CN206906416U - Electric charge output element and the shearing piezoelectric acceleration sensor of annular - Google Patents
Electric charge output element and the shearing piezoelectric acceleration sensor of annular Download PDFInfo
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- CN206906416U CN206906416U CN201720655100.7U CN201720655100U CN206906416U CN 206906416 U CN206906416 U CN 206906416U CN 201720655100 U CN201720655100 U CN 201720655100U CN 206906416 U CN206906416 U CN 206906416U
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- support
- connection member
- piezoelectric element
- electric charge
- annular
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Abstract
It the utility model is related to a kind of electric charge output element and the shearing piezoelectric acceleration sensor of annular, including base, including support member and the connection member that is arranged in the support member, mounting hole be provided with the connection member；Support, it is set in the connection member and gap setting is left between the connection member, the support is connected with the support member；Piezoelectric element, socket is on the bracket；Mass, it is socketed on the piezoelectric element and is vacantly set above the support member.Electric charge output element provided by the utility model and the shearing piezoelectric acceleration sensor of annular, influence of the connector to piezoelectric element can be avoided, ensure the frequency response of the shearing piezoelectric acceleration sensor of annular and the stability of cross sensitivity, and then ensure the accuracy of testing result.
Description
Technical field
Piezoelectric acceleration sensor technical field is the utility model is related to, more particularly to a kind of electric charge output element and ring
The shearing piezoelectric acceleration sensor of shape.
Background technology
Piezoelectric acceleration sensor is also known as piezoelectric accelerometer, falls within inertial sensor.Piezoelectric acceleration sensor
Principle be piezo-electric effect using piezoelectric element, when accelerometer is vibrated, mass add power on the piezoelectric element also with
Change.When tested vibration frequency is far below the intrinsic frequency of accelerometer, then the change of power is directly proportional to by measuring acceleration.
The structure type of piezoelectric acceleration sensor mainly have center installation compression, upside-down mounting center coordinate compression and
Annular is shearing, and the shearing piezoelectric acceleration sensor of annular is simple in construction, can make minimal type, the acceleration of high resonant frequency
Meter, application are relatively broad.
The shearing piezoelectric acceleration sensor of annular of the prior art is to produce telecommunications using piezoelectric element detrusion
It is number directly proportional to acceleration magnitude.The shearing piezoelectric acceleration sensor of annular mainly by electric charge output element and circuit board group into,
Electric charge output element includes base, piezoelectric element and mass.The shearing piezoelectric acceleration sensor of annular when in use, electric charge
Need to load connector in output element, the loading of connector can make base produce strain and transmit stress to piezoelectric element, lead
Cause the shearing piezoelectric acceleration sensor of annular when in use, frequency response and cross sensitivity are unstable, influence testing result.
Utility model content
The utility model embodiment provides a kind of electric charge output element and the shearing piezoelectric acceleration sensor of annular, can
Influence of the connector to piezoelectric element is avoided, ensures frequency response and the cross sensitivity of the shearing piezoelectric acceleration sensor of annular
Stability, and then ensure testing result accuracy.
On the one hand the utility model embodiment proposes a kind of electric charge output element, including base, including support member and
The connection member being arranged in the support member, mounting hole is provided with connection member；Support, be set in connection member and
Gap setting is left between connection member, support is connected with support member；Piezoelectric element, it is socketed on support；Mass, set
Connect on the piezoelectric element and side is vacantly set on the supporting member.
According to the one side of the utility model embodiment, support is the annular structural part set around connection member, is wrapped
Relative inner ring surface and outer ring surface are included, gap setting is left between inner ring surface and connection member, piezoelectric element is socketed in support
On outer ring surface.
According to the one side of the utility model embodiment, the outer ring surface of support is circumferentially provided with support lugn along it, branch
Height is resisted against on support lugn higher than height, piezoelectric element where support member where supportting flange.
According to the one side of the utility model embodiment, the one of which of support member and support is provided with locating slot,
Support member and the wherein another one of support are provided with locating piece, locating piece and locating slot when support is connected to support member that
This coordinates, so that support is coaxial with connection member.
According to the one side of the utility model embodiment, connection member has a column structure, and mounting hole is along connecting portion
The axis direction of part is set and through connection part, and support member is the disk class formation set around connection member and is located at connection
One end of part.
