CN103968938A - Vibrating frequency detecting device - Google Patents
Vibrating frequency detecting device Download PDFInfo
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- CN103968938A CN103968938A CN201410204219.3A CN201410204219A CN103968938A CN 103968938 A CN103968938 A CN 103968938A CN 201410204219 A CN201410204219 A CN 201410204219A CN 103968938 A CN103968938 A CN 103968938A
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- singing piece
- piezoelectricity singing
- vibrating member
- piece
- vibration frequency
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Abstract
A vibrating frequency detecting device comprises a casing, a piezoelectric buzzing piece and a vibrating part. An opening is formed in at least one side of the casing, the piezoelectric buzzing piece is used for converting mechanical deformation into electric signals, the piezoelectric buzzing piece is connected with the casing and covers one opening to enable the casing to form an accommodating cavity, the vibrating part is accommodated in the accommodating cavity and can press the piezoelectric buzzing piece to enable the piezoelectric buzzing piece to generate mechanical deformation, and the vibrating part can move in the accommodating cavity to change the deformation quantity of the piezoelectric buzzing piece. When being affected by the outside to vibrate slightly, the vibrating part moves in the accommodating cavity and presses the piezoelectric buzzing piece. At the moment, the piezoelectric buzzing piece can generate mechanical deformation through action force, can convert the mechanical deformation into electric signals and outputs the electric signals. The larger the deformation quantity is, the more obvious the change of the outputted electric signals is. Due to the fact that the gravity of the vibrating part is constant, the change of the electric signals outputted by the piezoelectric buzzing piece is matched with the moving frequency, namely slight vibrating frequency, of the vibrating part. Thus, detection on the slight vibration is achieved, and the detecting accuracy is improved.
Description
Technical field
The present invention relates to vibration detection technology field, particularly relate to a kind of vibration frequency pick-up unit.
Background technology
Along with scientific and technological progress and social development, the detection of vibration frequency is widely used in actual life, for example, thereby electronic sphygmomanometer is by arranging vibration frequency pick-up unit amount meter blood pressure, vibration detection device is installed on big machinery, detect vibration frequency in machine work process, can prevent that resonance is to the infringement of accuracy of machines etc.
At present, vibration frequency pick-up unit adopts the acceleration transducer of piezoelectric vibration device conventionally, when detecting axial masterpiece for piezoelectric vibration device, the harmonic motion frequency of piezoelectric vibration device changes, according to the variation of this harmonic motion frequency, detect the acceleration that imposes on acceleration transducer.Yet, adopt acceleration transducer to realize in the testing process of vibration frequency, to trickle vibration, cannot detect, cause accuracy of detection low.
Summary of the invention
Based on this, be necessary, for detecting trickle vibration, to cause the problem that accuracy of detection is lower, a kind of vibration frequency pick-up unit that improves accuracy of detection is provided.
A vibration frequency pick-up unit, comprises
The housing of at least one side opening;
For mechanical deformation being converted to the piezoelectricity singing piece of electric signal, described piezoelectricity singing piece is connected with described housing and covers one of them opening, to form one with described housing, holds cavity; And
Vibrating member, holds cavity described in being contained in, and can press described piezoelectricity singing piece, so that described piezoelectricity singing piece produces mechanical deformation, to hold cavity movable described for described vibrating member, to change the deformation quantity of described piezoelectricity singing piece.
In an embodiment, described housing comprises two sidewalls that are oppositely arranged therein, and is connected to two roofs between sidewall, and described roof and described piezoelectricity singing piece are oppositely arranged.
In an embodiment, the spacing of described two sidewalls is mated with the size of described vibrating member between two sidewalls, and the spacing of described two sidewalls is less than the spacing between described roof and described piezoelectricity singing piece therein.
In an embodiment, described vibrating member is spherical therein.
In an embodiment, described vibrating member is steel ball therein.
In an embodiment, also comprise the amplifying circuit being electrically connected to piezoelectricity singing piece therein, described amplifying circuit is for amplifying the electric signal through piezoelectricity singing piece output.
