CN104467521A - Double-oscillator standing wave ultrasonic motor and excitation method thereof - Google Patents
Double-oscillator standing wave ultrasonic motor and excitation method thereof Download PDFInfo
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- CN104467521A CN104467521A CN201410757587.0A CN201410757587A CN104467521A CN 104467521 A CN104467521 A CN 104467521A CN 201410757587 A CN201410757587 A CN 201410757587A CN 104467521 A CN104467521 A CN 104467521A
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Abstract
The invention discloses a double-oscillator standing wave ultrasonic motor and an excitation method of the double-oscillator standing wave ultrasonic motor, and belongs to the technical field of ultrasonic motors. The double-oscillator standing wave ultrasonic motor comprises a first T-shaped frame, a second T-shaped frame, an arched beam structure and two rod-shaped sandwiched structure piezoelectric transducers. Balancing weights of the two rod-shaped sandwiched structure piezoelectric transducers are fixedly connected through the first T-shaped frame and the second T-shaped frame, and the arched beam structure is arranged between excitation sources of the rod-shaped sandwiched structure piezoelectric transducers. A first protrusion is arranged in the middle of the top end of the arched beam structure to form a driving foot, an A-phase voltage excitation signal and a B-phase voltage excitation signal are exerted on the two rod-shaped sandwiched structure piezoelectric transducers respectively, the A-phase voltage excitation signal is exerted on the two excitation sources which one screw penetrates through, and the B-phase voltage excitation signal is exerted on the other two excitation sources which the other screw penetrates through. The piezoelectric ceramic sandwiched structure arrangement can obtain a high mechanical quality factor, the two transducers work in the same first-order flexural oscillation mode, symmetry is good, a basic-order mode is easy to excite, and efficiency is high.
Description
Technical field
The present invention relates to a kind of ultrasound electric machine and electric excitation method thereof thereof, belong to Ultrasonic Motor Techniques field.
Background technology
Ten thousand bright PZT (piezoelectric transducer)s are widely used in ultrasonic device, such as, and positioner, micro-control system, robot etc.Ten thousand bright PZT (piezoelectric transducer)s are made up of piezoelectric ceramic, metal weights and pre-loading screw, there is high mechanical quality factor, Low ESR and be easy to clamp feature.
When applying frequency and be the alternating electric field of transducer resonant frequencies in piezoelectric ceramic, ten thousand bright PZT (piezoelectric transducer)s are by the d of piezoelectric ceramic
33effect inspires longitudinal vibration.Due to the piezoelectric constant d of barium titanate piezoelectric ceramics
33be greater than d
31, utilize d
33the piezoelectric actuator Billy d of effect
31the piezoelectric actuator of effect has higher efficiency.Under the prestressing force effect that pre-loading screw applies, under being in action of compressive stress all the time during piezoelectric ceramic work, therefore, the sound conduction of transducer assemblies is more efficient, improves mechanical quality factor simultaneously.This makes Langevin transducer be applicable to the demand of large power supersonic device.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides that a kind of structure is simple, big thrust loading, high accuracy, two vibrator standing wave ultrasound electric machine of fast-response and motivational techniques thereof.
For achieving the above object, the technical solution used in the present invention is: a kind of two vibrator standing wave ultrasound electric machine, comprises first, second T-shaped frame, arched girder structure and two shaft-like sandwich structure PZT (piezoelectric transducer)s; The balancing weight of described two shaft-like sandwich structure PZT (piezoelectric transducer) phase the same sides is fixedly connected with by the first T-shaped frame, and the balancing weight of opposite side is by being fixedly connected with by the second T-shaped frame, the bottom end of described arched girder structure is arranged between the exciting source of one of them shaft-like sandwich structure PZT (piezoelectric transducer), the other end is arranged between the exciting source of another shaft-like sandwich structure PZT (piezoelectric transducer), and the top middle portion of described arched girder structure is provided with the first projection and forms driving foot simultaneously.
