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A high-precision dynamic testing method for corners

A dynamic test, high-precision technology, applied in the direction of measuring angles, measuring devices, mapping and navigation, etc., can solve problems such as reducing sensitivity

Active Publication Date: 2022-02-25
CENT SOUTH UNIV
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  • Summary
  • 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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  • A high-precision dynamic testing method for corners
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  • A high-precision dynamic testing method for corners

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Experimental program
Comparison scheme
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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PUM

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Abstract

The invention relates to a high-precision dynamic testing method and device for a corner, and belongs to the technical field of civil engineering measurement. The method of the invention connects the corner measuring point and the fixed plane, converts the unknown corner information into the corresponding vertical displacement and corresponding strain information, utilizes the mature strain testing technology, reads the strain information dynamically with high precision, and then back-calculates the measuring point The angle of rotation of the section relative to the fixed plane. Aiming at the field of bridge beam end angle testing, the beam end angle testing device is designed and manufactured, and the feasibility of beam end angle testing based on strain perception is verified through indoor experiments. The invention overcomes the shortcomings of the traditional testing method, and has the advantages of high measurement resolution, low cost, high sensitivity, and stable linear relationship between the input rotation angle signal and the output strain signal. The field of beam end angle testing offers significant advantages.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G01C1/00
Inventor 王宁波傅朝丰
Owner CENT SOUTH UNIV