According to the one side of the utility model embodiment, piezoelectric element is the ring being made up of piezoelectric ceramics or quartz crystal
Shape structure, including relative inner ring surface and outer ring surface, conductive layer, mass are coated with the inner ring surface and outer ring surface of piezoelectric element
It is socketed on the outer ring surface of piezoelectric element.
On the other hand the utility model embodiment proposes a kind of shearing piezoelectric acceleration sensor of annular, including：On
State electric charge output element；Circuit board, circuit board are set with piezoelectric element and mass by preset distance, piezoelectric element and circuit board
Electrical connection.
According to the other side of the utility model embodiment, the shearing piezoelectric acceleration sensor of annular also includes shell
Body, housing are set around electric charge output element, dividing plate are provided with housing and/or in connection member, circuit board is around connecting portion
Part sets and is supported on dividing plate, and circuit board is printed circuit board or thick film circuit board.
According to the other side of the utility model embodiment, dividing plate is all to be continuously disposed in housing and/or connection member
Upward annular slab, or, dividing plate includes the arc that two or more is disposed in housing and/or connection member circumference.
According to the other side of the utility model embodiment, the shearing piezoelectric acceleration sensor of annular also includes connection
Device, connector is arranged on housing and and circuit board electrical connection.
The electric charge output element and the shearing piezoelectric acceleration sensor of annular provided according to the utility model embodiment, its
Including base, support, piezoelectric element and mass.In use, connector is assemblied in the mounting hole in the connection member of base,
Because piezoelectric element is socketed on support, and support is set in the connection member of base and between being left between connection member
Gap, therefore, even if making base produce strain when connector loads in mounting hole, stress will not be also transferred in piezoelectric element,
Influence of the connector to piezoelectric element can be avoided, ensures the frequency response and laterally spirit of the shearing piezoelectric acceleration sensor of annular
The stability of sensitivity, and then ensure the accuracy of testing result.
Brief description of the drawings
The feature of the utility model exemplary embodiment, advantage and technique effect described below with reference to the accompanying drawings.
Fig. 1 is the dimensional structure diagram of the electric charge output element of the utility model embodiment；
Fig. 2 is the cross-sectional view of the electric charge output element of the utility model embodiment；
Fig. 3 is the structural representation of the base of the utility model embodiment；
Fig. 4 is the structural representation of the support of the utility model embodiment；
Fig. 5 is the structural representation of the piezoelectric element of the utility model embodiment；
Fig. 6 is the structural representation of the mass of the utility model embodiment；
Fig. 7 is the dimensional structure diagram of the annular shearing piezoelectric acceleration sensor of the utility model embodiment；
Fig. 8 is the cross-sectional view of the annular shearing piezoelectric acceleration sensor of the utility model embodiment.
In figure：
1- electric charge output elements；
10- bases；11- support members；12- connection members；13- mounting holes；14- locating slots；
20- supports；21- inner ring surfaces；22- outer ring surfaces；23- support lugns；24- locating pieces；
30- piezoelectric elements；31- inner ring surfaces；32- outer ring surfaces；
40- masses；41- inner ring surfaces；42- outer ring surfaces；
2- circuit boards；
3- housings；
4- dividing plates；
5- connectors；
6- closures.
Embodiment
The feature and exemplary embodiment of various aspects of the present utility model is described more fully below.Retouched in detail in following
In stating, it is proposed that many details, to provide to comprehensive understanding of the present utility model.But for people in the art
It will be apparent that the utility model can be implemented in the case of some details in not needing these details for member.
Description to embodiment below is used for the purpose of providing to of the present utility model more preferable by showing example of the present utility model
Understanding.In the the accompanying drawings and the following description, at least part of known features and technology are not illustrated, to avoid to this reality
Unnecessary obscure is caused with new；Also, in order to clear, it may be exaggerated the size of part-structure.In addition, hereinafter retouched
Feature, structure or the characteristic stated can be incorporated in one or more embodiments in any suitable manner.
