CN110732477A - spiral sound wave transmitting transducer containing vibration-transmitting rod - Google Patents
spiral sound wave transmitting transducer containing vibration-transmitting rod Download PDFInfo
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- CN110732477A CN110732477A CN201911023253.XA CN201911023253A CN110732477A CN 110732477 A CN110732477 A CN 110732477A CN 201911023253 A CN201911023253 A CN 201911023253A CN 110732477 A CN110732477 A CN 110732477A
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- 239000000919 ceramic Substances 0.000 claims abstract description 78
- 239000002184 metal Substances 0.000 claims abstract description 68
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims abstract description 54
- 230000010287 polarization Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000010030 laminating Methods 0.000 abstract 1
- 230000005855 radiation Effects 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
- B06B2201/74—Underwater
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention provides spiral sound wave transmitting transducers with vibration transmission rods, which comprise vibration transmission rods, piezoelectric ceramic stacks and metal mass blocks, wherein the vibration transmission rods are arranged in the centers of metal shells, the upper ends and the lower ends of the vibration transmission rods are fixedly connected with the metal shells, a plurality of groups of piezoelectric ceramic stacks are uniformly distributed on the peripheries of the vibration transmission rods, the metal mass blocks are sleeved on the peripheries of the piezoelectric ceramic stacks, each piezoelectric ceramic stack comprises a plurality of piezoelectric ceramic pieces and electrode plates, the piezoelectric ceramic stacks are formed by laminating the piezoelectric ceramic pieces and the electrode plates in a staggered mode, and the two ends of each piezoelectric ceramic stack are respectively provided with the piezoelectric ceramic pieces.
Description
Technical Field
The invention belongs to the field of underwater acoustic transducers, and particularly relates to spiral acoustic wave transmitting transducers with vibration transmission rods.
Background
The underwater navigation positioning usually adopts sound waves as a medium for carrying information, and an underwater sound transducer is used as equipment for generating the sound waves underwater, and related application technology needs to be improved according to the requirements of times.
In recent years, the rapid development of small-size underwater vehicles puts forward the demands for miniaturization and simplification of underwater navigation equipment, and the American Benjamin Dzikowicz simulates the VOR technology in radio navigation and puts forward a new underwater sound navigation technology, and the phase directivity of spiral sound waves is utilized to realize the navigation function, so that the equipment burden of the underwater vehicle is reduced.
Although the spiral sound wave transducers can emit sound waves with phase directivity, the linearity of the phase directivity of the transducers is often poor, the problems that the phase directivities change along with the height exist, extra errors are added to navigation, that the transducers are too complex in driving mode and cannot meet the requirements of actual spiral sound wave navigation, how to achieve the emission of the spiral sound waves is achieved, the linearity of the phase directivity is high, the phase characteristics do not change along with the height, and the driving is simple, so that the spiral sound wave acoustic navigation system becomes a problem of people concerned at present.
Disclosure of Invention
In view of the above, the present invention is directed to spiral sound wave transmitting transducers with vibration rods, which have simple driving method, high linearity of phase directivity, no variation of phase characteristics with height, and low resonant frequency.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
spiral sound wave transmitting transducer containing vibration transmission rod, including vibration transmission rod, piezoceramics heap and the metal quality piece of setting in the metal casing, the vibration transmission rod set up in metal casing's center department, and vibration transmission rod's upper and lower end all links firmly with metal casing, at vibration transmission rod's a plurality of groups piezoceramics heap of equipartition all around, the metal quality piece cover establish the periphery at piezoceramics heap, every piezoceramics heap all include a plurality of piezoceramics pieces and electrode slice, piezoceramics heap form by the crisscross pressfitting of piezoceramics piece and electrode slice, and piezoceramics heap's both ends are piezoceramics piece.
the step further, the metal casing includes upper cover, lower cover and middle section pipe, upper cover and lower cover be the plectane that the center is thick, the edge is thin, the middle section pipe be the isopachous pipe, upper cover and lower cover and middle section pipe external diameter equal, upper cover and lower cover and the coaxial setting of middle section pipe and fixed connection.
And , the upper cover and the lower cover are completely the same in shape, and both the surface close to the vibration transmission rod is a plane, and the surface is a curved circular plate.
Step , the vibration transmission rod is a variable cross-section solid metal rod which is symmetrical up and down, the cross section of the middle section of the vibration transmission rod is square, the cross sections of the upper section and the lower section are circular, the length of the vibration transmission rod is equal to the height of the middle section round tube of the metal shell, the two ends of the vibration transmission rod are fixedly connected with the upper cover of the metal shell and the inner surface of the lower cover, and the vibration transmission rod is coaxially arranged with the upper cover and the lower cover.
