CN204330900U - Based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured - Google Patents
Based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured Download PDFInfo
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- CN204330900U CN204330900U CN201420854340.6U CN201420854340U CN204330900U CN 204330900 U CN204330900 U CN 204330900U CN 201420854340 U CN201420854340 U CN 201420854340U CN 204330900 U CN204330900 U CN 204330900U
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Abstract
The utility model provides a kind of piezoelectric strain constant measurement mechanism directly measured based on dynamic force, comprising: sample loading head, for loading piezoelectric to be measured; Static load measuring unit, is positioned at the top of sample loading head, and is connected with sample loading head, for measuring the static load load forces on piezoelectric to be measured; Dynamic force drive source, is positioned at the below of sample loading head; Dynamic force sensor, between sample loading head and dynamic force drive source, for directly measuring the quasi-static force size being carried in piezoelectric two ends to be measured; Binary channels charge amplifier, is connected with dynamic force sensor, and binary channels charge amplifier is also for being connected with piezoelectric to be measured; Data acquisition unit, is connected with binary channels charge amplifier, exports for measuring its electric charge.The size that the utility model adopts dynamic force sensor directly to measure quasi-static force avoids the use with reference to piezoelectric, achieve quasi-static method piezoelectric strain constant measure in directly the tracing to the source of each parameter.
Description
Technical field
The utility model relates to acoustic metrology field tests, particularly relates to a kind of piezoelectric strain constant measurement mechanism directly measured based on dynamic force.
Background technology
The piezoelectric strain constant of piezoelectric weighs the important indicator of its energy conversion efficiency, and current measuring method is divided into dynamic resonance method, quasi-static method, laser optical method etc. based on inverse piezoelectric effect.Dynamic resonance method has strict restriction for the size of sample, and obtain its parameter by the electricity resonance of sample, computation process is comparatively complicated, and it is higher that the laser measuring device for measuring based on inverse piezoelectric effect sets up cost.Quasi-static method is easy to realize, and is carried on testing sample by quasi-static force, and the quasistatic force value size loaded according to it and the electric charge size of output obtain its piezoelectric strain constant.
In prior art, the patent No. is 97231420.2, utility model title is the patent documentation of the longitudinal piezoelectric strain constant measuring instrument of quasi-static method, adopts built-in reference piezoelectric, obtains the piezoelectric strain constant of piezoelectric to be measured according to reference material and the ratio of detected materials output charge.And be adopt dynamic resonance method to obtain with reference to the piezoelectric strain constant of piezoelectric, in fact dynamic resonance method obtain tens KHz frequencies often under piezoelectric strain constant, and the frequency of quasi-static method is generally about 100Hz, its piezoelectric strain constant of different materials has different frequency characteristics.Therefore, how solving quasi-static method, to measure reference piezoelectric in piezoelectric strain constant in the problem that the piezoelectric constant of low frequency cannot directly be traced to the source be an another difficult problem in the industry.
Utility model content
Feature and advantage of the present utility model are partly stated in the following description, or can be apparent from this description, or learn by putting into practice the utility model.
For overcoming the problem of prior art, the utility model provides a kind of piezoelectric strain constant measurement mechanism directly measured based on dynamic force, dynamic force sensor is adopted directly to measure the quasi-static force size being carried in piezoelectric two ends to be measured, get around the problem with reference to piezoelectric, thus realize directly tracing to the source of piezoelectric strain constant quasi-static method measurement.
It is as follows that the utility model solves the problems of the technologies described above adopted technical scheme:
According to an aspect of the present utility model, a kind of piezoelectric strain constant measurement mechanism directly measured based on dynamic force is provided, it is characterized in that, comprising: sample loading head, for loading piezoelectric to be measured; Static load measuring unit, is positioned at the top of this sample loading head, and is connected with this sample loading head; Dynamic force drive source, is positioned at the below of this sample loading head; Dynamic force sensor, between this sample loading head and this dynamic force drive source, and its one end is connected with this sample loading head, and the other end is connected with this dynamic force drive source; Binary channels charge amplifier, is connected with this dynamic force sensor, and this binary channels charge amplifier is also for being connected with this piezoelectric to be measured; Data acquisition unit, is connected with this binary channels charge amplifier.
According to an embodiment of the present utility model, also comprise source driving signal, be connected with this dynamic force drive source.
According to an embodiment of the present utility model, this dynamic force drive source is electromagnetic exciter.
According to an embodiment of the present utility model, this sample loading head comprises loading head and lower loading head, and on this, loading head is connected with this static load measuring unit by first connecting rod, and this lower loading head is connected with this dynamic force sensor by second connecting rod.
According to an embodiment of the present utility model, this sample loading head, static load measuring unit, dynamic force drive source, dynamic force sensor in the vertical direction are in same axis.
