 inside it, and the upper and lower surface of sound wedge 1 corresponds to and and shell 2
Upper and lower surface fitting.Shell 2 is it is ensured that the sound wedge 1 for posting piezoelectric element 3 is completely placed into inside it, so as to avoid the external world
Interference reduces measurement error, keeps measurement result more accurate.And by two parallel planes of sound wedge 1 respectively and above and below shell 2
Two parallel plane fittings are placed, and are to avoid the occurrence of larger space in order to keep shell 2 more preferable to the packaging effect of sound wedge 1 and cause
Sound wedge 1 installs insecure influence measurement result.
Further, further include cable-through hole 4, run through a side wall of shell 2 and extend to the outside of shell 2.
Further, further include locking cap 5, be sheathed on cable-through hole 4 and extend on the part outside shell 2.
Further, further include cable protective sleeve 6, connect with the end of locking cap 5.
Further, further include signal transmssion line 7, one end is welded on piezoelectric element 3, signal transmssion line 7 it is another
End sequentially passes through cable-through hole 4 and cable protective sleeve 6 extends to outside shell 2.
Cable-through hole 4, locking cap 5 and cable protective sleeve 6 are for ensureing that signal transmssion line 7 can be by safety in shell 2
It draws.
It further, further include magnet A 8 and magnet B 9, the two is respectively arranged on the both ends of 2 lower surface of shell.Magnet A 8
It is for the ease of removing to be adsorbed in pipe under test supersonic sensing with magnet B 9.
Further, the material of sound wedge 1 is organic glass, and the material of shell 2 is aluminium alloy, and piezoelectric element 3 is PZT-5.0
Piezoelectric ceramics circle sheet.Organic glass is not only easily worked, but also the very little that decays when 5MHz or less, while organic glass
It is good with workpiece acoustical coupling characteristic.The advantage that the more traditional rubber of aluminum alloy casing 2 or aluminium shell have intensity high, light-weight.
The characteristic of piezoelectric element 3 used in the utility model embodiment, structure, size pass through theoretical calculation both for rubber lined pipe
, the directive property of sound wave is improved for rubber lined pipe.PZT-5.0 piezoelectric ceramics circle sheet vibrates along the thickness direction, generation
Ultrasonic wave is longitudinal wave.The piezoelectric ceramics sensitivity and Curie temperature height, various parameters time stability are good, dielectric with higher
Constant and electromechanical coupling factor.
Further, signal transmssion line 7 selects dual shield cable.Dual shield cable can ensure signal quality, to the greatest extent
Interference of the noise to signal is may be decreased.
Further, damping layer with a thickness of 1mm.
Further, the inclined-plane of sound wedge 1 is smooth inclined-plane.
The utility model embodiment is tested the performance of the ultrasonic sensor:
(1) temperature property test
To the piezoelectric modulus of piezoelectric material and creating a great impression for dielectric constant, it will make ultrasonic wave for the variation of environment temperature
Transducer sensitivity changes.But when temperature is lower than 400 DEG C, piezoelectric modulus and dielectric constant are all very stable.According to reality
The test condition on border, the temperature test of ultrasonic sensor are set within the scope of -30 DEG C~100 DEG C.Ultrasonic sensor passes through
After the test of high and low temperature, ultrasonic sensor output characteristics does not change substantially, i.e., ultrasonic sensor can be very good work
Make in the range of -25 DEG C~85 DEG C, meets design requirement, temperature characteristics is as shown in Figure 2.
(2) frequency characteristic test
Using NF company impedance/gain-phase integration analysis device ZGA5905 to the ultrasonic sensor of design into
The test of row impedance behavior, the frequency band that ZGA5905 instrument can measure 0.1mHz~15MHz measure, and obtain ultrasonic wave biography
The frequency versus impedance characteristic of sensor makes it preferably carry out impedance matching with circuit.
