CN208653558U - Integral type ultrasonic sensor - Google Patents
Integral type ultrasonic sensor Download PDFInfo
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- CN208653558U CN208653558U CN201821421879.7U CN201821421879U CN208653558U CN 208653558 U CN208653558 U CN 208653558U CN 201821421879 U CN201821421879 U CN 201821421879U CN 208653558 U CN208653558 U CN 208653558U
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Abstract
The utility model discloses a kind of integral type ultrasonic sensor, which includes: that sound voussoir is isosceles trapezoid；Damping layer is the mixture of silica gel and tungsten powder and is uniformly applied on two inclined-planes of sound voussoir；Matching layer is epoxy resin and is flat and fit on damping layer；First piezoelectric element is flat and fit on a matching layer；Second piezoelectric element is flat and fit on another matching layer；First signal wire and the first piezoelectric element are welded to connect；Second signal line and the second piezoelectric element are welded to connect；Sound voussoir, the first piezoelectric element and the second piezoelectric element are enclosed in inside by protective shell, and the upper and lower surface correspondence of sound voussoir is bonded with the upper and lower surface of protective shell.The utility model has the following beneficial effects: being conducive to improve measurement accuracy when flow velocity is slower or when non-full pipe；It simultaneously because ultrasonic sensor described in the utility model is transceiver, therefore can be used alone, can also be applied in combination according to the actual situation, it is applied widely.
Description
Technical field
The utility model relates to compound pipeline complex pipeline flow detection technical fields, in particular to a kind of integral type ultrasonic wave
Sensor.
Background technique
The compound pipeline complex pipeline for being used for transmission slurries has rubber liner, and what is flowed in pipeline is the acidity containing solid particle
Liquid, such as turbine flowmeter carry out needing to be sealed in system under test (SUT) pipeline when flow measurement, and the flow resistance for destroying system is special
Property, and installation maintenance is very inconvenient；Volumetric flowmeter is since there are the mechanical rotations such as mechanical rotor, axis, bearing and gear
Component, gauge table are prone to wear, and especially for impure more slurries, filter screen is easy blocking, causes gauge table can not
Accurate metering.Simultaneously because outer diameter tube is bigger, electromagnetic flowmeter cannot also be used；Traditional ultrasonic flowmeter does not have yet
Flow measurement applied to Large Diameter Pipeline rubber lined pipe, be primarily due to the reasons such as frequency, mounting means lead to not it is received
Signal.Therefore in the market there is presently no the instrument of a contactless flow measurement suitable for Large Diameter Pipeline rubber lined pipe and specially
Sensor.
It is unrealistic to carry out contact type measurement in the case where not influencing production, therefore surveyed using non-contact type ultrasonic
Measuring slurry flow characteristic is exactly optimal selection.The sensor that non-contact type ultrasonic flow measurement uses generally is formed by one group,
It is at an angle to be mounted on pipeline two sides, angle is generally 180 °, and one group of sensor is that a hair one is received or received and dispatched each other, emits
The signal of circuit output certain amplitude, certain frequency, this signal generate ultrasonic signal after being applied to emission sensor, receive
Sensing energy device, which is then realized, is transformed into electric signal the ultrasonic signal received, is transformed into after electric signal using amplification, filtering
Etc. processes realize extraction to ultrasonic echo signal, include flow information in signal, pipe can be obtained according to relevant algorithm
The flow of fluid in road.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of integral type ultrasonic sensors, in not shadow
It rings and is realized using ultrasonic flow measuring formula to compound pipeline complex pipeline by the design to sensor with installation method under the condition of production
Flow measurement.
The utility model provides a kind of integral type ultrasonic sensor, which includes:
Sound voussoir is isosceles trapezoid；
Damping layer is applied to for the mixture of silica gel and tungsten powder and uniformly on two inclined-planes of the sound voussoir；
Matching layer for epoxy resin and is flat and fit on the damping layer；
First piezoelectric element is flat and fit on the matching layer corresponding to one inclined-plane of the sound voussoir；
Second piezoelectric element is flat and fit on the matching layer corresponding to described another inclined-plane of sound voussoir；
First signal wire is welded to connect with first piezoelectric element；
Second signal line is welded to connect with second piezoelectric element；
Protective shell, inside it by the closing of the sound voussoir, first piezoelectric element and second piezoelectric element,
And the upper and lower surface correspondence of the sound voussoir is bonded with the upper and lower surface of the protective shell；
Cable-through hole is set to the top of the sound voussoir.
