CN205341214U - Two excitation piezoelectricity ultrasonic transducer - Google Patents
Two excitation piezoelectricity ultrasonic transducer Download PDFInfo
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- CN205341214U CN205341214U CN201521095907.7U CN201521095907U CN205341214U CN 205341214 U CN205341214 U CN 205341214U CN 201521095907 U CN201521095907 U CN 201521095907U CN 205341214 U CN205341214 U CN 205341214U
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Abstract
The utility model discloses a two excitation piezoelectricity ultrasonic transducer, it includes a bacillary connecting element and overlaps in proper order and establish the back shroud, back exciting element, transition piece, preceding exciting element and the front shroud that compress tightly each other on the connecting element, back exciting element with preceding exciting element is all established including the cover a pair of electrode slice and a piezoelectricity wafer on the connecting element, the piezoelectricity wafer clip is in between the electrode slice, the electrode slice of back exciting element front end even has the wire to be used for the one end of connecting, the electrode slice of preceding exciting element front end even has the wire to be used for the other end of connecting. Back exciting element with preceding exciting element can encourage the emergence vibration and vibrate the form on the contrary simultaneously to the mode of vibration of " compression - diastole " drives the supersound conduction is carried out in transition piece circulation vibration, and amplitude ratio and output efficiency around can improving improve the efficiency transformation rate.
Description
Technical field
This utility model relates to ultrasonic transducer field, particularly relates to a kind of double excitation piezoelectric ultrasonic transducer.
Background technology
Ultrasonic transducer is the signal of telecommunication of alternation to convert to acoustical signal in ultrasonic frequency range or the acoustical signal in extraneous sound field is converted to the energy conversion device of the signal of telecommunication.Should owing to much physics, chemistry and bioequivalence can be produced when ultrasound wave is propagated in media as well, simultaneously as ultrasound wave penetration power is strong, convergence good, information carrying amount big, be easily achieved online Non-Destructive Testing and Nondestructive fast and accurately, because being widely used in industry, agricultural, national defence, biological medicine and scientific research etc..
The kind of ultrasonic transducer is a lot, and wherein piezoelectric ultrasonic transducer is most widely used one.Piezoelectric ultrasonic transducer is by the various electrolytes with piezoelectric effect, such as quartz, piezoelectric ceramics, piezo-electricity composite material and piezoelectric membrane etc., converts the electrical signal to acoustical signal, or converts acoustic signals into the signal of telecommunication, thus realizing the conversion of energy.Piezoceramic material is material extremely conventional in current ultrasonic investigation and application, has lot of advantages, and therefore piezoelectric ceramic transducer obtains most commonly used application.
Existing piezoelectric ultrasonic transducer includes single excitation piezoelectric ultrasonic transducer and double excitation piezoelectric ultrasonic transducer:
Fig. 1 is single structural representation encouraging piezoelectric transducer, it includes bolt 11 and the back shroud 12, exciting element 13 and the front shroud 14 that are sequentially sleeved on bolt 11 and mutually compress, exciting element 13 includes four electrode slices 131 and four piezoelectric ceramic pieces 132, electrode slice 131 and piezoelectric ceramic piece 132 are alternately set on bolt 1 successively.Single excitation piezoelectric ultrasonic transducer operation principle is: by bolt 11, exciting unit 13 is applied constant prestressing force, electrode slice 131 is close to piezoelectric ceramic piece 132, electrode slice 131 applies voltage can make piezoelectric ceramic piece 132 be deformed under inverse piezoelectric effect and vibrate, mechanical energy is converted to by electric energy, complete the conversion of amplitude again through front shroud 14 and export, thus completing hyperacoustic conduction；And back shroud is made up of heavy metal material so that energy is minimally from the back shroud surface emissivity of transducer, thus improving forward radiation power, namely realize single one-way radiation encouraging piezoelectric ultrasonic transducer.Due to the restriction of exciting element 13 structure, prestressing force loads limited, and the amplitude of deformation of piezoelectric ceramic piece 132 is less, causes that the front and back Amplitude Comparison of input and output is little, and efficiency conversion is relatively low.
Utility model content
The technical problem that this utility model is not enough for excitation piezoelectric ultrasonic transducer prestressing force single in prior art, piezoelectric ceramic piece vibration loss is big, efficiency conversion is low, it is therefore intended that the double excitation ultrasonic transducer that the conversion of a kind of efficiency is high is provided.
Double excitation piezoelectric ultrasonic transducer of the present utility model is a column, and it includes a shaft-like connecting element and is sequentially sleeved in described connecting element and the back shroud mutually compressed, rear exciting element, transition block, front exciting element and front shroud；Described rear exciting element and described front exciting element all include the pair of electrodes sheet and the piezoelectric chip that are set in described connecting element, and described piezoelectric chip is clipped between described electrode slice；The electrode slice of rear exciting element front end is connected with wire for connecting one end of power supply；The electrode slice of front exciting element front end is connected with wire for connecting the other end of power supply；The electrode slice of described rear exciting element rear end and the electrode slice of described front exciting element rear end are not connected with wire, do not connect power supply and are considered as ground connection.
