CN208275714U - A kind of ultrasonic sensor - Google Patents
A kind of ultrasonic sensor Download PDFInfo
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- CN208275714U CN208275714U CN201820339400.9U CN201820339400U CN208275714U CN 208275714 U CN208275714 U CN 208275714U CN 201820339400 U CN201820339400 U CN 201820339400U CN 208275714 U CN208275714 U CN 208275714U
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Abstract
The utility model provides a kind of ultrasonic sensor, including shell, fixation kit and piezoelectric ceramic piece, the shell it is open at one end, and cavity is equipped in the shell, the piezoelectric ceramic piece is set on the bottom of the cavity；The fixation kit includes fixing piece and supporting element, the fixing piece is mounted on the open end of the shell, one end of the supporting element is connected to the fixing piece towards on the end surface of the piezoelectric ceramic piece, and the other end of the supporting element is resisted against the piezoelectric ceramics on piece；Open up fluted in the supporting element, the groove is between the fixing piece and the piezoelectric ceramic piece.Ultrasonic sensor provided by the utility model effectively can simplify technique and realize the free vibration of piezoelectric ceramic piece, to improve sensitivity.
Description
Technical field
The utility model relates to ultrasonic technology fields, more particularly, to a kind of ultrasonic sensor.
Background technique
Currently, ultrasonic sensor is the sensor developed using the characteristic of ultrasonic wave, by being mounted on shell
Interior piezoelectric ceramic vibration realizes piezoelectricity conversion function, mode of oscillation and Oscillation Amplitude relationship of the piezoelectric ceramics inside shell
To entire sensor electrical property convert validity, the load of piezoelectric ceramics is fewer, vibrate it is freer, internal consumption it is useless
Function is fewer, and the sensitivity of sensor is bigger.
In the prior art, ultrasonic sensor is generally made using piezoelectric ceramic piece, wherein the one of piezoelectric ceramic piece
Face needs to be attached in shell by patch glue, and another side then adds the acoustical cotton of softening, adds encapsulating glue then to reach
To protection, waterproof and shockproof purpose.But the dosage of patch glue is difficult to control, it is easy to be overflowed and is bonded in piezoelectricity pottery
On tile surface, lead to the vibration for fettering piezoelectric ceramics；And the addition of acoustical cotton then can make technique increasingly complex, while encapsulating
Glue can become the load for influencing piezoelectric ceramic piece vibration, and the sensitivity of ultrasonic sensor product is caused to decline.
Utility model content
The utility model embodiment provides a kind of ultrasonic sensor, to solve existing ultrasonic sensor due to shell
It is added to patch glue, encapsulating glue, acoustical cotton in vivo to make complex process and influence the vibration of piezoelectric ceramic piece, cause sensitive
The technical issues of degree decline, to effectively simplify technique and realize the free vibration of piezoelectric ceramic piece, and then improves ultrasonic wave
The sensitivity of sensor.
In order to solve identical technical problem, the utility model provides a kind of ultrasonic sensor, including shell, fixed group
Part and piezoelectric ceramic piece, the shell it is open at one end, and cavity is equipped in the shell, the piezoelectric ceramic piece is set to described
On the bottom of cavity；The fixation kit includes fixing piece and supporting element, and the fixing piece is mounted on the open end of the shell
On, one end of the supporting element is connected to the fixing piece towards on the end surface of the piezoelectric ceramic piece, the supporting element
The other end be resisted against the piezoelectric ceramics on piece；Open up fluted in the supporting element, the groove is located at the fixing piece
Between the piezoelectric ceramic piece.
Preferably, the ultrasonic sensor further includes control circuit board and signal wire, is set in the fixing piece
There are placed cavity and signal line passage, the signal line passage is connected to the placed cavity；
The control circuit board is set in the placed cavity, and the signal wire is set in the signal line passage, the control
One end of circuit board processed is electrically connected with the signal wire, and the other end of the control circuit board passes through conducting wire and the piezoelectric ceramics
Piece electrical connection.