Preferred: described shaft-like sandwich structure PZT (piezoelectric transducer) comprises first, second balancing weight, screw and two groups of exciting sources, described two groups of exciting sources are respectively first, second exciting source; It is foursquare cuboid that first, second balancing weight is a relative face, described first balancing weight offers unthreaded hole at the center of foursquare one side, and the surface that the first balancing weight is provided with unthreaded hole is provided with and first groove of parallel T-shaped frame upper end vertical along unthreaded hole diameter, and the second balancing weight offers screwed hole at the center of foursquare one side, the surface that described second balancing weight is provided with screwed hole is provided with vertical and the second groove of parallel T-shaped frame upper end of threadingly bore dia; Described piezoelectric ceramic is ring-type, and its internal diameter is identical with unthreaded hole diameter; Described electrode slice is soft conducting metal, has identical circular profile with piezoelectric ceramic, and is equipped with the second projection outside, for connecting energising lead-in wire; In first groove of one end shaft-like sandwich structure PZT (piezoelectric transducer) disposed therein of described first T-shaped frame, the other end is arranged in the first groove of another shaft-like sandwich structure PZT (piezoelectric transducer); In second groove of one end shaft-like sandwich structure PZT (piezoelectric transducer) disposed therein of described second T-shaped frame, the other end is arranged in the second groove of another shaft-like sandwich structure PZT (piezoelectric transducer); The bottom end of described arched girder structure is arranged between first, second exciting source of one of them shaft-like sandwich structure PZT (piezoelectric transducer), and the other end is arranged between first, second exciting source of another shaft-like sandwich structure PZT (piezoelectric transducer); The dead in line of the unthreaded hole on the central axis of first, second exciting source on described same shaft-like sandwich structure PZT (piezoelectric transducer) and this transducer; The dead in line of the screwed hole on the central axis of first, second exciting source on described same shaft-like sandwich structure PZT (piezoelectric transducer) and this transducer; Screw on one of them shaft-like sandwich structure PZT (piezoelectric transducer) runs through one end of the first balancing weight on this transducer, one end of the first T-shaped frame, the first exciting source, arched girder structural base successively, and one end of the second exciting source, the second T-shaped frame also screws in the screwed hole on the second balancing weight; And the screw on another shaft-like sandwich structure PZT (piezoelectric transducer) runs through the other end of the first balancing weight on this transducer, the other end of the first T-shaped frame, the first exciting source, arched girder structural base successively, the other end of the second exciting source, the second T-shaped frame also screws in the screwed hole on the second balancing weight.
Preferred: often organize exciting source and be made up of 5 plate electrode sheets and 4 piezoelectric ceramic, the polarised direction of piezoelectric ceramic is relative between two.
Preferred: in the middle part of arched girder structure, the vibration of the first projection causes the rotor turns or mover translation that contact with it.
The motivational techniques of a kind of pair of vibrator standing wave ultrasound electric machine, electrode slice on four groups of exciting sources connects wire respectively, often organize the electrode slice of both sides and centre in exciting source through wired earth, all the other two panels electrode slices apply identical voltage excitation signals, described voltage excitation signals is divided into A, B two-phase, two groups of exciting sources that wherein screw runs through apply A phases, and two groups of exciting sources that another root screw runs through apply B phases; Described A, B two-phase voltage excitation signals is all the same sine voltage signal frequently of constant amplitude, and two phase voltage signals have the phase difference of pi/2.
Preferred: two shaft-like sandwich structure PZT (piezoelectric transducer)s under the excitation of A, B two-phase voltage excitation signals, the first projection generation elliptic vibrations in the middle part of arched girder structure.
Provided by the invention pair of vibrator standing wave ultrasound electric machine and motivational techniques thereof, compared to existing technology, there is following beneficial effect: piezoelectric ceramic sandwich structure is arranged can obtain comparatively high mechanical quality factor, two transducers are all operated in identical single order bending vibration modes, symmetry is good, fundamental mode is easy to excitation, and efficiency is high, therefore structure of the present invention simple, big thrust loading, high accuracy, fast-response.
Accompanying drawing explanation
The two vibrator standing wave ultrasound electric machine structure of Fig. 1;
The two vibrator standing wave ultrasound electric machine energisation mode of Fig. 2;
Fig. 3 operating state vibration schematic diagram;
Fig. 4 drives rotor turns to drive schematic diagram;
Fig. 5 drives mover linear movement output schematic diagram;
Wherein, 1-PZT (piezoelectric transducer); 2-arched girder structure; 3-T shape frame; 4-rotor; 5-stator.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of two vibrator standing wave ultrasound electric machine, as shown in Figure 1, comprises first, second T-shaped frame, arched girder structure and two shaft-like sandwich structure PZT (piezoelectric transducer)s; The balancing weight of described two shaft-like sandwich structure PZT (piezoelectric transducer) phase the same sides is fixedly connected with by the first T-shaped frame, and the balancing weight of opposite side is by being fixedly connected with by the second T-shaped frame, the bottom end of described arched girder structure is arranged between the exciting source of one of them shaft-like sandwich structure PZT (piezoelectric transducer), the other end is arranged between the exciting source of another shaft-like sandwich structure PZT (piezoelectric transducer), and the top middle portion of described arched girder structure is provided with the first projection and forms driving foot simultaneously.
