CN209544395U - Charge output element and piezoelectric acceleration sensor - Google Patents
Charge output element and piezoelectric acceleration sensor Download PDFInfo
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- CN209544395U CN209544395U CN201920375471.9U CN201920375471U CN209544395U CN 209544395 U CN209544395 U CN 209544395U CN 201920375471 U CN201920375471 U CN 201920375471U CN 209544395 U CN209544395 U CN 209544395U
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Abstract
The utility model discloses a kind of charge output element and piezoelectric acceleration sensors.The charge output element includes: pedestal, including the polygon connecting component with multiple sides；Piezoelectric element, at least two piezoelectric units including the circumferentially-spaced distribution along connecting component, at least two piezoelectric units are correspondingly connected with the setting of at least two sides in multiple sides of component, and piezoelectric unit includes at least one piezo-electric crystal, and each piezo-electric crystal is arranged in parallel；Quality block assembly is set to the peripheral side of piezoelectric element, and piezoelectric element is between connecting component and quality block assembly；Wherein, connecting component, piezoelectric element and quality block assembly are mutually interference fitted.Multiple piezo-electric crystals are arranged in the side of connecting component in charge output element disclosed by the utility model, and each piezo-electric crystal is arranged in parallel, and are capable of increasing the sensitivity of charge output element, then increase the sensitivity of piezoelectric acceleration sensor.
Description
Technical field
The utility model belongs to sensor technical field more particularly to a kind of charge output element and piezoelectric acceleration sensing
Device.
Background technique
Piezoelectric acceleration sensor is also known as piezoelectric accelerometer, is a kind of inertial sensor.Piezoelectric acceleration sensor
Principle be piezoelectric effect using piezoelectric element, when accelerometer is vibrated, the power of mass block on the piezoelectric element is also therewith
Variation.When tested vibration frequency is far below the intrinsic frequency of accelerometer, then the variation of power is directly proportional to by measuring acceleration.Mark
Quasi- piezoelectric acceleration sensor is for demarcating used in acceleration transducer, therefore, for standard piezoelectric acceleration transducer
The requirement of energy is more harsh, needs higher sensitivity, and the usual sensitivity of existing piezoelectric acceleration sensor is not high enough, no
It is able to satisfy the requirement of standard piezoelectric acceleration transducer.
Therefore a kind of charge output element with higher sensitivity is needed to meet standard piezoelectric acceleration transducer
It is required that.
Utility model content
The utility model embodiment provides a kind of charge output element and piezoelectric acceleration sensor, it is intended to can be improved
The sensitivity of charge output element.
In a first aspect, the utility model provides a kind of charge output element, comprising: pedestal, including with multiple sides
Polygon connecting component；Piezoelectric element, at least two piezoelectric units including the circumferentially-spaced distribution along connecting component, at least two
A piezoelectric unit is correspondingly connected with the setting of at least two sides in multiple sides of component, and piezoelectric unit includes at least one piezoelectricity
Crystal, each piezo-electric crystal are arranged in parallel；Quality block assembly, is set to the peripheral side of piezoelectric element, and piezoelectric element is located at interconnecting piece
Between part and quality block assembly；Wherein, connecting component, piezoelectric element and quality block assembly are mutually interference fitted.
One aspect according to the present utility model, piezo-electric crystal are bending laminated structure, bend laminated structure and interconnecting piece
The shape of the side of part matches.
One aspect according to the present utility model, piezo-electric crystal be straight laminated structure, the shape of straight laminated structure with
The shape of the side of connecting component matches, and each side of connecting component is correspondingly arranged on a piezoelectric unit.
One aspect according to the present utility model, the two of the normal direction of the circumferential surface along connecting component of each piezo-electric crystal
A opposite surface is provided with conductive film, and piezoelectric unit includes the more than two piezo crystals being stacked in normal direction
The polarity of body, close to each other two surface of adjacent two be stacked piezo-electric crystal is identical.
