Device and method for measuring relationship between lateral vibration displacement and strain of flexible beam

A technology of lateral vibration and displacement, applied in the direction of measuring devices, electromagnetic measuring devices, electrical devices, etc., to achieve the effect of less glue, small size and light weight

Inactive Publication Date: 2017-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The prior art seldom analyzes and researches the distribution of lateral vibration displacement and strain relationship of flexible cantilever beam in low-order mode vibration

Method used

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  • Device and method for measuring relationship between lateral vibration displacement and strain of flexible beam

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Embodiment

[0022] Such as figure 1 As shown, a device for measuring the relationship between lateral vibration displacement and strain of a flexible beam includes a flexible cantilever beam 1. One end of the flexible cantilever beam is fixed to a base, and the other end is free to vibrate as a free end. Install multiple resistance strain gauges 2 on the front or back, and install multiple laser displacement sensors 3 for measuring the vibration lateral displacement at the geometric center point of the resistance strain gauge on the other side of the resistance strain gauge, according to the measured strain signal and lateral displacement signal , It is used to analyze the relationship between lateral vibration displacement and strain distribution of flexible beams.

[0023] In this embodiment, five laser displacement sensors 3 are installed in front of the other side of the flexible cantilever beam, with equal intervals in a line arrangement. One side of the flexible cantilever beam 1 is pa...

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Abstract

The invention discloses a device and a method for measuring the relationship between the lateral vibration displacement and the strain of a flexible beam. The device comprises a flexible cantilever beam. One end of the flexible cantilever beam is fixed by a base, and the other end is a free end. A number of resistance strain gauges are arranged on the front or back of the flexible cantilever beam. A number of laser displacement sensors which are used to measure the vibration lateral displacement at the geometric center the resistance strain gauges are arranged in front of the other side of the flexible cantilever beam. The device further comprises a computer, power amplifier, a motion control card, a vibration exciter and a dynamic strain gauge. According to the device provided by the invention, low-order mode vibration strain distribution and displacement distribution relationship diagram is provided.

Description

Technical field [0001] The invention relates to the technical field of flexible structure vibration analysis, in particular to a device and method for measuring the relationship between the lateral vibration displacement and strain of a flexible beam. Background technique [0002] The vibration modal analysis and vibration control methods and devices of flexible cantilever beams are relatively mature. The existing technology is basically based on strain measurement of the vibration of the flexible cantilever beam for analysis and feedback control; or based on the acceleration sensor installed on the cantilever beam for measurement of vibration and feedback control; or based on the laser displacement sensor to measure the lateral vibration displacement of the flexible beam Perform vibration analysis and feedback control. [0003] The prior art rarely analyzes and studies the distribution of the relationship between the displacement and strain of the lateral vibration of the flexibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16G01B11/02G01H9/00G01H11/06
CPCG01B7/18G01B11/02G01H9/00G01H11/06
Inventor 邱志成
Owner SOUTH CHINA UNIV OF TECH
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