CN206638741U - A kind of tangential piezoelectric constant d15 measurement apparatus - Google Patents
A kind of tangential piezoelectric constant d15 measurement apparatus Download PDFInfo
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- CN206638741U CN206638741U CN201720168638.5U CN201720168638U CN206638741U CN 206638741 U CN206638741 U CN 206638741U CN 201720168638 U CN201720168638 U CN 201720168638U CN 206638741 U CN206638741 U CN 206638741U
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Abstract
The utility model discloses a kind of tangential piezoelectric constant d15 measurement apparatus, including base, mass, spring clip and upper cover.During measurement, tested piezoelectric is placed between base and mass, and fixed with spring clip, is finally connected upper lid with base.Device is installed back-to-back with reference sensor, and reference sensor is arranged on excitational equipment, the output end connecting detection equipment of device.Vibration is produced by excitational equipment, reference sensor and tested piezoelectric is set to produce output signal, output signal is gathered using detection device, sensitivity with reference sensor is contrasted, and pass through the quality of known quality block, the tangential piezoelectric constant d15 of piezoelectric can be calculated, and compare the waveform or phase of two output signals by detection device, you can differentiate the polarity of tested piezoelectric.
Description
Technical field
It the utility model is related to a kind of fields of measurement of piezoelectric, more particularly to a kind of measurement of shearing-type piezoelectric
Device.
Background technology
Sensor turns into a kind of particularly important instrument for obtaining nature and production information, comes particularly with modern industry
Say, such as lack sensor, modern industry will just lose basis.Piezoelectric is as a critical component in sensor, its property
Energy parameter has conclusive influence to the indices of sensor.Therefore, it is necessary to exactly to the performance parameter of piezoelectric
Measure, can just produce the sensor of one stream.
Piezoelectric can be roughly divided into two kinds of compression-type and shearing-type by structure.The biography made using shearing-type piezoelectric
Sensor has that small volume, sensitivity are big, fixing resonance frequency is high, frequency response range is wide, oscillation crosswise is than small, pedestal strain spirit
The advantages that sensitivity is small, it is widely used, and has the trend for substituting compression-type sensor.Therefore, shearing-type piezoelectric
As critical component therein, greatly developed.
Piezoelectric constant is an important indicator of piezoelectric, directly influences the sensitivity parameter of sensor.Shearing-type
The piezoelectric constant of piezoelectric is tangential piezoelectric constant, and expression symbol is d15.
Measurement tangential piezoelectric constant d15 more common at present mainly uses Quasi-static Method：In quasistatic d33On measuring instrument
45 ° of inclined plane clamps are installed, during measurement, it be normal pressure and shearing force to decompose the exciting force that piezoelectric is subject to, and passes through and calculates shearing
Power and piezoelectric and quasistatic d33The output of measuring instrument, obtain piezoelectric constant d15.Complicated, operation be present in the method
Cumbersome, error is big, the shortcomings of anti-interference difference, and quasistatic d33The piezoelectric constant of reference piezoelectrics in measuring instrument can be because of the time
And change, cause quasistatic d33Measuring instrument output bias, more increase measurement error.
Therefore develop it is a kind of simple and easy, can accurate measurement piezoelectric tangential piezoelectric constant d15 detection technique turn into
Industry thirsts for the problem solved for a long time.
The content of the invention
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of tangential piezoelectric constant d15 measurement
Device, it is simple and easy to do, piezoelectric tangential piezoelectric constant d15 measurement can be realized, overcome the deficiencies in the prior art, improves pressure
Electric material testing efficiency.
To achieve the above object, the utility model provides following technical scheme：A kind of tangential piezoelectric constant d15 measurement
Device, including：
- base, it has the first locating surface；
- mass, it has the second locating surface, and first locating surface is oppositely arranged and formed with second locating surface
With the clearance space of tested piezoelectric form fit；
- setting element, it is forced on the mass, so that second locating surface compresses the tested piezoelectric
In on first locating surface；
Wherein, the base and the mass be conductor, and the setting element is insulator, first locating surface with
Second locating surface is that perpendicular or the section of the two are located in perpendicular, between the base and the mass absolutely
Edge is set, and the mass is also associated with output line.