Preferably, the other end of the supporting element extends along the side wall of the piezoelectric ceramic piece and forms the first peace
Tankage, the outer side wall surface of the piezoelectric ceramic piece are resisted against in the interior side-wall surface of first mounting groove；
The area of section of first mounting groove be greater than the groove area of section, and first mounting groove with it is described
It is formed with first step portion before groove, is resisted against at the top of the piezoelectric ceramic piece in the first step portion, the piezoelectricity
The bottom of potsherd is resisted against on the bottom of the cavity.
Preferably, the cross section of the supporting element, the shape of first mounting groove and the piezoelectricity are made pottery
The shape of tile is adapted, and the other end end edge of the supporting element is equipped with several solder joint slots.
Preferably, the supporting element includes the first support portion and the second support portion being oppositely arranged；
One end of first support portion is fixed on the fixing piece towards on the end surface of the piezoelectric ceramic piece, institute
The other end for stating the first support portion is resisted against on the top surface of the piezoelectric ceramic piece, and one end of second support portion is fixed
On end surface of the fixing piece towards the piezoelectric ceramic piece, the other end of second support portion is resisted against the pressure
On the top surface of electroceramics piece, the bottom of the piezoelectric ceramic piece is resisted against on the bottom of the cavity.
Preferably, the supporting element further includes third support portion and the 4th support portion, the third support portion and
4th support portion is formed to the central concave of the groove, to be formed for conducting wire to be fixed on the piezoelectric ceramic piece
Top surface on bond pad locations；
One end of the third support portion is fixed on the fixing piece towards on the end surface of the piezoelectric ceramic piece, institute
The other end for stating third support portion is resisted against on the top surface of the piezoelectric ceramic piece, and one end of the 4th support portion is fixed
On end surface of the fixing piece towards the piezoelectric ceramic piece, the other end of the 4th support portion is resisted against the pressure
On the top surface of electroceramics piece；
The side of first support portion is connect by the third support portion with the side of second support portion, described
The other side of first support portion is connect by the 4th support portion with the other side of second support portion.
Preferably, first support portion, second support portion, the third support portion, 4th described
The section of support part is arc-shaped.
Preferably, the central axis of the piezoelectric ceramic piece is overlapped with the central axis of the supporting element, and institute
It is all the same to state the first support portion, second support portion, the third support portion, the height of the 4th support portion.
Preferably, the other end of the other end of first support portion and second support portion is along the pressure
The side wall of electroceramics piece extends and is formed the second mounting groove, and the outer side wall surface of the piezoelectric ceramic piece is resisted against second peace
In the interior side-wall surface of tankage；
The area of section of second mounting groove be greater than the groove area of section, and second mounting groove with it is described
It is formed with second step portion before groove, is resisted against at the top of the piezoelectric ceramic piece in the second step portion, the piezoelectricity
The bottom of potsherd is resisted against on the bottom of the cavity.
Preferably, the other end end of the other end end edge of first support portion and second support portion
Portion edge is equipped with several solder joint slots.
