Shearing strainamplifying device
A technology of amplifying device and strain gauge, which is used in measuring device, electromagnetic measuring device, and testing material strength by applying stable shear force. problems, to achieve the effect of eliminating adverse effects, improving load recognition accuracy, and low cost
Active Publication Date: 2019-11-15
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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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.
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[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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The invention relates to a shearing strainamplifying device, and belongs to the field of structural engineering. The device comprises strain gauges, a mounting sheet and flexible isolation blocks, wherein the mounting sheet comprises a V-shaped plate provided with two support arms, and a mounting hole I, a mounting hole II and a mounting hole III are correspondingly formed in three ends of the V-shaped plate; a left notch I and a right notch I are correspondingly formed in the two support arms of the mounting sheet and are symmetrical about a center axis OO' of the mounting sheet, and each ofthe left notch I and the right notch I is an S-shaped through groove formed by five line grooves by sequential end-to-end communication; the two flexible isolation blocks are correspondinglyembedded in the line grooves located in the middles of the left notch I and the right notch I, and each S-shaped through groove is divided into two parts by the corresponding flexible isolation block; the fourstrain gauges are stuck on the flexible isolation blocks of the two support arms in pairs; the four strain gauges are connected in a full-bridge manner. The device can amplify a shearing strain measurement result, and has a self-compensation function for temperature and shrinkage and creep.
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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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