Further, the base has two first locating surfaces being disposed opposite to each other, and the measurement apparatus includes two
The individual mass, two first locating surfaces are oppositely arranged simultaneously with two the second locating surfaces of two masses respectively
Two clearance spaces are formed, the setting element uses spring clip, and two jig arm of the spring clip exert a force two respectively
On the individual mass.
Further, the base also has the 3rd locating surface, and the 3rd locating surface is horizontal plane, is shelved with thereon
Horizontal backing plate, the drawable setting of the backing plate, for supporting the tested piezoelectric and the mass bottom surface.
Further, the measurement apparatus also includes upper cover, and the upper cover cover sets the tested piezoelectric, the quality
Block and the setting element and lower port is fixedly mounted on the base.
Further, for the base substantially in T-shaped is inverted, the vertical portion of T-shaped sets the first locating surface, the level of T-shaped
Part sets the 3rd locating surface, is located at the vertical portion of T-shaped, and the horizontal component of T-shaped is also fixedly connected with the lower port of a upper cover.
Further, the string holes for penetrating its 3rd locating surface and its end face, the signal are additionally provided with the horizontal component of T-shaped
Output line is fed through the string holes.
Further, first locating surface and second locating surface are plane or are arcwall face.
Further, the bottom surface of the base is additionally provided with the mounting hole for being fixedly connected with reference sensor.
Because above-mentioned technical proposal is used, the utility model has following advantages compared with prior art：
(1) in the prior art, there is certain error in the measurement of tangential piezoelectric constant, and be difficult to calibrate；The utility model profit
It is accurate using dynamic method, measurement with the direct piezoelectric effect principle of piezoelectric, the working condition of real simulation shearing-type sensor
Really, and the reference sensor by measurement and calibration is used to make measurement result more accurate, anti-interference is good, measurement as reference
Efficiency high, the measurement of the piezoelectric especially suitable for making shearing normalization piezoelectric acceleration sensor；
(2) measurement apparatus in the utility model also includes backing plate, and backing plate can be effectively isolated mass and base, prevent from producing
Raw output signal short circuit, another effect of backing plate is to can guarantee that the polarised direction of tested piezoelectric is parallel with direction of vibration,
Avoid tested piezoelectric installation crooked and produce measurement error；
(3) measurement apparatus in the utility model also includes upper cover, and it is connected with the base, makes the tested piezoresistive material
Material, mass and spring clip encapsulation are with inside the upper lid, isolation interference, ensureing test result accuracy；
(4) base in the utility model has two the first locating surfaces, including two quality using T-shaped structure is inverted
Block, to form two clearance spaces by two the first locating surfaces and two the second locating surfaces, while setting element uses spring
Folder, pretightning force is provided to mounted tested piezoelectric and mass, prevents from sliding；
(5) bottom surface of the base in the utility model is additionally provided with mounting hole, is easy to be connected with reference sensor.
Brief description of the drawings
Fig. 1 is the structural representation of tangential piezoelectric constant d15 measurement apparatus disclosed in the utility model；
Fig. 2 is the connection diagram of tangential piezoelectric constant d15 measuring method disclosed in the utility model；
Fig. 3 is the waveform comparison figure of measurement apparatus disclosed in the utility model and the output signal of reference sensor.
Wherein, 1, base；2nd, mass；3rd, it is tested piezoelectric；4th, spring clip；5th, output line；51st, signal output
End；6th, backing plate；7th, upper cover；8th, measurement apparatus；9th, reference sensor；10th, excitational equipment；11st, output line；12nd, detection is set
It is standby.
Embodiment
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
For for illustrating a preferred embodiment of the present utility model, but it is not limited to the scope of the utility model.
