A kind of internal cross-section rotation angle sensor of strain type structure and its calibration method
A cross-section corner and strain-type technology, which is applied in the direction of instruments, measuring devices, and electric devices, can solve the problems of complicated operation and installation, high price, and inability to apply the internal cross-section corner test of the structure, and achieves convenient disassembly, low cost, and excellent structure. reasonable effect
Active Publication Date: 2016-06-08
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology
[0003] What the present invention aims to solve is to overcome the deficiencies of the above-mentioned prior art, which are expensive, complicated to operate and install, and cannot be applied to the test of internal cross-section angles in the field of civil engineering, and provide a kind of structure that is reasonable in structure, easy to disassemble, reliable and stable in installation, and low in cost. Internal cross-section angle sensor with strain gauge structure and its calibration method
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[0020] From figure 1 It can be seen that a strain-type structural internal section angle sensor includes a fixed end connecting block 1, a flat beam 2, a free end connecting body 3, and the like. The fixed-end connecting block 1 and the free-end connecting body 3 are respectively fixedly connected to the embedded parts on both sides of the tested section of the structure by bolts, adsorption, welding and other means.
[0021] From figure 2 It can be seen that the fixed end connection block 1 of the present invention is provided with a U-shaped groove 1-2 with one side opening, and the upper and lower side plates of the U-shaped groove are respectively provided with bolt connection holes 1-1, and the upper side plate is for Elastically deformable thin steel sheet. The lower side plate is a fixed thick steel plate. In this way, when the fixed end 2-2 of the flat beam is connected by the connecting bolt, it can ensure that the fixed end of the flat beam is effectively pressed...
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The invention relates to a strain structure inside cross section corner sensor and a calibration method thereof. The strain structure inside cross section corner sensor comprises a bottom plate and a top plate. The bottom plate and the top plate are equal in area size and are vertically opposite to each other. Four vertical force measuring rods and four oblique force measuring rods are arranged between the top plate and the bottom plate, and internal threads are arranged at the two ends of each force measuring rod which is directly connected between the top plate and the bottom plate through bolts. A plurality of uniaxial strain gauges are attached to each force measuring rod. The strain output values of the strain gauges on all the force measuring rods of a testing cross section are recorded, and the components of all internal forces on the testing cross section can be obtained according to a calibrated verified matrix. The strain structure inside cross section corner sensor is simple and reasonable in structure, strain on the force measuring rods is detected so that the internal force of the testing cross section can be measured, mounting is reliable and stable, cost is low, and the internal force testing demand for any cross section in a civil engineering structure can be met.
Description
technical field [0001] The invention belongs to the field of civil engineering, and specifically relates to a strain-type structure internal cross-section rotation angle sensor and a calibration method thereof. Background technique [0002] Earthquake is one of the most threatening natural disasters to human beings. Especially in recent years, the earth’s crust has entered an active period. There have been many major earthquakes at home and abroad, such as the 8.0 earthquake in Wenchuan in 2008, the 7.1 earthquake in Yushu, Qinghai in 2010, and the 7.3 earthquake in Port-au-Prince, Haiti. The magnitude 8.8 earthquake in Chile and the magnitude 9.0 earthquake in Japan in 2011 caused a large number of casualties and property losses, among which the damage and collapse of various buildings and structures was the most important cause of casualties and direct economic losses. Therefore, we must take effective measures to improve the safety of our building structure, which require...
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IPC IPC(8): G01B7/30
Inventor 陈再现韩光方韬陈家辉王瑞
Owner HARBIN INST OF TECH AT WEIHAI