Described shaft-like sandwich structure PZT (piezoelectric transducer) comprises first, second balancing weight, screw and two groups of exciting sources, and described two groups of exciting sources are respectively first, second exciting source; It is foursquare cuboid that first, second balancing weight is a relative face, described first balancing weight offers unthreaded hole at the center of foursquare one side, and the surface that the first balancing weight is provided with unthreaded hole is provided with and first groove of parallel T-shaped frame upper end vertical along unthreaded hole diameter, and the second balancing weight offers screwed hole at the center of foursquare one side, the surface that described second balancing weight is provided with screwed hole is provided with vertical and the second groove of parallel T-shaped frame upper end of threadingly bore dia; Described piezoelectric ceramic is ring-type, and its internal diameter is identical with unthreaded hole diameter; Described electrode slice is soft conducting metal, has identical circular profile with piezoelectric ceramic, and is equipped with the second projection outside, for connecting energising lead-in wire; In first groove of one end shaft-like sandwich structure PZT (piezoelectric transducer) disposed therein of described first T-shaped frame, the other end is arranged in the first groove of another shaft-like sandwich structure PZT (piezoelectric transducer); In second groove of one end shaft-like sandwich structure PZT (piezoelectric transducer) disposed therein of described second T-shaped frame, the other end is arranged in the second groove of another shaft-like sandwich structure PZT (piezoelectric transducer); The bottom end of described arched girder structure is arranged between first, second exciting source of one of them shaft-like sandwich structure PZT (piezoelectric transducer), and the other end is arranged between first, second exciting source of another shaft-like sandwich structure PZT (piezoelectric transducer); The dead in line of the unthreaded hole on the central axis of first, second exciting source on described same shaft-like sandwich structure PZT (piezoelectric transducer) and this transducer; The dead in line of the screwed hole on the central axis of first, second exciting source on described same shaft-like sandwich structure PZT (piezoelectric transducer) and this transducer; Screw on one of them shaft-like sandwich structure PZT (piezoelectric transducer) runs through one end of the first balancing weight on this transducer, one end of the first T-shaped frame, the first exciting source, arched girder structural base successively, and one end of the second exciting source, the second T-shaped frame also screws in the screwed hole on the second balancing weight; And the screw on another shaft-like sandwich structure PZT (piezoelectric transducer) runs through the other end of the first balancing weight on this transducer, the other end of the first T-shaped frame, the first exciting source, arched girder structural base successively, the other end of the second exciting source, the second T-shaped frame also screws in the screwed hole on the second balancing weight.
Often organize exciting source to be made up of 5 plate electrode sheets and 4 piezoelectric ceramic, the polarised direction of piezoelectric ceramic is relative between two.
In the middle part of arched girder structure, the vibration of the first projection causes the rotor turns or mover translation that contact with it.
The motivational techniques of a kind of pair of vibrator standing wave ultrasound electric machine, electrode slice on four groups of exciting sources connects wire respectively, often organize the electrode slice of both sides and centre in exciting source through wired earth, all the other two panels electrode slices apply identical voltage excitation signals, described voltage excitation signals is divided into A, B two-phase, two groups of exciting sources that wherein screw runs through apply A phases, and two groups of exciting sources that another root screw runs through apply B phases; Described A, B two-phase voltage excitation signals is all the same sine voltage signal frequently of constant amplitude, and two phase voltage signals have the phase difference of pi/2.
Two shaft-like sandwich structure PZT (piezoelectric transducer)s under the excitation of A, B two-phase voltage excitation signals, the first projection generation elliptic vibrations in the middle part of arched girder structure.
In order to better the present invention is described, now provide the example and being described.
Two vibrator standing wave ultrasound electric machine, as Fig. 1, is made up of two shaft-like sandwich structure PZT (piezoelectric transducer)s (1), T-shaped frame (2) and arched girder structures (3); Two shaft-like sandwich structure PZT (piezoelectric transducer)s (1) are arranged in juxtaposition, and centre links into an integrated entity through arched girder structure (2) and T-shaped frame (3), and be provided with projection in the middle part of domes, T-shaped chord position is arranged in arched girder structure bilateral symmetry.