According to an embodiment of the present utility model, also comprise bearing, by base, the top parallel with this base and the connecting rod for connecting this base and top; This base is for placing this dynamic force drive source, and this top is used for being connected with this static load measuring unit.
According to an embodiment of the present utility model, this connecting rod is provided with adjusting handle, for changing the distance between this base and top, regulates the static load load forces on this piezoelectric to be measured.
The utility model adopts electromagnetic exciter as dynamic force drive source, adopts dynamic force sensor directly to measure the size of dynamic force, according to the electric charge size that piezoelectric to be measured exports, calculates the piezoelectric strain constant of piezoelectric.This kind of devices and methods therefor avoids the use of reference piezoelectric, and the measurement making quasi-static method measure piezoelectric strain constant can directly be traced to the source to dynamic force and charge measurement.
By reading instructions, those of ordinary skill in the art will understand the characteristic sum content of these technical schemes better.
Accompanying drawing explanation
Below by with reference to accompanying drawing describe the utility model particularly in conjunction with example, advantage of the present utility model and implementation will be more obvious, wherein content shown in accompanying drawing is only for explanation explanation of the present utility model, and do not form restriction of going up in all senses of the present utility model, in the accompanying drawings:
Fig. 1 is the structural representation of the piezoelectric strain constant measurement mechanism directly measured based on dynamic force of the utility model embodiment.
Embodiment
As shown in Figure 1, the utility model provides a kind of piezoelectric strain constant measurement mechanism directly measured based on dynamic force, it is characterized in that, comprising: sample loading head 3, for loading piezoelectric 4 to be measured; Static load measuring unit 1, is positioned at the top of sample loading head 3, and is connected with sample loading head 3, for measuring the static load load forces on piezoelectric to be measured; Dynamic force drive source 10, is positioned at the below of sample loading head 3, for providing dynamic force for piezoelectric to be measured; Dynamic force sensor 8, between sample loading head 3 and dynamic force drive source 10, and its one end is connected with sample loading head 3, and the other end is connected with dynamic force drive source 10, for directly measuring the quasi-static force size being carried in piezoelectric two ends to be measured; Binary channels charge amplifier 5, is connected with dynamic force sensor 8, and binary channels charge amplifier is also for being connected with piezoelectric to be measured; Data acquisition unit 6, is connected with binary channels charge amplifier 5, exports for measuring its electric charge.Charge conversion can become voltage to export through charge amplifier 5 by the electric charge that dynamic force sensor 8 like this and piezoelectric 4 to be measured export, and is gathered by data acquisition unit 6.
Sample loading head 3 comprises loading head and lower loading head, and piezoelectric to be measured is placed and between upper loading head and lower loading head; Wherein go up loading head to be connected with static load measuring unit 1 by first connecting rod 2, lower loading head is connected with dynamic force sensor 8 by second connecting rod 7; Then be connected by third connecting rod 9 between dynamic force sensor 8 with dynamic force drive source 10.Above-mentioned sample loading head 3, static load measuring unit 1, dynamic force drive source 10, dynamic force sensor 8 and piezoelectric to be measured 4 in the vertical direction are in same axis, and namely respective central axis overlaps.
In addition, also comprise source driving signal 11, be connected with dynamic force drive source 10, for exporting 90Hz ~ 200Hz, this dynamic force drive source 10 can adopt electromagnetic exciter.
In the present embodiment, also comprise bearing 12, by base, the top parallel with base and the connecting rod for connecting base and top; Base is for placing dynamic force drive source 10, and top is used for being connected with static load measuring unit 1.Connecting rod is provided with adjusting handle 13, for changing the distance between base and top, regulates the static load load forces on piezoelectric to be measured.In the specific implementation, connecting rod can be divided into upper semisection and lower semisection, and wherein upper semisection is provided with guide rail, and lower semisection is provided with the groove coordinated with guide rail, can be regulated and fix the coasting distance of upper semisection in lower semisection groove by adjusting handle 13.
The utility model also provides a kind of piezoelectric strain constant measuring method directly measured based on dynamic force, and it comprises: on sample loading head, fix piezoelectric to be measured, and applies static load load forces to piezoelectric to be measured; Dynamic force sensor between sample loading head with dynamic force drive source and piezoelectric to be measured are all connected with charge amplifier, and charge amplifier is connected with data acquisition unit; Drive dynamic force drive source; The size of data acquisition dynamic force exported according to data acquisition unit and the size of piezoelectric output charge to be measured; According to the ratio of electric charge and dynamic force, obtain the piezoelectric strain constant of piezoelectric to be measured.
Wherein, when applying static load load forces to piezoelectric to be measured, the static load load forces on piezoelectric to be measured is made to reach 10N; The voltage signal utilizing 90Hz ~ 200Hz can be adopted when driving dynamic force drive source.In addition, the sensitivity of dynamic force sensor will adopt the method for recommending in JJF1370-2012 sine method force snesor Calibration of Dynamic specification to calibrate.
