CN214375157U - Test device and test system - Google Patents

Abstract

The application discloses testing arrangement and test system for test piezoelectric motor's vibration performance parameter. The testing device comprises a base, a pressing assembly and a collecting assembly. The base is used for bearing the piezoelectric motor to be tested; the pressing component is arranged on one side of the base and used for applying different pressures to the piezoelectric motor to be tested at different moments; the acquisition assembly is arranged on one side, deviating from the pressing assembly, of the base and is used for acquiring vibration performance parameters generated by the piezoelectric motor when the piezoelectric motor is pressed. The testing device can be used for testing the vibration performance parameters of the piezoelectric motor under different pressures, and can also be used for continuously acquiring the vibration performance parameters of the piezoelectric motor under different excitation voltages in a sectional manner by the acquisition assembly under variable pressure, so that the testing process of the piezoelectric motor is shortened, the detection time is saved, and the production cost is reduced.

Description

Test device and test system

Technical Field

The application relates to the technical field of piezoelectric motor testing, in particular to a testing device and a testing system.

Background

The piezoelectric material has the characteristics of wide working frequency band, high vibration intensity, short response time, low power consumption and the like, and is generally used in the field of touch feedback. The existing piezoelectric motor is used as a core of touch feedback, and after the lamination is completed, vibration performance parameters need to be tested on different areas of the piezoelectric motor.

In the course of implementing the present application, the applicant has found that there are at least the following problems in the prior art: the direct test of the vibration performance parameters of the piezoelectric motor in the idle state cannot truly reflect the application scenario of the piezoelectric motor, and in a general application scenario, a user may transfer a load to the piezoelectric motor by direct or indirect pressing, so that the vibration performance parameters of the piezoelectric motor under different loads need to be further tested.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a testing apparatus and a testing system to solve the above problems.

An embodiment of the present application provides a testing apparatus for testing vibration performance parameters of a piezoelectric motor, including:

the base is used for bearing the piezoelectric motor to be tested;

the pressing component is arranged on one side of the base and used for applying different pressures to the piezoelectric motor to be tested at different moments; and

the acquisition assembly is arranged on one side, deviating from the pressing assembly, of the base and used for acquiring vibration performance parameters generated by the piezoelectric motor when the piezoelectric motor is pressed.

The testing device applies different pressures to the piezoelectric motors placed on the base at different moments through the pressing assembly, the piezoelectric motors are connected with excitation voltage to generate vibration, and the vibration performance parameters generated when the piezoelectric motors are applied with the different pressures are collected through the collecting assembly so as to test the vibration performance parameters of the piezoelectric motors under different pressures. The piezoelectric motor can also generate different vibration performance parameters by introducing different excitation voltages under the same pressure so as to be collected by the collecting assembly, and the testing device can also realize that the collecting assembly can continuously collect the vibration performance parameters of the piezoelectric motor under different excitation voltages in sections under variable pressure, thereby shortening the testing procedure of the piezoelectric motor, saving the detection time and reducing the production cost.

In some embodiments, the pressing assembly comprises:

the connecting piece is arranged on one side of the base and extends along a first direction, and the first direction is parallel to the direction in which the pressing component applies pressure to the piezoelectric motor;

the coil is sleeved on the connecting piece; and

the magnetic part is arranged at one end, close to the base, of the connecting part in a sliding mode, and the change of the magnetic force between the coil and the magnetic part is controlled by the alternating voltage in the coil.

So, press the subassembly through letting in different alternating voltage in the coil to change the magnetic force between coil and the magnetic part, thereby change and press the subassembly and apply in piezoelectric motor's pressure, and the pressure value be can be continuous, adjustable, be favorable to accurate control to press the subassembly and apply in piezoelectric motor's pressure, accurate collection piezoelectric motor's vibration performance parameter.

In some embodiments, the pressing assembly further comprises:

and the stop piece is arranged on the connecting piece and positioned between the coil and the magnetic piece.

So, press the subassembly through setting up the stop part, avoid the coil when letting in alternating voltage with magnetic part direct adsorption contact, prevent magnetic part and coil direct contact and damage the coil to the influence presses the subassembly and applys the accuracy of different pressures.

In some embodiments, the base comprises:

the base plate is provided with a first through hole, and the central axis of the first through hole extends along a first direction;

the mounting piece is arranged on one side, close to the pressing component, of the base plate, the second through hole is formed in the mounting piece, the central axis of the second through hole is coaxial with the central axis of the first through hole, the piezoelectric motor is placed on one side, away from the base plate, of the mounting piece, the piezoelectric motor covers the second through hole, and the first direction is parallel to the direction of the pressing component pressing the piezoelectric motor.

