CN107462268A - Ultrasonic sensor - Google Patents
Ultrasonic sensor Download PDFInfo
- Publication number
- CN107462268A CN107462268A CN201710861746.5A CN201710861746A CN107462268A CN 107462268 A CN107462268 A CN 107462268A CN 201710861746 A CN201710861746 A CN 201710861746A CN 107462268 A CN107462268 A CN 107462268A
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- CN
- China
- Prior art keywords
- resonator
- ultrasonic sensor
- piezoelectric ceramics
- shell
- ultrasonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/10—Elements for damping the movement of parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/16—Elements for restraining, or preventing the movement of, parts, e.g. for zeroising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
- G01D11/245—Housings for sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
- G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/48—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using wave or particle radiation means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The present invention proposes a kind of ultrasonic sensor, solves the problems, such as that ultrasonic sensor easily produces squeal-noise when in use in the prior art.The ultrasonic sensor includes base, and piezoelectric ceramics is provided with by elastic component on the base, and the piezoelectric ceramics has fixed resonant frequency；Also include the resonator being fixedly connected with piezoelectric ceramics, reinforced between the piezoelectric ceramics and resonator by epoxy, the resonant frequency between the resonator and piezoelectric ceramics matches；Damping material is also pasted with the resonator.The ultrasonic sensor of the present invention is simple in construction, easy to use, can obtain more preferable tonequality, eliminates the caused piping when ultrasonic directional sound equipment uses ordinary ultrasonic wave sensor, and higher unit area power is obtained for ultrasonic directional sound equipment.
Description
Technical field
The present invention relates to ultrasonic sensor technical field, particularly relate to it is a kind of simple in construction, easy to use, can be effective
Eliminate the ultrasonic sensor of squeal-noise.
Background technology
Ultrasonic sensor is the sensor developed using the characteristic of ultrasonic wave, and ultrasonic wave is that a kind of vibration frequency is high
In the mechanical wave of sound wave, occurred as transducing chip under the excitation of voltage caused by vibration, it has, and frequency is high, wavelength is short, around
It is small to penetrate phenomenon, particularly good directionality, ray can be turned into and the features such as direction propagation.Ultrasonic sensor can be to container
State is detected, and can apply to food processing factory, realizes the closed-loop control system of plastics package detection.Ultrasonic sensor
To transparent or colored objects, metal or non-metallic object, solid, liquid, flour can detect.In ultrasonic directional sound equipment
In, energy transducer of the ultrasonic sensor as terminal is commonly used, its transfer voice angle is small, and directive property is good, but due to common super
The metal loudspeaker resonator of sonic sensor easily produces strong aftershock in high drive, causes acoustically having very
Sharp harshness, have a strong impact on properties of product and Consumer's Experience.
The content of the invention
The present invention proposes a kind of ultrasonic sensor, solves ultrasonic sensor in the prior art and easily produces when in use
The problem of raw squeal-noise.
The technical proposal of the invention is realized in this way：Ultrasonic sensor, including base, pass through elasticity on the base
Part is provided with piezoelectric ceramics, and the piezoelectric ceramics has fixed resonant frequency；
Also include the resonator being fixedly connected with piezoelectric ceramics, add between the piezoelectric ceramics and resonator by epoxy
Gu the resonant frequency between the resonator and piezoelectric ceramics matches；
Damping material is also pasted with the resonator.
As a preferred embodiment, also include cylinder shell, the one end open of the shell and provided with to
The step that inner ring protrudes, the entrant sound net being adapted with its internal diameter size is additionally provided with the shell, is provided with the shell by institute
State entrant sound net and act against support frame on the step；
The base, piezoelectric ceramics, resonator are respectively positioned in support frame as described above.
As another preferred embodiment, support frame as described above is adapted for cylinder and with the internal diameter size of shell.
As another preferred embodiment, the other end of the shell is provided with cover plate, and through hole is provided with the cover plate,
The base is provided with the electrode pin penetrated in the through hole.
As another preferred embodiment, the resonant frequency of the resonator and piezoelectric ceramics is 40-80khz.
As another preferred embodiment, the elastic component is silicon rubber.
As another preferred embodiment, the entrant sound net is ultrasonic wave sound-penetrating steel mesh.
As another preferred embodiment, the resonator is aluminum resonator.