And , arranging 4 groups of piezoelectric ceramic piles around the middle section of the vibration transmission rod in the circumferential direction, wherein the central axes of the two adjacent groups of piezoelectric ceramic piles are perpendicular to each other and penetrate through the geometric center of the vibration transmission rod.
, each group of piezoelectric ceramic stacks are of a cuboid structure formed by bonding 2n piezoelectric ceramic pieces, the 2n piezoelectric ceramic pieces are polarized along the thickness direction, the polarization directions of every two adjacent piezoelectric ceramic pieces are opposite, and n is a positive integer.
, the metal mass block is a metal cylinder with an octagonal through hole in the center, a gap is arranged between the metal mass block and the metal shell, the octagonal through hole of the metal mass block is matched with the piezoelectric ceramic stacks, and the metal mass block is fixedly connected with the piezoelectric ceramic stacks.
And , all the electrode plates are provided with lead connecting holes, and when the number of the piezoelectric ceramic plates in each group of piezoelectric ceramic stacks is more than or equal to 4, the lead connecting holes of two adjacent electrode plates are arranged in a staggered mode.
Compared with the prior art, the spiral sound wave transmitting transducers with the vibration transmission rods have the following advantages:
the spiral sound wave transmitting transducer containing vibration-transmitting rod of the invention,
1. utilize the circular pendulum vibration transmission spiral sound wave of transducer shell, the transducer casing has the axial symmetry, and other structure are whole to have the characteristics that are similar to the axial symmetry, have improved nature that the casing all directions vibrate, have improved the directional linearity of phase place of the spiral sound wave that the transducer transmitted.
2. The vibration generated by the piezoelectric ceramic stack is firstly transmitted to the vibration transmission rod in a concentrated manner and then transmitted to the radiation surface of the shell through the vibration transmission rod, so that the high-order vibration component of the shell can be greatly reduced, the proportion of 1-order spiral sound waves in sound radiation components of the transducer is improved, and the emitted spiral sound waves have high-linearity horizontal phase directivity;
3. the structure containing the vibration transmission rod reduces the integral equivalent rigidity of the transducer, causes the reduction of the working frequency of the transducer and ensures that the phase characteristics of the transmitted sound waves do not change along with the height.
Drawings
The accompanying drawings, which form a part hereof , are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, an illustrative embodiment of the invention and the description of the invention for purposes of explanation and not limitation, of the invention, wherein:
FIG. 1 is a schematic structural diagram of spiral sound wave transmitting transducers with vibration rods according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating an assembly relationship between a piezo ceramic stack and a vibration rod according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a vibration rod;
fig. 4 is a schematic structural view of the electrode sheet.
Description of reference numerals:
1-metal shell, 2-vibration transmission rod, 3-piezoelectric ceramic stack, 4-electrode plate, 5-piezoelectric ceramic plate, 6-metal mass block and 7-wire hole.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-4, spiral sound wave transmitting transducers with vibration transmission rods comprise vibration transmission rods 2, piezoelectric ceramic stacks 3 and metal mass blocks 6 arranged in a metal shell 1, wherein the vibration transmission rods 2 are arranged at the center of the metal shell 1, the upper and lower ends of the vibration transmission rods 2 are fixedly connected with the metal shell 1, a plurality of groups of piezoelectric ceramic stacks 3 are uniformly distributed around the vibration transmission rods 2, the metal mass blocks 6 are sleeved on the periphery of the piezoelectric ceramic stacks 3, each of the piezoelectric ceramic stacks 3 comprises a plurality of piezoelectric ceramic plates 4 and electrode plates 5, the piezoelectric ceramic stacks 3 are formed by alternately pressing the piezoelectric ceramic plates 4 and the electrode plates 5, and the two ends of each piezoelectric ceramic stack 3 are the piezoelectric ceramic plates 4.
The metal shell 1 comprises an upper cover, a lower cover and a middle section circular tube, wherein the upper cover and the lower cover are circular plates with thick centers and thin edges, the middle section circular tube is a circular tube with equal thickness, the outer diameters of the upper cover and the lower cover are equal to the outer diameter of the middle section circular tube, and the upper cover and the lower cover are coaxially arranged and fixedly connected with the middle section circular tube.