So, the base has the base plate of first through-hole and the installed part that has the second through-hole through the setting, is convenient for gather the subassembly and directly gathers the produced vibration performance parameter of piezoelectric motor through first through-hole and second through-hole, is favorable to guaranteeing the accuracy of the vibration performance parameter of gathering.

In some embodiments, the base further comprises:

and the fastening piece is arranged on the mounting piece and used for fastening the piezoelectric motor and the mounting piece.

So, through the fastener with piezoelectric motor fastening and installed part, when preventing to press the subassembly to exert pressure in piezoelectric motor, the piezoelectric motor atress and produce the displacement, the vibration performance parameter of the specific region of piezoelectric motor is gathered in the influence.

In some embodiments, the second through-hole is a counterbore, the piezoelectric motor being placed in the second through-hole;

a first avoidance groove is formed in one side, away from the substrate, of the mounting piece and used for avoiding the pressing assembly so that the pressing assembly can apply pressure on the piezoelectric motor placed in the second through hole;

the installed part deviates from one side of base plate still is equipped with the second and dodges the groove, the second dodges the groove and extends the setting along the second direction, the second dodges the groove and is used for dodging piezoelectric motor's winding displacement so that piezoelectric motor's winding displacement is placed in the installed part, the second direction with first direction is mutually perpendicular, first dodge the groove the second dodge the groove with communicate each other between the second through-hole.

Therefore, the second through hole is set to be the counter bore, so that the piezoelectric motor is placed conveniently, and the piezoelectric motor is prevented from protruding out of the mounting piece; the mounting piece is provided with the first avoidance groove, so that the pressing component is prevented from interfering with the mounting piece when applying pressure to the piezoelectric motor, and the piezoelectric motor cannot be accurately pressed; the groove is dodged through setting up the second to the installed part, avoids piezoelectric motor and/or piezoelectric motor's winding displacement protrusion in installed part to the influence is pressed the subassembly and is directly exerted pressure in piezoelectric motor.

In some embodiments, the test device further comprises:

the frame, the base press the subassembly and the collection subassembly is all located the frame, just the base is located press the subassembly with gather between the subassembly.

So, testing arrangement is favorable to being in the same place base, pressing the subassembly and gathering the subassembly integration through setting up the frame, makes things convenient for testing arrangement's use.

In some embodiments, the test device further comprises:

the first driving module is arranged on the rack and connected with the pressing component, and is used for driving the pressing component to move within a preset range;

the second driving module is arranged on the rack and connected with the acquisition assembly, and the second driving module is used for driving the acquisition assembly to move within a preset range.

Therefore, the first driving module drives the pressing component to move within the preset range, the pressing component can apply pressure to any area of the piezoelectric motor, the second driving module drives the collecting component to move within the preset range, and the collecting component can move corresponding to the pressing component so as to collect the vibration performance parameters generated by the area, to which the pressure is applied, of the piezoelectric motor.

An embodiment of the present application further provides a testing system, configured to test vibration performance parameters of a piezoelectric motor, including:

a test device as described above; and

and the processor is connected with the testing device.

The testing system controls the testing device through the processor, so that the testing device applies different pressures to the piezoelectric motors placed on the base at different moments through the pressing assemblies, the piezoelectric motors are electrified with excitation voltage to generate vibration, and the vibration performance parameters generated when the piezoelectric motors are applied with the different pressures are collected through the collecting assemblies, so that the vibration performance parameters of the piezoelectric motors can be tested under different pressures. The piezoelectric motor can also generate different vibration performance parameters by introducing different excitation voltages under the same pressure so as to be collected by the collecting assembly, and the testing device can also realize that the collecting assembly can continuously collect the vibration performance parameters of the piezoelectric motor under different excitation voltages in sections under variable pressure, thereby shortening the testing procedure of the piezoelectric motor, saving the detection time and reducing the production cost.

In some embodiments, the test system further comprises:

and the memory is connected with the testing device and the processor and is used for storing the vibration performance parameters of the piezoelectric motor, which are acquired by the testing device.

Therefore, the vibration performance parameters of the piezoelectric motor collected by the testing device are stored by the memory, and the collected vibration performance parameters of the piezoelectric motor are favorably utilized.

Drawings

Fig. 1 is a schematic structural diagram of a testing apparatus according to a first embodiment of the present application.

Fig. 2 is a schematic perspective view of a base in a testing device according to a first embodiment of the present disclosure.

Fig. 3 is a hardware architecture diagram of a test system according to a second embodiment of the present application.