Described rear exciting element and described front exciting element are separated by double excitation piezoelectric ultrasonic transducer of the present utility model by described transition block, can be effectively increased described rear exciting element and prestressing force that described front exciting element is subject to.During work energising, the front exciting element of described rear exciting element and institute encourages simultaneously, and the alternating electric field that the voltage direction that produces respectively between two electrode slices of described rear exciting element and between two electrode slices of described front exciting element is contrary, when namely forming forward voltage between two electrode slices of described rear exciting element, described front exciting element forms negative voltage, or described rear exciting element forms described front exciting element formation negative voltage during forward voltage in turn.It is clipped in the piezoelectric ceramic piece generation inverse piezoelectric effect in alternating electric field and produces " compression-diastole " cycling cycling vibration, the voltage direction of the alternating electric field because producing is contrary, the vibration shape of described rear exciting element and described front exciting element is contrary, namely described rear exciting element compression time described front exciting element diastole, or in turn described rear exciting element diastole time described front exciting element compression.The vibration mode of this " compression-diastole " drives the circulation vibration of described transition block, can improve front and back amplitude ratio and delivery efficiency.
The front end of described rear exciting element and described front exciting element is additionally provided with a piezoelectric chip respectively, improves efficiency conversion ratio with this.
Described connecting element includes a bolt and an inner screw, described inner screw be positioned at described bolt front and with described bolt in the middle of leave segment gap, the second half section of described back shroud, described rear exciting element and described transition block is sequentially sleeved on described bolt, and the first half section of described transition block, described front exciting element and described front shroud are sequentially sleeved on inner screw.
Described piezoelectric chip can be quartz, piezoelectric ceramics, piezo-electricity composite material or piezoelectric membrane, and in a preferred embodiment of the present utility model, described piezoelectric chip is piezoelectric ceramic piece.
When described connecting element is metallic article, for avoiding because described connecting element is short-circuited between described electrode slice, can serve as a contrast respectively between described connecting element and described rear exciting element, described connecting element and described front exciting element and set insulation sleeve.
Positive progressive effect of the present utility model:
The described rear exciting element of double excitation piezoelectric ultrasonic transducer of the present utility model and described front exciting element encourage generation vibration and vibration shape contrary simultaneously, the circulation vibration of described transition block is driven to carry out ultrasonic conducting with the vibration mode of " compression-diastole ", improve front and back amplitude ratio and delivery efficiency, the shortcoming that single excitation piezoelectric ultrasonic transducer prestressing force is not enough and piezoelectric ceramic piece vibration loss is big can be overcome, improve efficiency conversion ratio, thus saving power supply cost.
Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to be fully understood from the purpose of this utility model, feature and effect.
Accompanying drawing explanation
Fig. 1 is single excitation piezoelectric ultrasonic transducer schematic diagram.
Fig. 2 is double excitation piezoelectric ultrasonic transducer schematic diagram of the present utility model.
Fig. 3 is the sectional view of the double excitation piezoelectric ultrasonic transducer shown in Fig. 2.
Detailed description of the invention
Enumerate preferred embodiment below, and become apparent from intactly illustrating this utility model in conjunction with accompanying drawing.
The purpose of this utility model is achieved through the following technical solutions:
Shown in Fig. 2, the double excitation piezoelectric ultrasonic transducer of the present embodiment includes a connecting element 21 and the back shroud 22, rear exciting element 23, transition block 24, front exciting element 25 and the front shroud 26 that are sequentially sleeved in connecting element 21 and mutually compress.
Connecting element 21 includes the bolt 211 of rear end and the inner screw 212 of front end, leaves gap between bolt 211 and inner screw；The second half section of back shroud 22, rear exciting element 23 and transition block 24 is sequentially sleeved on bolt 211；The first half section of transition block 24, front exciting element 25 and front shroud 26 are sequentially sleeved on inner screw 212；Between bolt 211 and rear exciting element 23, it is lined with insulation sleeve 27 respectively between inner screw 212 and front exciting element 25, as shown in sectional view Fig. 3.
Rear exciting element 23 includes two electrode slice 231 and two piezoelectric ceramic pieces 232 replaced successively, and front exciting element 24 includes two electrode slices 251 and the two pressure potsherds 252 replaced successively；Two electrode slices 231 are positioned at a piece of of front end be connected with wire and be connected with one end of power supply, two electrode slices 251 are positioned at a piece of of front end and are connected with wire and are connected with the other end of power supply.
