CN212732869U - Energy conversion device based on piezoelectric ceramic piece - Google Patents
Energy conversion device based on piezoelectric ceramic piece Download PDFInfo
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- CN212732869U CN212732869U CN202021009249.6U CN202021009249U CN212732869U CN 212732869 U CN212732869 U CN 212732869U CN 202021009249 U CN202021009249 U CN 202021009249U CN 212732869 U CN212732869 U CN 212732869U
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Abstract
The utility model provides an energy conversion device based on piezoceramics piece, include: the device comprises a bolt, a rear cover plate, an energy converter, an amplitude transformer and a flange; the transducer is based on a piezoelectric ceramic piece; a rear cover plate is arranged at one end side of the transducer, and the other end of the transducer is fixedly connected with one end of the amplitude transformer; the bolt sequentially penetrates through and fixes the rear cover plate, the transducer and the amplitude transformer; the flange is arranged at the displacement node of the amplitude transformer. A transducer based on piezoceramics piece has characteristics such as voltage application requires low, the displacement is great, control is steady, convenient to use, but wide application in fields such as medical treatment.
Description
Technical Field
The utility model relates to an energy conversion technology field especially relates to an energy conversion equipment based on piezoceramics piece.
Background
With the development of the scientific and technological level and the improvement of the living standard of people, the minimally invasive medical treatment is more and more popular among doctors and patients due to the characteristics of small pain, small wound, tiny scars, less bleeding during operation, quick body recovery and the like caused by the minimally invasive medical treatment. In minimally invasive medical surgery, the use of an ultrasonic scalpel is extremely critical. The ultrasonic scalpel is often required to be positioned accurately and operated stably in the using process. However, in the actual use process, the operation of the ultrasonic scalpel is often influenced by objective environment, subjective factors of the medical practitioner, and the like.
At present, piezoelectric ceramic materials are widely used in the ultrasonic field due to their unique properties. For example, the piezoelectric ceramic plate itself will generate a small deformation under the action of an external voltage. If this deformation characteristic of the piezoelectric ceramic can be utilized, precise control of the minute displacement can be achieved. In practical applications, the applied voltage is positively correlated to the thickness of the piezoceramic wafer, and for a single-layer Athens ceramic wafer with a conventional thickness, the applied voltage usually needs 1.5 kV/mm. Therefore, the level of the external voltage of the piezoelectric ceramic plate is high. Therefore, if control of a large displacement amount is to be achieved, it is necessary to continue to increase the level of applied voltage, which imposes a large limitation on the use of piezoelectric ceramics.
Therefore, in the prior art, the transducer based on the piezoelectric ceramic plate has the problems of high voltage application requirement, difficulty in realizing large displacement, unstable control, inconvenience in use and the like.
Disclosure of Invention
In view of this, the main object of the present invention is to provide a piezoelectric ceramic plate-based transducer device with low voltage application requirement, capability of realizing large displacement, stable control and convenient use.
In order to achieve the above object, the utility model provides a technical scheme does:
a piezoceramic wafer-based transduction device, comprising: the device comprises a bolt (1), a rear cover plate (2), an energy converter (3), an amplitude transformer (4) and a flange (5); wherein, the transducer (3) is based on a piezoelectric ceramic piece;
a rear cover plate (2) is arranged at one side end of the transducer (3), and the other side end of the transducer (3) is fixedly connected with one side end of the amplitude transformer (4); the bolt (1) sequentially penetrates through and fixes the rear cover plate (2), the transducer (3) and the amplitude transformer (4); the flange (5) is arranged at the external displacement node of the amplitude transformer (4).
To sum up, an energy conversion device based on piezoceramics piece includes bolt, back shroud, based on the transducer of piezoceramics piece, amplitude transformer, flange. When the transducer based on the piezoelectric ceramic piece is connected with an external voltage, the transducer based on the piezoelectric ceramic piece generates vibration, the piezoelectric ceramic piece generates micro deformation, the micro deformation enables the transducer based on the piezoelectric ceramic piece to generate micro displacement, the amplitude transformer realizes vibration amplification and energy gathering of the micro displacement, and the amplified vibration and the gathered energy are conducted to surgical instruments, such as an ultrasonic scalpel and the like. Thus, the operator can realize larger displacement of the surgical instrument, and the surgical instrument is stably controlled and is more convenient to use.
Drawings
Fig. 1 is a schematic diagram of the overall composition structure of a transducer device based on a piezoelectric ceramic plate according to the present invention.
Fig. 2 is a schematic structural diagram of the piezoelectric ceramic piece-based transducer according to the embodiment of the present invention.
Fig. 3 is a schematic view of the structure of the horn of the present invention.