Compared with the prior art, the beneficial effect of the utility model embodiment is, by the supporting element by the pressure
Electroceramics piece is fixed on the bottom of the cavity, without using patch glue and encapsulating glue, so as to avoid piezoelectric ceramics
Piece leads to the vibration for fettering piezoelectric ceramics since patch glue overflows and is bonded on piezoelectric ceramic piece surface；Connected using sealing
Mode is connect, the fixing piece is mounted on the open end of the shell, the infiltration of completely isolated encapsulating and/or patch glue is capable of
Thoroughly, and by the piezoelectric ceramic piece position of most enlivening vibrated is isolated with external environment, so that the piezoelectric ceramic piece
Top is unfettered, to realize free vibration, and then improves the sensitivity of the ultrasonic sensor；The supports support
The piezoelectric ceramic piece, and the shell has defencive function, to be conducive to be promoted the compression strength of ultrasonic sensor；Together
When, open up in the supporting element fluted, the groove is between the fixing piece and the piezoelectric ceramic piece, the groove
The contact range of the supporting element Yu the piezoelectric ceramic piece can be reduced, to reduce the constraint of the piezoelectric ceramic piece
Power, and then improve the sensitivity of the ultrasonic sensor；In addition, in the cavity without using the acoustical cotton of softening, from
And technique is effectively simplified, thereby reduce cost of manufacture.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the first embodiment of the utility model ultrasonic sensor；
Fig. 2 a~2d illustrates the assembling structure of fixation kit and piezoelectric ceramic piece in first embodiment in Fig. 1, wherein
Fig. 2 a is the cross-sectional view of Fig. 2 c, and Fig. 2 b is the cross-sectional view of Fig. 2 d；
Fig. 3 is the cross-sectional view of the second embodiment of the utility model ultrasonic sensor；
Fig. 4 a~4d illustrates the assembling structure of fixation kit and piezoelectric ceramic piece in first embodiment in Fig. 3, wherein
Fig. 4 a is the cross-sectional view of Fig. 4 c, and Fig. 4 b is the cross-sectional view of Fig. 4 d；
Fig. 5 is the cross-sectional view of the third embodiment of the utility model ultrasonic sensor；
Fig. 6 a~6d illustrates the assembling structure of fixation kit and piezoelectric ceramic piece in first embodiment in Fig. 5, wherein
Fig. 6 a is the cross-sectional view of Fig. 6 c, and Fig. 6 b is the cross-sectional view of Fig. 6 d；
Wherein, 1, shell；2, fixation kit；21, supporting element；211, first step portion；212, second step portion；213,
One support portion；214, the second support portion；215, third support portion；22, fixing piece；23, groove；3, piezoelectric ceramic piece；4, signal
Line.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, the preferred embodiment in the utility model provides a kind of ultrasonic sensor, including shell 1, fixation kit
2 and piezoelectric ceramic piece 3；The shell 1 it is open at one end, and cavity is equipped in the shell 1, the piezoelectric ceramic piece 3 is set to
On the bottom of the cavity；The fixation kit 2 includes fixing piece 22 and supporting element 21, and the fixing piece 22 is mounted on the shell
On the open end of body 1, one end of the supporting element 21 is connected to the fixing piece 22 towards one end table of the piezoelectric ceramic piece 3
On face, the other end of the supporting element 21 is resisted against on the piezoelectric ceramic piece 3；Fluted 23 are opened up in the supporting element 21,
The groove 23 is between the fixing piece 22 and the piezoelectric ceramic piece 3.
In the utility model embodiment, the piezoelectric ceramic piece 3 is fixed on by the shell 1 by the supporting element 21
On bottom in cavity, without using patch glue and encapsulating glue, so as to avoid piezoelectric ceramic piece 3 since patch glue overflows
It out and is bonded on 3 surface of piezoelectric ceramic piece, leads to the vibration for fettering piezoelectric ceramics；It, will be described solid using the mode of sealed connection
Determine part 22 to be mounted on the open end of the shell 1, can completely isolated encapsulating and/or the infiltration of patch glue, and will be described
The position of most enlivening that piezoelectric ceramic piece 3 vibrates is isolated with external environment, so that the top of the piezoelectric ceramic piece 3 is not by about
Beam to realize free vibration, and then improves the sensitivity of the ultrasonic sensor；The supporting element 21 supports the piezoelectricity
Potsherd 3, and the shell 1 has defencive function, to be conducive to be promoted the compression strength of ultrasonic sensor；Meanwhile institute
It states and opens up fluted 23 in supporting element 21, the groove 23 is described between the fixing piece 22 and the piezoelectric ceramic piece 3
Groove 23 can reduce the contact range of the supporting element 21 and the piezoelectric ceramic piece 3, to reduce the piezoelectric ceramics
The binding force of piece 3, and then improve the sensitivity of the ultrasonic sensor；In addition, without using softening in the cavity
Acoustical cotton thereby reduce cost of manufacture to effectively simplify technique.