Above-mentioned vibration frequency pick-up unit, comprises housing, piezoelectricity singing piece and vibrating member, at least one side opening of housing, piezoelectricity singing piece is connected with housing and covers one of them opening, to form one, hold cavity, vibrating member is contained in and holds cavity, and movable within this holds cavity.When being subject to the trickle vibration of ectocine generation, vibrating member moves within holding cavity, and presses piezoelectricity singing piece, now piezoelectricity singing piece is subject to acting force and produces mechanical deformation, and mechanical deformation is converted to electric signal output, and deformation quantity is larger, and the variation of the electric signal of output is more obvious.Because vibrating member gravity immobilizes, so the variation of electric signal and the motion frequency of vibrating member of piezoelectricity singing piece output are that trickle vibration frequency matches, thereby realize the detection of trickle vibration, improved accuracy of detection.
Accompanying drawing explanation
Fig. 1 is the structural representation of the vibration frequency pick-up unit of an embodiment;
Fig. 2 is the circuit diagram of the vibration frequency pick-up unit amplifying circuit of an embodiment.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing, provided preferred embodiment of the present invention.But the present invention can realize in many different forms, be not limited to embodiment described herein.On the contrary, providing the object of these embodiment is to make to the understanding of disclosure of the present invention more thoroughly comprehensively.
It should be noted that, when element is called as " being fixed on " another element, can directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may have centering elements simultaneously.
Unless otherwise defined, all technology of using are herein identical with the implication that belongs to the common understanding of those skilled in the art of the present invention with scientific terminology.The term using in instructions of the present invention herein, just in order to describe the object of specific embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
As shown in Figure 1, a kind of vibration frequency pick-up unit, comprises housing 110, piezoelectricity singing piece 120 and vibrating member 130.
At least one side opening of housing 110.Piezoelectricity singing piece 120 is for mechanical deformation is converted to electric signal, and piezoelectricity singing piece 120 is connected with housing 110 and covers one of them opening, and holds cavity 140 with housing 110 formation one.In order to improve maintainability, housing 110 and piezoelectricity singing piece 120 removably connect, and are threaded etc. as adopted.Certainly, housing 110 also can be fixedly connected with piezoelectricity singing piece 120, can realize forming and hold cavity 140, and vibrating member 130 can press the object of piezoelectricity singing piece 120.
Vibrating member 130 is contained in and holds cavity 140, and can press piezoelectricity singing piece 120, so that piezoelectricity singing piece 120 produces mechanical deformations, vibrating member 130 is to hold cavity 140 movable, to change the deformation quantity of piezoelectricity singing piece 120.When vibrating member 130 is when holding cavity 140 activity, in order to improve the effect that presses that presses piezoelectricity singing piece 120, hold cavity 140 sealings and arrange.Certainly, hold cavity 140 and also can not exclusively seal, can realize vibrating member 130 and hold the interior activity of cavity 140 and pressing the object of piezoelectricity singing piece 120.
Above-mentioned vibration frequency pick-up unit, when being subject to the trickle vibration of ectocine generation, vibrating member 130 is holding the interior motion of cavity 140, and press piezoelectricity singing piece 120, now piezoelectricity singing piece 120 is subject to acting force and produces mechanical deformation, and mechanical deformation is converted to electric signal output, and deformation quantity is larger, and the variation of the electric signal of output is more obvious.Because vibrating member 130 gravity immobilize, so the variation of electric signal and the motion frequency of vibrating member 130 of piezoelectricity singing piece 120 outputs are that trickle vibration frequency matches, thereby realize the detection of trickle vibration, improved accuracy of detection.
In addition, piezoelectricity singing piece 120 is connected with housing 110 and covers one of them opening.So, vibrating member 130, when holding cavity 140 motion, can directly contact and press with piezoelectricity singing piece 120, and being conducive to piezoelectricity singing piece 120 when there is trickle vibration can obtain by sensing, further improves the precision detecting.And vibrating member 130 is contained in and holds cavity 140, without being set separately, fixture fixes vibrating member 130, simple installation, long service life.