As a further improvement of the utility model, further include signal wire protective case, is hollow cylinder, the signal wire
Protective case runs through a side wall of the protective shell.
As a further improvement of the utility model, further include lock sleeve, is connect with signal wire protective case end
And extend the outside of the protective shell.
As a further improvement of the utility model, further include fixed ring, is sheathed on the signal wire protective case and institute
State the junction of lock sleeve.
As a further improvement of the utility model, the free end of first signal wire sequentially pass through the cable-through hole,
The signal wire protective case and the lock sleeve extend to outside the protective shell.
The free end of the second signal line sequentially passes through the signal wire and protects as a further improvement of the utility model,
Sheath and the lock sleeve extend to outside the protective shell.
As a further improvement of the utility model, further include matching impedance, is set to first signal wire and described
On second signal line.
It as a further improvement of the utility model, further include magnet A and magnet B, the two is respectively arranged on the protection
The both ends of shell lower surface.
The material of the sound voussoir is organic glass, the material of the protective shell as a further improvement of the utility model,
Matter is aluminium alloy, and first piezoelectric element and second piezoelectric element are PZT-5.0 piezoelectric ceramics circle sheet.
The damping layer is as a further improvement of the utility model, with a thickness of 1mm.
The utility model has the following beneficial effects: the sensing element by selecting suitable ultrasonic sensor, and ultrasound
The integrated design of wave sensor is conducive to improve measurement accuracy when flow velocity is slower or when non-full pipe；Simultaneously because this
Ultrasonic sensor described in utility model is transceiver, therefore can be used alone according to the actual situation, and can also combine makes
With, there is preferable versatility, it is applied widely, and installation and use are all very convenient.
Detailed description of the invention
Fig. 1 is a kind of integral type ultrasonic sensor structural schematic diagram described in the utility model embodiment；
Fig. 2 is a kind of temperature characteristics of integral type ultrasonic sensor described in the utility model embodiment；
Fig. 3 is a kind of impedance characteristic of integral type ultrasonic sensor described in the utility model embodiment；
Fig. 4 is a kind of operation schematic diagram of integral type ultrasonic sensor described in the utility model embodiment.
In figure,
1, magnet A；2, the first piezoelectric element；3, protective shell；4, the first signal wire；5, cable-through hole；6, sound voussoir；7, it matches
Impedance；8, the second piezoelectric element；9, signal wire protective case；10, fixed ring；11, lock sleeve；12, second signal line；13, magnet
B；14, compound pipeline complex pipeline；15, first sensor；16, second sensor；17, particulate matter in fluid.
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 integral type ultrasonic sensor, the supersonic sensing described in the utility model embodiment
Device includes:
Sound voussoir 6 is isosceles trapezoid.Selecting in the present embodiment is isosceles trapezoid that base angle is 33.5 °, is actually being answered
Its base angle size can also be designed as the case may be in.The tilt angle design of sound voussoir 6 is in order to avoid ultrasonic wave is in pipe
Stronger interaction is generated when propagating in road and fluid to echo, and improves signal strength.Two inclined-planes of sound voussoir 6 are processed into light
Sliding smooth inclined-plane, can be more advantageous to the fitting of damping layer.
Damping layer for the mixture of silica gel and tungsten powder and is uniformly applied on two inclined-planes of sound voussoir 6.Damping layer is
Suitable tungsten powder is participated in silica gel, is applied on two inclined-planes of sound voussoir 6 after evenly mixing, damping layer smearing thickness is 1mm,
Through desiccation in 48 hours.Silica gel is high impedance, highly attenuating sound-absorbing material, and the first piezoelectric element 2 and the second piezoelectricity member can be absorbed
The ultrasonic wave of 8 back side radiant of part is simultaneously converted into thermal energy, reduces the interference that back side radiant generates.
Matching layer for epoxy resin and is flat and fit on damping 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, make sound wave from the first piezoelectricity member
Projection coefficient when part 2 and the second piezoelectric element 8 are incident on sound voussoir 6 is improved.
First piezoelectric element 2 is flat and fit on the matching layer corresponding to 6 one inclined-planes of sound voussoir；
Second piezoelectric element 8 is flat and fit on the matching layer corresponding to another inclined-plane of sound voussoir 6；
The positive and negative anodes of the first piezoelectric element 2 and the second piezoelectric element 8 are set to the same side in the present embodiment, that is to say, that it is just
Cathode is arranged on the opposite face of the first piezoelectric element 2 and the second piezoelectric element 8 and matching layer binding face.