The noun of locality of middle appearance described below is the direction shown in figure, is not that electric charge of the present utility model is exported
The concrete structure of element is defined.In description of the present utility model, it is also necessary to explanation, unless otherwise clear and definite regulation
And restriction, term " installation ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected；
Can be joined directly together, can also be indirectly connected.For the ordinary skill in the art, on visual concrete condition understands
State concrete meaning of the term in the utility model.
It is defeated according to the electric charge of the utility model embodiment with reference to Fig. 1 to Fig. 6 in order to more fully understand the utility model
Go out element to be described in detail.
As Figure 1-Figure 4, the utility model embodiment proposes a kind of electric charge output element 1, including base 10, support
20th, piezoelectric element 30 and mass 40, base 10 include support member 11 and the connection member 12 being arranged in support member 11,
Mounting hole 13 is provided with connection member 12, support 20 is set in connection member 12 and leaves gap between connection member 12
Set, support 20 is connected with support member 11, and piezoelectric element 30 is socketed on support 20, and mass 40 is socketed in piezoelectric element 30
The upper and hanging setting above support member 11.
Specifically, as shown in figure 3, connection member 12 has a column structure in the present embodiment, mounting hole 13 is along connecting portion
The axis direction of part 12 is set and through connection part 12, support member 11 be the disk class formation that is set around connection member 12 and
Positioned at one end of connection member 12, i.e. mounting hole 13 also penetrates support member 11 simultaneously.
As shown in Figure 2, Figure 4 shows, support 20 is the annular structural part set around connection member 12, by titanium alloy material system
Into including relative inner ring surface 21 and outer ring surface 22, in the present embodiment, support 20 is the ring continuously set around connection member 12
Shape structural member, the internal face of the as annular structural part of inner ring surface 21, the outside wall surface of the as annular structural part of outer ring surface 22, inner ring surface
21 shape of cross section and the shape of cross section of the outside wall surface of connection member 12 are circle, and the cross-sectional diameter of inner ring surface 21 is big
In the cross-sectional diameter of the outside wall surface of connection member 12, during so that support 20 is set in connection member 12, the inner ring of support 20
Gap is left between the outside wall surface of face 21 and connection member 12.
As shown in Fig. 2, Fig. 5, piezoelectric element 30 is loop configuration body and is made up of piezoelectric ceramics, including relative inner ring surface
31 and outer ring surface 32, conductive layer is coated with the inner ring surface 31 and outer ring surface 32 of piezoelectric element 30, and conductive layer is gold or other energy
The material of electric action is enough played, the inner ring surface 31 of piezoelectric element 30 is socketed on the outer ring surface 22 of support 20.
As shown in Fig. 2, Fig. 6, mass 40 is made by loop configuration body and using tungsten alloy material, including relative inner ring
Face 41 and outer ring surface 42, the inner ring surface 41 of mass 40 are socketed on the outer ring surface 32 of piezoelectric element 30.
Described set is connected in a part and is set on another part and is connected with another part, i.e. the present embodiment
In, piezoelectric element 30 is set on support 20 and is connected with support 20, and mass 40 is set on piezoelectric element 30 and and piezoelectricity
Element 30 connects.In order to ensure the rigidity and stability of the structure of electric charge output element 1, in the present embodiment, piezoelectric element 30 passes through
Viscose glue is adhesively fixed with support 20, and mass 40 is adhesively fixed by viscose glue and piezoelectric element 30.For the ease of to piezoelectric element
30 positioning and bonding, support lugn 23, height where support lugn 23 are circumferentially provided with along it in the outer ring surface 22 of support 20
It is resisted against higher than height, piezoelectric element 30 where support member 11 on support lugn 23.
Thus, when in use, connector is assembled in connecting portion for the electric charge output element 1 that the utility model embodiment provides
In mounting hole 13 on part 12, because piezoelectric element 30 is socketed on support 20, and support 20 is set in connection member 12 and
Leave gap between connection member 12, though when connector load mounting hole 13 in make base 10 produce strain, also will not will
Stress is transferred in piezoelectric element 30, can avoid influence of the connector to piezoelectric element 30, ensures that the shearing piezoelectricity of annular adds
The frequency response of fast sensor and the stability of cross sensitivity, and then ensure the accuracy of testing result.
