CN202049175U - Piezoelectric acceleration sensor - Google Patents
Piezoelectric acceleration sensor Download PDFInfo
- Publication number
- CN202049175U CN202049175U CN2011201308238U CN201120130823U CN202049175U CN 202049175 U CN202049175 U CN 202049175U CN 2011201308238 U CN2011201308238 U CN 2011201308238U CN 201120130823 U CN201120130823 U CN 201120130823U CN 202049175 U CN202049175 U CN 202049175U
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- piezoelectric device
- piezoelectric
- shell
- circuit board
- connector
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Abstract
The utility model discloses a piezoelectric acceleration sensor with modified structural design, comprising a shell, a base, a piezoelectric device, a mass block, a connector, a protective layer and a circuit board, wherein the piezoelectric device is nested with a central shaft of the base; the mass block is nested with the piezoelectric device; the circuit board is arranged on the mass block; the base, the piezoelectric device, the mass block and the circuit board are nested in the protective layer and arranged in the shell; the connector is welded at the upper end of the shell; the circuit board is provided with an amplification modulation circuit used for amplifying an electric signal generated by the piezoelectric device; the built-in protective layer can effectively prevent electromagnetic interference; the structural design is modified so that a product has more stable performances, a wide frequency response scope, low vibration and shock limit, small transverse crosstalk and low amplitude nonlinearity; simultaneously, the piezoelectric acceleration sensor has functions of shell isolation, ESD protection, reverse wiring protection and the like so that the stability of the product is further reinforced; and the veracity of output data is ensured by the perfect signal amplification modulation circuit.
Description
Technical field
The utility model relates to the acceleration transducer technical field, relates in particular to a kind of piezoelectric acceleration transducer.
Background technology
Acceleration transducer is the testing tool that the pressure that physical phenomenon produced such as degree of will speed up, vibrations, impact are transformed into the electric signal of being convenient to measure.Piezoelectric acceleration transducer is to utilize " piezoelectric effect " of piezoelectric element wherein to go to detect mechanical quantity.
General piezoelectric acceleration transducer is suit piezoelectric device and a mass on the centre frame projecting shaft of housing base, and when the stressed motion of housing base, the inertia effect of mass will make piezoelectric device produce corresponding electric signal.Traditional piezoelectric acceleration transducer is because structural design, materials used, and the limitation of production technology etc. causes product ubiquity instability, and Hz-KHz is narrow, impacts problems such as the limit and vibration mark are little, and product can only be used for the coarse measurement of low precision.
Summary of the invention
For overcoming the problems referred to above, the utility model proposes a kind of piezoelectric acceleration transducer that improves structural design, can be widely used in aspects such as the energy, power station, wind energy, petroleum pipe line, steel works equipment, railway, train, car knock, habitata.
For achieving the above object, the technical scheme that the utility model proposed is: a kind of piezoelectric acceleration transducer comprises: shell, pedestal, piezoelectric device, mass and connector is characterized in that: also comprise a protective seam and a circuit board; Described piezoelectric device is placed on the central shaft of pedestal; Described mass is placed on the piezoelectric device, is equipped with a circuit board on it; Described pedestal, piezoelectric device, mass and board sleeve place enclosure in protective seam; Described connector is welded in the shell upper port.
Further, described connector is the two-wire cable connector.
Further, described pedestal is one to be provided with the ladder frustum cone structure of central shaft.
Further, the bottom of described shell is provided with a screw.
Preferably, described protective seam combines with pedestal by welding; Described pedestal is by the gluing enclosure that is connected to.
Further, be the amplification modulate circuit on the described circuit board.
The beneficial effects of the utility model: built-in protective seam can effectively prevent electromagnetic interference (EMI); Improve structural design, make properties of product more stable, Hz-KHz is wide, vibration and to impact the limit low, and lateral cross talk is little, and the amplitude non-linearity degree is low; Have shell simultaneously and isolate, esd protection, reverse wiring protections etc. further strengthen the stability of product; Perfect signal amplifying and conditioning circuit has guaranteed the accuracy of output data.
Description of drawings
Fig. 1 is the finished product profile and the explosive view of sensor of the present utility model;
Fig. 2 is the diagrammatic cross-section of sensor of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
As illustrated in fig. 1 and 2, piezoelectric acceleration transducer of the present utility model comprises shell 1, pedestal 2, piezoelectric device 3, mass 4 and connector 7, also comprises a protective seam 5 and a circuit board 6; Described piezoelectric device 3 is placed on the central shaft of pedestal 2; Described mass 4 is placed on the piezoelectric device 3, is equipped with a circuit board 6 on it; Described pedestal 2, piezoelectric device 3, mass 4 and circuit board 6 are placed in the protective seam 5, place shell 1 inside; Described connector 7 is welded in shell 1 upper port.Circuit board 6 is provided with the amplification modulate circuit, is used for the electric signal that amplification piezoelectric device 3 produces.