During work energising, rear exciting element 23 and front exciting element 25 encourage simultaneously, the voltage direction between voltage direction and two electrode slices 251 between two electrode slices 231 is contrary, make piezoelectric ceramic piece 232 and piezoelectric ceramic piece 252 produce inverse piezoelectric effect and carry out " compression-diastole " cycling cycling vibration, and piezoelectric ceramic piece 232 piezoelectric ceramic piece 252 diastole when compressing, during piezoelectric ceramic piece 232 diastole, piezoelectric ceramic piece 252 compresses.Piezoelectric ceramic piece 232 and piezoelectric ceramic piece 252 drive transition block 24 circulation vibration jointly, are effectively improved front and back amplitude ratio, increase delivery efficiency.
A preferred embodiment of the present utility model described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technical staff in the art pass through the available technical scheme of logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model, all should in the protection domain being defined in the patent claims.
Claims (5)
1. a double excitation piezoelectric ultrasonic transducer, is a column, it is characterised in that: it includes a shaft-like connecting element and is sequentially sleeved in described connecting element and the back shroud mutually compressed, rear exciting element, transition block, front exciting element and front shroud；Described rear exciting element and described front exciting element all include the pair of electrodes sheet and the piezoelectric chip that are set in described connecting element, and described piezoelectric chip is clipped between described electrode slice；The electrode slice of rear exciting element front end is connected with wire for connecting one end of power supply；The electrode slice of front exciting element front end is connected with wire for connecting the other end of power supply.
2. double excitation piezoelectric ultrasonic transducer as claimed in claim 1, it is characterised in that: the front end of described rear exciting element and described front exciting element is additionally provided with a piezoelectric chip respectively.
3. double excitation piezoelectric ultrasonic transducer as claimed in claim 1, it is characterized in that: described connecting element includes a bolt and an inner screw, described inner screw be positioned at described bolt front and with described bolt in the middle of leave segment gap, the second half section of described back shroud, described rear exciting element and described transition block is sequentially sleeved on described bolt, and the first half section of described transition block, described front exciting element and described front shroud are sequentially sleeved on inner screw.
4. the double excitation piezoelectric ultrasonic transducer as described in any one of claims 1 to 3, it is characterised in that: described piezoelectric chip is piezoelectric ceramic piece.
5. double excitation piezoelectric ultrasonic transducer as claimed in claim 4, it is characterised in that: its be lining between described connecting element and described rear exciting element in also including and in be lining in the insulation sleeve between described connecting element and described front exciting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521095907.7U CN205341214U (en) | 2015-12-24 | 2015-12-24 | Two excitation piezoelectricity ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521095907.7U CN205341214U (en) | 2015-12-24 | 2015-12-24 | Two excitation piezoelectricity ultrasonic transducer |
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| Publication Number | Publication Date |
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| CN205341214U true CN205341214U (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521095907.7U Active CN205341214U (en) | 2015-12-24 | 2015-12-24 | Two excitation piezoelectricity ultrasonic transducer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737709A (en) * | 2017-11-30 | 2018-02-27 | 中国计量大学 | Double excitation two dimension coupled longitudinal vibration sandwich piezoelectric ultrasonic transducer |
| CN108838056A (en) * | 2018-07-03 | 2018-11-20 | 广东固特超声股份有限公司 | A kind of multiple activation round tube high power altrasonic transducer |
| CN109701857A (en) * | 2018-12-27 | 2019-05-03 | 中北大学 | Adapt to micro- Wide Band Power ultrasonic transducer of frequency drift |
| CN113522710A (en) * | 2021-08-20 | 2021-10-22 | 广东固特超声股份有限公司 | Ultrasonic transducer and ultrasonic device provided with same |
-
2015
- 2015-12-24 CN CN201521095907.7U patent/CN205341214U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737709A (en) * | 2017-11-30 | 2018-02-27 | 中国计量大学 | Double excitation two dimension coupled longitudinal vibration sandwich piezoelectric ultrasonic transducer |
| CN107737709B (en) * | 2017-11-30 | 2022-09-16 | 中国计量大学 | Double-excitation two-dimensional longitudinal coupling vibration sandwich type piezoelectric ultrasonic transducer |
| CN108838056A (en) * | 2018-07-03 | 2018-11-20 | 广东固特超声股份有限公司 | A kind of multiple activation round tube high power altrasonic transducer |
| CN108838056B (en) * | 2018-07-03 | 2024-04-26 | 广东固特超声股份有限公司 | Multi-excitation circular tube high-power ultrasonic transducer |
| CN109701857A (en) * | 2018-12-27 | 2019-05-03 | 中北大学 | Adapt to micro- Wide Band Power ultrasonic transducer of frequency drift |
| CN113522710A (en) * | 2021-08-20 | 2021-10-22 | 广东固特超声股份有限公司 | Ultrasonic transducer and ultrasonic device provided with same |
| CN113522710B (en) * | 2021-08-20 | 2022-04-12 | 广东固特超声股份有限公司 | Ultrasonic device provided with ultrasonic transducer |
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