Description of the main elements

Test apparatus 100

Base 10

Substrate 12

First through hole 122

Mounting member 14

Second through hole 142

Recess 1422

Through hole 1424

First avoidance groove 144

Second avoidance groove 146

Fastener 16

Pressing assembly 20

Connecting piece 22

Coil 24

Magnetic member 26

Stop 28

Collection assembly 30

Laser beam 32

Frame 40

First driving module 50

Second driving module 60

Test system 200

Processor 202

Memory 204

Piezoelectric motor 300

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means three or more unless specifically defined otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a testing apparatus according to a first embodiment of the present disclosure, which provides a testing apparatus 100 for testing vibration performance parameters of a piezoelectric motor 300. The testing device 100 includes a base 10, a pressing assembly 20, and a collecting assembly 30.

The base 10 is used to carry a piezoelectric motor 300 to be tested for vibration performance parameters.

The pressing member 20 is disposed on one side of the base 10, and the pressing member 20 is used for applying different pressures to the piezoelectric motor 300 to be tested at different times.

The collection assembly 30 is disposed on a side of the base 10 facing away from the pressing assembly 20, and is used for collecting a vibration performance parameter generated by the piezoelectric motor 300 when the piezoelectric motor 300 is pressed by the pressing assembly 20.

The testing device 100 applies different pressures to the piezoelectric motor 300 placed on the base 10 at different times through the pressing component 20, the piezoelectric motor 300 is excited by excitation voltage to generate vibration, and the vibration performance parameters generated when the piezoelectric motor 300 is applied with the different pressures are collected through the collecting component 30, so that the testing device 100 realizes the testing of the vibration performance parameters of the piezoelectric motor 300 under different pressures. The piezoelectric motor 300 can also generate different vibration performance parameters by introducing different excitation voltages under the same pressure so as to be acquired by the acquisition assembly 30, and the test device 100 can also realize that the acquisition assembly 30 can continuously acquire the vibration performance parameters of the piezoelectric motor 300 under different excitation voltages in a segmented manner under variable pressure, thereby shortening the test procedure of the vibration performance parameters of the piezoelectric motor 300, saving the detection time and reducing the generation cost.

The vibration performance parameters of the piezoelectric motor 300 include amplitude, acceleration, on-off time, and the like that reflect the mechanical performance of the piezoelectric motor 300. The piezoelectric motor 300 is a substantially sheet-shaped structure, and the piezoelectric motor 300 includes a ceramic surface and a reinforcing steel surface, wherein the reinforcing steel surface of the piezoelectric motor 300 is used for the pressed component 20 to apply pressure, and the ceramic surface is used for the collecting component 30 to collect vibration performance parameters of the piezoelectric motor 300.

In one embodiment, the testing device 100 further includes a frame 40, the frame 40 is disposed along a substantially horizontal direction, the base 10, the pressing assembly 20 and the collecting assembly 30 are disposed on the frame 40, and the base 10 is disposed between the pressing assembly 20 and the collecting assembly 30. In this way, it is beneficial for the pressing component 20 to apply different pressures to the piezoelectric motor 300 on the side of the base 10, and the collecting component 30 collects the vibration parameters generated by the piezoelectric motor 300 after the excitation voltage is applied on the side of the base 10 away from the pressing component 20. The horizontal direction is perpendicular to gravity, and the horizontal direction is the X axis shown in fig. 1.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a base 10 of a testing apparatus 100 according to a first embodiment of the present disclosure, in which the base 10 includes a substrate 12 and a mounting member 14.

The substrate 12 is substantially a plate-shaped structure, the substrate 12 is provided with a first through hole 122, that is, the substrate 12 is a hollow structure, a central axis of the first through hole 122 extends along a first direction, the substrate 12 is provided on the rack 40 along a third direction, and the first direction is perpendicular to the third direction. Wherein the first direction is the X-axis shown in fig. 2, and the third direction is the Z-axis shown in fig. 2. The X-axis shown in fig. 2 represents the same direction as the X-axis shown in fig. 1.

The mounting member 14 is disposed on a side of the substrate 12 close to the pressing member 20, the mounting member 14 is substantially plate-shaped, and the mounting member 14 is provided with a second through hole 142, i.e., the mounting member 14 is also hollow. The central axis of the second through hole 142 is arranged coaxially with the central axis of the first through hole 122, i.e., the central axis of the second through hole 142 also extends in the first direction. The piezoelectric motor 300 can be disposed on a side of the mounting member 14 facing away from the substrate 12, that is, the piezoelectric motor 300 is disposed on a side of the mounting member 14 close to the pressing member 20, and the piezoelectric motor 300 covers the second through hole 142, and the first direction is parallel to a direction in which the pressing member 20 presses the piezoelectric motor 300.

The mounting part 14 is made of teflon, the mounting part 14 made of teflon has a low friction coefficient, the piezoelectric motor 300 is conveniently placed at the second through hole 142, the mounting part 14 is wear-resistant, dust is not easily stained, and the mounting part is easy to clean.