Principle of work: piezoelectric acceleration transducer of the present utility model is installed in the position of required detection, during vibration, the inertial force of mass 4 forces piezoelectric device 3 to produce electric charge, and electric charge is done terminal processes through connector 7 cable transmission to computing machine by the amplification modulate circuit commentaries on classics of circuit board 6.The centre has added protective seam 5, can effectively prevent electromagnetic interference (EMI), simultaneously by the electric welding sealed package, has guaranteed the sealing of product, thereby guarantees that electric charge output can distortion, through the amplification of perfect signal amplifying and conditioning circuit, to obtain output data accurately.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; the various variations that the utility model is made are protection domain of the present utility model in the form and details.
Claims (6)
1. piezoelectric acceleration transducer, comprising: shell, pedestal, piezoelectric device, mass and connector is characterized in that: also comprise a protective seam and a circuit board; Described piezoelectric device is placed on the central shaft of pedestal; Described mass is placed on the piezoelectric device, and circuit board is installed on it; Described pedestal, piezoelectric device, mass and board sleeve place enclosure in protective seam; Described connector is welded in the shell upper port.
2. a kind of piezoelectric acceleration transducer as claimed in claim 1 is characterized in that: described connector is the two-wire cable connector.
3. a kind of piezoelectric acceleration transducer as claimed in claim 1 is characterized in that: described pedestal is one to be provided with the ladder frustum cone structure of central shaft.
4. a kind of piezoelectric acceleration transducer as claimed in claim 1 is characterized in that: the bottom of described shell is provided with a screw.
5. a kind of piezoelectric acceleration transducer as claimed in claim 1 is characterized in that: described protective seam combines with pedestal by welding manner; Described pedestal is by the gluing enclosure that is connected to.
6. a kind of piezoelectric acceleration transducer as claimed in claim 1 is characterized in that: be the amplification modulate circuit on the described circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201308238U CN202049175U (en) | 2011-04-28 | 2011-04-28 | Piezoelectric acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201308238U CN202049175U (en) | 2011-04-28 | 2011-04-28 | Piezoelectric acceleration sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049175U true CN202049175U (en) | 2011-11-23 |
Family
ID=44989480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201308238U Expired - Lifetime CN202049175U (en) | 2011-04-28 | 2011-04-28 | Piezoelectric acceleration sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202049175U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749398A (en) * | 2013-12-27 | 2015-07-01 | 安徽容知日新信息技术有限公司 | High-voltage-resistant built-in IC piezoelectric acceleration sensor and joint thereof |
| CN106405149A (en) * | 2016-09-29 | 2017-02-15 | 北京理工大学 | Impact type piezoelectric acceleration sensor |
| CN107110885A (en) * | 2015-06-26 | 2017-08-29 | 厦门乃尔电子有限公司 | Shearing-type piezoelectric transducer |
| WO2018224036A1 (en) * | 2017-06-09 | 2018-12-13 | 西人马（厦门）科技有限公司 | Three-axis piezoelectric sensor |
-
2011
- 2011-04-28 CN CN2011201308238U patent/CN202049175U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749398A (en) * | 2013-12-27 | 2015-07-01 | 安徽容知日新信息技术有限公司 | High-voltage-resistant built-in IC piezoelectric acceleration sensor and joint thereof |
| CN104749398B (en) * | 2013-12-27 | 2018-03-27 | 安徽容知日新科技股份有限公司 | High pressure resistant built-in IC piezoelectric acceleration transducers and its joint |
| CN107110885A (en) * | 2015-06-26 | 2017-08-29 | 厦门乃尔电子有限公司 | Shearing-type piezoelectric transducer |
| CN106405149A (en) * | 2016-09-29 | 2017-02-15 | 北京理工大学 | Impact type piezoelectric acceleration sensor |
| WO2018224036A1 (en) * | 2017-06-09 | 2018-12-13 | 西人马（厦门）科技有限公司 | Three-axis piezoelectric sensor |
| US11162973B2 (en) | 2017-06-09 | 2021-11-02 | Fatri Unied Testing & Control (Quanzhou) Technologies Co., Ltd. | Three-axis piezoelectric accelerometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111123 Effective date of abandoning: 20140827 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |