CN108680211A - A kind of gas ultrasonic flow sensor - Google Patents
A kind of gas ultrasonic flow sensor Download PDFInfo
- Publication number
- CN108680211A CN108680211A CN201811007877.8A CN201811007877A CN108680211A CN 108680211 A CN108680211 A CN 108680211A CN 201811007877 A CN201811007877 A CN 201811007877A CN 108680211 A CN108680211 A CN 108680211A
- Authority
- CN
- China
- Prior art keywords
- liner plate
- piezoelectric unit
- casting glue
- shell
- ultrasonic flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of gas ultrasonic flow sensors, including shell, piezoelectric unit, matching piece, liner plate and casting glue；Matching piece is fixedly installed on outer housing bottom inside, and piezoelectric unit is fixedly connected with piece is matched；Liner plate support setting is divided into sealing area and working region inside the shell and by enclosure, matches piece and piezoelectric unit is located at below liner plate and in working region；Casting glue perfusion is arranged in sealing area and above liner plate, and liner plate, piezoelectric unit and matching piece sealing are arranged inside the shell casting glue；Signal wire upwardly penetrates through liner plate from piezoelectric unit and casting glue extends shell；Between liner plate and piezoelectric unit inside the housing in vertical direction clearance fit and between form air layer；Its structural strength is big, good seal performance, and the sealing to piezoelectric element can be effectively ensured, and solves the shearing force that each component coefficient of expansion is brought；And the original resolution ratio of product is not reduced while promoting sensitivity.
Description
Technical field
The present invention relates to sensor technical field, more particularly to a kind of gas ultrasonic flow sensor.
Background technology
Ultrasonic flowmeter is to measure the device of the fluid flows such as gas, liquid, and ultrasonic sensor is supersonic flow
One of key component of gauge.Ultrasonic sensor need to be provided specific oscillator signal by external power supply when working, sensor receives
Oscillator signal is converted to ultrasonic wave, then by sensor emission to air；Believe conversely, sensor receives ultrasonic wave in air
Number, and specific electric signal transmission is converted to system.
In the prior art, the effect of existing ultrasonic sensor is to convert mechanical energy into electric energy, that is to say, that by arteries and veins
It rushes ultrasonic signal existing for form and is converted into electric impulse signal comprising shell and signal wire, and set from the bottom to top successively
It is placed in the matching layer, piezoelectric patches, backing and casting glue of bottom in shell.Wherein, one section of connection piezoelectric patches of signal wire is upper and lower
Electrode, and backing is penetrated successively from piezoelectric patches and casting glue extends out.Wherein, between piezoelectric patches and the bottom of shell often
Using the glue formed by thickness control program as the matching layer between piezoelectric patches and shell.It is the resolution ratio of signal, sensitive
Degree and stability have direct influence to piezoelectric patches processing；Simultaneously according to the use environment of sensor, it is also necessary to which itself is to piezoelectricity
Piece has the protective capability of high intensity.And resolution ratio, sensitivity, voltage endurance capability are in the presence of mutually restriction.Moreover, existing ultrasonic wave
Sensor majority uses gluing structure, since the aging of glue is fast and cannot solve the shearing force that each component coefficient of expansion brings,
All cold and hot variations will soon degumming to allow faulty sensor.And existing ultrasonic sensor mostly only with the shell of sensor
Body formed plane contact, during long-time use, easily cause it is poorly sealed, make moist by it is wet phenomena such as, so as to cause pressure
Electric device sensitivity is low, and reaction speed is slack-off, and then influences the reliability and service life of ultrasonic flow sensor.
Invention content
In view of this, the present invention provides a kind of gas ultrasonic flow sensor, structural strength is big, good seal performance,
The sealing to piezoelectric element can be effectively ensured, solve the shearing force that each component coefficient of expansion is brought；And promoting sensitivity
The original resolution ratio of product is not reduced simultaneously.
