A parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and its excitation method

An actuation mechanism and piezoelectric resonance technology, which is applied to piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as slow speed and small driving force

Active Publication Date: 2022-07-26
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the non-resonant excitation method is that it has nanometer-level high precision, but the disadvantage is that the driving force is small and the speed is slow

Method used

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  • A parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and its excitation method
  • A parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and its excitation method
  • A parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and its excitation method

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specific Embodiment approach 1

[0015] Specific implementation mode 1. Combination Figure 1-Figure 3 Illustrating this specific embodiment, the parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism described in this embodiment includes four cylindrical piezoelectric transducers 1 , 2 , 3 and 4 with identical structures and four common ones. Connecting beam 5, four driving beams 6,

[0016] The structures of the cylindrical piezoelectric transducers 1, 2, 3 and 4 are all the same. The cylindrical piezoelectric transducer 1 is used as an example for illustration. The components included in the cylindrical piezoelectric transducer 1 include a Screw 7-1, an end post 8-1, a connection plate 9, two piezoelectric ceramic components 10-1, 10-2, a ground electrode piece 11 and a driving end post 12, wherein the connection plate 9 and the driving end post 12 are the common parts of the four cylindrical piezoelectric transducers. refer to figure 1 , the four connecting beams 5 are actual...

specific Embodiment approach 2

[0020] Specific embodiment 2. The difference between this embodiment and the parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism described in specific embodiment 1 is that it provides a four-phase phase difference with a phase difference of π / 2 for the columnar piezoelectric transducer. Periodic sinusoidal voltage signal V a , V b , V c , V d , the four-phase voltage signal can be V a =V m sin(ωt), V b =V m sin(ωt+π / 2), V c =V m sin(ωt+π), V d =V m sin(ωt+3π / 2), where V m It represents the amplitude of the voltage signal, and the frequency ω of the voltage signal is close to or consistent with the natural frequency of the first-order longitudinal vibration of the cylindrical piezoelectric transducer to be excited.

[0021] In this embodiment, set the working plane: first set the Cartesian Cartesian coordinate system, the three axes are x, y, z respectively, o is the origin of the coordinate system, the xoy plane is selected as the horiz...

specific Embodiment approach 3

[0025] Embodiment 3. The difference between this embodiment and the parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism described in Embodiment 1 is that each piezoelectric ceramic sheet is composed of a piezoelectric body and a pair of electrode coatings , the two coatings that make up this pair of electrode coatings are located on the two-sided square surfaces of the piezoelectric body, respectively.

[0026] The piezoelectric body described in this embodiment is formed of lead zirconate titanate piezoelectric ceramics, but is not limited to lead zirconate titanate piezoelectric ceramics, and may also be formed of other piezoelectric materials such as polyvinylidene fluoride and aluminum nitride. Piezoelectric. The electrode coating is realized by suitable metal material coating such as Al, Cu, Ag, Ag-Pd alloy, etc. arranged on the surface of the piezoelectric ceramic sheet.

[0027] Specific embodiment four, combination figure 1 Describing th...

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Abstract

The invention relates to a parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and an excitation method thereof, belonging to the field of piezoelectric driving, and can be used in the fields of precision driving, medical treatment, micro-mechanics and the like. The present invention aims to solve the problems of small output force, high cost and insufficient actuation capability of the existing three-degree-of-freedom piezoelectric self-actuating device. The three-degree-of-freedom piezoelectric resonance self-actuating mechanism of the present invention is a parallel combination structure of transducers, and the electric resonance self-actuating mechanism includes four cylindrical piezoelectric transducers with identical structures and their connecting devices. The drive mechanism includes four drive feet for combined actuation. The excitation method of the self-actuating mechanism according to the present invention is to excite the longitudinal vibrations of the four columnar piezoelectric transducers with time-series respectively through two-phase or four-phase voltage excitation signals according to the mode of translational or rotational motion to form a combined longitudinal vibration. Vibrate, drive the driving foot to move, and realize its three-degree-of-freedom actuation function on the working plane.

Description

technical field [0001] The invention relates to a parallel three-degree-of-freedom piezoelectric resonance self-actuating mechanism and an excitation method thereof, and in more detail, to a piezoelectric resonance self-actuating mechanism with four identical cylindrical piezoelectric transducers and their connecting mechanism The piezoelectric resonance self-actuating mechanism can realize its three-degree-of-freedom actuating function on a plane by using the excitation method thereof, and the invention belongs to the technical field of piezoelectric driving. Background technique [0002] The piezoelectric self-actuating mechanism converts the electrical energy into the vibration energy of the vibrating body by using the inverse piezoelectric effect of the piezoelectric material, and converts the vibration energy into the motion energy of the self-actuating mechanism body through the contact friction between the driving foot and the working surface. Realize linear or rotary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
CPCH02N2/0095H02N2/0075H02N2/008H02N2/005
Inventor 周详宇余桑魏博汪从哲杨德伟
Owner CHONGQING UNIV OF POSTS & TELECOMM
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