The energisation mode of two vibrator standing wave ultrasound electric machine is as Fig. 2: apply A, B two-phase voltage excitation signals respectively at two shaft-like sandwich structure PZT (piezoelectric transducer)s.Described A, B two-phase voltage excitation signals is all the same sine voltage signal frequently of constant amplitude, and two phase voltage signals have the phase difference of pi/2.Two shaft-like sandwich structure PZT (piezoelectric transducer)s under the excitation of A, B two-phase voltage excitation signals, the projection generation elliptic vibrations in the middle part of arched girder structure.
PZT (piezoelectric transducer) is made up of counterweight, arched girder structure, screw, piezoelectric ceramic and electrode slice.Counterweight has two groups, and be respectively two band through hole cubes and link into an integrated entity through T-shaped frame, be provided with the cube face of two through holes for square, through hole is positioned at center, and T-shaped frame place plane establishes through-hole surfaces parallel with cube; In described two set of weights, set through hole one group is screwed hole, and another group is unthreaded hole; Described T-shaped frame both sides are connected with cube, and bottom has two installing holes; Described cube be provided with through hole one of them be provided with on the surface along through-hole diameter and the groove of parallel T-shaped frame upper end.Drive foot to connect two cubes composition for domes, domes top is provided with projection, and two cubes are identical with the cube in counterweight, is also all provided with through hole and apertured surface is square.Piezoelectric ceramic is ring-type, and its diameter is identical with the square length of side cubical in counterweight, and internal diameter is identical with the through hole on square surface.Electrode slice is soft conducting metal, has identical circular profile, and be equipped with projection outside with piezoelectric ceramic, for connecting energising lead-in wire.16 piezoelectric ceramic and 20 plate electrode sheets form 4 groups of identical exciting sources, often organize exciting source and are made up of 5 plate electrode sheets and 4 piezoelectric ceramic, and the polarised direction of potsherd is relative between two, and electrode slice lays respectively on potsherd two anchor rings and the center of circle and overlaps.Four groups of exciting sources are positioned at two the cube both sides driving foot between two, and piezoelectric ceramic and electrode slice are combined into the dead in line of unthreaded hole on the central axis of exciting source and cube, two counterweights lay respectively at outside four groups of exciting sources, and through hole and four groups of exciting source central axes in counterweight, two screws run through the unthreaded hole in counterweight, four groups of upper unthreaded holes of exciting source centre-driven foot screw in the screwed hole in two 1 set of weights respectively, two groups of T-shaped frame alignment and to be provided with the side of installing hole relative with driving side, sufficient arch upper process place.
As Fig. 2, electrode slice on described four groups of exciting sources connects wire respectively, often organize the electrode slice of both sides and centre in exciting source through wired earth, all the other two panels electrode slices apply identical voltage excitation signals, described voltage excitation signals is divided into A, B two-phase, two groups of exciting sources that wherein screw runs through apply A phases, and two groups of exciting sources that another root screw runs through apply B phases.Described A, B two-phase voltage excitation signals is all the same sine voltage signal frequently of constant amplitude, and two phase voltage signals have the phase difference of pi/2.
Apply voltage drive to four groups of piezoelectric units by Fig. 2 mode, this projection with elliptic vibrations, as Fig. 3, will be defeated at another body surface with certain, will produce unidirectional frictional force by the projection in the middle part of domes.
A mode of operation for pair vibrator standing wave ultrasound electric machine, two shaft-like sandwich structure PZT (piezoelectric transducer)s under the excitation of A, B two-phase voltage excitation signals, the projection generation elliptic vibrations in the middle part of domes.
As Fig. 4, the rotor (4) contacted with it is caused to rotate by the vibration of described domes central protrusion.
As Fig. 5, caused mover (5) translation contacted with it by the vibration of described domes central protrusion.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a two vibrator standing wave ultrasound electric machine, is characterized in that: comprise first, second T-shaped frame, arched girder structure and two shaft-like sandwich structure PZT (piezoelectric transducer)s; The balancing weight of described two shaft-like sandwich structure PZT (piezoelectric transducer) phase the same sides is fixedly connected with by the first T-shaped frame, and the balancing weight of opposite side is by being fixedly connected with by the second T-shaped frame, the bottom end of described arched girder structure is arranged between the exciting source of one of them shaft-like sandwich structure PZT (piezoelectric transducer), the other end is arranged between the exciting source of another shaft-like sandwich structure PZT (piezoelectric transducer), and the top middle portion of described arched girder structure is provided with the first projection and forms driving foot simultaneously.