The second through hole 142 is a counter bore, and after the piezoelectric motor 300 is disposed in the second through hole 142, a surface (a reinforcing steel sheet surface) of the piezoelectric motor 300 close to the pressing component 20 and a surface of the mounting component 14 close to the pressing component 20 are located on the same plane, so as to prevent the piezoelectric motor 300 from protruding out of the surface of the mounting component 14. Meanwhile, the piezoelectric motor 300 is positioned and placed conveniently.

The second through hole 142 has a recess 1422 and a through hole 1424, and the recess 1422 is disposed at two ends of the through hole 1424 along the Z-axis direction. When the piezoelectric motor 300 is disposed in the second through hole 142, two sides of the piezoelectric motor 300 are disposed in the recessed portions 1422, respectively, so that a surface (reinforcing steel sheet surface) of the piezoelectric motor 300 close to the pressing member 20 and a surface of the mounting member 14 close to the pressing member 20 are located on the same plane.

It is understood that in other embodiments, the cross-sectional area of the second through-hole 142 in the first direction may be equal.

One side of the mounting member 14 away from the substrate 12 is provided with a first avoiding groove 144, the first avoiding groove 144 is communicated with the second through hole 142, the first avoiding groove 144 is a substantially circular groove, the first avoiding groove 144 is communicated with the second through hole 142, and the first avoiding groove 144 is used for avoiding the pressing member 20 so as to avoid interference with the surface (reinforcing steel sheet surface) of the mounting member 14 when the pressing member 20 presses the piezoelectric motor 300, thereby causing the pressing member 20 not to accurately press the piezoelectric motor 300. In the X-axis direction, the bottom surface of the first escape groove 144 is lower than the surface of the mounting member 14 near the pressing member 20. In the Y-axis direction, the diameter of the first avoiding groove 144 is larger than the width of the second through hole 142, which facilitates the pressing assembly 20 to completely apply the pressure to the piezoelectric motor 300.

When the piezoelectric motor 300 is used for testing the vibration performance parameters, the piezoelectric motor 300 is assembled with an excitation voltage input flat cable (not shown), correspondingly, a second avoiding groove 146 extending along the second direction is further disposed on one side of the mounting member 14 away from the substrate 12, the second avoiding groove 146, the first avoiding groove 144 and the second through hole 142 are communicated with each other, the second avoiding groove 146 is used for placing the flat cable, the flat cable is prevented from protruding out of the piezoelectric motor 300, and the pressing component 20 is influenced to directly apply pressure to the piezoelectric motor 300. Wherein the second direction is perpendicular to the first direction, and the second direction is the Y-axis shown in fig. 2. Along the X-axis direction, the bottom surface of the second avoiding groove 146 is lower than the bottom surface of the first avoiding groove 144, so as to avoid interference with the flat cable of the piezoelectric motor 300 when the pressing element 20 presses the piezoelectric motor 300.

The base 10 formed by the substrate 12 and the mounting member 14 has the first through hole 122 and the second through hole 142 which are communicated with each other, the piezoelectric motor 300 covers the second through hole 142, and when the pressing assembly 20 applies different pressures to the piezoelectric motor 300, the vibration performance parameters of the piezoelectric motor 300 can be directly acquired by the acquisition assembly 30 through the first through hole 122 and the second through hole 142 which are communicated with each other, so that the vibration performance parameters are prevented from being blocked by other components and the accuracy of the acquisition of the vibration performance parameters is prevented from being influenced.

In one embodiment, the base 10 further includes a fastener 16, the fastener 16 being disposed on the mount 14 for fastening the piezo motor 300 to the mount 14. The number of the fastening members 16 is two, and the two fastening members are respectively provided on both sides of the mounting member 14, for fixing both ends of the piezoelectric motor 300 to the mounting member 14. The fastener 16 may be fixedly coupled to the mounting member 14 by a bolt to secure the piezoelectric motor 300 to the mounting member 14.

With continued reference to fig. 1, the testing apparatus 100 further includes a first driving module 50 and a second driving module 60.

The first driving module 50 is disposed on the frame 40 and connected to the pressing member 20, and the first driving module 50 is used for driving the pressing member 20 to move within a predetermined range. The first driving module 50 may be a three-axis linear module to drive the pressing member 20 to move in three directions, i.e., X-axis, Y-axis, and Z-axis, as shown in fig. 1.

It is understood that the first driving module 50 can also be a robot, or the first driving module 50 can be a single-axis linear module, or the first driving module 50 can be a double-axis linear module.

The second driving module 60 is disposed on the frame 40 and connected to the collecting assembly 30, the second driving module 60 is used for driving the collecting assembly 30 to move within a preset range, and the movement of the collecting assembly 30 is matched with the movement of the pressing assembly 20, so that the collecting assembly 30 collects vibration performance parameters generated by the area where the piezoelectric motor 300 is pressed. The second driving module 60 may be a three-axis linear module to drive the collecting assembly 30 to move in three directions, i.e. X-axis, Y-axis, and Z-axis, as shown in fig. 1.