The ultrasonic flow sensor of the present invention, including：
Shell；
Piezoelectric unit is arranged in the outer housing and realizes transducing for signal conversion；
Piece is matched, is fixedly installed on outer housing bottom inside, piezoelectric unit is fixedly connected with the piece that matches；
Liner plate, support are arranged in the shell and enclosure are divided into sealing area and working region, the matching piece
It is located at below liner plate and in the working region with the piezoelectric unit；
Casting glue, perfusion are arranged in the sealing area and above the liner plates, the casting glue by liner plate, piezoelectric unit and
Match the setting of piece sealing inside the shell；
Signal wire upwardly penetrates through liner plate from piezoelectric unit and casting glue extends shell；
Between the liner plate and the piezoelectric unit inside the housing in vertical direction clearance fit and between form air layer.
Further, shell includes base sheath and outer female connector, is placed on base sheath in the outer female connector lower part and is fixedly connected, institute
It states clearance fit between the lower face of outer female connector and the liner plate and forms the end face space flowed into for casting glue, the casting glue
Include the end face seal portion in the space of end face and is integrally formed with end face seal portion and is located at the primary seal portion in outer female connector.
Further, its end face seal portion outer circle when being provided at base sheath corresponding end surface spatial position for casting glue to be perfused
First closure gasket groove of week embedded cooperation.
Further, the radial section of the first closure gasket groove is L-shaped groove.
Further, second sealing ring of the setting at least one for the primary seal portion insertion cooperation of casting glue in outer female connector
Slot.
Further, the shoulder for installing liner plate is provided in base sheath, first closure gasket groove is located at the shoulder
Top.
Further, the annular flange for forming limit cooperation with the end face of base sheath is provided on the outside of outer female connector.
Further, shell is made of metal material；The matching piece is plastic cement material.
Beneficial effects of the present invention：The ultrasonic flow sensor of the present invention, structural strength is big, good seal performance, energy
The sealing to piezoelectric element is effectively ensured, solves the shearing force that each component coefficient of expansion is brought；Between liner plate and piezoelectric unit
Air layer is formed, does not reduce the original resolution ratio of product while promoting sensitivity；And sensor internal sealing stable structure,
While keeping product high sensitivity and high-resolution, resistance to external shocks ability greatly promotes, and can preferably protect piezoelectricity
The validity of piece and ultrasonic transmission, product have higher reliability.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is overall structure of the present invention.
Specific implementation mode
Technical solution in the embodiment of the present invention that following will be combined with the drawings in the embodiments of the present invention carries out clear, complete
Description, it is clear that described embodiment be only the present invention a part of the embodiment, instead of all the embodiments.It is based on
The embodiment of the present invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction of institute in the embodiment of the present invention（Such as up, down, left, right, before and after ...）Only use
In a certain particular pose of explanation（As shown in the picture）Under relative position relation, motion conditions etc. between each component, if the spy
When determining posture and changing, then directionality instruction also correspondingly changes correspondingly.
In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and should not be understood as referring to
Show or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " are defined as a result,
Two " feature can explicitly or implicitly include at least one of the features.In addition, the technical solution between each embodiment can
To be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution occurs
Conflicting or cannot achieve when, will be understood that the combination of this technical solution is not present, also not the present invention claims protection model
In enclosing.
The present invention proposes a kind of gas ultrasonic flow sensor.