In the present embodiment, it should be noted that the piezoelectric ceramic piece 3 is the high frequency oscillator of ultrasonic sensor, because
The vibration source of high-frequency vibration occurs as the ultrasonic sensor for this.The ultrasonic sensor being made of the piezoelectric ceramic piece 3
It is bilateral transducer, the piezoelectric ceramic piece 3 can convert electric energy into mechanical oscillation and generate ultrasonic wave, while the piezoelectricity
It when potsherd 3 receives ultrasonic wave, can also be transformed into electric energy, be applicable to the purposes such as ranging, remote control, antitheft；Such as
Reversing DAS (Driver Assistant System), medical system etc..Ultrasonic sensor can drive the piezoelectric ceramic piece 3 using electric signal, described
Piezoelectric ceramic piece 3 vibrates under the excitation of voltage, and the shell 1 contacted therewith vibration is driven to issue ultrasonic wave.Due to super
Sound wave good directionality, can be with direction propagation, and significant back wave can be generated by encountering interface, and by receiving reflected ultrasound
Ultrasonic signal is converted into electric signal and amplifies filtering, is converted into digital signal later by wave, will have the number of range information
Signal is transferred to the control circuit board, to complete ranging process.In addition, the material of the shell 1 includes but is not limited to gold
Belong to material other materials.
In the utility model embodiment, the ultrasonic sensor further includes control circuit board (not shown) and signal wire
4, the fixing piece 22 is interior to be equipped with placed cavity and signal line passage, and the signal line passage is connected to the placed cavity；The control
Circuit board processed is set in the placed cavity, and the signal wire 4 is set in the signal line passage, one end of the control circuit board
It is electrically connected with the signal wire 4, the other end of the control circuit board is electrically connected by conducting wire with the piezoelectric ceramic piece 3.It will
The control circuit board is placed in the placed cavity, and when the fixing piece 22 is metal material, screen can be played to circuit
The effect of covering reduces extraneous interference, improves the signal-to-noise ratio of signal, while reducing cost.
In the present embodiment, it should be noted that the piezoelectric ceramic piece 3 as inverting element and with the control circuit
Plate electrical connection can be controlled the piezoelectric ceramic piece 3 by the control circuit board and send ultrasonic signal or acquisition ultrasonic wave letter
Number, signal parameter corresponding with the signal that the piezoelectric ceramic piece 3 acquires is obtained, and by the control circuit board to the signal
Parameter is handled, and is directly generated measured.Signal without acquiring ultrasonic sensor carries out long distance transmission, saves and passes
Error brought by the propagation delay of signal can be reduced while defeated line, can effectively avoid the unstable factor of external environment to letter
Number propagate influence, to improve the reliability and measurement accuracy of ultrasonic sensor.
It should be understood that the control circuit board uses flexible circuit board, since flexible circuit board has biggish pad,
To be easy to the connection of electric wire Yu the piezoelectric ceramic piece 3, and it can effectively simplify and conducting wire is fixed on the piezoelectric ceramics
Technique on the end surface of piece 3.
Fig. 1 and Fig. 2 a~2d is please referred to, introduces the first embodiment party of the ultrasonic sensor of the utility model in detail below
Formula.
In the present embodiment, the other end of the supporting element 21 extends along the side wall of the piezoelectric ceramic piece 3 and forms
One mounting groove, the outer side wall surface of the piezoelectric ceramic piece 3 are resisted against in the interior side-wall surface of first mounting groove；Described
The area of section of one mounting groove is greater than the area of section of the groove 23, and shape before first mounting groove and the groove 23
At there is first step portion 211, the top of the piezoelectric ceramic piece 3 is resisted against in the first step portion 211, the piezoelectric ceramics
The bottom of piece 3 is resisted against on the bottom in 1 cavity of shell.