As another preferred embodiment, the radial dimension of the resonator is 6.8mm.
After employing above-mentioned technical proposal, the beneficial effects of the invention are as follows：The ultrasonic sensor utilizes piezoelectric ceramic energy
Ultrasonic energy is enough converted electrical energy into, and piezoelectric ceramics is arranged on base by elastic component, can play fixed work
With and can prevents the resonance of base, between resonator and piezoelectric ceramics there is the resonant frequency to match can realize ultrasonic wave
The focusing of energy, at the same paste damping material on the resonator can eliminate it is remaining caused by resonator in conversion process of energy
Shake, thoroughly eliminates sharp harshness, improves the performance of product and the experience of user, and between resonator and piezoelectric ceramics
Being reinforced by epoxy can effectively prevent ultrasonic sensor to be operated in coming off for resonator when under high-voltage case, ensure ultrasound
The normal work of wave sensor.
The parts such as base, piezoelectric ceramics, resonator are installed in support frame, while leaned entrant sound net using support frame
On the step of end, the device of inside can be effectively protected to be not damaged by.
Support frame is arranged to cylinder and is adapted with the internal diameter size of shell to ensure the stability of support frame, is made
It does not shake in the course of the work.
Entrant sound net can not only protect the device of inside to be not damaged by using ultrasonic wave sound-penetrating steel mesh, while can also reach
Certain entrant sound effect, does not interfere with the output of sound.
In ultrasonic directional sound system, in order to obtain narrower sounding angle, it would be desirable to while change piezoelectricity pottery
Porcelain and resonator, the size of the higher resonator of frequency must be smaller, in the material of resonator for, experimental result table at present
Bright, the resonator of aluminum is more conducive to the transmitting of ultrasonic energy.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of an embodiment of the present invention；
In figure：1- bases；2- elastic components；3- piezoelectric ceramics；4- resonators；5- damping materials；6- shells；7- steps；8-
Entrant sound net；9- support frames；10- cover plates；11- through holes；12- electrode pins.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Embodiment：
As shown in figure 1, being a kind of embodiment of ultrasonic sensor of the present invention, the sensor includes base 1, the base
Piezoelectric ceramics 3 is provided with by elastic component 2 on 1, silicon rubber can be selected in elastic component 2, can play fixed effect, and and can prevents
The resonance of base 1, the piezoelectric ceramics 3 have fixed resonant frequency (generally 40-80khz), be convert electrical energy into it is super
The core conversion element of acoustic wave energy.The embodiment also includes the resonator 4 being fixedly connected with piezoelectric ceramics 3, can realize super
The focusing of acoustic wave energy, when resonant frequency is 40khz, the radial dimension of resonator is 6.8mm, and the launch angle of sound is
5 °, resonator 4 comes off during in order to prevent that ultrasonic sensor is operated under high-voltage case, in this embodiment, resonator 4 with
Connection between piezoelectric ceramics 3 has to pass through epoxy reinforcing, and the resonant frequency between resonator 4 and piezoelectric ceramics 3 needs
Match.Damping material 5 is also pasted with resonator 4, can be eliminated remaining caused by resonator 4 in conversion process of energy
Shake, thoroughly eliminates sharp harshness, improves the performance of product and the experience of user.
In ultrasonic directional sound system, in order to obtain narrower sounding angle, it would be desirable to while change piezoelectricity pottery
Porcelain 3 and resonator 4, the size of the higher resonator 4 of frequency must be smaller, in the material of resonator 4 for, experimental result at present
Show, the resonator of aluminum is more conducive to the transmitting of ultrasonic energy.And in order to obtain bigger mechanical shock amplitude, in ultrasound
The piezoelectric ceramics 3 that we select thickness bigger in wave sensor would be even more beneficial to our electric energy to the conversion of ultrasonic energy,
Merely change the thickness of piezoelectric ceramics 3 simultaneously influences less on the resonant frequency of whole sensor.