Referring to Fig.1, Fig. 1 is overall structure of the present invention, as shown in the figure：The ultrasonic flow of the present embodiment senses
Device, including：
Shell；Shell is made of metal material, and is effectively protected to piezoelectric unit formation；Shell can be cylinder, also may be used
To be cross section as polygon or the column of other closed curves；
Piezoelectric unit 1 is arranged in the outer housing and realizes transducing for signal conversion；Piezoelectric unit 1 includes anode, cathode
And the piezoelectric ceramics between positive electrode and negative electrode；
Piece 2 is matched, is fixedly installed on outer housing bottom inside, piezoelectric unit 1 is fixedly connected with the piece 2 that matches；
Liner plate 3, support are arranged in the shell and enclosure are divided into sealing area and working region, the matching piece
2 and the piezoelectric unit 1 be located at the lower section of liner plate 3 and in the working region；Shell is the closed column in lower part, liner plate
Housing interior volume is separated into two parts by 3, wherein upper space forms sealing area, and for casting glue to be perfused, lower part is formed
Working region, for installing piezoelectric unit 1, piezoelectric unit 1 receives oscillator signal and is converted to ultrasonic wave, then by sensor emission to
In air；Conversely, sensor receives ultrasonic signal in air, and specific electric signal transmission is converted to system；
Casting glue 4, perfusion are arranged in the sealing area and above the liner plates 3, and the casting glue 4 is by liner plate 3, piezoelectricity list
Member 1 and the setting of matching 2 sealing of piece are inside the shell；Signal wire 5 upwardly penetrates through liner plate 3 from piezoelectric unit 1 and casting glue 4 extends
Shell；Signal wire is connect with piezoelectric unit 1；Between the liner plate 3 and the piezoelectric unit 1 inside the housing in vertical direction between
Gap forms air layer between matching merging；Air layer is formed between liner plate 3 and piezoelectric unit 1, while promoting sensitivity not
Reduce the original resolution ratio of product；And sensor internal sealing stable structure, keeping product high sensitivity and high-resolution
Meanwhile resistance to external shocks ability greatly promotes, and the validity of piezoelectric patches and ultrasonic transmission, product can preferably be protected to have
Higher reliability.
In the present embodiment, shell includes base sheath 6 and outer female connector 7, and base sheath 6 is placed in 7 lower part of outer female connector and is consolidated
Fixed connection, it is empty to form the end face flowed into for casting glue 4 for clearance fit between the lower face and the liner plate 3 of the outer female connector 7
Between, the casting glue 4 includes the end face seal portion 8 being located in the space of end face and is integrally formed and is located at outer with end face seal portion 8
Primary seal portion in female connector 7.Its end face seal when being provided at 6 corresponding end surface spatial position of base sheath for casting glue 4 to be perfused
First closure gasket groove of portion's 8 excircle insertion cooperation.The radial section of first closure gasket groove is L-shaped groove.It is arranged extremely in outer female connector 7
Second closure gasket groove of the few one primary seal portion insertion cooperation for casting glue 4.
I.e. in the filling casting glue 4 of sealing area, colloid not only flows into the space of end face, and flows into the from end face space
In one closure gasket groove so that the end face seal portion 8 of formation is embedded in the first closure gasket groove, i.e., end face seal portion 8 by outer female connector 7 with
Connecting sewing between base sheath 6 forms sealing, and leakproofness greatly improves；And since the first closure gasket groove is L-shaped groove, casting glue 4
After flowing into the first closure gasket groove, preferable connection effect is formed, is not only not easy to loosen, and leakproofness is further enhanced,
It can bear higher shearing force, casting glue 4 and be embedded in the second closure gasket groove by the body seal portion of casting glue 4 so that be filled
Sealing 4 forms preferable globality with shell, is not easy to loosen, and ensure that the sensitivity of piezoelectric element in turn, reaction speed is steady
It is fixed, and then ensure the reliability and service life of ultrasonic flow sensor.
In the present embodiment, the shoulder for installing liner plate 3 is provided in base sheath 6, first closure gasket groove is located at institute
State the top of shoulder.In the present embodiment, the outside of outer female connector 7 is provided with for forming limit cooperation with the end face of base sheath 6
Annular flange 9.In the present embodiment, shell is made of metal material；The matching piece 2 is plastic cement material.The present invention is in whole dress
Matching piece 2 and piezoelectric unit 1 are assembled in the base sheath 6 of shell by timing, and then the positioning of liner plate 3 is supported on shoulder, then
Outer female connector 7 is connect with base sheath 6, outer female connector 7 can take threaded connection in base sheath 6, and outer female connector 7 is connect with base sheath 6
When, the annular flange of outer female connector 7 forms positioning when supporting the upper surface for terminating in base sheath 6, the lower face and liner plate 3 of outer female connector 7 it
Between form rational end face space, form stable and reliable connection relation, be then fed into casting glue 4 using glue-pouring device
In outer female connector 7, and casting glue 4 is squeezed into the first closure gasket groove and the second closure gasket groove by pressure, forms preferable sealing
Property and integrated connection property.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the right of invention.And based on the embodiment of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of the every other embodiment that is obtained, shall fall within the protection scope of the present invention.It is to be appreciated that the present invention is implemented
The directional instruction of institute in example（Such as up, down, left, right, before and after ...）It is only used for explaining a certain particular pose（Such as attached drawing institute
Show）Under relative position relation, motion conditions etc. between each component, if the particular pose changes, directionality
Instruction also correspondingly changes correspondingly.In addition, the description for being related to " first ", " second " etc. in the present invention is used for description purposes only,
It is not understood to indicate or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic.It limits as a result,
There is the feature of " first ", " second " can explicitly or implicitly include at least one of the features surely.In addition, each embodiment it
Between technical solution can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, work as technology
There is conflicting or cannot achieve when and will be understood that the combination of this technical solution is not present in the combination of scheme, also not in this hair
In the protection domain of bright requirement.