In the present embodiment, the piezoelectric ceramic piece 3 structure in a ring, the shape of first mounting groove and the piezoelectricity
The shape of potsherd 3 is adapted, therefore, can by 3 part of piezoelectric ceramic piece accommodate with first mounting groove in so that institute
It states between the bottom that piezoelectric ceramic piece 3 is fixed in 1 cavity of the first step portion 211 and the shell.The groove 23
In the top of the piezoelectric ceramic piece 3, to effectively reduce the contact model of the fixing piece 22 with the piezoelectric ceramic piece 3
It encloses, thereby reduces 3 binding force of piezoelectric ceramic piece, greatly improve the sensitivity of the ultrasonic sensor.
It should be understood that the outer side wall surface of the piezoelectric ceramic piece 3 is resisted against the inner sidewall table of first mounting groove
On face, so that the piezoelectric ceramic piece 3 is adjacent in first mounting groove, to prevent the piezoelectric ceramic piece 3 from shaking
It is dynamic, and then improve the piezoelectric ceramic piece 3 and be mounted on the stability in shell 1.
Further, the cross section of the supporting element 21, the shape of first mounting groove and the piezoelectric ceramics
The shape of piece 3 is adapted, and the other end end edge of the supporting element 21 is equipped with several solder joint slots, consequently facilitating by institute
It states piezoelectric ceramic piece 3 to be fixed on the supporting element 21, and then is convenient for when assembling the ultrasonic sensor, described fixed group
Part 2 and the piezoelectric ceramic piece 3 are fit directly into the cavity.
Fig. 3 and Fig. 4 a~4d is please referred to, introduces the second embodiment party of the ultrasonic sensor of the utility model in detail below
Formula.
In the present embodiment, the supporting element 21 includes the first support portion 213 and the second support portion 214 being oppositely arranged；
One end of first support portion 213 is fixed on the fixing piece 22 towards on the end surface of the piezoelectric ceramic piece 3, described
The other end of first support portion 213 is resisted against on the top of the piezoelectric ceramic piece 3, and one end of second support portion 214 is solid
The fixing piece 22 is scheduled on towards on the end surface of the piezoelectric ceramic piece 3, the other end of second support portion 214 against
On the top surface of the piezoelectric ceramic piece 3, the bottom of the piezoelectric ceramic piece 3 is resisted against the cavity of the shell 1
Bottom on.First support portion 213 and second support portion 214 have supporting role to the piezoelectric ceramics, can be with
The section of first support portion 213 and second support portion 214 that understand is arc-shaped, first support portion 213
Other end end edge is equipped with several solder joint slots, consequently facilitating the piezoelectric ceramic piece 3 is fixed on the supporting element 21
On, and then convenient for the ultrasonic sensor in assembly, the fixation kit 2 and the piezoelectric ceramic piece 3 are fit directly into
In 1 cavity of shell.
Further, the supporting element 21 further includes third support portion 215 and the 4th support portion (not shown), the third
Support portion 215 and the 4th support portion are formed to the central concave of the groove 23, to be formed for conducting wire to be fixed on
Bond pad locations on the top surface of the piezoelectric ceramic piece 3；One end of the third support portion 215 is fixed on the fixing piece
22 towards on the end surface of the piezoelectric ceramic piece 3, and the other end of the third support portion 215 is resisted against the piezoelectric ceramics
On the top surface of piece 3, one end of the 4th support portion is fixed on the fixing piece 22 towards the one of the piezoelectric ceramic piece 3
On end surfaces, the other end of the 4th support portion is resisted against on the top surface of the piezoelectric ceramic piece 3；First support
The side in portion 213 is connect by the third support portion 215 with the side of second support portion 214, first support portion
213 other side is connect by the 4th support portion with the other side of second support portion 214.The third support portion
215 and the 4th support portion be the piezoelectric ceramic piece 3 provide bond pad locations, in order to the electric wire of the control circuit board
It is welded on the top surface of the piezoelectric ceramic piece 3, to realize the normal function of the piezoelectric ceramic piece 3.
In the utility model embodiment, it should be noted that first support portion 213, second support portion
214, the third support portion 215, the section of the 4th support portion are arc-shaped.