It is understood that the second driving module 60 may also be a robot arm, a single axis linear module, or a dual axis linear module.

The pressing assembly 20 includes a connector 22, a coil 24, and a magnetic member 26.

The connecting member 22 is substantially cylindrical, the connecting member 22 is disposed on one side of the base 10 and extends along a first direction, one end of the connecting member 22 is connected to the first driving module 50, the other end of the connecting member 22 is disposed opposite to the base 10 (the reinforcing steel sheet surface of the piezoelectric motor 300), and the first direction is parallel to the direction in which the pressing assembly 20 presses the piezoelectric motor 300. Wherein the first direction is a horizontal direction, and the first direction and the horizontal direction are shown as an X-axis in FIG. 1. The connecting member 22 is disposed along the horizontal direction, so that the pressing member 20 can apply pressure to the piezoelectric motor 300 along the horizontal direction, interference of the self weight of the pressing member 20 on the piezoelectric motor 300 is avoided, and the testing accuracy of the testing apparatus 100 is improved.

It is understood that in other embodiments, the connector 22 may also be polygonal or elliptical-cylindrical.

The coil 24 is fixedly sleeved on the connecting member 22, the coil 24 can generate a magnetic force when alternating voltage is applied, and the magnetic force generated by the coil 24 can be changed when alternating voltage with at least one of different magnitude and direction is applied to the coil 24.

The magnetic member 26 is substantially a cylinder with one closed end, and is slidably disposed at one end of the connecting member 22 close to the base 10, the magnetic member 26 may be a magnet, and when an ac voltage with at least one of a different magnitude and a different direction is applied to the coil 24, the magnetic force between the magnetic member 26 and the coil 24 is changed, that is, the magnetic force between the coil 24 and the magnetic member 26 is controlled by the ac voltage applied to the coil 24, for example, the attractive force generated between the magnetic member 26 and the coil 24 is increased or decreased, or the repulsive force generated between the magnetic member 26 and the coil 24 is increased or decreased. The magnetic member 26 is slidably sleeved on the connecting member 22, however, the magnetic member 26 is restricted by the connecting member 22 and cannot be separated from the connecting member 22.

The magnetic member 26 has a size smaller than that of the first escape groove 144.

It will be appreciated that in other embodiments, the magnetic member 26 may also be a polygonal cylinder or an elliptical cylinder adapted to the connector 22.

In one embodiment, the pressing assembly 20 further includes a stopper 28.

The stopper 28 is substantially an annular structure, the stopper 28 is fixedly sleeved on the connecting member 22, and the stopper 28 is located between the coil 24 and the magnetic member 26, so as to prevent the coil 24 from being directly attracted to and contacting the magnetic member 26 when an ac voltage is applied, prevent the magnetic member 26 from being directly contacted with the coil 24 to damage the coil 24, and avoid affecting the accuracy of the pressing assembly 20 for applying a pressure to the piezoelectric motor 300.

It will be appreciated that in other embodiments, the stop 28 may be a block structure, the number of stops 28 may be one or more, and one or more block structures of the stop 28 may be provided on the outer side of the connecting member 22.

Gather subassembly 30 and adopt the laser vibrometer, the laser beam 32 accessible that the laser vibrometer sent directly shines to one side that piezoelectric motor 300 deviates from pressing component 20 through first through-hole 122 and second through-hole 142, and laser beam 32 shines to the ceramic face of piezoelectric motor 300 promptly, is favorable to accurate collection piezoelectric motor 300's vibration performance parameter.

It is understood that in other embodiments, the collection assembly 30 may be other instruments capable of measuring vibration, such as a vibration measuring instrument, and may directly contact the side of the piezoelectric motor 300 facing away from the pressing assembly 20 through the first through hole 122 and the second through hole 142.

In one embodiment, the implementation process of the testing apparatus 100 is as follows: the piezoelectric motor 300 is placed in the second through hole 142 of the base 10 and fixed by the fastener 16, and the excitation voltage input cable of the piezoelectric motor 300 is placed in the second avoiding groove 146. The first driving module 50 drives the pressing component 20 to face the piezoelectric motor 300, and the second driving module 60 drives the collecting component 30 to be arranged opposite to the pressing component 20, that is, the laser beam 32 emitted by the laser vibration meter faces the magnetic part 26 of the pressing component 20.