One aspect according to the present utility model further comprises: electrode slice, the piezo-electric crystal with each layer is in normal direction
Upper alternating is stacked, and for the number of plies of electrode slice one layer more than piezo-electric crystal, electrode slice includes sticking part and interconnecting piece, sticking part pair
Piezo-electric crystal is answered to be arranged, interconnecting piece is electrically connected with sticking part, and electrode slice is made to form the cyclic structure body circumferentially disconnected；Wherein,
The electrode slice of each odd-level is electrically connected by conducting line segment, and the electrode slice of each even level is electrically connected by conducting line segment, so that each piezoelectricity
Crystal is in parallel.
One aspect according to the present utility model, the size of sticking part are greater than or equal to the size of piezo-electric crystal, so that pressure
Transistor can be bonded with sticking part completely completely；And/or interconnecting piece is less than sticking part along the axial width of connecting component
Along axial width.
One aspect according to the present utility model, conducting line segment electrode slice open position circumferentially by the electricity of each odd-level
Pole piece electrical connection；And the electrode slice of each even level is circumferentially electrically connected by conducting line segment in the open position of electrode slice.
One aspect according to the present utility model, quality block assembly include circumferentially spaced multiple mass blocks, often
The peripheral side of a piezoelectric unit is correspondingly arranged at least one mass block.One aspect according to the present utility model is further wrapped
It includes:
Further comprise: pyrocondensation ring is sheathed on quality block assembly, and pyrocondensation ring and quality block assembly are interference fitted；Insulating trip,
It is sheathed on connecting component, between connecting component and piezoelectric unit.
Second aspect, the utility model provide a kind of piezoelectric acceleration sensor, comprising: charge output element is above-mentioned
The charge output element of any embodiment；Shell around charge output element, and is set on pedestal；Signal export structure, with
Piezoelectric element electrical connection.
In the utility model embodiment, connecting component has multiple sides, convenient on each surface of the side of connecting component
It is respectively provided with the piezoelectric unit including at least one piezo-electric crystal, the quantity and section of the piezo-electric crystal of connecting component side can be increased
Save space is arranged in parallel by each piezo-electric crystal, is capable of increasing the sensitivity of charge output element, is then increased piezoelectric acceleration
The sensitivity of sensor.Further, connecting component, piezoelectric element and quality block assembly are mutually interference fitted, connecting component, pressure
It is rigid contact between electrical component and quality block assembly, is not necessarily to adhesive layer, the rigidity of charge output element entirety can be increased,
Then the Frequency Response and resonance of piezoelectric acceleration sensor are able to ascend.
Detailed description of the invention
It, below will be in the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Required attached drawing is briefly described, it should be apparent that, drawings described below is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of overlooking structure diagram of charge output element of the utility model embodiment；
Fig. 2 is a kind of the schematic diagram of the section structure of charge output element of the utility model embodiment；
Fig. 3 is the overlooking structure diagram of another charge output element of the utility model embodiment；
Fig. 4 is a kind of structural schematic diagram of electrode slice connection of the utility model embodiment；
Fig. 5 is the odd-level of the utility model embodiment or the structural schematic diagram of even level electrode slice electrical connection；
Fig. 6 is a kind of assembly method flow chart of charge output element of the utility model embodiment；
Fig. 7 is a kind of the schematic diagram of the section structure of piezoelectric acceleration sensor of the utility model embodiment.
Specific embodiment
The feature and exemplary embodiment of the various aspects of the utility model is described more fully below.It is retouched in detail in following
In stating, many details are proposed, in order to provide the comprehensive understanding to the utility model.But for those skilled in the art
It will be apparent that the utility model can be implemented in the case where not needing some details in these details for member.