Further, the central axis of the piezoelectric ceramic piece 3 is overlapped with the central axis of the supporting element 21, and institute
It is homogeneous to state the first support portion 213, second support portion 214, the third support portion 215, the height of the 4th support portion
Together, so that the fixation kit 2 and the piezoelectric ceramic piece 3 after assembling, guarantee that 3 plane of piezoelectric ceramic piece maintains an equal level, connects
Touching, and pass through the intermediate position that the piezoelectric ceramic piece 3 is isolated in the groove 23.
It should be understood that the groove 23 is located at the top of the piezoelectric ceramic piece 3, to effectively reduce described solid
The contact range for determining part 22 Yu the piezoelectric ceramic piece 3, thereby reduces the binding force of piezoelectric ceramic piece 3, greatly improves described
The sensitivity of ultrasonic sensor.
Fig. 5 and Fig. 6 a~6d is please referred to, introduces the third embodiment party of the ultrasonic sensor of the utility model in detail below
Formula.
In the present embodiment, the equal edge of the other end of the other end of first support portion 213 and second support portion 214
The side wall of the piezoelectric ceramic piece 3 extends and is formed the second mounting groove, and the outer side wall surface of the piezoelectric ceramic piece 3 is resisted against institute
In the interior side-wall surface for stating the second mounting groove；The area of section of second mounting groove is greater than the area of section of the groove 23,
It is formed with second step portion 212 before second mounting groove and the groove 23, the top of the piezoelectric ceramic piece 3 is resisted against
In the second step portion 212, the bottom of the piezoelectric ceramic piece 3 is resisted against on the bottom in 1 cavity of shell.
Compared to second embodiment, the other end of first support portion 213 of present embodiment and second described
The other end of support part 214 extends along the side wall of the piezoelectric ceramic piece 3 and is formed the second mounting groove, can be by the piezoelectric ceramics
In the accommodating of 3 part of piece and second mounting groove, so that the piezoelectric ceramic piece 3 is fixed on the second step portion 212 and institute
It states between the bottom of the cavity of shell 1.The groove 23 is located at the top of the piezoelectric ceramic piece 3, to effectively subtract
The contact range for having lacked the fixing piece 22 and the piezoelectric ceramic piece 3, thereby reduces 3 binding force of piezoelectric ceramic piece, significantly
Improve the sensitivity of the ultrasonic sensor.
Further, the other end of the other end end edge of first support portion 213 and second support portion 214
End edge is equipped with several solder joint slots.The third support portion 215 and the 4th support portion are the piezoelectric ceramic piece 3
Provide bond pad locations, in order to the control circuit board wire welding on the surface of the piezoelectric ceramic piece 3, thus real
The normal function of the existing piezoelectric ceramic piece 3.
To sum up, the utility model provides a kind of ultrasonic sensor, including shell 1, fixation kit 2 and piezoelectric ceramic piece
3；The shell 1 it is open at one end, and the shell 1 in be equipped with cavity, the piezoelectric ceramic piece 3 be set to the cavity bottom
On；The fixation kit 2 includes fixing piece 22 and supporting element 21, and the fixing piece 22 is mounted on the open end of the shell 1,
One end of the supporting element 21 is connected to the fixing piece 22 towards on the end surface of the piezoelectric ceramic piece 3, the support
The other end of part 21 is resisted against on the piezoelectric ceramic piece 3；Fluted 23 are opened up in the supporting element 21, the groove 23 is located at
Between the fixing piece 22 and the piezoelectric ceramic piece 3.