Fig. 4 is a schematic structural diagram of the rear cover plate of the present invention.
Fig. 5 is a schematic structural diagram of the bolt of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic diagram of the overall composition structure of a transducer device based on a piezoelectric ceramic plate according to the present invention. As shown in fig. 1, the utility model relates to a transducer based on piezoceramics piece, include: the device comprises a bolt 1, a rear cover plate 2, a transducer 3, an amplitude transformer 4 and a flange 5; wherein, the transducer 3 is based on piezoelectric ceramic plate;
one side end of the transducer 3 is provided with a rear cover plate 2, and the other side end of the transducer 3 is fixedly connected with one side end of the amplitude transformer 4; the bolt 1 sequentially penetrates through and fixes the rear cover plate 2, the transducer 3 and the amplitude transformer 4; a flange 5 is mounted at the displacement node outside the horn 4.
In the utility model, become 4 outside displacement nodes of amplitude transformer do the utility model transducer based on piezoceramics piece can install the installation position on other external equipment. In practical application, the displacement node positions of the amplitude transformer with different structures and different shapes are different. That is, for a specific horn, the position of its displacement node needs to be determined according to its own shape and structure. Further, become width of cloth pole displacement node, will energy conversion equipment based on piezoceramics piece installs on other external equipment, becomes the vibration of width of cloth pole self and the vibration of other external equipment self do not influence each other.
The utility model discloses in, bolt 1 is through 2 fixed transducers 3 of back shroud, become width of cloth pole 4, is in order to prevent that transducer 3 from receiving the direct extrusion of bolt 1 to guarantee that transducer 3's position is accurate. In addition, the direct exposure of the transducer 3 can achieve good heat dissipation to ensure normal conduction of vibration.
In practical application, the amplitude transformer 4 and the flange 5 can be of an integral structure or of a separate structure. When the amplitude transformer 4 and the flange 5 are of a separate structure, the flange 5 is sleeved at the displacement node outside the amplitude transformer 4.
In a word, the utility model relates to a transducer based on piezoceramics piece includes bolt, back shroud, based on the transducer, amplitude transformer, flange of piezoceramics piece. When the transducer based on the piezoelectric ceramic piece is connected with an external voltage, the transducer based on the piezoelectric ceramic piece generates vibration, the piezoelectric ceramic piece generates micro deformation, the micro deformation enables the transducer based on the piezoelectric ceramic piece to generate micro displacement, the amplitude transformer realizes vibration amplification and energy gathering of the micro displacement, and the amplified vibration and the gathered energy are conducted to surgical instruments, such as an ultrasonic scalpel and the like. Thus, the operator can realize larger displacement of the surgical instrument, and the surgical instrument is stably controlled and is more convenient to use.
Fig. 2 is a schematic structural diagram of the piezoelectric ceramic piece-based transducer according to the embodiment of the present invention. As shown in fig. 1 and 2, in the present invention, the transducer 3 includes: 2n piezoelectric ceramic plates 31 with central holes 7 and conductive slip rings 9; wherein, each piezoelectric ceramic piece 31 is stacked in a surface-to-surface stacking manner; the outer side of each piezoelectric ceramic piece 31 is provided with a conductive slip ring 9; each 2n-1 piezoelectric ceramic piece 31 is connected with one electrode of an external electric field through a respective conductive slip ring 9, and each 2n piezoelectric ceramic piece 31 is connected with the other electrode of the external electric field through a respective conductive slip ring 9; here, n is a natural number.
The utility model discloses in, 2n piezoceramics piece 31 piles up with the mode that face and face stacked, and the piezoceramics piece that the ordinal is the odd number all is connected to an electrode of outside electric field through leading the electrical slip ring, the piezoceramics piece that the ordinal is the even number all is connected to another electrode of outside electric field through leading the electrical slip ring, 2n piezoceramics piece 31 just becomes for comparatively complicated series-parallel circuit with the circuit that outside electric field is constituteed like this to it produces the required applied external voltage of small deformation to have reduced piezoceramics piece. In fact, by stacking the piezoelectric ceramic sheets in parallel with each other in series, the applied voltage required for the piezoelectric ceramic sheets can be reduced from 1.5 kv/mm to 150 v/mm. Compared with the prior art, transducer based on piezoceramics piece can reduce the requirement to applying voltage at to a great extent for piezoceramics piece can utilize widely more easily. Moreover, stacking and parallel connection of the piezoelectric ceramic pieces can also achieve space saving.