Refer to Fig. 1, in an embodiment, housing 110 comprises two sidewalls 112 that are oppositely arranged therein, and is connected to the roof 114 of 112 of two sidewalls, and roof 114 is oppositely arranged with piezoelectricity singing piece 120.When there is vibration, vibrating member 130 moves, and is subject to sidewall 112 and roof 114 rebound effects and presses piezoelectricity singing piece 120, makes piezoelectricity singing piece 120 produce mechanical deformations, and then obtains trickle vibration frequency according to the change in voltage being converted to.It is pointed out that housing 110 also can be other structure, can realize vibrating member 130 and hold the interior activity of cavity 140 and pressing the object of piezoelectricity singing piece 120.
Refer to Fig. 1, in an embodiment, the spacing of two sidewalls 112 is mated with the size of vibrating member 130 between two sidewalls 112 therein, thereby prevents that vibrating member 130 is in the direction motion parallel with piezoelectricity singing piece 120.The spacing of two sidewalls 112 is less than the spacing between roof 114 and piezoelectricity singing piece 120.So, 112 guiding function of two sidewalls, for vibrating member 130 provides direction of vibration path, between roof 114 and piezoelectricity singing piece 120 for vibrating member 130 provides activity space, thereby when there is vibration in vibrating member 130, can press piezoelectricity singing piece 120, guarantee to detect the precision of trickle vibration.In specific embodiment as shown in Figure 1, when being subject to the trickle vibration of ectocine vibration frequency pick-up unit generation, vibrating member 130 moves up and down.
Refer to Fig. 1, in an embodiment, vibrating member 130 is spherical therein.Adopt spherically, vibrating member 130 is point and the contacting of face with holding cavity 140, rubs little, the resistance that vibrating member 130 moves is little, and while guaranteeing the trickle vibration of extraneous generation, vibrating member 130 can be moved, thereby make piezoelectricity singing piece 120 that change in voltage occur, improve the sensitivity detecting.In the present embodiment, vibrating member 130 is steel ball, and steel density is large, presses effective.Certainly, vibrating member 130 also can be the element of other material, can realize the object that presses piezoelectricity singing piece 120.
Please participate in Fig. 2, in an embodiment, vibration frequency pick-up unit comprises amplifying circuit 150 therein, and amplifying circuit 150 is electrically connected to piezoelectricity singing piece 120, and amplifying circuit 150 is for amplifying the electric signal through piezoelectricity singing piece 120 outputs.After piezoelectricity singing piece 120 is subject to mechanical deformation, along with the increase of deformation quantity, also can there is marked change in the electric signal of piezoelectricity singing piece 120 outputs, and amplifying circuit 150 amplifies processing by electric signal, so that vibration can be detected more accurately.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. a vibration frequency pick-up unit, is characterized in that, comprises
The housing of at least one side opening;
For mechanical deformation being converted to the piezoelectricity singing piece of electric signal, described piezoelectricity singing piece is connected with described housing and covers one of them opening, to form one with described housing, holds cavity; And
Vibrating member, holds cavity described in being contained in, and can press described piezoelectricity singing piece, so that described piezoelectricity singing piece produces mechanical deformation, to hold cavity movable described for described vibrating member, to change the deformation quantity of described piezoelectricity singing piece.
2. vibration frequency pick-up unit according to claim 1, is characterized in that, described housing comprises two sidewalls that are oppositely arranged, and is connected to two roofs between sidewall, and described roof and described piezoelectricity singing piece are oppositely arranged.
3. vibration frequency pick-up unit according to claim 2, it is characterized in that, the spacing of described two sidewalls is mated with the size of described vibrating member between two sidewalls, and the spacing of described two sidewalls is less than the spacing between described roof and described piezoelectricity singing piece.
4. vibration frequency pick-up unit according to claim 1, is characterized in that, described vibrating member is spherical.
5. vibration frequency pick-up unit according to claim 4, is characterized in that, described vibrating member is steel ball.