Below the description of embodiment is used for the purpose of providing by showing the example of the utility model to the more preferable of the utility model
Understanding.In the the accompanying drawings and the following description, at least part of known features and technology are not shown, to avoid to this reality
Unnecessary obscure is caused with novel；Also, for clarity, may be exaggerated the size of part-structure.In addition, hereinafter being retouched
Feature, the structure or characteristic stated can be incorporated in any suitable manner in one or more embodiments.
The noun of locality of middle appearance described below is direction shown in figure, is not to the embodiments of the present invention
Specific structure is defined.In the description of the present invention, it should also be noted that, unless otherwise specific regulation and limit
Fixed, term " installation ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be directly connected, can also be indirectly connected.For the ordinary skill in the art, visual specific
Situation understands the concrete meaning of above-mentioned term in the present invention.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Embodiment is described in detail below in conjunction with attached drawing.
In order to better understand the utility model, below with reference to FIG. 1 to FIG. 7 to the charge output element of the utility model,
Assembly method and piezoelectric acceleration sensor are described in detail.
Also referring to shown in Fig. 1, Fig. 2, Fig. 1 is a kind of vertical view knot of charge output element of the utility model embodiment
Structure schematic diagram；Fig. 2 is a kind of the schematic diagram of the section structure of charge output element of the utility model embodiment.The electricity of the present embodiment
Lotus output element includes pedestal 10, piezoelectric element and quality block assembly 30.Pedestal 10 includes that there is the polygon of multiple sides to connect
Relay part 11.In order to process and easy to assembly, the edge of connecting component 11 can be regular polygon perpendicular to axial section, that is,
The shape of multiple sides of connecting component 11 is identical.Piezoelectric element includes at least two of the circumferentially-spaced distribution along connecting component 11
A piezoelectric unit 20, at least two piezoelectric units 20 are correspondingly connected with the setting of at least two sides in multiple sides of component 11.
Piezoelectric unit 20 includes at least one piezo-electric crystal 21, each piezo-electric crystal 21, and each piezo-electric crystal 21 is arranged in parallel.Quality block assembly
30 are set to the peripheral side of piezoelectric element, and piezoelectric element is between connecting component 11 and quality block assembly 30.More than, interconnecting piece
Part 11, piezoelectric element and quality block assembly 30 are mutually interference fitted, to guarantee the whole rigidity of charge output element.
In the present embodiment, connecting component 11 has multiple sides, is all provided with convenient for each surface side in connecting component 11
The piezoelectric unit 20 including at least one piezo-electric crystal 21 is set, the quantity of the piezo-electric crystal 21 of 11 side of connecting component can be increased
And space is saved, it is arranged in parallel by each piezo-electric crystal 21, is capable of increasing the sensitivity of charge output element, then increases piezoelectricity
The sensitivity of acceleration transducer.Further, connecting component 11, piezoelectric element and quality block assembly 30 are mutually interference fitted,
It is rigid contact between connecting component 11, piezoelectric element and quality block assembly 30, is not necessarily to adhesive layer, charge output can be increased
The rigidity of element entirety is then able to ascend the Frequency Response and resonance of piezoelectric acceleration sensor.
In some alternative embodiments, it please refers to shown in Fig. 3, Fig. 3 is another charge of the utility model embodiment
The overlooking structure diagram of output element.The piezo-electric crystal 21 of the charge output element of the present embodiment is bending laminated structure, should
Bending laminated structure and the shape of the side of connecting component 11 match.For bending the particular number of the bending part of laminated structure
The utility model with no restrictions, be bonded i.e. as long as can guarantee that shape that it is bent to form can be matched with the side of connecting component 11
It can.It is illustrated for bending laminated structure with a bending part in figure, there are four sides for the tool of connecting component 11, each curved
Folding laminated structure is correspondingly arranged on two sides of connecting component 11.It is understood that in order to guarantee charge output effect
Fruit, piezo-electric crystal 21 are symmetrical arranged in the side of connecting component 11.