Claims (8)
1. a kind of gas ultrasonic flow sensor, it is characterised in that：Including：
Shell；
Piezoelectric unit is arranged in the outer housing and realizes transducing for signal conversion；
Piece is matched, is fixedly installed on outer housing bottom inside, piezoelectric unit is fixedly connected with the piece that matches；
Liner plate, support are arranged in the shell and enclosure are divided into sealing area and working region, the matching piece
It is located at below liner plate and in the working region with the piezoelectric unit；
Casting glue, perfusion are arranged in the sealing area and above the liner plates, the casting glue by liner plate, piezoelectric unit and
Match the setting of piece sealing inside the shell；
Signal wire upwardly penetrates through liner plate from piezoelectric unit and casting glue extends shell；
Between the liner plate and the piezoelectric unit inside the housing in vertical direction clearance fit and between form air layer.
2. gas ultrasonic flow sensor according to claim 1, it is characterised in that：The shell include base sheath and
Outer female connector is placed on base sheath in the outer female connector lower part and is fixedly connected, between the lower face and the liner plate of the outer female connector
Clearance fit forms the end face space flowed into for casting glue, and the casting glue includes the end face seal portion being located in the space of end face
Be integrally formed with end face seal portion and be located at the primary seal portion in outer female connector.
3. gas ultrasonic flow sensor according to claim 2, it is characterised in that：The base sheath corresponding end surface is empty
Between when being provided with for casting glue to be perfused at position its end face seal portion excircle insertion cooperation the first closure gasket groove.
4. gas ultrasonic flow sensor according to claim 3, it is characterised in that：The diameter of first closure gasket groove
It is L-shaped groove to section.
5. gas ultrasonic flow sensor according to claim 3, it is characterised in that：It is arranged at least in the outer female connector
Second closure gasket groove of one primary seal portion insertion cooperation for casting glue.
6. gas ultrasonic flow sensor according to claim 5, it is characterised in that：Setting is useful in the base sheath
In the shoulder of installation liner plate, first closure gasket groove is located at the top of the shoulder.
7. gas ultrasonic flow sensor according to claim 6, it is characterised in that：The outside of the outer female connector is arranged
It is useful for forming the annular flange of limit cooperation with the end face of base sheath.
