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Step-peristaltic drive excitation method based on bending motion of multi-piezoelectric vibrator

A piezoelectric vibrator, driving excitation technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. Stroke and other issues, to achieve the effect of flexible output motion form, high positioning accuracy, and large output displacement

Active Publication Date: 2017-06-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing piezoelectric drive technology is difficult to achieve both positioning and travel, and that the applied signal and output displacement are limited due to the piezoelectric stack device working in the axial telescopic mode.

Method used

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  • Step-peristaltic drive excitation method based on bending motion of multi-piezoelectric vibrator
  • Step-peristaltic drive excitation method based on bending motion of multi-piezoelectric vibrator
  • Step-peristaltic drive excitation method based on bending motion of multi-piezoelectric vibrator

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specific Embodiment approach 1

[0064] Specific implementation mode one: refer to figure 1 , image 3 , Figure 4 and Figure 5 Specifically explain this embodiment, the step-peristal driving excitation method based on the bending motion of multiple piezoelectric vibrators described in this embodiment, this method requires n piezoelectric vibrators arranged in parallel, n is a positive integer, and n≥2; Each piezoelectric vibrator includes a horizontally curved ceramic group 1-1, a vertically curved ceramic group 1-2, a horn 1-3 and a driving foot 1-4;

[0065] The horizontal bending ceramic group 1-1 is composed of two piezoelectric ceramic halves that are horizontally buckled,

[0066] The vertical bending ceramic group 1-2 is composed of two piezoelectric ceramic half groups that are vertically buckled,

[0067] And the horizontal curved ceramic group 1-1 and the vertical curved ceramic group 1-2 are arranged concentrically,

[0068] The mover 3 is a cuboid structure,

[0069] One end of the horizon...

specific Embodiment approach 2

[0094]Specific embodiment 2: This embodiment is a further description of the step-peristal driving excitation method based on the bending motion of the multi-piezoelectric vibrator described in the specific embodiment 1. In this embodiment, the horizontal bending ceramic group 1-1 is applied When the same DC excitation voltage is applied, one of the two piezoelectric ceramic halves is elongated and the other is shortened; when the vertical bending ceramic group 1-2 is applied with the same DC excitation voltage, one of the two piezoelectric ceramic halves is elongated and the other is shortened. shorten.

specific Embodiment approach 3

[0095] Specific implementation mode three: refer to figure 1 , image 3 , Figure 4 and Figure 6 This embodiment will be specifically described. The step-peristal driving excitation method based on the bending motion of multiple piezoelectric vibrators described in this embodiment will be further described. In this embodiment, this method requires n piezoelectric vibrators arranged in parallel, and n is A positive integer, and n≥2; each piezoelectric vibrator includes a horizontally curved ceramic group 1-1, a vertically curved ceramic group 1-2, a horn 1-3 and a driving foot 1-4;

[0096] The horizontal curved ceramic group 1-1 and the vertical curved ceramic group 1-2 are reset along the axis of the piezoelectric vibrator 1, and the two piezoelectric ceramics of the horizontal curved ceramic group 1-1 are arranged between the horizontal curved ceramic group 1-1 and the vertical The left and right two quarters and a half of the structure formed by the curved ceramic group...

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Abstract

The invention discloses a stepping peristalsis type driving and exciting method based on multi-piezoelectric-vibrator bending movement, and relates to the field of electric precise driving. The problems that an existing piezoelectric driving technology can hardly achieve positioning and strokes at the same time, and applied signals and output displacement are limited when a piezoelectric stack device works in an axial telescopic mode are solved. An amplitude-change pole is arranged at the tail end of each piezoelectric vibrator, a drive foot is arranged at the tail end of each amplitude-change pole, and a horizontal bent ceramic set and a vertical bent ceramic set are arranged at the head end of each piezoelectric vibrator; the head ends of the n piezoelectric vibrators are all fixedly connected with a base, the side faces of the drive feet all make contact with a rotor, and the vertical bent ceramic sets apply DC exciting signals to generate bending in the vertical direction; the horizontal bent ceramic sets apply DC exciting signals to generate bending in the horizontal direction, and when the drive feet make contact with the rotor, the drive feet can drive the rotor to do the horizontal movement through friction force; it is ensured that one drive foot keeps making contact with the rotor. The method is used for piezoelectric precise driving.

Description

technical field [0001] The invention relates to a stepping and peristaltic driving excitation method based on the bending motion of multiple piezoelectric vibrators, belonging to the technical field of precision driving. Background technique [0002] Piezoelectric drive has the advantages of no electromagnetic interference, power-off self-locking, simple structure, low-speed high-torque, high torque density, fast response, etc. It has been successfully applied in aerospace, MEMS and optical precision engineering and other fields. Piezoelectric drives can be divided into resonant piezoelectric drives and non-resonant piezoelectric drives according to the frequency used for excitation. The resonant piezoelectric drive utilizes the resonant frequency of the piezoelectric vibrator to form an elliptical or oblique motion track at the driving position. However, due to the limitation of the working principle, the positioning accuracy of the resonant piezoelectric drive can only re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
CPCH02N2/003H02N2/0075
Inventor 刘英想徐冬梅刘军考陈维山冯培连
Owner HARBIN INST OF TECH
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