The coil 24 is energized with the ac voltage V1, the coil 24 generates an attraction force and attracts the magnetic element 26, the magnetic element 26 moves toward the coil 24 under the attraction force of the coil 24 and stops at the stop 28, the pressing assembly 20 does not apply a load to the piezoelectric motor 300, and the piezoelectric motor 300 is unloaded, which is denoted as F1. Inputting an excitation voltage Vpp1 to the piezoelectric motor 300 through an excitation voltage input bus, wherein the Vpp1 may be a combined drive waveform Vpp1@ F1, Vpp1@ F2, Vpp1@ F3, the piezoelectric motor 300 generates vibration, and the acquisition component 30 (laser vibrometer) acquires vibration performance parameters of the piezoelectric motor 300 and records the parameters as [ F1, App-F1@ Vpp1@ F1-up & mid & down ], [ F1, App-F1@ Vpp1@ F2-up & mid & down ], and [ F1, App-F1@ Vpp 1F 3-up & mid & down ]. Wherein App-F1@ Vpp1@ F1-up & mid & down represents the amplitude produced by the piezo motor 300 with a pressure of F1 and a drive waveform of Vpp1@ F1.

In the case of a pressure of F1, an excitation voltage Vpp2 is input to the piezoelectric motor 300 through an excitation voltage input bus, Vpp2 may be a combined drive waveform Vpp2@ F1, Vpp2@ F2, Vpp2@ F3, the piezoelectric motor 300 generates vibration, and the acquisition component 30 (laser vibrometer) acquires vibration performance parameters of the piezoelectric motor 300 and records them as [ F1, App-F1@ Vpp2@ F1-up & mid & down ], [ F1, App-F1@ Vpp2@ F2-up & mid & down ], and [ F1, App-F1@ Vpp2@ F3-up & mid & down ]. In this way, the amplitude generated by the piezoelectric motor 300 when different excitation voltages (Vpp1 and Vpp2) are input to the piezoelectric motor 300 under the pressure F1 can be collected.

The coil 24 is energized with the ac voltage V2, the coil 24 generates a repulsive force and repels the magnetic member 26, the magnetic member 26 moves toward the piezoelectric motor 300 under the repulsive force of the coil 24, and applies a pressure F2 to the piezoelectric motor 300. The piezoelectric motor 300 generates vibration by inputting an excitation voltage Vpp1 to the piezoelectric motor 300 through an excitation voltage input bus, and the pickup assembly 30 picks up vibration performance parameters of the piezoelectric motor 300 and records them as [ F2, App-F2@ Vpp1@ F1-up & mid & down ], [ F2, App-F2@ Vpp1@ F2-up & mid & down ], and [ F2, App-F2@ Vpp1@ F3-up & mid & down ].

In the case of a pressure of F2, an excitation voltage Vpp2 is input to the piezoelectric motor 300 through an excitation voltage input cable, the piezoelectric motor 300 generates vibration, and the pickup assembly 30 picks up vibration performance parameters of the piezoelectric motor 300 and records as [ F2, App-F2@ Vpp2@ F1-up & mid & down ], [ F2, App-F2@ Vpp2@ F2-up & mid & down ], and [ F2, App-F2@ Vpp2@ F3-up & mid & down ]. In this way, the amplitude generated by the piezoelectric motor 300 when different excitation voltages (Vpp1 and Vpp2) are input to the piezoelectric motor 300 under the pressure F2 can be collected.

The coil 24 is supplied with an alternating voltage V3, the pressing assembly 20 can apply a pressure F3 to the piezoelectric motor 300, the above process is repeated, and vibration performance parameters generated by the piezoelectric motor 300 when different excitation voltages (Vpp1 and Vpp2) are input to the piezoelectric motor 300 under the condition that the pressure is F3 can be collected and recorded as [ F3, App-F3@ Vpp1@ 1-up & mid & down ], [ F3, App-F3@ Vpp1@ F2-up & mid & down ], [ F2, App-F2 Vpp2@ 2-up & mid & down ], [ F2, App-F2@ Vpp 2F @ 2-up & mid & down ], [ F2, App-F2@ Vpp 2F @ 2-up & mid & down ], [ F2@ Vpp @ 2-up & mid & down ], [ F @ 2@ Vpp @ 2-up & mid & down ], [ F @ 2 & mid & up & mid & down ], [ F @ 2 & p @ 2 & mid & p @ 2 & mid & p @ 2 & p.

By repeating the above implementation process, the amplitude generated by the piezoelectric motor 300 when different excitation voltages are input under the condition that the pressure of the piezoelectric motor 300 is Fn can be collected.

It will be appreciated that the stimulus voltages may also include Vpp3, Vpp4 … … Vppn, where n is a natural number.

It should be noted that the operating frequency range of the driving waveform in the excitation voltage satisfies the following relation: 10Hz < f1< fn <500Hz, the operating voltage range satisfying the following relation: 5V < Vpp1< Vppn < 200V.