Embodiment one：
Referring to Fig. 1, as shown in legend therein, a kind of tangential piezoelectric constant d15 measurement apparatus, including：
- base 1, it has two first opposite locating surfaces；
- two masses 2, each mass 2 have the second locating surface, two the first locating surfaces and two the second locating surface phases
To setting and being formed two clearance spaces with the tested form fit of piezoelectric 3；
- spring clip 4, its two jig arm force on two masses 2 respectively, so that the second locating surface compresses tested piezoresistive material
Material 3 is on the first locating surface；
Wherein, base 1 and mass 2 are conductor, and spring clip 4 is insulator, and the first locating surface and the second locating surface are perpendicular
Straight plane, insulation set between base 1 and mass 2, mass 2 are also associated with output line 5, output line connection
To signal output part 51.
In the prior art, there is certain error in the measurement of tangential piezoelectric constant, and be difficult to calibrate；The utility model is using dynamic
State method, measurement is accurate, and uses the reference sensor by measurement and calibration to make measurement result more accurate as reference, resist dry
Immunity is good, and measurement efficiency is high, the survey of the piezoelectric especially suitable for making shearing normalization piezoelectric acceleration sensor
Amount.Base in the utility model has two the first locating surfaces, including two masses, to pass through using T-shaped structure is inverted
Two the first locating surfaces and two the second locating surfaces form two clearance spaces, while setting element uses spring clip, to installation
Good tested piezoelectric and mass provides pretightning force, prevents from sliding.
In a kind of embodiment, base 1 also has the 3rd locating surface, and the 3rd locating surface is horizontal plane, is shelved with thereon
Horizontal backing plate 6, the drawable support of backing plate 6 are tested piezoelectric 3 and the bottom surface of mass 2.Backing plate 6 can be effectively isolated mass
2 and base 1, the output signal short circuit prevented, another effect of backing plate 6 is to can guarantee that the polarization side of tested piezoelectric 3
To parallel with direction of vibration, tested piezoelectric 3 is avoided to install crooked and produce measurement error
In a kind of embodiment, measurement apparatus also includes upper cover 7, the cover of upper cover 7 set tested piezoelectric 3, mass 2 and
Spring clip 4 and lower port are fixedly mounted on base 1, isolation interference, ensure test result accuracy.
In a kind of embodiment, the string holes for penetrating its 3rd locating surface and its end face, letter are additionally provided with the horizontal component of T-shaped
Number output line 5 wears cable-through hole.The trend of output line 5 is clearer, and does not influence the fixation of upper cover.
In a kind of embodiment, the bottom surface of base 1 is additionally provided with mounting hole.
It is the tangential piezoelectric constant d15 of measurement apparatus measuring method as shown in legend therein referring to Fig. 2, including such as
Lower step：
(1) measurement apparatus 8 is fixed on a reference sensor 9 back-to-back, reference sensor 9 is arranged on an excitational equipment
On 10, the output line 5 of measurement apparatus 8 and the output line 11 of reference sensor 9 are respectively connecting to a detection device 12
On；
(2) excitational equipment 10 is opened, measurement apparatus 8 and reference sensor 9 is produced signal because of vibration and is sent to inspection
Measurement equipment 12；
(3) the output signal Q of collection and recording measuring device 8pWith the output signal Q of reference sensor 9s, it is by following formula
The tangential piezoelectric constant d15 of piezoelectric can be calculated.
Wherein, S be consult measurement and calibration report reference sensor 9 sensitivity；
m1、m2、m3、m4The quality of tested piezoelectric 3 that respectively weighs to obtain, the quality of mass 2, spring clip 4
The quality of the output line 5 of quality and measurement apparatus 8.
Wherein, wherein, in step (1), measurement apparatus 8 is fixed on a reference sensor 9 back-to-back, referred to back-to-back
Both are coaxial, and the mounting surface of base is mounted opposite.The advantages of so installing is that both vibrated acceleration are identical..
Compare the waveform or phase of measurement apparatus 8 and the output signal of reference sensor 9 by detection device 12, according to ginseng
The polarity for examining sensor 9 judges the polarity of tested piezoelectric 3.