In other optional embodiments, refering to Figure 1, piezo-electric crystal 21 can be flat sheet shape structure, put down
The straight shape of laminated structure and the shape of the side of connecting component 11 match, and each side of connecting component 11 is correspondingly arranged on
One piezoelectric unit 20.Piezo-electric crystal 21 uses straight laminated structure, is respectively provided with this convenient for each side in connecting component 11
The piezo-electric crystal 21 of shape, and each side can be stacked multiple piezo-electric crystals 21, each piezo-electric crystal is in parallel, can be effective
Increase the sensitivity of charge output element.Also, 21 structure of piezo-electric crystal of straight laminated structure is simple, easy processing, and is easy to
Superposition.
In some alternative embodiments, the normal direction of the circumferential surface along the connecting component 11 of each piezo-electric crystal 21
Two opposite surfaces be provided with conductive film, in order to the electrical connection of each piezo-electric crystal 21.Further, piezoelectric unit 20
Including the more than two piezo-electric crystals 21 being stacked in normal direction, the phase of adjacent two be stacked piezo-electric crystal 21
Mutually two close surface polarities are identical, in order to being arranged in parallel for each piezo-electric crystal 21.The piezo-electric crystal 21 of the present embodiment can
To use single crystal quartz, single crystal quartz has good thermal stability and temperature drift characteristic, and high sensitivity, the linearity are excellent, dielectric
Constant is high.And it is capable of increasing the sensitivity of charge output element by multiple single crystal quartz parallel connections, improves charge output element
Anti-interference ability.The conductive film of the opposite surface setting of two of piezo-electric crystal 21 can be gold-plated film, it is to be understood that
Piezo-electric crystal 21 polarize latter two be provided with the surface of conductive film polarity it is different.
In some alternative embodiments, charge output element further comprises electrode slice 80, electrode slice 80 and each layer
Piezo-electric crystal 21 is alternately stacked in the normal direction of the circumferential surface of connecting component 11, and the number of plies of electrode slice 80 compares piezo-electric crystal
More than 21 one layer.It please refers to shown in Fig. 4, Fig. 4 is a kind of structural schematic diagram of electrode slice of the utility model embodiment, the present embodiment
Electrode slice 80 include sticking part 81 and interconnecting piece 82, wherein the corresponding piezo-electric crystal 21 of sticking part 81 is arranged, interconnecting piece 82 and patch
Conjunction portion 81 is electrically connected, and each electrode slice 80 is made to form the cyclic structure body circumferentially disconnected.It is understood that the ring of the present embodiment
Shape structural body is the cyclic structure body of polygon, can be the cyclic structure body with three, four, five sides, for ring-type
The number of edges of structural body, with no restrictions, number of edges is consistent with the quantity of the side of connecting component 11 for the utility model.The present embodiment
In, the cyclic structure body of each odd-level is electrically connected by conducting line segment 83, and the cyclic structure body of each even level is also by conducting line segment 83
Electrical connection, with this, realizes the parallel connection of each piezo-electric crystal 21.Odd-level and even level in the present embodiment, can be for close to interconnecting piece
The piezo-electric crystal 21 of part 11 is first layer, is outward successively the second layer, third layer etc., or the pressure far from connecting component 11
Transistor 21 is first layer, is inwardly successively the second layer, third layer etc..In the present embodiment, for the link position of conducting line segment 83
The utility model is with no restrictions.But in order to reduce the height of charge output element, it is preferred that as shown in fig.5, Fig. 5 is this
The structural schematic diagram of odd-level or even level the electrode slice electrical connection of utility model embodiment, conducting line segment 83 are arranged in electrode slice 80
The electrode slice 80 of each odd-level, each even level is circumferentially electrically connected by the open position of side.The sticking part 81 of the present embodiment,
Interconnecting piece 82, conducting line segment 83 material all can be at least one of pure nickel or nichrome material.