The transmission vibration rod 2 is a variable cross-section solid metal rod which is symmetrical up and down, the cross section of the middle section of the transmission vibration rod 2 is square, the cross sections of the upper section and the lower section are circular, the length of the transmission vibration rod 2 is equal to the height of the middle section circular tube of the metal shell 1, the two ends of the transmission vibration rod 2 are fixedly connected with the inner surfaces of the upper cover and the lower cover of the metal shell 1, and the transmission vibration rod 2 is coaxially arranged with the upper cover and the lower cover. Piezoelectric ceramic piles 3 set up 4 groups, and 4 groups of piezoelectric ceramic piles 3 arrange around the middle section of biography pole 2 that shakes along the circumferencial direction, and the axis mutually perpendicular of two sets of adjacent piezoelectric ceramic piles 3 and pass the geometric center of biography pole 2 that shakes.
Each groups of piezoelectric ceramic stacks 3 are formed by bonding 2n PZT-4 piezoelectric ceramic plates 4 and (2n-1) copper electrode plates 5, the 2n piezoelectric ceramic plates 4 are polarized along the thickness direction, the polarization direction of each two adjacent piezoelectric ceramic plates 4 is opposite, the piezoelectric ceramic plates 4 adopt a parallel connection structure on a circuit to form the piezoelectric ceramic stacks, wherein n is a positive integer, the n is determined by the size of a gap between an opening of a metal mass block 6 and a vibration transmission rod 2 and the thickness of the piezoelectric ceramic plates 4, the vibration transmission rod 2 transmits the vibration generated by the four groups of piezoelectric ceramic stacks 3 to the metal shell 1, compared with a driving mode that a plurality of groups of piezoelectric ceramic stacks directly drive different parts of a radiation surface in a transducer, the driving mode with the participation of the vibration transmission rod 2 can effectively couple and concentrate the vibration generated by each piezoelectric ceramic stack at , so that the coherence of the vibration of the radiation surface is improved, the shell only generates integral circular pendulum vibration, the high-order vibration of the shell is reduced, the single performance of the spiral sound wave emitted by the spiral has high linearity, and the directivity of the horizontal phase of the emitted spiral sound wave has high.
The metal mass block 6 is a metal cylinder with an octagonal through hole in the center, a gap is formed between the metal mass block 6 and the metal shell 1, the metal mass block 6 is not in contact with the metal shell 1, the octagonal through hole of the metal mass block 6 is matched with the piezoelectric ceramic stacks 3, and the metal mass block 6 is fixedly connected with the piezoelectric ceramic stacks 3.
All the electrode plates 5 are provided with wire connecting holes 7, when n is larger than or equal to 2, the wire connecting holes 7 of two adjacent electrode plates 5 are arranged in a staggered mode, all the wire connecting holes on the side with fewer wire connecting holes 7 are conducted with the vibration transmission rod 2 and the metal mass block 6 through wires to serve as grounding electrodes, all the wire connecting holes on the side with more wire connecting holes in the 2 groups of piezoelectric ceramic stacks are conducted through wires to serve as Va poles and Vb poles respectively, when n is equal to 1, the vibration transmission rod 2 and the metal mass block 6 are conducted through wires to serve as grounding electrodes, and the electrode plates 5 on the 2 groups of electrodes on the opposite side are conducted through wires to serve as Va poles and Vb poles respectively.
The invention is characterized in that a metal shell 1 is used as an acoustic radiation unit, a metal mass block 6, a piezoelectric ceramic stack 3 and the like are wrapped in the metal shell, the metal shell has an axisymmetric structure, vibration generated by the piezoelectric ceramic stack 3 is firstly concentrated on a vibration transmission rod 2, then the vibration is concentrated and transmitted to the metal shell 1 by the vibration transmission rod 2, and under the drive of groups of double-channel equal-amplitude orthogonal signals, the shell of the transducer does circular oscillation vibration and simultaneously emits spiral sound waves into a medium.
The specific assembling process of spiral sound wave transmitting transducers with vibration transmission rods is as follows:
1. the piezoelectric ceramic piece 4 and the electrode plate 5 are spliced into a piezoelectric ceramic stack 3 through epoxy resin, after the bonding is finished, a lead penetrates through an electrode lead hole on the same side, and the lead is connected with the electrode 5 in a welding mode.
2. 4 groups of piezoelectric ceramic stacks 3 are bonded to four side faces of the middle section of the vibration transmission rod 2 through epoxy resin, and a metal mass block 6 is sleeved on the outer side of the piezoelectric ceramic stacks 3 and bonded through the epoxy resin.