The piezoelectric strain constant measurement mechanism realization of directly measuring based on dynamic force that the above-mentioned piezoelectric strain constant measuring method directly measured based on dynamic force can adopt the utility model to provide.
The piezoelectric strain constant measurement mechanism directly measured based on dynamic force that the utility model provides and method, using electromagnetic exciter as dynamic force drive source, dynamic force sensor and charge amplifier is adopted directly to measure the size of dynamic force, according to the electric charge size that piezoelectric to be measured exports, calculate the piezoelectric strain constant of piezoelectric; Avoid the use with reference to piezoelectric, the problem of piezoelectric constant when how the high band piezoelectric strain constant without the need to the acquisition of consideration reference piezoelectric dynamic resonance method is revised and just can be obtained low frequency; Achieve quasi-static method piezoelectric strain constant measure in directly the tracing to the source of each parameter.
Above with reference to the accompanying drawings of preferred embodiment of the present utility model, those skilled in the art do not depart from scope of the present utility model and essence, and multiple flexible program can be had to realize the utility model.For example, to illustrate as the part of an embodiment or the feature that describes can be used for another embodiment to obtain another embodiment.These are only the better feasible embodiment of the utility model, not thereby limit to interest field of the present utility model that the equivalence change that all utilization the utility model instructionss and accompanying drawing content are done all is contained within interest field of the present utility model.
Claims (7)
1., based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, comprising:
Sample loading head, for loading piezoelectric to be measured;
Static load measuring unit, is positioned at the top of described sample loading head, and is connected with described sample loading head;
Dynamic force drive source, is positioned at the below of described sample loading head;
Dynamic force sensor, between described sample loading head and described dynamic force drive source, and its one end is connected with described sample loading head, and the other end is connected with described dynamic force drive source;
Binary channels charge amplifier, is connected with described dynamic force sensor, and described binary channels charge amplifier is also for being connected with described piezoelectric to be measured;
Data acquisition unit, is connected with described binary channels charge amplifier.
2. according to claim 1 based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, also comprise source driving signal, be connected with described dynamic force drive source.
3. according to claim 1 or 2 based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, described dynamic force drive source is electromagnetic exciter.
4. according to claim 1 based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, described sample loading head comprises loading head and lower loading head, described upper loading head is connected with described static load measuring unit by first connecting rod, and described lower loading head is connected with described dynamic force sensor by second connecting rod.
5. according to claim 1 based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, described sample loading head, static load measuring unit, dynamic force drive source, dynamic force sensor in the vertical direction are in same axis.
6. according to claim 1 based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, also comprise bearing, by base, the top parallel with described base and the connecting rod for connecting described base and top; Described base is for placing described dynamic force drive source, and described top is used for being connected with described static load measuring unit.
7. according to claim 6 based on the piezoelectric strain constant measurement mechanism that dynamic force is directly measured, it is characterized in that, described connecting rod is provided with adjusting handle, for changing the distance between described base and top, regulates the static load load forces on described piezoelectric to be measured.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502737A (en) * | 2014-12-29 | 2015-04-08 | 中国计量科学研究院 | Direct dynamic force measurement based piezoelectric strain constant measurement device and method |
| CN107300433A (en) * | 2017-06-19 | 2017-10-27 | 重庆大学 | A kind of method that utilization piezoelectric force transducer measures static force |
| WO2019041996A1 (en) * | 2017-09-01 | 2019-03-07 | 深圳龙海特机器人科技有限公司 | Sensing handle and carrying device |
| GB2572334A (en) * | 2018-03-26 | 2019-10-02 | Electrosciences Ltd | A device for measuring piezoelectricity |
-
2014
- 2014-12-29 CN CN201420854340.6U patent/CN204330900U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502737A (en) * | 2014-12-29 | 2015-04-08 | 中国计量科学研究院 | Direct dynamic force measurement based piezoelectric strain constant measurement device and method |
| CN107300433A (en) * | 2017-06-19 | 2017-10-27 | 重庆大学 | A kind of method that utilization piezoelectric force transducer measures static force |
| CN107300433B (en) * | 2017-06-19 | 2019-12-03 | 重庆大学 | A method of static force is measured using piezoelectric force transducer |
| WO2019041996A1 (en) * | 2017-09-01 | 2019-03-07 | 深圳龙海特机器人科技有限公司 | Sensing handle and carrying device |
| GB2572334A (en) * | 2018-03-26 | 2019-10-02 | Electrosciences Ltd | A device for measuring piezoelectricity |
| GB2572334B (en) * | 2018-03-26 | 2020-09-09 | Electrosciences Ltd | An electrode for a device for measuring piezoelectricity |
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