It is square with the edge of connecting component 11 perpendicular to axial section, there are four sides for the tool of connecting component 11, each
Side is illustrated for being respectively provided with the piezo-electric crystal 21 of two layers of straight laminated structure, then, the side of connecting component 11 is provided with
Three layers of electrode slice 80, as shown in Figure 1 and Figure 5, centered on connecting component 11, side from inside to outside, first layer electrode slice 80 and
The gap of three layers of electrode slice 80 is located at the same position of the side of connecting component 11, and the end in the two circumferential direction passes through one
Conducting line segment 83 connects the ipsilateral end of the two, so that first layer electrode slice 80 and third layer electrode slice 80 connect into there are two tools
The integral structure of free end.
Further, in order to guarantee the good fit of piezo-electric crystal 21 Yu electrode slice 80, the sticking part 81 of electrode slice 80
Size should be greater than or equal to piezo-electric crystal 21 size.Optionally, the size of sticking part 81 is consistent with the size of piezo-electric crystal 21,
Just fitting completely, to avoid the interference of signal between the sticking part 81 of adjacent layer.The interconnecting piece 82 of electrode slice 80 along axial direction
Width be less than electrode slice 80 sticking part 81 along axial width, to reduce the resistance of entire electrode slice 80.
In some alternative embodiments, quality block assembly 30 includes circumferentially spaced multiple mass blocks 31, often
The peripheral side of a piezoelectric unit 20 is correspondingly arranged at least one mass block 31.Each mass block 31 is set to outermost electrode slice
80 peripheral side.Mass block 31 is bonded outermost electrode slice 80 and is arranged, and is interference fitted with electrode slice 80.Each mass block 31 is arranged
In the peripheral side of electrode slice 80, it is equivalent to whole disconnect in the circumferential of quality block assembly 30 and is arranged, be conveniently adjusted each mass block 31
Position, realize the interference fit of each mass block 31 with electrode slice 80.The quality block assembly 30 of the present embodiment can use 316L
Stainless steel material has stronger corrosion resistance and heat resistance.
In some alternative embodiments, charge output element further includes pyrocondensation ring 40, and pyrocondensation ring 40 is sheathed on mass block
Component 30, and be interference fitted with quality block assembly 30.The material of pyrocondensation ring 40 can be Ultimum Ti, and cold expansion processing adds
It is heat-shrinked.The pyrocondensation ring 40 of the present embodiment can increase pretightning force in side, so that connecting component 11, piezoelectric element and mass block
Component 30 is mutually interference fitted, and enhances the rigidity of charge output element entirety with this.
Further, the charge output element of the present embodiment further includes insulating trip 50, and insulating trip 50 is sheathed on connecting component
11, between connecting component 11 and piezoelectric unit 20.The setting of insulating trip 50 can to avoid piezoelectric element charge to connection
Component 11 moves, and then the measurement accuracy of piezoelectric acceleration sensor can be improved.The material of insulating trip 50 can be 95
Aluminium oxide ceramics has good insulating performance.For insulating trip 50 concrete shape the utility model with no restrictions, as long as can be real
Insulation between the electrode slice 80 and connecting component 11 of existing piezoelectric element, such as insulating trip 50 can be annular, be set in
In connecting component 11, between connecting component 11 and piezoelectric element, insulating trip 50 or laminated structure correspond to connection
Each side of component 11 is provided with an insulating trip 50, and 50 company of being respectively positioned on of insulating trip on each surface of connecting component 11
Between relay part 11 and innermost electrode slice 80.
The utility model additionally provides a kind of assembly method of charge output element, please refers to shown in Fig. 6, and Fig. 6 is this reality
With a kind of assembly method flow chart of charge output element of new embodiment.The assembly method of the present embodiment includes following step
It is rapid:
Step 601, pedestal is heat-treated, to eliminate the machining stress in pedestal.