Fig. 3 is a schematic view of the structure of the horn of the present invention. As shown in fig. 1 and 3, the horn 4 of the present invention has a five-segment structure, and the outer diameter of the horn 4 generally tends to decrease gradually along the direction away from the transducer 3; the five sections of the amplitude transformer 4 are respectively: the connecting section, the first middle section, the second middle section, the transition section and the front section; wherein the content of the first and second substances,
one side end of the connecting section is used as one side end of the amplitude transformer 4 and is fixedly connected with the other side end of the energy converter 3; the other side end of the connecting section is fixedly connected with one side end of the first middle section, the other side end of the first middle section is fixedly connected with one side end of the second middle section, the other side end of the second middle section is fixedly connected with one side end of the transition section, the other side end of the transition section is fixedly connected with one side end of the front section, and the other side end of the front section is connected with a surgical instrument.
The connecting section is a flat horn-shaped structure, the outer diameter of the connecting section is gradually reduced along the direction gradually far away from the transducer 3, and the outer diameter of one side end of the connecting section is the same as that of the other side end of the transducer 3. The first middle section and the second middle section are both of a straight columnar structure, the outer diameter of the first middle section is smaller than that of the second middle section, and the outer diameter of the first middle section is the same as that of the other side end of the connecting section. The transition section is of a horn-shaped structure, and the outer diameter of the transition section is gradually reduced along the direction gradually far away from the transducer 3; the outer diameter of one side end of the transition section is the same as that of the other side end of the second middle section. The front section is of a straight column structure, and the outer diameter of one side end of the front section is the same as that of the other side end of the transition section.
The utility model discloses in, the above-mentioned special structural style that the amplitude transformer adopted can realize gathering, the amplification of amplitude bigger degree of energy bigger degree.
The utility model discloses in, right two arc edge lines of arbitrary axial cross-section of changeover portion are catenary, exponential shape line or conical line. In practical application, the amplitude transformer 4 with two arc-shaped edge lines of any axial section of the transition section being catenary, exponential-shaped line or conical line is correspondingly called catenary-type amplitude transformer, exponential-type amplitude transformer and conical amplitude transformer. A large number of experiments verify that: under the condition that the area coefficients are the same, the amplification coefficient of the catenary type amplitude transformer is the largest, the amplification coefficient of the exponential type amplitude transformer is the second, and the amplification coefficient of the conical type amplitude transformer is the smallest; under the condition of the same area coefficient, the shape factor influence of the conical horn is the largest, and the shape factor influence of the exponential horn is the second, and the shape factor influence of the catenary horn is the smallest. Further, the resonance amplitude of the exponential horn and the conical horn increases as the area coefficient increases. For the catenary horn, when the area coefficient is 1.01-1.81, the resonance amplitude of the catenary horn is increased along with the increase of the area coefficient; when the area coefficient of the suspension chain type amplitude transformer does not fall within the range of 1.01-1.81, the resonance amplitude of the suspension chain type amplitude transformer is reduced along with the increase of the area coefficient. Under the condition of no load, the amplification factor and the input impedance characteristic of the catenary type amplitude transformer are correspondingly superior to those of the exponential type amplitude transformer.
In practical application, the outer diameter of one side end of the connecting section is the same as the outer diameter of the other side end of the transducer 3, so that the transducer 3 can be prevented from being damaged by external force due to protrusion.
In practical applications, the five-segment structure of the horn 4 may be fabricated as a unitary structure or as separate structures. When the five sections of the amplitude transformer 4 are discrete structures, the amplitude transformer 4 is formed by fixedly connecting a connecting section, a first middle section, a second middle section, a transition section and a front section in sequence.
Fig. 4 is a schematic structural diagram of the rear cover plate of the present invention. Fig. 5 is a schematic structural diagram of the bolt of the present invention. As shown in fig. 4 and 5, in the present invention, the whole rear cover plate 2 is a cylindrical structure with a central hole; the bolt 1 comprises a positioning post 8.
Examples
In this embodiment, the transducer device based on the piezoelectric ceramic plate includes: the device comprises a bolt, a rear cover plate, an energy converter, an amplitude transformer and a flange; the transducer is based on piezoelectric ceramic plates, and comprises 4 piezoelectric ceramic plates stacked in a surface-to-surface manner, as shown in fig. 2.
In this embodiment, the amplitude transformer and the flange are of a discrete structure, and the flange is sleeved at the external displacement node of the amplitude transformer. Here, the displacement node is the junction of the second intermediate segment and the transition segment, as shown in fig. 1.
In this embodiment, the 1 st piezoceramic wafer and the 3 rd piezoceramic wafer are connected to the positive electrode of the external voltage source through respective conductive slip rings, and the 2 nd piezoceramic wafer and the 4 th piezoceramic wafer are connected to the negative electrode of the external voltage source through respective conductive slip rings.
In this embodiment, the horn is a catenary horn, an exponential horn, or a conical horn.
