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Corner high-precision dynamic test method

A dynamic testing, high-precision technology, applied in measuring angles, measuring devices, surveying and navigation, etc., can solve the problem of reducing sensitivity

Active Publication Date: 2021-04-20
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention can improve its measurement range by increasing the length of the elastic beam, increasing the distance from the center of the strain gauge to the end of the elastic beam, reducing the height of the elastic beam, and reducing the effective length of the upper cover, but at the same time it will reduce the sensitivity

Method used

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  • Corner high-precision dynamic test method
  • Corner high-precision dynamic test method
  • Corner high-precision dynamic test method

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Experimental program
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Effect test

Embodiment 1

[0094] according to Figure 5-9 The structural design and preparation of the corner test device; according to Figure 13 (a) Install the equipment and build the test bench. Conduct experimental research in the laboratory. The main components of the device include: upper and lower cover plates, elastic beams (2 pieces), strain sensors (4 pieces) and limit rods. In order to facilitate the fixed connection between the elastic beam and other components, a connecting block is provided at each end of the elastic beam, which is processed into such Figure 13 (b) Dumbbell-shaped form, which is fixed to the upper and lower cover plates through bolts. During the working process, the upper cover of the rotation angle testing device rotates, and the lower cover is fixed, and the angle change value of the upper cover relative to the lower cover is the actual rotation angle. In this corner testing device, except the elastic beam, other parts are rigid bodies, and the connection of each ...

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Abstract

The invention relates to a corner high-precision dynamic test method and device, and belongs to the technical field of civil engineering measurement. According to the method, a corner measuring point and a fixed plane are connected, unknown corner information is converted into corresponding vertical displacement and corresponding strain information, a mature strain testing technology is utilized to dynamically read the strain information in a high-precision mode, and then the corner of the cross section of the measuring point relative to the fixed plane is inversely calculated. Aiming at the field of bridge beam end corner testing, the beam end corner testing device is designed and manufactured, and the feasibility of beam end corner testing based on strain sensing is verified through an indoor test. The method overcomes the defects of the traditional test method, has the advantages of high measurement resolution, low cost, high sensitivity, stable linear relationship between the input corner signal and the output strain signal and the like, is suitable for accurate test of a micro corner, and has remarkable advantages in the field of beam end corner test.

Description

technical field [0001] The patent of the invention relates to a high-precision dynamic testing method for corners, which belongs to the technical field of civil engineering measurement. Background technique [0002] As a detection method, the corner test is an indispensable and important measurement method in bridge erection, railway laying, civil engineering, oil drilling, aviation and navigation, industrial automation, intelligent platform, machining and other fields. At present, most of the rotation angle testers obtain the rotation angle information by measuring the response caused by the behavior of the gravity pendulum. According to the different types of pendulums, the rotation angle testers can be divided into three types: solid pendulum, liquid pendulum and gas pendulum. The response test Means include resistive, capacitive, magnetic, fiber optic or optical, etc. The specifications and parameters of some commercial corner testers are shown in Table 1. It can be see...

Claims

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Application Information

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IPC IPC(8): G01C1/00
Inventor 王宁波傅朝丰
Owner CENT SOUTH UNIV