Fig. 3 waveforms are observed, according to the polarity of reference sensor
If the polarity of reference sensor is just,
1. phase difference 0, measured material upper surface is positive pole；
2. phase difference 180, measured material lower surface is positive pole；
Polarity such as reference sensor is negative：
1. phase difference 0, measured material lower surface is positive pole；
2. phase difference 180, measured material upper surface is positive pole.
Embodiment two
Further, the first locating surface and the second locating surface are arcwall face, and the section of arcwall face is located in perpendicular.
Claims (8)
- A kind of 1. tangential piezoelectric constant d15 measurement apparatus, it is characterised in that including：- base, it has the first locating surface；- mass, it has the second locating surface, and first locating surface is oppositely arranged with second locating surface and formed and quilt The clearance space of pressure measurement electric material form fit；- setting element, it is forced on the mass, so that second locating surface compresses the tested piezoelectric in institute State on the first locating surface；Wherein, the base and the mass are conductor, and the setting element is insulator, first locating surface and described Second locating surface is that perpendicular or the section of the two are located in perpendicular, and being insulated between the base and the mass sets Put, the mass is also associated with output line.
- 2. tangential piezoelectric constant d15 according to claim 1 measurement apparatus, it is characterised in that the base has phase Two first locating surfaces set are carried on the back, the measurement apparatus includes two masses, two first locating surfaces It is oppositely arranged respectively with two the second locating surfaces of two masses and forms two clearance spaces, the positioning member Part uses spring clip, and two jig arm of the spring clip exert a force on two masses respectively.
- 3. tangential piezoelectric constant d15 according to claim 1 measurement apparatus, it is characterised in that the base also has 3rd locating surface, the 3rd locating surface are horizontal plane, are shelved with horizontal backing plate thereon, and the backing plate is drawable to be set Put, for supporting the tested piezoelectric and the mass bottom surface.
- 4. tangential piezoelectric constant d15 according to claim 1 measurement apparatus, it is characterised in that the measurement apparatus is also Including upper cover, the upper cover cover sets the tested piezoelectric, the mass and the setting element and lower port is consolidated Dingan County is on the base.
- 5. the measurement apparatus of the tangential piezoelectric constant d15 according to claim 3 or 4, it is characterised in that the base is substantially In T-shaped is inverted, the vertical portion of T-shaped sets the first locating surface, and the horizontal component of T-shaped sets the 3rd locating surface, is located at T-shaped Vertical portion, the horizontal component of T-shaped are also fixedly connected with the lower port of a upper cover.
- 6. tangential piezoelectric constant d15 according to claim 5 measurement apparatus, it is characterised in that on the horizontal component of T-shaped The string holes for penetrating its 3rd locating surface and its end face is additionally provided with, the output line is fed through the string holes.
- 7. tangential piezoelectric constant d15 according to claim 1 measurement apparatus, it is characterised in that first locating surface It is plane with second locating surface or is arcwall face.
- 8. tangential piezoelectric constant d15 according to claim 1 measurement apparatus, it is characterised in that the bottom surface of the base It is additionally provided with the mounting hole for being fixedly connected with reference sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720168638.5U CN206638741U (en) | 2017-02-24 | 2017-02-24 | A kind of tangential piezoelectric constant d15 measurement apparatus |
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| CN201720168638.5U CN206638741U (en) | 2017-02-24 | 2017-02-24 | A kind of tangential piezoelectric constant d15 measurement apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045084A (en) * | 2017-02-24 | 2017-08-15 | 苏州东菱振动试验仪器有限公司 | A kind of tangential piezoelectric constant d15Measurement apparatus and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045084A (en) * | 2017-02-24 | 2017-08-15 | 苏州东菱振动试验仪器有限公司 | A kind of tangential piezoelectric constant d15Measurement apparatus and method |
| CN107045084B (en) * | 2017-02-24 | 2023-11-03 | 苏州东菱振动试验仪器有限公司 | Tangential piezoelectric constant d 15 Measuring device and method of (a) |
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