Ultrasonic sensor carries out admittance frequency characteristic and phase-frequency characteristic test in 50KHz~1.5MHz frequency band,
It is mutated as can be seen from Figure 3 in 800KHz~1.2MHz frequency separation phase, and conductance maximum value and conductance minimum value
This frequency separation is appeared in, entire scope illustrates series resonance frequency in this section, to shift onto out at -180 °~180 °
Piezoelectric parameter, such as C0, C1, R1, L1, Qm, finally derive the impedance matching inductance of piezoelectric transducer and driving circuit.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of ultrasonic sensor for compound pipeline complex pipeline flow detection characterized by comprising
Sound wedge (1) is the voussoir that oblique angle is 45 °；
Damping layer is applied to for the mixture of silica gel and tungsten powder and uniformly on the inclined-plane of the sound wedge (1)；
Matching layer for epoxy resin and is flat and fit on the matching layer；
Piezoelectric element (3), is flat and fit on the matching layer；
Shell (2) closes the sound wedge (1) and the piezoelectric element (3) inside it, and the sound wedge (1) is upper and lower
Surface it is corresponding with and the upper and lower surface of the shell (2) be bonded.
2. the ultrasonic sensor according to claim 1 for compound pipeline complex pipeline flow detection, which is characterized in that further include
Cable-through hole (4) runs through a side wall of the shell (2) and extends to the outside of the shell (2).
3. the ultrasonic sensor according to claim 2 for compound pipeline complex pipeline flow detection, which is characterized in that further include
Locking cap (5) is sheathed on the cable-through hole (4) and extends on the part of the shell (2) outside.
4. the ultrasonic sensor according to claim 3 for compound pipeline complex pipeline flow detection, which is characterized in that further include
Cable protective sleeve (6) is connect with the end of the locking cap (5).
5. the ultrasonic sensor according to claim 4 for compound pipeline complex pipeline flow detection, which is characterized in that further include
Signal transmssion line (7), one end are welded on the piezoelectric element (3), and the other end of the signal transmssion line (7) sequentially passes through
It is external that the cable-through hole (4) and the cable protective sleeve (6) extend to the shell (2).
6. the ultrasonic sensor according to claim 1 for compound pipeline complex pipeline flow detection, which is characterized in that further include
Magnet A (8) and magnet B (9), the two are respectively arranged on the both ends of the shell (2) lower surface.
7. the ultrasonic sensor according to claim 1 for compound pipeline complex pipeline flow detection, which is characterized in that the sound
The material of wedge (1) is organic glass, and the material of the shell (2) is aluminium alloy, and the piezoelectric element (3) is PZT-5.0 piezoelectricity
Ceramic circle sheet.
8. the ultrasonic sensor according to claim 5 for compound pipeline complex pipeline flow detection, which is characterized in that the letter
Number transmission line (7) selects dual shield cable.
9. the ultrasonic sensor according to claim 1 for compound pipeline complex pipeline flow detection, which is characterized in that the resistance
Buddhist nun layer with a thickness of 1mm.
10. the ultrasonic sensor according to claim 1 for compound pipeline complex pipeline flow detection, which is characterized in that described
The inclined-plane of sound wedge (1) is smooth inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821341154.7U CN208653557U (en) | 2018-08-20 | 2018-08-20 | A kind of ultrasonic sensor for compound pipeline complex pipeline flow detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821341154.7U CN208653557U (en) | 2018-08-20 | 2018-08-20 | A kind of ultrasonic sensor for compound pipeline complex pipeline flow detection |
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| Publication Number | Publication Date |
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| CN208653557U true CN208653557U (en) | 2019-03-26 |
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| CN201821341154.7U Active CN208653557U (en) | 2018-08-20 | 2018-08-20 | A kind of ultrasonic sensor for compound pipeline complex pipeline flow detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917866A (en) * | 2018-08-20 | 2018-11-30 | 大唐环境产业集团股份有限公司 | A kind of ultrasonic sensor and its installation method for compound pipeline complex pipeline flow detection |
| CN113563722A (en) * | 2021-07-26 | 2021-10-29 | 厦门大学 | Acoustic metamaterial and preparation method thereof |
-
2018
- 2018-08-20 CN CN201821341154.7U patent/CN208653557U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917866A (en) * | 2018-08-20 | 2018-11-30 | 大唐环境产业集团股份有限公司 | A kind of ultrasonic sensor and its installation method for compound pipeline complex pipeline flow detection |
| CN113563722A (en) * | 2021-07-26 | 2021-10-29 | 厦门大学 | Acoustic metamaterial and preparation method thereof |
| CN113563722B (en) * | 2021-07-26 | 2023-01-24 | 厦门大学 | Acoustic metamaterial and preparation method thereof |
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