8. gas ultrasonic flow sensor according to claim 7, it is characterised in that：The shell is by metal material system
At；The matching piece is plastic cement material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007877.8A CN108680211A (en) | 2018-08-31 | 2018-08-31 | A kind of gas ultrasonic flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811007877.8A CN108680211A (en) | 2018-08-31 | 2018-08-31 | A kind of gas ultrasonic flow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108680211A true CN108680211A (en) | 2018-10-19 |
Family
ID=63815618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811007877.8A Pending CN108680211A (en) | 2018-08-31 | 2018-08-31 | A kind of gas ultrasonic flow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108680211A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202084724U (en) * | 2011-04-29 | 2011-12-21 | 中航光电科技股份有限公司 | High-voltage sealed electric connector |
| JP4881730B2 (en) * | 2003-07-21 | 2012-02-22 | 株式会社堀場製作所 | Acoustic transducer |
| CN202171478U (en) * | 2011-08-17 | 2012-03-21 | 李志慧 | Probe of ultrasonic flowmeter |
| CN202712567U (en) * | 2012-05-28 | 2013-01-30 | 中航光电科技股份有限公司 | Cable glue-pouring sealing structure and connector component |
| CN103471763A (en) * | 2013-08-29 | 2013-12-25 | 青岛航天半导体研究所有限公司 | Fixing device of leading-out cable of pressure sensor |
| CN107356300A (en) * | 2017-09-07 | 2017-11-17 | 上海诺仪表有限公司 | A kind of ultrasonic flowmeter |
| CN107990924A (en) * | 2017-12-07 | 2018-05-04 | 广东奥迪威传感科技股份有限公司 | A kind of ultrasonic sensor |
| CN108435521A (en) * | 2018-03-12 | 2018-08-24 | 肇庆奥迪威传感科技有限公司 | A kind of ultrasonic sensor |
-
2018
- 2018-08-31 CN CN201811007877.8A patent/CN108680211A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4881730B2 (en) * | 2003-07-21 | 2012-02-22 | 株式会社堀場製作所 | Acoustic transducer |
| CN202084724U (en) * | 2011-04-29 | 2011-12-21 | 中航光电科技股份有限公司 | High-voltage sealed electric connector |
| CN202171478U (en) * | 2011-08-17 | 2012-03-21 | 李志慧 | Probe of ultrasonic flowmeter |
| CN202712567U (en) * | 2012-05-28 | 2013-01-30 | 中航光电科技股份有限公司 | Cable glue-pouring sealing structure and connector component |
| CN103471763A (en) * | 2013-08-29 | 2013-12-25 | 青岛航天半导体研究所有限公司 | Fixing device of leading-out cable of pressure sensor |
| CN107356300A (en) * | 2017-09-07 | 2017-11-17 | 上海诺仪表有限公司 | A kind of ultrasonic flowmeter |
| CN107990924A (en) * | 2017-12-07 | 2018-05-04 | 广东奥迪威传感科技股份有限公司 | A kind of ultrasonic sensor |
| CN108435521A (en) * | 2018-03-12 | 2018-08-24 | 肇庆奥迪威传感科技有限公司 | A kind of ultrasonic sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8596139B2 (en) | Ultrasonic transducer for use in a fluid medium | |
| CN206670840U (en) | A kind of small-sized silicon piezoresistance type gas pressure sensor structure | |
| CN104510330B (en) | Pressure sensor and pressure cooker | |
| CN209417074U (en) | A kind of piezoelectricity velocity sensor | |
| CN108680211A (en) | A kind of gas ultrasonic flow sensor | |
| CN110174209A (en) | Media-isolated pressure sensor | |
| CN204964102U (en) | Pressure sensor | |
| US20220178773A1 (en) | Pressure sensor and packaging method thereof | |
| CN105784252B (en) | A kind of overall structure cake type free-field blast pressure "pencil" sensor | |
| CN108168491A (en) | A kind of erecting device for being used to measure turbine blade-tip gap sensor | |
| CN211668580U (en) | Precession vortex type gas flow piezoelectric sensor | |
| CN209400124U (en) | Pressure sensor chip and the Multifunction Sensor for being provided with the chip | |
| JP2009281915A (en) | Temperature sensor integrated type pressure sensor device | |
| CN206541738U (en) | A kind of capacitor of achievable expansion automatic detection | |
| CN205506203U (en) | High pressure resistant spherical hydrophone | |
| CN204269262U (en) | Multidirectional concrete dynamic stress monitoring sensor | |
| CN205562089U (en) | Ultra -thin pressure sensor | |
| CN209069886U (en) | A kind of probe encapsulating structure | |
| CN205642678U (en) | Multi -seal type pressure sensor | |
| CN209264133U (en) | Temperature sensor fixture | |
| CN207816492U (en) | A kind of pressure resistance type ceramics tension sensor | |
| CN202562634U (en) | Intake-temperature pressure transducer | |
| CN206362482U (en) | A kind of baroceptor | |
| CN112153528B (en) | Vector hydrophone of composite cymbal type piezoelectric ceramic transducer | |
| CN212513133U (en) | Quick response temperature and pressure composite sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181019 |