First signal wire 4 is welded to connect with the first piezoelectric element 2；
Second signal line 12 is welded to connect with the second piezoelectric element 8；
First signal wire 4 used in the present embodiment and second signal line 12 select dual shield cable, dual shield electricity
Cable can ensure signal quality, reduce interference of the noise to signal as far as possible.
Protective shell 3, inside it by the closing of sound voussoir 6, the first piezoelectric element 2 and the second piezoelectric element 8, and sound voussoir
6 upper and lower surface correspondence is bonded with the upper and lower surface of protective shell 3.
Protective shell 3 it is ensured that the sound voussoir 6 for posting the first piezoelectric element 2 and the second piezoelectric element 8 is completely placed into inside it,
So as to avoid external interference from reducing measurement error, keep measurement result more accurate.And by two parallel planes of sound voussoir 6
Be bonded placement with two parallel planes up and down of protective shell 3 respectively, be in order to make protective shell 3 to the packaging effect of sound voussoir 6 more
It is good, it avoids the occurrence of larger space and causes sound voussoir 6 that insecure influence measurement result is installed.
Cable-through hole 5 is set to the top of sound voussoir 6.Cable-through hole 5 is drawn in order to which the first signal wire 4 is passed through sound voussoir 6
Out, while also certain guaranteeing role is played to the first signal wire 4, avoid in use process the first signal wire 4 and sound voussoir 6 it
Between generate friction, in addition also make sensor inner wall winding displacement relatively clean and tidy more not in disorder.
Further, further include signal wire protective case 9, be hollow cylinder, signal wire protective case 9 is through protective shell 3
One side wall.
Further, further include lock sleeve 11, connect with 9 end of signal wire protective case and extend the outer of protective shell 3
Portion.
Further, further include fixed ring 10, be sheathed on the junction of signal wire protective case 9 and lock sleeve 11.
Further, the free end of the first signal wire 4 sequentially passes through cable-through hole 5, signal wire protective case 9 and lock sleeve 11 and prolongs
It reaches outside protective shell 3.
Further, the free end of second signal line 12 sequentially passes through signal wire protective case 9 and lock sleeve 11 extends to guarantor
Outside protective case 3.
Signal wire protective case 9, fixed ring 10 and lock sleeve 11 are for ensureing the first signal wire 4 and second signal line 12
It can be by being drawn safely in protective shell 3.
Further, further include matching impedance 7, be set on the first signal wire 4 and second signal line 12.In the first signal
It is to match the subsequent detection circuit to ultrasonic sensor that matching impedance 7 is arranged on line 4 and second signal line 12.
It further, further include magnet A 1 and magnet B 13, the two is respectively arranged on the both ends of 3 lower surface of protective shell.Magnet
A1 and magnet B 13 are for the ease of ultrasonic sensor to be adsorbed on compound pipeline complex pipeline to be measured.
Further, the material of sound voussoir 6 is organic glass, and the material of protective shell 3 is aluminium alloy, the first piezoelectric element 2
It is PZT-5.0 piezoelectric ceramics circle sheet with the second piezoelectric element 8.Organic glass is not only easily worked, but also below in 5MHz
When decay very little, while organic glass and workpiece acoustical coupling characteristic are good.Outside aluminium alloy protective shell 3 more traditional rubber or aluminum
The advantage that shell has intensity high, light-weight.First piezoelectric element 2 and the second piezoelectric element used in the utility model embodiment
8 characteristic, structure, size, by theoretical calculation, the direction of sound wave are improved for rubber lined pipe both for rubber lined pipe
Property.PZT-5.0 piezoelectric ceramics circle sheet vibrates along the thickness direction, and the ultrasonic wave of generation is longitudinal wave.The piezoelectric ceramics sensitivity and
Curie temperature is high, various parameters time stability is good, dielectric constant and electromechanical coupling factor with higher.
Further, damping layer is with a thickness of 1mm.
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.
As shown in figure 4, being integral type ultrasonic sensor installation method described in the utility model.