It is understood that support 20 is not limited to surround the annular structural part that connection member 12 is continuously set, one
In a little optional embodiments, support 20 can also be the arc monomer structure for being interrupted setting around connection member 12 by two or more
The annular structural part surrounded, now, the internal face of the as two or more arc monomer of inner ring surface 21 of support 20 surround jointly, prop up
The outer ring surface 22 of frame 20 is that the outside wall surface of two or more arc monomer surrounds jointly, and support 20 uses said structure, also can
Ensure the requirement of electric charge output element 1；It is optional at some meanwhile piezoelectric element 30 is not limited to be made up of piezoelectric ceramics
Embodiment in, monocrystalline can also be used, as quartz crystal is made.
As an alternative embodiment, as shown in figs 2-4, locating slot 14 is provided with support member 11, it is fixed
Position groove 14 is the annular groove set around the outside wall surface of connection member 12, and locating piece 24, locating piece 24 are provided with support 20
Positioned at support 20 close to one end of support member 11, locating piece 24 is the disk class formation set around support 20, locating piece 24 with
The shape of locating slot 14 matches, when support 20 is set in connection member 12 and is connected with support member 11, locating piece
24 grafting enter in locating slot 14 to be fitted to each other with locating slot 14, and now, the side wall of locating piece 24 is close to the side of locating slot 14
Wall, both are fixedly connected, and support 20 is positioned, and make it coaxial with connection member 12, ensure that support 20 is set in connecting portion
When on part 12, the outside wall surface of the inner ring surface 21 of support 20 not with connection member 12 contacts, and is further ensured that built-in in mounting hole 13
During connector, when such as filling bolt, piezoelectric element 30 will not be had an impact.For the ease of processing, support 20, support lugn 23 and
Locating piece 24 is integral type structure.
It is understood that the positioning for support 20 is not limited to above-mentioned form, in some optional embodiments, also
Locating piece can be set in support member 11, locating slot is provided with support 20, when support 20 is set in connection member 12
When being connected above and with support member 11, the shape of the locating slot on support 20 and the locating piece in support member 11 matches simultaneously
It is fixedly connected, also disclosure satisfy that the positioning requirements to support 20, make support 20 and connection member 12 coaxial, ensures the interior of support 20
Outside wall surface of the anchor ring 21 not with connection member 12 contacts.
The electric charge output element 1 that the utility model embodiment provides, when in use, connector is assembled in connection member 12
On mounting hole 13 in, because piezoelectric element 30 is socketed on support 20, and support 20 is set in the connection member 12 of base 10
Above and gap is left between connection member 12, even if making base 10 produce strain when connector loads in mounting hole 13, due to
The presence in the gap between support 20 and connection member 12, stress will not be transferred in piezoelectric element 30, can avoid connecting
Influence of the part to piezoelectric element 30；The support lugn 23 of relative set on support 20, be easy to positioning to piezoelectric element 30 and
Bonding, and enable to mass 40 to be in vacant state above support member 11；Meanwhile in support 20 and support member 11
On the locating piece 24 that can be mutually matched and locating slot 14 that are correspondingly arranged, can ensure that support 20 is coaxially set with connection member 12
Put, being further ensured that between support 20 and connection member 12 needs to leave the requirement in gap.
As shown in Figure 7, Figure 8, the utility model embodiment additionally provides a kind of shearing piezoelectric acceleration sensor of annular,
Electric charge output element 1 and circuit board 2 including any of the above-described embodiment, exported in the peripheral ring of electric charge output element 1 around electric charge
Element 1 is additionally provided with housing 3, is provided with breach, the branch of breach and base 10 along in its circumference in the lower section of the inwall of housing 3
Support part part 11 is engaged by clamping, and the top clamping of housing 3 is provided with closure 6, the middle part of closure 6 is provided with for connection member
12 through holes passed through, the top surface of connection member 12 and the either flush of closure 6.Electric charge output element 1 and circuit board 2 are respectively positioned on
In housing 3, connector 5 is additionally provided with housing 3, piezoelectric element 30 and connector 5 electrically connect with circuit board 2.In piezoelectricity
The top preset distance of element 30 and mass 40 is provided with dividing plate 4, and dividing plate 4 is the annular being continuously disposed in the circumference of housing 3
Plate, dividing plate 4 is horizontally disposed and is fixed on the internal face of housing 3, and circuit board 2 uses printed circuit board, and circuit board 2 is around connection
Part 12 sets and is supported on dividing plate 4, so that circuit board 2 is set with piezoelectric element 30 and mass 40 by preset distance, with
Piezoelectric element 30 and mass 40 do not contact, avoid making mass 40, piezoelectric element 30 because the weight of circuit board 2 is uneven
Into influence, and then ensure the frequency response of the shearing piezoelectric acceleration sensor of annular and the stability of cross sensitivity.
