Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method

A technology of resistance strain gauges and piezoelectric ceramics, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of large number of parts, large volume, flexible hinges and The workbench requires high machining accuracy and other issues, so as to achieve the effect of low drive power, small size, and normal displacement output

Active Publication Date: 2014-02-19
苏州迈客荣自动化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of structure has a large volume and a large number of parts, and requires high processing accuracy for flexible hinges and workbenches.

Method used

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  • Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method
  • Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method
  • Closed-loop-controlled encapsulating piezoelectric ceramic actuator and resistance strain gauge fixing method

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Embodiment Construction

[0035] Piezoelectric ceramic actuators in the prior art all adopt a laminated structure in order to achieve a larger driving range, and are hard and brittle ceramic materials that are easily damaged, so the wear rate is very high during use. On the other hand, due to the hysteresis and creep characteristics of piezoelectric ceramics, the displacement output is nonlinear during the movement process, and the movement accuracy is poor. At present, the method of packaging piezoelectric ceramics is generally used to improve the service life of piezoelectric ceramics. Among them, there is a method of packaging piezoelectric ceramics with flexible hinges "direct drive nanoscale precision positioning platform (patent number: 201220411967.5), but this This kind of structure has a large volume and a large number of parts, and requires high processing accuracy for flexible hinges and workbenches.

[0036] The present invention aims at the deficiencies in the prior art, and the present in...

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Abstract

The invention discloses a closed-loop-controlled encapsulating piezoelectric ceramic actuator and a resistance strain gauge fixing method. Resistance strain gauges are arranged on the planes of the two opposite sides of piezoelectric ceramic so that nonlinear characteristics such as lag and creepage of the piezoelectric ceramic in the process of displacement output can be effectively eliminated. Consequently, the normal displacement output of the piezoelectric ceramic is guaranteed, and output accuracy is improved. Meanwhile, the displacement output amount can be fed back through the resistance strain gauges, so that closed loop control is achieved, and the actuator is simple and compact in overall structure and small in size. Due to the fact that the piezoelectric ceramic is arranged inside a stainless steel sleeve, the stainless steel sleeve is capable of effectively protecting the piezoelectric ceramic against external vibration, impact, inertia force and the like so as to improve reliability, stability and installability of the piezoelectric ceramic and ensure the service life of the piezoelectric ceramic.

Description

technical field [0001] The invention belongs to the technical field of micro-drive applications, and in particular relates to a packaged piezoelectric ceramic actuator and a fixing method for resistance strain gauges for realizing closed-loop control. Background technique [0002] At present, the advantages of piezoelectric ceramic actuators have been widely recognized and applied. Piezoelectric ceramics work by using the inverse piezoelectric effect of piezoelectric materials, and can be driven only by the magnitude of the external electric field. Piezoelectric ceramics overcome the large inertia of mechanical, hydraulic, pneumatic, electromagnetic actuators and other actuators in the past , slow response, complex structure, poor reliability, etc. It has small size, compact structure, no mechanical friction, no gap, high resolution, fast response, no heat generation, no magnetic field interference, and can be used in low temperature and vacuum environments And other advant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/02H02N2/04
Inventor 钟博文王振华孙立宁金子祺钱哲
Owner 苏州迈客荣自动化技术有限公司
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