Referring to fig. 3, fig. 3 is a hardware architecture diagram of a test system according to a second embodiment of the present application, which provides a test system 200 according to the second embodiment of the present application. The testing system 200 includes a processor 202 and the testing apparatus 100 of the first embodiment, and the processor 202 is connected to the testing apparatus 100.

The testing system 200 controls the testing device 100 through the processor 202, so that the testing device 100 applies different pressures to the piezoelectric motor 300 placed on the base 10 at different times through the pressing component 20, the piezoelectric motor 300 is excited by excitation voltage to generate vibration, and the vibration performance parameters generated when the piezoelectric motor 300 is applied with different pressures are collected through the collecting component 30, and the testing system 200 realizes testing of the vibration performance parameters of the piezoelectric motor 300 under different pressures. The piezoelectric motor 300 can also generate different vibration performance parameters by introducing different excitation voltages under the same pressure so as to be acquired by the acquisition assembly 30, and the test system 200 can also realize that the acquisition assembly 30 can continuously acquire the vibration performance parameters of the piezoelectric motor 300 under different excitation voltages in a segmented manner under variable pressure, thereby shortening the test procedure of the vibration performance parameters of the piezoelectric motor 300, saving the detection time and reducing the generation cost.

The processor 202 is used for controlling the testing apparatus 100, inputting different ac voltages to the coil 24, inputting signals to the collecting assembly 30, the first driving module 50 and the second driving module 60, and inputting different excitation voltages to the piezoelectric motor 300.

The Processor 202 may be a computer, and may also be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 202 is the control center of the test system 200 and connects the various parts of the overall test system 200 using various interfaces and lines.

In one embodiment, the testing system 200 further includes a memory 204, the memory 204 is connected to the testing device 100 and the processor 202, and the memory 204 is used for storing the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30.

The memory 204 is connected to the collection assembly 30 and is used for storing the vibration performance parameters of the piezoelectric motor 300 collected by the collection assembly 30. Target parameters reflecting the mechanical performance of piezo motor 300 may also be stored in memory 204, memory 204 is coupled to processor 202, and processor 202 may recall the target parameters stored in memory 204 for comparison with the vibration performance parameters of piezo motor 300 acquired by acquisition assembly 30.

The memory 204 is used for storing various types of data in the test system 200, such as various databases, program code, and the like. In this embodiment, the Memory 204 may include, but is not limited to, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM), or any other optical Disc Memory, magnetic disk Memory, tape Memory, or any other medium readable by a computer that can be used to carry or store data.

In one embodiment, the test system 200 is implemented as: the piezoelectric motor 300 is placed in the second through hole 142 of the base 10 and fixed by the fastener 16, and the excitation voltage input cable of the piezoelectric motor 300 is placed in the second avoiding groove 146. The processor 202 controls the first driving module 50 to drive the pressing component 20 to face the piezoelectric motor 300, and the processor 202 controls the second driving module 60 to drive the collecting component 30 to move to be opposite to the pressing component 20.

The processor 202 controls the input of the ac voltage V1 to the coil 24, the coil 24 generates an attraction force and attracts the magnetic element 26, the magnetic element 26 moves toward the coil 24 under the attraction force of the coil 24 and stops at the stop 28, the pressing assembly 20 does not apply a load to the piezoelectric motor 300, and the piezoelectric motor 300 is unloaded, which is denoted as F1. The processor 202 controls the piezoelectric motor 300 to input excitation voltages Vpp1 and Vpp2 respectively, the piezoelectric motor 300 generates vibration accordingly, the processor 202 controls the acquisition assembly 30 to acquire and record vibration performance parameters of the piezoelectric motor 300, the processor 202 calls the target parameters in the memory 204 and compares the target parameters with the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30, and meanwhile, the processor 202 stores the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30 in the memory 204.

Processor 202 controls input of ac voltage V2 to coil 24, coil 24 generates repulsive force and repels magnetic element 26, magnetic element 26 moves toward piezoelectric motor 300 under repulsive force of coil 24, and applies pressure F2 to piezoelectric motor 300. The processor 202 controls the piezoelectric motor 300 to input excitation voltages Vpp1 and Vpp2 respectively, the piezoelectric motor 300 generates vibration accordingly, the processor 202 controls the acquisition assembly 30 to acquire and record vibration performance parameters of the piezoelectric motor 300, the processor 202 calls the target parameters in the memory 204 and compares the target parameters with the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30, and meanwhile, the processor 202 stores the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30 in the memory 204.