3. The vibration transmission rod 2 with the piezoelectric ceramic stack 3 and the metal mass block 6 bonded is embedded into a metal half shell, and another half shell is assembled and bonded by epoxy resin.
When the transducer works in water, an alternating electric field is applied to a piezoelectric ceramic stack 3, wherein Va and Vb are sinusoidal alternating currents with the same frequency and the same amplitude, and are orthogonal to each other, under the excitation of the alternating electric field, the piezoelectric ceramic stack 3 generates telescopic vibration, a vibration transmission rod 2 transmits the vibration to a metal shell 1, so that the metal shell 1 performs circular pendulum vibration and emits spiral sound waves into surrounding media, the position near the middle part of a circular tube at the middle section of the metal shell 1 is the position with the maximum displacement, and the vibration is transmitted by adopting an axially symmetric shell and the vibration transmission rod, so that the vibration amplitudes in different directions of the shell are the same, and the emitted sound waves have linear directional phases.
Meanwhile, the resonance frequency of the transducer is reduced due to the fact that the vibration transmission rod 2 bends and vibrates and the equivalent rigidity is small, the transducer has the characteristic of low-frequency and small-size emission, spiral sound waves are emitted in the low-frequency and small-size mode, the phase relation of the spiral sound waves is not changed along with the height, vibration of each piezoelectric ceramic stack 3 is coupled at due to the use of the vibration transmission rod 2, unnecessary high-order modes are avoided, and the driving and debugging work of the transducer is simplified due to the minimum number of driving signals.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
- The spiral sound wave transmitting transducer is characterized by comprising a vibration transmission rod (2), a piezoelectric ceramic stack (3) and a metal mass block (6) which are arranged in a metal shell (1), wherein the vibration transmission rod (2) is arranged at the center of the metal shell (1), the upper end and the lower end of the vibration transmission rod (2) are fixedly connected with the metal shell (1), a plurality of groups of piezoelectric ceramic stacks (3) are uniformly distributed on the periphery of the vibration transmission rod (2), the metal mass block (6) is sleeved on the periphery of the piezoelectric ceramic stack (3), each piezoelectric ceramic stack (3) comprises a plurality of piezoelectric ceramic pieces (4) and electrode pieces (5), the piezoelectric ceramic stack (3) is formed by alternately pressing the piezoelectric ceramic pieces (4) and the electrode pieces (5), and two ends of the piezoelectric ceramic stack (3) are both piezoelectric ceramic pieces (4).
- 2. The spiral sound wave transmitting transducer containing vibration rods of claim 1, wherein the metal casing (1) comprises an upper cover, a lower cover and a middle section of circular tube, the upper cover and the lower cover are circular plates with thick centers and thin edges, the middle section of circular tube is a circular tube with equal thickness, the outer diameters of the upper cover and the lower cover are equal to the outer diameter of the middle section of circular tube, and the upper cover and the lower cover are coaxially arranged with the middle section of circular tube and fixedly connected.
- 3. The spiral sound wave transmitting transducer with vibration rods of claim 2, wherein the upper and lower covers are identical in shape, and both the surface near the vibration rods (2) is a flat surface, and the surface is a curved circular plate.
- 4. The spiral sound wave transmitting transducer containing vibration rods of claim 2, wherein the vibration rods (2) are variable cross-section solid metal rods which are symmetrical up and down, the cross section of the middle section of the vibration rods (2) is square, the cross sections of the upper and lower sections are circular, the length of the vibration rods (2) is equal to the height of the middle section of the circular tube of the metal shell (1), the two ends of the vibration rods (2) are fixedly connected with the inner surfaces of the upper cover and the lower cover of the metal shell (1), and the vibration rods (2) are coaxially arranged with the upper cover and the lower cover.
- 5. The spiral sound wave transmitting transducer containing vibration rods of claim 4, wherein the piezoelectric ceramic stacks (3) are arranged in 4 groups, and 4 groups of piezoelectric ceramic stacks (3) are arranged around the middle section of the vibration rod (2) along the circumferential direction, and the central axes of two adjacent groups of piezoelectric ceramic stacks (3) are mutually perpendicular and pass through the geometric center of the vibration rod (2).
- 6. The kind of spiral sound wave transmitting transducer containing vibration-transmitting rods of claim 1, wherein each groups of the piezoelectric ceramic stacks (3) are all in a cuboid structure formed by bonding 2n piezoelectric ceramic plates (4), the 2n piezoelectric ceramic plates (4) are polarized along the thickness direction, the polarization directions of every two adjacent piezoelectric ceramic plates (4) are opposite, and n is a positive integer.