Since the ultrasonic sensor in the utility model is sending and receiving unitary design, first sensor 15 and the
Two sensors 16, which can work independently, to be independent of each other.But in view of the flux distribution characteristics of fluid in compound pipeline complex pipeline 14, therefore this
Utility model embodiment is provided with 16 two ultrasonic sensors of first sensor 15 and second sensor.And in actual condition
Multiple ultrasonic sensors can be set according to traffic needs.First sensor 15 and second sensor 16 are arranged by its bottom
Magnet A 1 and magnet B 13 be adsorbed on the bottom of compound pipeline complex pipeline 14.When work, first sensor 15 and second sensor 16
It works independently, the automatic switch in control first sensor 15 and second sensor 16 can be passed through when pipeline fluid flow speed stability
Selection first sensor 15 and second sensor 16 work independently, and first may be selected when flow velocity is unstable compared with slow or flow velocity and pass
Sensor 15 and second sensor 16 work at the same time, and can specifically carry out control selections according to the actual situation.In measurement compound pipeline complex pipeline 14
Fluid flow when be all made of frequency-difference method and carry out flow detection, driven using the sinusoidal sequence that signal generator generates standard when work
Dynamic emission sensor generates ultrasonic signal, and ultrasonic signal passes through fluid media (medium), after the solid particle reflection in fluid, receives
Sensor receives ultrasonic signal (echo-signal), changes the flow for calculating fluid according to the frequency of echo-signal, can by control
To select that the data of first sensor 15 or second sensor 16 can be used in flow speed stability, flow velocity is relatively slow or flow velocity not
First sensor 15 may be selected when stablizing and second sensor 16 works at the same time and by two groups of aggregation of data processing to improve measurement
Precision.
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 integral type ultrasonic sensor characterized by comprising
Sound voussoir (6), is isosceles trapezoid；
Damping layer is applied to for the mixture of silica gel and tungsten powder and uniformly on two inclined-planes of the sound voussoir (6)；
Matching layer for epoxy resin and is flat and fit on the damping layer；
First piezoelectric element (2) is flat and fit on the matching layer corresponding to (6) inclined-planes of the sound voussoir；
Second piezoelectric element (8) is flat and fit on the matching layer corresponding to described another inclined-plane of sound voussoir (6)；
First signal wire (4) is welded to connect with first piezoelectric element (2)；
Second signal line (12) is welded to connect with second piezoelectric element (8)；
Protective shell (3) closes the sound voussoir (6), first piezoelectric element (2) and second piezoelectric element (8)
Inside it, and the upper and lower surface of the sound voussoir (6) correspondence is bonded with the upper and lower surface of the protective shell (3)；
Cable-through hole (5) is set to the top of the sound voussoir (6).
2. integral type ultrasonic sensor according to claim 1, which is characterized in that it further include signal wire protective case (9),
It is hollow cylinder, and the signal wire protective case (9) runs through a side wall of the protective shell (3).
3. integral type ultrasonic sensor according to claim 2, which is characterized in that it further include lock sleeve (11), with
Signal wire protective case (9) end connects and extends the outside of the protective shell (3).
4. integral type ultrasonic sensor according to claim 3, which is characterized in that further include fixed ring (10), set
Set on the junction of the signal wire protective case (9) and the lock sleeve (11).
5. integral type ultrasonic sensor according to claim 3, which is characterized in that first signal wire (4) from
The cable-through hole (5), the signal wire protective case (9) and the lock sleeve (11) are sequentially passed through by end and extend to the protective shell
(3) external.
6. integral type ultrasonic sensor according to claim 3, which is characterized in that the second signal line (12) from
The signal wire protective case (9) is sequentially passed through by end and the lock sleeve (11) extends to the protective shell (3) outside.
7. integral type ultrasonic sensor according to claim 1, which is characterized in that further include matching impedance (7), set
In on first signal wire (4) and the second signal line (12).
8. integral type ultrasonic sensor according to claim 1, which is characterized in that further include magnet A (1) and magnet B
(13), the two is respectively arranged on the both ends of the protective shell (3) lower surface.
9. integral type ultrasonic sensor according to claim 1, which is characterized in that the material of the sound voussoir (6) is
Organic glass, the material of the protective shell (3) are aluminium alloy, first piezoelectric element (2) and second piezoelectric element (8)
For PZT-5.0 piezoelectric ceramics circle sheet.
10. integral type ultrasonic sensor according to claim 1, which is characterized in that the damping layer is with a thickness of 1mm.
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| CN201821421879.7U CN208653558U (en) | 2018-08-31 | 2018-08-31 | Integral type ultrasonic sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084852A (en) * | 2018-08-31 | 2018-12-25 | 大唐环境产业集团股份有限公司 | Integral type ultrasonic sensor and its installation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084852A (en) * | 2018-08-31 | 2018-12-25 | 大唐环境产业集团股份有限公司 | Integral type ultrasonic sensor and its installation method |
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