In the case of the pressure F2, the processor 202 controls the input of the ac voltage V3 to the coil 24, the repulsive force between the coil 24 and the magnetic member 26 changes, and the pressure applied by the magnetic member 26 to the piezoelectric motor 300 becomes F3. The processor 202 controls the piezoelectric motor 300 to input excitation voltages Vpp1 and Vpp2 respectively, the piezoelectric motor 300 generates vibration accordingly, the processor 202 controls the acquisition assembly 30 to acquire and record vibration performance parameters of the piezoelectric motor 300, the processor 202 calls the target parameters in the memory 204 and compares the target parameters with the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30, and meanwhile, the processor 202 stores the vibration performance parameters of the piezoelectric motor 300 acquired by the acquisition assembly 30 in the memory 204.

By repeating the implementation process, the vibration performance parameters generated by the piezoelectric motor 300 when different excitation voltages (Vpp1 and Vpp2) are input under the condition that the pressure of the piezoelectric motor 300 is Fn can be collected. Thus, in the above implementation process, the pressing element 20 can continuously apply different pressures to the piezoelectric motor 300, and the pressing element 20 does not need to be separated from the surface of the piezoelectric motor 300 close to the pressing element 20, thereby saving the testing time.

It is understood that in other implementations, after collecting the vibration performance parameters generated by the piezoelectric motor 300 under the condition of the pressure F2, the processor 202 may also apply the ac voltage V1 to the coil 24 to return the magnetic element 26 to the stop 28. The processor 202 then applies an ac voltage V3 to the coil 24 to apply a force F3 to the piezoelectric motor 300 by the pressing element 20. In this way, the vibration performance parameters of the piezoelectric motor 300 generated by inputting different excitation voltages under the condition that the pressure of the piezoelectric motor 300 is Fn are collected in a circulating manner.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims (10)

1. A test apparatus for testing vibration performance parameters of a piezoelectric motor, comprising:

the base is used for bearing the piezoelectric motor to be tested;

the pressing component is arranged on one side of the base and used for applying different pressures to the piezoelectric motor to be tested at different moments; and

the acquisition assembly is arranged on one side, deviating from the pressing assembly, of the base and used for acquiring vibration performance parameters generated by the piezoelectric motor when the piezoelectric motor is pressed.

2. The testing device of claim 1, wherein the pressing assembly comprises:

the connecting piece is arranged on one side of the base and extends along a first direction, and the first direction is parallel to the direction in which the pressing component applies pressure to the piezoelectric motor;

the coil is sleeved on the connecting piece; and

the magnetic part is arranged at one end, close to the base, of the connecting part in a sliding mode, and the change of the magnetic force between the coil and the magnetic part is controlled by the alternating voltage in the coil.

3. The testing device of claim 2, wherein the pressing assembly further comprises:

and the stop piece is arranged on the connecting piece and positioned between the coil and the magnetic piece.

4. The testing device of claim 1, wherein the base comprises:

the base plate is provided with a first through hole, and the central axis of the first through hole extends along a first direction;

the mounting piece is arranged on one side, close to the pressing component, of the base plate, the second through hole is formed in the mounting piece, the central axis of the second through hole is coaxial with the central axis of the first through hole, the piezoelectric motor is placed on one side, away from the base plate, of the mounting piece, the piezoelectric motor covers the second through hole, and the first direction is parallel to the direction of the pressing component pressing the piezoelectric motor.

5. The testing device of claim 4, wherein the base further comprises:

and the fastener is arranged on the mounting piece and used for fastening the piezoelectric motor to the mounting piece.

6. The testing device of claim 4 or 5, wherein the second through-hole is a counterbore, the piezoelectric motor being placed in the second through-hole;

a first avoidance groove is formed in one side, away from the substrate, of the mounting piece and used for avoiding the pressing assembly so that the pressing assembly can apply pressure on the piezoelectric motor placed in the second through hole;

the installed part deviates from one side of base plate still is equipped with the second and dodges the groove, the second dodges the groove and extends the setting along the second direction, the second dodges the groove and is used for dodging piezoelectric motor's winding displacement so that piezoelectric motor's winding displacement is placed in the installed part, the second direction with first direction is mutually perpendicular, first dodge the groove the second dodge the groove with communicate each other between the second through-hole.

7. The test apparatus of claim 1, wherein the test apparatus further comprises:

the frame, the base press the subassembly and the collection subassembly is all located the frame, just the base is located press the subassembly with gather between the subassembly.

8. The test apparatus of claim 7, wherein the test apparatus further comprises:

the first driving module is arranged on the rack and connected with the pressing component, and is used for driving the pressing component to move within a preset range;

the second driving module is arranged on the rack and connected with the acquisition assembly, and the second driving module is used for driving the acquisition assembly to move within a preset range.

9. A test system for testing vibration performance parameters of a piezoelectric motor, comprising:

the test device of any one of claims 1-8; and

and the processor is connected with the testing device.

10. The test system of claim 9, further comprising:

and the memory is connected with the testing device and the processor and is used for storing the vibration performance parameters of the piezoelectric motor, which are acquired by the testing device.

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