CN204989225U - Piezoelectric acceleration sensor - Google Patents
Piezoelectric acceleration sensor Download PDFInfo
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- CN204989225U CN204989225U CN201520492806.7U CN201520492806U CN204989225U CN 204989225 U CN204989225 U CN 204989225U CN 201520492806 U CN201520492806 U CN 201520492806U CN 204989225 U CN204989225 U CN 204989225U
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- piezoelectric patches
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- pedestal
- mass
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Abstract
The utility model discloses a piezoelectric acceleration sensor, connect sensing device on the base including the base with through fixing bolt, sensing device include first piezoelectric patches, set up second piezoelectric patches on the base, set up the sheetmetal between first piezoelectric patches and second piezoelectric patches, the top of first piezoelectric patches be provided with the quality piece, the top of quality piece is provided with damping spring, its characterized in that: second piezoelectric patches and base between, all be provided with the insulating layer between first piezoelectric patches and the quality piece, the base on be provided with the lead wire fairlead, first piezoelectric patches and second piezoelectric patches constitute by a plurality of piezoelectric patchess are parallelly connected, its degree of accuracy is high, good reliability and sensitivity are high.
Description
Technical field
The utility model relates to sensor field, particularly, relates to a kind of piezoelectric acceleration transducer.
Background technology
Piezoelectric acceleration transducer is also known as piezoelectric accelerometer, and it also belongs to inertial sensor.It utilizes Cucumber as the piezoelectric effect of quartz crystal, and when accelerometer is vibrated, the power that mass adds on the piezoelectric element also changes thereupon.When the natural frequency of tested vibration frequency far below accelerometer, then the change of power is directly proportional to by measuring acceleration.Existing a kind of piezoelectric acceleration transducer it comprise piezoelectric patches, be arranged on the sheet metal in the middle of piezoelectric patches, the piezoelectric patches of sheet metal both sides directly contacts with mass with pedestal.In use, the electric charge of piezoelectric patches easily conducts, and makes final measurement data unreliable and sensitivity is not high.
Utility model content
The utility model provides a kind of piezoelectric acceleration transducer to solve the problems of the technologies described above, and accuracy is high, and reliability is strong and highly sensitive
The technical scheme in the invention for solving the above technical problem is:
Piezoelectric acceleration transducer, comprise pedestal and be connected to pedestal upper sensor part by set bolt, described senser element comprises the first piezoelectric patches, be arranged on the second piezoelectric patches on pedestal, be arranged on the sheet metal between the first piezoelectric patches and the second piezoelectric patches, the top of the first described piezoelectric patches is provided with mass, the top of described mass is provided with damping spring, it is characterized in that: between the second described piezoelectric patches and pedestal, insulation course is provided with between first piezoelectric patches and mass, described pedestal is provided with lead-in wire fairlead, the first described piezoelectric patches and the second piezoelectric patches are formed by multiple piezoelectric patches parallel connection.
The utility model improves on the basis of existing technology: one, between the second piezoelectric patches and pedestal, between the first piezoelectric patches and mass, insulation course is set, insulation protection is carried out to piezoelectric patches, avoids electric charge to be moved, improve the reliability of accuracy and subsequent treatment data; Its two, first piezoelectric patches and the second piezoelectric patches are formed by multiple piezoelectric patches parallel connection, strengthen its sensitivity; Its three, pedestal arranges lead-in wire fairlead, is convenient to the extraction gone between, convenient encapsulation.
Connecting lead wire on sheet metal, go between from lead-in wire fairlead in draw.When measuring, when vibration experienced by sensor, because the rigidity of damping spring is quite large, and the quality of mass is relatively little, can think that the inertia of mass is very little, therefore, mass experiences the vibration identical with sensor base, and be subject to the inertial force effect contrary with acceleration direction, like this, mass acts on piezoelectric patches with regard to there being an alternating force being proportional to acceleration.Because piezoelectric patches has piezoelectric effect, its surface can produce alternation electric charge, and when the natural frequency of frequency lower than sensor vibrated, the output charge of sensor is directly proportional to acting force, is namely directly proportional to the acceleration of test specimen.
As preferably, described piezoelectric patches is shearing-type piezoelectric element.
Further, described piezoelectric patches is piezoceramic material or piezoelectric crystal material.
As preferably, for the ease of follow-up data quantity circuit to the process of data, the piezoelectric patches quantity that the first described piezoelectric patches and the second piezoelectric patches are in parallel is equal.
As preferably, the first described piezoelectric patches and the second piezoelectric patches compose in parallel by 10 piezoelectric patches.
To sum up, the beneficial effects of the utility model are:
1, between the second piezoelectric patches of the present utility model and pedestal, between the first piezoelectric patches and mass, insulation course is set, insulation protection is carried out to piezoelectric patches, avoids electric charge to be moved, improve the reliability of accuracy and subsequent treatment data.
2, the first piezoelectric patches of the present utility model and the second piezoelectric patches are formed by multiple piezoelectric patches parallel connection, and it is highly sensitive.