- 7. The spiral sound wave transmitting transducer containing vibration rods of claim 1, wherein the metal mass block (6) is a metal cylinder with an octagonal through hole in the center, a gap is provided between the metal mass block (6) and the metal shell (1), the octagonal through hole of the metal mass block (6) is matched with a plurality of piezoelectric ceramic stacks (3), and the metal mass block (6) is fixedly connected with the piezoelectric ceramic stacks (3).
- 8. The kind of spiral sound wave transmitting transducers with vibration transmission rods according to claim 6, wherein all the electrode plates (5) have wire connecting holes (7), and when the number of piezoelectric ceramic plates (4) in each group of piezoelectric ceramic stacks (3) is greater than or equal to 4, the wire connecting holes (7) of two adjacent electrode plates (5) are arranged in a staggered way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911023253.XA CN110732477B (en) | 2019-10-25 | 2019-10-25 | Spiral sound wave transmitting transducer with vibration transmission rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911023253.XA CN110732477B (en) | 2019-10-25 | 2019-10-25 | Spiral sound wave transmitting transducer with vibration transmission rod |
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| CN110732477A true CN110732477A (en) | 2020-01-31 |
| CN110732477B CN110732477B (en) | 2021-07-23 |
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|---|---|---|---|---|
| EP2302950A2 (en) * | 2009-09-29 | 2011-03-30 | NEC Corporation | Acoustic transducer |
| CN102019273A (en) * | 2010-12-21 | 2011-04-20 | 吴银隆 | Ultrasonic transducer |
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| EP2905093A1 (en) * | 2014-02-07 | 2015-08-12 | SMS Concast AG | Mould assembly for continuous casting of metallic products |
| CN105728306A (en) * | 2016-03-22 | 2016-07-06 | 中国计量学院 | Cross-shaped orthogonal compound drive piezoelectric tubular transducer |
| CN105960291A (en) * | 2014-01-24 | 2016-09-21 | 海尔曼超声波技术两合有限公司 | Converter unit |
| CN205599472U (en) * | 2016-03-22 | 2016-09-28 | 许龙 | Tubular transducer of cross quadrature combined drive piezoelectricity |
| CN205833583U (en) * | 2016-03-22 | 2016-12-28 | 中国计量学院 | The tubular transducer of composite flooding piezoelectric supersonic |
| CN109277364A (en) * | 2018-09-07 | 2019-01-29 | 杭州瑞利科技有限公司 | A kind of ball crown type Embedded Ultrasonic energy converter |
| CN109365253A (en) * | 2018-11-27 | 2019-02-22 | 北京航空航天大学 | A kind of PMNT PZT (piezoelectric transducer) for ultrasonic deicing |
| CN209476645U (en) * | 2018-11-27 | 2019-10-11 | 北京航空航天大学 | A kind of light-duty sandwich transducer based on PMNT piezoelectric material |
-
2019
- 2019-10-25 CN CN201911023253.XA patent/CN110732477B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2302950A2 (en) * | 2009-09-29 | 2011-03-30 | NEC Corporation | Acoustic transducer |
| CN102019273A (en) * | 2010-12-21 | 2011-04-20 | 吴银隆 | Ultrasonic transducer |
| CN201921821U (en) * | 2010-12-21 | 2011-08-10 | 广东固特超声实业有限公司 | Ultrasonic wave energy converter |
| CN105960291A (en) * | 2014-01-24 | 2016-09-21 | 海尔曼超声波技术两合有限公司 | Converter unit |
| EP2905093A1 (en) * | 2014-02-07 | 2015-08-12 | SMS Concast AG | Mould assembly for continuous casting of metallic products |
| CN105728306A (en) * | 2016-03-22 | 2016-07-06 | 中国计量学院 | Cross-shaped orthogonal compound drive piezoelectric tubular transducer |
| CN205599472U (en) * | 2016-03-22 | 2016-09-28 | 许龙 | Tubular transducer of cross quadrature combined drive piezoelectricity |
| CN205833583U (en) * | 2016-03-22 | 2016-12-28 | 中国计量学院 | The tubular transducer of composite flooding piezoelectric supersonic |
| CN109277364A (en) * | 2018-09-07 | 2019-01-29 | 杭州瑞利科技有限公司 | A kind of ball crown type Embedded Ultrasonic energy converter |
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| CN209476645U (en) * | 2018-11-27 | 2019-10-11 | 北京航空航天大学 | A kind of light-duty sandwich transducer based on PMNT piezoelectric material |
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| CN110732477B (en) | 2021-07-23 |
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