Pedestal 10 in the step includes the polygon connecting component 11 with multiple sides.The material selection of pedestal 10
Alpha+beta titanium alloys, density 3g/cm-3~5g/cm-3, elasticity modulus is 1.0 × 105MPa~1.2 × 105MPa, is had stronger
Specific strength.The alpha+beta titanium alloys of TC4 model can specifically be used.The pedestal 10 of machine-shaping is heat-treated, base can be eliminated
Machining stress in seat 10, the size of stabilizing base 10 increases the intensity of pedestal 10, and can remove pedestal 10 and be processed into
Increased harmful element (such as hydrogen) during type.Specific heat treatment process may include at annealing, solution treatment and failure
It is one or more in reason, and the heat treatment process of the present embodiment carries out under vacuum conditions.
Step 602, at least two piezoelectric units are set along the side interval of connecting component.
In the step, at least two sides that at least two piezoelectric units 20 are correspondingly connected in multiple sides of component 11 are set
It sets, piezoelectric unit 20 includes at least one piezo-electric crystal 21.
Step 603, each piezo-electric crystal is passed through into electrode slice parallel connection.
It is in the step, each piezo-electric crystal 21 is in parallel by electrode slice 80, the sensitivity of charge output element can be increased.
Step 604, quality block assembly is set in the peripheral side of piezoelectric unit.
Step 605, pyrocondensation ring set is located to outside and the heat shrink of quality block assembly, so that pyrocondensation ring, the quality
Block assembly, the piezoelectric unit and the connecting component are mutually interference fitted.
In the step, by 40 heat shrink of pyrocondensation ring, increases the pretightning force of side, realize quality block assembly 30, piezoelectricity
The interference fit of unit 20, electrode slice 80 and connecting component 11.
In the present embodiment, the pedestal of machine-shaping 10 is heat-treated, the machining stress in pedestal 10 can be eliminated,
The size of stabilizing base 10, increases the intensity of pedestal 10, and can remove that pedestal 10 is increased during machine-shaping to be had
Evil element (such as hydrogen).Connecting component 11 has multiple sides, and the setting of at least two sides includes at least one piezo-electric crystal 21
Piezoelectric unit 20, the quantity of piezo-electric crystal 21 can be increased and save space, piezo-electric crystal 21 set by 80 parallel connection of electrode slice
It sets, is capable of increasing the sensitivity of charge output element.In addition, increasing axial pre tightening force by pyrocondensation ring 40, quality block assembly is realized
30, the interference fit of piezoelectric unit 20 and connecting component 11, can increase the rigidity of charge output element entirety, and then can mention
Rise the Frequency Response and resonance of piezoelectric acceleration sensor.
The utility model additionally provides a kind of piezoelectric acceleration sensor, shown referring to Figure 7 together, and Fig. 7 is that this is practical
A kind of the schematic diagram of the section structure of piezoelectric acceleration sensor of new embodiment.The piezoelectric acceleration sensor of the present embodiment includes upper
State the charge output element, shell 60 and signal export structure 70 of embodiment.Shell 60 is around charge output element and is set to
On pedestal 10, shell 60 can be sealed and protect to charge output element.Signal export structure 70 and quality block assembly 30
It is electrically connected with piezoelectric element, specifically, can realize signal export structure 70 and quality block assembly by two bars transmission lines
30, the electrical connection of piezoelectric element, wherein one end of a signal line is connected to quality block assembly 30, it is defeated that the other end is connected to signal
Structure 70 out, one end of another signal line are connected to the electrode slice 80 not being in electrical contact with quality block assembly 30, other end connection
To signal export structure 70.Signal of charge output element outside can be sent to by signal export structure 70 with this to set
It is standby.The shell 60 of the piezoelectric acceleration sensor of the present embodiment can use heat treatment process identical as pedestal 10, to eliminate shell
Machining stress in body 60 stablizes the size of shell 60, increases the intensity of shell 60, and can remove shell 60 in machine-shaping
Increased harmful element in the process.With this, the rigidity of piezoelectric acceleration sensor entirety can be increased.