3, pedestal of the present utility model arranges lead-in wire fairlead, be convenient to the extraction gone between, convenient encapsulation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Mark and corresponding parts title in accompanying drawing: 1, pedestal; 21, the first piezoelectric patches; 22, the second piezoelectric patches; 3, sheet metal; 4, mass; 5, damping spring; 6, insulation course; 7, go between fairlead.
Embodiment
Below in conjunction with embodiment and accompanying drawing, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1:
A kind of piezoelectric acceleration transducer as shown in Figure 1, comprise pedestal 1 and be connected to pedestal 1 upper sensor part by set bolt, described senser element comprises the first piezoelectric patches 21, be arranged on the second piezoelectric patches 22 on pedestal 1, be arranged on the sheet metal 3 between the first piezoelectric patches 21 and the second piezoelectric patches 22, the top of the first described piezoelectric patches 21 is provided with mass 4, the top of described mass 4 is provided with damping spring 5, in order to avoid the electric charge on piezoelectric patches is moved, between the second described piezoelectric patches 22 and pedestal 1, insulation course 6 is provided with between first piezoelectric patches 21 and mass 4, for the ease of the extraction of lead-in wire, be convenient to encapsulation, described pedestal 1 is provided with lead-in wire fairlead 7, in order to further strengthen its sensitivity, the first described piezoelectric patches 21 and the second piezoelectric patches 22 are formed by multiple piezoelectric patches parallel connection.
Embodiment 2:
A kind of piezoelectric acceleration transducer as shown in Figure 1, the present embodiment is optimized on the basis of above-described embodiment, and namely described piezoelectric patches 2 is shearing-type piezoelectric element.
Described piezoelectric patches 2 is piezoceramic material or piezoelectric crystal material.
Embodiment 3:
A kind of piezoelectric acceleration transducer as shown in Figure 1, the present embodiment is optimized on the basis of above-described embodiment, and the piezoelectric patches quantity that the first namely described piezoelectric patches 21 and the second piezoelectric patches 22 are in parallel is equal.
The first described piezoelectric patches 21 and the second piezoelectric patches 22 compose in parallel by 10 piezoelectric patches.
As mentioned above, the utility model can be realized preferably.
Claims (5)
1. piezoelectric acceleration transducer, comprise pedestal (1) and be connected to pedestal (1) upper sensor part by set bolt, described senser element comprises the first piezoelectric patches (21), be arranged on the second piezoelectric patches (22) on pedestal (1), be arranged on the sheet metal (3) between the first piezoelectric patches (21) and the second piezoelectric patches (22), the top of described the first piezoelectric patches (21) is provided with mass (4), the top of described mass (4) is provided with damping spring (5), it is characterized in that: between described the second piezoelectric patches (22) and pedestal (1), insulation course (6) is provided with between first piezoelectric patches (21) and mass (4), described pedestal (1) is provided with lead-in wire fairlead (7), described the first piezoelectric patches (21) and the second piezoelectric patches (22) are formed by multiple piezoelectric patches parallel connection.
2. piezoelectric acceleration transducer according to claim 1, is characterized in that: described piezoelectric patches (2) is shearing-type piezoelectric element.
3. piezoelectric acceleration transducer according to claim 1 and 2, is characterized in that: described piezoelectric patches (2) is piezoceramic material or piezoelectric crystal material.
4. piezoelectric acceleration transducer according to claim 1, is characterized in that: the piezoelectric patches quantity that described the first piezoelectric patches (21) and the second piezoelectric patches (22) are in parallel is equal.
5. piezoelectric acceleration transducer according to claim 1, is characterized in that: described the first piezoelectric patches (21) and the second piezoelectric patches (22) compose in parallel by 10 piezoelectric patches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520492806.7U CN204989225U (en) | 2015-07-10 | 2015-07-10 | Piezoelectric acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520492806.7U CN204989225U (en) | 2015-07-10 | 2015-07-10 | Piezoelectric acceleration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204989225U true CN204989225U (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520492806.7U Expired - Fee Related CN204989225U (en) | 2015-07-10 | 2015-07-10 | Piezoelectric acceleration sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN204989225U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950136A (en) * | 2015-07-10 | 2015-09-30 | 四川奇胜科技有限公司 | Piezoelectric acceleration sensor with improved structure |
| CN107238730A (en) * | 2017-04-28 | 2017-10-10 | 苏州东菱振动试验仪器有限公司 | A kind of piezoelectric type high-frequency vibrating table |
-
2015
- 2015-07-10 CN CN201520492806.7U patent/CN204989225U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950136A (en) * | 2015-07-10 | 2015-09-30 | 四川奇胜科技有限公司 | Piezoelectric acceleration sensor with improved structure |
| CN107238730A (en) * | 2017-04-28 | 2017-10-10 | 苏州东菱振动试验仪器有限公司 | A kind of piezoelectric type high-frequency vibrating table |
| CN107238730B (en) * | 2017-04-28 | 2023-08-25 | 苏州东菱振动试验仪器有限公司 | Piezoelectric high-frequency vibration table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20200710 |