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Frame type three-degree-of-freedom piezoelectric resonance self-actuating mechanism and excitation method thereof

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

Pending Publication Date: 2021-01-12
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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  • Frame type three-degree-of-freedom piezoelectric resonance self-actuating mechanism and excitation method thereof
  • Frame type three-degree-of-freedom piezoelectric resonance self-actuating mechanism and excitation method thereof
  • Frame type three-degree-of-freedom piezoelectric resonance self-actuating mechanism and excitation method thereof

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specific Embodiment approach 1

[0015] Specific implementation mode 1. Combination Figure 1-Figure 3 To illustrate this specific embodiment, the frame-type three-degree-of-freedom piezoelectric resonant self-actuating mechanism described in this embodiment includes four sets of series-type columnar piezoelectric transducers 1, 2, 3 and 4 with identical structures and their shared connecting beams 5, 6, 7 and 8,

[0016] The structure of the series-type columnar piezoelectric transducer can be illustrated by taking the series-type columnar piezoelectric transducer 1 as an example, and the components included in the series-type columnar piezoelectric transducer 1 have two identical screws for fixing 1-1-1, 1-2-1, two end columns with the same structure 1-1-2, 1-2-2, four sets of piezoelectric ceramic components 1-1-3, 1-1-4, 1 -2-3, 1-2-4, two connecting beams 5, 8 and the middle beam 1-1-5, wherein the connecting beam 5 is a common part of two sets of serial columnar piezoelectric transducers 1 and 2, conne...

specific Embodiment approach 2

[0020] Specific Embodiment 2. The difference between this embodiment and the frame-type three-degree-of-freedom piezoelectric resonant self-actuating mechanism described in Specific Embodiment 1 is that two phases with a phase difference of π / 2 are provided for the columnar voltage conversion electric energy device. Periodic sinusoidal voltage signal V a , V b , the two-phase voltage signals can be V a =V m sin(ωt), V b =V m sin(ωt+π / 2), where V m Indicates the amplitude of the voltage signal, and the frequency ω of the voltage signal is close to or consistent with the first-order longitudinal vibration natural frequency of the cylindrical piezoelectric transducer to be excited.

[0021] In this embodiment, setting the working plane: first set the Cartesian rectangular 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 horizontal working plane, and the piezoelectric resonance self-actuatin...

specific Embodiment approach 3

[0025] Embodiment 3. The difference between this embodiment and the frame-type three-degree-of-freedom piezoelectric resonant 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 the pair of electrode coatings are respectively located on the square surfaces on both sides of the piezoelectric body.

[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 body. The electrode coating is realized by coating of appropriate metal materials such as Al, Cu, Ag, Ag-Pd alloy and the like arranged on the surface of the piezoelectric ceramic sheet.

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Abstract

The invention relates to a frame type three-degree-of-freedom piezoelectric resonance self-actuating mechanism and an excitation method thereof, belongs to the field of piezoelectric driving, and themechanism and the excitation method thereof can be applied to the fields of precision driving, medical treatment, micromachinery and the like. The invention aims to solve the problems that an existingthree-degree-of-freedom piezoelectric self-actuating device is small in output force, high in cost and insufficient in actuating capacity. The three-degree-of-freedom piezoelectric resonance self-actuating mechanism is of a frame type structure, the electric resonance self-actuating mechanism comprises four sets of series columnar piezoelectric transducers of the same structure and connecting devices of the series columnar piezoelectric transducers, and each set of series columnar piezoelectric transducers can be regarded as being composed of two columnar longitudinal vibration transducers connected through two triangular beams. According to the excitation method of the self-actuating mechanism, longitudinal vibration of the four sets of series columnar piezoelectric transducers is excited through two-phase voltage excitation signals, and the three-degree-of-freedom actuating function of the self-actuating mechanism on the plane is achieved.

Description

technical field [0001] The present invention relates to a frame-type three-degree-of-freedom piezoelectric resonant self-actuating mechanism and its excitation method. A self-actuating mechanism, and the piezoelectric resonant self-actuating mechanism can realize its three-degree-of-freedom actuating function on a plane by using the excitation method, and the invention belongs to the field of piezoelectric drive technology. Background technique [0002] The piezoelectric self-actuating mechanism converts 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 kinetic energy of the self-actuating mechanism body through the contact friction between the driving foot and the working surface. Achieve linear or rotary motion from a self-actuating mechanism. [0003] The remarkable advantages of the piezoelectric self-actuating mechanism are: easy to realiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00H02N2/06B25J9/10B25J9/12
CPCH02N2/0095H02N2/06B25J9/10B25J9/12
Inventor 周详宇罗雪冬汪从哲魏博杨德伟
Owner CHONGQING UNIV OF POSTS & TELECOMM
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