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A transduction device based on a piezoelectric ceramic plate, characterized in that the transduction device comprises: the device comprises a bolt (1), a rear cover plate (2), an energy converter (3), an amplitude transformer (4) and a flange (5); wherein, the transducer (3) is based on a piezoelectric ceramic piece;
a rear cover plate (2) is arranged at one side end of the transducer (3), and the other side end of the transducer (3) is fixedly connected with one side end of the amplitude transformer (4); the bolt (1) sequentially penetrates through and fixes the rear cover plate (2), the transducer (3) and the amplitude transformer (4); the flange (5) is arranged at the external displacement node of the amplitude transformer (4).
2. The piezoceramic wafer-based transduction device according to claim 1, characterized in that the transducer (3) comprises: 2n piezoelectric ceramic plates (31) with center holes (7) and conductive slip rings (9); wherein, each piezoelectric ceramic piece (31) is stacked in a surface-to-surface stacking manner; the outer side of each piezoelectric ceramic piece (31) is provided with a conductive slip ring (9); each 2n-1 piezoelectric ceramic piece (31) is connected with one electrode of an external electric field through a respective conductive slip ring (9), and each 2n piezoelectric ceramic piece (31) is connected with the other electrode of the external electric field through a respective conductive slip ring (9); here, n is a natural number.
3. The piezoceramic wafer-based transduction device according to claim 1, characterized in that the back cover plate (2) is entirely of cylindrical structure with a central hole.
4. The piezoceramic wafer-based transduction device according to claim 1 or 2, characterized in that the horn (4) is of a five-segment structure and the outer diameter of the horn (4) generally has a decreasing trend in the direction gradually away from the transducer (3); the five sections of the amplitude transformer (4) are respectively as follows: the connecting section, the first middle section, the second middle section, the transition section and the front section; wherein the content of the first and second substances,
one side end of the connecting section is used as one side end of the amplitude transformer (4) and is fixedly connected with the other side end of the energy converter (3); the other side end of the connecting section is fixedly connected with one side end of the first middle section, the other side end of the first middle section is fixedly connected with one side end of the second middle section, the other side end of the second middle section is fixedly connected with one side end of the transition section, the other side end of the transition section is fixedly connected with one side end of the front section, and the other side end of the front section is connected with a surgical instrument;
the connecting section is of a flat horn-shaped structure, the outer diameter of the connecting section is gradually reduced along the direction away from the transducer (3), and the outer diameter of one side end of the connecting section is the same as that of the other side end of the transducer (3);
the first middle section and the second middle section are both in a straight columnar structure, the outer diameter of the first middle section is smaller than that of the second middle section, and the outer diameter of the first middle section is the same as that of the other side end of the connecting section;
the transition section is of a horn-shaped structure, and the outer diameter of the transition section is gradually reduced along the direction which is gradually far away from the transducer (3); the outer diameter of one side end of the transition section is the same as that of the other side end of the second middle section;
the front section is of a straight column structure, and the outer diameter of one side end of the front section is the same as that of the other side end of the transition section.
5. The piezoceramic wafer-based transduction device according to claim 4, characterized in that the two arc-shaped edge lines for any axial cross section of the transition section are catenary, exponential or conical lines.
6. The piezoceramic wafer-based transduction device according to claim 4, characterized in that the five-segment structure of the horn (4) is a one-piece structure.
7. The piezoceramic wafer-based transduction device according to claim 4, characterized in that the five-segment structure of the horn (4) is a discrete structure with each segment, and the horn (4) is composed of a connecting segment, a first middle segment, a second middle segment, a transition segment and a front segment which are fixedly connected in sequence.
8. The piezoceramic wafer-based transduction device according to claim 1, characterized in that the horn (4) is of one-piece construction with the flange (5).
9. The piezoceramic wafer-based transduction device according to claim 1, characterized in that the horn (4) and the flange (5) are separate structures, and the flange (5) is sleeved at the displacement node outside the horn (4).
10. The piezoceramic wafer-based transduction device according to claim 1 or 9, characterized in that the external displacement node of the horn (4) is the junction of the second intermediate section with the transition section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021009249.6U CN212732869U (en) | 2020-05-28 | 2020-05-28 | Energy conversion device based on piezoelectric ceramic piece |
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| CN202021009249.6U CN212732869U (en) | 2020-05-28 | 2020-05-28 | Energy conversion device based on piezoelectric ceramic piece |
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| CN212732869U true CN212732869U (en) | 2021-03-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115008508A (en) * | 2022-06-06 | 2022-09-06 | 集美大学 | Ultrasonic cutting knife |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115008508A (en) * | 2022-06-06 | 2022-09-06 | 集美大学 | Ultrasonic cutting knife |
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