It is understood that dividing plate 4 is not limited to the annular slab to be continuously disposed in the circumference of housing 3, and it is horizontally disposed
And it is fixed on the internal face of housing 3.In some optional embodiments, dividing plate 4 can also be to be continuously disposed in connection member
Annular slab in 12 circumferences, dividing plate 4 is horizontally disposed and is fixed in the outside wall surface of connection member 12.
Simultaneously, however it is not limited to dividing plate 4 only is set in the outside wall surface of connection member 12 on the internal face of housing 3 or only,
Have in some embodiments, dividing plate 4 can be set in the internal face of housing 3 and the outside wall surface of connection member 12 simultaneously, positioned at housing 3
Dividing plate 4 on internal face and the dividing plate 4 in the outside wall surface of connection member 12 are in the same plane, with preferably completion pair
The support of circuit board 2.
Also, the structure of dividing plate 4 is not only limited to the annular being continuously disposed in housing 3 and/or the circumference of connection member 12
Plate, in some optional embodiments, dividing plate 4 can also be the arc that two or more interval is located in the circumference of housing 3, preferably
Two or more arc is uniformly distributed on the internal face of housing 3, to play the supporting role to circuit board 2；Or dividing plate 4
The arc in the circumference of connection member 12 is located at for two or more interval, preferably two or more arc is in the outer of connection member 12
It is uniformly distributed on wall；Or can also be provided with the internal face of housing 3 and in the outside wall surface of connection member 12 two with
Upper spaced apart arc, the arc on the internal face of housing 3 and the arc in the outside wall surface of connection member 12
Shape plate is at grade.Dividing plate 4 disclosure satisfy that the branch to circuit board 2 using the structure and installation form of the various embodiments described above
Support acts on, and it is not contacted with piezoelectric element 30 and mass 40, avoids because the weight of circuit board 2 is uneven to piezoelectric element
30th, mass 40 impacts.
It is understood that circuit board 2 is not limited to use printed circuit board, in some optional embodiments, circuit
Plate 2 can also use thick film circuit board, small volume and light quality.Meanwhile circuit board 2 is not limited to surround connection member 12 and set
Put and be supported on dividing plate 4.Have in some embodiments, when space is sufficiently large, circuit board 2 can be set at an arbitrary position, only
Ensure that it is set with mass 40 and piezoelectric element 30 by preset distance, do not contacted i.e. with mass 40 and piezoelectric element 30
Can.
The shearing piezoelectric acceleration sensor of one kind annular that the utility model embodiment provides, including any of the above-described implementation
The electric charge output element 1 of example, there is the advantages of electric charge output element 1 is identical, therefore identical part be not repeated here；Meanwhile
The shearing piezoelectric acceleration sensor of annular also includes circuit board 2, and piezoelectric element 30 electrically connects with circuit board 2, and circuit board 2 can
Caused extremely faint electric charge (or voltage) after the stress of piezoelectric element 30 is amplified, to meet requirement.Electricity simultaneously
Road plate 2 is set with mass 40, piezoelectric element 30 according to preset distance, it is not connect with piezoelectric element 30 and mass 40
Touch, avoid impacting mass 40, piezoelectric element 30 because the weight of circuit board 2 is uneven, and then ensure that annular is shearing
The frequency response of piezoelectric acceleration sensor and the stability of cross sensitivity.