2. according to claim 1 pair of vibrator standing wave ultrasound electric machine, is characterized in that: described shaft-like sandwich structure PZT (piezoelectric transducer) comprises first, second balancing weight, screw and two groups of exciting sources, and described two groups of exciting sources are respectively first, second exciting source; It is foursquare cuboid that first, second balancing weight is a relative face, described first balancing weight offers unthreaded hole at the center of foursquare one side, and the surface that the first balancing weight is provided with unthreaded hole is provided with and first groove of parallel T-shaped frame upper end vertical along unthreaded hole diameter, and the second balancing weight offers screwed hole at the center of foursquare one side, the surface that described second balancing weight is provided with screwed hole is provided with vertical and the second groove of parallel T-shaped frame upper end of threadingly bore dia; Described piezoelectric ceramic is ring-type, and its internal diameter is identical with unthreaded hole diameter; Described electrode slice is soft conducting metal, has identical circular profile with piezoelectric ceramic, and is equipped with the second projection outside, for connecting energising lead-in wire; In first groove of one end shaft-like sandwich structure PZT (piezoelectric transducer) disposed therein of described first T-shaped frame, the other end is arranged in the first groove of another shaft-like sandwich structure PZT (piezoelectric transducer); In second groove of one end shaft-like sandwich structure PZT (piezoelectric transducer) disposed therein of described second T-shaped frame, the other end is arranged in the second groove of another shaft-like sandwich structure PZT (piezoelectric transducer); The bottom end of described arched girder structure is arranged between first, second exciting source of one of them shaft-like sandwich structure PZT (piezoelectric transducer), and the other end is arranged between first, second exciting source of another shaft-like sandwich structure PZT (piezoelectric transducer); The dead in line of the unthreaded hole on the central axis of first, second exciting source on described same shaft-like sandwich structure PZT (piezoelectric transducer) and this transducer; The dead in line of the screwed hole on the central axis of first, second exciting source on described same shaft-like sandwich structure PZT (piezoelectric transducer) and this transducer; Screw on one of them shaft-like sandwich structure PZT (piezoelectric transducer) runs through one end of the first balancing weight on this transducer, one end of the first T-shaped frame, the first exciting source, arched girder structural base successively, and one end of the second exciting source, the second T-shaped frame also screws in the screwed hole on the second balancing weight; And the screw on another shaft-like sandwich structure PZT (piezoelectric transducer) runs through the other end of the first balancing weight on this transducer, the other end of the first T-shaped frame, the first exciting source, arched girder structural base successively, the other end of the second exciting source, the second T-shaped frame also screws in the screwed hole on the second balancing weight.
3. according to claim 2 pair of vibrator standing wave ultrasound electric machine, is characterized in that: often organize exciting source and be made up of 5 plate electrode sheets and 4 piezoelectric ceramic, the polarised direction of piezoelectric ceramic is relative between two.
4. according to claim 3 pair of vibrator standing wave ultrasound electric machine, is characterized in that: in the middle part of arched girder structure, the vibration of the first projection causes the rotor turns or mover translation that contact with it.
5. the motivational techniques of a two vibrator standing wave ultrasound electric machine as claimed in claim 1, it is characterized in that: the electrode slice on four groups of exciting sources connects wire respectively, often organize the electrode slice of both sides and centre in exciting source through wired earth, all the other two panels electrode slices apply identical voltage excitation signals, described voltage excitation signals is divided into A, B two-phase, two groups of exciting sources that wherein screw runs through apply A phases, and two groups of exciting sources that another root screw runs through apply B phases; Described A, B two-phase voltage excitation signals is all the same sine voltage signal frequently of constant amplitude, and two phase voltage signals have the phase difference of pi/2.
6. the motivational techniques of according to claim 5 pair of vibrator standing wave ultrasound electric machine, it is characterized in that: two shaft-like sandwich structure PZT (piezoelectric transducer)s under the excitation of A, B two-phase voltage excitation signals, the first projection generation elliptic vibrations in the middle part of arched girder structure.
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| CN105406759A (en) * | 2016-01-08 | 2016-03-16 | 哈尔滨工业大学 | Partition exciting longitudinal and bending composite ultrasonic motor vibrator |
| CN106741773A (en) * | 2016-12-01 | 2017-05-31 | 南京航空航天大学 | A kind of bionical tadpole of sandwich Piezoelectric Driving and its working method |
| CN108880319A (en) * | 2018-04-28 | 2018-11-23 | 淮海工学院 | Indulge curved composite vibrational mode increasing material manufacturing ultrasonic vibrator |
| CN114900069A (en) * | 2022-06-10 | 2022-08-12 | 山东理工大学 | Ultrasonic motor stator comprehensively applying d31 deformation |
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