A Self-Induction Piezoelectric Drive Circuit Based on Feedforward Adaptive Compensation

An adaptive compensation and drive circuit technology, applied in the field of measurement and control, can solve problems such as piezoelectric equivalent capacitance mismatch, induced voltage measurement error, etc., and achieve the effect of eliminating bridge imbalance

Active Publication Date: 2020-05-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a self-induction piezoelectric drive circuit based on feed-forward adaptive compensation, which can solve the problem of induced voltage measurement error caused by the mismatch of the piezoelectric equivalent capacitance in the traditional self-induction piezoelectric drive circuit. question

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Self-Induction Piezoelectric Drive Circuit Based on Feedforward Adaptive Compensation
  • A Self-Induction Piezoelectric Drive Circuit Based on Feedforward Adaptive Compensation
  • A Self-Induction Piezoelectric Drive Circuit Based on Feedforward Adaptive Compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Such as figure 2 Shown, a self-induction piezoelectric drive circuit based on feedforward adaptive compensation, including: piezoelectric self-induction module 1, feedforward module 2, digital potentiometer 3, digital controller 4 and relay switch 5; piezoelectric self-induction Module 1 extracts the piezoelectric induction signal through the bridge circuit, and then applies it to the measurement output through one end of the subtraction circuit; the other end of the subtraction circuit uses the feedforward compensation module 2 to correct the induction signal caused by the imbalance of the bridge arm The measurement error is compensated; the compensation voltage is drawn from the drive voltage terminal, and applied to the digital potential 3 through the voltage follower after the voltage division capacitor and voltage division. Using the adjustable gain characteristic of the digital potentiometer, the amplitude gain of the compensation voltage is determined by the digi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a self-inductive piezoelectric driving circuit based on feed-forward adaptive compensation, which retains the structure of the traditional bridge-type self-inductive driving circuit, relaxes the requirement that the matching capacitance is strictly equal to the equivalent capacitance of the piezoelectric material, and allows the matching capacitance to deviate from the equivalent capacitance in a certain range. Taking the mean square value of the error signal as the objective function and updating the gain of the digital potentiometer according to the iterative formula,the error signal will converge to the minimum value, which shows that the self-induction driving circuit with feed-forward compensation can completely eliminate the influence of the bridge imbalancein theory, especially under the condition that the temperature varies in a large range; Aiming at the condition that the equivalent capacitance of piezoelectric material is sensitive to temperature change, the error signal caused by temperature change can be compensated on-line, which can be widely used in vibration control, position control and structure monitoring, and is conducive to the commercial and practical development of self-inductive piezoelectric actuators.

Description

technical field [0001] The invention relates to the technical field of measurement and control, in particular to a self-induction piezoelectric drive circuit based on feedforward adaptive compensation. Background technique [0002] The positive and inverse piezoelectric effects of piezoelectric materials can be used to make sensors and drivers of mechanical structures respectively, and have good linear relationship and large frequency response width. In practical applications, the lower piezoelectric sensors and piezoelectric drivers are generally manufactured separately and placed in different positions. US5347870 proposes a bridge-type self-induction piezoelectric drive circuit that enables piezoelectric materials to simultaneously extract induction signals under the direct piezoelectric effect and the inverse piezoelectric effect. The application of the self-inductive piezoelectric piezoelectric drive circuit can integrate the piezoelectric sensor and the piezoelectric d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00
CPCH02N2/0075H02N2/008
Inventor 徐志伟王懿喆
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap