Shear Strain Amplifier

A technology of amplifying devices and strain gauges, which is applied in measuring devices, electromagnetic measuring devices, and using stable shear force to test the strength of materials, etc. It can solve the problem that shear strain cannot distinguish vehicle load well, and the test effect is not good, etc. problems, to achieve the effect of eliminating adverse effects, improving the accuracy of load identification, and low cost

Active Publication Date: 2022-03-11
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the shear strain of bridge structures is mainly measured by strain gauges, vibrating wire sensors, and tool strain gauges arranged in the form of strain rosettes. The shear strain measured by this method cannot distinguish the vehicle load well, and the test effect is not good.

Method used

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Embodiment Construction

[0028] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0029] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a shear strain amplification device, which belongs to the field of structural engineering. The device includes a strain gauge, a mounting plate and a flexible isolation block; the mounting plate is a V-shaped plate with two arms, and the three ends of the V-shaped plate are correspondingly provided with mounting holes I, II and III; The two arms of the mounting piece are correspondingly provided with a left notch Ⅰ and a right notch Ⅰ, and the left notch Ⅰ and the right notch Ⅰ are symmetrical about the central axis OO' of the mounting piece, and the left notch Ⅰ and the right notch Ⅰ are both An S-shaped through-slot formed by connecting five linear slots head to tail; two flexible spacers are correspondingly fitted in the linear slots in the middle of the left notch I and right notch I, and the flexible spacers correspond to each S The shaped through groove is divided into two parts; there are four strain gauges, which are pasted two by two on the flexible isolation blocks of the two arms; the four strain gauges are connected in the form of a full bridge. The device can amplify the measurement results of shear strain, and has the function of temperature, shrinkage and creep self-compensation.

Description

technical field [0001] The invention belongs to the field of structural engineering, and in particular relates to a shear strain amplification device. Background technique [0002] The shear strain can be used to calculate the load of the structure. For example, by measuring the amplitude of the shear strain change of the bridge web, the load of the vehicle passing on the bridge can be calculated. [0003] Since the shear stress of the bridge under the vehicle load is usually small when the vehicle passes through the bridge, the test is difficult. In order to improve the measurement accuracy of the shear strain, it is necessary to amplify the shear strain measurement. At present, the shear strain of bridge structures is mainly measured by strain gauges, vibrating wire sensors, and tool strain gauges arranged in the form of strain rosettes. The shear strain measured by this method cannot distinguish the vehicle load well, and the test effect is not good. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/24G01B7/16G01N3/02
CPCG01N3/24G01B7/16G01B7/18G01N3/02G01N2203/0025G01N2203/0682
Inventor 郑万山唐光武刘海明刘怀林熊邵辉
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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