Middle ultrasonic sensor is due to being added to patch glue, encapsulating glue, acoustical cotton compared with the prior art in shell 1
So that complex process and influencing the vibration of piezoelectric ceramic piece 3, sensitivity is caused to decline, the utility model has following beneficial to effect
Fruit:
(1) piezoelectric ceramic piece 3 is fixed on the bottom in 1 cavity of shell by the supporting element 21, nothing
Patch glue and encapsulating glue need to be used, so as to avoid piezoelectric ceramic piece 3 since patch glue overflows and is bonded in piezoelectricity pottery
On 3 surface of tile, lead to the vibration for fettering piezoelectric ceramics；
(2) sealed connection mode is used, the fixing piece 22 is mounted on the open end of the shell 1, it can be complete
Be isolated encapsulating and/or the infiltration of patch glue, and by the piezoelectric ceramic piece 3 vibrate most enliven position and external environment every
From so that the top of the piezoelectric ceramic piece 3 is unfettered, to realize free vibration, and then the raising ultrasonic wave is passed
The sensitivity of sensor；
(3) supporting element 21 supports the piezoelectric ceramic piece 3, and the shell 1 has defencive function, thus favorably
In the compression strength for promoting ultrasonic sensor；
(4) simultaneously, fluted 23 are opened up in the supporting element 21, the groove 23 is located at the fixing piece 22 and the pressure
Between electroceramics piece 3, the groove 23 can reduce the contact range of the supporting element 21 and the piezoelectric ceramic piece 3, thus
The binding force of the piezoelectric ceramic piece 3 is reduced, and then improves the sensitivity of the ultrasonic sensor；
(5) it in addition, without using the acoustical cotton of softening in the cavity, to effectively simplify technique, and then drops
Low cost of manufacture；
It (6), need to be in the upper of piezoelectric ceramic piece 3 after piezoelectric ceramic piece 3 is attached on protective shell due in the prior art
Square slot milling, to eliminate the excessive constraint to sheet metal by air insulated, but since the top of piezoelectric ceramic piece 3 is without support
Part 21 causes the anti-pressure ability of product to be determined completely by the bonding force of the intensity of shell 1 and patch glue, is unfavorable for ultrasound in this way
The resistance to compression reliability assessment of wave sensor product and promotion.Ultrasonic sensor provided by the utility model passes through described fixed group
Part 2 has not only fully ensured that the free vibration of the piezoelectric ceramic piece 3, has promoted product sensitivity, but also considerably increases resistance to compression
Intensity；
In this way, ultrasonic sensor provided by the utility model has prevented the influence because of Heraeus hypervolia, simultaneously
It avoids above the piezoelectric ceramic piece 3 using flexible glue substance, the fixation kit 2 of the top of the piezoelectric ceramic piece 3
With effect is fixed and supported, to be effectively protected close between the piezoelectric ceramic piece 3 and the bottom of the cavity
Property, the utility model effectively can simplify technique and realize the free vibration of piezoelectric ceramic piece 3, to improve supersonic sensing
Device sensitivity.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (10)
1. a kind of ultrasonic sensor, which is characterized in that including shell, fixation kit and piezoelectric ceramic piece, the one of the shell
End opening, and cavity is equipped in the shell, the piezoelectric ceramic piece is set on the bottom of the cavity；The fixation kit packet
Fixing piece and supporting element are included, the fixing piece is mounted on the open end of the shell, and one end of the supporting element is connected to institute
Fixing piece is stated towards on the end surface of the piezoelectric ceramic piece, the other end of the supporting element is resisted against the piezoelectric ceramic piece
On；Open up fluted in the supporting element, the groove is between the fixing piece and the piezoelectric ceramic piece.
2. ultrasonic sensor as described in claim 1, which is characterized in that the ultrasonic sensor further includes control circuit
Plate and signal wire, the fixing piece is interior to be equipped with placed cavity and signal line passage, and the signal line passage is connected to the placed cavity；
The control circuit board is set in the placed cavity, and the signal wire is set in the signal line passage, the control electricity
One end of road plate is electrically connected with the signal wire, and the other end of the control circuit board passes through conducting wire and piezoelectric ceramic piece electricity
Connection.
3. ultrasonic sensor as claimed in claim 1 or 2, which is characterized in that the other end of the supporting element is along the pressure
The side wall of electroceramics piece extends and is formed the first mounting groove, and the outer side wall surface of the piezoelectric ceramic piece is resisted against first peace
In the interior side-wall surface of tankage；
The area of section of first mounting groove is greater than the area of section of the groove, and first mounting groove and the groove
It is formed with first step portion before, is resisted against at the top of the piezoelectric ceramic piece in the first step portion, the piezoelectric ceramics
The bottom of piece is resisted against on the bottom of the cavity.