Although the utility model is described by reference to preferred embodiment, model of the present utility model is not being departed from
In the case of enclosing, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as not depositing
The every technical characteristic being previously mentioned in structural hazard, each embodiment can combine in any way.The utility model
It is not limited to specific embodiment disclosed herein, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
- A kind of 1. electric charge output element, it is characterised in that：IncludingBase, including support member and the connection member that is arranged in the support member, peace is provided with the connection member Fill hole；Support, it is set in the connection member and gap setting is left between the connection member, the support and the branch Support part part connection；Piezoelectric element, socket is on the bracket；Mass, it is socketed on the piezoelectric element and is vacantly set above the support member.
- 2. electric charge output element according to claim 1, it is characterised in that：The support is to be set around the connection member The annular structural part put, including relative inner ring surface and outer ring surface, gap is left between the inner ring surface and the connection member Set, the piezoelectric element is socketed on the outer ring surface of the support.
- 3. electric charge output element according to claim 2, it is characterised in that：The outer ring surface of the support is circumferentially disposed along its There is support lugn, height is resisted against institute higher than height, the piezoelectric element where the support member where the support lugn State on support lugn.
- 4. the electric charge output element according to claims 1 to 3 any one, it is characterised in that：The support member and institute The one of which for stating support is provided with locating slot, and the wherein another one of the support member and the support is provided with locating piece, The locating piece is fitted to each other with the locating slot when the support is connected to the support member, so that the support and institute It is coaxial to state connection member.
- 5. electric charge output element according to claim 1, it is characterised in that：The connection member has column structure, institute State axis direction of the mounting hole along the connection member to set and penetrate the connection member, the support member is around institute State the disk class formation of connection member setting and positioned at one end of the connection member.
- 6. electric charge output element according to claim 1, it is characterised in that：The piezoelectric element is by piezoelectric ceramics or stone The loop configuration body that English crystal is formed, including relative inner ring surface and outer ring surface, the inner ring surface and outer ring surface of the piezoelectric element On be coated with conductive layer, the mass is socketed on the outer ring surface of the piezoelectric element.
- A kind of 7. shearing piezoelectric acceleration sensor of annular, it is characterised in that：IncludingElectric charge output element described in claim 1 to 6 any one；Circuit board, the circuit board and the piezoelectric element and the mass are set by preset distance, the piezoelectric element and The circuit board electrical connection.
- 8. the shearing piezoelectric acceleration sensor of annular according to claim 7, it is characterised in that：Also include housing, institute State housing to set around the electric charge output element, dividing plate, the electricity are provided with the housing and/or in the connection member Road plate sets and is supported on the dividing plate around the connection member, and the circuit board is printed circuit board or thick film circuit Plate.
- 9. the shearing piezoelectric acceleration sensor of annular according to claim 8, it is characterised in that：The dividing plate is continuous The annular slab being arranged in the housing and/or the connection member circumference, or, the dividing plate is set including two or more interval Put the arc on the housing and/or the connection member circumference.
- 10. the shearing piezoelectric acceleration sensor of annular according to claim 8, it is characterised in that：Also include connector, The connector set on the housing and with the circuit board electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655100.7U CN206906416U (en) | 2017-06-07 | 2017-06-07 | Electric charge output element and the shearing piezoelectric acceleration sensor of annular |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720655100.7U CN206906416U (en) | 2017-06-07 | 2017-06-07 | Electric charge output element and the shearing piezoelectric acceleration sensor of annular |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206906416U true CN206906416U (en) | 2018-01-19 |
Family
ID=61287212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720655100.7U Withdrawn - After Issue CN206906416U (en) | 2017-06-07 | 2017-06-07 | Electric charge output element and the shearing piezoelectric acceleration sensor of annular |
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| Country | Link |
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| CN (1) | CN206906416U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167631A (en) * | 2017-06-07 | 2017-09-15 | 西人马（厦门）科技有限公司 | Electric charge output element and annular shearing piezoelectric acceleration sensor |
-
2017
- 2017-06-07 CN CN201720655100.7U patent/CN206906416U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167631A (en) * | 2017-06-07 | 2017-09-15 | 西人马（厦门）科技有限公司 | Electric charge output element and annular shearing piezoelectric acceleration sensor |
| WO2018223852A1 (en) * | 2017-06-07 | 2018-12-13 | 西人马（厦门）科技有限公司 | Charge output element and annular shear-type piezoelectric acceleration sensor |
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Granted publication date: 20180119 Effective date of abandoning: 20190903 |