In addition, the embodiment also includes the shell 6 that shields, the shell 6 is in hollow cylinder, one end opening
And the step 7 prominent to inner ring is provided with, the entrant sound net 6 being adapted with its internal diameter size is additionally provided with the shell 6, and will be saturating
Acoustic mesh 6 acts against the support frame 8 on step 7, and it is in hollow cylinder, its size and the internal diameter size of shell 6 that support frame 8, which is also,
Also it is adapted, will not shakes during ensureing work.The critical component of whole sensor, for example, it is base 1, piezoelectric ceramics 3, humorous
The device 4 etc. that shakes is respectively positioned in support frame 9.Entrant sound net 6 can use ultrasonic wave sound-penetrating steel mesh, can not only protect the device of inside not
It is damaged, while can also reaches certain entrant sound effect, does not interfere with the output of sound.
Cover plate 10 is provided with the other end of shell 6, through hole 11 is provided with the cover plate 10, the base 1 is provided with and penetrated
Electrode pin 12 in the through hole 11, so as to which whole sensor is carried out into installation fixation.
The ultrasonic sensor of the present invention is simple in construction, easy to use, can obtain more preferable tonequality, eliminate in ultrasonic wave
Caused piping when orientation sound equipment uses ordinary ultrasonic wave sensor, and it is higher for the acquisition of ultrasonic directional sound equipment
Unit area power.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (9)
1. ultrasonic sensor, it is characterised in that：Including base, piezoelectric ceramics is provided with by elastic component on the base, institute
Stating piezoelectric ceramics has fixed resonant frequency；
Also include the resonator being fixedly connected with piezoelectric ceramics, reinforced between the piezoelectric ceramics and resonator by epoxy, institute
The resonant frequency stated between resonator and piezoelectric ceramics matches；
Damping material is also pasted with the resonator.
2. ultrasonic sensor as claimed in claim 1, it is characterised in that：Also include the shell of cylinder, the shell
One end open is simultaneously provided with the step prominent to inner ring, and the entrant sound net being adapted with its internal diameter size, institute are additionally provided with the shell
State the support frame for being provided with and acting against the entrant sound net on the step in shell；
The base, piezoelectric ceramics, resonator are respectively positioned in support frame as described above.
3. ultrasonic sensor as claimed in claim 2, it is characterised in that：Support frame as described above for cylinder and with shell
Footpath size is adapted.
4. ultrasonic sensor as claimed in claim 2, it is characterised in that：The other end of the shell is provided with cover plate, described
Through hole is provided with cover plate, the base is provided with the electrode pin penetrated in the through hole.
5. ultrasonic sensor as claimed in claim 1, it is characterised in that：The resonant frequency of the resonator and piezoelectric ceramics
For 40-80khz.
6. ultrasonic sensor as claimed in claim 1, it is characterised in that：The elastic component is silicon rubber.
7. ultrasonic sensor as claimed in claim 2, it is characterised in that：The entrant sound net is ultrasonic wave sound-penetrating steel mesh.
8. ultrasonic sensor as claimed in claim 1, it is characterised in that：The resonator is aluminum resonator.
9. ultrasonic sensor as claimed in claim 1, it is characterised in that：The radial dimension of the resonator is 6.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861746.5A CN107462268A (en) | 2017-09-21 | 2017-09-21 | Ultrasonic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710861746.5A CN107462268A (en) | 2017-09-21 | 2017-09-21 | Ultrasonic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107462268A true CN107462268A (en) | 2017-12-12 |
Family
ID=60553398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710861746.5A Withdrawn CN107462268A (en) | 2017-09-21 | 2017-09-21 | Ultrasonic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107462268A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112890647A (en) * | 2019-12-04 | 2021-06-04 | 深圳市迪万美科技有限公司 | Driving method of ultrasonic skin cleaning instrument |
| CN117664203A (en) * | 2024-01-31 | 2024-03-08 | 成都楷模电子科技有限公司 | Novel high-frequency ultrasonic sensor |
-
2017
- 2017-09-21 CN CN201710861746.5A patent/CN107462268A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112890647A (en) * | 2019-12-04 | 2021-06-04 | 深圳市迪万美科技有限公司 | Driving method of ultrasonic skin cleaning instrument |
| CN117664203A (en) * | 2024-01-31 | 2024-03-08 | 成都楷模电子科技有限公司 | Novel high-frequency ultrasonic sensor |
| CN117664203B (en) * | 2024-01-31 | 2024-04-26 | 成都楷模电子科技有限公司 | High-frequency ultrasonic sensor |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171212 |
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| WW01 | Invention patent application withdrawn after publication |