6. vibration frequency pick-up unit according to claim 1, is characterized in that, also comprises the amplifying circuit being electrically connected to piezoelectricity singing piece, and described amplifying circuit is for amplifying the electric signal through piezoelectricity singing piece output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410204219.3A CN103968938A (en) | 2014-05-14 | 2014-05-14 | Vibrating frequency detecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410204219.3A CN103968938A (en) | 2014-05-14 | 2014-05-14 | Vibrating frequency detecting device |
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| CN103968938A true CN103968938A (en) | 2014-08-06 |
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| CN201410204219.3A Pending CN103968938A (en) | 2014-05-14 | 2014-05-14 | Vibrating frequency detecting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153181A (en) * | 2016-06-24 | 2016-11-23 | 济南大学 | A kind of piezoelectricity biomimetic sensor |
| CN108760028A (en) * | 2018-08-30 | 2018-11-06 | 深圳市刻锐智能科技有限公司 | Vibration alarm device |
| CN108964517A (en) * | 2017-05-21 | 2018-12-07 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of self-powered vibration frequency sensing system based on switched capacitor technique |
| CN109085440A (en) * | 2018-09-25 | 2018-12-25 | 华南理工大学 | A kind of piezo electrical property automatic testing method |
| CN109099970A (en) * | 2018-08-29 | 2018-12-28 | 广州市泺立能源科技有限公司 | High tower based on CORS technology monitors system |
| CN109099971A (en) * | 2018-08-29 | 2018-12-28 | 广州市泺立能源科技有限公司 | Power transmission tower remote supervision system based on CORS technology |
| CN110686769A (en) * | 2019-10-31 | 2020-01-14 | 珠海格力电器股份有限公司 | Vibration detection device, washing machine and vibration detection and control method of washing machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2188200Y (en) * | 1993-12-11 | 1995-01-25 | 赵润强 | Piezoelectric vibration pickup |
| CN101135658A (en) * | 2007-02-05 | 2008-03-05 | 曹林 | Method for recognizing water boiling point with piezo-effect vibration pickups, and sensor and circuit |
| CN102901557A (en) * | 2011-07-30 | 2013-01-30 | 重庆工商大学 | Isolation shear type piezoelectric acceleration transducer with internal integrated circuit |
-
2014
- 2014-05-14 CN CN201410204219.3A patent/CN103968938A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2188200Y (en) * | 1993-12-11 | 1995-01-25 | 赵润强 | Piezoelectric vibration pickup |
| CN101135658A (en) * | 2007-02-05 | 2008-03-05 | 曹林 | Method for recognizing water boiling point with piezo-effect vibration pickups, and sensor and circuit |
| CN102901557A (en) * | 2011-07-30 | 2013-01-30 | 重庆工商大学 | Isolation shear type piezoelectric acceleration transducer with internal integrated circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153181A (en) * | 2016-06-24 | 2016-11-23 | 济南大学 | A kind of piezoelectricity biomimetic sensor |
| CN108964517A (en) * | 2017-05-21 | 2018-12-07 | 天津大学（青岛）海洋工程研究院有限公司 | A kind of self-powered vibration frequency sensing system based on switched capacitor technique |
| CN109099970A (en) * | 2018-08-29 | 2018-12-28 | 广州市泺立能源科技有限公司 | High tower based on CORS technology monitors system |
| CN109099971A (en) * | 2018-08-29 | 2018-12-28 | 广州市泺立能源科技有限公司 | Power transmission tower remote supervision system based on CORS technology |
| CN108760028A (en) * | 2018-08-30 | 2018-11-06 | 深圳市刻锐智能科技有限公司 | Vibration alarm device |
| CN109085440A (en) * | 2018-09-25 | 2018-12-25 | 华南理工大学 | A kind of piezo electrical property automatic testing method |
| CN110686769A (en) * | 2019-10-31 | 2020-01-14 | 珠海格力电器股份有限公司 | Vibration detection device, washing machine and vibration detection and control method of washing machine |
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Application publication date: 20140806 |
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