4. ultrasonic sensor as claimed in claim 3, which is characterized in that the cross section of the supporting element, described
The shape of one mounting groove is adapted with the shape of the piezoelectric ceramic piece, and the other end end edge of the supporting element is equipped with
Several solder joint slots.
5. ultrasonic sensor as claimed in claim 1 or 2, which is characterized in that the supporting element includes be oppositely arranged
One support portion and the second support portion；
One end of first support portion is fixed on the fixing piece towards on the end surface of the piezoelectric ceramic piece, and described
The other end of one support portion is resisted against on the top surface of the piezoelectric ceramic piece, and one end of second support portion is fixed on institute
Fixing piece is stated towards on the end surface of the piezoelectric ceramic piece, the other end of second support portion is resisted against the piezoelectricity pottery
On the top surface of tile, the bottom of the piezoelectric ceramic piece is resisted against on the bottom of the cavity.
6. ultrasonic sensor as claimed in claim 5, which is characterized in that the supporting element further includes third support portion and
Four support portions, the third support portion and the 4th support portion are formed to the central concave of the groove, are used for being formed
Bond pad locations conducting wire being fixed on the top surface of the piezoelectric ceramic piece；
One end of the third support portion is fixed on the fixing piece towards on the end surface of the piezoelectric ceramic piece, and described
The other end of three support portions is resisted against on the top surface of the piezoelectric ceramic piece, and one end of the 4th support portion is fixed on institute
Fixing piece is stated towards on the end surface of the piezoelectric ceramic piece, the other end of the 4th support portion is resisted against the piezoelectricity pottery
On the top surface of tile；
The side of first support portion is connect by the third support portion with the side of second support portion, and described first
The other side of support portion is connect by the 4th support portion with the other side of second support portion.
7. ultrasonic sensor as claimed in claim 6, which is characterized in that first support portion, second support portion,
The third support portion, the section of the 4th support portion are arc-shaped.
8. ultrasonic sensor as claimed in claim 6, which is characterized in that the central axis of the piezoelectric ceramic piece with it is described
The central axis of supporting element is overlapped, and first support portion, second support portion, the third support portion, the described 4th
The height of support portion is all the same.
9. such as the described in any item ultrasonic sensors of claim 6~8, which is characterized in that first support portion it is another
The other end of end and second support portion extends along the side wall of the piezoelectric ceramic piece and is formed the second mounting groove, the pressure
The outer side wall surface of electroceramics piece is resisted against in the interior side-wall surface of second mounting groove；
The area of section of second mounting groove is greater than the area of section of the groove, and second mounting groove and the groove
It is formed with second step portion before, is resisted against at the top of the piezoelectric ceramic piece in the second step portion, the piezoelectric ceramics
The bottom of piece is resisted against on the bottom of the cavity.
10. ultrasonic sensor as claimed in claim 9, which is characterized in that the other end end edge of first support portion
The other end end edge of edge and second support portion is equipped with several solder joint slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820339400.9U CN208275714U (en) | 2018-03-12 | 2018-03-12 | A kind of ultrasonic sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820339400.9U CN208275714U (en) | 2018-03-12 | 2018-03-12 | A kind of ultrasonic sensor |
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| CN208275714U true CN208275714U (en) | 2018-12-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117664203A (en) * | 2024-01-31 | 2024-03-08 | 成都楷模电子科技有限公司 | Novel high-frequency ultrasonic sensor |
| CN117664203B (en) * | 2024-01-31 | 2024-04-26 | 成都楷模电子科技有限公司 | High-frequency ultrasonic sensor |
-
2018
- 2018-03-12 CN CN201820339400.9U patent/CN208275714U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117664203A (en) * | 2024-01-31 | 2024-03-08 | 成都楷模电子科技有限公司 | Novel high-frequency ultrasonic sensor |
| CN117664203B (en) * | 2024-01-31 | 2024-04-26 | 成都楷模电子科技有限公司 | High-frequency ultrasonic sensor |
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