Since the piezoelectric acceleration sensor of the utility model embodiment includes the charge output element of above-described embodiment, because
This, the beneficial effect of the charge output element with above-described embodiment, details are not described herein.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can be readily occurred in various
Equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this is practical
Novel protection scope should be subject to the protection scope in claims.
Claims (10)
1. a kind of charge output element characterized by comprising
Pedestal, including the polygon connecting component with multiple sides；
Piezoelectric element, at least two piezoelectric units including the circumferentially-spaced distribution along the connecting component, described at least two
Piezoelectric unit corresponds to the setting of at least two sides in the multiple side of the connecting component, and the piezoelectric unit includes extremely
A few piezo-electric crystal, each piezo-electric crystal are arranged in parallel；
Quality block assembly, is set to the peripheral side of the piezoelectric element, the piezoelectric element be located at the connecting component with it is described
Between quality block assembly；
Wherein, the connecting component, the piezoelectric element and the quality block assembly are mutually interference fitted.
2. charge output element according to claim 1, which is characterized in that the piezo-electric crystal is bending laminated structure,
The bending laminated structure and the shape of the side of the connecting component match.
3. charge output element according to claim 1, which is characterized in that the piezo-electric crystal is straight laminated structure,
The shape of the straight laminated structure and the shape of the side of the connecting component match, and each of described connecting component is described
Side is correspondingly arranged on the piezoelectric unit.
4. charge output element according to claim 2 or 3, which is characterized in that each piezo-electric crystal along described
Two opposite surfaces of the normal direction of the circumferential surface of connecting component are provided with conductive film, and the piezoelectric unit is included in described
More than two piezo-electric crystals that normal direction is stacked, adjacent two be stacked the piezo-electric crystal it is mutual
The polarity on two close surfaces is identical.
5. charge output element according to claim 4, which is characterized in that further comprise:
Electrode slice replaces in the normal direction with the piezo-electric crystal of each layer and is stacked, the number of plies of the electrode slice
One layer more than the piezo-electric crystal, the electrode slice includes sticking part and interconnecting piece, and the sticking part corresponds to the piezo-electric crystal
Setting, the interconnecting piece are electrically connected with the sticking part, form the electrode slice along the cyclic structure body circumferentially disconnected；
Wherein, the electrode slice of each odd-level is electrically connected by conducting line segment, and the electrode slice of each even level is led by described
Line segment electrical connection, so that each piezo-electric crystal is in parallel.
6. charge output element according to claim 5, which is characterized in that the size of the sticking part is greater than or equal to institute
The size of piezo-electric crystal is stated, so that the piezo-electric crystal can be bonded with the sticking part completely completely；And/or
The interconnecting piece along the axial width of the connecting component be less than the sticking part along the axial width.
7. charge output element according to claim 5, which is characterized in that disconnection of the conducting line segment in the electrode slice
The electrode slice of each odd-level is circumferentially electrically connected by position；And the conducting line segment is on the open position edge of the electrode slice
The circumferential electrode slice by each even level is electrically connected.
8. charge output element according to claim 1, which is characterized in that the quality block assembly includes along the circumferential direction
The multiple mass blocks being spaced apart, the peripheral side of each piezoelectric unit are correspondingly arranged at least one described mass block.
9. charge output element according to claim 1, which is characterized in that further comprise:
Pyrocondensation ring, is sheathed on the quality block assembly, and the pyrocondensation ring and the quality block assembly are interference fitted；
Insulating trip is sheathed on the connecting component, between the connecting component and the piezoelectric unit.
10. a kind of piezoelectric acceleration sensor characterized by comprising
Charge output element is the described in any item charge output elements of claim 1 to 9；
Shell around the charge output element, and is set on the pedestal；
Signal export structure is electrically connected with the piezoelectric element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920375471.9U CN209544395U (en) | 2019-03-22 | 2019-03-22 | Charge output element and piezoelectric acceleration sensor |
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