CN104950136A - Piezoelectric acceleration sensor with improved structure - Google Patents
Piezoelectric acceleration sensor with improved structure Download PDFInfo
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- CN104950136A CN104950136A CN201510400295.6A CN201510400295A CN104950136A CN 104950136 A CN104950136 A CN 104950136A CN 201510400295 A CN201510400295 A CN 201510400295A CN 104950136 A CN104950136 A CN 104950136A
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Abstract
The invention discloses a piezoelectric acceleration sensor with an improved structure. The piezoelectric acceleration sensor comprises a base and a sensing device connected onto the base through a fixed bolt, wherein the sensing device comprises a first piezoelectric patch, a second piezoelectric patch arranged on the base as well as a metal sheet arranged between the first piezoelectric patch and the second piezoelectric patch; a mass block is arranged above the first piezoelectric patch, and a piezo-resistance spring is arranged above the mass block. The piezoelectric acceleration sensor is characterized in that insulating layers are arranged between the second piezoelectric patch and the base and between the first piezoelectric patch and the mass block, a lead outlet is formed in the base, and each of the first piezoelectric patch and the second piezoelectric patch is formed by connecting a plurality of piezoelectric patches in parallel. The piezoelectric acceleration sensor has high accuracy, reliability and sensitivity.
Description
Technical field
The present invention relates to sensor field, particularly, relate to a kind of piezoelectric acceleration transducer of modified node method.
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 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.
Summary of the invention
The present invention provides a kind of piezoelectric acceleration transducer of modified node method in order to solve the problems of the technologies described above, accuracy is high, and reliability is strong and highly sensitive
The present invention's adopted technical scheme that solves the problem is:
A kind of piezoelectric acceleration transducer of modified node method, 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 present invention 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 invention has the beneficial effects as follows:
1, between the second piezoelectric patches of the present invention 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 invention and the second piezoelectric patches are formed by multiple piezoelectric patches parallel connection, and it is highly sensitive.
3, pedestal of the present invention 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 invention.
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 embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
The piezoelectric acceleration transducer of a kind of modified node method 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:
The piezoelectric acceleration transducer of a kind of modified node method 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:
The piezoelectric acceleration transducer of a kind of modified node method 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 present invention can be realized preferably.
Claims (5)
1. the piezoelectric acceleration transducer of a modified node method, 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. the piezoelectric acceleration transducer of a kind of modified node method according to claim 1, is characterized in that: described piezoelectric patches (2) is shearing-type piezoelectric element.
3. the piezoelectric acceleration transducer of a kind of modified node method according to claim 1 and 2, is characterized in that: described piezoelectric patches (2) is piezoceramic material or piezoelectric crystal material.
4. the piezoelectric acceleration transducer of a kind of modified node method 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. the piezoelectric acceleration transducer of a kind of modified node method 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 |
|---|---|---|---|
| CN201510400295.6A CN104950136A (en) | 2015-07-10 | 2015-07-10 | Piezoelectric acceleration sensor with improved structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510400295.6A CN104950136A (en) | 2015-07-10 | 2015-07-10 | Piezoelectric acceleration sensor with improved structure |
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| CN104950136A true CN104950136A (en) | 2015-09-30 |
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| CN201510400295.6A Pending CN104950136A (en) | 2015-07-10 | 2015-07-10 | Piezoelectric acceleration sensor with improved structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102160A (en) * | 2017-05-27 | 2017-08-29 | 天府认证有限公司 | The acceleration transducer protected with thermoelectricity |
| CN109920906A (en) * | 2019-03-22 | 2019-06-21 | 西人马（厦门）科技有限公司 | Charge output element, assembly method and piezoelectric acceleration sensor |
| CN109991440A (en) * | 2017-12-30 | 2019-07-09 | 大连良华科技有限公司 | A kind of piezoelectric acceleration transducer |
| CN110470373A (en) * | 2019-08-16 | 2019-11-19 | 东南大学 | A kind of two-way bridge vibration monitoring device |
| CN110875956A (en) * | 2019-11-21 | 2020-03-10 | 刘肇基 | Student safety monitoring system based on Internet of things |
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| CN1904621A (en) * | 2006-08-04 | 2007-01-31 | 重庆大学 | Piezoelectric three dimension acceleration sensor |
| US20130014586A1 (en) * | 2011-07-12 | 2013-01-17 | Weston Aerospace Limited | Dual output accelerometer system |
| US8375793B2 (en) * | 2011-02-10 | 2013-02-19 | Dytran Instruments, Inc. | Accelerometer for high temperature applications |
| CN203561647U (en) * | 2013-11-27 | 2014-04-23 | 黑龙江科技大学 | Piezoelectric accelerometer |
| CN204989225U (en) * | 2015-07-10 | 2016-01-20 | 四川奇胜科技有限公司 | Piezoelectric acceleration sensor |
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Patent Citations (5)
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| CN1904621A (en) * | 2006-08-04 | 2007-01-31 | 重庆大学 | Piezoelectric three dimension acceleration sensor |
| US8375793B2 (en) * | 2011-02-10 | 2013-02-19 | Dytran Instruments, Inc. | Accelerometer for high temperature applications |
| US20130014586A1 (en) * | 2011-07-12 | 2013-01-17 | Weston Aerospace Limited | Dual output accelerometer system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102160A (en) * | 2017-05-27 | 2017-08-29 | 天府认证有限公司 | The acceleration transducer protected with thermoelectricity |
| CN109991440A (en) * | 2017-12-30 | 2019-07-09 | 大连良华科技有限公司 | A kind of piezoelectric acceleration transducer |
| CN109920906A (en) * | 2019-03-22 | 2019-06-21 | 西人马（厦门）科技有限公司 | Charge output element, assembly method and piezoelectric acceleration sensor |
| CN110470373A (en) * | 2019-08-16 | 2019-11-19 | 东南大学 | A kind of two-way bridge vibration monitoring device |
| CN110875956A (en) * | 2019-11-21 | 2020-03-10 | 刘肇基 | Student safety monitoring system based on Internet of things |
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Application publication date: 20150930 |